Preparation method of close-fitting elastic pull-up pantsTechnical Field
The invention relates to the field of disposable sanitary products, in particular to a preparation method of close-fitting elastic pull-up pants.
Background
The pull-up diaper mainly used for babies, when babies learn to walk, wear the pull-up diaper usually, the elastic waist of pull-up diaper adopts the rubber band, make elastic waist transversely stretchable, elastic waist is through transversely stretching and baby's skin contact, and frictional force between the baby's skin is big, however, baby's skin is tender usually, if elastic waist is tighter, leave the impression on baby's skin easily, if elastic waist is more pine, pull-up diaper imbibition back, because pull-up diaper's weight grow, baby is when standing or walking, pull-up diaper takes place the tenesmus easily, probably lead to liquid leakage, especially when baby urinates again, lead to liquid leakage easily.
Chinese patent application No.: 201620792359.1, an elastic waist of pull-up pants is provided, which comprises a first elastic belt, a second elastic belt, a magic buckle arranged at two ends of the first elastic belt and a waist tape arranged at two ends of the second elastic belt and capable of sticking the magic buckle, wherein the two ends of the first elastic belt and the second elastic belt are easily detached and connected, and after the two ends of the first elastic belt and the second elastic belt are detached, the two ends of the first elastic belt and the second elastic belt are reconnected through the magic buckle and the waist tape. After the pull-up pants absorb liquid, the pull-up pants are easy to fall down, which easily causes liquid leakage.
Disclosure of Invention
Therefore, in order to solve the problems, the invention provides a preparation method of the close-fitting elastic pull-up pants. Which solves the technical problem that the pull-up diaper is easy to fall down after imbibing, resulting in leakage of the pull-up diaper.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for making body-fitting elastic pull-ups comprises the following steps:
(1) preparing a coat layer:
a1. the outer layer of non-woven fabric is conveyed along the transverse direction and is provided with a front area, a middle area and a rear area which are sequentially connected along the longitudinal direction;
a2. the first rubber band applying device is used for applying a plurality of first rubber bands applied with glue to the two side edges of the outer-layer non-woven fabric respectively, the first rubber bands are arranged transversely in a wave shape, a trapezoid shape or a rack shape, the two side edges of the outer-layer non-woven fabric are turned over through a first turning mechanism, and the first rubber bands are coated;
a3. the second rubber band applying device is used for applying a plurality of second rubber bands applied with glue to the two side edges of the outer-layer non-woven fabric respectively, the second rubber bands are arranged transversely in a wave shape, a trapezoid shape or a rack shape, the two side edges of the outer-layer non-woven fabric are turned over through a second turning mechanism, and the second rubber bands are coated to form a coat layer;
(2) preparing an absorption core body: the absorption core body is formed on a die wheel, a cutting device is used for cutting the absorption core body to form a sheet-shaped absorption core body, and the absorption core body passes through a transfer wheel and then is compounded in a middle area of the outer-layer non-woven fabric;
(3) folding: the outer garment layer is symmetrically folded through a fifth folding mechanism, and is fixed at intervals through glue or hot pressing to form fixing parts arranged at intervals;
(4) cutting: and cutting by a cutting device, wherein the cutting device cuts along the middle part of the fixing part to form the pull-up diaper.
Further:
a plurality of first rubber bands and a plurality of second rubber bands are symmetrically arranged, and the first rubber bands coincide with the corresponding second rubber bands along the transverse central line.
In the method (1), the third rubber band applying device applies a plurality of second rubber bands applied with glue to the two side edges of the outer-layer non-woven fabric respectively, the third rubber bands are arranged transversely in a wave shape, a trapezoid shape or a rack shape, the two side edges of the outer-layer non-woven fabric are folded through a fifth folding mechanism, and the third rubber bands are coated.
After the absorption core body is molded in the method (2), the leakage-proof separation edge layer is compounded on the absorption core body; rubber bands are arranged on two sides of the leakproof isolation edge layer.
In the method (2), the following methods are further included:
b1. manufacturing an intermediate absorbing layer: the first polymer device is used for blanking polymers onto the die cavity, a plurality of first adsorption cavities are arranged on the die wheel, the adsorption force of the first adsorption cavities is gradually increased along the conveying direction, the first adsorption cavities correspond to the first adsorption areas respectively, a plurality of first adsorption holes are formed in the first adsorption areas, the widths of the first adsorption areas are reduced in a stepped mode along the conveying direction, the top of the middle absorption core layer is of a stepped structure, the die cavity at the middle absorption layer is of the stepped structure, and the bottom of the middle absorption layer is of the stepped structure;
b2. manufacturing a bottom absorption layer: the second polymer device is used for blanking polymers onto the die cavity, a plurality of second adsorption cavities are formed in the die wheel and correspond to the second adsorption cavities, the die cavity at the bottom adsorption layer is of a step structure, the bottom of the bottom adsorption layer is of a step structure, and a plane structure is formed at the top of the top adsorption layer according to the method b 1;
b3. manufacturing a top absorption layer, namely blanking high molecules onto a die cavity by a third high molecule device, arranging a plurality of third absorption cavities on a die wheel, wherein the third high molecule device corresponds to the third absorption cavities, and forming a step structure at the top of the top absorption layer according to the method b 1;
b4. the third folding mechanism folds the bottom absorption layer downwards, and the bottom surface of the middle absorption layer and the bottom surface of the bottom absorption layer are folded to form a stepped first flow guide surface;
b5. the fourth folding mechanism folds the top absorbing layer upwards, and the top surface of the middle absorbing layer and the top surface of the top absorbing layer are folded to form a second flow guide surface in a step shape, so that the absorbing core body is formed.
The bottom surfaces of the middle absorption layer and the bottom absorption layer are not completely attached to form a plurality of first flow guide channels; the bottom surface of the top absorbing layer is not completely attached to the bottom surface of the middle absorbing layer, so that a plurality of second flow guide channels are formed.
In method b4, the bottom absorbent layer is folded to form a first leak-proof channel, and in method b5, the top absorbent layer is folded to form a second leak-proof channel.
The first guide surface is arranged downwards along the direction of the first leakage-proof channel, the lower end of the first guide surface is communicated with the first leakage-proof channel, the second guide surface is arranged downwards along the direction of the second leakage-proof channel, and the lower end of the second guide surface is communicated with the second leakage-proof channel.
After the method b3, a plurality of diversion holes are respectively formed on the middle absorption layer, the bottom absorption layer and the top absorption layer through a hole pressing mechanism, part of the diversion holes are communicated with the first diversion channel, part of the diversion holes are communicated with the second diversion channel, part of the diversion holes are communicated with the first leakage-proof channel, and part of the diversion holes are communicated with the second leakage-proof channel.
The first flow guide surfaces are connected through dotted glue spraying, and the second flow guide surfaces are connected through dotted glue spraying.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the invention, the first rubber band and the second rubber band are arranged transversely in a wave shape, a trapezoid shape or a rack shape, so that the first rubber band and the second rubber band not only have transverse stretching but also have longitudinal stretching effect, and the first rubber band and the second rubber band have stretching effect along all directions, and are matched with each other, so that the elastic waistline is fixed more stably, therefore, the elastic waistline of the pull-up pants can be stretched along all directions, and after the liquid absorption weight of the pull-up pants is increased, the elastic waistline can also be properly stretched and buffered along the longitudinal direction, so that the pull-up pants cannot fall down, and the side leakage of the pull-up pants is prevented; furthermore, the plurality of first rubber bands and the plurality of second rubber bands are symmetrically arranged, so that the elastic waistline is stressed uniformly and more stably, and the situation of local falling is not easy to occur; furthermore, when the third rubber band is adopted, the elastic waistline is more stable due to the arrangement of the three layers of rubber bands; furthermore, the absorption core body is folded twice to form a stepped first flow guide surface and a stepped second flow guide surface, the first flow guide surface and the second flow guide surface have the flow guide function, and when liquid is more, the first flow guide surface and the second flow guide surface can be expanded to form a buffer space to buffer the liquid, so that the flow guide and absorption capacity of the liquid is improved, and liquid leakage can be effectively prevented; furthermore, the first flow guide channel and the second flow guide channel have the function of buffering and guiding liquid, so that the flow guide and absorption capacity of the liquid is improved; furthermore, the first leakage-proof channel and the second leakage-proof channel are arranged on two sides of the absorption core body, and liquid flowing to the two sides can enter the first leakage-proof channel and the second leakage-proof channel for buffering and absorption, so that a good leakage-proof effect is achieved; furthermore, the lower end of the first flow guide surface is communicated with the first leakage-proof channel, so that part of liquid which is not absorbed before can flow to the first leakage-proof channel along the first flow guide surface for buffer absorption, and part of liquid which is not absorbed before can flow to the second leakage-proof channel along the second flow guide surface for buffer absorption, and the leakage-proof device has a good leakage-proof effect; furthermore, the flow guide holes have the functions of caching, flow guiding and infiltration; furthermore, first water conservancy diversion face and second water conservancy diversion face are connected the setting through the punctiform gluey of spouting, and the punctiform spouts and forms the clearance between the glue, is favorable to flowing along the ladder structure, and when liquid was more, the part was spouted and is glued and can come unstuck, forms the buffer memory space, and finishes when liquid absorption, recoverable original state, simple and practical.
Drawings
FIG. 1 is a schematic illustration of a process for forming pull-up pants according to the present invention;
FIG. 2 is a schematic view of a pull-up pant configuration;
FIG. 3 is a schematic unfolded structure of the absorbent core;
FIG. 4 is a schematic view of the absorbent layer of FIG. 3 shown folded over;
FIG. 5 is a schematic view of the folded configuration of the top absorbent layer of FIG. 4;
FIG. 6 is a cross-sectional view of FIG. 5;
FIG. 7 is a schematic view of the structure of an absorbent core production apparatus;
FIG. 8 is a schematic structural view of a die wheel;
FIG. 9 is a schematic view showing a partially developed state of the die wheel;
FIG. 10 is a cross-sectional view of the mold cavity;
FIG. 11 is a schematic view of another configuration of an absorbent core;
FIG. 12 is a schematic view of the edge pressing mechanism.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1-10, the present example provides a method of making body attachable elastic pull-ups comprising the steps of:
(1) preparing a coat layer:
a1. the outer layernon-woven fabric 11 is conveyed along the transverse direction, and the outer layer non-wovenfabric 11 is provided with a front area, a middle area and a rear area which are sequentially connected along the longitudinal direction;
a2. thefirst rubber band 12 applying device respectively applies a plurality offirst rubber bands 12 applied with glue to the two side edges of the outer-layer non-wovenfabric 11, thefirst rubber bands 12 are arranged transversely in a wavy mode, the two side edges of the outer-layer non-wovenfabric 11 are turned over through a first turning mechanism, and thefirst rubber bands 12 are coated;
a3. thesecond rubber band 13 applying device respectively applies a plurality ofsecond rubber bands 13 applied with glue to the two side edges of the outer-layer non-woven fabric 11, thesecond rubber bands 13 are arranged transversely in a wavy mode, the two side edges of the outer-layer non-woven fabric 11 are turned over through a second turning mechanism, and thesecond rubber bands 13 are coated to form a coat layer; a plurality offirst rubber bands 12 and a plurality ofsecond rubber bands 13 are symmetrically arranged, and thefirst rubber bands 12 coincide with the correspondingsecond rubber bands 13 along the transverse center line.
(2) Preparation of the absorbent core 2:
b1. manufacturing the middle absorption layer 21: thefirst macromolecule device 31 discharges macromolecules onto thedie cavity 40, a plurality offirst adsorption cavities 41 are arranged on thedie wheel 4, the adsorption force of thefirst adsorption cavities 41 in the conveying direction is gradually increased, thefirst adsorption cavities 41 correspond to thefirst adsorption zones 410 respectively, a plurality of first adsorption holes are formed in thefirst adsorption zones 410, the widths of thefirst adsorption zones 410 are reduced in a stepped manner in the conveying direction, the top of the middle absorption core layer forms a stepped structure, thedie cavity 40 at themiddle absorption layer 21 is in the stepped structure, and the bottom of themiddle absorption layer 21 is in the stepped structure;
b2. manufacturing the bottom absorbent layer 22: thesecond macromolecule device 32 feeds macromolecules onto thedie cavity 40, a plurality ofsecond adsorption cavities 42 are arranged on thedie wheel 4, thesecond macromolecule device 32 corresponds to thesecond adsorption cavities 42, thesecond adsorption cavities 42 respectively correspond to thesecond adsorption areas 420, a plurality of second adsorption holes are formed in thesecond adsorption areas 420, thedie cavity 40 at thebottom adsorption layer 22 is of a stepped structure, the bottom of thebottom adsorption layer 22 is of a stepped structure, and a plane structure is formed at the top of thetop adsorption layer 23 according to the method b 1;
b3. manufacturing thetop absorption layer 23, namely blanking high molecules onto adie cavity 40 by a thirdhigh molecule device 33, arranging a plurality ofthird absorption cavities 43 on adie wheel 4, wherein the thirdhigh molecule device 33 corresponds to thethird absorption cavities 43, thethird absorption cavities 43 correspond to a plurality ofthird absorption areas 430 respectively, a plurality of third absorption holes are arranged on thethird absorption areas 430, and a step structure is formed at the top of thetop absorption layer 23 according to the method b 1; forming a plurality of diversion holes 20 on themiddle absorption layer 21, thebottom absorption layer 22 and thetop absorption layer 23 respectively through a holepressing mechanism 51;
b4. the firstglue spraying mechanism 52 sprays glue at the bottom of the middle absorption layer to form punctiform glue spraying, thethird turnover mechanism 53 turns over thebottom absorption layer 22 downwards, the bottom surface of themiddle absorption layer 21 and the bottom surface of thebottom absorption layer 22 are folded to form a steppedfirst guide surface 24, thefirst guide surface 24 is connected and arranged through punctiform glue spraying, the bottom surface of themiddle absorption layer 21 is not completely attached to the bottom surface of thebottom absorption layer 22 to form a plurality offirst guide channels 240, the turnover part of thebottom absorption layer 22 forms a first leakage-proof channel 25, thefirst guide surface 24 is arranged downwards along the direction of the first leakage-proof channel 25, and the lower end of thefirst guide surface 24 is communicated with the first leakage-proof channel 25;
b5. the secondglue spraying mechanism 54 sprays glue on the top of the middle absorption layer to form punctiform glue spraying, thefourth turnover mechanism 55 turns thetop absorption layer 23 upwards, the top surface of themiddle absorption layer 21 and the top surface of thetop absorption layer 23 are folded to form a steppedsecond guide surface 26, thesecond guide surface 26 is connected and arranged through punctiform glue spraying, the bottom surface of thetop absorption layer 23 is not completely attached to the bottom surface of themiddle absorption layer 21 to form a plurality ofsecond guide channels 260, thetop absorption layer 23 is turned out to form a second leakage-proof channel 27, thesecond guide surface 26 is arranged downwards along the direction of the second leakage-proof channel 27, and the lower end of thesecond guide surface 26 is communicated with the second leakage-proof channel 27; part of the diversion holes 20 are communicated with thefirst diversion channel 240, part of the diversion holes 20 are communicated with thesecond diversion channel 260, part of the diversion holes 20 are communicated with the first leakage-proof channel 25, and part of the diversion holes 20 are communicated with the second leakage-proof channel 27, so that theabsorption core body 2 is formed.
Theleakproof isolation layer 15 is compounded on theabsorption core body 2; the leak protection separates 15 both sides of limit layer and is equipped with the rubber band, formsflaky absorption core 2 through the cutting device cutting, absorbscore 2 and passes through the median of taking turns back complex at outernon-woven fabrics 11 of shifting.
(3) Folding: the coat layer is symmetrically folded by a fifth folding mechanism and fixed by glue or hot pressing at intervals to form fixingparts 16 arranged at intervals.
(4) Cutting: the cutting is performed by a cutting device which cuts along the middle of the fixingportion 16 to form pull-ups.
Thefirst rubber band 12 and the correspondingsecond rubber band 13 can also be arranged asymmetrically, and the position relationship can also be other position relationships, and is specifically arranged according to the situation.
The hole-pressingmechanism 51 may employ two pressing rollers, each of which is provided with a hole-pressing blade and is provided with a step shape corresponding to theabsorbent core 2, which is a known device and will not be described herein again.
The firstglue spraying mechanism 52, the secondglue spraying mechanism 54, the cutting device, the transfer wheel, the first folding mechanism, the second folding mechanism, thethird folding mechanism 53, thefourth folding mechanism 55, the fifth folding mechanism, thefirst polymer device 31, thesecond polymer device 32, and thethird polymer device 33 are well-known devices, and will not be described herein again.
Thefirst rubber band 12 applying device and thesecond rubber band 13 applying device are known devices, and refer to the Chinese patent application numbers: 201920020647.9, an S-shaped rubber band applying device is provided, and the wave-shaped application of the rubber band can be realized by adopting devices with other structures, which are not described in detail herein.
In the method (1), a third rubber band can be applied, the third rubber band applying device applies a plurality ofsecond rubber bands 13 applied with glue to the two side edges of the outer-layer non-woven fabric 11 respectively, the third rubber bands are arranged in a wave shape, the two side edges of the outer-layer non-woven fabric 11 are turned over through a fifth turning mechanism, the third rubber bands are coated, the third rubber bands can be omitted, the two layers of rubber bands can play a good role generally, and the third rubber bands are arranged according to conditions.
Thefirst rubber band 12, thesecond rubber band 13 and the third rubber band can also be in a trapezoid shape or a rack shape and are specifically arranged according to the situation.
Thedie wheel 4 is divided into a plurality of adsorption cavities, which respectively generate different adsorption forces, which is a well-known technology and will not be described herein again.
The firstflow guide surface 24 can be arranged without being connected through punctiform glue spraying, the secondflow guide surface 26 can also be arranged without being connected through punctiform glue spraying, the firstflow guide surface 24 and the secondflow guide surface 26 are directly folded, the end parts of the firstflow guide surface 24 and the secondflow guide surface 26 are fixed through glue, and by the structure, the liquid can prop the firstflow guide surface 24 and the secondflow guide surface 26 open more easily to form a buffer space, but the buffer space after propping open is difficult to restore the shape, and a plurality of long strip-shaped glue spraying or other glue spraying modes can be adopted for fixation, and the arrangement is specifically set according to the situation.
Referring to fig. 1 to 12, after theabsorbent core 2 is molded, it may pass through a blank pressing mechanism, the blank pressing mechanism includes two blankpressing bases 6 and aheating device 61 connected to the blankpressing bases 6, the blankpressing bases 6 have thermal conductivity, the two blankpressing bases 6 are respectively provided with two blank pressing grooves 60, the blank pressing grooves 60 are of arc-surface structure, one of the blankpressing bases 6 extrudes the first leakage-proof channel 25 of the bottomabsorbent layer 22 upwards, and the other blankpressing base 6 extrudes the second leakage-proof channel 27 of the topabsorbent layer 23 downwards. The edge pressing mechanism can shape the first leakage-proof channel 25 and the second leakage-proof channel 27 at two sides of theabsorption core body 2, and has good leakage-proof function.
Before passing through the edge pressing mechanism, glue can be sprayed on one side of the top absorbinglayer 23, and glue can be sprayed on one side of thebottom absorbing layer 22; thebottom absorption layer 22 is adhered and fixed at the turned part, the height of the turned part of thebottom absorption layer 22 is higher than that of the top surface of thetop absorption layer 23, the turned part of thetop absorption layer 23 is adhered and fixed at thebottom absorption layer 22, and the height of the turned part of thetop absorption layer 23 is higher than that of the top surface of thetop absorption layer 23. This kind of structure for absorb the firstleak protection passageway 25 and the relative symmetry of second leak protection passageway 27 ofcore 2 both sides, and firstleak protection passageway 25 and second leak protection passageway 27 pass through three layer construction, and the top absorbslayer 23 and turns over a department height and be higher than the top surface of top absorbinglayer 23, have the effect of choked flow, imbibition, have better leak protection function.
Part of the diversion holes 20 are arranged at the upper end of the turning part of the top absorbinglayer 23 and the upper end of the turning part of thebottom absorbing layer 22, the diversion holes 20 are communicated with the first leakage-proof channel 25 or the second leakage-proof channel 27, and the diversion holes 20 are arranged along the first leakage-proof channel 25 or the second leakage-proof channel 27 in a downward inclined mode. With the structure, the liquid diffused to the two sides of the top of theabsorption core body 2 can enter the first leakage-proof channel 25 or the second leakage-proof channel 27 along the diversion holes 20, and the diversion and leakage-proof effects are good.
Theheating device 61 may be a heating tube or other heating device, which is well known and will not be described herein.
The pull-up pants are used in the following mode:
the pull-up pants are worn on a human body, the elastic waistline 14 of the pull-up pants is provided with a two-layer rubber band structure which is a wave-shaped first rubber band 12 and a wave-shaped second rubber band 13, the elastic waistline 14 of the pull-up pants can be stretched along various directions, and after the liquid absorption weight of the pull-up pants is increased, the elastic waistline 14 can also be properly stretched and buffered along the longitudinal direction, so that the pull-up pants cannot fall down, and the side leakage of the pull-up pants is prevented; when the baby urinates, first water conservancy diversion face 24 and second water conservancy diversion face 26 have the effect of water conservancy diversion, first water conservancy diversion passageway 240 and second water conservancy diversion passageway 260 have the effect of buffer memory water conservancy diversion liquid, first leak protection passageway 25 and second leak protection passageway 27 have leak protection well, the effect of water conservancy diversion, water conservancy diversion hole 20 has the infiltration, the effect of water conservancy diversion, when liquid is more, part colloid can come unstuck, make first water conservancy diversion face 24 and second water conservancy diversion face 26 form the buffer memory space, be favorable to absorbing the water conservancy diversion of 2 inside liquids of core, absorb, improve and absorb 2 water conservancy diversion of core and absorptive speed, simple and practical.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.