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JPH05245961A - Sheet-shaped elastic composite - Google Patents

Sheet-shaped elastic composite

Info

Publication number
JPH05245961A
JPH05245961AJP4219127AJP21912792AJPH05245961AJP H05245961 AJPH05245961 AJP H05245961AJP 4219127 AJP4219127 AJP 4219127AJP 21912792 AJP21912792 AJP 21912792AJP H05245961 AJPH05245961 AJP H05245961A
Authority
JP
Japan
Prior art keywords
sheet
elastic
woven fabric
nonwoven fabric
elastic composite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4219127A
Other languages
Japanese (ja)
Other versions
JP3295455B2 (en
Inventor
Migaku Suzuki
磨 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIPPON KIYUUSHIYUUTAI GIJUTSU KENKYUSHO KK
Original Assignee
NIPPON KIYUUSHIYUUTAI GIJUTSU KENKYUSHO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Application filed by NIPPON KIYUUSHIYUUTAI GIJUTSU KENKYUSHO KKfiledCriticalNIPPON KIYUUSHIYUUTAI GIJUTSU KENKYUSHO KK
Priority to JP21912792ApriorityCriticalpatent/JP3295455B2/en
Priority to ES93102261Tprioritypatent/ES2101885T3/en
Priority to US08/017,505prioritypatent/US5576090A/en
Priority to DE69310406Tprioritypatent/DE69310406T2/en
Priority to EP93102261Aprioritypatent/EP0556749B1/en
Publication of JPH05245961ApublicationCriticalpatent/JPH05245961A/en
Application grantedgrantedCritical
Publication of JP3295455B2publicationCriticalpatent/JP3295455B2/en
Anticipated expirationlegal-statusCritical
Expired - Fee Relatedlegal-statusCriticalCurrent

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Abstract

Translated fromJapanese

(57)【要約】【構成】 弾性体シートの少なくとも一方の表面に、互
いに平行な多数の結合線において不織布を貼合させたシ
ート状弾性複合体であって、隣接する結合線間において
弾性体シート11よりも不織布12の幅が広く、これに
より弾性体シートと不織布との間に、互いに平行な多数
のチャンネル状ひだ14が形成されている。【効果】 伸縮度が大きくしかも安定していてきわめて
高い防水性を有しながら、不織布の面では良好な肌触り
と通気性を有する。生理用品やオムツ等に利用して有効
である。
(57) [Summary] [Structure] A sheet-like elastic composite in which a non-woven fabric is attached to at least one surface of an elastic sheet at a plurality of parallel connecting lines, and the elastic body is provided between adjacent connecting lines. The width of the non-woven fabric 12 is wider than that of the sheet 11, so that a large number of channel-shaped pleats 14 parallel to each other are formed between the elastic sheet and the non-woven fabric. [Effect] It has a high degree of expansion and contraction, is stable, and has extremely high waterproofness, but also has good feel and breathability in terms of nonwoven fabric. It is effective for sanitary items and diapers.

Description

Translated fromJapanese
【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、弾性体シートと不織布
とを複合させたシート状弾性複合体に関し、さらに詳し
くは、優れた防水性と良好な肌触りをもち、身体に接触
した状態で使用される不透過性素材として、生理用品や
オムツ等に有利に使用できるシート状弾性複合体に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like elastic composite in which an elastic sheet and a non-woven fabric are combined, and more specifically, it has excellent waterproofness and good touch and is used in contact with the body. The present invention relates to a sheet-like elastic composite that can be advantageously used for sanitary products, diapers and the like as the impermeable material.

【0002】[0002]

【従来の技術】肌着類、靴下類等の日用品、使い捨てオ
ムツのウエスト部、股部、伸縮性包帯、外科用ガウンの
袖口等には、人体への密着性を増強、改良するために各
種の弾性体が使用されている。これらには、天然ゴム、
合成ゴム、ウレタン樹脂等の素材を、糸状、フォーム
状、フィルム状、ネット状の形態で、しかも人体への直
接接触を避けるために、織物、不織物、糸でカバリング
された状態で使用されているのが一般的である。
2. Description of the Related Art Various kinds of daily necessities such as underwear and socks, waists, crotches, elastic bandages and cuffs of surgical gowns are used to enhance and improve adhesion to the human body. An elastic body is used. These include natural rubber,
Synthetic rubber, urethane resin, and other materials are used in the form of threads, foams, films, and nets, and in order to avoid direct contact with the human body, they are used in woven, non-woven, or covered with threads. It is common to have

【0003】従来、上記のような目的に使用される素材
としては、まず弾性体を伸長し、その伸長した緊張状態
で、熱、超音波、接着剤等により素材と結合して結合体
とし、その結合体の緊張をとり除き緩和状態にすること
により得られた、ひだのよった弾性複合体が知られてい
る。現在市販されている使い捨てのオムツ等の腰部、股
部に適用されている弾性体は殆どがこの方法によって製
造されている。
Conventionally, as a material used for the above purpose, an elastic body is first stretched, and in the stretched tension state, it is joined with the material by heat, ultrasonic waves, an adhesive or the like to form a joined body, A pleated elastic composite is known, which is obtained by removing the tension of the bond and bringing it into a relaxed state. Most of the elastic bodies applied to the waist and crotch of disposable diapers currently on the market are manufactured by this method.

【0004】その他、熱収縮性を有する潜在弾性体と非
伸長性素材とを超音波、接着剤等により結合したのち、
その結合体を無緊張状態で熱雰囲気で処理することによ
り得られた弾性複合体も知られている。
In addition, after the latent elastic body having heat shrinkability and the non-stretchable material are bonded by ultrasonic waves, an adhesive, etc.,
An elastic composite obtained by treating the combined body in a tension-free state in a hot atmosphere is also known.

【0005】また特開昭59−59901号公報には、
緩和状態にあるネット状の弾性体と、PE、EVA含有
フィルム等の伸長性の相対的に低い非伸長性基材とを、
部分的、不連続的に結合し、その部分結合体を必要な程
度まで基材の許容伸度の範囲で高い緊張下で伸長させ
て、基材部分の非結合部が結合部に比較してより大きな
永久変形を起こさせ、ついでこの伸長結合体を緊張を取
り除いて弾性体部を緩和状態にすることにより、伸縮性
を有する弾性複合体を得る技術が開示されている。
Further, Japanese Patent Laid-Open No. 59-59901 discloses that
A net-like elastic body in a relaxed state and a non-stretchable base material having relatively low stretchability such as PE and EVA-containing film,
Partially and discontinuously bonded, and the partially bonded body is stretched to a required degree under high tension in the range of the allowable elongation of the base material so that the non-bonded part of the base material part is compared to the bonded part. A technique for obtaining an elastic composite body having stretchability is disclosed by causing a larger permanent deformation and then removing the tension of the extension coupling body to bring the elastic body portion into a relaxed state.

【0006】[0006]

【発明が解決しようとする課題】上記の3つの技術にも
とづく弾性複合体には、共通の欠点として、柔軟性およ
び肌触りの良さが十分でなく、おむつや生理用品のよう
に、長時間にわたって肌に接触した状態で使用される製
品の素材としては十分なものとはいえない。また液体非
透過性と通気性とは相反する条件であり、一方を増強す
れば他方が減殺されるという結果を招く。従来の技術で
は、この2つの条件をともに満足するような素材は得ら
れていない。また工業的に製造するという観点からは、
製造が容易で安価に得られるということも重要な要素で
あるが、従来の製品はこの点でも満足し得るものとはい
えない。
The elastic composites based on the above-mentioned three techniques have a common drawback that they are not sufficiently soft and have a good feel on the skin, and are long-term skin like diapers and sanitary products. It cannot be said that it is a sufficient material for products used in contact with. Further, liquid impermeability and air permeability are contradictory conditions, and if one is increased, the other will be diminished. In the conventional technology, a material satisfying both of these two conditions has not been obtained. From the viewpoint of industrial production,
It is also an important factor that it is easy to manufacture and can be obtained at low cost, but conventional products are not satisfactory in this respect as well.

【0007】[0007]

【課題を解決するための手段】本発明は弾性体シート
と、この弾性体シートの少なくとも一方の面に、一方方
向に連続した結合部が所定間隔に設けられ、不織布が結
合部において貼合され、隣接する結合部の間は非結合部
とされ、かつ非結合部における不織布の幅は前記弾性体
シートの幅よりも長く、これにより、一方方向に延びる
複数のチャンネル状ひだを形成してなることを特徴とす
るシート状弾性複合体である。
According to the present invention, an elastic sheet is provided, and at least one surface of the elastic sheet is provided with joint portions continuous in one direction at predetermined intervals, and a nonwoven fabric is bonded at the joint portion. , The non-bonded portion is formed between the adjacent bonded portions, and the width of the non-woven fabric in the non-bonded portion is longer than the width of the elastic sheet, thereby forming a plurality of channel-shaped pleats extending in one direction. It is a sheet-like elastic composite characterized by the above.

【0008】このような構造のシート状弾性複合体にお
いて、不織布は、相互に隣接する結合部間において弾性
体シートよりも長く、したがってシート状弾性複合体を
チャンネル状ひだの幅方向に伸張した場合、不織布が伸
長するまで弾性体シートのみが伸びることができる。し
たがって不織布としてほとんど延びないものを使用した
としても、チャンネルの幅方向においてはきわめて大き
い範囲で伸縮することができる。
In the sheet-like elastic composite having such a structure, the non-woven fabric is longer than the elastic sheet between the adjoining connecting portions, so that when the sheet-like elastic composite is stretched in the width direction of the channel-like pleats. Only the elastic sheet can be stretched until the nonwoven fabric is stretched. Therefore, even if a non-woven fabric that hardly extends is used, it can be expanded and contracted in an extremely large range in the width direction of the channel.

【0009】また不織布には、その製造時に機械から排
出されるマシン方向と、この方向と直交するクロスマシ
ン方向の2つの方向について、ほぼ等しい物性、とくに
伸張度を有するものもあるが、クロスマシン方向の伸張
度はマシン方向の伸張度よりも著しく大きいものもあ
る。この後者の不織布を使用する場合には、チャンネル
状ひだの方向とマシン方向とが一致するような向きで弾
性体シートに結合することが望ましい。このような構成
の複合体シートは、クロスマシン方向に大きい伸張度を
有するので、弾性体シートと不織布とをともに平坦な状
態で重ね合わせ、所望の結合線においてこの両者を貼合
した後、全体を結合線の長さ方向と直交する方向に伸長
させ、ついで開放することによりチャンネル状ひだを形
成することができる。この伸長が適度な割合、すなわち
使用された不織布のこの方向における伸長回復限界以
上、伸長限界以内の割合で行なわれると、不織布は各結
合線間の部分においてその長さが増大するような永久変
形を生じ、ここにチャンネル状ひだが形成される。
Some non-woven fabrics have substantially the same physical properties, especially the elongation, in the two directions, the machine direction discharged from the machine at the time of manufacture and the cross machine direction orthogonal to this direction. Some stretches in the direction are significantly greater than those in the machine direction. When the latter non-woven fabric is used, it is desirable to bond it to the elastic sheet in such an orientation that the direction of the channel-shaped pleats and the machine direction coincide with each other. Since the composite sheet having such a structure has a large degree of extension in the cross machine direction, the elastic sheet and the non-woven fabric are superposed together in a flat state, and the both are adhered at a desired bonding line, and then the whole is bonded. The channel-shaped pleats can be formed by extending the ridges in a direction orthogonal to the lengthwise direction of the connecting line and then opening the folds. When this elongation is carried out at a proper rate, that is, at a rate of not less than the elongation recovery limit of the used non-woven fabric in this direction and not more than the elongation limit, the non-woven fabric is permanently deformed so that its length increases in the portion between the bond lines. And a channel-shaped fold is formed here.

【0010】本発明のシート状弾性複合体において、弾
性体シートと不織布との間に形成されているチャンネル
状ひだは、まず第1に、不織布に構造的な柔軟性を与え
るように機能する。したがっておむつや生理用品のよう
に、長時間にわたって肌に接触した状態で使用される製
品の素材としてきわめて有用である。
In the sheet-like elastic composite of the present invention, the channel-like pleats formed between the elastic sheet and the nonwoven fabric function first of all to impart structural flexibility to the nonwoven fabric. Therefore, it is extremely useful as a material for products such as diapers and sanitary products that are used while being in contact with the skin for a long time.

【0011】第2に、チャンネル状ひだは弾性体シート
と不織布との間において連続的に延びているので、この
チャンネル状ひだを通して高い通気性が確保される。し
たがって不透過性シートに特有の蒸れなどの不快感を与
えることがなくなり、肌に密着して使用される種々の製
品に最適である。
Second, since the channel-shaped pleats continuously extend between the elastic sheet and the nonwoven fabric, high air permeability is ensured through the channel-shaped pleats. Therefore, the impermeable sheet does not give an unpleasant feeling such as stuffiness peculiar to the impermeable sheet, and is most suitable for various products which are used in close contact with the skin.

【0012】第3に、不織布の外表面を流れる流体に対
して、チャンネル状ひだはその長さ方向と幅方向との間
で大きく異なる抵抗を与える。すなわちチャンネル状ひ
だの長さ方向に流れる流体に対する抵抗はきわめて小さ
いが、幅方向に流れる流体に対しては著しく大きい抵抗
が与えられる。この抵抗に関する異方性は、シート状弾
性複合体をたとえば生理用ナプキンの横漏れ防止用サイ
ドバリヤに使用した場合、優れた横漏れ防止効果を発揮
する。また第4に、チャンネル状ひだ内に存在する空気
が、シート状弾性複合体の表裏における断熱性を増強す
る。
Thirdly, the channel-shaped pleats give a resistance to the fluid flowing on the outer surface of the non-woven fabric largely different between the lengthwise direction and the widthwise direction. That is, the resistance to the fluid flowing in the lengthwise direction of the channel-shaped pleats is extremely small, but the resistance to the fluid flowing in the widthwise direction is extremely large. This anisotropy related to resistance exerts an excellent side leakage prevention effect when the sheet-shaped elastic composite is used, for example, in a side barrier for side leakage prevention of a sanitary napkin. Fourthly, the air present in the channel-shaped pleats enhances the heat insulating properties on the front and back sides of the sheet-like elastic composite.

【0013】本発明において、不織布としては、シート
状弾性複合体の用途に適合するものであれば、いかなる
種類の不織布でもよいが、パラレルカードウェブを高圧
水流により結合してなる不織布、あるいはフィラメント
やトウを分織してなる不織布は、繊維が相対的にマシン
方向に配向しているために、マシン方向に較べてクロス
マシン方向における伸張度が著しく大きく、とくに好ま
しい不織布である。中でも水流交絡法によって得られる
不織布は、伸度が大きく、しかも強度およびねばりのあ
るタフネスの高い不織布で、本発明に使用するのに適し
ている。また不織布の原料繊維としては、水濡れ性が少
なく、肌に対する刺激性も少なく、しかも安全性の高い
疎水性繊維であるPE、PP、PET等の、1.5d〜
3dの合成繊維ステープルが望ましい。
In the present invention, the non-woven fabric may be any kind of non-woven fabric as long as it is suitable for the application of the sheet-like elastic composite, but a non-woven fabric formed by binding parallel card webs by a high-pressure water stream, or a filament or The non-woven fabric obtained by weaving tows is a particularly preferred non-woven fabric because the fibers are relatively oriented in the machine direction, and therefore the degree of extension in the cross machine direction is significantly larger than that in the machine direction. Among them, the non-woven fabric obtained by the hydroentangling method is a non-woven fabric having high elongation and high strength and tenacity, and is suitable for use in the present invention. Further, as the raw material fibers of the non-woven fabric, hydrophobic fibers such as PE, PP and PET, which have low water wettability, low irritation to the skin and high safety, are 1.5d to
3d synthetic fiber staples are preferred.

【0014】但し、汗に対する吸収性とを配慮する場合
レーヨン、コットン等の親水性繊維を混合する場合があ
るが、その場合には伸縮性フィルムとの良好な熱接着性
を有するためには混率は50%以下が望ましい。また混
入するレーヨン、コットン等の親水性繊維として、特に
抗菌性を有するような性能を持った、例えばキトセル、
キトボリ(フジボウ社製レーヨン、ポリノジック繊維)
を用いると、より吸水性と同時にカブレ防止に効果を持
ったものが可能になる。
However, in consideration of sweat absorbability, hydrophilic fibers such as rayon and cotton may be mixed, but in that case, in order to have good thermal adhesiveness with the stretchable film, the mixing ratio is high. Is preferably 50% or less. As hydrophilic fibers such as rayon and cotton to be mixed, chitocell, which has a particularly antibacterial property,
Kitobori (Fujibow rayon, polynosic fiber)
By using, it is possible to obtain a material that is more effective in absorbing water and simultaneously preventing fogging.

【0015】不織布は、弾性体シートの片面のみに設け
てもよいが、必要に応じて両面に設けることもできる。
またそれぞれ片面に不織布を設けた2枚の弾性体シート
を重ね合わせて1枚シート状弾性複合体とすることもで
きる。
The non-woven fabric may be provided on only one side of the elastic sheet, but may be provided on both sides as required.
It is also possible to stack two elastic sheets each having a nonwoven fabric on one side to form a single sheet elastic composite.

【0016】また本発明に用いる弾性体シートとして
は、天然ゴム、合成ゴム等の薄層シート、ポリウレタン
フィルム、ポリウレタンメルトブローン不織布、スチレ
ン・ブタジエンブロックポリマーフィルム、ポリオレフ
ィン系エラストマーフィルム等の弾性体シートが使用可
能であるが、コスト基材との接着性等から考えると、E
VA、超低密度のLLDPE、エチレン・プロピレンエ
ラストマー、エチレン・メチルアクリレートエラストマ
ー等のポリオレフィンエラストマーの単独あるいはこれ
らの合成ゴム、スチレンエチレンブタジエン・スチレン
ブロックポリマー(SEBS)のブレンド体あるいはポ
リウレタン系エラストマーと、ポリオレフィン系エラス
トマーとの共押出しフィルム等が望ましい。これらのポ
リオレフィンエラストマーの特徴は、樹脂コストも安
く、溶融押出し成形も容易で、工業的に極めて安価に製
造される素材である。また後述する不織布との結合も、
熱圧着、超音波接着等により容易に行なうことができ
る。なお本発明に用いられる弾性体は、分子の配向しや
すいマシン方向の弾性は必要でなく、クロスマシン方向
に大きい弾性を有していればよいので、この意味でも生
産上のメリットは益々強調される。
As the elastic sheet used in the present invention, a thin layer sheet of natural rubber or synthetic rubber, an elastic sheet such as a polyurethane film, a polyurethane meltblown nonwoven fabric, a styrene / butadiene block polymer film or a polyolefin elastomer film is used. It is possible, but considering the adhesiveness with the cost base material, E
VA, ultra-low density LLDPE, ethylene / propylene elastomer, ethylene / methyl acrylate elastomer and other polyolefin elastomers alone or synthetic rubbers thereof, blends of styrene ethylene butadiene / styrene block polymer (SEBS) or polyurethane elastomers, and polyolefins A coextruded film with a system elastomer is desirable. These polyolefin elastomers are characterized by low resin costs, easy melt extrusion molding, and industrially extremely inexpensive materials. Also, the bonding with the nonwoven fabric described later,
It can be easily performed by thermocompression bonding or ultrasonic bonding. Note that the elastic body used in the present invention does not need elasticity in the machine direction in which molecules are easily oriented, and may have a large elasticity in the cross machine direction. Therefore, in this sense, the merit in production is further emphasized. It

【0017】以下に本発明の実施例について図面を参照
して説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0018】[0018]

【実施例】図1は、本発明にしたがって構成されたシー
ト状弾性複合体の一例を示す部分斜視図、図2はその端
面の一部の拡大断面図である。図において、本発明のシ
ート状弾性複合体10を構成する弾性体11および不織
布12は、不織布12の第1の方向、たとえばマシン方
向(MD)には連続的に、これとほぼ直交する第2の方
向であるクロスマシン方向(CD)には不連続的に、結
合線13において互いに貼合されている。そして隣接す
る2つの結合線13,13間において、不織布12の幅
は、弾性体シート11の幅よりも広く、その結果、弾性
体シート11と不織布12との間に、マシン方向に延び
る多数のチャンネル状ひだ14が形成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial perspective view showing an example of a sheet-like elastic composite body constructed according to the present invention, and FIG. 2 is an enlarged sectional view of a part of its end face. In the figure, the elastic body 11 and the non-woven fabric 12 constituting the sheet-like elastic composite body 10 of the present invention are continuous in the first direction of the non-woven fabric 12, for example, the machine direction (MD), and are substantially orthogonal to the second direction. In the cross machine direction (CD), which is the direction of, is bonded to each other at the bond line 13 discontinuously. The width of the non-woven fabric 12 is wider than the width of the elastic sheet 11 between the two adjacent connecting lines 13 and 13, and as a result, a large number of the non-woven fabrics 12 extending in the machine direction are provided between the elastic sheet 11 and the non-woven fabric 12. Channel-shaped folds 14 are formed.

【0019】ここで、図2に示した結合部13の幅Aと
非結合部の幅Bとの比について検討すると、結合部の幅
Aが多くなれば複合化の強度は増大していくが、伸縮弾
性は低下することになる。結合部の幅Aと非結合部Bと
の割合、即ちA/(A+B)×100(%)を適切に選
択する必要がある。好ましい幅Aの値は、一般に0.5
mm以上、好ましくは1mm〜10mm、さらに好まし
くは2mm〜5mmである。0.5mm以下では切断、
分離を起こす傾向がある。またA/(A+B)×100
(%)で示される割合は、50%以下にすることが好ま
しく、50%を越えると、伸縮性が低下し、用途によっ
ては不向きになることがある。
Examining the ratio between the width A of the joint portion 13 and the width B of the non-joint portion shown in FIG. 2, the composite strength increases as the width A of the joint portion increases. However, the elasticity of elasticity will decrease. It is necessary to appropriately select the ratio between the width A of the joint portion and the non-joint portion B, that is, A / (A + B) × 100 (%). The preferred width A value is generally 0.5.
mm or more, preferably 1 mm to 10 mm, more preferably 2 mm to 5 mm. Cutting below 0.5 mm,
Tends to cause separation. Also A / (A + B) × 100
The ratio represented by (%) is preferably 50% or less, and when it exceeds 50%, the stretchability is reduced and may be unsuitable depending on the application.

【0020】弾性体シート11と不織布12との結合方
法については、この両者に対する結合性にすぐれた粘着
剤でストランド状に結合処理することもよいが、価格お
よび生産工程上、超音波融着あるいは熱圧着を用いるの
が有利である。最も好ましい方法は、弾性体シートの製
造工程時に、弾性体シートが粘着性を有している間に不
織布を重ねて結合を完了する方法である。
Regarding the method for bonding the elastic sheet 11 and the nonwoven fabric 12, it is possible to bond the elastic sheet 11 and the non-woven fabric 12 in a strand form with an adhesive having excellent bonding property to both, but in view of price and production process, ultrasonic fusion or It is advantageous to use thermocompression. The most preferable method is a method of completing the bonding by stacking non-woven fabrics while the elastic sheet has adhesiveness during the manufacturing process of the elastic sheet.

【0021】チャンネル状ひだ14が形成されるように
弾性体シート11と不織布12とを結合する手段にとく
に制限はないが、既に述べた不織布のマシン方向および
クロスマシン方向間の伸長度の差を利用して形成する方
法が適用可能である。すなわち、弾性体シートの少なく
とも一方の面に不織布を重ね、マシン方向には連続的
に、クロスマシン方向には不連続的に、結合部において
結合したのち、複合体シートを、不織布の弾性限界を越
えてクロスマシン方向に伸張させたのち開放することに
よって、不織布に永久的な伸びを生じさせ、結合部間に
おいて不織布の幅を弾性体シートの幅よりも広くするこ
とによりチャンネルを形成することが可能である。
There is no particular limitation on the means for connecting the elastic sheet 11 and the nonwoven fabric 12 so that the channel-shaped pleats 14 are formed, but the difference in the elongation between the machine direction and the cross machine direction of the non-woven fabric described above is not particularly limited. A method of forming by utilizing is applicable. That is, the non-woven fabric is laid on at least one surface of the elastic sheet, continuously in the machine direction, and discontinuously in the cross machine direction, after bonding at the joint portion, the composite sheet is subjected to the elastic limit of the non-woven fabric. It is possible to form a channel by making the width of the non-woven fabric wider than the width of the elastic sheet between the joints by causing the non-woven fabric to permanently expand by stretching it beyond the cross machine direction and then releasing it. It is possible.

【0022】本発明のシート状弾性複合体の伸縮性能
は、弾性体シートと不織布の伸長度の大きさによってき
まってくる。ここで伸長限界点を破断伸度に至る直前の
伸長度と定義すると、もし弾性体シートの伸長限界点が
200%、不織布の伸長限界点が100%とすると、シ
ート状弾性複合体は100%以上は伸長できないし、得
られる弾性複合体は100%以内での範囲の伸縮弾性を
持つことになる。
The stretchability of the sheet-like elastic composite of the present invention depends on the degree of elongation of the elastic sheet and the nonwoven fabric. Here, the elongation limit point is defined as the elongation degree just before reaching the breaking elongation. If the elongation limit point of the elastic sheet is 200% and the elongation limit point of the nonwoven fabric is 100%, the sheet-like elastic composite is 100%. The above cannot be stretched, and the obtained elastic composite has a stretch elasticity within the range of 100%.

【0023】もし弾性体シートの伸長限界点が200
%、不織布の伸長限界点が250%とすると、弾性複合
体は200%の伸縮弾性を持つことになる。従ってより
望ましい弾性複合体を得るためには、弾性体、不織布の
最適な選択、その伸長条件が重要である。一般に弾性体
として使用されている伸長度は50%〜200%(1.
5倍〜3倍)の範囲であり50%未満では伸長度として
は不充分であり、一方弾性体として500%以上の破断
伸度を持つものも多いが、伸縮回復性を考えると実用に
供せられる伸度範囲は280%、より好ましくは250
%以下である。
If the elongation limit point of the elastic sheet is 200
%, And the elongation limit point of the nonwoven fabric is 250%, the elastic composite has a stretch elasticity of 200%. Therefore, in order to obtain a more desirable elastic composite, it is important to select the elastic body and the nonwoven fabric optimally and the stretching conditions. The degree of elongation generally used as an elastic body is 50% to 200% (1.
5 times to 3 times) and less than 50%, the elongation is insufficient. On the other hand, many elastic bodies have a breaking elongation of 500% or more, but in consideration of stretch recovery, it is practically used. The elongation range allowed is 280%, more preferably 250
% Or less.

【0024】伸長限界点は、不織布の伸長限界点と弾性
体の伸長限界点を比較して、数値の低い方の伸長限界点
で弾性複合体の伸長限界点がきまる。したがって伸縮弾
性をできるだけ高くするためには、弾性体シートの性能
を最大限に生かす必要があり、不織布のクロスマシン方
向の伸長性を高くする理由がここにある。
Regarding the extension limit point, the extension limit point of the elastic composite is determined by comparing the extension limit point of the nonwoven fabric with the extension limit point of the elastic body, and the extension limit point of the lower numerical value determines the extension limit point of the elastic composite. Therefore, in order to maximize the stretch elasticity as much as possible, it is necessary to maximize the performance of the elastic sheet, and this is the reason why the stretchability of the nonwoven fabric in the cross machine direction is increased.

【0025】表1に、本発明に適した不織布の例を示
す。
Table 1 shows examples of nonwoven fabrics suitable for the present invention.

【0026】[0026]

【表1】[Table 1]

【0027】本発明において、シート状弾性複合体は、
図1に示したように、弾性体シート11の一方の面のみ
に不織布12を設ける他、図3に示すように、両側に不
織布12を設けたサンドイッチ構造とすることも可能で
あり、また図4に示すように、それぞれ不織布12を設
けた2枚の弾性体シート11を重ね合わせた構造をとる
こともできる。
In the present invention, the sheet-like elastic composite is
As shown in FIG. 1, in addition to providing the non-woven fabric 12 on only one surface of the elastic sheet 11, it is also possible to adopt a sandwich structure in which the non-woven fabric 12 is provided on both sides as shown in FIG. As shown in FIG. 4, it is also possible to adopt a structure in which two elastic body sheets 11 each provided with a nonwoven fabric 12 are superposed.

【0028】[0028]

【発明の効果】以上に説明したように本発明によれば、
大きい伸縮性と不透過性を有する弾性体シートの少なく
とも一方の面に、一方向には連続的に、これとほぼ直交
する方向には不連続的に、結合部において貼合わされた
不織布を設け、この不織布は、相互に隣接する結合部間
において、弾性体シートよりも長く、これにより弾性体
シートとの間に、互いに平行に延びる複数のチャンネル
状ひだを形成したので、伸縮性および防水性に優れてお
り、また不織布の側では通気性に優れ、柔軟であるとい
う特性を有する。したがって、特に肌に接触した状態で
使用される種々の製品、たとえば生理用ナプキンや使い
捨てオムツ等の腰部や股部に適用するのに最適である。
As described above, according to the present invention,
At least one surface of the elastic sheet having large elasticity and impermeability is continuously provided in one direction, and discontinuously provided in a direction substantially orthogonal thereto, and a non-woven fabric bonded at the joint portion is provided. This non-woven fabric is longer than the elastic sheet between the adjacent bonding portions, and a plurality of channel-shaped folds extending in parallel with each other are formed between the elastic sheet and the elastic sheet. It is excellent, and has the characteristics that it is highly breathable and flexible on the non-woven fabric side. Therefore, it is most suitable to be applied to various products used particularly in contact with the skin, for example, the waist and crotch of sanitary napkins and disposable diapers.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例によるシート状弾性複合体の
一部を示す斜視図。
FIG. 1 is a perspective view showing a part of a sheet-like elastic composite body according to an embodiment of the present invention.

【図2】図3のシート状弾性複合体の部分拡大断面図。FIG. 2 is a partially enlarged sectional view of the sheet-like elastic composite body of FIG.

【図3】本発明の他の実施例によるシート状弾性複合体
の断面図。
FIG. 3 is a sectional view of a sheet-like elastic composite according to another embodiment of the present invention.

【図4】本発明の他の実施例によるシート状弾性複合体
の断面図。
FIG. 4 is a cross-sectional view of a sheet-shaped elastic composite body according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

10 シート状弾性複合体 11 弾性体シート 12 不織布 13 結合線 14 チャンネル状ひだ 10 Sheet-shaped elastic composite 11 Elastic sheet 12 Nonwoven fabric 13 Bonding line 14 Channel-shaped pleats

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 A61F 5/44 H 7807−4C B32B 5/08 7016−4F 7603−4C A61F 13/18 320─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl.5 Identification code Internal reference number FI Technical display location A61F 5/44 H 7807-4C B32B 5/08 7016-4F 7603-4C A61F 13/18 320

Claims (5)

Translated fromJapanese
【特許請求の範囲】[Claims]【請求項1】 弾性体シートと、この弾性体シートの少
なくとも一方の面に、一方方向に連続した結合部が所定
間隔で設けられ、不織布が結合部において貼合され、隣
接する結合部との間は非結合部とされ、かつ非結合部に
おける不織布の幅は前記弾性体シートの幅よりも長く、
これにより一方方向に延びる複数のチャンネル状ひだを
形成してなることを特徴とするシート状弾性複合体。
1. An elastic sheet, and at least one surface of the elastic sheet is provided with connecting portions continuous in one direction at predetermined intervals, and a nonwoven fabric is attached at the connecting portions, and adjacent connecting portions are formed. Between the non-bonded portion, and the width of the nonwoven fabric in the non-bonded portion is longer than the width of the elastic sheet,
Thus, a sheet-like elastic composite body is formed by forming a plurality of channel-like pleats extending in one direction.
【請求項2】 不織布は結合部と直角方向には伸張性を
有するが伸長回復性は少ないものであり、チャンネル状
ひだは弾性体シートと結合部において貼合された不織布
が、その伸長限界付近まで結合部と直角方向に伸長され
た後開放されたことによって形成されたものである請求
項1に記載のシート状弾性複合体。
2. The non-woven fabric has stretchability in the direction perpendicular to the joint portion but has little elongation recovery, and the channel-shaped pleats are close to the stretch limit of the non-woven fabric bonded to the elastic sheet at the joint portion. The sheet-like elastic composite according to claim 1, which is formed by being stretched in a direction perpendicular to the joint and then opened.
【請求項3】 不織布が弾性体シートの両面に設けられ
ている請求項1又は2記載のシート状弾性複合体。
3. The sheet-like elastic composite according to claim 1, wherein the nonwoven fabric is provided on both sides of the elastic sheet.
【請求項4】 弾性体シートの片面にチャンネル状ひだ
を形成した不織布を貼合したシートを2枚、各々の弾性
体シートが対面するように重ね合せた構造とした請求項
1又は2に記載のシート状弾性複合体。
4. The structure according to claim 1 or 2, wherein two sheets each of which is formed by laminating a nonwoven fabric having a channel-shaped fold formed on one surface of an elastic body sheet, are laminated so that the respective elastic body sheets face each other. Sheet-like elastic composite.
【請求項5】 弾性体シートと不織布の結合部の幅が、
結合部と非結合部の幅の和の50%以下である請求項1
〜4のいずれかに記載のシート状弾性複合体。
5. The width of the joint portion between the elastic sheet and the nonwoven fabric is
5. The width is 50% or less of the sum of the widths of the joint portion and the non-joint portion.
The sheet-shaped elastic composite according to any one of claims 1 to 4.
JP21912792A1992-02-131992-08-18 Sheet-shaped elastic compositeExpired - Fee RelatedJP3295455B2 (en)

Priority Applications (5)

Application NumberPriority DateFiling DateTitle
JP21912792AJP3295455B2 (en)1992-08-181992-08-18 Sheet-shaped elastic composite
ES93102261TES2101885T3 (en)1992-02-131993-02-12 ELASTIC COMPOSITE MATERIAL OF SHEETS FOR HYGIENIC ITEMS, PROCEDURE FOR ITS MANUFACTURE AND USES.
US08/017,505US5576090A (en)1992-02-131993-02-12Sheet elastic complex used in sanitary products its manufacturing process, and its usages
DE69310406TDE69310406T2 (en)1992-02-131993-02-12 Compound elastic sheet for hygiene articles, their manufacturing process and their use
EP93102261AEP0556749B1 (en)1992-02-131993-02-12A sheet elastic complex used in sanitary products, its manufacturing process, and its usages

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP21912792AJP3295455B2 (en)1992-08-181992-08-18 Sheet-shaped elastic composite

Related Parent Applications (1)

Application NumberTitlePriority DateFiling Date
JP02681892ADivisionJP3331221B2 (en)1992-02-131992-02-13 Elastic composite and its manufacturing method

Publications (2)

Publication NumberPublication Date
JPH05245961Atrue JPH05245961A (en)1993-09-24
JP3295455B2 JP3295455B2 (en)2002-06-24

Family

ID=16730666

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP21912792AExpired - Fee RelatedJP3295455B2 (en)1992-02-131992-08-18 Sheet-shaped elastic composite

Country Status (1)

CountryLink
JP (1)JP3295455B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH08154972A (en)*1994-12-021996-06-18Kao Corp Absorbent article
US6432094B1 (en)1998-05-182002-08-13Uni-Charm CorporationAbsorbent article having cushion layer
FR2893036A1 (en)*2005-11-082007-05-11Aplix Sa NON-WOVEN-ELASTOMER-NON-WOVEN LAMINATE
WO2008004456A1 (en)2006-07-072008-01-10Uni-Charm CorporationSheet member, high-density region-containing sheet manufacturing method and disposable diaper using sheet member
CN100448575C (en)*2003-09-082009-01-07花王株式会社Composite expansion member and method for manufacturing same
JP2009536888A (en)*2006-05-122009-10-22エスセーアー・ハイジーン・プロダクツ・アーベー Elastic laminate and method for producing an elastic laminate
US8545654B2 (en)2006-05-122013-10-01Sca Hygiene Products AbPant-type absorbent article and a method for producing pant-type absorbent articles
JP2020121556A (en)*2019-01-292020-08-13積水フーラー株式会社 Stretchable composite material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH08154972A (en)*1994-12-021996-06-18Kao Corp Absorbent article
US6432094B1 (en)1998-05-182002-08-13Uni-Charm CorporationAbsorbent article having cushion layer
CN100448575C (en)*2003-09-082009-01-07花王株式会社Composite expansion member and method for manufacturing same
FR2893036A1 (en)*2005-11-082007-05-11Aplix Sa NON-WOVEN-ELASTOMER-NON-WOVEN LAMINATE
US7655583B2 (en)2005-11-082010-02-02AplixNon-woven fabric laminate/elastomer/non-woven fabric
US8545654B2 (en)2006-05-122013-10-01Sca Hygiene Products AbPant-type absorbent article and a method for producing pant-type absorbent articles
JP2009536888A (en)*2006-05-122009-10-22エスセーアー・ハイジーン・プロダクツ・アーベー Elastic laminate and method for producing an elastic laminate
US8852372B2 (en)2006-05-122014-10-07Sca Hygiene Products AbPant-type absorbent article and a method for producing pant-type absorbent articles
US8741083B2 (en)2006-05-122014-06-03Sca Hygiene Products AbElastic laminate and a method for producing an elastic laminate
WO2008004456A1 (en)2006-07-072008-01-10Uni-Charm CorporationSheet member, high-density region-containing sheet manufacturing method and disposable diaper using sheet member
JP2012126140A (en)*2006-07-072012-07-05Unicharm CorpSheet member, method for manufacturing high density region containing sheet, and disposable diaper using sheet member
JP2012091525A (en)*2006-07-072012-05-17Unicharm CorpSheet member, method for manufacturing sheet including high-density region, and disposable diaper using the sheet member
US8105303B2 (en)2006-07-072012-01-31Uni-Charm CorporationSheet member, high-density region-containing sheet manufacturing method and disposable diaper using sheet member
JP2020121556A (en)*2019-01-292020-08-13積水フーラー株式会社 Stretchable composite material

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