CN101542032A - Non-woven fabric - Google Patents

Abstract

A nonwoven fabric having a predetermined strength with respect to a linear tension. The nonwoven fabric 110 has a plurality of first regions, second regions, and third regions, respectively, the second regions being disposed on both sides of the first regions, and the third regions being disposed on the opposite side of the second regions from the first regions. The first region has the highest content of transversely oriented fibers and the second region has the highest content of longitudinally oriented fibers.

Description

Translated fromChinese

无纺布non-woven fabric

技术领域technical field

本发明涉及无纺布。The present invention relates to nonwoven fabrics.

背景技术Background technique

以往，无纺布被用于在纸尿裤、生理用卫生巾等的卫生用品、擦拭器等的清扫用品、面罩等的医疗用品这样宽广的领域。象这样，无纺布虽然用在各种各样不同的领域，但是，在实际使用在各领域的制品中的情况下，需要制造成与各个制品的用途相适应的性质、构造。Conventionally, nonwoven fabrics have been used in a wide range of fields such as sanitary products such as paper diapers and sanitary napkins, cleaning products such as wipes, and medical products such as face masks. As such, although nonwoven fabrics are used in various fields, when they are actually used in products in various fields, they need to be produced with properties and structures suitable for the use of each product.

无纺布例如通过干式法、湿式法等形成纤维层(纤维网)，通过化学键合法、热轧法等，使纤维层中的纤维彼此结合来制作。还存在有在使用于形成纤维层的纤维结合的工序中，用多个针反复刺该纤维层的方法、包含喷射水流的方法等，从外部对纤维层施加物理的力的工序的方法。A nonwoven fabric is produced by forming a fiber layer (fibrous web) by, for example, a dry method or a wet method, and bonding fibers in the fiber layer to each other by a chemical bonding method, a hot rolling method, or the like. There are also methods in which a physical force is applied to the fiber layer from the outside, such as a method of repeatedly piercing the fiber layer with a plurality of needles in the process of bonding the fibers for forming the fiber layer, or a method including jetting water.

但是，这些方法终究仅仅是使纤维彼此交络，没有对纤维层的纤维的定向、配置还有纤维层的形状等进行调整的方法。即，用这些方法制造出的是单纯片状的无纺布。However, these methods merely entangle the fibers, and do not provide methods for adjusting the orientation and arrangement of the fibers in the fiber layer, the shape of the fiber layer, and the like. That is, what is produced by these methods is a simple sheet-like nonwoven fabric.

另外，例如为了用于吸收性物品的表面片等的无纺布在吸收性物品的使用中，吸收性物品吸收排泄物等的液体的情况下，为了维持或提高对肌肤的触感，希望使用具有凹凸的无纺布等。于是，在专利3587831号公报中，公开了将由热收缩性不同的纤维制作的多个纤维层叠层，进行热熔接等，通过多个纤维层中的至少一层的热收缩，在表面形成了凹凸的无纺布及其制造方法。In addition, for example, in order to use nonwoven fabrics such as top sheets of absorbent articles, in the use of absorbent articles, when the absorbent article absorbs liquids such as excrement, in order to maintain or improve the touch on the skin, it is desirable to use Concave and convex non-woven fabrics, etc. Then, in Japanese Patent No. 3587831, it is disclosed that a plurality of fiber layers made of fibers having different thermal shrinkage properties are laminated, thermally welded, etc., and unevenness is formed on the surface by thermal shrinkage of at least one of the plurality of fiber layers. Non-woven fabrics and methods for their manufacture.

但是，在专利3587831号公报中公开的无纺布，在将该无纺布用于例如象吸收性物品的表面片那样的其它制品的情况下，存在有在制造过程中，由于施加线张力，该无纺布被拉伸，形成在无纺布上的凹凸被压溃，或者凸部的高度比当初的高度低的情况等这样的问题。However, in the nonwoven fabric disclosed in Patent No. 3587831, when the nonwoven fabric is used for other products such as the top sheet of an absorbent article, there is a problem in the manufacturing process due to the application of thread tension. The nonwoven fabric is stretched, the unevenness formed on the nonwoven fabric is crushed, or the height of the convex part is lower than the original height, and the like.

在这里，在专利3587831号公报中公开的无纺布，是将含有热收缩性纤维的第二纤维层叠层到由含有非热收缩性纤维的纤维所形成的第一纤维层的单面侧，通过因热压花而产生的多个热熔接部被一体化的无纺布。详细地说，该无纺布是通过在热压花后，使第二纤维层在水平方向热收缩，在没有热熔接的区域形成由第一纤维层构成的多个隆起部，使热熔接部成为凹部而构成的无纺布。Here, in the nonwoven fabric disclosed in Patent No. 3587831, a second fiber layer containing heat-shrinkable fibers is laminated on one side of a first fiber layer formed of fibers containing non-heat-shrinkable fibers. A nonwoven fabric that is integrated by thermally embossing a plurality of thermally welded portions. In detail, the non-woven fabric is heat-shrunk the second fiber layer in the horizontal direction after thermal embossing, forming a plurality of bulges composed of the first fiber layer in the region without thermal fusion, so that the thermal fusion A non-woven fabric made of recesses.

虽然该无纺布是通过第二纤维层的热收缩，在第一纤维层形成多个隆起部，但是，发现第二纤维层的热收缩在水平方向收缩。即，在使用了该无纺布的制品的制造工序等中，若对该无纺布施加线张力，则存在有第二纤维层容易延伸，第一纤维层的隆起部也追随它被拉伸，或者隆起部的高度比当初的高度低的情况等这样的课题。In this nonwoven fabric, a plurality of raised portions were formed in the first fiber layer by the heat shrinkage of the second fiber layer, but it was found that the heat shrinkage of the second fiber layer shrunk in the horizontal direction. That is, in the manufacturing process of products using the nonwoven fabric, etc., if a linear tension is applied to the nonwoven fabric, there is a possibility that the second fiber layer is easily stretched, and the raised portion of the first fiber layer is also stretched following it. , or when the height of the raised portion is lower than the original height.

本发明是借鉴上述这样的课题而产生的发明，其目的在于，提供一种为了即使施加了线张力，也具有规定的强度，而至少调整了纤维定向的无纺布。The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a nonwoven fabric in which at least the orientation of fibers is adjusted so as to have a predetermined strength even when a thread tension is applied.

发明内容Contents of the invention

本发明者们发现通过从上面侧，向由规定的通气性支撑部件从下面侧支撑的纤维网喷射气体，使构成该纤维网的纤维移动，能够形成至少针对纤维定向，纵定向纤维的含有量不同的多个区域，直至完成了本发明。The inventors of the present invention have found that by injecting gas from the upper side to the fiber web supported from the lower side by a predetermined air-permeable support member, the fibers constituting the fiber web are moved, and the content of at least fiber orientation and longitudinally oriented fibers can be formed. Different multiple areas until the invention is completed.

(1)一种无纺布，是具有第一方向以及与上述第一方向正交的第二方向的无纺布，其特征在于，具有：(1) A non-woven fabric, which is a non-woven fabric having a first direction and a second direction orthogonal to the above-mentioned first direction, characterized in that it has:

多个第一区域、Multiple first regions,

沿上述多个第一区域各个的两侧形成的多个第二区域、a plurality of second regions formed along both sides of each of the plurality of first regions,

以及多个第三区域，所述多个第三区域在上述多个第二区域各个的与上述多个第一区域各个的相对的侧，形成在相邻的上述多个第二区域各个之间，And a plurality of third regions, the plurality of third regions are formed between each of the adjacent plurality of second regions on the opposite side of each of the plurality of second regions to each of the plurality of first regions ,

与上述多个第三区域各个相比，上述多个第一区域各个在上述第二方向定向的纤维的含有率高，Each of the plurality of first regions has a higher content of fibers oriented in the second direction than each of the plurality of third regions,

与上述多个第三区域各个相比，上述多个第二区域各个在上述第一方向定向的纤维的含有率高。Each of the plurality of second regions has a higher content of fibers oriented in the first direction than each of the plurality of third regions.

(2)(1)所述的无纺布中，上述多个第三区域各个的在上述第一方向定向的纤维的含有率是40％到80％，(2) In the nonwoven fabric described in (1), the content of fibers oriented in the first direction in each of the plurality of third regions is 40% to 80%,

上述多个第一区域各个的在上述第一方向定向的纤维的含有率在45％以下，并且比上述多个第三区域各个的在上述第一方向定向的纤维的含有率低10％以上，The content of fibers oriented in the first direction in each of the plurality of first regions is 45% or less, and is 10% or more lower than the content of fibers oriented in the first direction in each of the plurality of third regions,

上述多个第二区域各个的在上述第一方向定向的纤维的含有率在55％以上，并且比上述多个第三区域各个的在上述第一方向定向的纤维的含有率高10％以上。The content of fibers oriented in the first direction in each of the plurality of second regions is 55% or more, and is 10% or more higher than the content of fibers oriented in the first direction in each of the plurality of third regions.

(3)(1)或(2)所述的无纺布中，上述多个第一区域各个的在上述第二方向定向的纤维的含有率在55％以上。(3) In the nonwoven fabric described in (1) or (2), the content of fibers oriented in the second direction in each of the plurality of first regions is 55% or more.

(4)(1)至(3)的任一项所述的无纺布中，上述多个第一区域各个的纤维单位面积重量是3到150g/m²，(4) In the nonwoven fabric described in any one of (1) to (3), each of the plurality of first regions has a fiber basis weight of 3 to 150 g/m² ,

上述多个第二区域各个的纤维单位面积重量是20到280g/m²，The fiber basis weight of each of the plurality of second regions is 20 to 280 g/m² ,

上述多个第三区域各个的纤维单位面积重量是15到250g/m²。The fiber basis weight of each of the above-mentioned plurality of third regions is 15 to 250 g/m² .

(5)(1)至(4)的任一项所述的无纺布中，上述多个第一区域各个的纤维密度在0.18g/cm³以下，(5) In the nonwoven fabric according to any one of (1) to (4), each of the plurality of first regions has a fiber density of 0.18 g/cm³ or less,

上述多个第二区域各个的纤维密度在0.40g/cm³以下，The fiber density of each of the plurality of second regions is below 0.40 g/cm³ ,

上述多个第三区域各个的纤维密度在0.20g/cm³以下。The fiber density of each of the plurality of third regions is 0.20 g/cm³ or less.

(6)(1)至(5)的任一项所述的无纺布中，针对上述多个第一区域、上述多个第二区域以及上述多个第三区域各个的在该无纺布的厚度方向的高度大致均匀。(6) In the nonwoven fabric described in any one of (1) to (5), each of the plurality of first regions, the plurality of second regions, and the plurality of third regions in the nonwoven fabric The height in the thickness direction is substantially uniform.

(7)(1)至(5)的任一项所述的无纺布中，在该无纺布形成有多个槽部，(7) In the nonwoven fabric according to any one of (1) to (5), a plurality of grooves are formed in the nonwoven fabric,

和以与上述多个槽部各个相邻的方式形成的多个凸状部，and a plurality of convex portions formed adjacent to each of the plurality of groove portions,

上述多个第一区域各个构成上述多个槽部各个，Each of the plurality of first regions constitutes each of the plurality of grooves,

上述多个第二区域各个构成在上述多个凸状部的侧部，Each of the plurality of second regions is formed on a side portion of the plurality of convex portions,

上述多个第三区域各个构成在上述多个凸状部的中央部。Each of the plurality of third regions is formed at a central portion of the plurality of convex portions.

(8)(7)所述的无纺布中，在上述槽部的该无纺布的厚度方向的高度在上述凸状部的上述中央部的上述高度的90％以下，(8) In the nonwoven fabric described in (7), the height of the nonwoven fabric in the thickness direction of the groove portion is 90% or less of the height of the central portion of the convex portion,

在上述凸状部的上述侧部的上述高度在上述凸状部的上述中央部的上述高度的95％以下。The said height at the said side part of the said convex part is 95% or less of the said height of the said center part of the said convex part.

(9)(7)或(8)所述的无纺布中，在上述多个槽部各个的纤维单位面积重量相对于在上述多个凸状部各个的平均纤维单位面积重量在90％以下。(9) In the nonwoven fabric described in (7) or (8), the fiber basis weight in each of the plurality of grooves is 90% or less with respect to the average fiber basis weight in each of the plurality of convex parts .

(10)(7)至(9)的任一项所述的无纺布中，隔着上述多个槽部各个相邻的在上述多个凸状部各个的上述高度相互不同。(10) In the nonwoven fabric according to any one of (7) to (9), the heights of the plurality of convex portions adjacent to each other across the plurality of groove portions are different from each other.

(11)(7)至(10)的任一项所述的无纺布中，在上述多个凸状部各个的顶部为扁平状。(11) In the nonwoven fabric described in any one of (7) to (10), each top of each of the plurality of convex portions is flat.

(12)(7)至(11)的任一项所述的无纺布中，在该无纺布的与上述多个槽部以及上述多个凸状部形成的面相反一侧的面上，形成向与上述凸状部的突出方向相反侧突出的多个区域。(12) In the nonwoven fabric described in any one of (7) to (11), on the surface of the nonwoven fabric opposite to the surface on which the plurality of groove portions and the plurality of convex portions are formed , forming a plurality of regions protruding to the side opposite to the protruding direction of the above-mentioned convex portion.

(13)(1)至(6)的任一项所述的无纺布中，在上述多个第一区域各个上形成多个开口部。(13) In the nonwoven fabric described in any one of (1) to (6), a plurality of openings are formed in each of the plurality of first regions.

(14)(13)所述的无纺布中，在上述多个开口部各个的周缘的纤维以沿上述多个开口部各个的周缘的方式定向。(14) In the nonwoven fabric described in (13), the fibers on the peripheral edge of each of the plurality of openings are oriented along the peripheral edge of each of the plurality of openings.

(15)(1)至(14)的任一项所述的无纺布中，该无纺布混合拒水性的纤维。(15) In the nonwoven fabric described in any one of (1) to (14), the nonwoven fabric is mixed with water-repellent fibers.

(16)(1)至(15)的任一项所述的无纺布中，在上述第一方向具有波状的起伏。(16) The nonwoven fabric according to any one of (1) to (15), which has wavelike undulations in the first direction.

发明效果Invention effect

本发明是借鉴上述课题而产生的发明，可以提供一种为了即使施加了线张力，也具有规定的强度，而至少调整了纤维定向的无纺布。The present invention is an invention made in view of the above-mentioned problems, and can provide a nonwoven fabric in which at least the orientation of fibers is adjusted so as to have a predetermined strength even when a thread tension is applied.

附图说明Description of drawings

图1是纤维网的立体图。Fig. 1 is a perspective view of a fiber web.

图2A是第一实施方式的无纺布的俯视图。Fig. 2A is a plan view of the nonwoven fabric of the first embodiment.

图2B是第一实施方式的无纺布的仰视图。Fig. 2B is a bottom view of the nonwoven fabric of the first embodiment.

图3是图2的区域X的放大立体图。FIG. 3 is an enlarged perspective view of a region X in FIG. 2 .

图4A是网状支撑部件的俯视图。Fig. 4A is a top view of a mesh support member.

图4B是网状支撑部件的立体图。Fig. 4B is a perspective view of a mesh support member.

图5是表示图1的纤维网下面侧由图4的网状支撑部件支撑的状态下，向上面侧喷射气体，制造图2的第一实施方式的无纺布的状态的图。5 is a view showing a state in which the nonwoven fabric of the first embodiment shown in FIG. 2 is produced by injecting gas toward the upper side of the fiber web shown in FIG. 1 with the lower side supported by the mesh support member in FIG.

图6是说明第一实施方式的无纺布制造装置的侧视图。Fig. 6 is a side view illustrating the nonwoven fabric manufacturing apparatus of the first embodiment.

图7是说明图6的无纺布制造装置的俯视图。Fig. 7 is a plan view illustrating the nonwoven fabric manufacturing apparatus of Fig. 6 .

图8是图6的区域Z的放大立体图。FIG. 8 is an enlarged perspective view of a region Z in FIG. 6 .

图9是图8的喷出部的仰视图。Fig. 9 is a bottom view of the ejection unit in Fig. 8 .

图10是第二实施方式的无纺布的放大立体图。Fig. 10 is an enlarged perspective view of a nonwoven fabric according to a second embodiment.

图11是第三实施方式的无纺布的放大立体图。Fig. 11 is an enlarged perspective view of a nonwoven fabric according to a third embodiment.

图12是第三实施方式的网状支撑部件的立体图。Fig. 12 is a perspective view of a mesh support member according to a third embodiment.

图13是第四实施方式的无纺布的放大立体图。Fig. 13 is an enlarged perspective view of a nonwoven fabric according to a fourth embodiment.

图14是第五实施方式的无纺布的放大立体图。Fig. 14 is an enlarged perspective view of a nonwoven fabric according to a fifth embodiment.

图15是第六实施方式的无纺布的放大立体图。Fig. 15 is an enlarged perspective view of a nonwoven fabric according to a sixth embodiment.

图16A是第六实施方式的支撑部件的俯视图。Fig. 16A is a plan view of a supporting member of a sixth embodiment.

图16B是第六实施方式的支撑部件的立体图。Fig. 16B is a perspective view of a supporting member of a sixth embodiment.

具体实施方式Detailed ways

下面，参照附图，说明用于实施本发明的最佳方式。Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

图1是纤维网的立体图。图2是第一实施方式的无纺布的俯视图以及仰视图。图3是图2的区域X的放大立体图。图4是网状支撑部件的俯视图以及立体图。图5是表示图1的纤维网下面侧由图4的网状支撑部件支撑的状态下，向上面侧喷射气体，制造图2的第一实施方式的无纺布的状态的图。图6是说明第一实施方式的无纺布制造装置的侧视图。图7是说明图6的无纺布制造装置的俯视图。图8是图6的区域Z的放大立体图。图9是图7的喷出部的仰视图。Fig. 1 is a perspective view of a fiber web. Fig. 2 is a plan view and a bottom view of the nonwoven fabric of the first embodiment. FIG. 3 is an enlarged perspective view of a region X in FIG. 2 . Fig. 4 is a plan view and a perspective view of a mesh support member. 5 is a view showing a state in which the nonwoven fabric of the first embodiment shown in FIG. 2 is produced by injecting gas toward the upper side of the fiber web shown in FIG. 1 with the lower side supported by the mesh support member in FIG. Fig. 6 is a side view illustrating the nonwoven fabric manufacturing apparatus of the first embodiment. Fig. 7 is a plan view illustrating the nonwoven fabric manufacturing apparatus of Fig. 6 . FIG. 8 is an enlarged perspective view of a region Z in FIG. 6 . Fig. 9 is a bottom view of the ejection unit in Fig. 7 .

图10是第二实施方式的无纺布的立体剖视图。图11是第三实施方式的无纺布的立体剖视图。图12是第三实施方式的网状支撑部件的放大立体图。图13是第四实施方式的无纺布的立体剖视图。图14是第五实施方式的无纺布的立体剖视图。图15是第六实施方式的无纺布的立体剖视图。图16是第六实施方式的支撑部件的俯视图以及立体图。Fig. 10 is a perspective cross-sectional view of a nonwoven fabric according to a second embodiment. Fig. 11 is a perspective sectional view of a nonwoven fabric according to a third embodiment. Fig. 12 is an enlarged perspective view of a mesh support member according to a third embodiment. Fig. 13 is a perspective sectional view of a nonwoven fabric according to a fourth embodiment. Fig. 14 is a perspective sectional view of a nonwoven fabric according to a fifth embodiment. Fig. 15 is a perspective cross-sectional view of a nonwoven fabric according to a sixth embodiment. Fig. 16 is a plan view and a perspective view of a support member according to a sixth embodiment.

1.11.1

本实施方式的无纺布是被调整为具有多个第一区域、沿多个第一区域各个的两侧形成的多个第二区域、以及在多个第二区域各个的与形成多个第一区域各个的一侧的相反侧，形成在相邻的第二区域之间的多个第三区域的无纺布。然后，是被形成为纤维在作为第二方向的宽度方向(WD)定向的横定向纤维的含有率为第一区域比第三区域高，纤维在作为第一方向的长度方向(LD)定向的纵定向纤维的含有率为第二区域比第三区域高的无纺布。The nonwoven fabric of this embodiment is adjusted to have a plurality of first regions, a plurality of second regions formed along both sides of each of the plurality of first regions, and a plurality of second regions formed in each of the plurality of second regions. On the opposite side of one side of each one area, a plurality of third area nonwoven fabrics are formed between adjacent second areas. Then, it is formed such that the content rate of transversely oriented fibers in which the fibers are oriented in the width direction (WD) as the second direction is higher in the first region than in the third region, and the fibers are oriented in the length direction (LD) as the first direction. The nonwoven fabric in which the content of longitudinally oriented fibers is higher in the second region than in the third region.

1.2第一实施方式1.2 First Embodiment

根据图2到图5，说明本发明的无纺布的第一实施方式。A first embodiment of the nonwoven fabric of the present invention will be described with reference to FIGS. 2 to 5 .

1.2.1形状1.2.1 Shape

如图2A、图2B以及图3所示，本实施方式的无纺布110是在该无纺布110的一面侧沿长度方向(LD)大致等间隔并列地形成有作为第一区域的多个槽部1的无纺布。然后，在大致等间隔地形成的多个槽部1各个之间，形成由第二区域和第三区域构成的多个凸状部2的各个。该凸状部2与槽部1同样大致等间隔地并列地形成。As shown in FIG. 2A, FIG. 2B and FIG. 3 , thenonwoven fabric 110 of the present embodiment is formed on one side of thenonwoven fabric 110 along the longitudinal direction (LD) at substantially equal intervals as first regions. The non-woven fabric of thegroove part 1. Then, each of the plurality ofconvex portions 2 composed of the second region and the third region is formed between each of the plurality ofgroove portions 1 formed at substantially equal intervals. Theconvex portions 2 are formed in parallel at approximately equal intervals similarly to thegroove portions 1 .

在这里，在本实施方式中，虽然槽部1是大致等间隔并列地形成，但并非被限定于此。例如，槽部1也可以按照每个不同的间隔形成，或者，不是并列，而是也可以以使槽部1彼此的间隔变化的方式形成。另外，即使在凸状部也同样。Here, in this embodiment, although thegroove part 1 is formed in parallel at substantially equal intervals, it is not limited to this. For example, thegrooves 1 may be formed at different intervals, or may be formed so that the intervals between thegrooves 1 vary instead of being arranged in parallel. In addition, the same applies to the convex portion.

另外，虽然本实施方式的无纺布110的凸状部2的高度(厚度方向(TD))大致均匀，但是，例如也可以以相互相邻的凸状部2的高度不同的方式形成。例如，通过调整喷出主要由气体构成的流体的后述的喷出口913的间隔，能够调整凸状部2的高度。例如，缩窄喷出口913的间隔，能够降低凸状部2的高度，反之，通过扩大喷出口913的间隔，能够提高凸状部2的高度。再有，通过以窄的间隔和大的间隔交互的方式形成喷出口913的间隔，还可以交互地形成高度不同的凸状部2。另外，若这样，使凸状部2的高度部分地变化，则由于与肌肤的接触面积下降，还产生了可以减少肌肤的负担的优点。In addition, although the height (thickness direction (TD)) of theconvex part 2 of thenonwoven fabric 110 of this embodiment is substantially uniform, it may form so that the height of theconvex part 2 mutually adjacent may differ, for example. For example, the height of theconvex portion 2 can be adjusted by adjusting the interval betweendischarge ports 913 described later that discharge fluid mainly composed of gas. For example, narrowing the distance between thedischarge ports 913 can reduce the height of theconvex portion 2 , and conversely, increasing the distance between thedischarge ports 913 can increase the height of theconvex portion 2 . Furthermore, by alternately forming the intervals of theejection ports 913 at narrow intervals and large intervals,convex portions 2 having different heights can be alternately formed. In addition, if the height of theconvex portion 2 is partially changed in this way, since the contact area with the skin is reduced, there is also an advantage that the burden on the skin can be reduced.

本实施方式的无纺布110的凸状部2由作为第二区域的侧部8和作为第三区域的中央部9构成。中央部9的无纺布110的厚度方向(TD)的高度可以举例表示出0.3到15mm，好的是0.5到5mm。另外，中央部9的宽度方向(WD)的长度为0.5到30mm，好的是1.0到10mm。另外，隔着侧部8以及槽部1相邻的中央部9彼此间的距离可以举例表示出0.5到30mm，好的是3到10mm。Theconvex part 2 of thenonwoven fabric 110 of this embodiment is comprised from theside part 8 which is a 2nd area, and thecenter part 9 which is a 3rd area. The height in the thickness direction (TD) of thenonwoven fabric 110 of thecentral part 9 is 0.3 to 15 mm, preferably 0.5 to 5 mm. In addition, the length in the width direction (WD) of thecentral portion 9 is 0.5 to 30 mm, preferably 1.0 to 10 mm. In addition, the distance between thecentral parts 9 adjacent to each other via theside part 8 and thegroove part 1 is 0.5 to 30 mm, preferably 3 to 10 mm.

另外，侧部8的无纺布110的厚度方向(TD)的高度可以举例表示出为中央部9的高度的95％以下，好的是50到90％。另外，侧部8的宽度方向(WD)的长度为0.1到10mm，好的是0.3到5.0mm。这样，通过中央部9或者槽部1相邻的侧部8彼此间的距离可以举例表示出为0.1到20mm，好的是0.5到10mm。In addition, the height of the thickness direction (TD) of thenonwoven fabric 110 of theside part 8 is 95% or less of the height of thecenter part 9, preferably 50 to 90%. In addition, the length in the width direction (WD) of theside portion 8 is 0.1 to 10 mm, preferably 0.3 to 5.0 mm. Thus, the distance betweenadjacent side portions 8 of thecentral portion 9 or thegroove portion 1 can be, for example, 0.1 to 20 mm, preferably 0.5 to 10 mm.

另外，槽部1的无纺布110的厚度方向(TD)的高度在中央部9的厚度方向(TD)的高度的90％以下，好的是1到50％，更好的是5到20％的高度。槽部1的宽度方向(WD)的长度可以举例表示出0.1到30mm，好的是0.5到10mm。隔着凸状部2相邻的槽部1彼此间的距离是0.5到20mm，好的是3到10mm。In addition, the height of the thickness direction (TD) of thenonwoven fabric 110 of thegroove part 1 is 90% or less of the height of the thickness direction (TD) of thecentral part 9, preferably 1 to 50%, more preferably 5 to 20%. %the height of. The length in the width direction (WD) of thegroove portion 1 is, for example, 0.1 to 30 mm, preferably 0.5 to 10 mm. The distance betweenadjacent groove portions 1 via theconvex portion 2 is 0.5 to 20 mm, preferably 3 to 10 mm.

通过进行这样的设计，例如，在该无纺布110作为吸收性物品的表面片使用的情况下，可以形成与即使在排泄了大量的规定的液体时，该液体也在表面扩散，抑制了渗出相适应的槽部1。另外，即使是在过剩的外压施加到无纺布110，成为凸状部2被压溃的状态的情况下，也容易维持槽部1产生的空间。另外，即使是在外压施加给该无纺布110的状态下，规定的液体被排泄的情况下，也能够抑制广泛地渗出到表面。再有，即使是在一旦被吸收到吸收体等的规定的液体在外压下退回的情况下，也由于在该无纺布110的表面形成凹凸，与肌肤的接触面积减少。因此，存在能够抑制液体广泛地再附着到肌肤的情况。By making such a design, for example, when thenonwoven fabric 110 is used as a top sheet of an absorbent article, even when a large amount of predetermined liquid is excreted, the liquid spreads on the surface, suppressing leakage. Take out thecorresponding groove part 1. In addition, even when excessive external pressure is applied to thenonwoven fabric 110 and theconvex portion 2 is crushed, it is easy to maintain the space generated by thegroove portion 1 . In addition, even when a predetermined liquid is drained in a state where external pressure is applied to thenonwoven fabric 110 , it is possible to suppress extensive bleeding to the surface. In addition, even when a predetermined liquid once absorbed into the absorber or the like returns under external pressure, the surface of thenonwoven fabric 110 is uneven and the contact area with the skin is reduced. Therefore, it may be possible to suppress extensive reattachment of the liquid to the skin.

在这里，槽部1或者凸状部2的高度、间距、宽度的测定方法如下。例如，将无纺布110在无加压的状态下载置到工作台上，通过显微镜，从无纺布110的截面照片或者截面影像进行测定。另外，中央部9、侧部8以及槽部1的分界是以各部的纵定向纤维和横定向纤维的比率的范围为基准进行判断的。Here, the method of measuring the height, pitch, and width of thegroove portion 1 or theconvex portion 2 is as follows. For example, thenonwoven fabric 110 is placed on a table in a non-pressurized state, and the measurement is performed from a cross-sectional photograph or cross-sectional image of thenonwoven fabric 110 with a microscope. In addition, the boundary of thecentral part 9, theside part 8, and thegroove part 1 was judged based on the ratio range of the longitudinally oriented fiber and the horizontally oriented fiber of each part.

在测定高度(厚度方向(TD)的长度)时，以从无纺布110的最下位置(即，工作台表面)到在朝向上方的方向上所形成的中央部9、侧部8以及槽部1的各个的最高位置为高度进行测定。When measuring the height (the length in the thickness direction (TD)), thecentral part 9, theside part 8, and the groove formed in the upward direction from the lowest position of the nonwoven fabric 110 (that is, the table surface) The highest position of eachpart 1 was measured as height.

另外，相互相邻的中央部9间的间距是测定相邻的中央部9各个的中心位置间的距离。同样，相互相邻的侧部8间的间距是测定相邻的侧部8的中心位置间的距离，相互相邻的槽部1间的间距是测定相邻的槽部1的中心位置间的距离。In addition, the pitch between the mutually adjacentcentral parts 9 is the measurement of the distance between the center positions of the adjacentcentral parts 9 . Equally, the distance between mutuallyadjacent side portions 8 is to measure the distance between the center positions ofadjacent side portions 8, and the distance between mutuallyadjacent groove portions 1 is to measure the distance between the center positions ofadjacent groove portions 1. distance.

在测定中央部9的宽度时，是测定从无纺布110的最下位置(即，工作台表面)到朝向上方中央部9的底面的最大宽度。同样，侧部8以及槽部1也进行测定。When measuring the width of thecentral portion 9 , the maximum width from the lowest position of the nonwoven fabric 110 (that is, the table surface) to the bottom surface toward the uppercentral portion 9 is measured. Similarly, theside portion 8 and thegroove portion 1 were also measured.

在这里，对凸状部2的截面形状没有特别限定。例如，可以举例表示出圆顶状、梯形状、三角状、Ω状、四角状等。为使肌肤触感好，好的是凸状部2的顶面附近以及侧面为曲面。另外，为了即使是在由于外压，凸状部2被压溃这样的情况下，也能够维持槽部1产生的空间，好的是从凸状部2的底面到顶面宽度缩窄。作为凸状部2的好的形状，可以举例表示出大致圆顶状等的曲线(曲面)。Here, the cross-sectional shape of theconvex portion 2 is not particularly limited. For example, a dome shape, a trapezoid shape, a triangle shape, an omega shape, a square shape, etc. can be illustrated. In order to make the skin feel good, it is preferable that the vicinity of the top surface and the side surfaces of theconvex portion 2 be curved surfaces. In addition, in order to maintain the space created by thegroove portion 1 even when theconvex portion 2 is crushed by external pressure, it is preferable that the width of theconvex portion 2 be narrowed from the bottom surface to the top surface. As a preferable shape of theconvex part 2, a curved line (curved surface) such as a substantially dome shape can be exemplified.

1.2.2纤维定向1.2.2 Fiber Orientation

如图3所示，该无纺布110形成有含有纤维101在沿着主要由气体构成的流体喷射的区域的方向的作为长度方向(LD)定向的纵定向纤维的含有率分别不同的区域。分别不同的区域可以举例表示出例如作为第一区域的槽部1、作为第二区域的侧部8以及作为第三区域的中央部9。As shown in FIG. 3 , thisnonwoven fabric 110 is formed with regions having different content ratios of longitudinally oriented fibers oriented in the longitudinal direction (LD) that containfibers 101 in the direction along the region where the fluid mainly composed of gas is jetted. The different regions can be exemplified, for example, thegroove portion 1 as the first region, theside portion 8 as the second region, and thecenter portion 9 as the third region.

在这里，纤维101在长度方向(LD)定向是指纤维101相对于长度方向(LD)，在+45度到-45度的范围内定向，另外，将在长度方向(LD)定向的纤维称为纵定向纤维。于是，纤维101在宽度方向(WD)定向是指纤维101相对于宽度方向(WD)，在+45度到-45度的范围内定向，另外，将在宽度方向(WD)定向的纤维称为横定向纤维。Here, the orientation of thefibers 101 in the length direction (LD) means that thefibers 101 are oriented within the range of +45 degrees to -45 degrees relative to the length direction (LD). In addition, the fibers oriented in the length direction (LD) are called for longitudinally oriented fibers. Therefore, the orientation of thefibers 101 in the width direction (WD) means that thefibers 101 are oriented within the range of +45 degrees to -45 degrees with respect to the width direction (WD), and fibers oriented in the width direction (WD) are referred to as Horizontally oriented fibers.

侧部8是相当于凸状部2的两侧部的区域，该侧部8的纤维101被形成为在沿该凸状部2的长度方向(LD)的方向上定向的纤维(纵定向纤维)多。例如，与该凸状部2的中央部9(凸状部2的相邻的两个两侧部8之间的区域)的纤维101的定向相比，在长度方向(LD)定向。侧部8的纵定向纤维的含有率可以举例表示出55到100％，更好的是60％到100％。在纵定向纤维的含有率比55％小的情况下，存在由于线张力，该侧部8被拉伸的情况。还存在由于侧部8被拉伸，槽部1、后述的中央部9也被线张力拉伸的情况。Theside portion 8 is an area corresponding to both sides of theconvex portion 2, and thefibers 101 of theside portion 8 are formed as fibers oriented in a direction along the longitudinal direction (LD) of the convex portion 2 (longitudinal oriented fiber )many. For example, thefiber 101 is oriented in the longitudinal direction (LD) compared to the orientation of thecentral portion 9 of the convex portion 2 (the region between twoadjacent side portions 8 of the convex portion 2 ). The content of longitudinally oriented fibers in theside portion 8 is, for example, 55 to 100%, more preferably 60 to 100%. When the content of longitudinally oriented fibers is less than 55%, theside portion 8 may be stretched due to line tension. When theside portion 8 is stretched, thegroove portion 1 and thecentral portion 9 described later may also be stretched by the line tension.

中央部9是成为凸状部2的两侧部的侧部8之间的区域，是纵定向纤维的含有率比侧部8低的区域。该中央部9最好将纵定向纤维和横定向纤维适度地混合。Thecentral portion 9 is a region between theside portions 8 serving as both sides of theconvex portion 2 , and is a region in which the content of longitudinally oriented fibers is lower than that of theside portions 8 . It is preferable that thecentral portion 9 is moderately mixed with longitudinally oriented fibers and transversely oriented fibers.

例如，好的是形成为中央部9的纵定向纤维的含有率比侧部8的含有率低10％以上，比槽部1的底部的纵定向纤维的含有率高10％以上。具体地说，好的是纵定向纤维的含有率在40到80％的范围。For example, it is preferable to form the content of the longitudinally oriented fibers in thecentral portion 9 to be 10% or more lower than that in theside portions 8 and to be 10% or more higher than the content of the longitudinally oriented fibers in the bottom of thegroove portion 1 . Specifically, it is preferable that the content of longitudinally oriented fibers is in the range of 40 to 80%.

槽部1由于如上所述，是被直接喷射主要由气体构成的流体(例如，热风)的区域，因此，在长度方向(LD)定向的纤维101被喷到侧部8。然后，由于在宽度方向(WD)定向的纤维残留在槽部1的底部，所以，槽部1的底部的纤维101是横定向纤维比纵定向纤维多。As described above, thegroove portion 1 is a region where a fluid mainly composed of gas (for example, hot air) is directly sprayed, and therefore, thefibers 101 oriented in the longitudinal direction (LD) are sprayed to theside portion 8 . Then, since fibers oriented in the width direction (WD) remain at the bottom of thegroove 1 , thefibers 101 at the bottom of thegroove 1 are more transversely oriented than vertically oriented.

例如，可以举例表示出槽部1的纵定向纤维的含有率比中央部9的纵定向纤维的含有率低10％以上。因此，在槽部1的底部，在该无纺布110中，纵定向纤维的含有率最低，反之，横定向纤维的含有率最高。具体地说，纵定向纤维的含有率在0到45％以下，好的是0到40％。在纵定向纤维的含有率比45％大的情况下，如后所述，由于槽部1的纤维单位面积重量低，所以，难以提高宽度方向(WD)的无纺布的强度。于是，例如在作为吸收性物品的表面片使用了该无纺布110的情况下，在使用该吸收性物品的过程中，存在由于与身体的摩擦而在宽度方向(WD)产生褶皱、或者破损的危险性。For example, it can be exemplified that the content of the longitudinally oriented fibers in thegroove portion 1 is 10% or more lower than the content of the longitudinally oriented fibers in thecentral portion 9 . Therefore, at the bottom of thegroove part 1, in thisnonwoven fabric 110, the content rate of the fiber oriented vertically is the lowest, and conversely, the content rate of the fiber oriented horizontally is the highest. Specifically, the content of longitudinally oriented fibers is 0 to 45% or less, preferably 0 to 40%. When the content of longitudinally oriented fibers is greater than 45%, it is difficult to increase the strength of the nonwoven fabric in the width direction (WD) since the fiber basis weight of thegroove portion 1 is low as described later. Then, for example, when thenonwoven fabric 110 is used as a top sheet of an absorbent article, wrinkles or damage may occur in the width direction (WD) due to friction with the body during use of the absorbent article. of danger.

纤维定向的测定是使用基恩士(Keyence)公司制的数码显微镜VHX-100进行，按照以下的测定方法进行的。(1)以长度方向(LD)为纵方向，将样品设置在观察台上，(2)将无规律地飞到近前的纤维除去，将透镜的焦点集中到样品的最近前的纤维，(3)设定摄影深度(进深)，将样品的3D图像作成在PC画面上。接着，(4)将3D画像转换为2D画像，(5)画面上划多条在测定范围适时地等分长度方向(LD)的平行线。(6)观察在划平行线细分化的各单元中，纤维定向是长度方向(LD)，还是宽度方向(WD)，测定在各个的方向定向的纤维根数。然后，(7)相对于设定范围内的全纤维根数，计算在长度方向(LD)定向的纤维根数的比例和在宽度方向(WD)定向的纤维根数的比例，据此，就可以测定·算出。The measurement of fiber orientation was performed using a digital microscope VHX-100 manufactured by Keyence Corporation, according to the following measurement method. (1) Set the sample on the observation table with the longitudinal direction (LD) as the longitudinal direction, (2) remove the fibers that fly to the near side irregularly, and focus the lens on the fiber closest to the sample, (3) ) to set the imaging depth (depth), and create a 3D image of the sample on the PC screen. Next, (4) convert the 3D image into a 2D image, and (5) draw a plurality of parallel lines on the screen that equally divide the measurement range in the longitudinal direction (LD) at appropriate times. (6) Observe whether the fiber orientation is in the length direction (LD) or the width direction (WD) in each unit divided by drawing parallel lines, and measure the number of fibers oriented in each direction. Then, (7) calculate the ratio of the number of fibers oriented in the length direction (LD) and the ratio of the number of fibers oriented in the width direction (WD) relative to the number of full fibers within the set range, and accordingly, It can be measured and calculated.

1.2.3纤维疏密1.2.3 Fiber density

如图3所示，槽部1被调整为与凸状部2相比，纤维101的纤维密度低。另外，槽部1的纤维密度可以根据主要由气体构成的流体(例如热风)的量、张力等的诸条件任意进行调整。该槽部1的底部的纤维密度具体地说可以举例表示出在0.18g/cm³以下，好的是0.002到0.18g/cm³，更好的是0.005到0.05g/cm³。在槽部1的底部的纤维密度比0.002g/cm³低的情况下，例如在将该无纺布110用于吸收性物品等的情况下，存在该无纺布110容易破损的情况。另外，在该槽部1的底部的纤维密度比0.18g/cm³高的情况下，因为液体难以向下方转移，所以存在滞留在该槽部1的底部，给使用者带来潮湿感的可能性。As shown in FIG. 3 , thegroove portion 1 is adjusted so that the fiber density of thefibers 101 is lower than that of theconvex portion 2 . In addition, the fiber density of thegroove part 1 can be adjusted arbitrarily according to various conditions, such as the amount of fluid (for example, hot air) which consists mainly of gas, and tension. Specifically, the fiber density at the bottom of thegroove portion 1 is 0.18 g/cm³ or less, preferably 0.002 to 0.18 g/cm³ , more preferably 0.005 to 0.05 g/cm³ . When the fiber density at the bottom of thegroove portion 1 is lower than 0.002 g/cm³ , for example, when thenonwoven fabric 110 is used for an absorbent article or the like, thenonwoven fabric 110 may be easily damaged. In addition, when the fiber density at the bottom of thegroove 1 is higher than 0.18 g/cm³ , the liquid is difficult to move downward, so it may stagnate at the bottom of thegroove 1 and give the user a wet feeling. sex.

凸状部2象上述那样，被调整为与槽部1相比，纤维101的纤维密度高。另外，凸状部2的纤维密度可以根据主要由气体构成的流体(例如热风)的量、张力等的诸条件任意进行调整。Theconvex portion 2 is adjusted so that the fiber density of thefibers 101 is higher than that of thegroove portion 1 as described above. In addition, the fiber density of theconvex portion 2 can be adjusted arbitrarily according to various conditions such as the amount of fluid (for example, hot air) mainly composed of gas, and tension.

再有，该凸状部2的侧部可以根据主要由气体构成的流体(例如热风)的量、张力等的诸条件任意进行调整。In addition, the side portion of theconvex portion 2 can be adjusted arbitrarily according to various conditions such as the amount and tension of the fluid mainly composed of gas (for example, hot air).

凸状部2的中央部9的纤维密度例如可以举例表示出0到0.20g/cm³，好的是0.005到0.20g/cm³，更好的是0.007到0.07g/cm³。在该中央部9的纤维密度比0.005g/cm³低的情况下，由于该中央部9所含的液体的自重、外压，中央部9不仅容易被压溃，而且，还存在一次吸收的液体在加压下容易退回的情况。另外，在中央部9的纤维密度比0.20g/cm³高的情况下，存在该中央部9所携带的液体难以向下方转移，液体滞留在该中央部9，给使用者带来潮湿感的情况。The fiber density of thecentral portion 9 of theconvex portion 2 is, for example, 0 to 0.20 g/cm³ , preferably 0.005 to 0.20 g/cm³ , more preferably 0.007 to 0.07 g/cm³ . When the fiber density of thecentral portion 9 is lower than 0.005 g/cm³ , thecentral portion 9 is not only easily crushed due to the self-weight and external pressure of the liquid contained in thecentral portion 9, but also has a tendency to be absorbed once. A condition in which a liquid tends to retreat under pressure. In addition, when the fiber density of thecentral portion 9 is higher than 0.20 g/cm³ , the liquid carried by thecentral portion 9 is difficult to move downward, and the liquid stays in thecentral portion 9, giving the user a wet feeling. Condition.

再有，侧部8的纤维密度可以根据主要由气体构成的流体(例如热风)的量和制造无纺布110时施加的线张力等的诸条件任意进行调整。具体地说，该侧部8的纤维密度可以举例表示出0到0.40g/cm³，好的是0.007到0.25g/cm³，更好的是0.01到0.20g/cm³。在该侧部8的纤维密度比0.007g/cm³低的情况下，存在由于线张力，侧部8被拉伸的情况。另外，在该侧部8的纤维密度比0.40g/cm³高的情况下，存在由于该侧部8所携带的液体难以向下方转移，而滞留在侧部8，给使用者带来潮湿感的可能性。In addition, the fiber density of theside part 8 can be adjusted arbitrarily according to various conditions such as the amount of the fluid mainly composed of gas (for example, hot air) and the thread tension applied when manufacturing thenonwoven fabric 110 . Specifically, the fiber density of theside portion 8 is, for example, 0 to 0.40 g/cm³ , preferably 0.007 to 0.25 g/cm³ , more preferably 0.01 to 0.20 g/cm³ . When the fiber density of theside portion 8 is lower than 0.007 g/cm³ , theside portion 8 may be stretched due to line tension. In addition, when the fiber density of theside portion 8 is higher than 0.40 g/cm³ , there is a possibility that the liquid carried by theside portion 8 is difficult to transfer downward and stays in theside portion 8, giving the user a wet feeling. possibility.

1.2.4纤维单位面积重量1.2.4 Weight per unit area of fiber

如图3所示，槽部1的底部被调整为与凸状部2相比，纤维101的纤维单位面积重量低。另外，槽部1的底部的纤维单位面积重量被调整为与包含槽部1和凸状部2的该无纺布110整体的纤维单位面积重量的平均相比低。As shown in FIG. 3 , the bottom of thegroove portion 1 is adjusted so that the fiber basis weight of thefibers 101 is lower than that of theconvex portion 2 . In addition, the fiber basis weight at the bottom of thegroove portion 1 is adjusted to be lower than the average fiber basis weight of the entirenonwoven fabric 110 including thegroove portion 1 and theconvex portion 2 .

凸状部2象上述那样，被调整为与槽部1的底部相比，纤维101的平均纤维单位面积重量高。另外，槽部1的纤维单位面积重量被调整为与包含槽部1和凸状部2的无纺布110整体的纤维单位面积重量的平均相比低。Theconvex portion 2 is adjusted so that the average fiber basis weight of thefibers 101 is higher than that of the bottom of thegroove portion 1 as described above. In addition, the fiber basis weight of thegroove portion 1 is adjusted to be lower than the average fiber basis weight of the entirenonwoven fabric 110 including thegroove portion 1 and theconvex portion 2 .

无纺布110整体的平均纤维单位面积重量例如可以举例表示出10到200g/m²，好的是20到100g/m²。在将该无纺布110用于例如吸收性物品的表面片的情况下，在平均纤维单位面积重量比10g/m²低的情况下，存在该表面片在使用中容易破损的情况。另外，在该无纺布110的平均纤维单位面积重量比200g/m²高的情况下，存在使液体向下方转移难以顺畅地进行的情况。The average fiber basis weight of the entirenonwoven fabric 110 is, for example, 10 to 200 g/m² , preferably 20 to 100 g/m² . When thenonwoven fabric 110 is used, for example, as a top sheet of an absorbent article, the top sheet may be easily damaged during use if the average fiber basis weight is lower than 10 g/m² . In addition, when the average fiber basis weight of thenonwoven fabric 110 is higher than 200 g/m² , it may be difficult to smoothly transfer the liquid downward.

如图3所示，槽部1的底部被调整为与凸状部2相比，纤维101的纤维单位面积重量低。另外，槽部1的纤维单位面积重量被调整为与包含槽部1和凸状部2的无纺布整体的平均纤维单位面积重量相比低。具体地说，槽部1的底部的纤维单位面积重量可以举例表示出3到150g/m²，好的是5到80g/m²。在该槽部1的底部的纤维单位面积重量比3g/m²低的情况下，例如在该无纺布被用于吸收性物品的表面片的情况下，存在着在吸收性物品的使用中表面片容易破损的情况。另外，在该槽部1的底部的纤维单位面积重量比150g/m²高的情况下，存在该槽部1所携带的液体难以向下方转移，而滞留在槽部1，给使用者带来潮湿感的可能性。As shown in FIG. 3 , the bottom of thegroove portion 1 is adjusted so that the fiber basis weight of thefibers 101 is lower than that of theconvex portion 2 . In addition, the fiber basis weight of thegroove portion 1 is adjusted to be lower than the average fiber basis weight of the entire nonwoven fabric including thegroove portion 1 and theconvex portion 2 . Specifically, the fiber basis weight at the bottom of thegroove portion 1 is, for example, 3 to 150 g/m² , preferably 5 to 80 g/m² . In the case where the fiber basis weight at the bottom of thegroove portion 1 is lower than 3 g/m² , for example, when the nonwoven fabric is used for a top sheet of an absorbent article, there may be a problem in the use of the absorbent article. The surface sheet is easily damaged. In addition, when the fiber basis weight at the bottom of thegroove portion 1 is higher than 150 g/m² , the liquid carried in thegroove portion 1 is difficult to transfer downward, and stays in thegroove portion 1, causing inconvenience to the user. Possibility of moist sensation.

凸状部2象上述那样，被调整为与槽部1相比，纤维101的平均纤维单位面积重量高。凸状部2的中央部9的纤维单位面积重量例如可以举例表示出15到250g/m²，好的是20到120g/m²。在该中央部9的纤维单位面积重量比15g/m²低的情况下，由于该中央部9所含的液体的自重、外压，不仅容易被压溃，而且，还存在一次吸收的液体在加压下容易退回的情况。另外，在中央部9的纤维单位面积重量比250g/m²高的情况下，存在所携带的液体难以向下方转移，液体滞留在该中央部9，给使用者带来潮湿感的情况。Theconvex portion 2 is adjusted so that the average fiber basis weight of thefibers 101 is higher than that of thegroove portion 1 as described above. The fiber basis weight of thecentral portion 9 of theconvex portion 2 is, for example, 15 to 250 g/m² , preferably 20 to 120 g/m² . In the case where the fiber basis weight of thecentral portion 9 is lower than 15 g/m² , thecentral portion 9 is not only easily crushed due to the self-weight and external pressure of the liquid contained in thecentral portion 9, but also there is a liquid that has been absorbed once. A case that is easy to return under pressure. In addition, when the fiber basis weight of thecentral portion 9 is higher than 250 g/m² , the carried liquid is difficult to move downward, and the liquid may remain in thecentral portion 9, giving the user a wet feeling.

再有，作为该凸状部2的侧部的侧部8的纤维单位面积重量可以根据主要由气体构成的流体(例如热风)的量和制造时施加的线张力等的诸条件任意进行调整。具体地说，该侧部8的纤维单位面积重量可以举例表示出20到280g/m²，好的是25到150g/m²。在该侧部8的纤维单位面积重量比20g/m²低的情况下，存在由于制造时施加的线张力，侧部8被拉伸的情况。另外，在该侧部8的纤维单位面积重量比280g/m²高的情况下，存在由于该侧部8所携带的液体难以向下方转移，而滞留在侧部8，给使用者带来潮湿感的可能性。In addition, the fiber basis weight of theside portion 8 which is the side portion of theconvex portion 2 can be adjusted arbitrarily according to various conditions such as the amount of fluid (such as hot air) mainly composed of gas and the line tension applied during production. Specifically, the fiber basis weight of theside portion 8 is, for example, 20 to 280 g/m² , preferably 25 to 150 g/m² . When the fiber basis weight of theside portion 8 is lower than 20 g/m² , theside portion 8 may be stretched due to the line tension applied during production. In addition, in the case where the fiber basis weight of theside portion 8 is higher than 280 g/m² , the liquid carried by theside portion 8 is difficult to transfer downward, and stays in theside portion 8, causing moisture to the user. possibility of feeling.

另外，槽部1的底部的纤维单位面积重量被调整为比由侧部8以及中央部9构成的凸状部2整体的平均纤维单位面积重量低。例如槽部1的底部的纤维单位面积重量可以举例表示出相对于凸状部2的平均纤维单位面积重量在90％以下，好的是3到90％，更好的是3到70％。在槽部1的底部的纤维单位面积重量相对于凸状部2的平均纤维单位面积重量比90％高的情况下，落入到槽部1的液体向无纺布110的下方转移时的阻力高，存在液体从槽部1溢出的情况。另外，在槽部1的底部的纤维单位面积重量相对于凸状部2的平均纤维单位面积重量比3％低的情况下，例如在该无纺布被用于吸收性物品的表面片的情况下，存在着在吸收性物品的使用中表面片容易破损的情况。In addition, the fiber basis weight at the bottom of thegroove portion 1 is adjusted to be lower than the average fiber basis weight of the entireconvex portion 2 composed of theside portion 8 and thecentral portion 9 . For example, the fiber basis weight at the bottom of thegroove portion 1 is 90% or less, preferably 3 to 90%, more preferably 3 to 70% of the average fiber basis weight of theconvex portion 2 . When the fiber basis weight at the bottom of thegroove part 1 is higher than 90% of the average fiber basis weight of theconvex part 2, the resistance when the liquid falling into thegroove part 1 is transferred to the bottom of thenonwoven fabric 110 High, there is a case where the liquid overflows from thegroove part 1. In addition, when the fiber basis weight at the bottom of thegroove portion 1 is lower than 3% relative to the average fiber basis weight of theconvex portion 2, for example, when the nonwoven fabric is used for a top sheet of an absorbent article Under such conditions, the topsheet may be easily damaged during use of the absorbent article.

1.2.5其它1.2.5 Others

在例如为了吸收或者透过规定的液体而使用本实施方式的无纺布的情况下，因为槽部1使液体透过，凸状部2是多孔构造，所以，难以保持液体。For example, when the nonwoven fabric of the present embodiment is used for absorbing or permeating a predetermined liquid, thegroove portion 1 allows the liquid to pass through and theconvex portion 2 has a porous structure, so it is difficult to hold the liquid.

槽部1的底部因为纤维101的纤维密度低，纤维单位面积重量少，所以是适合使液体透过的物品。再有，由于槽部1的底部的纤维101在宽度方向(WD)定向，所以，能够防止液体在槽部1的长度方向(LD)过度流动，广泛地扩散。因为与槽部1的纤维单位面积重量低无关，槽部1的纤维101在宽度方向(WD)定向，所以，提高了无纺布的宽度方向(WD)的强度。The bottom of thegroove portion 1 is suitable for liquid permeation because the fiber density of thefibers 101 is low and the fiber basis weight is small. Furthermore, since thefibers 101 at the bottom of thegroove portion 1 are oriented in the width direction (WD), the liquid can be prevented from excessively flowing in the longitudinal direction (LD) of thegroove portion 1 and spread widely. Since thefibers 101 of thegroove portion 1 are oriented in the width direction (WD) regardless of the low fiber basis weight of thegroove portion 1, the strength of the nonwoven fabric in the width direction (WD) is improved.

无纺布110虽然被调整为凸状部2的平均纤维单位面积重量高，但是，据此，由于纤维根数增大，所以，熔接点数量增加，维持了多孔构造。另外，在凸状部2中，被调整为比中央部9纤维单位面积重量以及纤维密度高的侧部8以支撑凸状部2的中央部9的方式被形成。即，侧部8由于其纤维101的大部分在长度方向(LD)定向，所以，纤维间距离缩短，据此，纤维密度提高，刚性也提高。据此，该侧部8支撑凸状部2整体，能够防止凸状部2因外压等被压溃的情况。Although thenonwoven fabric 110 is adjusted so that the average fiber basis weight of theconvex portion 2 is high, since the number of fibers increases accordingly, the number of welding points increases and the porous structure is maintained. In addition, in theconvex portion 2 , theside portion 8 adjusted to have a higher fiber basis weight and fiber density than thecentral portion 9 is formed to support thecentral portion 9 of theconvex portion 2 . That is, since most of thefibers 101 of theside portion 8 are oriented in the longitudinal direction (LD), the distance between the fibers is shortened, thereby increasing the fiber density and increasing the rigidity. Accordingly, theside portion 8 supports the entireconvex portion 2, and it is possible to prevent theconvex portion 2 from being crushed by external pressure or the like.

另外，在槽部1，每单位面积的横定向纤维的含有率比中央部9高，在侧部8，每单位面积的纵定向纤维的含有率比中央部9高。然后，在中央部9，在厚度方向(TD)定向的纤维101含有得比槽部1、侧部8多。据此，即使通过向中央部9施加例如载荷，凸状部2的厚度减少，在释放了载荷的情况下，也由于其在厚度方向(TD)定向的纤维101的刚性，凸状部2容易恢复到原来的高度。即，能够形成压缩回复性高的无纺布。Further, in thegroove portion 1 , the content rate of transversely oriented fibers per unit area is higher than that of thecentral portion 9 , and in theside portion 8 , the content rate of vertically oriented fibers per unit area is higher than that of thecentral portion 9 . Then, in thecentral portion 9 , thefibers 101 oriented in the thickness direction (TD) are contained more than thegroove portion 1 and theside portion 8 . According to this, even if the thickness of theconvex portion 2 is reduced by applying, for example, a load to thecentral portion 9, when the load is released, theconvex portion 2 is easily Return to original height. That is, it is possible to form a nonwoven fabric with high compression recovery.

1.2.6制造方法1.2.6 Manufacturing method

如图4到图9所示，下面，对制造本实施方式的无纺布110的方法进行说明。首先，将纤维网100载置在作为通气性支撑部件的网状支撑部件210的上面侧。换言之，通过网状支撑部件210，从下侧支撑纤维网100。As shown in FIGS. 4 to 9 , a method of manufacturing thenonwoven fabric 110 of this embodiment will be described below. First, thefiber web 100 is placed on the upper surface side of themesh support member 210 as an air-permeable support member. In other words, thefiber web 100 is supported from below by themesh support member 210 .

好的是构成纤维网100的纤维101是平行定向。平行定向是指纤维网整体在长度方向(LD)定向的纤维的比率在50％以上，更好的是60到95％的定向状态。为了使纤维101为平行定向，可以在截止到将空气(气体)流向通过梳棉法形成的纤维网100吹附，对纤维进行再排列的期间，通过利用线张力的调整等，拉伸该纤维网100来形成。Preferably, thefibers 101 making up theweb 100 are oriented in parallel. Parallel orientation refers to an orientation state in which the ratio of fibers oriented in the length direction (LD) of the entire fiber web is 50% or more, more preferably 60 to 95%. In order to orient thefibers 101 in parallel, the fibers can be stretched by adjusting the line tension or the like until the air (gas) is blown onto thefiber web 100 formed by the carding method and the fibers are rearranged. The net 100 is formed.

制造本实施方式的无纺布110的无纺布制造装置90如图6到图9所示，具有通气性支撑部件200、喷出部910以及未图示出的送气部和传送器930，该通气性支撑部件200对作为纤维集合体的纤维网100从一个面侧进行支撑；该喷出部910以及未图示出的送气部作为喷射构件，向被通气性支撑部件200从上述一个面侧支撑的作为纤维集合体的纤维网100，从作为该纤维集合体的纤维网100的另一个面侧喷射主要由气体构成的流体；该传送器930作为移动构件，使作为纤维集合体的纤维网100在规定方向F移动。As shown in FIGS. 6 to 9, a nonwovenfabric manufacturing apparatus 90 for manufacturing thenonwoven fabric 110 of this embodiment has an air-permeable support member 200, adischarge unit 910, and an unillustrated air supply unit andconveyor 930. The air-permeable supportingmember 200 supports thefiber web 100 as a fiber aggregate from one surface side; The supportedfiber web 100 as a fiber aggregate sprays fluid mainly composed of gas from the other side of thefiber web 100 as the fiber aggregate; theconveyor 930 acts as a moving member to make the fiber web as afiber aggregate 100 moves in a predetermined direction F.

通气性支撑部件200是使例如从图6的喷出部910喷出的主要由气体构成的流体，即，在纤维网100通气的主要由气体构成的流体能够向载置着该纤维网100的一侧的相反侧通气的支撑部件。The air-permeable support member 200 is such that, for example, the fluid mainly composed of gas ejected from theejection unit 910 in FIG. One side of the support part is ventilated on the opposite side.

作为在本实施方式中使用的通气性支撑部件200，例如可以举例表示出如图4所示那样的网状支撑部件210。网状支撑部件210是通过织入作为不通气部的规定粗度的多个金属线211而形成。多个金属线211隔开规定间隔被织入，据此，能得到形成了多个作为通气部的孔部213的网状支撑部件。As the air-permeable support member 200 used in this embodiment, themesh support member 210 as shown in FIG. 4 can be illustrated, for example. Themesh support member 210 is formed by weaving a plurality ofmetal wires 211 having a predetermined thickness as an air-impermeable portion. A plurality ofmetal wires 211 are woven at predetermined intervals, whereby a mesh support member in which a plurality ofhole portions 213 serving as ventilation portions are formed can be obtained.

然后，使支撑了该纤维网100的状态的网状支撑部件210在规定方向移动，从该移动的纤维网100的上面侧连续地喷射主要由气体构成的流体，据此，能够制造本实施方式的无纺布110。Then, themesh support member 210 in the state of supporting thefiber web 100 is moved in a predetermined direction, and the fluid mainly composed of gas is continuously sprayed from the upper surface side of the movingfiber web 100, whereby the present embodiment can be manufactured. 110 of non-woven fabrics.

图4的网状支撑部件210如上所述，是形成了多个孔径小的孔部213的部件，从纤维网100的上面侧喷射的主要由气体构成的流体没有妨碍到该网状支撑部件210，通气到下方。该网状支撑部件210没有很大地改变喷射的主要由气体构成的流体的流动，另外，没有使纤维101向该网状支撑部件210的下方向移动。As mentioned above, themesh supporting member 210 of FIG. 4 is formed with a plurality ofsmall hole portions 213, and the fluid mainly composed of gas sprayed from the upper side of thefiber web 100 does not hinder themesh supporting member 210. , vented to the bottom. Themesh support member 210 does not greatly change the flow of the jetted fluid mainly composed of gas, and does not move thefibers 101 downward of themesh support member 210 .

因此，纤维网100的纤维101通过主要从上面侧喷射的主要由气体构成的流体，在规定方向移动。具体地说，因为向网状支撑部件210的下方侧的移动被限制，所以，纤维101在沿该网状支撑部件210的表面那样的方向移动。Therefore, thefibers 101 of thefiber web 100 are moved in a predetermined direction by the fluid mainly composed of gas injected mainly from the upper side. Specifically, since the movement to the lower side of themesh supporting member 210 is restricted, thefibers 101 move in a direction along the surface of themesh supporting member 210 .

例如，喷射了主要由气体构成的流体的区域的纤维101向与该区域相邻的区域移动。然后，喷射主要由气体构成的流体的区域在规定方向移动，因此，结果是，向与喷射了主要由气体构成的流体的规定方向连续的区域的侧方的区域移动。For example, thefiber 101 in the region sprayed with the fluid mainly composed of gas moves to the region adjacent to the region. Then, since the area where the fluid mainly composed of gas is injected moves in a predetermined direction, as a result, it moves to an area lateral to the area continuous with the predetermined direction in which the fluid mainly composed of gas is injected.

据此，形成槽部1，同时，槽部1的底部的纵定向纤维向凸状部2的侧部8侧(槽部1的两侧)移动，槽部1的底部的横定向纤维残留在该槽部1。据此，槽部1的底部的纤维101整体地在宽度方向(WD)定向。另外，从槽部1移动的纵定向纤维被喷到该凸状部2的侧部8。因此，该凸状部2的侧部8的纤维密度提高，同时，形成纤维101整体地在长度方向(LD)定向的侧部8。Accordingly, thegroove portion 1 is formed, and at the same time, the longitudinally oriented fibers at the bottom of thegroove portion 1 move toward theside portion 8 of the convex portion 2 (both sides of the groove portion 1), and the transversely oriented fibers at the bottom of thegroove portion 1 remain in the Thegroove part 1. Accordingly, thefibers 101 at the bottom of thegroove portion 1 are entirely oriented in the width direction (WD). In addition, the longitudinally oriented fibers moving from thegroove portion 1 are sprayed onto theside portion 8 of theconvex portion 2 . Therefore, the fiber density of theside portion 8 of theconvex portion 2 is increased, and at the same time, theside portion 8 in which thefibers 101 are entirely oriented in the longitudinal direction (LD) is formed.

在这里，在无纺布制造装置90中，一面通过移动构件，依次移动纤维网100，一面形成无纺布110。该移动构件使被上述的通气性支撑部件200从一个面侧支撑的状态的作为纤维集合体的纤维网100向规定方向移动。具体地说，使在被喷射有主要由气体构成的流体的状态的纤维网100在规定方向F移动。作为移动构件，可以举例表示出例如图6所示的传送器930。传送器930具有通气性的通气性皮带部939和旋转部931、933，该通气性皮带部939载置通气性支撑部件200，被形成为横向长的环状；该旋转部931、933在被形成为横向长的环状的通气性皮带部939的内侧，被配置在长度方向(LD)的两端，使该环状的通气性皮带部939在规定方向旋转。Here, in the nonwovenfabric manufacturing apparatus 90, thenonwoven fabric 110 is formed while thefiber web 100 is sequentially moved by the moving means. The moving member moves thefiber web 100 , which is a fiber assembly, supported from one side by the air-permeable supportingmember 200 described above in a predetermined direction. Specifically, thefiber web 100 in a state in which the fluid mainly composed of gas is sprayed is moved in a predetermined direction F. FIG. As the moving means, for example, theconveyor 930 shown in FIG. 6 can be exemplified. Theconveyor 930 has an air-permeable air-permeable belt part 939 androtating parts 931, 933. The air-permeable belt part 939 is formed in a horizontally long ring shape on which the air-permeable support member 200 is placed; The inner sides of the horizontally long annular air-permeable belt portion 939 are arranged at both ends in the longitudinal direction (LD), and the annular air-permeable belt portion 939 is rotated in a predetermined direction.

传送器930象上述那样，使从下面侧支撑了纤维网100的状态的网状支撑部件210在规定方向F移动。具体地说，如图6所示，纤维网100以通过喷出部910的下侧的方式移动。进一步，纤维网100以通过两侧面开口的作为加热构件的加热器部950的内部的方式移动。Theconveyor 930 moves themesh support member 210 in the predetermined direction F while supporting thefiber web 100 from the bottom side as described above. Specifically, as shown in FIG. 6 , thefiber web 100 moves so as to pass through the lower side of thedischarge unit 910 . Furthermore, thefiber web 100 moves so as to pass through the inside of theheater part 950 as a heating member which is open on both sides.

喷射构件具有未图示出的送气部以及喷出部910。未图示出的送气部通过送气管920与喷出部910连结。送气管920可通气地连接在喷出部910的上侧。如图9所示，在喷出部910上，以规定间隔形成多个喷出口913。The injection member has an air supply part and adischarge part 910 which are not shown in figure. An air supply unit (not shown) is connected to thedischarge unit 910 through an air supply pipe 920 . The air supply pipe 920 is connected to the upper side of thedischarge part 910 so that ventilation is possible. As shown in FIG. 9 , in thedischarge unit 910 , a plurality ofdischarge ports 913 are formed at predetermined intervals.

从未图示出的送气部通过送气管920送气到喷出部910的气体从在喷出部910上形成的多个喷出口913喷出。从多个喷出口913喷出的气体连续地喷射到被网状支撑部件210从下面侧支撑的纤维网100的上面侧。具体地说，从多个喷出口913喷出的气体连续地喷射到通过传送器930在规定方向F移动的状态的纤维网100的上面侧。The gas sent to thedischarge unit 910 through the gas supply pipe 920 from a gas supply unit (not shown) is sprayed out from a plurality ofdischarge ports 913 formed in thedischarge unit 910 . The gas ejected from the plurality ofejection ports 913 is continuously ejected to the upper side of thefiber web 100 supported from the lower side by themesh support member 210 . Specifically, the gas ejected from the plurality ofejection ports 913 is continuously ejected onto the upper surface side of thefiber web 100 in a state moving in a predetermined direction F by theconveyor 930 .

在喷出部910下方，配置在网状支撑部件210的下侧的吸气部915对从喷出部910喷出，并在网状支撑部件210通气的气体等进行吸气。在这里，通过该吸气部915进行的吸气，还能够进行定位，使纤维网100铺设在网状支撑部件210上。进一步，能够通过吸气，防止碰撞到网状支撑部件210的金属线211的主要由气体构成的流体飞回，扰乱纤维网100的形状，另外，能够在进一步确保通过空气流成形的槽部(凹凸)等的形状的状态下，向加热器部950内运送。在该情况下，好的是在空气流进行成型的同时，一面吸气，一面运送到加热器部950。Below thedischarge part 910 , the air intake part 915 disposed below themesh support member 210 takes in air, etc., which are discharged from thedischarge part 910 and passed through themesh support member 210 . Here, the air suction by the air suction unit 915 can also perform positioning so that thefiber web 100 can be laid on themesh support member 210 . Furthermore, air suction can prevent the fluid mainly composed of gas that collides with themetal wires 211 of themesh support member 210 from flying back and disturbing the shape of thefiber web 100. In addition, the grooves formed by the air flow can be further ensured ( Concave-convex) etc., are transported into theheater unit 950. In this case, it is preferable to transport the mold to theheater unit 950 while sucking air while molding with the air flow.

吸气部915进行的吸引只要是被喷射了主要由气体构成的流体的区域的纤维101被推向网状支撑部件210的程度的强度即可。The suction by the air suction unit 915 may be strong enough to push thefibers 101 in the region to which the fluid mainly composed of gas is injected toward themesh support member 210 .

从喷出口913分别喷出的主要由气体构成的流体的温度象上述那样，只要是常温即可，但是，例如为了使槽部(凹凸)等的成型性良好，可以调整到构成纤维集合体的至少热可塑性纤维的软化点以上，好的是调整到软化点以上，熔点的+50℃到-50℃的温度。因为若纤维软化，则纤维本身的反作用力降低，所以容易确保纤维通过空气流等被再排列的形状，因为若进一步提高温度，则纤维彼此的热熔接开始，所以，更进一步容易确保槽部(凹凸)等的形状。据此，在确保了槽部(凹凸)等的形状的状态下，容易运送到加热器部950内。The temperature of the fluid mainly composed of gas ejected from theejection ports 913 can be as long as it is normal temperature as described above. At least above the softening point of the thermoplastic fiber, preferably at a temperature above the softening point, +50°C to -50°C of the melting point. If the fiber is softened, the reaction force of the fiber itself is reduced, so it is easy to ensure the shape in which the fiber is rearranged by air flow, etc., because if the temperature is further increased, the thermal fusion of the fibers starts, so it is easier to ensure the groove ( Concave-convex) and other shapes. Accordingly, it is easy to transport into theheater unit 950 with the shape of the groove portion (concave-convex) and the like secured.

另外，通过调整喷射的主要由气体构成的流体的风量、温度、引入量、网状支撑部件210的通气性、纤维网100的纤维单位面积重量等，能够使凸状部2的形状变化。例如，在喷射的主要由气体构成的流体的量和吸引(吸气)的主要由气体构成的流体的量大致均等，或者吸引(吸气)的主要由气体构成的流体的量多的情况下，无纺布110的凸状部2的里面侧以沿着网状支撑部件210的形状的方式被形成。因此，在网状支撑部件210为平坦的情况下，该无纺布110的里面侧为大致平坦。In addition, the shape of theconvex portion 2 can be changed by adjusting the air volume, temperature, introduction amount of the injected fluid mainly composed of gas, the air permeability of themesh support member 210, the fiber basis weight of thefiber web 100, and the like. For example, when the amount of fluid mainly composed of gas injected and the amount of fluid mainly composed of gas sucked (inhaled) are approximately equal, or when the amount of fluid mainly composed of gas sucked (inhaled) is large , the back side of theconvex portion 2 of thenonwoven fabric 110 is formed so as to follow the shape of themesh support member 210 . Therefore, when themesh support member 210 is flat, the back side of thenonwoven fabric 110 is substantially flat.

另外，为了在更确保了通过空气流等成型的槽部(凹凸)等的形状的状态下，向加热器部950运送，可以在空气流等进行的槽部(凹凸)等的成型刚刚结束后或者同时向加热器部950内运送，或者在热风(规定温度的空气流)进行的槽部(凹凸)等的成型刚刚结束后，通过冷风等冷却，然后，向加热器部950运送。In addition, in order to convey to theheater unit 950 in a state in which the shape of the grooves (concaves and convexes) formed by the air flow or the like is more ensured, it is possible to immediately form the grooves (concave and convex) etc. by the air flow or the like. Either it is conveyed into theheater part 950 at the same time, or it is conveyed to theheater part 950 after being cooled by cold air or the like immediately after forming the grooves (concavities and convexities) etc. by hot air (air flow at a predetermined temperature).

作为加热构件的加热器部950其在规定方向F的两端被开口。据此，在通过传送器930移动的通气性支撑部件200上载置的纤维网100(无纺布110)在加热器部950的内部所形成的加热空间滞留规定时间，连续地移动。例如，在构成纤维网100(无纺布110)的纤维101含有热可塑性纤维的情况下，能够得到通过该加热器部950的加热，使纤维101彼此结合的无纺布115。Theheater portion 950 as a heating member is opened at both ends in a predetermined direction F. As shown in FIG. Accordingly, the fiber web 100 (nonwoven fabric 110 ) placed on the air-permeable support member 200 moved by theconveyor 930 stays in the heating space formed inside theheater unit 950 for a predetermined time and moves continuously. For example, when thefibers 101 constituting the fiber web 100 (nonwoven fabric 110 ) contain thermoplastic fibers, anonwoven fabric 115 in which thefibers 101 are bonded together by heating by theheater unit 950 can be obtained.

2其它的实施方式2 other implementations

下面，说明本发明的无纺布的其它的实施方式。另外，在下面的实施方式中，没有特别说明的部分与无纺布的第一实施方式相同，在添注在附图的符号也与第一实施方式相同的情况下，标注相同的符号。Next, other embodiments of the nonwoven fabric of the present invention will be described. In addition, in the following embodiment, the part which is not demonstrated in particular is the same as 1st Embodiment of a nonwoven fabric, When the code|symbol added to drawing is also the same as 1st Embodiment, the same code|symbol is attached|subjected.

使用图10到图16，说明本发明的无纺布的第二实施方式到第六实施方式。第二实施方式是有关无纺布的形状的其它的实施方式。第三实施方式是有关无纺布的形态的其它的实施方式。第四实施方式是有关无纺布的形态的其它的实施方式。第五实施方式是凸状部以及槽部的其它的实施方式。第六实施方式是有关无纺布的开口的其它的实施方式。The second to sixth embodiments of the nonwoven fabric of the present invention will be described using FIGS. 10 to 16 . The second embodiment is another embodiment related to the shape of the nonwoven fabric. The third embodiment is another embodiment related to the form of the nonwoven fabric. The fourth embodiment is another embodiment related to the form of the nonwoven fabric. The fifth embodiment is another embodiment of the convex portion and the groove portion. The sixth embodiment is another embodiment related to the openings of the nonwoven fabric.

2.1第二实施方式2.1 Second Embodiment

2.1.1形状2.1.1 Shape

如图10所示，本实施方式的无纺布114是两面大致平坦的无纺布。然后，是形成了规定区域的纤维定向等不同的区域的无纺布。下面，以与第一实施方式的不同点为中心进行说明。As shown in FIG. 10, thenonwoven fabric 114 of this embodiment is a nonwoven fabric with both surfaces substantially flat. Next, it is a nonwoven fabric in which different regions such as fiber orientation in predetermined regions are formed. The following description will focus on differences from the first embodiment.

2.1.2纤维定向2.1.2 Fiber Orientation

如图10所示，在无纺布114上形成纵定向纤维的含有率不同的多个区域。纵定向纤维的含有率不同的多个区域可以举例表示出在该无纺布114中，纵定向纤维的含有率最高的作为第二区域的纵定向部13、与纵定向部13相比，纵定向纤维的含有率低的作为第三区域的中央部12、纵定向纤维的含有率最低，并且横定向纤维的含有率最高的作为第一区域的横定向部11。然后，在该无纺布114上，沿多个横定向部11各个的两侧，分别形成多个纵定向部13。另外，多个中央部12位于与该多个纵定向部13各个的横定向部11侧相反侧的侧部，分别形成在被相邻的纵定向部13夹着的区域。As shown in FIG. 10 , a plurality of regions having different content rates of longitudinally oriented fibers are formed on thenonwoven fabric 114 . The plurality of regions with different content ratios of longitudinally oriented fibers can be exemplified. In thenonwoven fabric 114, the longitudinally orientedportion 13, which is the second region, has the highest content ratio of longitudinally oriented fibers. Thecentral portion 12 is the third region where the content of oriented fibers is low, and the horizontally orientedportion 11 is the first region where the content of longitudinally oriented fibers is the lowest and the content of transversely oriented fibers is the highest. Then, on thenonwoven fabric 114 , a plurality of vertically orientedportions 13 are formed along both sides of each of the plurality of horizontally orientedportions 11 . In addition, the plurality ofcentral portions 12 are located on the side opposite to thehorizontal orientation portion 11 side of each of the plurality ofvertical orientation portions 13 , and are formed in regions sandwiched by adjacentvertical orientation portions 13 .

横定向部11是在纤维网100中，在作为纵方向的长度方向(LD)定向的纤维101通过主要由气体构成的流体被喷到纵定向部13侧后，由残留的纤维101形成的区域。即，因为朝向长度方向(LD)的纤维101通过主要由气体构成的流体向纵定向部13侧移动，所以，在横定向部11，主要残留在作为横方向的宽度方向(WD)定向的横定向纤维。因此，横定向部11的纤维101的大多数在相对于长度方向(LD)交叉的方向(宽度方向(WD))定向。横定向部11虽然如后所述，被调整为纤维单位面积重量低，但是，因为该横定向部11的纤维101的大部分在宽度方向(WD)定向，所以，宽度方向(WD)的拉伸强度提高。据此，例如即使在将该无纺布114用在了吸收性物品的表面片的情况下，在穿用中被施加了宽度方向(WD)的摩擦等的力，也能够防止破损。The transversely orientedportion 11 is a region formed by remainingfibers 101 in thefiber web 100 after thefibers 101 oriented in the longitudinal direction (LD) as the longitudinal direction are sprayed to the longitudinally orientedportion 13 side by a fluid mainly composed of gas. . That is, because thefiber 101 toward the longitudinal direction (LD) moves toward thelongitudinal orientation portion 13 by the fluid mainly composed of gas, in thelateral orientation portion 11, the transverse orientation mainly remains in the width direction (WD) as the transverse direction. oriented fibers. Therefore, most of thefibers 101 of the laterally orientedportion 11 are oriented in a direction (width direction (WD)) intersecting with the longitudinal direction (LD). Although the transversely orientedportion 11 is adjusted so that the fiber basis weight is low as described later, since most of thefibers 101 of the transversely orientedportion 11 are oriented in the width direction (WD), the tension in the width direction (WD) is low. Increased tensile strength. Thereby, even if force such as friction in the width direction (WD) is applied during wearing when thenonwoven fabric 114 is used for the top sheet of an absorbent article, damage can be prevented.

另外，纵定向部13是在纤维网100中，通过朝向长度方向(LD)的纤维101被喷射主要由气体构成的流体，被喷到纵定向部13侧而形成的。然后，因为该纵定向部13的纤维101的多数在长度方向(LD)定向，所以，被形成为各纤维101的纤维间距离缩窄，纤维密度提高。因此，刚性也提高。The longitudinally orientedportion 13 is formed by spraying a fluid mainly composed of gas toward thefibers 101 in the longitudinal direction (LD) of thefiber web 100 and spraying it toward the longitudinally orientedportion 13 side. Then, since most of thefibers 101 in the longitudinally orientedportion 13 are oriented in the longitudinal direction (LD), the distance between thefibers 101 is narrowed, and the fiber density is increased. Therefore, rigidity also improves.

2.1.3纤维疏密2.1.3 Fiber density

如图10所示，被喷射主要由气体构成的流体，横定向部11的纤维101移动，同时，通过被喷射的主要由气体构成的流体的压力，纤维101移动，向无纺布114的厚度方向(TD)的下侧集中。因此，无纺布114的厚度方向(TD)的上侧其空间面积率大，下侧空间面积率小。换言之，无纺布114的厚度方向(TD)的上侧纤维密度低，下侧纤维密度高。As shown in Figure 10 , the fluid mainly composed of gas is sprayed, and thefibers 101 of the transversely orientedportion 11 move. The lower side of the direction (TD) is concentrated. Therefore, the upper side in the thickness direction (TD) of thenonwoven fabric 114 has a large space area ratio, and the lower side has a small space area ratio. In other words, the fiber density on the upper side in the thickness direction (TD) of thenonwoven fabric 114 is low, and the fiber density on the lower side is high.

另外，横定向部11通过被喷射主要由气体构成的流体，横定向部11的纤维101移动，以纤维密度低的方式形成。与此相对，因为纵定向部13成为从横定向部11移动的纤维101集中的区域，所以，被形成为与横定向部11相比，纤维密度高。中央部12的纤维密度被形成为在横定向部11的纤维密度和纵定向部13的纤维密度中间。In addition, the laterally orientedportion 11 is formed to have a low fiber density when the fluid mainly composed of gas is sprayed to move thefibers 101 of the laterally orientedportion 11 . On the other hand, since the longitudinally orientedportion 13 is a region where thefibers 101 moved from the laterally orientedportion 11 are concentrated, it is formed to have a higher fiber density than that of the laterally orientedportion 11 . The fiber density of thecentral portion 12 is formed to be intermediate between the fiber density of the laterally orientedportion 11 and the fiber density of the longitudinally orientedportion 13 .

2.1.4纤维单位面积重量2.1.4 Weight per unit area of fiber

如图10所示，因为由于向横定向部11喷射的主要由气体构成的流体，纤维101向其它的区域移动，所以，横定向部11的纤维单位面积重量最低。另外，通过主要由气体构成的流体喷到从横定向部11移动的纤维101，所以，纵定向部13纤维单位面积重量最高。然后，在该纵定向部13夹着两侧，形成中央部12。即，成为纤维单位面积重量少的区域的中央部12、横定向部11因为纤维单位面积重量高的纵定向部13形成在两侧，所以，即使纤维单位面积重量低，例如在制造该无纺布114的过程中，也能够抑制由于线张力等被拉伸的情况。As shown in FIG. 10 , since thefibers 101 move to other regions due to the fluid mainly composed of gas injected toward the laterally orientedportion 11 , the fiber basis weight of the laterally orientedportion 11 is the lowest. In addition, since the fluid mainly composed of gas is sprayed to thefibers 101 moving from the laterally orientedportion 11, the fiber basis weight in the longitudinally orientedportion 13 is the highest. Then, thecentral portion 12 is formed by sandwiching both sides of the longitudinally orientedportion 13 . That is, since thecentral portion 12 and the transversely orientedportion 11, which are regions with a low fiber basis weight, are formed on both sides of the longitudinally orientedportion 13 with a high fiber basis weight, even if the fiber basis weight is low, for example, when the nonwoven fabric is manufactured, In the process of forming thecloth 114, it is also possible to suppress stretching due to thread tension or the like.

2.1.5其它2.1.5 Others

该无纺布114例如在作为吸收性物品的表面片使用的情况下，能够在维持纤维单位面积重量低的状态的横定向部11、中央部12的状态下，即，在通过制品制造中的线张力等不能被拉伸的状态下，可以使用无纺布114。然后，因为在横定向部11和中央部12之间分别形成纤维单位面积重量高的纵定向部13，所以，在含有液体等时，难以发生该无纺布114由于液体的重量、自重而被压溃的情况。因此，即使反复排泄液体，也能够使液体不在表面扩散，而向该无纺布114的下方转移。For example, when thenonwoven fabric 114 is used as a top sheet of an absorbent article, it can maintain the state of the horizontally orientedportion 11 and thecentral portion 12 in a state where the fiber basis weight is low, that is, through the process of manufacturing the product. Thenonwoven fabric 114 can be used in a state where it cannot be stretched by thread tension or the like. Then, since the longitudinally orientedportions 13 having a high fiber basis weight are respectively formed between the transversely orientedportions 11 and thecentral portion 12, when a liquid or the like is contained, it is difficult for thenonwoven fabric 114 to be damaged due to the weight of the liquid or its own weight. crushing situation. Therefore, even if the liquid is repeatedly discharged, the liquid can be transferred to the lower side of thenonwoven fabric 114 without spreading on the surface.

2.1.6制造方法2.1.6 Manufacturing method

下面，对制造本实施方式的无纺布114的方法进行说明。首先，将纤维网100载置在作为通气性支撑部件的网状支撑部件210的上面侧。换言之，通过网状支撑部件210，从下侧支撑纤维网100。该网状支撑部件210可以使用与第一实施方式的网状支撑部件210相同的网状支撑部件。Next, the method of manufacturing thenonwoven fabric 114 of this embodiment is demonstrated. First, thefiber web 100 is placed on the upper surface side of themesh support member 210 as an air-permeable support member. In other words, thefiber web 100 is supported from below by themesh support member 210 . As themesh support member 210, the same mesh support member as that of themesh support member 210 of the first embodiment can be used.

然后，使支撑了该纤维网100的状态的网状支撑部件210在规定方向移动，通过从该移动的纤维网100的上面侧连续地喷射主要由气体构成的流体，能够制造本实施方式的无纺布114。Then, themesh support member 210 supporting thefiber web 100 is moved in a predetermined direction, and a fluid mainly composed of a gas is continuously sprayed from the upper surface side of the movingfiber web 100 to manufacture the non-woven fabric of the present embodiment.Spinning 114.

喷射到该无纺布114的主要由气体构成的流体的量只要是喷射主要由气体构成的流体的区域的纤维网100的纤维101能够在宽度方向(WD)移动的程度即可。在该情况下，虽然好的是不通过将被喷射的主要由气体构成的流体吸入到网状支撑部件210的下侧的吸气部915进行吸气，但是，也可以以横定向部11没有被推向网状支撑部件210的程度进行吸气。The amount of the fluid mainly composed of gas sprayed onto thenonwoven fabric 114 may be such that thefibers 101 of thefiber web 100 in the region where the fluid mainly composed of gas is sprayed can move in the width direction (WD). In this case, although it is preferable not to inhale the jetted fluid mainly composed of gas into the inhalation part 915 on the lower side of themesh support member 210, it is also possible to use the laterally orientedpart 11 without Inhalation is performed to the extent that it is pushed to themesh support member 210 .

另外，也可以在喷射主要由气体构成的流体，形成具有例如槽部、凸状部2等的凹凸的无纺布后，通过卷绕于辊等，将形成的凹凸压溃。Alternatively, after spraying a fluid mainly composed of gas to form a nonwoven fabric having irregularities such as grooves andconvex portions 2, the formed irregularities may be crushed by winding it on a roll or the like.

再有，通过从网状支撑部件210的下侧引入主要由气体构成的流体，由于被喷射了主要由气体构成的流体的区域的纤维101一面被推向该网状支撑部件210侧，一面移动，因此，纤维集中在网状支撑部件210侧。另外，在中央部12以及纵定向部13中，被喷射的主要由气体构成的流体与网状支撑部件210冲突，飞回，因此，部分地成为纤维在厚度方向(TD)定向的状态。Furthermore, by introducing the fluid mainly composed of gas from the underside of the net-like supportingmember 210, thefibers 101 in the region to which the fluid mainly composed of gas is sprayed are pushed toward the net-like supportingmember 210 and move. , Therefore, the fibers are concentrated on themesh support member 210 side. In addition, in thecentral portion 12 and the longitudinally orientedportion 13, the injected fluid mainly composed of gas collides with themesh support member 210 and flies back, so the fibers are partially oriented in the thickness direction (TD).

本实施方式的无纺布114可以通过上述的无纺布制造装置90制造。该无纺布制造装置90的无纺布114的制造方法等可以参考第一实施方式的无纺布110的制造方法以及无纺布制造装置90的说明的记载。Thenonwoven fabric 114 of this embodiment can be manufactured by the above-mentioned nonwovenfabric manufacturing apparatus 90 . For the manufacturing method of thenonwoven fabric 114 of the nonwovenfabric manufacturing apparatus 90 , reference can be made to the description of the manufacturing method of thenonwoven fabric 110 and the description of the nonwovenfabric manufacturing apparatus 90 of the first embodiment.

2.2第三实施方式2.2 The third embodiment

通过图11、图12，说明本发明的无纺布的第三实施方式。A third embodiment of the nonwoven fabric of the present invention will be described with reference to FIGS. 11 and 12 .

2.2.1无纺布2.2.1 Non-woven fabric

如图11、图12所示，本实施方式的无纺布116在该无纺布116的整体在长度方向(LD)交互地具有起伏这方面与第一实施方式不同。下面，以不同点为中心进行说明。As shown in FIGS. 11 and 12 , thenonwoven fabric 116 of the present embodiment differs from the first embodiment in that the entirenonwoven fabric 116 alternately has undulations in the longitudinal direction (LD). Hereinafter, the difference will be mainly explained.

本实施方式的无纺布116被形成为该无纺布116整体以槽部1以及凸状部2相对于延伸的方向大致正交的方式，具有波状的起伏。Thenonwoven fabric 116 of the present embodiment is formed so that the entirenonwoven fabric 116 has undulations in a wave shape so that thegroove portions 1 and theconvex portions 2 are substantially perpendicular to the extending direction.

2.2.2制造方法2.2.2 Manufacturing method

本实施方式的无纺布116虽然可以与第一实施方式同样地形成，但是，作为通气性支撑部件200的网状支撑部件260的形态不同。本实施方式的网状支撑部件260通过织入作为不通气部的规定粗度的多个金属线261而形成。通过多个金属线261隔开规定间隔被织入，能够得到形成有多个作为通气部的孔部263的网状支撑部件。Although thenonwoven fabric 116 of this embodiment can be formed similarly to 1st Embodiment, the form of themesh support member 260 which is the air-permeable support member 200 differs. Themesh support member 260 of the present embodiment is formed by weaving a plurality ofmetal wires 261 having a predetermined thickness as an air-impermeable portion. By weaving a plurality ofmetal wires 261 at predetermined intervals, it is possible to obtain a mesh support member in which a plurality ofhole portions 263 serving as ventilation portions are formed.

再有，该网状支撑部件260是在与该网状支撑部件260的长度方向或者短边方向的任意一个平行的方向具有波状的起伏的支撑部件。在本实施方式中，例如，如图12所示，被形成为在与轴Y平行的方向交互地具有波状的起伏。In addition, themesh supporting member 260 is a supporting member having wave-like undulations in a direction parallel to either the longitudinal direction or the short side direction of themesh supporting member 260 . In this embodiment, for example, as shown in FIG. 12 , it is formed to alternately have undulations in a wave shape in a direction parallel to the axis Y.

图12的网状支撑部件260如上所述，是形成有多个孔径小的孔部263的部件，从纤维网100的上面侧喷射的气体没有妨碍到该网状支撑部件260，通气到下方。该网状支撑部件260没有很大地改变喷射的主要由气体构成的流体的流动，另外，没有使纤维101向该网状支撑部件260的下方向移动。Themesh support member 260 of FIG. 12 is formed with a plurality ofsmall hole portions 263 as described above, and the gas injected from the upper side of thefiber web 100 does not interfere with themesh support member 260 and flows downward. Themesh support member 260 does not greatly change the flow of the jetted fluid mainly composed of gas, and does not move thefibers 101 downward of themesh support member 260 .

再有，因为该网状支撑部件260本身具有波状的起伏，所以，通过从纤维网100的上面侧喷射的主要由气体构成的流体，纤维网100被成型为具有沿该网状支撑部件260的形状那样起伏的形状。Furthermore, since the net-like support member 260 itself has undulations in a wave shape, thefiber web 100 is formed to have a shape along the net-like support member 260 by the fluid mainly composed of gas sprayed from the upper side of thefiber web 100 . Shapes like undulating shapes.

通过一面向在网状支撑部件260的上面载置的纤维网100喷射主要由气体构成的流体，一面使该纤维网100沿轴X方向移动，能够形成本实施方式的无纺布116。Thenonwoven fabric 116 of the present embodiment can be formed by moving thefiber web 100 in the axis X direction while jetting a fluid mainly composed of gas toward thefiber web 100 placed on the upper surface of themesh support member 260 .

网状支撑部件260的起伏的样态可以任意地设定。例如，可以举例表示出图12所示的向轴X方向的起伏的顶部之间的间距为1到30mm，好的是3到10mm。另外，该网状支撑部件260的起伏的顶部和底部的高低差例如可以举例表示出0.5到20mm，好的是3到10mm。再有，该网状支撑部件260的轴X方向的截面形状如图12所示，不限于波状，可以举例表示出以起伏的顶部和底部各个的顶点呈锐角的方式大致三角形相连的形状、以起伏的顶部和底部各个的顶点为大致平坦的方式大致四角形的凹凸相连的形状等。The shape of the undulations of themesh support member 260 can be set arbitrarily. For example, it can be exemplified that the distance between the tops of the undulations in the direction of the axis X shown in FIG. 12 is 1 to 30 mm, preferably 3 to 10 mm. In addition, the height difference between the undulating top and bottom of themesh support member 260 can be, for example, 0.5 to 20 mm, preferably 3 to 10 mm. Furthermore, the cross-sectional shape of themesh support member 260 in the direction of the axis X is shown in FIG. 12, and is not limited to a wave shape. For example, a shape in which the vertices of the top and bottom of the undulations form an acute angle is roughly triangularly connected. The vertices of the undulating top and bottom are substantially flat and substantially quadrangular in a shape in which concavities and convexities are connected.

本实施方式的无纺布116可以通过上述的无纺布制造装置90制造。该无纺布制造装置90的无纺布116的制造方法等可以参考第一实施方式的无纺布110的制造方法以及无纺布制造装置90的说明的记载。Thenonwoven fabric 116 of this embodiment can be produced by the above-mentioned nonwovenfabric production apparatus 90 . For the manufacturing method of thenonwoven fabric 116 of the nonwovenfabric manufacturing apparatus 90 , etc., reference can be made to the description of the manufacturing method of thenonwoven fabric 110 and the description of the nonwovenfabric manufacturing apparatus 90 of the first embodiment.

2.3第四实施方式2.3 Fourth Embodiment

通过图13，说明本发明的无纺布的第四实施方式。A fourth embodiment of the nonwoven fabric of the present invention will be described with reference to FIG. 13 .

如图13所示，本实施方式的无纺布140与该无纺布140的形成有槽部1以及凸状部2的面的相反侧的面的样态与第一实施方式不同。另外，下面，以与第一实施方式的不同点为中心进行说明。As shown in FIG. 13 , the nonwoven fabric 140 of this embodiment is different from the first embodiment in terms of the surface of the nonwoven fabric 140 opposite to the surface on which thegrooves 1 and theconvex portions 2 are formed. In addition, below, it demonstrates centering on the difference from 1st Embodiment.

2.3.1无纺布2.3.1 Non-woven fabric

本实施方式的无纺布140在其一面侧，交互并列地形成有槽部1以及凸状部2。然后，在无纺布140的另一面侧，相当于凸状部2的底面的区域被形成为朝向该凸状部2所突出的侧呈凸。换言之，无纺布140在该无纺布140的另一面侧，相当于该一面侧的凸状部2的底面的区域凹陷，形成凹部。然后，相当于该一面侧的槽部1的底面的区域突出，形成凸状部。The nonwoven fabric 140 of this embodiment has thegroove part 1 and theconvex part 2 alternately formed in parallel at one surface side. Then, on the other surface side of the nonwoven fabric 140 , a region corresponding to the bottom surface of theconvex portion 2 is formed so as to be convex toward the side from which theconvex portion 2 protrudes. In other words, the nonwoven fabric 140 is dented on the other side of the nonwoven fabric 140 , in a region corresponding to the bottom surface of theconvex portion 2 on the one side, to form a concave portion. Then, a region corresponding to the bottom surface of thegroove portion 1 on the one surface side protrudes to form a convex portion.

2.3.2制造方法2.3.2 Manufacturing method

本实施方式的无纺布140的制造方法与上述的第一实施方式的记载相同。另外，制造该无纺布140时使用的支撑部件可以使用与上述的第一实施方式的网状支撑部件210相同的支撑部件。The manufacturing method of the nonwoven fabric 140 of this embodiment is the same as description of 1st Embodiment mentioned above. In addition, as the support member used when manufacturing this nonwoven fabric 140, the same support member as themesh support member 210 of the said 1st Embodiment can be used.

在本实施方式中，将纤维网100载置在网状支撑部件210上，一面喷射主要由气体构成的流体，一面使该纤维网100沿规定的方向移动，同时，从网状支撑部件210的下方吸引(吸气)所喷射的主要由气体构成的流体。然后，使吸引(吸气)的主要由气体构成的流体的量小于喷射的主要由气体构成的流体的量。象这样，在喷射的主要由气体构成的流体大于吸引(吸气)的主要由气体构成的流体的量的情况下，喷射的主要由气体构成的流体例如与作为通气性支撑部件的网状支撑部件210冲突，略微飞回。然后，飞回到网状支撑部件210的主要由气体构成的流体从凸状部2的下面侧向上面侧穿过。据此，凸状部2的下面侧(底面侧)以向与凸状部2的上面侧相同的方向突出的方式被形成。In the present embodiment, thefiber web 100 is placed on themesh support member 210, and a fluid mainly composed of gas is sprayed to move thefiber web 100 in a predetermined direction. The fluid mainly composed of gas is sucked (suctioned) from below. Then, the amount of the fluid mainly composed of gas sucked (inhaled) is made smaller than the amount of fluid mainly composed of gas injected. Like this, when the amount of the fluid mainly composed of gas injected is greater than the amount of the fluid mainly composed of gas sucked (inhaled), the fluid mainly composed of gas injected is, for example, in contact with the mesh support as the air-permeable supporting member. Part 210 conflicts, flies back slightly. Then, the fluid mainly composed of gas that flies back to themesh support member 210 passes from the lower side to the upper side of theconvex portion 2 . Accordingly, the lower surface side (bottom surface side) of theconvex portion 2 is formed to protrude in the same direction as the upper surface side of theconvex portion 2 .

本实施方式的无纺布140可以通过上述的无纺布制造装置90制造。该无纺布制造装置90的无纺布140的制造方法等可以参考第一实施方式的无纺布110的制造方法以及无纺布制造装置90的说明的记载。The nonwoven fabric 140 of this embodiment can be manufactured by the above-mentioned nonwovenfabric manufacturing apparatus 90 . For the manufacturing method of the nonwoven fabric 140 of the nonwovenfabric manufacturing apparatus 90 , etc., reference can be made to the description of the manufacturing method of thenonwoven fabric 110 and the description of the nonwovenfabric manufacturing apparatus 90 of the first embodiment.

2.4第五实施方式2.4 Fifth Embodiment

通过图14，说明本发明的无纺布的第五实施方式。A fifth embodiment of the nonwoven fabric of the present invention will be described with reference to FIG. 14 .

如图14所示，本实施方式的无纺布150形成有与在该无纺布150的一面侧形成的凸状部2在厚度方向(TD)的高度不同的第二凸状部22，这点与上述的第一实施方式不同。下面，以与第一实施方式的不同点为中心进行说明。As shown in FIG. 14 , the nonwoven fabric 150 of the present embodiment is formed with a second convex portion 22 having a height different from theconvex portion 2 formed on one side of the nonwoven fabric 150 in the thickness direction (TD). This point is different from the first embodiment described above. The following description will focus on differences from the first embodiment.

2.4.1无纺布2.4.1 Non-woven fabric

是在该无纺布150的一面侧并列地形成有多个槽部1的无纺布。然后，在大致等间隔地形成的多个槽部1各个之间形成多个凸状部2。另外，在隔着多个槽部1相邻的多个凸状部2各个之间，隔着多个槽部1各个，分别交互地形成多个第二凸状部22。换言之，分别隔着多个槽部1，交互并列地形成凸状部2和第二凸状部22。This nonwoven fabric 150 is a nonwoven fabric in which a plurality ofgrooves 1 are formed in parallel on one surface side. Then, a plurality ofconvex portions 2 are formed between each of the plurality ofgroove portions 1 formed at substantially equal intervals. In addition, a plurality of second convex portions 22 are alternately formed between each of the plurality ofconvex portions 2 adjacent to each other via the plurality ofgroove portions 1 via each of the plurality ofgroove portions 1 . In other words, theconvex portion 2 and the second convex portion 22 are alternately formed with the plurality ofgroove portions 1 interposed therebetween.

凸状部2以及第二凸状部22是纤维网100的没有被喷射主要由气体构成的流体的区域，是通过形成槽部1，成为相对地突出的区域的凸状部。第二凸状部22被形成为例如与凸状部2相比，该无纺布150的厚度方向(TD)的高度低，宽度方向(WD)的长度也小，但是，对于该第二凸状部22的纤维疏密、纤维定向以及纤维单位面积重量等，与凸状部2同样地形成。Theconvex portion 2 and the second convex portion 22 are regions of thefiber web 100 that are not sprayed with a fluid mainly composed of gas, and are convex portions that become relatively protruding regions by forming thegroove portion 1 . The second convex part 22 is formed such that, compared with theconvex part 2, the height of the thickness direction (TD) of the nonwoven fabric 150 is low, and the length of the width direction (WD) is also small. The fiber density, fiber orientation, fiber basis weight, etc. of the shaped portion 22 are formed in the same manner as theconvex portion 2 .

无纺布150的凸状部2以及第二凸状部22的配置是在并列地形成的多个槽部1各个之间，形成凸状部2以及第二凸状部22。然后，凸状部2以隔着槽部1与第二凸状部22相邻的方式被形成。另外，反之，第二凸状部22以隔着槽部1与凸状部2相邻的方式被形成。即，凸状部2和第二凸状部22隔着槽部1交互地形成。具体地说，是按照凸状部2、槽部1、第二凸状部22、槽部1、凸状部2这样的顺序反复形成。另外，凸状部2以及第二凸状部22的位置关系并不限定于此，可以是至少无纺布150的一部分以多个凸状部2隔着槽部1分别相邻的方式形成。另外，也可以是至少无纺布150的一部分以多个第二凸状部22隔着槽部1分别相邻的方式形成。The arrangement of theconvex portion 2 and the second convex portion 22 of the nonwoven fabric 150 is such that theconvex portion 2 and the second convex portion 22 are formed between each of the plurality ofgroove portions 1 formed in parallel. Then, theconvex portion 2 is formed adjacent to the second convex portion 22 via thegroove portion 1 . In addition, conversely, the second convex portion 22 is formed adjacent to theconvex portion 2 via thegroove portion 1 . That is, theconvex portion 2 and the second convex portion 22 are alternately formed with thegroove portion 1 interposed therebetween. Specifically, theconvex portion 2 , thegroove portion 1 , the second convex portion 22 , thegroove portion 1 , and theconvex portion 2 are repeatedly formed in this order. In addition, the positional relationship of theconvex part 2 and the 2nd convex part 22 is not limited to this, At least a part of the nonwoven fabric 150 may be formed so that severalconvex parts 2 may adjoin each other via thegroove part 1. In addition, at least a part of the nonwoven fabric 150 may be formed such that the plurality of second convex portions 22 are adjacent to each other via thegroove portion 1 .

2.4.2制造方法2.4.2 Manufacturing method

本实施方式的无纺布150的制造方法虽然与第一实施方式的记载相同，但是在无纺布150的制造中使用的无纺布制造装置90的喷出口913的样态不同。Although the manufacturing method of the nonwoven fabric 150 of this embodiment is the same as the description of 1st Embodiment, the aspect of thedischarge port 913 of the nonwovenfabric manufacturing apparatus 90 used for manufacture of the nonwoven fabric 150 differs.

通过一面向载置在网状支撑部件260的上面的纤维网100喷射主要由气体构成的流体，一面使之在规定方向移动，形成无纺布150。虽然在喷射主要由气体构成的流体时，形成槽部1、凸状部2以及第二凸状部22，但是，它们的形成可以根据无纺布制造装置90的主要由气体构成的流体的喷出口913的样态任意地进行变更。The nonwoven fabric 150 is formed by spraying a fluid mainly composed of gas toward thefiber web 100 placed on the upper surface of themesh support member 260 and moving it in a predetermined direction. Although thegroove portion 1, theconvex portion 2, and the second convex portion 22 are formed when the fluid mainly composed of gas is sprayed, they can be formed according to the spraying of the fluid mainly composed of gas in the nonwovenfabric manufacturing device 90. The state of theexit 913 is changed arbitrarily.

如图14所示，形成该无纺布150，可以例如通过调整喷射主要由气体构成的流体的喷出口913的间隔来进行。例如，通过使喷出口913的间隔比第一实施方式的喷出口913的间隔窄，能够形成与凸状部2相比，厚度方向(TD)的高度低的第二凸状部22。另外，通过使喷出913的间隔比第一实施方式的喷出口913的间隔宽，能够形成与凸状部2相比，厚度方向(TD)的高度高的凸状部。这样，通过在形成喷出口913的间隔，以窄的间隔和宽的间隔交互的方式配置喷出口913，形成凸状部2和第二凸状部22隔着槽部1交互地并列配置的该无纺布150。该喷出口913的间隔可根据想要形成的无纺布的凸状部2的高度以及第二凸状部22的排列，任意地形成。As shown in FIG. 14 , forming the nonwoven fabric 150 can be performed, for example, by adjusting the interval between theejection ports 913 ejecting a fluid mainly composed of gas. For example, by making the interval between theejection ports 913 narrower than that of theejection ports 913 in the first embodiment, it is possible to form the second convex portion 22 having a lower height in the thickness direction (TD) than theconvex portion 2 . In addition, by making the intervals of theejection ports 913 wider than the intervals of theejection ports 913 in the first embodiment, it is possible to form a convex portion having a height in the thickness direction (TD) higher than that of theconvex portion 2 . In this way, by arranging theejection ports 913 at intervals where theejection ports 913 are formed, narrow intervals and wide intervals are alternately arranged, so that theconvex portion 2 and the second convex portion 22 are alternately arranged side by side with thegroove portion 1 interposed therebetween. Non-woven fabric 150. The distance between thedischarge ports 913 can be arbitrarily formed according to the height of theconvex portion 2 of the nonwoven fabric to be formed and the arrangement of the second convex portions 22 .

本实施方式的无纺布150可以通过上述无纺布制造装置90制造。该无纺布制造装置90的无纺布150的制造方法等可以参考第一实施方式的无纺布110的制造方法以及无纺布制造装置90的说明的记载。The nonwoven fabric 150 of the present embodiment can be produced by the nonwovenfabric production apparatus 90 described above. For the manufacturing method of the nonwoven fabric 150 in the nonwovenfabric manufacturing apparatus 90 , reference can be made to the description of the manufacturing method of thenonwoven fabric 110 and the description of the nonwovenfabric manufacturing apparatus 90 in the first embodiment.

2.5第六实施方式2.5 Sixth Embodiment

通过图15、图16，说明本发明的无纺布的第六实施方式。A sixth embodiment of the nonwoven fabric of the present invention will be described with reference to FIGS. 15 and 16 .

如图15所示，本实施方式的无纺布160是形成有多个开口部3的无纺布。没有形成凸状部以及槽部，在开口部3的周围，调整纤维定向、纤维疏密以及纤维单位面积重量，这点与第一实施方式不同。下面，以不同点为中心进行说明。As shown in FIG. 15 , thenonwoven fabric 160 of this embodiment is a nonwoven fabric in which a plurality ofopenings 3 are formed. It differs from the first embodiment in that no convex portion and groove portion are formed, and fiber orientation, fiber density, and fiber basis weight are adjusted around theopening 3 . Hereinafter, the difference will be mainly explained.

2.5.1无纺布2.5.1 Non-woven fabric

如图15所示，本实施方式的无纺布160是形成有多个开口部3的无纺布。As shown in FIG. 15 , thenonwoven fabric 160 of this embodiment is a nonwoven fabric in which a plurality ofopenings 3 are formed.

沿作为向作为纤维集合体的纤维网100喷射例如主要由气体构成的流体的方向的该纤维网100的长度方向(LD)，大致等间隔地形成多个开口部3。另外，纤维网100的宽度方向(WD)的间隔也大致等间隔地形成多个开口部3。在这里，形成开口部3的间隔也可以是例如在长度方向(LD)在宽度方向(WD)都以不同的间隔形成。A plurality ofopenings 3 are formed at substantially equal intervals along the longitudinal direction (LD) of thefiber web 100 , which is a direction in which a fluid mainly composed of gas, for example, is sprayed onto thefiber web 100 as a fiber aggregate. In addition, a plurality ofopenings 3 are also formed at substantially equal intervals in the width direction (WD) of thefiber web 100 . Here, theopenings 3 may be formed at different intervals in the longitudinal direction (LD) and in the width direction (WD), for example.

该多个开口部3各个被形成为大致圆形或者大致椭圆形。然后，多个开口部3各个的纤维101以沿开口部3的周围的方式定向。即，开口部3的长度方向(LD)的端部在相对于该长度方向(LD)交叉的方向定向，另外，开口部3的长度方向(LD)的侧部以沿该长度方向(LD)的方式定向。Each of the plurality ofopenings 3 is formed in a substantially circular or substantially elliptical shape. Then, thefibers 101 of each of the plurality ofopenings 3 are oriented along the periphery of theopening 3 . That is, the ends of the longitudinal direction (LD) of theopening 3 are oriented in a direction intersecting with the longitudinal direction (LD), and the side portions of the longitudinal direction (LD) of theopening 3 are oriented along the longitudinal direction (LD). way of orientation.

另外，因为该多个开口部3的周围的纤维101通过喷射的主要由气体构成的流体在该开口部3的周围移动，所以，该开口部3的周围的纤维密度被调整为比其它的区域的纤维密度高。In addition, since thefibers 101 around the plurality ofopenings 3 are moved around theopenings 3 by the jetted fluid mainly composed of gas, the fiber density around theopenings 3 is adjusted to be higher than that in other regions. The fiber density is high.

然后，在该无纺布160的厚度方向(TD)，被形成为载置在支撑部件220(图16)上的面(下方)侧的纤维密度比与被载置的面相反侧的面(上面)侧的纤维密度高。这是因为由于重力或者喷射的主要由气体构成的流体的压力，在纤维网100中具有自由度的纤维101集中在支撑部件220侧。Then, in the thickness direction (TD) of thenonwoven fabric 160, the fiber density on the side (lower side) placed on the supporting member 220 (FIG. The fiber density on the top) side is high. This is because thefibers 101 having a degree of freedom in thefiber web 100 are concentrated on thesupport member 220 side due to gravity or the pressure of a jetted fluid mainly composed of gas.

2.5.2制造方法2.5.2 Manufacturing method

本实施方式的制造方法等虽然与上述的第一实施方式的制造方法相同，但是，在该无纺布160中，在没有形成槽部以及凸状部这点不同。下面，以不同点为中心进行说明。The manufacturing method etc. of this embodiment are the same as the manufacturing method of the said 1st Embodiment, However, Thisnonwoven fabric 160 differs in the point that a groove part and a convex-shaped part are not formed. Hereinafter, the difference will be mainly explained.

用于形成图15所示的无纺布160的通气性支撑部件例如能够举例表示出图16所示那样的支撑部件220。即，是在图4的网状支撑部件210的上面，以规定间隔大致平行地配置着多个细长状部件225的支撑部件。细长状部件225是不通气性的部件，例如，不使从上方侧喷射的主要由气体构成的流体向下方侧通气。然后，喷射到细长状部件225的主要由气体构成的流体其流动方向被变更。As an air-permeable supporting member for forming thenonwoven fabric 160 shown in FIG. 15 , for example, a supportingmember 220 as shown in FIG. 16 can be exemplified. That is, it is a support member in which a plurality ofelongated members 225 are arranged approximately in parallel at predetermined intervals on the upper surface of themesh support member 210 in FIG. 4 . Theelongated member 225 is an air-impermeable member, for example, does not ventilate the fluid mainly composed of gas injected from the upper side to the lower side. Then, the flow direction of the fluid mainly composed of gas sprayed onto theelongated member 225 is changed.

然后，可以将纤维网100载置在支撑部件220上，使支撑着纤维网100的状态下的支撑部件220在规定方向移动，从移动的纤维网100的上面侧连续地喷射气体，以此，制造该无纺布160。Then, thefiber web 100 can be placed on thesupport member 220, thesupport member 220 in the state of supporting thefiber web 100 can be moved in a predetermined direction, and the gas can be continuously injected from the upper side of the movingfiber web 100, thereby, Thisnonwoven fabric 160 is produced.

具体地说，通过连续地喷射主要由气体构成的流体，没有形成第一实施方式的槽部以及凸状部，而是通过喷射的主要由气体构成的流体以及/或者喷射的主要由气体构成的流体，也就是在纤维网100通气，同时，被细长状部件225改变了流动的方向的主要由气体构成的流体，形成开口部3。Specifically, by continuously injecting a fluid mainly composed of gas, the grooves and protrusions of the first embodiment are not formed, but the injected fluid mainly composed of gas and/or the injected fluid mainly composed of gas The fluid, that is, the fluid mainly composed of gas whose flow direction is changed by theelongated member 225 while passing through thefiber web 100 , forms theopening 3 .

另外，喷射到该无纺布160的主要由气体构成的流体的量只要是喷射主要由气体构成的流体的区域的纤维网100的纤维101能够移动的程度即可。在该情况下，也可以不通过将喷射的主要由气体构成的流体引入支撑部件220的下侧的吸气部915进行吸引(吸气)。为了不使因飞回到支撑部件220的主要由气体构成的流体，扰乱成型的纤维网100的形状，好的是从支撑部件220的下方吸引(吸气)。吸引(吸气)主要由气体构成的流体的量好的是纤维网100没有被推向支撑部件220(没有被压溃)的程度的量。In addition, the amount of the fluid mainly composed of gas sprayed onto thenonwoven fabric 160 may be such that thefibers 101 of thefiber web 100 in the region where the fluid mainly composed of gas is sprayed can move. In this case, suction (suction) may not be performed by introducing the ejected fluid mainly composed of gas into the suction part 915 on the lower side of thesupport member 220 . In order not to disturb the shape of the moldedfiber web 100 by the fluid mainly composed of gas flying back to thesupport member 220 , it is preferable to suck (inhale) from below thesupport member 220 . It is good to suck (inhale) the fluid mainly composed of gas to such an extent that thefiber web 100 is not pushed toward the supporting member 220 (not crushed).

另外，除了上述那样仅形成开口部3的情况外，还可以在喷射主要由气体构成的流体，与开口部3一起形成凹凸后，卷绕到辊等，压溃凹凸。In addition to the case where only theopening 3 is formed as described above, it is also possible to spray a fluid mainly composed of gas to form the unevenness together with theopening 3, and then wind it on a roll or the like to crush the unevenness.

另外，作为其它的制造方法，作为支撑部件，可以使用不具有通气部的板状的盘。具体地说，将纤维网100载置在板状的盘上，一面使支撑着纤维网100的状态的该支撑部件在规定方向移动，一面间歇地喷射主要由气体构成的流体，以此，制造该无纺布160。In addition, as another manufacturing method, a plate-shaped disk having no vent portion can be used as the supporting member. Specifically, thefiber web 100 is placed on a plate-shaped tray, and while the support member supporting thefiber web 100 is moved in a predetermined direction, a fluid mainly composed of gas is intermittently sprayed, thereby manufacturing Thenon-woven fabric 160.

因为该板状的盘的整体成为不通气部，所以，间歇地喷射的主要由气体构成的流体与其流动方向被变更了的主要由气体构成的流体一起形成开口部3。换言之，在被喷射了主要由气体构成的流体的部分形成开口部3。Since the whole of the plate-shaped disk becomes an air-impermeable portion, the intermittently injected fluid mainly composed of gas forms theopening 3 together with the fluid mainly composed of gas whose flow direction is changed. In other words, theopening 3 is formed at the portion where the fluid mainly composed of gas is sprayed.

本实施方式的无纺布160可以通过上述的无纺布制造装置90制造。该无纺布制造装置90的无纺布160的制造方法等可以参考第一实施方式的无纺布110的制造方法以及无纺布制造装置90的说明的记载。Thenonwoven fabric 160 of this embodiment can be manufactured by the above-mentioned nonwovenfabric manufacturing apparatus 90 . For the manufacturing method of thenonwoven fabric 160 of the nonwovenfabric manufacturing apparatus 90 , etc., reference can be made to the description of the manufacturing method of thenonwoven fabric 110 and the description of the nonwovenfabric manufacturing apparatus 90 of the first embodiment.

3实施例3 examples

3.1第一实施例3.1 The first embodiment

[纤维构成][fiber constitution]

使用高密度聚乙烯和聚对苯二甲酸乙二醇酯的心鞘构造、平均纤度3.3dtex、平均纤维长51mm、涂层有亲水油剂的纤维A和与纤维A的不同之处在于涂层是拒水油剂的纤维B的混棉。使用纤维A和纤维B的混合比为70∶30，纤维单位面积重量被调整为40g/m²的纤维集合体。The core-sheath structure of high-density polyethylene and polyethylene terephthalate, the average fineness of 3.3dtex, the average fiber length of 51mm, and the fiber A coated with a hydrophilic oil agent are different from fiber A in that the coating The layer is a blend of fiber B of the water and oil repellent. The mixing ratio of fiber A and fiber B was 70:30, and the fiber aggregate was adjusted to a fiber basis weight of 40 g/m² .

[制造条件][manufacturing conditions]

以直径为1.0mm，间距为6.0mm形成多个图9的喷出口913。另外，喷出口913的形状为正圆，喷出部910的与喷出口913连通的主要由气体构成的流体所通过的通气管的截面形状为圆筒型。喷出部910的宽度为500mm。以温度为80℃，风量为600l/分的条件，向上述结构的纤维网喷射热风。A plurality ofejection ports 913 in FIG. 9 are formed with a diameter of 1.0 mm and a pitch of 6.0 mm. In addition, the shape of thedischarge port 913 is a perfect circle, and the cross-sectional shape of the vent pipe through which the fluid mainly composed of gas communicated with thedischarge port 913 of thedischarge unit 910 passes is cylindrical. The width of thedischarge part 910 was 500 mm. With a temperature of 80° C. and an air volume of 600 l/min, hot air was sprayed onto the fiber web having the above structure.

以前面所示的纤维结构，通过速度为20m/分的梳棉机进行开纤，作成纤维网，将纤维网切割成宽度为450mm。然后，以3m/分的速度，将纤维网向20筛孔的通气性网上运送。另外，按照基于前面所示的喷出部910以及喷出口913的制造条件，向纤维网喷射热风，另一方面，以比喷射的热风量少的吸收量，从通气性网的下方进行吸引(吸气)。然后，在通过通气性网运送的状态下，在按照温度为130℃，热风风量为10Hz设定的烘炉内运送大约30秒。With the fiber structure shown above, a carding machine with a speed of 20 m/min is used to open fibers to form a fiber web, and the fiber web is cut into a width of 450 mm. Then, at a speed of 3 m/min, the fiber web was conveyed onto a 20-mesh air-permeable net. In addition, according to the manufacturing conditions based on theejection part 910 and theejection port 913 shown above, hot air is sprayed to the fiber web, and on the other hand, suction is performed from below the air-permeable net with an absorption amount less than the amount of hot air sprayed ( inhale). Then, in the state of being conveyed through the air-permeable net, it was conveyed for about 30 seconds in an oven set at a temperature of 130° C. and a hot air volume of 10 Hz.

[结果][result]

·中央部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为68∶22，纤维单位面积重量为48g/m²，厚度为3.5mm，纤维密度为0.01g/cm³，每一个该中央部的宽度为2.5mm，间距为6.1mm。Central part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 68:22, the fiber basis weight is 48 g/m² , the thickness is 3.5 mm, and the fiber density is 0.01 g /cm³ , the width of each of the central parts is 2.5 mm, and the pitch is 6.1 mm.

·横定向部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为35∶65，纤维单位面积重量为37g/m²，厚度为3.4mm，纤维密度为0.01g/cm³，每一个该横定向部的宽度为1.4mm，间距为6.1mm。·Laterally oriented portion: the ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 35:65, the fiber basis weight is 37g/m² , the thickness is 3.4mm, and the fiber density is 0.01 g/cm³ , the width of each transversely oriented portion is 1.4 mm, and the pitch is 6.1 mm.

·纵定向部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为72∶28，纤维单位面积重量为49g/m²，厚度为3.5mm，纤维密度为0.01g/cm³，每一个该纵定向部的宽度为1.1mm，间距为3.6mm。・Longitudinal orientation section: the ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 72:28, the fiber basis weight is 49 g/m² , the thickness is 3.5 mm, and the fiber density is 0.01 g/cm³ , the width of each longitudinally oriented portion is 1.1 mm, and the pitch is 3.6 mm.

·形状：在中央部的两侧形成纵定向部。然后，中央部、纵定向部以及横定向部以沿长度方向(LD)连续地延伸的方式形成，在宽度方向(WD)相互反复地形成。另外，以从该无纺布的表面侧朝向里面，纤维密度逐渐提高的方式被形成。特别是纵定向部的纤维定向作为主体朝向长度方向(LD)。然后，该无纺布的厚度方向(TD)的高度形成为大致一定。• Shape: Vertically oriented portions are formed on both sides of the central portion. Then, the central portion, the longitudinally oriented portion, and the laterally oriented portion are formed so as to extend continuously in the longitudinal direction (LD), and are formed repeatedly in the width direction (WD). In addition, the nonwoven fabric is formed such that the fiber density gradually increases from the front side toward the back. In particular the fiber orientation of the longitudinally oriented portion is directed as the main body in the length direction (LD). Then, the height in the thickness direction (TD) of this nonwoven fabric is formed substantially constant.

3.2第二实施例3.2 The second embodiment

[纤维构成][fiber constitution]

纤维构成与第一实施例相同。The fiber constitution is the same as that of the first embodiment.

[制造条件][manufacturing conditions]

以前面所示的喷出部910以及喷出口913的设计，以温度为105℃，风量为1000l/分的条件喷射热风，另一方面，以与热风量大致相同或者稍多的吸收量，从通气性网的下方进行吸引(吸气)。With the design of theejection part 910 and theejection port 913 shown above, the temperature is 105°C, and the air volume is 1000 l/min to spray hot air. Suction (suction) is performed under the air-permeable net.

[结果][result]

·中央部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为73∶27，纤维单位面积重量为48g/m²，厚度为3.5mm，纤维密度为0.02g/cm³，每一个该中央部的宽度为2.5mm，间距为6.1mm。Central part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 73:27, the fiber basis weight is 48 g/m² , the thickness is 3.5 mm, and the fiber density is 0.02 g /cm³ , the width of each of the central parts is 2.5 mm, and the pitch is 6.1 mm.

·槽部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为29∶71，纤维单位面积重量为17g/m²，厚度为1.8mm，纤维密度为0.009g/cm³，每一个该槽部的宽度为1.4mm，间距为6.1mm。Groove: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 29:71, the fiber basis weight is 17 g/m² , the thickness is 1.8 mm, and the fiber density is 0.009 g /cm³ , the width of each of the grooves is 1.4 mm, and the pitch is 6.1 mm.

·侧部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为81∶19，纤维单位面积重量为49g/m²，厚度为3.2mm，纤维密度为0.03g/cm³，每一个该侧部的宽度为1.1mm，间距为3.6mm。Side part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 81:19, the fiber basis weight is 49 g/m² , the thickness is 3.2 mm, and the fiber density is 0.03 g /cm³ , the width of each side is 1.1 mm, and the pitch is 3.6 mm.

·形状：在中央部的两侧形成侧部，另外，通过中央部以及侧部，形成凸状部。另外，沿凸状部形成槽部。然后，凸状部和槽部都是以沿长度方向(LD)延伸的方式形成，在宽度方向(WD)相互反复地形成。再有，从该无纺布的表面侧朝向里面侧，纤维密度逐渐提高，槽部的纤维定向被形成为作为主体朝向长度方向(LD)。• Shape: side portions are formed on both sides of the central portion, and a convex portion is formed through the central portion and the side portions. In addition, a groove portion is formed along the convex portion. Then, both the convex portion and the groove portion are formed so as to extend in the longitudinal direction (LD), and are formed repeatedly in the width direction (WD). In addition, the fiber density gradually increases from the front side to the back side of the nonwoven fabric, and the fiber orientation of the groove portion is formed mainly in the longitudinal direction (LD).

3.3第三实施例3.3 The third embodiment

[纤维构成][fiber constitution]

纤维构成与第一实施例相同。The fiber constitution is the same as that of the first embodiment.

[制造条件][manufacturing conditions]

在通过前面所示的通气性网支撑着通过前面所示的纤维结构所形成的纤维网的状态下，以向设定是温度为130℃、热风风量为10Hz的烘炉内运送大约30秒钟。然后，在刚刚从烘炉内运出后(大约两秒以后)，使用前面所示的喷出部910以及喷出口913，以温度为120℃，风量为2200l/分的条件，喷射热风。In the state where the fiber web formed by the fiber structure shown above is supported by the air-permeable net shown above, it is transported into an oven set at a temperature of 130°C and a hot air volume of 10 Hz for about 30 seconds. . Then, just after being transported out from the oven (after about two seconds), hot air is jetted using the jettingpart 910 and the jettingport 913 shown above at a temperature of 120° C. and an air volume of 2200 l/min.

[结果][result]

·中央部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为64∶36，纤维单位面积重量为37g/m²，厚度为3.3mm，纤维密度为0.01g/cm³，每一个该中央部的宽度为1.9mm，间距为6.1mm。Central part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 64:36, the fiber basis weight is 37 g/m² , the thickness is 3.3 mm, and the fiber density is 0.01 g /cm³ , the width of each central portion is 1.9 mm, and the pitch is 6.1 mm.

·槽部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为32∶71，纤维单位面积重量为23g/m²，厚度为1.1mm，纤维密度为0.02g/cm³，每一个该槽部的宽度为2.1mm，间距为6.1mm。Groove: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 32:71, the fiber basis weight is 23 g/m² , the thickness is 1.1 mm, and the fiber density is 0.02 g /cm³ , the width of each of the grooves is 2.1 mm, and the pitch is 6.1 mm.

·侧部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为72∶28，纤维单位面积重量为39g/m²，厚度为3.2mm，纤维密度为0.01g/cm³，每一个该侧部的宽度为1.5mm，间距为3.6mm。Side part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 72:28, the fiber basis weight is 39 g/m² , the thickness is 3.2 mm, and the fiber density is 0.01 g /cm³ , the width of each side is 1.5 mm, and the pitch is 3.6 mm.

·形状：形成了凸状部以及槽部。- Shape: a convex part and a groove part are formed.

3.4第四实施例3.4 The fourth embodiment

[纤维构成][fiber constitution]

纤维构成与第一实施例相同。The fiber constitution is the same as that of the first embodiment.

[制造条件][manufacturing conditions]

以前面所示的喷出部910以及喷出口913的设计，以温度为80℃，风量为1800l/分的条件，喷射空气流。然后，通过以长度方向(LD)为5mm的间距以及宽度方向(WD)为5mm的间距，配置成锯齿状的针，以200次/分，沿着长度方向(LD)朝向的方向，速度为3m/分，对前面所示的纤维构成的纤维网进行针刺，使纤维彼此半交络。然后，以前面所示的喷出部910以及喷出口913的制造条件，喷射空气流。另外，同时以与热风量大致相等或者稍多的吸收量，从通气性网的下方进行吸引(吸气)。With the design of thedischarge part 910 and thedischarge port 913 shown above, the air flow was injected under the conditions of a temperature of 80° C. and an air volume of 1800 l/min. Then, through the pitch of 5 mm in the length direction (LD) and the pitch of 5 mm in the width direction (WD), the needles are arranged in a zigzag shape, at 200 times/min, along the direction of the length direction (LD), the speed is The fiber web made of the above-mentioned fibers was needle-punched at 3 m/min to semi-entangle the fibers. Then, the air flow is jetted under the manufacturing conditions of the jettingpart 910 and the jettingport 913 described above. In addition, at the same time, suction (suction) is performed from below the air-permeable net with an absorption amount approximately equal to or slightly greater than the amount of hot air.

[结果][result]

·中央部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为69∶31，纤维单位面积重量为45g/m²，厚度为2.5mm，纤维密度为0.02g/cm³，每一个该中央部的宽度为2.4mm，间距为5.7mm。Central part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 69:31, the fiber basis weight is 45 g/m² , the thickness is 2.5 mm, and the fiber density is 0.02 g /cm³ , the width of each of the central portions is 2.4 mm, and the pitch is 5.7 mm.

·槽部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为35∶65，纤维单位面积重量为27g/m²，厚度为1.9mm，纤维密度为0.01g/cm³，每一个该槽部的宽度为1.0mm，间距为5.7mm。Groove: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 35:65, the fiber basis weight is 27 g/m² , the thickness is 1.9 mm, and the fiber density is 0.01 g /cm³ , the width of each of the grooves is 1.0 mm, and the pitch is 5.7 mm.

·侧部：在长度方向(LD)定向的纤维和在宽度方向(WD)定向的纤维的比率为75∶25，纤维单位面积重量为45g/m²，厚度为2.3mm，纤维密度为0.02g/cm³，每一个该侧部的宽度为0.8mm，间距为4.0mm。Side part: The ratio of fibers oriented in the length direction (LD) to fibers oriented in the width direction (WD) is 75:25, the fiber basis weight is 45 g/m² , the thickness is 2.3 mm, and the fiber density is 0.02 g /cm³ , the width of each side is 0.8 mm, and the pitch is 4.0 mm.

·形状：凸状部和槽部以沿长度方向(LD)延伸的方式连续地形成。另外，该凸状部以及槽部具有部分地朝向下方的交络点，在宽度方向(WD)相互反复地被形成。·Shape: The convex portion and the groove portion are continuously formed so as to extend in the longitudinal direction (LD). In addition, the convex portion and the groove portion have intersecting points partially directed downward, and are formed repeatedly in the width direction (WD).

4使用例4 use cases

作为本发明的无纺布的用途，例如能够举例表示出生理用卫生巾、衬垫、尿布等的吸收性物品的表面片等。在该情况下，虽然凸状部为肌肤面侧、里面侧哪个均可，但是，因为通过为肌肤面侧，可以降低与肌肤的接触面积，所以，有难以感觉到体液造成的潮湿感的情况。另外，也可以作为吸收性物品的表面片和吸收体之间的中间片使用。因为与表面片或者吸收体的接触面积降低，所以，存在难以从吸收体退回的情况。另外，由于与肌肤的接触面积降低、有缓冲感，所以也可以用在吸收性物品的侧片、尿布的外面(外背面)、粘扣带的雌部件等中。另外，可以用在用于除去附着在地面、身体上的垃圾、污垢的擦拭器、面罩、乳垫等多个方面。Examples of uses of the nonwoven fabric of the present invention include surface sheets of absorbent articles such as sanitary napkins, liners, and diapers. In this case, although the convex portion may be on the skin side or the back side, since the contact area with the skin can be reduced by being on the skin side, it may be difficult to feel the moist feeling caused by body fluids. . Moreover, it can also be used as an intermediate|middle sheet between the top sheet of an absorbent article, and an absorber. Since the contact area with the topsheet or the absorber decreases, it may be difficult to return from the absorber. In addition, since the contact area with the skin is reduced and a cushioning feeling is provided, it can also be used in side panels of absorbent articles, the outer surface (outer back surface) of diapers, female parts of hook and loop fasteners, and the like. In addition, it can be used in various fields such as wipers, face masks, and breast pads for removing garbage and dirt adhering to the floor and the body.

5各构成物5 components

下面，对各构成物进行详细叙述。Next, each constituent will be described in detail.

5.1与无纺布相关5.1 Related to non-woven fabrics

5.1.1纤维集合体5.1.1 Fiber aggregates

纤维集合体是被形成为大致片状的纤维集合体，是构成该纤维集合体的纤维具有自由度的状态的纤维集合体。换言之，是具有纤维彼此的自由度的纤维集合体。这里，纤维彼此的自由度是指构成作为纤维集合体的纤维网的纤维能够通过主要由气体构成的流体自由移动的程度。该纤维集合体例如能够通过喷出混合了多个纤维的混合纤维，形成规定厚度的纤维层来形成。另外，例如，可以通过喷出多个不同的纤维各个，分多次叠层形成纤维层来形成。A fiber aggregate is a fiber aggregate formed into a substantially sheet shape, and is a fiber aggregate in a state where fibers constituting the fiber aggregate have degrees of freedom. In other words, it is a fiber aggregate having degrees of freedom between fibers. Here, the degree of freedom between fibers refers to the degree to which fibers constituting a fiber web as a fiber aggregate can freely move through a fluid mainly composed of gas. This fiber aggregate can be formed, for example, by spraying mixed fibers mixed with a plurality of fibers to form a fiber layer of a predetermined thickness. Alternatively, for example, a plurality of different fibers may be ejected to form a fiber layer by laminating multiple times.

作为本发明的纤维集合体，例如能够举例表示出通过梳棉法形成的纤维网，或者被热熔接，在纤维彼此的热熔接固化以前的纤维网。另外，能够举例表示出通过气流法形成的网，或者被热熔接，在纤维彼此的热熔接固化以前的纤维网。另外，能够举例表示出通过点粘法被压花的热熔接固化以前的纤维网。另外，能够举例表示出通过纺粘法，纺纱被压花以前的纤维集合体，或者被压花的热熔接固化以前的纤维集合体。另外，能够举例表示出通过针刺法形成的半交络的纤维网。另外，能够举例表示出通过水刺法形成的半交络的纤维网。另外，能够举例表示出通过熔喷法纺纱，在纤维彼此的热熔接固化以前的纤维集合体。另外，能够举例表示出通过溶剂粘接法形成的由于溶剂，纤维彼此固化以前的纤维集合体。As the fiber aggregate of the present invention, for example, a fiber web formed by a carding method, or a fiber web before heat welding and solidification of fibers can be exemplified. In addition, a web formed by an air-flow method or a fiber web before thermal fusion of fibers is solidified can be exemplified. In addition, a fiber web before thermal fusion solidification embossed by a point bonding method can be exemplified. In addition, a fiber assembly before embossing of the spun yarn by the spunbond method, or a fiber assembly before embossed heat-sealing and solidification can be exemplified. In addition, a semi-entangled fiber web formed by a needle punching method can be exemplified. In addition, a semi-entangled fiber web formed by hydroentanglement can be exemplified. In addition, an example of a fiber aggregate before the fibers are thermally welded and solidified by spinning by the melt-blown method can be exemplified. In addition, a fiber aggregate before the fibers are solidified with a solvent by a solvent bonding method can be exemplified.

另外，通过空气(气体)流，对纤维容易进行再排列的纤维集合体好的是通过使用比较长的纤维的梳棉法所形成的纤维网，再有，能够举例表示出纤维彼此的自由度高，仅通过交络形成的热熔接以前的网。另外，为了在通过多个空气(气体)流，形成槽部(凹凸)等后，在保持其形状的状态下，使之无纺布化，好的是使用通过用规定的加热装置等进行烘炉处理(加热处理)，使纤维集合体所含有的热可塑性纤维热熔接的热风穿透法。In addition, fiber aggregates that are easy to rearrange fibers by air (gas) flow are preferably fiber webs formed by carding using relatively long fibers. Furthermore, the degree of freedom between fibers can be exemplified High, the previous mesh is welded only by heat fusion formed by intertwining. In addition, in order to make it into a non-woven fabric while maintaining its shape after forming grooves (concave-convex) etc. by passing through a plurality of air (gas) flows, it is preferable to use a prescribed heating device or the like for drying. Furnace treatment (heat treatment), a hot air penetration method in which thermoplastic fibers contained in a fiber aggregate are thermally welded.

5.1.2纤维5.1.2 Fiber

作为构成纤维集合体的纤维(例如，构成图1所示的纤维网100的纤维101)，例如能够例举出低密度聚乙烯、高密度聚乙烯、直链状聚乙烯、聚丙烯、聚对苯二甲酸乙二醇酯、改性聚丙烯、改性聚对苯二甲酸乙二醇酯、尼龙、聚酰胺等的热可塑性树脂，可以例举出这些各树脂的单独或者复合的纤维。As the fibers (for example, thefibers 101 constituting thefiber web 100 shown in FIG. Examples of thermoplastic resins such as ethylene phthalate, modified polypropylene, modified polyethylene terephthalate, nylon, and polyamide include individual or composite fibers of these resins.

在将纤维复合的情况下的复合形状，例如能够例举出芯成分的熔点比鞘成分高的芯鞘式、芯鞘的偏芯式、左右成分的熔点不同的并列式。另外，也可以是中空式、扁平、Y型、C型等的异型的复合形状。另外，也可以在构成纤维集合体的纤维中，混合潜在卷缩、显在卷缩的立体卷缩纤维、通过水流、热、压花等的物理的负载分割的分割纤维等。The composite shape when fibers are composited includes, for example, a core-sheath type in which the melting point of the core component is higher than that of the sheath component, an eccentric type of core-sheath type, and a side-by-side type in which the melting points of the left and right components are different. In addition, it may be a hollow, flat, Y-shaped, C-shaped or other special-shaped composite shape. In addition, latently crimped or significantly crimped three-dimensionally crimped fibers, split fibers split by physical loads such as water flow, heat, and embossing may be mixed with the fibers constituting the fiber aggregate.

另外，为了形成三维卷缩形状，可以配合规定的显在卷缩纤维、潜在卷缩纤维。这里，三维卷缩形状是指螺旋状·锯齿状·Ω状等的形状，即使纤维定向主体地朝向平面方向，纤维定向也部分地朝向厚度方向。据此，因为纤维本身的屈曲强度向厚度方向作用，所以，即使施加了外压，高度也难以压坏。再有，其中在纤维为螺旋状的形状的情况下，因为在释放了外压时，形状想要复原，所以，即使由于过剩的外压，高度稍微被压坏，在外压释放后，也容易恢复到原来的厚度。In addition, in order to form a three-dimensional crimped shape, predetermined apparent crimped fibers and latent crimped fibers may be blended. Here, the three-dimensional crimped shape refers to a shape such as a helical shape, a zigzag shape, or an omega shape, and even if the fiber orientation is mainly oriented in the planar direction, the fiber orientation is partially oriented in the thickness direction. According to this, since the buckling strength of the fiber itself acts in the thickness direction, even if an external pressure is applied, the height is hardly crushed. Furthermore, in the case where the fiber is in a helical shape, since the shape tends to recover when the external pressure is released, even if the height is slightly crushed due to excessive external pressure, it is easy to recover after the external pressure is released. return to its original thickness.

显在卷缩纤维是通过机械卷缩付与形状，芯鞘构造为以偏芯式、并列式等预先被卷缩的纤维的总称。潜在卷缩纤维是通过加热，显现卷缩的纤维。Significantly crimped fiber is a general term for fibers crimped in advance in a core-sheath structure such as an eccentric type or a side-by-side type to impart a shape by mechanical crimping. Latent crimped fibers are fibers that appear crimped by heating.

机械卷缩是针对纺纱后的连续直线状的纤维，能够通过线速度的周速差·热·加压，控制卷缩的显现的卷缩，每个单位长度的卷缩个数越多，越能提高相对于外压下的屈曲强度。例如，卷缩个数好的是10到35个/inch，更好的是15到30个/inch的范围。Mechanical crimping is for the continuous linear fibers after spinning. The crimping can be controlled by the peripheral velocity difference, heat and pressure of the line speed. The more crimps per unit length, the more crimps per unit length. The buckling strength against external pressure can be improved more. For example, the number of crimps is preferably 10 to 35/inch, more preferably 15 to 30/inch.

被付与了基于热收缩的形状的纤维由熔点不同的两个以上的树脂构成，因为若加热，则由于熔点差，热收缩率变化，所以，是三维卷缩的纤维的情况。纤维截面的复合形状能够例举出芯鞘构造的偏芯式、左右成分的熔点不同的并列式。这样的纤维的热收缩率作为好的值，例如可以举例表示出5到90％，更好的是10到80％的范围。The fiber given a shape due to heat shrinkage is composed of two or more resins with different melting points, and when heated, the heat shrinkage rate changes due to the difference in melting point, so it is a case of three-dimensionally crimped fiber. The composite shape of the fiber cross section can be exemplified by an eccentric type of core-sheath structure and a side-by-side type in which the left and right components have different melting points. The thermal shrinkage rate of such fibers can be, for example, 5 to 90%, more preferably in the range of 10 to 80%, as a good value.

热收缩率的测定方法是：(1)作成测定的纤维为100％，200g/m²的网，(2)制作切割为250×250mm的大小的样品，(3)将该样品放置在145℃(418.15k)的烘炉内5分钟，(4)测定收缩后的长度尺寸，(5)可以从热收缩前后的长度尺寸差算出。The method of measuring the heat shrinkage rate is: (1) make the measured fiber as 100%, 200g/^m2 mesh, (2) make a sample cut into the size of 250×250mm, (3) place the sample at 145°C (418.15k) in the oven for 5 minutes, (4) measure the length dimension after shrinkage, (5) can be calculated from the length dimension difference before and after heat shrinkage.

在将本无纺布作为表面片使用的情况下，若考虑例如液体的进入、肌肤触感，则纤度在1.1到8.8dtex的范围为好。When this nonwoven fabric is used as a surface sheet, the fineness is preferably in the range of 1.1 to 8.8 dtex in consideration of, for example, the penetration of liquid and the feeling on the skin.

在将本无纺布作为表面片使用的情况下，作为构成纤维集合体的纤维，例如为了吸收残留在肌肤那样的少量的经血、汗等，也可以含有浆料、化学浆料、人造纤维、醋酸纤维素、天然棉等的纤维素类的液亲水性纤维。但是，因为纤维素类纤维难以排出一次吸收的液体，所以，作为好的样态，可以举例表示出例如相对于整体，混入0.1到5质量％的范围的情况。When using this nonwoven fabric as a surface sheet, as the fibers constituting the fiber assembly, for example, in order to absorb a small amount of menstrual blood and sweat remaining on the skin, pulp, chemical pulp, rayon, Cellulosic liquid hydrophilic fibers such as cellulose acetate and natural cotton. However, since cellulose-based fibers are difficult to discharge the liquid absorbed once, as a good form, for example, a case where the range of 0.1 to 5% by mass is mixed with respect to the whole can be exemplified.

在将本无纺布作为表面片使用的情况下，例如考虑液体的进入性、背面再湿，也可以在上述举例的疏水性合成纤维中揉合亲水剂、拒水剂等，或者进行涂层等。另外，也可以通过电晕处理、等离子处理，付与亲水性。另外，也可以含有拒水性纤维。这里，拒水性纤维是指进行了已知的拒水处理的纤维。In the case of using this nonwoven fabric as a surface sheet, for example, in consideration of liquid penetration and backside rewetting, it is also possible to knead a hydrophilic agent, a water-repellent agent, etc. in the above-mentioned hydrophobic synthetic fibers, or to coat them. layers etc. In addition, hydrophilicity can also be imparted by corona treatment or plasma treatment. In addition, water-repellent fibers may also be contained. Here, the water-repellent fiber refers to a fiber subjected to a known water-repellent treatment.

另外，为了提高增白性，也可以含有例如，氧化钛、硫酸钡、碳酸钙等的无机填充剂。在为芯鞘式的复合纤维的情况下，可以仅含在芯中，还可以含在鞘中。In addition, inorganic fillers such as titanium oxide, barium sulfate, and calcium carbonate may be contained in order to improve whitening properties. In the case of a core-sheath type conjugate fiber, it may be contained only in the core or may be contained in the sheath.

另外，如前面所示那样，通过空气流，对纤维容易进行再排列的是通过使用比较长的纤维的梳棉法形成的纤维网，为了在通过多个空气流，形成槽部(凹凸化)等后，在保持其形状的状态下，使之无纺布化，好的是通过烘炉处理(加热处理)，使热可塑性纤维热熔接的热风穿透法。作为适合该制法的纤维，为了使纤维彼此的交点热熔接，好的是使用芯鞘构造、并列构造的纤维，更好的是由鞘彼此容易切实地热熔接的芯鞘构造的纤维构成。特别是好的是使用由聚对苯二甲酸乙二醇酯和聚乙烯构成的芯鞘复合纤维、由聚丙烯和聚乙烯构成的芯鞘复合纤维。这些纤维可以单独或者将两种以上进行组合来使用。另外，纤维长好的是20到100mm，特别好的是35到65mm。In addition, as mentioned above, it is easy to rearrange the fibers by the air flow is the fiber web formed by the carding method using relatively long fibers, in order to form grooves (convex and convex) After that, it is made into a non-woven fabric while maintaining its shape, and it is preferable to use an oven treatment (heat treatment) to heat-weld thermoplastic fibers through a hot air method. As fibers suitable for this production method, fibers having a core-sheath structure or a side-by-side structure are preferably used in order to thermally fuse the intersection points of the fibers, and fibers having a core-sheath structure in which the sheaths are easily and reliably thermally welded are more preferable. In particular, it is preferable to use a core-sheath composite fiber composed of polyethylene terephthalate and polyethylene, or a core-sheath composite fiber composed of polypropylene and polyethylene. These fibers can be used alone or in combination of two or more. In addition, the fiber length is preferably 20 to 100 mm, particularly preferably 35 to 65 mm.

5.2与无纺布制造装置相关5.2 Related to non-woven fabric manufacturing equipment

5.2.1主要由气体构成的流体5.2.1 Fluids mainly composed of gases

本发明的主要由气体构成的流体例如能够举例表示出被调整为常温或者规定温度的气体或者在该气体中含有固体或者液体的微粒子的气悬体。The fluid mainly composed of gas in the present invention can be, for example, a gas adjusted to normal temperature or a predetermined temperature, or an aerosol containing fine particles of solid or liquid in the gas.

作为气体，例如能够举例表示出空气、氮气等。另外，气体也包括水蒸气等的液体的蒸汽。As gas, air, nitrogen, etc. can be illustrated, for example. In addition, the gas also includes liquid vapor such as water vapor.

气悬体是气体中分散有液体或者固体的物质，下面列举例子。例如，能够举例表示出分散有用于着色的墨、用于提高柔软性的硅等的柔软剂、用于防止带电以及控制湿润性的亲水性或者拒水性的活性剂、用于提高流体的能的氧化钛、硫酸钡等的无机填充剂、用于提高流体的能，同时在加热处理中，用于提高凹凸成型维持性的聚乙烯等的粉状粘结剂、用于止痒的盐酸苯海拉明、异丙基甲基酚等的抗组胺剂、保湿剂、杀菌剂等的气悬体。这里，固体包括凝胶状的物质。An aerosol is a substance in which a liquid or a solid is dispersed in a gas, examples of which are listed below. For example, ink for coloring, a softener such as silicon for improving flexibility, a hydrophilic or water-repellent active agent for preventing electrification and controlling wettability, and an active agent for improving fluid performance can be exemplified. Inorganic fillers such as titanium oxide and barium sulfate, powdered binders such as polyethylene for improving the performance of fluids and improving the maintenance of concave-convex molding during heat treatment, and benzene hydrochloride for antiitching Aerosols of antihistamines such as diphenhydramine and isopropylmethylphenol, moisturizers, and fungicides. Here, solid includes gel-like substances.

主要由气体构成的流体的温度可以恰当地调整。能够根据构成纤维集合体的纤维的性质、欲制造的无纺布的形状，恰当地进行调整。The temperature of the fluid mainly composed of gas can be properly adjusted. It can be appropriately adjusted according to the properties of the fibers constituting the fiber aggregate and the shape of the nonwoven fabric to be produced.

这里，例如为了使构成纤维集合体的纤维妥当地移动，由于还是主要由气体构成的流体的温度为某种程度的高的温度能够增加构成纤维集合体的纤维的自由度，所以好。另外，在纤维集合体中含有热可塑性纤维的情况下，通过主要由气体构成的流体的温度为该热可塑性纤维能够软化的温度，能够构成为，使配置在被喷射了主要由气体构成的流体的区域等的热可塑性纤维软化或者熔融，同时，能够使之再度硬化。Here, for example, in order to properly move the fibers constituting the fiber aggregate, it is preferable to increase the degree of freedom of the fibers constituting the fiber aggregate because the temperature of the fluid mainly composed of gas is somewhat high. In addition, when thermoplastic fibers are contained in the fiber aggregate, the temperature of the fluid mainly composed of gas is the temperature at which the thermoplastic fibers can be softened. The thermoplastic fiber in the area etc. softens or melts, and at the same time, it can be hardened again.

据此，例如通过喷射主要由气体构成的流体，维持无纺布的形状。另外，例如，被付与了在纤维集合体被规定的移动构件移动时，该纤维集合体(无纺布)不会散开的程度的强度。Accordingly, the shape of the nonwoven fabric is maintained, for example, by jetting a fluid mainly composed of gas. In addition, for example, when the fiber aggregate is moved by a predetermined moving member, the fiber aggregate (nonwoven fabric) is provided with strength to such an extent that the fiber aggregate (nonwoven fabric) does not unravel.

主要由气体构成的流体的流量可以恰当地调整。作为纤维彼此具有自由度的纤维集合体的具体例，例如，可以举例表示出的纤维网100是，由鞘为高密度聚乙烯，芯为聚对苯二甲酸乙二醇酯构成，纤维长为20到100mm，好的是35到65mm，纤度为1.1到8.8dtex，好的是2.2到5.6dtex的芯鞘纤维为主体，使用若为梳棉法开纤，则纤维长为20到100mm，好的是35到65mm，若为气流法开纤，则纤维长为1到50mm，好的是3到20mm的纤维，按照10到1000g/m²，好的是15到100g/m²进行调整。作为主要由气体构成的流体的条件，例如可以举例表示出在形成了图8或者图9所示的多个喷出口913的喷出部910(喷出口913：直径为0.1到30mm，好的是0.3到10mm；间距为0.5到20mm，好的是3到10mm；形状为正圆、椭圆或长方形)中，以风量为3到50L/(分·孔)，好的是5到20L/(分·孔)的条件，向纤维网100喷射温度为15到300℃(288.15K到573.15K)，好的是100到200℃(373.15K到473.15K)的热风的情况。例如，在以上述条件喷射主要由气体构成的流体的情况下，构成的纤维其位置、朝向能够变更的纤维集合体是本发明的纤维集合体的合适的例子之一。通过用这样的纤维、制造条件作成，能够形成例如图2、3所示的无纺布。槽部1、凸状部2的尺寸、纤维单位面积重量可在下述范围得到。在槽部1中，厚度为0.05到10mm，好的是0.1到5mm的范围，宽度为0.1到30mm，好的是0.5到5mm的范围，纤维单位面积重量为2到900g/m²，好的是10到90g/m²的范围。在凸状部2中，厚度为0.1到15mm，好的是0.5到10mm的范围，宽度为0.5到30mm，好的是1.0到10mm的范围，纤维单位面积重量为5到1000g/m²，好的是10到100g/m²的范围。另外，虽然可在大致上述数值范围作成无纺布，但不限于该范围。The flow rate of the fluid mainly composed of gas can be appropriately adjusted. As a specific example of a fiber aggregate having a degree of freedom between fibers, for example, thefiber web 100 that can be illustrated is that the sheath is made of high-density polyethylene, the core is made of polyethylene terephthalate, and the fiber length is 20 to 100mm, preferably 35 to 65mm, fineness 1.1 to 8.8dtex, preferably 2.2 to 5.6dtex core sheath fiber as the main body, if the carding method is used to open the fiber, the fiber length is 20 to 100mm, the best The best is 35 to 65mm. If the fiber is opened by air flow, the fiber length is 1 to 50mm, preferably 3 to 20mm, and adjusted according to 10 to 1000g/m² , preferably 15 to 100g/m² . As the condition of the fluid mainly composed of gas, for example, in theejection part 910 formed with a plurality ofejection ports 913 shown in FIG. 8 or FIG. 0.3 to 10mm; the spacing is 0.5 to 20mm, preferably 3 to 10mm; the shape is a perfect circle, ellipse or rectangle), the air volume is 3 to 50L/(min·hole), preferably 5 to 20L/(min The condition of hole) is to spray hot air at a temperature of 15 to 300°C (288.15K to 573.15K), preferably 100 to 200°C (373.15K to 473.15K), to thefiber web 100 . For example, when a fluid mainly composed of gas is sprayed under the above-mentioned conditions, a fiber aggregate in which the positions and directions of the fibers can be changed is one of the suitable examples of the fiber aggregate of the present invention. By using such fibers and production conditions, it is possible to form a nonwoven fabric as shown in FIGS. 2 and 3 , for example. The dimensions and fiber basis weight of thegroove portion 1 and theconvex portion 2 can be obtained within the following ranges. In thegroove portion 1, the thickness is in the range of 0.05 to 10 mm, preferably in the range of 0.1 to 5 mm, the width is in the range of 0.1 to 30 mm, preferably in the range of 0.5 to 5 mm, and the fiber basis weight is in the range of 2 to 900 g/m² , preferably It is in the range of 10 to 90g/^m2 . In theconvex portion 2, the thickness is in the range of 0.1 to 15 mm, preferably in the range of 0.5 to 10 mm, the width is in the range of 0.5 to 30 mm, preferably in the range of 1.0 to 10 mm, and the fiber basis weight is in the range of 5 to 1000 g/m² , preferably is in the range of 10 to 100g/m² . In addition, although the nonwoven fabric can be produced within the above-mentioned numerical range, it is not limited to this range.

5.2.2通气性支撑部件5.2.2 Ventilable support components

作为通气性支撑部件，能够举例表示出支撑纤维网100的一侧为大致平面状或者大致曲面状，同时，大致平面状或者大致曲面状的表面为大致平坦的支撑部件。作为大致平面状或者大致曲面状，例如，能够举例表示出板状、圆筒状。另外，大致平坦状例如是指支撑部件的载置纤维网100的面本身没有形成为凹凸状等的情况。具体地说，能够举例表示出网状支撑部件210的网没有被形成为凹凸状等的支撑部件。As the air-permeable support member, a support member in which the side supporting thefiber web 100 is substantially planar or substantially curved, and the substantially planar or substantially curved surface is substantially flat can be exemplified. As a substantially planar shape or a substantially curved shape, for example, a plate shape and a cylindrical shape can be exemplified. In addition, the substantially flat shape means, for example, that the surface itself on which thefiber web 100 is placed of the supporting member is not formed in a concave-convex shape or the like. Specifically, a support member in which the mesh of themesh support member 210 is not formed in a concave-convex shape can be exemplified.

作为该通气性支撑部件，例如能够举例表示出板状的支撑部件、圆筒状的支撑部件。具体地说，能够举例表示出上述的网状支撑部件210、支撑部件220。As this air-permeable supporting member, for example, a plate-shaped supporting member and a cylindrical supporting member can be exemplified. Specifically, the aforementionedmesh support member 210 andsupport member 220 can be exemplified.

这里，通气性支撑部件200能够拆装地配置在无纺布制造装置90上。据此，能够恰当地配置与所希望的无纺布相应的通气性支撑部件200。换言之，在无纺布制造装置90中，通气性支撑部件200可与从不同的多个通气性支撑部件选择的其它的通气性支撑部件进行交换。Here, the air-permeable supportingmember 200 is detachably arranged on the nonwovenfabric manufacturing apparatus 90 . Accordingly, the air-permeable support member 200 corresponding to a desired nonwoven fabric can be appropriately arranged. In other words, in the nonwovenfabric manufacturing apparatus 90, the air-permeable support member 200 can be exchanged with another air-permeable support member selected from a plurality of different air-permeable support members.

对图4所示的网状支撑部件210或者图16所示的支撑部件220的网状部分说明如下。作为该通气性的网状部分，例如能够举例表示出用基于聚酯·聚苯硫醚·尼龙·导电性单丝等的树脂的丝，或者基于不锈钢·铜·铝等的金属的丝等，以平织物·斜纹织物·缎纹织物·双层织物·螺旋织物等织入的通气性网。The mesh portion of themesh supporting member 210 shown in FIG. 4 or themesh supporting member 220 shown in FIG. 16 is described below. As the air-permeable mesh portion, for example, wires based on resins such as polyester, polyphenylene sulfide, nylon, and conductive monofilament, or wires based on metals such as stainless steel, copper, and aluminum, etc., can be exemplified. Breathable net woven with plain fabric, twill fabric, satin fabric, double-layer fabric, spiral fabric, etc.

这里，该通气性网的通气度例如能够通过部分地改变织入方法、丝的粗度、丝形状来部分地改变通气度。具体地说，能够举例表示出基于聚酯的螺旋织物的通气性筛孔、基于以不锈钢为基础的平形丝和圆形丝的螺旋织物的通气性筛孔。Here, the air permeability of the air-permeable net can be partially changed by, for example, partially changing the weaving method, the thickness of the threads, and the shape of the threads. Specifically, an air-permeable mesh based on a polyester-based spiral fabric, an air-permeable mesh based on a stainless-steel-based spiral fabric of flat and round filaments can be exemplified.

5.2.3喷射构件5.2.3 Injection components

喷出部910由于能够改变主要由气体构成的流体的朝向，因此例如能够恰当地调整所形成的凹凸的凹部(槽部)的间隔、凸状部的高度等。另外，例如由于是能够自动地变更上述流体的朝向的构成，因此，例如能够恰当地使槽部等成为蛇形状(波状、锯齿状)、其它的形状。另外，通过调整主要由气体构成的流体的喷出量、喷出时间，能够恰当地调整槽部、开口部的形状、形成图案。主要由气体构成的流体相对于纤维网100的喷射角度可以是垂直，另外，也可以在纤维网100的移动方向F中，向作为该移动方向F的线流动方向仅朝向规定角度，或者向与线流动方向相反，仅朝向规定角度。Since theejection unit 910 can change the direction of the fluid mainly composed of gas, for example, the interval between the concave and convex concave parts (groove parts) and the height of the convex parts can be adjusted appropriately. Moreover, for example, since it is a structure which can automatically change the direction of the said fluid, for example, a groove part etc. can be made into a serpentine shape (wave shape, zigzag shape) or other shapes appropriately. In addition, by adjusting the ejection amount and ejection time of the fluid mainly composed of gas, the shapes and patterns of the grooves and openings can be appropriately adjusted. The jet angle of the fluid mainly composed of gas with respect to thefiber web 100 may be vertical, and in the moving direction F of thefiber web 100, the direction of the linear flow as the moving direction F may be directed only at a predetermined angle, or toward the The lines flow in the opposite direction, only towards the specified angle.

Claims (16)

1. nonwoven fabric, be have first direction and with the nonwoven fabric of the second direction of above-mentioned first direction quadrature, it is characterized in that having:

A plurality of first areas,

A plurality of second areas that each both sides form along above-mentioned a plurality of first areas,

And a plurality of the 3rd zones, described a plurality of the 3rd zones above-mentioned a plurality of second areas each with each relative side of above-mentioned a plurality of first areas, be formed on adjacent above-mentioned a plurality of second areas between each,

Each is compared with above-mentioned a plurality of the 3rd zones, each containing ratio height of above-mentioned a plurality of first areas at the fiber of above-mentioned second direction orientation,

Each compares each containing ratio height at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of second areas with above-mentioned a plurality of the 3rd zones.

2. nonwoven fabric as claimed in claim 1 is characterized in that, each the containing ratio at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of the 3rd zones is 40% to 80%,

Above-mentioned a plurality of first area each at the containing ratio of the fiber of above-mentioned first direction orientation below 45%, and lower more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation,

Above-mentioned a plurality of second area each at the containing ratio of the fiber of above-mentioned first direction orientation more than 55%, and higher more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation.

3. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, above-mentioned a plurality of first areas each at the containing ratio of the fiber of above-mentioned second direction orientation more than 55%.

4. as each the described nonwoven fabric in the claim 1 to 3, it is characterized in that each fiber weight per unit area of above-mentioned a plurality of first areas is 3 to 150g/m²,

Each fiber weight per unit area of above-mentioned a plurality of second area is 20 to 280g/m²,

Above-mentioned a plurality of the 3rd each fiber weight per unit area of zone is 15 to 250g/m²

5. as each the described nonwoven fabric in the claim 1 to 4, it is characterized in that each fibre density of above-mentioned a plurality of first areas is at 0.18g/cm³Below,

Each fibre density of above-mentioned a plurality of second area is at 0.40g/cm³Below,

Above-mentioned a plurality of the 3rd each fibre density of zone is at 0.20g/cm³Below.

6. as each the described nonwoven fabric in the claim 1 to 5, it is characterized in that, roughly even at each height of above-mentioned a plurality of first areas, above-mentioned a plurality of second areas and above-mentioned a plurality of the 3rd zone at the thickness direction of this nonwoven fabric.

7. as each the described nonwoven fabric in the claim 1 to 5, it is characterized in that, be formed with a plurality of slot parts at this nonwoven fabric,

With a plurality of convex shaped parts to form with each adjacent mode of above-mentioned a plurality of slot parts,

Above-mentioned a plurality of first area each constitute above-mentioned a plurality of slot part each,

Each is formed in the sidepiece of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of second area,

Each is formed in the central portion of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of the 3rd zone.

8. nonwoven fabric as claimed in claim 7 is characterized in that, at the height of the thickness direction of this nonwoven fabric of above-mentioned slot part below 90% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part,

At the above-mentioned height of the above-mentioned sidepiece of above-mentioned convex shaped part below 95% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part.

9. as claim 7 or 8 described nonwoven fabric, it is characterized in that, above-mentioned a plurality of slot parts each the fiber weight per unit area with respect at each average fiber weight per unit area of above-mentioned a plurality of convex shaped parts below 90%.

10. as each the described nonwoven fabric in the claim 7 to 9, it is characterized in that each are adjacent different mutually at each above-mentioned height of above-mentioned a plurality of convex shaped parts across above-mentioned a plurality of slot parts.

11. each the described nonwoven fabric as in the claim 7 to 10 is characterized in that, is flat at each top of above-mentioned a plurality of convex shaped parts.

12. as each the described nonwoven fabric in the claim 7 to 11, it is characterized in that, on the face of the opposite sides of face that form with above-mentioned a plurality of slot parts and above-mentioned a plurality of convex shaped part of this nonwoven fabric, form to the outstanding a plurality of zones of the projected direction opposition side of above-mentioned convex shaped part.

13. each the described nonwoven fabric as in the claim 1 to 6 is characterized in that, forms a plurality of peristomes on each in above-mentioned a plurality of first areas.

14. nonwoven fabric as claimed in claim 13 is characterized in that, at each the fiber of periphery of above-mentioned a plurality of peristomes with along each the mode orientation of periphery of above-mentioned a plurality of peristomes.

15. each the described nonwoven fabric as in the claim 1 to 14 is characterized in that, this nonwoven fabric mixes the fiber of WATER REPELLENCY.

16. each the described nonwoven fabric as in the claim 1 to 15 is characterized in that having flexuosity at above-mentioned first direction.

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