JP7458714B2 - Absorbent article and method for manufacturing the absorbent article - Google Patents

Description

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

An example of the absorbent article is a pants-type diaper. Patent Document 1 discloses a pants-type absorbent article in which a sheet material constituting the ventral and dorsal exterior bodies has a folded portion that is folded back toward the inner surface of the absorbent article along the peripheral edge of the waist opening. has been done.

JP2013-116196

In the pants-type absorbent article described in Patent Document 1, both the ventral and dorsal exterior bodies at the waist opening are formed by folding back materials, which poses the problem of increased material costs due to the folding back.

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to provide an absorbent article that can reduce costs while maintaining the aesthetics of the end of the waist opening. It is about providing.

The main invention for achieving the above purpose is:
It has a vertical direction, a horizontal direction, and a front-back direction that intersect with each other,
an absorbent body that absorbs liquid;
a ventral band member provided along the left-right direction and joined to the front upper end of the absorbent main body;
a backside band member provided along the left-right direction and joined to the rear upper end of the absorbent main body;
One of the ventral band members and the dorsal band member includes a first sheet and a second sheet separate from the first sheet,
The other band member of the ventral band member and the dorsal band member has a third sheet and a fourth sheet separate from the third sheet,
The first sheet, the second sheet, the third sheet, and the fourth sheet are an absorbent article joined at both ends of the ventral band member and the dorsal band member in the left-right direction,
In an extended state in which the ventral band member and the dorsal band member are extended,
The first sheet has a non-skin side portion disposed 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 arranged on a non-skin side than the fourth sheet and is not folded back,
In the one band member, the upper end of the second sheet is located below an uppermost elastic member among the plurality of elastic members,
The uppermost elastic member is provided between the non-skin side portion and the folded portion of the first sheet, and the uppermost elastic member is arranged between the non-skin side portion and the folded portion of the first sheet. This absorbent article is characterized in that it is bonded to the skin side of the skin-side portion and the non-skin side of the folded portion with an adhesive.

Also, there is provided a method for manufacturing an absorbent article having an absorbent main body that absorbs liquid and has a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other, an abdominal side belt member that is provided along the horizontal direction and joined to a front upper end portion of the absorbent main body, and a back side belt member that is provided along the horizontal direction as a separate member from the abdominal side belt member and joined to a rear upper end portion of the absorbent main body,
a step of bonding a non-skin-side continuous sheet which is continuous in a conveying direction and which becomes the non-skin-side sheet of the abdominal side belt member and the back side belt member, and a skin-side continuous sheet which is continuous in the conveying direction and becomes the skin-side sheet of the abdominal side belt member and the back side belt member and has a length in a CD direction intersecting the conveying direction shorter than a length in the CD direction of the non-skin-side continuous sheet, such that a distance between one end of the non-skin-side continuous sheet and one end of the skin-side continuous sheet in the CD direction is shorter than a 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;
a step of folding back the other end of the non-skin side continuous sheet in the CD direction to a side that will be the skin side of the absorbent article, while leaving the one end of the non-skin side continuous sheet in the CD direction unfolded;
cutting the laminated non-skin side continuous sheet and the skin side continuous sheet together at the center in the CD direction of the non-skin side continuous sheet and the skin side continuous sheet to form a ventral side belt-like continuous sheet and a dorsal side belt-like continuous sheet;
a step of joining a front upper end portion of the absorbent main body to the abdominal side belt-like continuous sheet, and joining a rear upper end portion of the absorbent main body to the dorsal side belt-like continuous sheet;
having
In the bonding step,
penetrating the non-skin side continuous sheet with a pin to form a non-skin side aperture in the non-skin side continuous sheet;
a step of penetrating the pin, which has penetrated the non-skin side continuous sheet, into the skin side continuous sheet to form a skin side aperture in the skin side continuous sheet;
having
In the folding back step, the other end of the non-skin side continuous sheet is folded back so that the non-skin side continuous sheet covers the skin side apertures from the skin side.
The present invention relates to a method for producing an absorbent article.
Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article that can reduce costs while maintaining the aesthetics of the end of the waist opening.

FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 according to a first embodiment. FIG. 1 is a schematic plan view of the diaper 1 in an unfolded and stretched state according to the first embodiment, viewed from the skin side. 3 is a schematic cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a schematic enlarged view of the back-side belt member 30 side of FIG. 3. FIG. FIG. 11 is a schematic perspective view of a pants-type disposable diaper 1 according to a second embodiment. 6 is a schematic cross-sectional view taken along line BB in FIG. 5. FIG. FIG. 1 is a schematic diagram showing a manufacturing flow of the pants-type disposable diaper 1 according to the first embodiment. 11 is a schematic cross-sectional view illustrating steps S210 and S211 of the pants-type disposable diaper 1 according to the second embodiment. FIG. FIG. 2 is a schematic diagram showing a manufacturing flow of a pants-type disposable diaper 1 according to a second embodiment.

At least the following points will become apparent from the description of this specification and the accompanying drawings.
The present invention relates to a diaper diaper, and a diaper bag, comprising: an absorbent body having a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other and that absorbs liquid; an abdominal side belt member that is provided along the horizontal direction and joined to a front upper end portion of the absorbent body; and a back side belt member that is provided along the horizontal direction and joined to a rear upper end portion of the absorbent body, wherein one of the abdominal side belt member and the back side belt member has a first sheet and a second sheet, and the other of the abdominal side belt member and the back side belt member has a third sheet and a fourth sheet, and the first sheet, the The second sheet, the third sheet, and the fourth sheet are joined at both left-right ends of the abdominal side belt member and the back side belt member, and in an extended state in which the abdominal side belt member and the back side belt member are extended, the first sheet has a non-skin side portion that is positioned away from the skin side of the second sheet and a folded-back portion that is folded back to the skin side at the upper end of one of the members, and the third sheet is positioned away from the skin side of the fourth sheet and is not folded back.

According to such an absorbent article, one of the belt members in the waist region, that is, the ventral side band member side, has a folded-back portion, thereby maintaining the aesthetics of the absorbent article, while the upper end of the dorsal side band member on the other side is folded back. By not forming the body part, it is possible to reduce the amount of materials used to form the waist portion, and as a result, it is possible to reduce costs.

In such an absorbent article, it is desirable that the upper end position of the third sheet and the upper end position of the fourth sheet be shifted in the vertical direction.

According to such an absorbent article, since the upper end position of each sheet is shifted on the side of the unfolded band member, the rigidity of the end portion is lowered, and the uncomfortable feeling when worn can be reduced.

In such an absorbent article, it is preferable that the one of the belt members further has another sheet arranged so as to overlap the folded portion from the skin side.

With such an absorbent article, the presence of the separate material (separate sheet) further increases its strength, making it less likely to break when the absorbent article is pulled up.

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

According to such an absorbent article, since the average basis weight of the first sheet and the third sheet disposed on the non-skin side is high, the strength can be maintained and the absorbent article becomes difficult to tear when being pulled up. The second sheet and the fourth sheet, which have a low average basis weight, have low rigidity and therefore feel good to the touch, and also have high air permeability and moisture permeability, so they can promote the drainage of moisture within the absorbent article. can.

In such an absorbent article, it is desirable that at least one of the first sheet and the third sheet, or the second sheet and the fourth sheet, has a plurality of openings.

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

In such an absorbent article, it is desirable that the one belt 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 through hole non-existent area where the plurality of through holes are not present, the folded-back portion overlaps the plurality of through holes when viewed in the front-rear direction, and 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 aligned in the up-down direction.

According to such an absorbent article, the through-holes improve air permeability, and the folded portions prevent the adhesive from seeping out from the through-holes. This reduces discomfort to the wearer due to adhesive seepage while ensuring breathability.

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

In this type of absorbent article, the through holes improve breathability, while the folded-back portion is interposed between the through holes and the absorbent body when viewed in the front-to-back direction, which prevents adhesive from seeping out onto the non-skin side when the absorbent body is joined to the ventral or dorsal belt member. This reduces the discomfort felt by the wearer due to adhesive seeping out.

In such an absorbent article, a plurality of elastic members that stretch in the left-right direction are bonded between the first sheet and the second sheet with an adhesive in a state lined up in the vertical direction, and a plurality of elastic members that stretch in the left-right direction are bonded between the third sheet and the fourth sheet with an adhesive in a state lined up in the vertical direction, and it is desirable that the average basis weight of the adhesive applied to the lowermost elastic member in each of the abdominal side belt member and the dorsal side belt member is higher than the average basis weight of the adhesive applied to the uppermost elastic member.
An absorbent article characterized by:

In this absorbent article, the elastic members located at the lowest position on each of the abdominal belt member and the dorsal belt member form at least a part of the leg openings, and the high average basis weight of the adhesive on the elastic members located at the lowest position ensures that the elastic members are firmly bonded, making them less likely to come off even when the wearer's legs move.

In such an absorbent article, in the one band member, the upper end of the second sheet is preferably located below an uppermost elastic member of the plurality of elastic members. .

According to such an absorbent article, in one of the band members having a folded part, even if the second sheet is not arranged up to the upper end of the band member, the folded part and the non-skin side part of the first sheet overlap at the upper end. It is possible to join an elastic member between the parts. By reducing the amount of second sheets arranged in this way, cost reduction can be achieved.

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

According to such an absorbent article, the presence of the second sheet up to the upper end of one of the band members having the folded portion improves the strength of the upper end, making it less likely to be damaged when the absorbent article is pulled up.

In such an absorbent article, in the other band member, the uppermost elastic member of the plurality of elastic members is a first elastic member, and the elastic member is located below the first elastic member. is the second elastic member, the distance from the upper end of the other band member to the first elastic member is preferably 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 Also, it is susceptible to the contraction of the second elastic member, and there is a risk that the upper edge may contract 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 made less susceptible to the effects of contraction of the elastic member, The upper edge of the unfolded band member is easily formed neatly.

an absorbent body that absorbs liquid and has a vertical direction, a left-right direction, and a front-back direction that intersect with each other; and a ventral band member that is provided along the left-right direction and joined to the front upper end of the absorbent body. , a method for manufacturing an absorbent article having a dorsal band member provided along the left-right direction as a separate member from the abdominal band member and joined to the rear upper end of the absorbent body, the method comprising: A non-skin side continuous sheet that is continuous in the conveyance direction and serves as a non-skin side sheet of the side band members and the dorsal side band member, and a non-skin side continuous sheet that becomes the skin side sheet of the ventral side band member and the dorsal side band member and intersects with the conveyance direction. A skin-side continuous sheet that is continuous in the conveyance direction and whose length in the CD direction is shorter than the length of the non-skin-side continuous sheet in the CD direction is connected to one end of the non-skin-side continuous sheet in the CD direction and the skin side. The non-skin side continuous sheet and the skin side continuous sheet are arranged 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. a step of bonding the non-skin side continuous sheet to the skin side of the absorbent article; and without folding back the one end of the non-skin side continuous sheet in the CD direction, attaching the other end of the non-skin side continuous sheet in the CD direction to the skin side of the absorbent article. a step of folding the pasted non-skin side continuous sheet and the skin side continuous sheet together at the center of the CD direction of the non-skin side continuous sheet and the skin side continuous sheet; forming a ventral strip continuous sheet and a dorsal strip continuous sheet, joining the front upper end of the absorbent main body and the ventral strip continuous sheet, and joining the rear upper end of the absorbent main body and the dorsal This is a method for manufacturing an absorbent article, comprising the step of joining a continuous belt-like sheet.

According to such a manufacturing method, it is possible to manufacture an absorbent article that can reduce costs while maintaining the aesthetics of the end of the waist opening.

In the method for manufacturing such an absorbent article, the non-skin side continuous sheet is produced such 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.

This manufacturing method aligns the ends that will become the upper ends on one side of the waist opening, ensuring the aesthetics of those ends.

In the method for manufacturing such an absorbent article, in the step of joining, the absorbent main body covers a part of the cut side ends of the ventral continuous belt-like sheet and the back continuous belt-like sheet. It is desirable to do so.

According to such a manufacturing method, the cut side directly constitutes the lower end of the trunk section (i.e., part of the leg opening), and it is difficult for the sheets of each band member to shift at the lower end. Become. Thereby, aesthetics of the leg opening can be achieved. Moreover, since there is no step such as changing the orientation of the cut end so that the cut end is at the upper end of the waist portion after cutting, the cost of the manufacturing process can be reduced.

The method for manufacturing such an absorbent article includes a step of penetrating the non-skin side continuous sheet with a pin to form a non-skin side opening in the non-skin side continuous sheet in the bonding step; forming a skin-side opening in the skin-side continuous sheet by passing the pin penetrating the skin-side continuous sheet through the skin-side continuous sheet, and in the folding step, the It is desirable that the other end of the non-skin side continuous sheet is folded back so that the non-skin side continuous sheet covers the skin side openings from the skin side.

According to such a manufacturing method, the 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.

The method for manufacturing such an absorbent article includes, before the folding step, applying an adhesive to a region of the skin side surface of the skin-side continuous sheet where the skin-side openings do not exist, and the folding step Then, it is desirable to fold back the other end of the non-skin side continuous sheet so that the non-skin side continuous sheet overlaps the area where the adhesive is applied.

This manufacturing method prevents the adhesive from seeping out onto the skin side by folding back the non-skin side continuous sheet so that it overlaps the adhesive. By making it less likely to seep out, it is possible to manufacture an absorbent article that reduces discomfort to the wearer caused by seeping out.

===First embodiment===
EMBODIMENT OF THE INVENTION Hereinafter, embodiments will be described using a pants-type disposable diaper for infants as an example of an absorbent article according to the present invention. However, the absorbent article according to the present invention is not limited to the above, and can also be applied to disposable diapers for adults, shorts-type sanitary napkins, tape-type disposable diapers that are attached to the wearer with hook tape, and the like.

<Configuration 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 a first embodiment. FIG. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state according to the first embodiment, viewed from the skin side. FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. 2.

This diaper 1, in a pants-like state before being worn as shown in FIG. have. In addition, regarding the vertical direction, the upper side corresponds to the wearer's waist opening side, and the lower side corresponds to the wearer's crotch side. In addition, in the front-rear direction, the front side corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's back side.

In the pants-shaped state shown in FIG. 1, the diaper 1 includes an absorbent main body 10 that absorbs liquid, a ventral band member 20 provided along the left-right direction, and a ventral band member 20 that is located behind the ventral band member 20 and It has a back side band member 30 provided along the direction. The absorbent main body 10 is provided as a crotch area between the ventral band member 20 and the dorsal band member 30. The ventral band member 20 and the dorsal band member 30 together form a waist opening BH on the upper side in the vertical direction, and also serve as a waist portion 2 that is applied to the wearer's waist.

Further, each end 20e, 20e of the ventral band member 20 in the left-right direction and each end 30e, 30e of the corresponding dorsal band member 30 in the left-right direction are joined by welding or the like. As a result, the ventral band member 20 and the dorsal band member 30 work together with the absorbent main body 10 to form one leg opening LH, LH on the lower side and on both sides in the left and right direction, respectively.

The "unfolded state" refers to the state in which the diaper 1 is unfolded on a flat surface by undoing the connections on both the left and right sides of the pants-type diaper 1 in Fig. 1 to separate the abdominal belt member 20 and the rear belt member 30 and opening the diaper 1 vertically. The "stretched state" refers to the state in which the product (diaper 1) is stretched without wrinkles, specifically, the state in which each of the components constituting the diaper 1 (e.g., the absorbent body 10, abdominal belt member 20, etc.) is stretched to the extent that its dimensions match or are close to the dimensions of the individual components.

In the unfolded state, the diaper 1 has three directions that are orthogonal to each other: a longitudinal direction, a left-right direction, and a thickness direction (in FIG. 2, a direction penetrating the paper surface). Note that the longitudinal direction is along the above-mentioned up-down direction. 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 opening BH side), and the inner side in the longitudinal direction corresponds to the lower side in the vertical direction (the crotch side). Since the longitudinal direction and the vertical direction are similar to each other, in the following, for convenience of explanation, the vertical direction may be used instead of the longitudinal direction even in this unfolded state. . On the other hand, the left-right direction has the same meaning as the left-right direction in the pants-type state described above. In addition, 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 opposite non-skin side.

In the diaper 1 in the unfolded state shown in FIG. 2, the absorbent body 10 is hung between the abdominal belt member 20 and the rear belt member 30 in the longitudinal direction, while the front upper end 10ea of the absorbent body 10 is joined and fixed to the abdominal belt member 20, and the rear upper end 10eb of the absorbent body 10 is joined and fixed to the rear belt member 30. As a result, the external shape is generally H-shaped in plan view. From this state, the diaper 1 is folded in half at a predetermined position C10 in the longitudinal direction of the absorbent body 10 (the central position C10 of the diaper 1 in the longitudinal direction) as the folding position, and the left and right ends 20e, 30e of the abdominal and rear belt members 20, 30 are joined together as described above, to form the pants-type diaper 1 shown in FIG. 1.

The absorbent body 10 includes an absorbent body 11, a liquid-permeable top sheet (not shown) disposed closer to the skin than the absorbent body 11, and a liquid-impermeable top sheet disposed closer to the non-skin side than the absorbent body 11. An example of this is a back sheet (not shown). The absorbent body 11 absorbs and retains excreta such as urine, and can be exemplified by liquid absorbent fibers such as pulp containing super absorbent polymer (SAP) molded into a predetermined shape.

<Configuration 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 nonwoven fabric, and here, the sheet member constituting one of the ventral band member 20 and the dorsal band member 30 is used. are referred to as a first sheet and a second sheet, and sheet members constituting the other of the ventral band member 20 and the dorsal band member 30 are referred to as a third sheet and a fourth sheet. In this embodiment, as shown in FIG. 3, a ventral band member 20 (so-called one band member) has a first sheet 21 and a second sheet 22, and a dorsal band member 30 (so-called the other band member) has a first sheet 21 and a second sheet 22. ) includes 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 closer to the non-skin side than the absorbent main body 10. 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 and right direction of the ventral band member 20 and the dorsal band member 30. It is joined by etc.

Conventionally, the waist opening of an absorbent article such as a diaper 1 is often formed by folding material back toward the inner surface of the absorbent article at the upper ends of both the ventral and dorsal sides, but the folding reduces the cost of the material. This is also an issue.

In this regard, as shown in FIG. 3, in the waist portion 2 of the present invention, in the stretched state in which the ventral and dorsal band members (20, 30) are extended, the first sheet 21 of the ventral band member 20 is It has a non-skin side portion 21e that is arranged on the non-skin side of the sheet 22 and a folded portion 21f that is folded back toward the skin side at the upper end 20en of the ventral side band member 20. The sheet 31 is arranged closer to the non-skin side than the fourth sheet 32 and is not folded back. In this way, by having the folded portion 21f on the side of the ventral band member 20, which is one band member of the waist portion 2, the aesthetics of the diaper 1 can be maintained, while the upper end of the dorsal side band member 30 on the other side is not folded back. By doing so, the amount of materials for forming the waist portion 2 can be reduced, and as a result, costs can be reduced.

In the case where the folded portion 21f is provided on the side of the ventral band member 20 as described above, the strength of the ventral band member 20, which is easily subjected to the force of pulling up the diaper 1 when the user puts on the diaper 1 while sleeping, is reduced. can be kept. Furthermore, while the diaper 1 is in a sleeping state, the urinating position of the diaper 1 tends to be closer to the back side, but since the back band member 30 is not folded back, breathability can be easily maintained. On the other hand, when a folded part (not shown) is provided on the side of the back side band member 30, the strength is maintained by the folded part even if the user grabs and pulls up the back side band member 30 when wearing it while standing. be able to. In addition, since the urination position is formed on the front side in the standing position, the absence of folds in the ventral band member 20 makes it easier to ensure ventilation.

The vertical length of the folded portion 21f is preferably 25 mm or more. By providing a vertical length of 25 mm or more, even if the position of the upper end of the second sheet 22 is slightly misaligned, the folded portion 21f can be folded back toward the skin to cover the upper end of the second sheet 22, and the aesthetics of the folded portion 21f 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 back side band member 30 of this embodiment match in the vertical direction; 31en and 32en may be shifted in the vertical direction. On the side of the back side band member 30 that is not folded back, the upper end positions 31en and 32en of each third sheet and fourth sheet are shifted, so that the rigidity of the upper end of the back side band member 30 is reduced, and the user wears the diaper 1. It is possible to reduce the discomfort caused by touching the skin.

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

Note that the first sheet 21, the second sheet 22, the third sheet 31, and the fourth sheet 32 preferably contain thermoplastic resin fibers. Examples include single fibers of thermoplastic resins such as polypropylene (PP) and polyethylene (PE), and composite fibers such as a sheath-core structure of PP and PE.

Further, it is preferable that the average basis weight of the first sheet 21 is equal to or greater 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 refers to the average value of the results obtained by measuring the basis weight (weight per unit area) at multiple locations (for example, 10 locations) on each of the sheets 21, 22, 31, and 33. Let be the average basis weight of each sheet. In this 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, there is no need to obtain exact values, and it is not necessary to use the measured values. Some errors are allowed.

The first sheet 21, which has a high average basis weight, has a non-skin side portion 21e, and similarly, the third sheet 31, which has a high average basis weight, is a sheet that is arranged on the non-skin side of the fourth sheet 32. The high average basis weight of the first sheet 21 and the third sheet 31, which have portions arranged on the non-skin side, allows the waist portion 2 to maintain its strength and makes it less likely to tear when the diaper 1 is pulled up. The second sheet 22 and the fourth sheet 32, which are arranged on the skin side but have a low average basis weight, have low rigidity and therefore a good feel against the skin. Furthermore, the second sheet 22 and the fourth sheet 32, which have a low average basis weight, are highly breathable and moisture permeable, which makes it easier to promote the discharge of moisture from within the diaper 1.

The plurality of elastic members 23 and 33 are arranged in a vertically lined manner between the first sheet 21 and the second sheet 22 and between the third sheet 31 and the fourth sheet 32, and are arranged side by side in the left and right directions. It is bonded with an adhesive such as a hot melt adhesive while being stretched in the direction. Thus, the ventral band member 20 and the dorsal band member 30 are given elasticity. In addition, as the elastic members 23 and 33, thread-like rubber, spandex, etc. can be illustrated.

Furthermore, when applying adhesive to each of the elastic members 23 and 33 to join them, the amount of adhesive applied to each of the elastic members in the ventral band member 20 and the dorsal band member 30 during manufacture of the diaper 1 is adjusted. etc., the average basis weight of the adhesive applied to the lowermost elastic members 23n, 33n (FIG. 2) is the same as the average basis weight of the adhesive applied to the uppermost elastic members 23a, 33a (FIG. 2). It is desirable that the average basis weight is higher than the average basis weight of In addition, since the elastic members 23n and 33n are cut by making a cut or the like in the ventral band member 20 and the dorsal band member 30 at the center portion in the left-right direction, the cut portions are coated with the above-mentioned adhesive. It is not included in the elastic members 23n and 33n coated with . In each of the ventral band member 20 and the dorsal band member 30, the lowermost elastic members 23n and 33n form at least a part of the leg opening LH, so the lowermost elastic members 23n and 33n form at least a part of the leg opening LH. By increasing the average basis weight of the adhesive for 22n and 33n, the elastic members 23n and 33n are firmly joined. This makes it difficult for the elastic members 23n, 33n 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 portion 21f, the upper end 22en of the second sheet 22 is located below the elastic member 23a located at 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 portion 21f, it is possible to join the elastic member 23 between the non-skin side portion 21e of the first sheet 21 and the folded portion 21f. The second sheet 22 may not be arranged up to the upper end 20en of the member 20. Note that the second sheet 22 may be provided such that the upper end 22en is located below the lower end of the folded portion 21f. Thereby, the amount of materials for the second sheet 22 can be reduced, leading to cost reduction.

Further, the second sheet 22 of this 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 at the uppermost side of the plurality of elastic members 23. It may be located above the elastic member 23a. The presence of the second sheet 22 up to the upper end 20en in the ventral band member 20 provided with the folded portion 21f improves the strength of the upper end of the ventral band member 22, making it less likely to be damaged when the diaper 1 is pulled up.

FIG. 4 is a schematic enlarged view of the dorsal band member 30 side of FIG. 3. As shown in FIG. 4, in the back side band member 30, the uppermost elastic member among the plurality of elastic members 33 is a 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 back side 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). If the distance L1 is shorter than the distance L2, the first elastic member 33a and the second elastic member 33b are susceptible to contraction in the left-right direction, and there is a risk that the upper end 30en will contract too much. By making the distance L1 longer than the distance L2, it is made less susceptible to the effects of contraction of the first elastic member 33a and the second elastic member 33b. Thereby, the upper end 30en of the back side 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 a pants-type disposable diaper 1 according to the second embodiment, and FIG. 6 is a schematic cross-sectional view taken along line BB of FIG.

In the second embodiment, as shown in FIG. 5, an opening 40 is provided in a part of the waist portion 2, and the second embodiment differs from the above-described first embodiment mainly in this point, and other points are generally the same. The same is true. Therefore, in the following, this difference will be mainly explained, similar structures will be given the same reference numerals, and the explanation thereof will be omitted.

In the second embodiment, as shown in FIGS. 5 and 6, the ventral band member 20 (one band member) has a structure that extends through the non-skin side portion 21e of the first sheet 21 and the second sheet 22. A plurality of through holes 40 are provided. The entire folded portion 21f of the first sheet 21 is a through-hole non-existence region where a plurality of through-holes 40 (openings 40) are not present. Furthermore, the folded portion 21f overlaps with the plurality of through holes 40 when viewed in the front-rear direction. Further, in the area where the plurality of through holes 40 are present in the ventral band member 20, a plurality of elastic members 23 that expand and contract in the left-right direction are arranged in the vertical direction between the first sheet 21 and the second sheet 22. They are joined by an adhesive (not shown). Further, the elastic member 23 is arranged at a position that does not overlap the through hole 40. In this way, the provision of the through hole 40 improves the breathability of the ventral band member 20, while the folded portion 21f prevents the possibility that the adhesive used to join the elastic member 23 may seep out from the through hole 40 to the skin side. prevent. As a result, while improving the breathability of the diaper 1, discomfort to the wearer due to adhesive seepage can be reduced.

Further, as shown in FIG. 6, the absorbent main body 10 also has an overlapping region 10a that overlaps at least a portion of the plurality of through holes 40 when viewed in the front-back 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 an adhesive 50. By interposing the folded portion 21f between the through hole 40 and the absorbent main body 10 when viewed in the front-rear direction (thickness direction) in this way, the absorbent main body 10 and the ventral band member 20 having the folded portion 21f can be separated. When these are bonded together, 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. Therefore, the wearer's discomfort caused by the adhesive seeping out can be reduced.

<Method for manufacturing diaper 1 according to first embodiment>
FIG. 7 is a schematic diagram 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 pasting continuous sheets together, 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. The process includes step S205 of joining 10. In a step further below the joining step S205, the diaper 1 in the product state is joined by joining the portions corresponding to the left and right ends 20e and 30e of the waist portion 2, and dividing into product units in the transport direction. It is formed.

In the following description, the conveyance direction in which the non-skin side continuous sheet 21a and the skin side continuous sheet 22a are conveyed is also referred to as the "MD direction", and the direction intersecting the MD direction is referred to as the "CD direction". Further, 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 oriented horizontally. Further, the CD direction is parallel to the width direction of the non-skin side continuous sheet 21a and the skin side continuous sheet 22a. Incidentally, the thickness direction of the non-skin side continuous sheet 21a and the skin side continuous sheet 22a (in FIG. 7, the direction penetrating the paper surface), the MD direction which is the conveyance direction, and the CD direction which is the width direction are orthogonal to each other. In a relationship.

First, in step S201 of pasting together continuous sheets, the materials of the diaper 1 are transported at a predetermined transport speed along a predetermined transport direction (MD direction) by an appropriate transport mechanism, and each material is placed at a predetermined position. Ru. "Materials for the diaper 1" refers to 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 (conveyance 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 are arranged in the left-right direction (conveyance direction). The skin-side continuous sheet 22a is continuous in a connected state, and the elastic members 23', 33' are continuous in a state in which a plurality of elastic members 23, 33 are connected in the left-right direction. Note that 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, the plurality of elastic members 23', 33' are conveyed in an extended state in the conveyance direction, and are placed 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 placed from above the elastic members 23', 33'. An adhesive such as hot melt is applied to each elastic member 23', 33', and the non-skin side continuous sheet 21a, each elastic member 23', 33', and the skin side continuous sheet 22a are adhered to each other. .

Furthermore, in the bonding step S201, the non-skin side continuous sheet 21a and the skin side continuous sheet are aligned so that one end 21an of the non-skin side continuous sheet 21a in the CD direction and one end 22an of the skin side continuous sheet 22a in the CD direction are aligned. A step (S201') of adjusting the position of 22a in the CD direction is provided. In this step, a sensor (not shown) that detects the position of one end 21an of the non-skin side continuous sheet 21a and one end 22an of the skin side continuous sheet 22a is installed only on one end side (one end 21an, one end 22an side) in the CD direction. By providing these, the positions of the one end 21an and the one end 22an are sensed, and the arrangement positions are adjusted so that the positions of the one end sides of the non-skin side and skin side continuous sheets 21a and 22a are aligned in the CD direction. The one ends 21an and 22an are the upper ends of one of the ventral side and dorsal side band members that form the waist portion 2 of the diaper 1 in the product state, and according to the adjusting step S201', the ends that will be the upper ends. This ensures the aesthetics of the upper end.

In the bonding step S201, 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, one end 21an and one end 22an are aligned, so it is substantially zero) is The non-skin side continuous sheet 21a and the skin side continuous sheet are arranged so that 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 is shorter than the distance (S1 in FIG. 7). The sheet 22a is arranged and pasted together.

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

In the next folding step S203, one end 21an of the non-skin side continuous sheet 21a in the CD direction is not folded back, and the other end 21as of the non-skin side continuous sheet 21a in the CD direction is turned to the skin side side (that is, the end 21as of the non-skin side continuous sheet 21a in the CD direction). Fold it back so that it overlaps the area on which the adhesive 45 has been applied. Note that the elastic member 23' is not disposed in the band-shaped folded portion 21fa that is continuous in the conveyance direction and is the folded portion 21f of the first sheet 21 described above during the bonding step S201. Since the elastic member 23' is not present in the band-shaped folded part 21fa, the band-shaped folded part 21fa is folded back toward the skin-side continuous sheet 22a without shrinking, and the ends formed by the folding are prevented from shrinking and aesthetics are maintained. can.

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

Next, in step S205 of joining the absorbent main body 10, the front upper end 10ea of the absorbent main body 10 and the ventral side strip-shaped continuous sheet 20a are joined with an adhesive (the adhesive 50 in FIG. 6), and similarly, the absorbent main body 10 The rear upper end portion 10eb of the main body 10 and the back side strip-shaped continuous sheet 30a are bonded using an adhesive. In addition, in the joining step S205, the absorbent body 10 is joined so that the absorbent main body 10 partially covers the cut ends 20ah and 30ah of the ventral side band-like continuous sheet 20a and the back side band-like continuous sheet 30a. By joining the absorbent main body 10 and the ventral strip-shaped continuous sheet 20a (dorsal strip-shaped continuous sheet 30a), the cut ends 20ah, 30ah can be directly connected to the lower end of the waist portion 2 (i.e., the leg opening At the lower end, each sheet (first sheet 21 and second sheet 22, third sheet 31 and fourth sheet 32) of each ventral side and dorsal side band member 20, 30 Misalignment is less likely to occur. Thereby, aesthetics of the leg opening LH can be achieved. Further, after the above-mentioned cutting, there is no step of changing the orientation so that the cut ends 20ah, 30ah are at the upper end of the waist 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 that can achieve both aesthetics of the waist opening BH and cost reduction.

<Method for manufacturing diaper 1 according to 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 diagram showing the manufacturing flow of the diaper 1 according to the second embodiment. Steps S202 to S205 of the second embodiment are basically the same as steps S202 to S205 of the first embodiment. In order to form the through holes 40 (openings 40) in the second embodiment, steps (S210, S211) of forming holes are added in the bonding step S201, and the non-skin side continuous sheet 21a in the same step is added. The arrangement and conveyance method of the skin-side continuous sheet 22a are also different.

As shown in FIG. 8, the lamination step S201 in the manufacturing method of the diaper 1 of the second embodiment includes an upstream roll 51, an intermediate roll 52, a downstream roll 53, and a pair of conveyor rolls 54.

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

First, the non-skin side continuous sheet 21a is wound around the upstream roll 51 and transported by the rotation of the upstream roll 51. When the non-skin side continuous sheet 21a approaches the intermediate roll 52, multiple 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. Thus, multiple non-skin side apertures 40 are formed in the non-skin side continuous sheet 21a (S210). The non-skin side continuous sheet 21a is then transferred from the upstream roll 51 to the intermediate roll 52, and transported by the rotation of the intermediate roll 52 with the pins 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, continuous elastic members 23', 33' coated with adhesive and in an elongated state are introduced toward a position where the intermediate roll 52 and the downstream roll 53 approach each other. Note that the elastic members 23', 33' are passed between the pins 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 are sandwiched between the outer peripheral surface of the intermediate roll 52 (surface other than the pin 55) and the outer peripheral surface of the downstream roll 53 (surface other than the recess 56), with the elastic members 23', 33' interposed between them. The skin side continuous sheet 22a and the non-skin side continuous sheet 21a are then bonded together by the adhesive applied to the elastic members 23', 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. In this way, a plurality of skin-side openings 40 (through-holes 40) are formed in the skin-side continuous sheet 22a.

Thereafter, as the intermediate roll 52 rotates, the pin 55 is pulled out from the skin-side continuous sheet 22a toward the non-skin-side continuous sheet 21a. In this way, the non-skin side continuous sheet 21a and the skin side continuous sheet 22a having the through holes 40 (openings 40) are formed. The non-skin side continuous sheet 21a and the skin side continuous sheet 22a are conveyed to the downstream process S202 by a pair of conveyance rollers 54.

According to the steps S210 and S211 of forming the openings, 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 step S202 of applying an adhesive in the method for manufacturing the diaper 1 of the second embodiment, the skin side opening of the skin side surface (upper side surface in the thickness direction) of the skin side continuous sheet 22a is performed. Adhesive 45 is applied to areas where holes 40 are not present. Then, in the folding step S203, the non-skin side continuous sheet 21a overlaps the area where 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). Fold back the other end 21as of the non-skin side continuous sheet 21a 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 a diaper 1 that reduces discomfort to the wearer due to seepage.

===Other embodiments===
Although the embodiment of the present invention has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

In the second embodiment described above, a 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 multiple openings 40 may be provided in at least one of the first sheet 21 and the third sheet 31 provided on the non-skin side, or the second sheet 22 and the fourth sheet 32 provided on the skin side. The presence of multiple openings 40 improves breathability, and when such openings 40 are provided on the skin side, they facilitate the transfer of moisture such as sweat to the non-skin side, and when provided on the non-skin side, they facilitate the evaporation of moisture such as sweat.

In the second embodiment described above, the shape of the opening 40 was circular, but it is not limited to the circular shape shown in the figure and may be an ellipse or any other shape.

1 diaper (absorbent article), 2 waist portion, 10 absorbent main body,
10a overlapping area, 10ah non-skin side, 10ea front upper end,
10eb rear 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, 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 end,
31 3rd sheet, 31en upper end position,
32 4th sheet, 32en upper end position,
33 elastic member, 33' elastic member, 33a elastic member (first elastic member),
33b elastic member (second elastic member), 33n elastic member,
40 Opening (through hole, non-skin side opening, skin side opening), 45 Adhesive, 50 Adhesive,
51 upstream roll, 52 intermediate roll, 53 downstream roll, 54 conveyance roller,
55 pin, 56 recess,
BH Waist opening, C10 Center position (predetermined position),
L1 distance, L2 distance, LH leg opening, S1 distance

Claims (14)

The vertical direction, the horizontal direction, and the front-rear direction intersect with each other,
An absorbent body that absorbs liquid;
An abdominal belt member provided along the left-right direction and joined to a front upper end portion of the absorbent main body;
a back-side belt member provided along the left-right direction and joined to a rear upper end portion of the absorbent main body,
One of the abdominal belt member and the dorsal belt member has a first sheet and a second sheet separate from the first sheet,
The other of the abdominal belt member and the dorsal belt member has a third sheet and a fourth sheet separate from the third sheet,
The first sheet, the second sheet, the third sheet, and the fourth sheet are joined at both ends in the left-right direction of the abdominal-side belt member and the back-side belt member,
In a stretched state in which the abdominal belt member and the dorsal belt member are stretched,
the first sheet has a non-skin side portion disposed on the non-skin side of the second sheet, and a folded-back portion folded back to the skin side at an upper end of the one of the members,
the third sheet is disposed closer to the skin than the fourth sheet and is not folded back;
In the one belt member, an upper end of the second sheet is located below an uppermost elastic member among the plurality of elastic members,
An absorbent article characterized in that the uppermost elastic member is provided between the non-skin side portion of the first sheet and the folded-back portion, and the uppermost elastic member is joined to the skin side of the non-skin side portion of the first sheet and the non-skin side of the folded-back portion with an adhesive. The absorbent article according to claim 1,
The absorbent article, wherein the upper end position of the third sheet and the upper end position of the fourth sheet are shifted in the vertical direction. The absorbent article according to claim 1 or 2,
An absorbent article, characterized in that one of the belt members further has another sheet provided so as to overlap the folded-back 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 greater than or equal to the average basis weight of the second sheet,
An absorbent article characterized in that the average basis weight of the third sheet is greater than or equal to 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 holes are provided in at least one of the first sheet and the third sheet, or the second sheet and the fourth sheet. It has a vertical direction, a horizontal direction, and a front-back direction that intersect with each other,
an absorbent body that absorbs liquid;
a ventral band member provided along the left-right direction and joined to the front upper end of the absorbent main body;
a backside band member provided along the left-right direction and joined to the rear upper end of the absorbent main body;
One of the ventral band members and the dorsal band member has a first sheet and a second sheet,
The other 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 an absorbent article joined at both ends of the ventral band member and the dorsal band member in the left-right direction,
In an extended state in which the ventral band member and the dorsal band member are extended,
The first sheet has a non-skin side portion disposed 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 arranged on a non-skin side than the fourth sheet and is not folded back,
The one band member has a plurality of through holes provided to penetrate the non-skin side portion of the first sheet and the second sheet,
The folded portion is a through-hole non-existence region where the plurality of through-holes do not exist,
The folded portion overlaps the plurality of through holes when viewed in the front-rear direction,
Between the first sheet and the second sheet, a plurality of elastic members that expand and contract in the left-right direction are arranged in the vertical direction and joined by an adhesive;
An absorbent article characterized by: The absorbent article according to claim 6,
The absorbent main body has an overlapping region that overlaps at least a portion of the plurality of through holes when viewed in the front-back 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 with an adhesive. The absorbent article according to any one of claims 1 to 7,
Between the first sheet and the second sheet, a plurality of elastic members that expand and contract in the left-right direction are joined with an adhesive in a state that they are lined up in the vertical direction,
Between the third sheet and the fourth sheet, a plurality of elastic members that expand and contract in the left-right direction are joined with an adhesive in a state that they are lined up in the vertical direction,
In each of the ventral band member and the dorsal band member, the average basis weight of the adhesive applied to the lowermost elastic member is the average basis weight of the adhesive applied to the uppermost elastic member. An absorbent article characterized in that it is higher than. 9. The absorbent article according to claim 8,
In the other belt member, the uppermost elastic member among the plurality of elastic members is defined as a first elastic member, and the elastic member below the first elastic member is defined as a second elastic member.
An absorbent article, characterized in that the distance from the upper end of the other belt 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. The absorbent article according to any one of claims 1 to 9,
An absorbent article, characterized in that, in the front-to-rear direction, the folded-back portion is located closer to the skin than the second sheet. an absorbent body that absorbs liquid and has a vertical direction, a left-right direction, and a front-back direction that intersect with each other; and a ventral band member that is provided along the left-right direction and joined to the front upper end of the absorbent body. , a method for manufacturing an absorbent article having 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 of the absorbent main body,
A non-skin side continuous sheet that is continuous in the conveyance direction and is a non-skin side sheet of the ventral side band member and the dorsal side band member, and a non-skin side continuous sheet that is the skin side sheet of the ventral side band member and the dorsal side band member, and that is continuous in the conveyance direction. A skin-side continuous sheet that is continuous in the transport direction and whose intersecting length in the CD direction is shorter than the length of the non-skin-side continuous sheet in the CD direction is connected to one end of the non-skin-side continuous sheet in the CD direction and the skin-side continuous sheet in the CD direction. The non-skin side continuous sheet is arranged such 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. a step of laminating the skin-side continuous sheet;
a step of folding back the other end of the non-skin side continuous sheet in the CD direction to the skin side of the absorbent article without folding back the one end of the non-skin side continuous sheet in the CD direction;
The bonded non-skin side continuous sheet and the skin side continuous sheet are cut together at the center of the CD direction of the non-skin side continuous sheet and the skin side continuous sheet, and the ventral band-like continuous sheet and the dorsal side continuous sheet are cut. forming a continuous band-like sheet;
joining the front upper end of the absorbent main body and the ventral belt-like continuous sheet, and joining the rear upper end of the absorbent main body and the dorsal belt-like continuous sheet,
In the pasting step,
forming a non-skin side opening in the non-skin side continuous sheet by passing a pin through the non-skin side continuous sheet;
forming a skin-side opening in the skin-side continuous sheet by causing the pin that has penetrated the non-skin-side continuous sheet to penetrate the skin-side continuous sheet,
In the folding step, the other end of the non-skin side continuous sheet is folded back so that the non-skin side continuous sheet covers the skin side openings from the skin side. A method for manufacturing an absorbent article according to claim 11, comprising:
The CD direction of the non-skin side continuous sheet or the 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. 1. A method for manufacturing an absorbent article, comprising the step of adjusting position. A method for manufacturing an absorbent article according to claim 11 or 12, comprising:
In the step of joining, the absorbent article is manufactured such that the absorptive main body covers a part of the cut side ends of the ventral side strip-like continuous sheet and the dorsal side strip-like continuous sheet. Method. A method for manufacturing an absorbent article according to claim 13, comprising the steps of:
a step of applying an adhesive to an area of the skin side continuous sheet where no skin side apertures are present, before the step of folding back;
The method for manufacturing an absorbent article, wherein in the folding back step, the other end of the non-skin side continuous sheet is folded back so that the non-skin side continuous sheet overlaps the area where the adhesive is applied.

Images