WO2020235179A1

WO2020235179A1 - Absorbent article and method for producing absorbent article

Info

Publication number: WO2020235179A1
Application number: PCT/JP2020/010069
Authority: WO
Inventors: 翔希長友; 橋本　達也; 邦彦桂川
Original assignee: ユニ・チャーム株式会社
Priority date: 2019-05-20
Filing date: 2020-03-09
Publication date: 2020-11-26
Also published as: JP7458714B2; CN113795228B; CN113795228A; BR112021023183A2; JP2020188874A

Abstract

An absorbent article (1) including an absorbent body (10), a ventral side band member (20), and a dorsal side band member (30), one of the band members among the ventral side and dorsal side band members (20, 30) comprising a first sheet (21) and a second sheet (22), the other band member comprising a third sheet (31) and a fourth sheet (32), and the sheets (21, 22, 31, 32) being respectively bonded at both end portions (20e, 30e) of the ventral side and dorsal side band members (20, 30) in the left-right direction. In a state in which the ventral side and dorsal side band members (20, 30) are stretched, the first sheet (21) has a non-skin side portion (21e) that is disposed more toward the non-skin side than the second sheet (22) is and a folded portion (21f) that is folded onto the skin side, and the third sheet (31) is disposed more toward the non-skin side than the fourth sheet is and is not folded.

Description

Absorbent article and manufacturing method of absorbent article

The present invention relates to an absorbent article and a method for producing an absorbent article.

Pants-type diapers can be exemplified as absorbent articles. Patent Document 1 discloses a pants-type absorbent article in which the sheet material constituting the ventral and dorsal exterior bodies has a folded portion folded back toward the inner surface side of the absorbent article along the peripheral edge of the waist opening. Has been done.

JP 2013-116196

In the pants-type absorbent article described in Patent Document 1, since both the ventral exterior body and the dorsal exterior body of the waist opening are formed by folding back the material, there is a problem that the material cost is increased by the amount of folding back.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an absorbent article capable of reducing costs while maintaining the aesthetics of the end portion of the waist circumference opening. To provide.

The main invention for achieving the above object is an absorbent main body that has a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other and absorbs a liquid, and an absorbent main body provided along the left-right direction of the absorbent main body. It has a ventral band member joined to the front upper end portion and a dorsal band member provided along the left-right direction and joined to the rear upper end portion of the absorbent body, and has the ventral band member and the back. One of the side band members has a first sheet and a second sheet, and the ventral band member and the other band member of the dorsal band member have a third sheet and a fourth sheet. The first sheet, the second sheet, the third sheet, and the fourth sheet are absorbent articles that are joined at both ends of the ventral band member and the dorsal band member in the left-right direction. In the extended state in which the ventral band member and the dorsal band member are extended, the first sheet is a non-skin side portion arranged on the non-skin side of the second sheet and one of the members. It is an absorbent article having a folded portion folded back toward the skin at the upper end, and the third sheet is arranged on the non-skin side of the fourth sheet and is not folded back.

Further, an absorbent main body having a vertical direction, a horizontal direction, and a front-back direction intersecting each other and absorbing liquid, and a ventral band provided along the left-right direction and joined to the front upper end portion of the absorbent main body. A method for manufacturing an absorbent article having a member and a dorsal band member provided along the left-right direction as a separate member from the ventral band member and joined to the rear upper end portion of the absorbent body. The non-skin side continuous sheet which is the non-skin side sheet of the ventral band member and the dorsal band member, and the skin side sheet of the ventral band member and the dorsal band member which are continuous in the transport direction, and the transport direction The crossing CD-direction length is shorter than the CD-direction length of the non-skin-side continuous sheet, and the skin-side continuous sheet continuous in the transport direction is provided with one end of the non-skin-side continuous sheet in the CD direction and the non-skin-side continuous sheet. With the non-skin side continuous sheet so that the distance from one end of the skin side continuous sheet is shorter than the distance between the other end of the non-skin side continuous sheet and the other end of the skin side continuous sheet in the CD direction. In the step of laminating the skin-side continuous sheet and the other end of the non-skin-side continuous sheet in the CD direction without folding back one end of the non-skin-side continuous sheet in the CD direction of the absorbent article. The step of folding back to the skin side and the bonded non-skin side continuous sheet and the skin side continuous sheet are cut together at the central portion of the non-skin side continuous sheet and the skin side continuous sheet in the CD direction. Then, the step of forming the ventral band-shaped continuous sheet and the dorsal band-shaped continuous sheet and the front upper end portion of the absorbent body and the ventral band-shaped continuous sheet are joined, and the rear upper end portion of the absorbent body and the said It is a method for producing an absorbent article, which comprises a step of joining a dorsal strip-shaped continuous sheet.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article capable of reducing costs while maintaining the aesthetics of the end portion of the waist circumference opening.

It is a schematic perspective view of the pants type disposable diaper 1 which concerns on 1st Embodiment. FIG. 5 is a schematic plan view of the unfolded and stretched diaper 1 according to the first embodiment as viewed from the skin side. It is the schematic sectional drawing of the line AA of FIG. It is a schematic enlarged view which enlarged the back side band member 30 side of FIG. It is a schematic perspective view of the pants type disposable diaper 1 which concerns on 2nd Embodiment. FIG. 5 is a schematic cross-sectional view taken along the line BB of FIG. It is a schematic diagram which shows the manufacturing flow of the pants type disposable diaper 1 which concerns on 1st Embodiment. It is sectional drawing explaining the steps S210 and S211 of the pants type disposable diaper 1 which concerns on 2nd Embodiment. It is the schematic which shows the manufacturing flow of the pants-type disposable diaper 1 which concerns on 2nd Embodiment.

The description of the present specification and the accompanying drawings will clarify at least the following matters.
An absorbent main body that has a vertical direction, a horizontal direction, and a front-back direction that intersect each other and absorbs liquid, and a ventral band member that is provided along the left-right direction and is joined to the front upper end portion of the absorbent main body. A dorsal band member provided along the left-right direction and joined to the rear upper end portion of the absorbent body, and one of the ventral band member and the dorsal band member is a band member. It has a first sheet and a second sheet, and the other band member of the ventral band member and the dorsal band member has a third sheet and a fourth sheet, and the first sheet and the second sheet. The sheet, the third sheet, and the fourth sheet are absorbent articles joined at both ends of the ventral band member and the dorsal band member in the left-right direction, and the ventral band member and the dorsal band member. In the extended state in which the members are stretched, the first sheet includes a non-skin side portion arranged on the non-skin side of the second sheet and a folded portion folded back toward the skin side at the upper end of the one member. The third sheet is an absorbent article which is arranged on the non-skin side of the fourth sheet and is not folded back.

According to such an absorbent article, the ventral band member side, which is one band member of the waist circumference portion, has a folded portion, so that the upper end of the dorsal band member on the other side is folded back while maintaining the aesthetics of the absorbent article. By not doing so, the amount of material for forming the waist circumference can be reduced, and as a result, the cost can be reduced.

It is desirable that the upper end position of the third sheet and the upper end position of the fourth sheet of the absorbent article are displaced in the vertical direction.

According to such an absorbent article, the rigidity of the end portion is lowered by shifting the upper end position of each sheet on the non-folded band member side, and the discomfort to the touch when worn can be reduced.

It is desirable that the one band member of the absorbent article further has another sheet provided so as to overlap the folded portion from the skin side.

According to such an absorbent article, the presence of another material (another sheet) further increases the strength and makes it less likely to be damaged when the absorbent article is pulled up.

In such an absorbent article, the average basis weight of the first sheet is equal to or greater than the average basis weight of the second sheet, and the average basis weight of the third sheet is equal to or greater than the average basis weight of the fourth sheet. It is desirable to have.

According to such an absorbent article, the strength can be maintained by having a high average basis weight of the first sheet and the third sheet arranged on the non-skin side, and it becomes difficult to tear when pulled up. The second and fourth sheets, which have a low average basis weight, have low rigidity and therefore have a good feel to the touch, and also have high breathability and moisture permeability, so that they can promote the discharge of moisture in the absorbent article. it can.

It is desirable that the absorbent article is provided with a plurality of holes in at least one of the first sheet and the third sheet, or the second sheet and the fourth sheet.

According to such an absorbent article, the presence of openings further improves air permeability.

In such an absorbent article, the one band member has a plurality of through holes provided so as to penetrate the non-skin side portion of the first sheet and the second sheet, and the folded portion. Is a region in which the plurality of through holes do not exist, and the folded-back portion overlaps the plurality of through holes when viewed in the front-rear direction, and the first sheet and the second sheet It is desirable that a plurality of elastic members that expand and contract in the left-right direction are joined by an adhesive in a state of being arranged in the vertical direction.

According to such an absorbent article, the through hole improves the air permeability, and the folded portion prevents the adhesive from seeping out from the through hole. As a result, the discomfort to the wearer due to the exudation of the adhesive is reduced while ensuring the breathability.

In such an absorbent article, the absorbent body has an overlapping region that overlaps at least a part of the plurality of through holes when viewed in the front-rear direction, and a part of the skin side surface of the folded portion and the said. It is desirable that the non-skin side surface of the overlapping region is bonded with an adhesive.

According to such an absorbent article, while improving the air permeability by the through hole, the folded portion is interposed between the through hole and the absorbent main body when viewed in the front-rear direction, whereby the absorbent main body and the ventral side or the back It is also possible to prevent the adhesive from seeping out to the non-skin side when the side band member is joined. Therefore, the discomfort of the wearer due to the exudation of the adhesive is reduced.

In such an absorbent article, a plurality of elastic members that expand and contract in the left-right direction are joined by an adhesive between the first sheet and the second sheet in a state of being arranged in the vertical direction. A plurality of elastic members that expand and contract in the left-right direction are joined by an adhesive between the third sheet and the fourth sheet in a state of being arranged in the vertical direction, and the ventral band member and the dorsal band. In each of the members, it is desirable that the average basis weight of the adhesive applied to the elastic member located on the lowermost side is higher than the average basis weight of the adhesive applied to the elastic member located on the uppermost side.
An absorbent article characterized by that.

According to such an absorbent article, the elastic member located at the lowermost side of each of the ventral band member and the dorsal band member forms at least a part of the leg circumference opening and is located at the lowermost side thereof. Since the average basis weight of the adhesive to the elastic member is high, the elastic member is firmly joined, and the elastic member is hard to come off even if the wearer's leg moves.

In such an absorbent article, it is desirable that the upper end of the second sheet of the one band member is located below the elastic member located on the uppermost side of the plurality of elastic members. ..

According to such an absorbent article, in one band member having a folded portion, even if the second sheet is not arranged up to the upper end of the band member, the upper end is folded back with the non-skin side portion of the first sheet. It is possible to join an elastic member to the portion. By reducing the amount of the second sheet arranged in this way, the cost can be reduced.

In such an absorbent article, it is desirable that the upper end of the second sheet of the one band member is located above the elastic member located at the uppermost side of the plurality of elastic members.

According to such an absorbent article, in one band member having a folded portion, the strength of the upper end portion is improved by the presence of the second sheet up to the upper end, and the absorbent article is less likely to be damaged when pulled up.

In such an absorbent article, in the other band member, the elastic member located on the uppermost side of the plurality of elastic members is set as the first elastic member, and the elastic member located on the lower side of the first elastic member. Is a second elastic member, it is desirable that the distance from the upper end of the other band member to the first elastic member is longer than the distance from the lower end of the first elastic member to the upper end of the second elastic member. ..

According to such an absorbent article, when the distance from the upper end of the other band member to the first elastic member is shorter than the distance from the lower end of the first elastic member to the upper end of the second elastic member, the first And, it is easily affected by the contraction of the second elastic member, and there is a possibility that the upper end edge contracts too much. By making the distance from the upper end of the other band member to the first elastic member longer than the distance from the lower end of the first elastic member to the upper end of the second elastic member, it is less affected by the contraction of the elastic member. The upper end edge of the unfolded band member is likely to be formed neatly.

An absorbent main body that has a vertical direction, a horizontal direction, and a front-rear direction that intersect each other and absorbs liquid, and a ventral band member that is provided along the left-right direction and is joined to the front upper end portion of the absorbent main body. A method for manufacturing an absorbent article, which is provided along the left-right direction as a member separate from the ventral band member and has a dorsal band member joined to the rear upper end portion of the absorbent body. A non-skin side continuous sheet that is a non-skin side sheet of the side band member and the back side band member, and a skin side sheet of the ventral band member and the back side band member that is continuous in the transport direction and intersects the transport direction. The skin-side continuous sheet having a length in the CD direction shorter than the length of the non-skin-side continuous sheet in the CD direction and continuous in the transport direction is provided as one end of the non-skin-side continuous sheet and the skin-side in the CD direction. The non-skin side continuous sheet and the skin so that the distance from one end of the continuous sheet is shorter than the distance between the other end of the non-skin side continuous sheet and the other end of the skin side continuous sheet in the CD direction. The step of laminating the side continuous sheet and the other end of the non-skin side continuous sheet in the CD direction without folding back one end of the non-skin side continuous sheet in the CD direction on the skin side of the absorbent article. In the step of folding back the non-skin side continuous sheet and the skin side continuous sheet, the non-skin side continuous sheet and the skin side continuous sheet are cut together at the central portion of the non-skin side continuous sheet and the skin side continuous sheet in the CD direction. The step of forming the ventral band-shaped continuous sheet and the dorsal band-shaped continuous sheet, and the front upper end portion of the absorbent body and the ventral band-shaped continuous sheet are joined to form the rear upper end portion of the absorbent body and the dorsal side. It is a method for producing an absorbent article, which comprises a step of joining a strip-shaped continuous sheet.

According to such a manufacturing method, it is possible to manufacture an absorbent article capable of cost reduction while having an aesthetic appearance at the end of the waist circumference opening.

In the method for producing such an absorbent article, the non-skin side continuous sheet is aligned so that the one end of the non-skin side continuous sheet in the CD direction and the one end of the skin side continuous sheet in the CD direction are aligned. Alternatively, it is desirable to have a step of adjusting the position of the skin-side continuous sheet in the CD direction.

According to such a manufacturing method, the ends that are the upper ends on one side of the waist circumference opening are aligned, and the aesthetics of the ends are ensured.

In the method for producing an absorbent article, in the joining step, the ventral strip-shaped continuous sheet and the dorsal strip-shaped continuous sheet are joined so that a part of the cut end is covered with the absorbent body. It is desirable to do.

According to such a manufacturing method, the cut side directly constitutes the lower end of the waist circumference portion (that is, a part of the leg circumference opening), and each sheet of each band member is less likely to be displaced at the lower end. Become. Thereby, the aesthetic appearance of the leg circumference opening can be obtained. Further, since the process of changing the direction such that the end on the cut side comes to the upper end of the waist circumference portion after cutting is not provided, the cost of the manufacturing process can be reduced.

In the method for producing such an absorbent article, in the step of laminating, a step of penetrating a pin through the non-skin side continuous sheet to form a non-skin side opening in the non-skin side continuous sheet, and the step of forming the non-skin side opening, A step of penetrating the pin penetrating the skin-side continuous sheet through the skin-side continuous sheet to form a skin-side opening in the skin-side continuous sheet is included, and in the folding step, the said It is desirable to fold the other end of the non-skin side continuous sheet so that the non-skin side continuous sheet covers the skin side opening from the skin side.

According to such a manufacturing method, holes can be formed at the same time during the bonding process of the non-skin side continuous sheet and the skin side continuous sheet, and the cost of the manufacturing process can be reduced.

In the method for producing an absorbent article, a step of applying an adhesive to a region of the skin side surface of the skin-side continuous sheet where the skin-side opening does not exist is provided before the folding-back step. Then, it is desirable to fold the other end of the non-skin side continuous sheet so that the non-skin side continuous sheet overlaps the region to which the adhesive is applied.

According to such a manufacturing method, the non-skin side continuous sheet is folded back so as to overlap with the adhesive, thereby preventing the adhesive from seeping out to the skin side. By making it difficult to seep out, it is possible to manufacture an absorbent article that reduces discomfort to the wearer due to seepage.

=== 1st Embodiment ===
Hereinafter, embodiments will be described with reference to a pants-type disposable diaper for infants as an absorbent article according to the present invention. However, the present invention is not limited to the above, and the absorbent article according to the present invention can also be applied to disposable diapers for adults, shorts-type sanitary napkins, tape-type disposable diapers worn on the wearer with hook tape, and the like.

<Structure of pants-type disposable diaper 1>
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter referred to as “diaper”) according to the first embodiment. FIG. 2 is a schematic plan view of the unfolded and stretched diaper 1 according to the first embodiment as viewed from the skin side. FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG.

In the pants-shaped state before wearing as shown in FIG. 1, the diaper 1 has a "vertical direction", a "horizontal direction" orthogonal to the vertical direction, and a "front-back direction" orthogonal to the vertical direction and the horizontal direction. Have. In the vertical direction, the upper side corresponds to the waist opening side of the wearer, and the lower side corresponds to the inseam side of the wearer. In the front-back direction, the front side corresponds to the ventral side of the wearer, and the rear side corresponds to the back side of the wearer.

In the pants-shaped state of FIG. 1, the diaper 1 is located on the left and right sides of the absorbent main body 10 that absorbs the liquid, the ventral band member 20 provided along the left-right direction, and the rear side of the ventral band member 20. It has a dorsal band member 30 provided along the direction. The absorbent body 10 is provided as an inseam between the ventral band member 20 and the dorsal band member 30. The ventral band member 20 and the dorsal band member 30 jointly form a waist circumference opening BH on the upper side in the vertical direction, and are also a waist circumference portion 2 that is applied to the wearer's waist circumference.

Further, the left-

right end portions

20e and 20e of the ventral band member 20 and the left-

right end portions

30e and 30e of the corresponding dorsal band member 30 are joined by welding or the like. As a result, the ventral band member 20 and the dorsal band member 30 form leg circumference openings LH and LH on both sides in the lower and left-right directions in cooperation with the absorbent main body 10.

Here, the "deployed state" means that the ventral band member 20 and the dorsal band member 30 are separated by breaking the joints on both sides of the diaper 1 in the pants-shaped state shown in FIG. 1, and the diaper 1 is moved in the vertical direction. By opening the diaper 1, the diaper 1 is unfolded on a flat surface. The "extended state" is a state in which the product (diaper 1) is extended without wrinkles, specifically, the dimensions of each member (for example, the absorbent main body 10 and the ventral band member 20) constituting the diaper 1. Refers to a state in which is extended until the length of the member is equal to or close to the size of the member alone.

In the unfolded state, the diaper 1 has a longitudinal direction, a left-right direction, and a thickness direction (direction penetrating the paper surface in FIG. 2) as three directions orthogonal to each other. The longitudinal direction is along the above-mentioned vertical direction. Then, one side in the longitudinal direction corresponds to the ventral side (front side), and the other side corresponds to the dorsal side (rear side). Further, the outer side in the longitudinal direction corresponds to the upper side in the vertical direction (the waist circumference opening BH side), and the inner side in the longitudinal direction corresponds to the lower side in the vertical direction (inseam side). Since the longitudinal direction and the vertical direction are similar to each other in this way, for convenience of explanation, the vertical direction may be used instead of the longitudinal direction even in this expanded state. .. On the other hand, the left-right direction is synonymous with the left-right direction in the above-mentioned pants type state. Further, in the thickness direction, one side corresponds to the skin side in contact with the wearer's body, and the other side corresponds to the non-skin side on the opposite side.

In the unfolded diaper 1 of FIG. 2, the absorbent main body 10 is hung between the ventral band member 20 and the dorsal band member 30 along the longitudinal direction, and the front upper end portion 10ea and the ventral band of the absorbent main body 10 are hung. The member 20 is joined and fixed, and the rear upper end portion 10eb of the absorbent main body 10 and the back side band member 30 are joined and fixed. As a result, the external shape is substantially H-shaped in a plan view. Further, from this state, the diaper 1 is folded in half with the predetermined position C10 in the longitudinal direction (the center position C10 of the diaper 1 in the longitudinal direction) in the absorbent body 10 as the folding position, and as described above, the ventral side and the back By joining the left and

right end portions

20e and 30e of the

side band members

20 and 30, the pants-type diaper 1 shown in FIG. 1 is obtained.

As the absorbent body 10, the absorber 11, the liquid-permeable top sheet (not shown) arranged on the skin side of the absorber 11, and the liquid-impermeable top sheet arranged on the non-skin side of the absorber 11 Can be exemplified with a back sheet (not shown). The absorber 11 absorbs and retains excrement such as urine, and can be exemplified by a liquid absorbent fiber such as pulp containing a highly absorbent polymer (SAP) formed into a predetermined shape.

<Structure of ventral band member 20 and dorsal band member 30>
The ventral band member 20 and the dorsal band member 30 are each composed of two sheet members such as a non-woven fabric, and here, the sheet member constituting one of the ventral band member 20 and the dorsal band member 30. Is the first sheet and the second sheet, and the sheet members constituting the other band member of the ventral band member 20 and the dorsal band member 30 are the third sheet and the fourth sheet. In the present embodiment, as shown in FIG. 3, the ventral band member 20 (so-called one band member) has the first sheet 21 and the second sheet 22, and the dorsal band member 30 (so-called other band member). ) Has a third sheet 31 and a fourth sheet 32 arranged closer to the wearer's skin than the third sheet 31.

Further, the ventral band member 20 and the dorsal band member 30 have a plurality of

elastic members

23 and 33 that expand and contract in the left-right direction. The first sheet 21, the second sheet 22, the third sheet 31, and the fourth sheet 32 are arranged on the non-skin side of the absorbent body 10. Then, as shown in FIG. 2, the first sheet 21, the second sheet 22, the third sheet 31, and the fourth sheet 32 are welded at both ends 20e and 30e in the left-right direction of the ventral band member 20 and the dorsal band member 30. Etc. are joined.

Conventionally, in the waist opening of an absorbent article such as a diaper 1, the material is often formed by folding back to the inner surface side of the absorbent article at the upper ends of both the ventral side and the dorsal side. The point that it takes is also an issue.

In that respect, as shown in FIG. 3, in the waist circumference portion 2 of the present invention, in the extended state in which the ventral and dorsal band members (20, 30) are extended, the first sheet 21 of the ventral band member 20 is the second. It has a non-skin side portion 21e arranged on the non-skin side of the sheet 22 and a folded portion 21f folded back toward the skin side at the upper end 20en of the ventral band member 20, while the third of the dorsal band member 30. The sheet 31 is arranged on the non-skin side of the fourth sheet 32 and is not folded back. As described above, the ventral band member 20 side, which is one band member of the waist circumference portion 2, has the folded-back portion 21f, so that the aesthetic appearance of the diaper 1 is maintained, and the upper end of the back-side band member 30 on the other side is not folded back. As a result, the amount of material for forming the waist circumference portion 2 can be reduced, and as a result, the cost can be reduced.

When the folded portion 21f is provided on the ventral band member 20 side as described above, the strength of the ventral band member 20 on which the force for pulling up the diaper 1 is easily applied is increased when the diaper 1 is worn while the user is sleeping. Can be kept. Further, in the sleeping state, the urination position of the diaper 1 tends to be closer to the dorsal side, but since the dorsal band member 30 does not fold back, it becomes easier to maintain the air permeability. On the contrary, when the folded-back portion (not shown) is provided on the back-side band member 30 side, the strength is maintained by the folded-back portion even if the back-side band member 30 is grasped and pulled up when the user wears it while standing. be able to. Further, since the urination position is formed on the front side in the standing position, it becomes easier to secure the air permeability because the ventral band member 20 does not have a fold back.

Further, the length of the folded portion 21f in the vertical direction is preferably 25 mm or more. By providing 25 mm or more in the vertical direction, even if the position of the upper end portion of the second sheet 22 is slightly displaced, the folded portion 21f can be folded back toward the skin so as to cover the upper end of the second sheet 22, and the folded portion 21f. The aesthetics of can be maintained.

Further, as shown in FIG. 3, the upper end position 31en of the third sheet 31 and the upper end position 32en of the fourth sheet 32 of the dorsal band member 30 of the present embodiment coincide with each other in the vertical direction, but the upper end positions are the same. 31en and 32en may be displaced in the vertical direction. On the back side band member 30 side that is not folded back, the upper end positions 31en and 32en of the third and fourth sheets are displaced, so that the rigidity of the upper end portion of the back side band member 30 is lowered, and the user wears the diaper 1. It is possible to reduce the discomfort of touching the skin.

Further, the ventral band member 20 which is one band member further has another sheet 24 (see FIGS. 2 and 3) provided so as to overlap the folded-back portion 21f from the skin side. Another sheet 24 is made of a non-woven fabric or the like, has a shorter vertical length than the first sheet 21, and covers the end portion of the absorbent main body 10 in the longitudinal direction. The presence of the other sheet 24 increases the strength of the ventral band member 20 and makes it less likely to be damaged when the diaper 1 is pulled up.

It should be noted that the first sheet 21, the second sheet 22, the third sheet 31, and the fourth sheet 32 preferably have thermoplastic resin fibers. For example, a single fiber of a thermoplastic resin such as polypropylene (PP) or polyethylene (PE) or a composite fiber having a sheath core structure of PP or PE can be exemplified.

Further, it is preferable that the average basis weight of the first sheet 21 is equal to or more than the average basis weight of the second sheet 22, and the average basis weight of the third sheet 31 is equal to or greater than the average basis weight of the fourth sheet 32. The average basis weight here is the average value of the results obtained by measuring the basis weight (weight per unit area) at a plurality of locations (for example, 10 locations) on each of the

sheets

21, 22, 31, and 33. Is the average basis weight of each sheet. In the present embodiment, since it is sufficient to confirm the magnitude relationship between the basis weights of the first sheet 21 and the second sheet 22, and the third sheet 31 and the fourth sheet 32, it is not necessary to obtain an exact value, and the measured value is used. Some errors are acceptable.

The first sheet 21 having a high average basis weight has a non-skin side portion 21e, and similarly, the third sheet 31 having a high average basis weight is a sheet arranged on the non-skin side of the fourth sheet 32. is there. Since the average basis weight of the first sheet 21 and the third sheet 31 having the portion arranged on the non-skin side is high, the waist circumference portion 2 can maintain the strength and is less likely to be torn when the diaper 1 is pulled up. The second sheet 22 and the fourth sheet 32, which are arranged on the skin side and have a low average basis weight, have low rigidity and thus have a good feel on the skin. Further, since the second sheet 22 and the fourth sheet 32 having a low average basis weight have high breathability and moisture permeability, it is easy to promote the discharge of moisture in the diaper 1.

The plurality of

elastic members

23 and 33 are arranged in a vertically aligned state between the first sheet 21 and the second sheet 22 and between the third sheet 31 and the fourth sheet 32, and are arranged on the left and right sides. It is joined by an adhesive such as a hot melt adhesive in a state of being elongated in the direction. As a result, the ventral band member 20 and the dorsal band member 30 are provided with elasticity. Examples of the

elastic members

23 and 33 include thread-like rubber and spandex.

Further, when the adhesives are applied to the

elastic members

23 and 33 and joined, the amount of the adhesive applied to each of the ventral band members 20 and the dorsal band members 30 at the time of manufacturing the diaper 1 is adjusted. The average basis weight of the adhesive applied to the lowermost

elastic members

23n and 33n (FIG. 2) is the adhesive applied to the uppermost

elastic members

23a and 33a (FIG. 2). It is desirable that it be higher than the average basis weight of. Since the

elastic members

23n and 33n are cut at the central portion in the left-right direction by making a cut in the ventral band member 20 and the dorsal band member 30, the cut portion is the above-mentioned adhesive. Is not included in the

elastic members

23n and 33n coated with. Since the

elastic members

23n and 33n located on the lowermost side of each of the ventral band member 20 and the dorsal band member 30 form at least a part of the leg circumference opening LH, the elastic members located on the lowermost side are formed. By increasing the average basis weight of the adhesive with respect to 22n and 33n, the

elastic members

23n and 33n are firmly joined. As a result, the

elastic members

23n and 33n are less likely to come off even if the wearer's legs move.

Further, as shown in FIG. 3, in the ventral band member 20 having the folded-back portion 21f, the upper end 22en of the second sheet 22 is below the elastic member 23a located on the uppermost side of the plurality of elastic members 23. positioned. At the upper end 20en of the ventral band member 20 having the folded-back portion 21f, the elastic member 23 can be joined between the non-skin side portion 21e of the first sheet 21 and the folded-back portion 21f. The second sheet 22 may not be arranged up to the upper end 20en of the member 20. The second sheet 22 may be provided so that the upper end 22en is located below the lower end of the folded-back portion 21f. As a result, the amount of material of the second sheet 22 can be reduced, which leads to cost reduction.

Further, the second sheet 22 of the present embodiment is not arranged up to the upper end 20en of the ventral band member 20 as described above, but the upper end 22en of the second sheet 22 is located on the uppermost side of the plurality of elastic members 23. It may be located above the elastic member 23a that is located. In the ventral band member 20 provided with the folded-back portion 21f, the presence of the second sheet 22 up to the upper end 20en improves the strength of the upper end portion of the ventral band member 22 and makes it less likely to be damaged when the diaper 1 is pulled up.

FIG. 4 is a schematic enlarged view of the back side band member 30 side of FIG. As shown in FIG. 4, in the dorsal band member 30, the elastic member located on the uppermost side of the plurality of elastic members 33 is designated as the first elastic member 33a, and the elastic member located below the first elastic member 33a. Is the second elastic member 33b, the distance L1 from the upper end 30en of the dorsal band member 30 to the first elastic member 33a is longer than the distance L2 from the lower end of the first elastic member 33a to the upper end of the second elastic member 33b. (L1> L2). When the distance L1 is shorter than the distance L2, the first elastic member 33a and the second elastic member 33b are easily affected by the contraction in the left-right direction, and the upper end 30en may contract too much. By making the distance L1 longer than the distance L2, it is less likely to be affected by the contraction of the first elastic member 33a and the second elastic member 33b. As a result, the upper end 30en of the dorsal band member 30 that does not have a folded portion can be easily formed neatly.

=== Second embodiment ===
FIG. 5 is a schematic perspective view of the pants-type disposable diaper 1 according to the second embodiment, and FIG. 6 is a schematic cross-sectional view taken along the line BB of FIG.

In the second embodiment, as shown in FIG. 5, an opening 40 is provided in a part of the waist circumference portion 2, which is mainly different from the first embodiment described above in this respect, and the other points are generally the same. The same is true. Therefore, in the following, this difference will be mainly described, and the same reference numerals will be given to the same configurations, and the description thereof will be omitted.

In the second embodiment, as shown in FIGS. 5 and 6, the ventral band member 20 (one band member) penetrates the non-skin side portion 21e of the first sheet 21 and the second sheet 22. A plurality of provided through holes 40 are provided. The entire area of the folded-back portion 21f of the first sheet 21 is a region where there are no through holes 40 (open holes 40). Further, the folded-back portion 21f overlaps with the plurality of through holes 40 when viewed in the front-rear direction. Further, in the region where the plurality of through holes 40 exist in the ventral band member 20, a plurality of elastic members 23 that expand and contract in the left-right direction are arranged vertically between the first sheet 21 and the second sheet 22. It is joined by an adhesive (not shown). Further, the elastic member 23 is arranged at a position where it does not overlap with the through hole 40. In this way, while improving the air permeability of the ventral band member 20 by providing the through hole 40, there is a possibility that the adhesive used for joining the elastic member 23 may seep out from the through hole 40 to the skin side due to the folded portion 21f. To prevent. As a result, it is possible to reduce the discomfort to the wearer due to the exudation of the adhesive while improving the breathability of the diaper 1.

Further, as shown in FIG. 6, the absorbent main body 10 also has an overlapping region 10a that overlaps with at least a part of the plurality of through holes 40 in the front-rear direction (thickness direction). Then, the skin side surface 21fh of the folded portion 21f of the first sheet 21 and the non-skin side surface 10ah of the overlapping region 10a are joined by the adhesive 50. In this way, the folded-back portion 21f is interposed between the through hole 40 and the absorbent main body 10 when viewed in the front-rear direction (thickness direction), so that the absorbent main body 10 and the ventral band member 20 having the folded-back portion 21f It is possible to prevent the adhesive 50 from seeping out from the skin side to the non-skin side through the through hole 40 when the adhesive 50 is joined. Therefore, the discomfort of the wearer due to the exudation of the adhesive can be reduced.

<Manufacturing method of diaper 1 according to the first embodiment>
FIG. 7 is a schematic view showing a manufacturing flow of the pants-type disposable diaper 1 according to the first embodiment. The manufacturing flow shown in FIG. 7 mainly includes a step S201 of laminating continuous sheets, a step S202 of applying an adhesive, a step S203 of folding back, a step S204 of forming ventral and dorsal strip-shaped continuous sheets, and an absorbent main body. It has a step S205 for joining 10. In the step further below the joining step S205, the diaper 1 in the product state is released by joining the portions corresponding to the left and right ends 20e and 30e of the waist circumference portion 2 and dividing the diapers 1 in the transport direction in product units. It is formed.

Further, in the following description, the transport direction in which the non-skin side continuous sheet 21a and the skin side continuous sheet 22a are transported is also referred to as "MD direction", and the direction intersecting the MD direction is referred to as "CD direction". The MD direction corresponds to the left-right direction of the diaper 1 in the product state (FIG. 1). In this example, the CD direction is horizontal. The CD direction is parallel to the width direction of the non-skin side continuous sheet 21a and the skin side continuous sheet 22a. By the way, the thickness direction of the non-skin side continuous sheet 21a and the skin side continuous sheet 22a (the direction penetrating the paper surface in FIG. 7), the MD direction which is the transport direction, and the CD direction which is the width direction are orthogonal to each other. There is a relationship.

First, in the step S201 of bonding continuous sheets to each other, the material of the diaper 1 is transported at a predetermined transport speed along a predetermined transport direction (MD direction) by an appropriate transport mechanism, and each material is arranged at a predetermined position. To. The "material of the diaper 1" is a state in which a plurality of non-skin side sheets (corresponding to the above-mentioned first sheet 21 and third sheet 31) of the ventral band member 20 and the dorsal band member 30 are connected in the left-right direction (transportation direction). A plurality of non-skin side continuous sheets 21a and skin side sheets (corresponding to the above-mentioned second sheet 22 and fourth sheet 32) of the ventral band member 20 and the dorsal band member 30 in the left-right direction (transportation direction). The skin-side continuous sheet 22a that is continuous in a connected state and the elastic members 23'and 33' that are continuous in a state where a plurality of

elastic members

23 and 33 are connected in the left-right direction. The length of the skin-side continuous sheet 22a in the CD direction is shorter than the length of the non-skin-side continuous sheet 21a in the CD direction. As shown in FIG. 7, a plurality of elastic members 23'and 33' are transported in a state of being extended in the transport direction, and are arranged at predetermined positions from above in the thickness direction of the non-skin side continuous sheet 21a. Then, the skin-side continuous sheet 22a is arranged from above the elastic members 23'and 33'. An adhesive such as hot melt is applied to the elastic members 23'and 33', and the non-skin side continuous sheet 21a, the elastic members 23', 33', and the skin side continuous sheet 22a are adhered to each other. ..

Further, in the bonding step S201, the non-skin side continuous sheet 21a and the skin side continuous sheet are aligned so that the one end 21an of the non-skin side continuous sheet 21a in the CD direction and the one end 22an of the skin side continuous sheet 22a in the CD direction are aligned. A step (S201') for adjusting the position of 22a in the CD direction is provided. In this step, a sensor (not shown) that detects the positions of one end 21an of the non-skin side continuous sheet 21a and one end 22an of the skin side continuous sheet 22a only on one end side (one end 21an, one end 22an side) in the CD direction. By providing, the positions of one end 21an and one end 22an are sensed, and the arrangement positions are adjusted so that the positions of the non-skin side and the skin side

continuous sheets

21a and 22a on one end side in the CD direction are aligned. The ends 21an and 22an are the upper ends of one of the ventral and dorsal band members forming the waistline 2 of the diaper 1 in the product state, and according to the adjusting step S201', the upper ends are the upper ends. To ensure the aesthetics of the upper end.

Then, in the bonding step S201, even when the above-mentioned step S201'for adjusting the position on one end side in the CD direction is not provided, or even when the adjusting step S201'is used, each continuous sheet 21a, There is a possibility that a slight deviation may occur in the arrangement between the 22a. On the other hand, the non-skin side continuous sheet 21a and the skin side continuous sheet 22a are arranged as follows. That is, the distance between one end 21an of the non-skin side continuous sheet 21a and one end 22an of the skin side continuous sheet 22a in the CD direction (in the example of this manufacturing method, since one end 21an and one end 22an are aligned, it is substantially zero). The non-skin side continuous sheet 21a and the skin side continuous so as to be shorter than the distance between the other end 21as of the non-skin side continuous sheet 21a and the other end 22as of the skin side continuous sheet 22a in the CD direction (S1 in FIG. 7). The sheet 22a and the sheet 22a are arranged and bonded together.

The bonded non-skin side continuous sheet 21a and the skin side continuous sheet 22a are further conveyed in the transport direction, and then in the step S202 of applying the adhesive, the skin side surface (upper in the thickness direction) of the skin side continuous sheet 22a. The adhesive 45 is applied to a predetermined position on the side surface).

In the next folding step S203, one end 21an of the non-skin side continuous sheet 21a in the CD direction is not folded, and the other end 21as of the non-skin side continuous sheet 21a in the CD direction is placed on the skin side surface side (that is, the diaper 1 in the product state). Fold it back so that it overlaps the area on the skin side) and the area where the adhesive 45 is applied. It should be noted that the elastic member 23'is not arranged in the band-shaped folded portion 21fa which is the folded portion 21f of the first sheet 21 and is continuous in the transport direction during the bonding step S201. Since the elastic member 23'is not present in the strip-shaped folded portion 21fa, the strip-shaped folded portion 21fa is folded back toward the skin side continuous sheet 22a without shrinking, and the shrinkage of the end formed by the folding is prevented to maintain the aesthetic appearance. it can.

Next, in the step S204 of forming the ventral and dorsal strip-shaped continuous sheets, the non-skin side continuous sheet 21a and the skin side continuous sheet 22a are placed at the center of the non-skin side continuous sheet 21a and the skin side continuous sheet 22a in the CD direction. Cut together at. As a result, one end side in the CD direction becomes the dorsal band-shaped continuous sheet 30a, the other end side in the CD direction becomes the ventral band-shaped continuous sheet 20a, and the ventral band-shaped continuous sheet 20a and the dorsal band-shaped continuous sheet 30a are each a predetermined distance in the CD direction. Transport in the transport direction while arranging them so that they are separated from each other.

Next, in the step S205 for joining the absorbent main body 10, the front upper end portion 10ea of the absorbent main body 10 and the ventral strip-shaped continuous sheet 20a are joined with an adhesive (adhesive 50 in FIG. 6), and similarly, the absorbent body 10 is joined. The rear upper end portion 10eb of the main body 10 and the dorsal strip-shaped continuous sheet 30a are joined with an adhesive. Further, in the joining step S205, the ventral strip-shaped continuous sheet 20a and the dorsal strip-shaped continuous sheet 30a are joined so that a part of the cut side ends 20ah and 30ah is covered by the absorbent main body 10. By joining the absorbent body 10 and the ventral strip-shaped continuous sheet 20a (dorsal strip-shaped continuous sheet 30a) in this way, the cut side ends 20ah and 30ah remain as they are at the lower end of the waist circumference 2 (that is, the leg circumference opening). Part of the part), and at the lower end of each sheet (first sheet 21 and second sheet 22, third sheet 31 and fourth sheet 32) of the ventral and

dorsal band members

20 and 30 Misalignment is less likely to occur. Thereby, the aesthetic appearance of the leg circumference opening LH can be obtained. Further, after the above-mentioned cutting, there is no step of changing the direction so that the cut side ends 20ah and 30ah come to the upper end of the waist circumference portion 2, which leads to cost reduction in the manufacturing process.

According to the manufacturing method having such steps S201 to S205, it is possible to manufacture the diaper 1 which can achieve both the aesthetics of the waist opening BH and the cost reduction.

<Manufacturing method of diaper 1 according to the second embodiment>
FIG. 8 is a schematic cross-sectional view illustrating steps S210 and S211 of the pants-type disposable diaper 1 according to the second embodiment. FIG. 9 is a schematic view showing a manufacturing flow of the diaper 1 according to the second embodiment. The steps S202 to S205 of the second embodiment are basically the same as the steps S202 to S205 of the first embodiment. In order to form the through hole 40 (opening 40) in the second embodiment, the steps (S210, S211) for forming the opening are added in the bonding step S201, and the non-skin side continuous sheet 21a in the same step is added. The arrangement and transport method of the skin-side continuous sheet 22a are also different.

As shown in FIG. 8, in the bonding step S201 in the manufacturing method of the diaper 1 of the second embodiment, the upstream roll 51, the intermediate roll 52, the downstream roll 53, and the pair of transport rolls 54 are provided. It is provided.

A plurality of pins 55 for forming through holes 40 are provided on the outer peripheral surface of the intermediate roll 52. A plurality of recesses 56 for receiving the plurality of pins 55 are provided on the outer peripheral surfaces of the upstream roll 51 and the downstream roll 53, respectively. The plurality of pins 55 may be heated pins 55 or unheated pins 55.

First, the non-skin side continuous sheet 21a is conveyed by the rotation of the upstream roll 51 while being wound around the upstream roll 51. When the non-skin side continuous sheet 21a approaches the intermediate roll 52, a plurality of pins 55 of the intermediate roll 52 are inserted into the non-skin side continuous sheet 21a and penetrate the non-skin side continuous sheet 21a. As a result, a plurality of non-skin side openings 40 are formed in the non-skin side continuous sheet 21a (S210). After that, the non-skin side continuous sheet 21a is handed over from the upstream roll 51 to the intermediate roll 52, and is conveyed by the rotation of the intermediate roll 52 with the pin 55 penetrating.

On the other hand, the skin-side continuous sheet 22a is conveyed by the rotation of the downstream roll 53 while being wound around the downstream roll 53. Further, the continuous elastic members 23'and 33' in the stretched state to which the adhesive is applied are thrown toward the positions where the intermediate roll 52 and the downstream roll 53 approach each other. The elastic members 23'and 33' are passed between the

pins

55 and 55.

Then, at a position where the intermediate roll 52 and the downstream roll 53 approach each other, the skin-side continuous sheet 22a and the non-skin-side continuous sheet 21a have elastic members 23'and 33'intervened between them, and the outer peripheral surface of the intermediate roll 52. It is sandwiched between (a surface other than the pin 55) and an outer peripheral surface (a surface other than the recess 56) of the downstream roll 53. Then, the skin-side continuous sheet 22a and the non-skin-side continuous sheet 21a are joined by the adhesive applied to the elastic members 23'and 33'.

At the same time, the plurality of pins 55 penetrating the non-skin side continuous sheet 21a are inserted toward the skin side continuous sheet 22a and penetrate the skin side continuous sheet 22a. As a result, a plurality of skin-side openings 40 (through holes 40) are formed in the skin-side continuous sheet 22a.

After that, the pin 55 is pulled out from the skin side continuous sheet 22a toward the non-skin side continuous sheet 21a by the rotation of the intermediate roll 52. In this way, the non-skin side continuous sheet 21a and the skin side continuous sheet 22a having the through holes 40 (opening holes 40) are formed. The non-skin side continuous sheet 21a and the skin side continuous sheet 22a are conveyed to the downstream step S202 by a pair of transfer rollers 54.

According to the steps S210 and S211 for forming the holes, the through holes 40 can be formed at the same time in the step S201 of bonding the non-skin side continuous sheet 21a and the skin side continuous sheet 22a, and the cost of the manufacturing process can be reduced. ..

Further, as shown in FIG. 9, in the step S202 of applying the adhesive in the method of manufacturing the diaper 1 of the second embodiment, the skin side surface (upper side surface in the thickness direction) of the skin side continuous sheet 22a is opened on the skin side. The adhesive 45 is applied to the area where the holes 40 do not exist. Then, in the folding step S203, the non-skin side continuous sheet 21a overlaps the region to which the adhesive 45 is applied, and the non-skin side continuous sheet 21a opens the skin side opening 40 from the skin side (in the thickness direction). The other end 21as of the non-skin side continuous sheet 21a is folded back so as to cover it (from above). By folding back the non-skin side continuous sheet 21a so as to overlap the adhesive 45, the adhesive 45 is prevented from seeping out to the skin side (from the opening 40 to the band-shaped folded portion 21fa side). By making it difficult for the adhesive 45 to seep out, it is possible to manufacture the diaper 1 that reduces the discomfort to the wearer due to the seepage.

=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be changed or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

In the above-described second embodiment, the through hole 40 is provided so as to penetrate the non-skin side portion 21e of the first sheet 21 and the second sheet 22, but the first sheet 21 and the second sheet provided on the non-skin side are provided. A plurality of openings 40 may be provided in at least one of the 3 sheets 31 or the second sheet 22 and the fourth sheet 32 provided on the skin side. Breathability is improved by the presence of a plurality of openings 40, and when such openings 40 are provided on the skin side, moisture such as sweat can be easily transferred to the non-skin side, and the holes 40 are provided on the non-skin side. If so, it facilitates the evaporation of water such as sweat.

In the second embodiment described above, the shape of the opening 40 is circular, but the shape is not limited to the circular shape shown in the figure, and may be an elliptical shape or various other shapes.

1 diaper (absorbent article), 2 waistline, 10 absorbent body,
10a overlapping area, 10ah non-skin side, 10ea front upper end,
10 eb posterior upper end, 11 absorber, 20 ventral band member,
20a ventral band-shaped continuous sheet, 20ah end, 20e end,
20en upper end, 21 first sheet, 21a non-skin side continuous sheet,
21an one end, 21as other end, 21e non-skin side part, 21f folded part,
21fa band-shaped folded part, 21fh skin side surface, 22 second sheet,
22a skin side continuous sheet, 22an one end, 22as other end, 22en upper end,
23 elastic member, 23'elastic member, 23a elastic member, 23n elastic member,
24 Another sheet, 30 Dorsal band member, 30a Dorsal band-shaped continuous sheet,
30ah end, 30e end, 30en top,
31 3rd sheet, 31en top position,
32 4th sheet, 32en top position,
33 elastic member, 33'elastic member, 33a elastic member (first elastic member),
33b elastic member (second elastic member), 33n elastic member,
40 holes (through holes, non-skin side holes, skin side holes), 45 adhesives, 50 adhesives,
51 upstream roll, 52 intermediate roll, 53 downstream roll, 54 transport roller,
55 pins, 56 recesses,
BH waist opening, C10 center position (predetermined position),
L1 distance, L2 distance, LH leg opening, S1 distance

Claims

It has a vertical direction, a horizontal direction, and a front-back direction that intersect each other.
Absorbent body that absorbs liquid and
A ventral band member provided along the left-right direction and joined to the front upper end portion of the absorbent body,
It has a dorsal band member provided along the left-right direction and joined to the rear upper end portion of the absorbent body.
One of the ventral band member and the dorsal band member has a first sheet and a second sheet.
The other band member of the ventral band member and the dorsal band member has a third sheet and a fourth sheet.
The first sheet, the second sheet, the third sheet, and the fourth sheet are absorbent articles joined at both ends of the ventral band member and the dorsal band member in the left-right direction.
In the extended state in which the ventral band member and the dorsal band member are stretched,
The first sheet has a non-skin side portion arranged on the non-skin side of the second sheet and a folded portion folded back toward the skin side at the upper end of the one member.
The third sheet is an absorbent article which is arranged on the non-skin side of the fourth sheet and is not folded back.
The absorbent article according to claim 1.
An absorbent article characterized in that the upper end position of the third sheet and the upper end position of the fourth sheet are displaced in the vertical direction.
The absorbent article according to claim 1 or 2.
The one band member is an absorbent article characterized by further having another sheet provided so as to overlap the folded portion from the skin side.
The absorbent article according to any one of claims 1 to 3.
The average basis weight of the first sheet is equal to or greater than the average basis weight of the second sheet.
An absorbent article characterized in that the average basis weight of the third sheet is equal to or greater than the average basis weight of the fourth sheet.
The absorbent article according to any one of claims 1 to 4.
An absorbent article characterized in that a plurality of openings are provided in at least one of the first sheet and the third sheet, or the second sheet and the fourth sheet.
The absorbent article according to any one of claims 1 to 5.
The one band member has a plurality of through holes provided so as to penetrate the non-skin side portion of the first sheet and the second sheet.
The folded-back portion is a region where the through holes do not exist, and the through holes do not exist.
The folded portion overlaps with the plurality of through holes when viewed in the front-rear direction.
A plurality of elastic members that expand and contract in the left-right direction are joined by an adhesive between the first sheet and the second sheet in a state of being arranged in the up-down direction.
An absorbent article characterized by that.
The absorbent article according to claim 6.
The absorbent body has an overlapping region that overlaps at least a part of the plurality of through holes when viewed in the front-rear direction.
An absorbent article characterized in that a part of the skin side surface of the folded portion and the non-skin side surface of the overlapping region are joined by an adhesive.
The absorbent article according to any one of claims 1 to 7.
A plurality of elastic members that expand and contract in the left-right direction are joined to the first sheet and the second sheet by an adhesive in a state of being arranged in the up-down direction.
A plurality of elastic members that expand and contract in the left-right direction are joined to the third sheet and the fourth sheet by an adhesive in a state of being arranged in the up-down direction.
In each of the ventral band member and the dorsal band member, the average basis weight of the adhesive applied to the elastic member located on the lowermost side is the average basis weight of the adhesive applied to the elastic member located on the uppermost side. Absorbent article characterized by being higher than.
The absorbent article according to claim 8.
An absorbent article characterized in that, in the one band member, the upper end of the second sheet is located below the elastic member located on the uppermost side of the plurality of elastic members.
The absorbent article according to claim 8.
An absorbent article characterized in that, in the one band member, the upper end of the second sheet is located above the elastic member located at the uppermost side of the plurality of elastic members.
The absorbent article according to claim 8.
In the other band member, assuming that the elastic member located on the uppermost side of the plurality of elastic members is the first elastic member and the elastic member located on the lower side of the first elastic member is the second elastic member.
An absorbent article characterized in that the distance from the upper end of the other band member to the first elastic member is longer than the distance from the lower end of the first elastic member to the upper end of the second elastic member.
An absorbent main body that has a vertical direction, a horizontal direction, and a front-back direction that intersect each other and absorbs liquid, and a ventral band member that is provided along the left-right direction and is joined to the front upper end portion of the absorbent main body. A method for manufacturing an absorbent article, which is provided along the left-right direction as a member separate from the ventral band member and has a dorsal band member joined to the rear upper end portion of the absorbent body.
The non-skin side continuous sheet which is the non-skin side sheet of the ventral band member and the dorsal band member, and the skin side sheet of the ventral band member and the dorsal band member which are continuous in the transport direction, and the transport direction The intersecting CD-direction length is shorter than the CD-direction length of the non-skin-side continuous sheet, and the skin-side continuous sheet continuous in the transport direction is combined with one end of the non-skin-side continuous sheet in the CD direction. With the non-skin side continuous sheet so that the distance from one end of the skin side continuous sheet is shorter than the distance between the other end of the non-skin side continuous sheet and the other end of the skin side continuous sheet in the CD direction. The process of laminating the skin-side continuous sheet and
A step of folding the other end of the non-skin side continuous sheet in the CD direction toward the skin side of the absorbent article without folding back one end of the non-skin side continuous sheet in the CD direction.
The non-skin side continuous sheet and the skin side continuous sheet bonded together are cut together at the central portion of the non-skin side continuous sheet and the skin side continuous sheet in the CD direction, and the ventral band-shaped continuous sheet and the dorsal side are cut together. The process of forming a strip-shaped continuous sheet and
Absorption characterized by having a step of joining the front upper end portion of the absorbent body and the ventral strip-shaped continuous sheet, and joining the rear upper end portion of the absorbent body and the dorsal strip-shaped continuous sheet. Manufacturing method of sex goods.
The method for producing an absorbent article according to claim 12.
The non-skin side continuous sheet or the skin side continuous sheet in the CD direction so that the one end of the non-skin side continuous sheet in the CD direction and the one end of the skin side continuous sheet in the CD direction are aligned with each other. A method for producing an absorbent article, which comprises a step of adjusting a position.
The method for producing an absorbent article according to claim 12 or 13.
In the joining step, the absorbent article is manufactured so that the ventral strip-shaped continuous sheet and a part of the cut end of the dorsal strip-shaped continuous sheet are joined so as to be covered by the absorbent body. Method.
The method for producing an absorbent article according to any one of claims 12 to 14.
In the bonding process,
A step of penetrating a pin through the non-skin side continuous sheet to form a non-skin side opening in the non-skin side continuous sheet,
It has a step of penetrating the pin in a state of penetrating the non-skin side continuous sheet through the skin side continuous sheet to form a skin side opening in the skin side continuous sheet.
A method for producing an absorbent article, which comprises folding back the other end of the non-skin side continuous sheet so that the non-skin side continuous sheet covers the skin side opening from the skin side in the folding step.
The method for producing an absorbent article according to claim 15.
Prior to the folding step, there is a step of applying an adhesive to a region of the skin side surface of the skin side continuous sheet where the skin side opening does not exist.
A method for producing an absorbent article, which comprises folding back the other end of the non-skin side continuous sheet so that the non-skin side continuous sheet overlaps the region to which the adhesive is applied in the folding step.