WO2019116982A1 - Disposable diaper and method for manufacturing disposable diaper - Google Patents

Abstract

This disposable diaper (10) is provided with: a belly-side exterior body (12F); a back-side exterior body (12R); and an absorbent body (16) comprising end regions (16A) in which both end sections in the front-back direction overlap with the belly-side exterior body (12F) and the back-side exterior body (12R), and constituting a crotch part 10C between the belly-side exterior body (12F) and the back-side exterior body (12R). At least one among the belly-side exterior body (12F) and the back-side exterior body (12R), is provided with: inner elastic parts (27F, 27R) positioned further inside than the absorbent body (16); a sheet part that is provided with any one or both of an outer sheet part (26) and an inner sheet part (29) which are located further outside than the absorbent body (16) and face at least the inner elastic parts (27F, 27R); and partial adhesion parts (25X) which at both sides of the end regions (16A) in the body circumferential direction partially attach the sheet part and the inner elastic parts (27F, 27R).

Description

Disposable diaper and method of manufacturing disposable diaper

The present invention relates to a disposable diaper and a method of manufacturing the disposable diaper.

The disposable diaper of patent document 1 is provided with the inner side elastic part located inside an absorptive main body, and between an absorptive main body and an inner side elastic part is non-adhesive. Then, on both sides of the absorbent main body in the waist direction, the outer sheet portion and the inner elastic portion located opposite to each other are entirely bonded by the hot melt adhesive.

Patent 6229787

In the disposable diaper, the outer sheet portion, the inner elastic portion and the like are formed by stacking a plurality of sheet elements, and the sheet elements are adhered to each other by a hot melt adhesive. For this reason, reduction of the usage-amount of a hot melt adhesive is calculated | required. In addition, the hot melt adhesive causes air permeability in and out of the diaper to be impaired, and improvement in air permeability in and out of the diaper is required.

An object of the present invention is to provide a disposable diaper and a method of manufacturing the disposable diaper which can reduce the adhesive usage and improve the air permeability inside and outside the diaper.

A disposable diaper for solving the above problems includes a first exterior body constituting a front body, a second exterior body constituting a back body, and the first exterior body and the second exterior body at both end portions in the front-rear direction. And an absorbent main body that constitutes a crotch region between the first exterior body and the second exterior body. The at least one exterior body of the first exterior body and the second exterior body includes an elastic member that extends in the circumferential direction of the waist and expands and contracts, and is an inner elastic portion configured by sandwiching the elastic member with a sheet, The inner elastic portion located on the inner side closer to the wearer's skin than the absorbent main body, and the outer side opposite to the skin from the absorbent main body, at least opposite to the inner elastic portion And an outer sheet portion, and a sheet provided with at least one of the inner sheet portion positioned opposite to the inner elastic portion at a position between the outer sheet portion and the absorbent main body. And a partially bonded portion for partially bonding the sheet portion and the inner elastic portion on both sides of the end region in the waist circumference direction.

According to the above-mentioned configuration, since the partial bonding portions are partially bonded on both sides of the end region, the bonding area can be reduced and the amount of adhesive used can be reduced as compared to the case of the full bonding. In addition, the air permeability inside and outside the diaper can be improved.

In the above-described disposable diaper, the partial bonding portions may have bonding portions at regular intervals.
In the above-mentioned disposable diaper, the inner elastic portion is not adhered to the end region, and the disposable diaper has the sheet portion and the inner elastic portion in the peripheral portion adjacent to the end region, The continuous bonding portion may be continuous, and the continuous bonding portion bonding so that the open end in the end region faces the crotch portion, and the partial bonding portion may be provided outside the continuous bonding portion.

According to the above configuration, by providing the continuous bonding portion, it is possible to configure a pocket for containing excrement in the end region. And since the continuous adhesion part is provided, the leak from the waist opening of the excretion accommodated in the pocket can be suppressed.

In the disposable diaper, the partially bonded portion may be configured by a bonded portion and a non-bonded portion which extend in the front-rear direction and are alternately arranged in the waist direction.
According to the above configuration, by providing the bonding portion and the non-bonding portion so as to constitute a stripe pattern, the bonding area can be reduced as compared to the case of full bonding, and the amount of adhesive used can be reduced. The air permeability inside and outside the diaper can be improved.

In the above disposable diaper, the partial bonding portion may be configured by a plurality of bonding portions having a dot shape and a non-bonding portion other than the bonding portion.
According to the above configuration, by forming the dot shape of the bonding portion, the bonding area can be reduced as compared to the case of bonding on the entire surface, the amount of adhesive used can be reduced, and the air permeability inside and outside the diaper is improved. can do. In this case, the plurality of bonding portions having a dot shape can be configured by heat fusion or a hot melt adhesive.

In the disposable diaper, the non-adhesive portion includes a region extending in the circumferential direction of the waist and coinciding with the extension position of the elastic member, and the partial adhesive portion is the outer sheet portion and the adhesive portion in the adhesive portion. One or both of the inner sheet portions and the inner elastic portion may be adhered by heat fusion.

According to the above configuration, the partially bonded portion can be provided by heat welding. And since an elastic member extends to a non-adhesion part, it can also prevent that an elastic member is cut by heat welding.

In the disposable diaper, in the partially bonded portion, any one of the outer sheet portion and the inner sheet portion may be bonded to the inner elastic portion by a hot melt adhesive.

According to the above configuration, it is possible to bond one of the outer sheet portion and the inner sheet portion to the inner elastic portion by the hot melt adhesive.
In the disposable diaper, at least one of the first exterior body and the second exterior body includes an upper region and a lower region located on the crotch side of the upper region, and the upper region is An outer elastic portion including the inner elastic portion, the lower region including a lower elastic member extending in the circumferential direction and extending and contracting, the lower elastic member being sandwiched between sheets, the absorbent main body You may make it provide the said outer side elastic part located more outside.

According to the above configuration, by providing the outer elastic portion, it is possible to suppress the area in front of the excrement flowing to the upper area to the skin side, and to easily absorb the excrement in the absorbent main body.
In the disposable diaper, in the partially bonded portion, the sheet portion and the inner elastic portion are formed by joining both ends of the first exterior body and the second exterior body in the circumferential direction. A communication passage may be provided to connect the upper end portion of the waist opening and the lower end portion of the inner elastic portion opposite to the upper end portion.

According to the above configuration, the communication passage can be provided in the non-adhesive portion by the contraction of the elastic member, and the air permeability inside and outside the diaper can be further improved.
The manufacturing method of the disposable diaper for solving the said subject is the 1st exterior body which comprises a front body, the 2nd exterior body which comprises a back body, the said 1st exterior body and the said 1st exterior body in the both ends in the front-back direction. 2. A manufacturing method of a disposable diaper comprising an end region overlapping with an exterior body, and an absorbent main body forming a crotch portion between the first exterior body and the second exterior body, the disposable diaper comprising The at least one outer package of the first outer package and the second outer package includes an elastic member that extends in the circumferential direction of the waist and expands and contracts, and is an inner elastic portion configured by sandwiching the elastic member with a sheet, The inner elastic portion located on the inner side closer to the wearer's skin than the absorbent main body, and the outer side opposite to the skin from the absorbent main body, facing at least the inner elastic portion; The external seat section located, And a sheet portion provided with at least one or both of inner sheet portions positioned opposite to the inner elastic portion at a position between the position of the outer sheet portion and the absorbent main body. The manufacturing method includes a partial bonding step of partially bonding the sheet portion and the inner elastic portion on both sides of the end region in the waist direction.

In the manufacturing method of the said disposable diaper, you may make it provide an adhesion part by a fixed space | interval in the said partial adhesion process.
In the manufacturing method of the said disposable diaper, in the peripheral part adjacent to the said end area | region, the said sheet | seat part and the said inner side elastic part are continuous, and the opening end in the said end part area | region faces the crotch. It may further include a continuous bonding step of bonding.

In the manufacturing method of the disposable diaper, in the partial bonding step, the sheet portion and the inner elastic portion are extended so as to extend in the front-rear direction and to alternately align the bonded portion and the non-bonded portion in the waist direction. It may be adhered.

In the manufacturing method of the disposable diaper, in the partial bonding step, the sheet portion and the inner elastic portion are bonded so that a plurality of bonded portions having a dot shape and a non-bonded portion other than the bonded portion are provided. May be

In the manufacturing method of the disposable diaper, any of the outer sheet portion and the inner sheet portion may be provided such that a plurality of bonding portions having a dot shape and a non-bonding portion other than the bonding portion are provided in the partial bonding step. One or both of them and the inner elastic portion may be bonded by heat fusion, and the non-bonded portion may extend in the circumferential direction of the body and be aligned with the extending position of the elastic member.

In the method for manufacturing a disposable diaper, in the partial bonding step, any one of the outer sheet portion and the inner sheet portion may be bonded to the inner elastic portion by a hot melt adhesive.

In the method of manufacturing the disposable diaper, at least one of the first exterior body and the second exterior body includes an upper region, and a lower region located on the crotch side of the upper region, The upper region includes the inner elastic portion, and the lower region includes a lower elastic member extending in the circumferential direction and extending and contracting, and the lower elastic member is an outer elastic portion configured by sandwiching the lower elastic member with a sheet. An outer elastic portion positioned outside the absorbent main body, wherein the manufacturing method includes the step of sandwiching the lower elastic member with a sheet in the lower region to form the outer elastic portion; The method may further include the step of arranging and bonding the end region across the elastic portion and the sheet portion.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the underpants-type disposable diaper in 1st Embodiment. (A) is a top view which shows the unfolded state of the pants type disposable diaper of FIG. 1, Comprising: The figure seen from the skin surface side which touches skin, (b) was along 2B-2B line of (a) Cross section. (A) is a top view which shows the adhesion field of the upper field of the underpants type disposable diaper of Drawing 1 corresponding to Drawing 2 (a), (b) is the adhesion field of the lower field of underpants type disposable diaper of FIG. The top view corresponding to FIG. 2 (a). (A)-(f) is a figure which shows the manufacturing process of the underpants-type disposable diaper of FIG. 1, (a) is a figure which shows the state which has arrange | positioned the upper elastic member and the lower elastic member with respect to the external sheet part. (B) shows a state in which one inner sheet portion is stacked on the upper elastic member and the lower elastic member, (c) shows an area for bonding the end region of the absorbent main body and the inner elastic portion (D) shows a state in which the adhesive body is applied, (d) shows a state in which the absorbent main body is placed, (e) shows a state in which the inner elastic portion is folded back, (f) The figure which shows the state which arrange | positioned the inner side elastic part. The top view which shows the unfolded state of the underpants-type disposable diaper in 2nd Embodiment. (A)-(f) is a figure which shows the manufacturing process of the underpants type disposable diaper of FIG. 5, (a) is a figure which shows the state which has arrange | positioned the upper elastic member and the lower elastic member with respect to the external sheet part. (B) shows a state in which one inner sheet portion is stacked on the upper elastic member and the lower elastic member, (c) shows an adhesive in a region to which the end region of the absorbent main body is adhered The figure which shows the state which apply | coated, (d) shows the state which mounted the absorptive main body, (e) shows the state which apply | coats an adhesive agent to the outer side of an edge part area, and bends an inner side elastic part. The figure (f) is a figure which shows the state which has arrange | positioned the inner side elastic part. The top view which shows the unfolded state of the underpants-type disposable diaper in 3rd Embodiment. (A)-(f) is a figure which shows the manufacturing process of the underpants type disposable diaper of FIG. 7, (a) is a figure which shows the state which has arrange | positioned the upper elastic member and the lower elastic member with respect to the external sheet part. , (B) shows a state in which one inner sheet portion is stacked on the upper elastic member and the lower elastic member, (c) is an adhesive applied to the area for bonding the end area of the absorbent main body (D) shows a state in which the absorbent main body is placed, and (e) shows a state in which a continuous adhesive portion is provided outside the end region and the inner elastic portion is folded back. (F) is a figure which shows the state which integrates an upper area | region by welding. Sectional drawing of the underpants-type disposable diaper in 4th Embodiment. (A)-(f) is a figure which shows the manufacturing process of the underpants type disposable diaper of FIG. 9, (a) is a figure which shows the state which has arrange | positioned the lower elastic member in the outer sheet part, (b) (C) shows a state in which the adhesive is applied to the area to which the end area of the absorbent main body is adhered, (d) shows the absorbent main body. The figure which shows the state which has arrange | positioned the upper elastic member to the sheet | seat which mounts and comprises an inner elastic part, (e) pinches an upper elastic member by a sheet, comprises an inner elastic part, and also the outer side of an edge area. The figure which shows the state which provides a continuous adhesion part and mounts an inner side elastic part, (f) is a figure which shows the state which integrates an upper area | region by welding. It is a top view which shows the unfolded state of the underpants type disposable diaper in 5th Embodiment, Comprising: The figure seen from the skin surface side which touches skin. Sectional drawing of the underpants-type disposable diaper in 6th Embodiment. It is a top view which shows the unfolded state of the underpants type disposable diaper in 7th Embodiment, Comprising: The figure seen from the skin surface side which touches skin. Sectional drawing of the underpants-type disposable diaper in 8th Embodiment.

The underpants-type disposable diaper in 1st-8th embodiment which materialized the absorbent article in this invention with reference to FIGS. 1-14 is demonstrated.
First Embodiment
As shown in FIG. 1, a pants-type disposable diaper 10 (hereinafter simply referred to as "diaper 10") has a front body 10F having a shape that follows the abdominal shape of the human body and a shape that follows the back shape of the human body It comprises a back body 10R and a crotch 10C connecting a front body 10F and a back body 10R.

A side opposite to the crotch 10C in the front body 10F constitutes a waist portion 10W surrounding a portion around the waist of the human body, and the upper end is provided with a waist opening 10A. Further, the left and right end portions of the front body 10F, the left and right end portions of the back body 10R, and the lower sides of the left and right end portions of the crotch 10C have a pair of left and right leg openings having a shape surrounding a thigh portion of a human body. It constitutes 10L. Further, left and right end portions of the front body 10F and the back body 10R in the waist-surrounding direction are joint portions 11.

Fig.2 (a) is a top view which shows the unfolded state of a pants type disposable diaper, Comprising: The figure seen from the skin surface side which touches skin, FIG.2 (b) is a 2B-2B line of FIG.2 (a). It is sectional drawing along. In addition, in FIG.2 (b), the right side turns into a diaper wearer's skin side.

The torso portion 10W in the front body 10F is constituted by a ventral side exterior body 12F, and the torso portion 10W in the back body 10R is constituted by a back side exterior body 12R.
The ventral-side exterior body 12F and the back-side exterior body 12R have a rectangular shape whose longitudinal direction is the waist direction. The sheet constituting the exterior body is, for example, a non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins as a raw material, and even a liquid-permeable sheet or a liquid-impervious sheet Good. The ventral-side exterior body 12F is configured such that the ventral-side upper elastic member 15FU and the ventral-side lower elastic member 15FD are sandwiched between the sheets constituting the ventral-side exterior body 12F. The back side exterior body 12R is also configured by sandwiching the back side upper elastic member 15RU and the back side lower elastic member 15RD between the sheets constituting the back side exterior body 12R. These elastic members 15FU, 15FD, 15RU, 15RD are elastic bodies formed of one or more materials selected from natural rubber, synthetic rubber, urethane and the like, and are formed in a thread or string shape. A plurality of elastic members 15FU, 15FD, 15RU, 15RD are arranged parallel to one another along the direction around the waist.

The ventral-side exterior body 12F and the back-side exterior body 12R are connected by the absorptive main body 16 which comprises the crotch 10C. The absorbent main body 16 has a rectangular shape whose longitudinal direction is the longitudinal direction. As shown in FIG. 2 (b), the absorbent main body 16 has a liquid-impermeable back sheet 17, an absorbent body 18, a liquid-permeable top sheet 19, and the back sheet 17. And an outer cover sheet 20. In the diaper 10, the top sheet 19 is disposed on the inner side in contact with the wearer's skin, the back sheet 17 is disposed on the outer side with respect to the absorbent body 18, and the cover sheet 20 covers the back sheet 17. Be placed outside. Then, in the absorbent main body 16, the cover sheet 20, the back sheet 17, the absorber 18, and the top sheet 19 are overlapped in this order from the outside.

The material forming the back sheet 17 is, for example, a film made of a liquid-impervious polyethylene resin. The back sheet 17 is formed with a large number of fine holes in order to secure air permeability. The material forming the top sheet 19 and the cover sheet 20 is, for example, one or more materials selected from woven fabric, non-woven fabric, porous film and the like. In addition, the top sheet 19 is, for example, a fiber of thermoplastic resin such as polypropylene, polyethylene, polyester, nylon, etc., and a non-woven fabric having liquid permeability composed of fibers subjected to a hydrophilization treatment is used. . Since the cover sheet 20 is the outermost sheet and is a sheet that touches the user, the cover sheet 20 is made of a non-woven fabric or the like that improves the touch.

The absorber 18 has an elongated band shape so as to straddle the front body 10F, the crotch 10C, and the back body 10R. The absorbent body 18 is composed of a compact of absorbent material and a core wrap for wrapping the compact. The molded article of the absorbent material forming the absorbent body 18 is, for example, a molded absorbent material such as fluff pulp, super absorbent polymer, hydrophilic sheet and the like. Also, the core wrap is made of tissue or non-woven fabric. Then, the absorber 18 is disposed and joined between the back sheet 17 and the top sheet 19. The absorber 18 is extended between the ventral exterior body 12F and the dorsal exterior body 12R, and includes a ventral end 18F and a dorsal end 18R. In the absorber 18, the core wrap may be omitted.

The back sheet 17, the top sheet 19, and the cover sheet 20 are sheets having a rectangular shape that is slightly larger than the absorber 18, the absorber 18 is disposed in the central region, and the periphery of the absorber 18 is There is no absorber 18 present. The side edges in the front-rear direction of the absorbent main body 16 are the sheet side edges 18A in which the absorber 18 is not present. The sheet side edge portion 18A is configured, for example, by overlapping the back sheet 17, the top sheet 19, and the cover sheet 20. Further, as an example, the sheet side edge portion 18A is configured by folding back both side edge portions extending in the front-rear direction of the cover sheet 20 inward. Further, the inner surface and the outer surface of the region overlapping the outer coverings 12F and 12R in the front-rear direction of the absorbent main body 16 become an end region 16A to which the sheet constituting the outer covering is adhered. The end regions 16A are both end portions of the absorbent main body 16 in the front-rear direction, and a ventral end 18F and a back end 18R of the absorber 18, a peripheral portion 18B of the ends 18F and 18R, and a sheet And a side edge portion 18A.

The ventral exterior body 12F includes a ventral upper region 12FU and a ventral lower region 12FD. The dorsal exterior body 12R also includes a dorsal upper region 12RU and a dorsal lower region 12RD.
As shown in FIG. 2B, in the ventral upper region 12FU and the dorsal upper region 12RU, the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are inside of the absorbent main body 16, that is, the top sheet 19 It is disposed on the side, and constitutes a part of the waist opening 10A and the waist portion 10W. In the ventral lower region 12FD and the dorsal lower region 12RD, the ventral lower elastic member 15FD and the dorsal lower elastic member 15RD are disposed outside the absorbent main body 16, that is, on the back sheet 17 or the cover sheet 20 side. , And a part of the waist portion 10W.

In the ventral-side upper region 12FU, a plurality of ventral-side upper elastic members 15FU are in the longitudinal direction of the waist, between the sheets in the longitudinal direction (between the belly-side outer sheet portion 26F and the belly-side inner sheet portion 29F) It is arrange | positioned in the state extended over the left and right both ends. In the back upper region 12RU, a plurality of back upper elastic members 15RU extend between the sheets whose longitudinal direction is the waist direction (between the back outer sheet portion 26R and the back inner sheet portion 29R). It is arrange | positioned in the extended state over both the left and right ends in the direction.

In the ventral lower region 12FD, a plurality of ventral lower elastic members 15FD extend between the sheets whose longitudinal direction is the waist direction (between the ventral outer sheet portion 26F and the ventral inner sheet portion 29F). It is disposed across the left and right ends in the circumferential direction. In the lower back region 12RD, a plurality of back lower elastic members 15RD are in the longitudinal direction between the back of the body (between the back outer sheet portion 26R and the back inner sheet portion 29R). It is disposed across the left and right ends in the direction. The elastic members 15FU, 15FD, 15RU, and 15RD constitute waist gathers and tummy gathers in the waist portion 10W, and suppress the occurrence of belly leakage and back leakage.

As shown in FIG. 2 (b), the ventral lower region 12FD and the dorsal lower region 12RD are directly adhered to the cover sheet 20 of the end region 16A of the absorbent main body 16. As shown in FIG. 2A, the ventral lower elastic member 15FD is arranged in an unextended state, for example, in a cut state, on the end region 16A. Further, most of the lower back elastic members 15RD are arranged in the non-extended state, for example, in the cut state, on the end region 16A. Thereby, the absorbent main body 16 is restrained from shrinking and forming a fold in the absorbent main body 16 in accordance with the contraction of the ventral lower elastic member 15FD and the back lower elastic member 15RD. Can. And it can control that a crevice arises between absorptive main part 16 and skin, and belly leak and a back leak can be controlled.

The plurality of back lower elastic members 15RD1 located along the lower end of the back upper region 12RU near the back upper region 12RU among the plurality of back lower elastic members 15RD are the back side of the absorber 18 The end 18R is disposed in an extended state, that is, in an uncut state. Therefore, in the region in which the back lower elastic member 15RD1 is disposed, a fold 16B is formed in the back end 18R. At the back end 18R where the folds 16B are formed, the thickness of the absorber 18 is thicker than the area where the folds 16B are not formed, and the end area 16A of the absorbent main body 16 and the ventral inner sheet portion 29F and the back It can function as a guide part to which excrement such as urine is guided between the side inner sheet parts 29R.

As shown in FIG. 2B, the ventral-side upper region 12FU comprises a ventral-side inner elastic portion 27F by sandwiching the ventral-side upper elastic member 15FU with a sheet (a belly-side outer sheet portion 26F and a belly-side inner sheet portion 29F). doing. Also, the ventral lower region 12FD also constitutes a ventral outer elastic portion 28F in which the ventral lower elastic member 15FD is sandwiched by the sheets (a ventral outer sheet portion 26F and a ventral inner sheet portion 29F). The ventral upper region 12FU and the ventral lower region 12FD are connected in series by a ventral outer sheet portion 26F and a ventral inner sheet portion 29F.

The back upper portion 12RU constitutes the back inner elastic portion 27R by sandwiching the back upper elastic member 15RU with the sheets (the back outer sheet portion 26R and the back inner sheet portion 29R). Further, in the back lower region 12RD, the back lower elastic member 15RD is sandwiched between the sheets (the back outer sheet portion 26R and the back inner sheet portion 29R) to form the back outer elastic portion 28R. The back upper region 12RU and the back lower region 12RD are connected in series by the back outer sheet portion 26R and the back inner sheet portion 29R.

The ventral outer sheet portion 26F and the dorsal outer sheet portion 26R are located on the outermost side opposite to the skin, and are the sheets that are bent inward at the portion of the waist opening 10A and located on the most skin side. . The ventral inner sheet portion 29F and the dorsal inner sheet portion 29R are sheets respectively facing the ventral outer sheet portion 26F and the dorsal outer sheet portion 26R. Specifically, the inner sheet portions 29F and 29R are located between the outer sheet portions 26F and 26R and the absorbent main body 16 on the outer side opposite to the skin from the absorbent main body 16 and have the waist opening 10A. It is bent inward at a portion and located between the absorbent main body 16 and the outer sheet portions 26F, 26R inside the absorbent main body 16.

The ventral outer sheet portion 26F and the ventral inner sheet portion 29F that constitute the ventral inner elastic portion 27F and the ventral outer elastic portion 28F sandwich the ventral upper elastic member 15FU and the ventral lower elastic member 15FD, and are hot It is adhered by a first adhesive 24 such as a melt adhesive. The folded-back portions of the belly-side outer sheet portion 26F and the belly-side inner sheet portion 29F constitute the waist opening 10A, and the waist opening 10A is formed of two sheets of sheets to increase the strength ( Refer to left A in FIG. 2 (b)).

The back outer sheet portion 26R and the back inner sheet portion 29R constituting the back inner elastic portion 27R and the back outer elastic portion 28R sandwich the back upper elastic member 15RU and the back lower elastic member 15RD, and are hot. It is adhered by a first adhesive 24 such as a melt adhesive. The folded-back portions of the back outer sheet portion 26R and the back inner sheet portion 29R constitute the waist opening 10A, and the waist opening 10A is formed by stacking two sheets to increase the strength (see FIG. 2 (b) Middle right A section).

In ventral inner elastic portion 27F and dorsal inner elastic portion 27R, ventral inner sheet portion 29F and dorsal inner sheet portion 29R adjacent to ventral upper elastic member 15FU and dorsal upper elastic member 15RU have end regions 16A. It is considered as non-adhesive to the top sheet 19 of In the ventral-side inner elastic portion 27F and the dorsal-side inner elastic portion 27R, in the region around the end region 16A, the belly-side inner sheet portions 29F folded back at the waist opening 10A are hot melt adhesive etc. It is adhered by the second adhesive 25. In addition, the cover sheet 20 in the end region 16A is also adhered to the abdominal inner sheet portion 29F by the second adhesive 25 such as a hot melt adhesive.

Here, FIG. 3 (a) is a plan view showing the bonding area of the upper area corresponding to FIG. 2 (a), and FIG. 3 (b) corresponds to the bonding area of the lower area. It is a top view shown.
As shown in FIGS. 2 (b) and 3 (a), the cover sheet 20 of the end region 16A is adhered to the abdominal inner sheet portion 29F by the second adhesive 25 in the ventral upper region 12FU. The area is the first adhesion area 22A. The first adhesive area 22A on the ventral side is solidly coated with the second adhesive 25. Then, in the first bonding area 22A, the cover sheet 20 of the end area 16A is entirely adhered to the belly-side inner sheet portion 29F by the second adhesive 25. Further, also in the back upper region 12RU, a region where the cover sheet 20 of the end region 16A is bonded to the back inner sheet portion 29R by the second adhesive 25 is the first bonding region 22A. The second adhesive 25 is also solidly coated on the back side first adhesive area 22A, and the cover sheet 20 in the end area 16A is entirely adhered to the back side inner sheet portion 29R by the second adhesive 25.

Further, in the belly-side inner elastic portion 27F in the belly-side upper region 12FU, the belly-side inner sheet portions 29F folded around the first bonding region 22A at the waist opening 10A are attached by the second adhesive 25. The area to be adhered is the second adhesion area 22B. Further, in the back side inner elastic portion 27R in the back side upper region 12RU, a region where the back side inner sheet portions 29R folded back at the waist opening 10A are bonded by the second adhesive 25 is the second bonding region 22B. It becomes. The second adhesion region 22B in the ventral-side inner elastic portion 27F and the back-side inner elastic portion 27R becomes a periphery of the end region 16A, and thus has a concave shape facing the crotch portion 10C. In the inner portion of the concave shape, the ventral inner elastic portion 27F and the dorsal inner elastic portion 27R become a non-adhesive portion to the top sheet 19 in the end region 16A. Thus, a space 30F is provided between the belly-side inner sheet portion 29F of the belly-side inner elastic portion 27F and the top sheet 19 of the end region 16A, and the absorber 18 is present also in the space 30F. Can absorb fluid such as excrement. A space 30R in which the absorber 18 exists is also provided between the back inner sheet portion 29R of the back inner elastic portion 27R and the top sheet 19 of the end region 16A. Also in this space 30R, the absorber The presence of 18 can absorb fluid such as excrement.

In the ventral-side inner elastic portion 27F and the back-side inner elastic portion 27R, the concave-shaped second bonding region 22B is provided with a partial bonding portion 25X. The partially bonded portion 25X includes a bonded portion 22X and a non-bonded portion 22Y in which the second adhesive 25 extends in the front-rear direction and is alternately arranged in the waist direction. The adhesion part 22X and the non-adhesion part 22Y have linear shapes at equal intervals, and form a stripe pattern. Thus, the adhesion area of the partial adhesive portion 25X is reduced by applying the second adhesive 25 only to the adhesive portion 22X, compared with the case where the second adhesive 25 is applied in a solid state, and the second adhesive 25 is used The amount of adhesive 25 used is reduced, and the air permeability inside and outside the diaper is improved. Further, in the non-adhesive portion 22Y, the upper elastic members 15FU and 15RU bend between the inner sheet portions 29F and 29R facing each other to form a communication path 22Z extending in the front-rear direction. The upper end portion of the communication passage 22Z is a waist opening 10A and is closed by the two inner sheet portions 29F and 29R and the outer sheet portions 26F and 26R (A portion), while the lower end of the communication passage 22Z The portion is not bonded between the inner sheet portions 29F and 29R facing each other, and forms an open end 36. When worn, moisture in the interior of the diaper 10 passes through the communication passage 22Z and is exhausted through the two sheet portions 29F, 29R, 26F, 26R of the waist opening 10A, thereby also providing air permeability inside and outside the diaper. I am improving.

The second bonding area 22B includes a margin 34 having a predetermined width between the waist opening 10A and the front end of the end area 16A in the front-rear direction. Also in the margin portion 34, by alternately providing the adhesion portions 22X and the non-adhesion portions 22Y, a short communication passage 22Z extending in the front-rear direction is configured, and the usage amount of the second adhesive 25 is reduced. We are working to improve the air permeability of the 30F, 30R and the outside.

Further, as shown in FIG. 3B, in the ventral lower region 12FD and the dorsal lower region 12RD, a ventral inner sheet portion 29F and a dorsal inner sheet of the ventral outer elastic portion 28F and the dorsal outer elastic portion 28R. An area where the portion 29R is adhered to the cover sheet 20 in the end area 16A is a third adhesion area 22C. The second adhesive 25 is also coated in the third adhesive region 22C. Then, in the third adhesive region 22C, the cover sheet 20 of the end region 16A is entirely adhered to the abdominal inner sheet portion 29F and the back inner sheet portion 29R by the second adhesive 25.

Here, the sizes of the ventral space portion 30F and the back space portion 30R will be described. The ventral side space portion 30F is made to be large and deep with respect to the back side space portion 30R, and when discarding the diaper 10, it becomes possible to accommodate the portion other than the ventral side space portion 30F in a rounded state. ing.

On the inner surface of the absorbent main body 16, that is, on the top sheet 19, solid gathers 21 are disposed at both ends along the front-rear direction. Each three-dimensional gather 21 includes a first elastic member 21E extending in the front-rear direction of the absorbent main body 16, and a side sheet 21S sandwiching the first elastic member 21E. The first elastic members 21E are arranged with respect to the side sheet 21S in a state in which a plurality of the first elastic members 21 are parallel to each other and in which the hot melt adhesive is applied and stretched, and the side sheet 21S is folded in half. It is sandwiched by the side seat 21S. The first elastic member 21E is made of the same material as the elastic members 15FU, 15FD, 15RU, and 15RD. The side sheet 21S is also formed of the same sheet as the top sheet 19 and the cover sheet 20, and is formed of, for example, a long sheet extending in the front-rear direction including a liquid-impervious nonwoven fabric and the like.

The side sheet 21S has a length straddling the ventral upper region 12FU, the crotch 10C, and the dorsal upper region 12RU in the front-rear direction. The first elastic member 21E is shorter than the length of the side sheet 21S in the front-rear direction, and has, for example, a length straddling the ventral lower region 12FD, the crotch 10C, and the dorsal lower region 12RD.

Further, the sheet side edge portion 18A of the absorbent main body 16 is configured by folding back both side edge portions along the front-rear direction of the cover sheet 20 to the center side. The folded sheet side edge 18 </ b> A is provided with the leg gathers 23. The leg gathers 23 are configured by sandwiching a second elastic member 23E extending in the front-rear direction of the absorbent main body 16 at the sheet side edge 18A.

The second elastic member 23E also extends from the ventral lower region 12FD to the dorsal lower region 12RD via the crotch region 10C in a state in which a plurality of the second elastic members 23 are parallel to each other and the hot melt adhesive is applied and stretched. Extended.

Next, a method of manufacturing the diaper 10 will be described. As shown in FIG. 4A, the outer sheet portion 26 is prepared. The outer sheet portion 26 prepared here includes an upper area equivalent portion 31 and a lower area equivalent portion 32. The upper area equivalent portion 31 includes an upper first area 31A and an upper second area 31B.

In the upper first region 31A, the upper elastic member 15U is disposed on the front surface 31A 'in FIG. 4A in a stretched state, and the lower elastic member 15D is stretched in the lower region equivalent portion 32. In FIG. 4 (a). Then, as shown in FIG. 4B, the adhesive 25A is applied to the entire surface of the outer sheet portion 26, and one inner sheet portion 29 covers the upper elastic member 15U and the lower elastic member 15D. Be stacked. Alternatively, the upper elastic member 15U and the lower elastic member 15D to which the adhesive 25A is applied are disposed, and the inner sheet portion 29 is superimposed on the outer sheet portion 26. Thus, the adhesive 25A bonds and integrates the outer sheet portion 26 and the inner sheet portion 29. And the inner side elastic part 27 and the outer side elastic part 28 will be comprised.

As shown in FIG. 4C, in the upper second region 31B of the upper region equivalent portion 31, the first adhesive region 22A and the second adhesive region 22B, and the third adhesive region 22C of the lower region equivalent portion 32. , The second adhesive 25 is applied. Here, the first adhesive area 22A and the third adhesive area 22C are coated with the second adhesive 25. Then, the second adhesive 25 is applied to the second bonding area 22B so that a stripe-shaped partial bonding section 25X is configured by the bonding section 22X and the non-bonding section 22Y (partial bonding process). As shown in FIG. 4D, the end region 16A of the absorbent main body 16 is placed across the first adhesive region 22A of the upper region equivalent portion 31 and the third adhesive region 22C of the lower region equivalent portion 32. Ru.

As shown in FIG. 4E, the inner elastic portion 27 in which the upper elastic member 15U is sandwiched between the sheets is valley-folded and overlapped on the upper second region 31B. As shown in FIG. 4 (f), the inner elastic portion 27 is not bonded to the end region 16A, and a non-bonded space 30 is formed between the end region 16A and the inner elastic portion 27. It will be formed.

In the diaper 10 according to the first embodiment as described above, the following effects can be obtained.
(1-1) In the ventral-side inner elastic portion 27F and the back-side inner elastic portion 27R, the second adhesive region 22B, which is the peripheral portion of the end region 16A, forms a stripe pattern as the second adhesive 25. A hot melt adhesive is applied. Therefore, in the second adhesive region 22B, the adhesive area is reduced and the amount of the second adhesive 25 used can be reduced as compared with the case where the second adhesive 25 is coated with a solid, and the air permeability of the diaper inside and outside Can be improved.

(1-2) In the non-adhesive portion 22Y, the upper elastic members 15FU and 15RU bend between the inner sheet portions 29F and 29R facing each other to form a communication path 22Z extending in the front-rear direction The moisture in the inside of the diaper 10 passes through the communication passage 22Z and is exhausted through the two sheet portions 29F, 29R, 26F, 26R of the waist opening 10A, thereby also improving the air permeability in and out of the diaper. be able to.

(1-3) In the lower regions 12FD and 12RD, the outer elastic portion 28 is disposed outside with respect to the absorbent main body 16, and is directly bonded to the end region 16A of the absorbent main body 16. Therefore, the absorbent main body 16 can be pressed against the wearer's skin to facilitate absorption of excrement even before flowing to the upper regions 12FU and 12RU.

The first embodiment can be implemented with appropriate modifications as follows.
-Also in the 3rd adhesion field 22C of the 2nd adhesion field 22B and a continuation face, the 2nd adhesives 25 may be applied so that it may not be solid and may constitute a stripe pattern. In this case, the stripe pattern is not limited to the case where the bonded portion and the non-bonded portion constituting the stripe pattern extend in the front-rear direction, but may be extended in the circumferential direction.

-In the partially bonded portion 25X, the bonded portion 22X and the non-bonded portion 22Y constituting the stripe pattern may be inclined with respect to the front-rear direction as long as they extend in the front-rear direction. It may have a shape or a wavy shape.

In the partially bonded portion 25X, the bonded portion 22X and the non-bonded portion 22Y constituting the stripe pattern may extend in the circumferential direction.
Second Embodiment
FIG. 5: is a top view which shows the adhesion | attachment area | region of the upper area | region corresponding to Fig.3 (a) in the diaper of 2nd Embodiment. In the diaper according to the second embodiment, a continuous bonding portion 25Y is provided in the periphery adjacent to the end region 16A in the second bonding region 22B in the ventral upper region 12FU and the back upper region 12RU. The continuous bonding portion 25Y has a recess shape such that the open end faces the crotch portion 10C. The continuous adhesive 25Y is coated with a hot melt adhesive as the second adhesive 25. And in the 2nd adhesion field 22B, the partial adhesion part 25X which constituted the stripe pattern with the 2nd adhesives 25 is constituted the outside of continuous adhesion part 25Y.

In the diaper as described above, since the space portions 30F and 30R are surrounded by the continuous bonding portion 25Y in three directions excluding the crotch portion 10C side, they function as pockets for containing excrement. And in partial adhesion part 25X, communicating path 22Z is constituted in non-adhesion part 22Y.

Next, the manufacturing method of the diaper of 2nd Embodiment is demonstrated. As shown in FIG. 6A, the outer sheet portion 26 is prepared. The outer sheet portion 26 prepared here includes an upper area equivalent portion 31 and a lower area equivalent portion 32. The upper area equivalent portion 31 includes an upper first area 31A and an upper second area 31B.

In the upper first region 31A, the upper elastic member 15U is disposed on the front surface 31A 'in FIG. 6A in a stretched state, and the lower elastic member 15D is stretched in the lower region equivalent portion 32. In FIG. 6 (a). Then, as shown in FIG. 6B, the adhesive 25A is applied to the entire surface of the outer sheet portion 26, and one inner sheet portion 29 covers the upper elastic member 15U and the lower elastic member 15D. Be stacked. Alternatively, the upper elastic member 15U and the lower elastic member 15D to which the adhesive 25A is applied are disposed, and the inner sheet portion 29 is superimposed on the outer sheet portion 26. Thus, the adhesive 25A bonds and integrates the outer sheet portion 26 and the inner sheet portion 29. And the inner side elastic part 27 and the outer side elastic part 28 will be comprised.

As shown in FIG. 6C, in the upper second region 31B of the upper region equivalent portion 31, the second adhesive 25 is solid in the first adhesive region 22A and the third adhesive region 22C of the lower region equivalent portion 32. It is painted. As shown in FIG. 6D, the end region 16A of the absorbent main body 16 is placed across the first adhesive region 22A of the upper region equivalent portion 31 and the third adhesive region 22C of the lower region equivalent portion 32. Ru.

As shown in FIG. 6 (e), the hot melt adhesive as the second adhesive 25 is coated solidly on the outer side adjacent to the end region 16A so as to have a concave shape, and the continuous adhesive portion 25Y is configured. Be done (continuous bonding process). The continuous adhesive portion 25Y may be provided when the second adhesive 25 is applied to the first adhesive region 22A and the third adhesive region 22C. Then, the second adhesive 25 is applied to the outside of the continuous bonded portion 25Y in the second bonded region 22B such that a partially bonded portion 25X having a stripe pattern is configured by the bonded portion 22X and the non-bonded portion 22Y (a part Bonding process).

Then, the inner elastic portion 27 in which the upper elastic member 15U is sandwiched between the sheets is valley-folded and overlapped on the upper second region 31B. As shown in FIG. 6 (f), the inner elastic portion 27 is not adhered to the end region 16A, and between the end region 16A and the inner elastic portion 27 as a pocket for containing excrement. A functional space 30 will be formed.

In the diaper according to the second embodiment as described above, the following effects can be obtained.
(2-1) On the outside adjacent to the end region 16A, space portions 30F and 30R functioning as pockets of excrement whose three directions are surrounded by the continuous bonding portion 25Y are formed. Excrements infiltrate into the space portions 30F and 30R from the opening end on the crotch 10C side. Since the space portions 30F and 30R are surrounded by the continuous adhesive portion 25Y, it is possible to suppress belly and back leakage of excrement in the space portions 30F and 30R from the portion of the waist opening 10A.

(2-2) By providing the partial bonding portion 25X in the second bonding region 22B, the bonding area is reduced as compared with the case where the second adhesive 25 is applied in a solid manner, and the amount of the second adhesive 25 used is reduced. While being able to reduce, the breathability inside and outside the diaper can be improved.

(2-3) The outer part of the continuous bonding part 25Y can exhaust the moisture in the inside of the diaper 10 through the communication passage 22Z by the partial bonding part 25X, and this also allows the air permeability inside and outside the diaper It can be improved.

The second embodiment described above can be implemented with appropriate modifications as follows.
In the margin portion 34, the region close to the waist opening 10A may be the partial bonding portion 25X, and the region near the space portions 30F and 30R may be the continuous bonding portion 25Y. That is, the margin portion 34 may be provided with a partial bonding portion 25X and a continuous bonding portion 25Y extending in the front-rear direction and extending in the circumferential direction. Thereby, it is possible to suppress the excrement of the space portions 30F and 30R from leaking from the portion of the waist opening 10A while reducing the amount of use of the second adhesive.

-In the partially bonded portion 25X, the bonded portion 22X and the non-bonded portion 22Y constituting the stripe pattern may be inclined with respect to the front-rear direction as long as they extend in the front-rear direction. It may have a shape or a wavy shape.

In the partially bonded portion 25X, the bonded portion 22X and the non-bonded portion 22Y constituting the stripe pattern may extend in the circumferential direction.
Third Embodiment
FIG. 7 is a plan view showing the bonding area of the upper area corresponding to FIG. 3A in the diaper of the third embodiment. In the diaper of the third embodiment, the partial bonding portion 25X of the diaper of the second embodiment is formed not by a hot melt adhesive but by heat fusion. Partially bonded portion 25X is provided outside continuous bonded portion 25Y for forming space portions 30F and 30R functioning as a pocket, and has a plurality of bonded portions 22X having a dot shape and non-bonded portions 22Y other than bonded portions 22X. And is composed of. The bonding portions 22X are provided at regular intervals in the front-rear direction and the waist direction, and between the bonding portions 22X are non-bonding portions 22Y extending in the front-rear direction and the waist direction. As described above, the upper elastic member 15U extends in the circumferential direction and is disposed at the non-adhesive portion 22Y extending in the circumferential direction.

Next, the manufacturing method of the diaper of 3rd Embodiment is demonstrated. 8 (a) to 8 (d) are the same as the diaper manufacturing method of the second embodiment, and therefore the details will be omitted. As shown in FIG. 8 (e), the hot melt adhesive as the second adhesive 25 is coated solidly on the outside adjacent to the end region 16A so as to have a concave shape, and the continuous adhesive portion 25Y is configured. Be done (continuous bonding process).

As shown in FIG. 8F, the inner elastic portion 27 in which the upper elastic member 15U is sandwiched between the sheets is valley-folded and overlapped with the upper second region 31B. Thereby, the inner elastic portion 27 is temporarily fixed to the second bonding area 22B in the continuous bonding section 25Y. Thereafter, the outer sheet portion 26 and the inner elastic portion 27 which are superposed are collectively heat-melted by being sandwiched and heated at a predetermined pressure by the heat-melting head. That is, the heating portion of the heat melting head corresponds to the pattern of the bonding portion 22X, and sandwiches, presses and heats the upper elastic members 15U extended in the circumferential direction. The position to press and heat is a position between the upper elastic members 15U extending in the circumferential direction. Thereby, the outer sheet portion 26 and the inner elastic portion 27 are integrated by the partial bonding portion 25X by heat fusion on the outside of the continuous bonding portion 25Y. At this time, the upper elastic member 15U is not cut by heat (partial bonding process).

In the diaper according to the third embodiment as described above, the following effects can be obtained.
(3-1) The partial bonding portion 25X provided on the outer side of the continuous bonding portion 25Y is not constituted by the hot melt adhesive as the second adhesive 25, but is constituted by heat fusion. Therefore, the second adhesive 25 is only used in the continuous bonding section 25Y, and the amount of use of the second adhesive 25 can be reduced as a whole. Compared to the case where the second adhesive 25 is applied in a solid state, the bonding area can be reduced, and the air permeability inside and outside the diaper can be improved.

(3-2) Since the heat fusion is performed between the upper elastic members 15U, it is possible to prevent the upper elastic members 15U from being broken by heat.
(3-2) The second adhesive 25 temporarily fixes the inner elastic portion 27 to the outer sheet portion 26 at the stage prior to the thermal fusion, and the thermal bonding between the upper elastic members 15U is accurately performed. be able to. Then, it is possible to prevent the upper elastic member 15U from being broken by heat due to the fusion position being shifted.

In addition, the said 3rd Embodiment can also be changed suitably as follows, and can also be implemented.
The positions of the bonding portions 22X by heat welding may not be at regular intervals as long as the extending position of the upper elastic member 15U is avoided.

The plurality of bonding portions 22X having a dot shape may be made of a hot melt adhesive instead of heat fusion. Even in such a case, the amount of use of the second adhesive 25 can be reduced as compared with the case of the solid coating. When the second adhesive 25 is used, the adhesive portion 22X and the upper elastic member 15U may overlap. The second adhesive 25 constituting the partial bonding portion 25X can be applied before and after the continuous bonding step (see FIG. 8E).

In the margin portion 34, the region close to the waist opening 10A may be the partial bonding portion 25X, and the region near the space portions 30F and 30R may be the continuous bonding portion 25Y.
Fourth Embodiment
As shown in FIG. 9, in the diaper according to the fourth embodiment, the upper end portion and the lower end portion of the communication passage 22Z that constitute the waist opening 10A of the communication passage 22Z have open ends 36 in the second bonding region 22B, Improvements are being made. That is, the outer sheet portion 26 is positioned at the outermost side, and the upper elastic member 15U is sandwiched by a single sheet 27A to constitute the inner elastic portion 27. The outer sheet portion 26 and the sheet 27A are separate sheets so that the upper end portion and the lower end portion of the communication path 22Z configured between the outer sheet portion 26 and the sheet 27A have the open end 36. It is a structure.

Next, the manufacturing method of the diaper of 4th Embodiment is demonstrated. As shown in FIG. 10A, first, the outer sheet portion 26 is prepared. The outer sheet portion 26 prepared here includes an upper area equivalent portion 31 and a lower area equivalent portion 32. The lower elastic member 15D is disposed in the lower region equivalent portion 32 in a stretched state. As shown in FIG. 10B, an adhesive 33 such as a hot melt adhesive is applied to the upper region equivalent portion 31 and the lower region equivalent portion 32, and the sheet 28A constituting the outer elastic portion 28 is adhered. . Alternatively, the lower elastic member 15D to which the adhesive 33 is applied is disposed, and the sheet 28A is superimposed on the outer sheet portion 26. As a result, the lower elastic member 15D is sandwiched between the outer sheet portion 26 and the sheet 28A, and the outer sheet portion 26 is provided with the outer elastic portion 28 in the portion 32 corresponding to the lower region. The sheet 28A has a combined size of the upper area equivalent portion 31 and the lower area equivalent portion 32.

As shown in FIG. 10C, the second adhesive 25 is applied to the first adhesive region 22A of the upper region equivalent portion 31 and the third adhesive region 22C of the lower region equivalent portion 32. As shown in FIG. 10 (d), the end region 16A of the absorbent main body 16 is placed across the first bonding region 22A and the third bonding region 22C. Thereafter, in the second adhesive region 22B, the hot melt adhesive as the second adhesive 25 is coated solidly on the outside adjacent to the end region 16A so as to have a concave shape, and the continuous adhesive portion 25Y is configured. Be done (continuous bonding process). The continuous adhesive portion 25Y may be provided when the second adhesive 25 is applied to the first adhesive region 22A and the third adhesive region 22C.

Here, a series of single sheets 27A sandwiching the upper elastic member 15U are prepared. The sheet 27A here has a size corresponding to the upper region equivalent portion 31 when it is folded in half in order to sandwich the upper elastic member 15U. The upper elastic member 15U is disposed on the sheet 27A in a stretched state. Then, after an adhesive such as a hot melt adhesive is applied, the sheet 27A is bent in half and sandwiches the upper elastic member 15U. Alternatively, the upper elastic member 15U to which the adhesive is applied is disposed, the sheet 27A is folded in half, and the upper elastic member 15U is sandwiched. Thus, the inner elastic portion 27 is formed.

As shown in FIG. 10E, the inner elastic portion 27 is superimposed on the second bonding area 22B of the outer sheet portion 26 from the top of the end area 16A. The inner elastic portion 27 is temporarily fixed to the second bonding region 22B in the continuous bonding portion 25Y. As shown in FIG. 10 (f), thereafter, the outer sheet portion 26 and the inner elastic portion 27 which are superposed are collectively heat-melted by sandwiching and heating with a predetermined pressure by the heat-melting head. Specifically, the thermal melting unifies the half-folded sheet 27A and the outer sheet portion 26. The heating portion of the heat melting head corresponds to the pattern of the bonding portion 22X, and sandwiches, presses and heats between the upper elastic members 15U extended in the circumferential direction. The position to press and heat is a position between the upper elastic members 15U extending in the circumferential direction. As a result, the outer sheet portion 26 and the inner elastic portion 27 are integrated by the partial bonding portion 25X by heat fusion on the outside of the continuous bonding portion 25Y. At this time, the upper elastic member 15U is not cut by heat (partial bonding process).

In the diaper according to the fourth embodiment as described above, the following effects can be obtained.
(4-1) Since the outer sheet portion 26 and the sheet 27A sandwiching the upper elastic member 15U constituting the inner elastic portion 27 are separated, the communication passage 22Z is formed between the outer sheet portion 26 and the sheet 27A. Is configured. The communication passage 22Z has an open end 36 at the upper end and the lower end, and moisture in the interior of the diaper 10 is exhausted through the communication passage 22Z. The communication passage 22Z in the first embodiment to the third embodiment has the upper end closed by the sheet, but the communication passage 22Z in the fourth embodiment does not close the upper end by the sheet, so the first embodiment According to the configuration, the air permeability inside and outside the diaper is improved as compared to the third embodiment.

(4-2) The partial bonding portion 25X provided on the outer side of the continuous bonding portion 25Y is not constituted by the hot melt adhesive as the second adhesive 25, but is constituted by heat fusion. Therefore, the second adhesive 25 is only used in the continuous bonding section 25Y, and the amount of use of the second adhesive 25 can be reduced as a whole.

(4-3) Since the heat fusion is performed between the upper elastic members 15U, it is possible to prevent the upper elastic members 15U from being broken by heat.
(4-4) The second adhesive 25 temporarily fixes the inner elastic portion 27 to the outer sheet portion 26 at the stage prior to the thermal fusion, and the thermal bonding between the upper elastic members 15U is accurately performed. be able to. Then, it is possible to prevent the upper elastic member 15U from being broken by heat due to the fusion position being shifted.

The fourth embodiment described above can be implemented with appropriate modifications as follows.
The positions of the bonding portions 22X by heat welding may not be at regular intervals as long as the extending position of the upper elastic member 15U is avoided.

The series of sheets 27A sandwiching the upper elastic member 15U may be separated at the position of the waist opening 10A and may be made of two sheet materials.
The plurality of bonding portions 22X having a dot shape may be made of a hot melt adhesive instead of heat fusion. Even in such a case, the amount of use of the second adhesive 25 can be reduced as compared with the case of the solid coating. When the second adhesive 25 is used, the adhesive portion 22X and the upper elastic member 15U may overlap.

In the margin portion 34, the region close to the waist opening 10A may be the partial bonding portion 25X, and the region near the space portions 30F and 30R may be the continuous bonding portion 25Y.
Fifth Embodiment
FIG. 11: is a diaper of 5th Embodiment, Comprising: It is a top view which shows the modification of 1st Embodiment. Specifically, in the lower regions 12FD, 12RD in the diaper of the first embodiment, the regions where the inner sheet portions 29F, 29R of the outer elastic portions 28F, 28R are bonded to the cover sheet 20 of the end regions 16A are It becomes the third adhesion area 22C. The second adhesive 25 is solidly coated in the third adhesive region 22C. Then, in the third adhesive region 22C, the cover sheet 20 in the end region 16A is entirely adhered to the inner sheet portions 29F and 29R by the second adhesive 25 (see FIG. 3B).

On the other hand, in the diaper of the fifth embodiment, in the end area 16A, the second adhesive 25 is not applied to the sheet side edge 18A in the width direction which is the waist direction. That is, in the first elastic member 21E constituting the solid gathers 21, one or several parts on the sheet side edge 18A side and / or the sheet side in the second elastic members 23E constituting the leg gathers 23 The second adhesive 25 is prevented from adhering to one or several portions on the edge 18A side.

In the diaper according to the fifth embodiment as described above, the following effects can be obtained.
(5-1) Since the solid gathers 21 and the leg gathers 23 are not restrained by the second adhesive 25 to the outer elastic portions 28F and 28R, they easily stand up to the outer elastic portions 28F and 28R.

(5-2) Since the second adhesive 25 is not applied to the portion of the sheet side edge portion 18A, the amount of the second adhesive 25 used can be reduced accordingly.
The fifth embodiment can be implemented with appropriate modifications as follows.

-The structure which does not apply | coat the 2nd adhesive agent 25 to the part of sheet | seat side edge part 18A may be employ | adopted only by belly side exterior body 12F, and may be employ | adopted only by back side exterior body 12R.
Sixth Embodiment
Drawing 12 is a diaper of a 6th embodiment, and is a figure showing the modification of a 1st embodiment. Specifically, in the first embodiment, also in the upper regions 12FU and 12RU facing the inner elastic portions 27F and 27R in the thickness direction of the diaper on the outer side of the end region 16A on the opposite side to the skin, the inside The sheet portions 29F, 29R and the outer sheet portions 26F, 26R extend in a state where they are adhered to each other by the first adhesive 24.

On the other hand, in the sixth embodiment, the inner sheet portions 29F and 29R and the first adhesive 24 are omitted in the upper regions 12FU and 12RU. The outer elastic portions 28F and 28R are configured by sandwiching the lower elastic members 15FD and 15RD with the outer sheet portions 26F and 26R and the inner lower sheet portions 29F 'and 29R'.

In the diaper according to the sixth embodiment as described above, the following effects can be obtained.
(6-1) In the upper regions 12FU and 12RU, the inner sheet portions 29F and 29R are omitted, and accordingly, the first adhesive 24 is also omitted. This can reduce the amount of sheet material and adhesive used.

The sixth embodiment can be implemented with appropriate modifications as described below.
-In the upper area 12FU, 12RU, the inner sheet portion may be omitted, and accordingly, the configuration in which the first adhesive is omitted may be adopted only for the ventral exterior body 12F, or adopted for only the dorsal exterior body 12R. You may

Seventh Embodiment
FIG. 13: is a diaper of 7th Embodiment, Comprising: It is a figure which shows the modification of 1st Embodiment. Specifically, in the lower regions 12FD and 12RD, the inner sheet portions 29F and 29R are omitted in the portions overlapping with the end region 16A, and the outer sheet portions 26F and 26R are directly adhered to the cover sheet 20 (B Department). The lower elastic members 15FD and 15RD are arranged in a state in which the lower elastic members 15FD and 15RD are not stretched, for example, in a cut state, in a portion B which is on the end region 16A. Alternatively, the lower elastic members 15FD and 15RD do not exist. On the other hand, in the lower regions 12FD and 12RD, the inner sheet portions 29F and 29R extend and sandwich the lower elastic members 15FD and 15RD in a stretched state in the regions on both sides with respect to the end region 16A Part C).

In the diaper according to the seventh embodiment as described above, the following effects can be obtained.
(7-1) In the lower regions 12FD and 12RD, the inner sheet portions 29F and 29R are omitted at portions overlapping with the end region 16A, and the outer sheet portions 26F and 26R are directly adhered to the cover sheet 20 (B Department). Therefore, the sheet material and the adhesive used in the relevant portion can be reduced.

The seventh embodiment described above can be implemented with appropriate modifications as follows.
-The structure shown by B part and C part may be employ | adopted only by ventral-side exterior body 12F, and may be employ | adopted only by back-side exterior body 12R.

Eighth Embodiment
FIG. 14: is a diaper of 8th Embodiment, Comprising: It is a figure which shows the modification of 1st Embodiment. Specifically, the open ends of the space portions 30F and 30R functioning as pockets for storing excrement are located not at the lower end portions of the upper regions 12FU and 12RU but at the lower end portions of the lower regions 12FD and 12RD. The outer sheet portions 26F and 26R and the inner sheet portions 29F and 29R sandwich the upper elastic members 15FU and 15RU in the skin-side upper regions 12FU and 12RU with respect to the end region 16A. On the other hand, in the lower regions 12FD and 12RD, there is no elastic member that constitutes the waist gather or the tummy gather. That is, the outer sheet portions 26F, 26R and the inner sheet portions 29F, 29R do not sandwich the elastic members constituting the waist gather or the tummy gather in the lower regions 12FD, 12RD.

Further, the outer side of the upper area 12FU, 12RU and the lower area 12FD, 12RD on the opposite side to the skin of the end area 16A is the inner sheet portions 29F, 29R and as in the sixth embodiment (see FIG. 12). The first adhesive 24 is omitted. The outer elastic portions 28F and 28R are configured by sandwiching the lower elastic members 15FD and 15RD with the outer sheet portions 26F and 26R and the inner sheet portions 29F and 29R forming the space portions 30F and 30R and the end portion area 16A. There is. As in the sixth embodiment (see FIG. 12), the outer elastic parts 28F and 28R sandwich the lower elastic members 15FD and 15RD with the outer sheet parts 26F and 26R and the inner lower sheet parts 29F 'and 29R'. It may be configured.

In the diaper according to the eighth embodiment as described above, the following effects can be obtained.
(8-1) When the diaper is removed from the wearer, the joint 11 is torn and cut from the upper end to the lower end or from the lower end to the upper end.

The outer sheet portions 26F and 26R and the inner sheet portions 29F and 29R extend over the upper areas 12FU and 12RU and the lower areas 12FD and 12RD on the inner side opposite to the skin side with the end area 16A and on the opposite side. Extends. Therefore, in the bonding portion 11, four sheets are uniformly bonded from the upper end to the lower end. Therefore, when the joint portion 11 is torn up and down, it is possible to prevent transverse tearing from the location of the joint portion 11 in the middle direction thereof.

(8-2) The open ends of the space portions 30F and 30R functioning as pockets are located at the lower end portions of the lower regions 12FD and 12RD. Therefore, the capacities of the space portions 30F and 30R can be increased.

(8-3) On the inner side with respect to the end region 16A, the lower regions 12FD, 12RD do not have elastic members constituting the waist gather or the tummy gather. Therefore, the end region 16A can be prevented from shrinking and forming in the circumferential direction.

The eighth embodiment described above can be implemented with appropriate modifications as follows.
The open ends of the space portions 30F and 30R functioning as pockets are located at any position above the lower end portions of the lower regions 12FD and 12RD if they are below the lower end portions of the upper regions 12FU and 12RU It is also good.

-The structure which arranges the opening end of space part 30F and 30R to the lower end part of lower field 12FD and 12RD may be adopted only by belly side exterior body 12F, and may be adopted only by back side exterior body 12R. In addition, the opening ends of the space portions 30F and 30R are positioned below the lower ends of the upper regions 12FU and 12RU and above the lower ends of the lower regions 12FD and 12RD (ie, the space portions 30F and 30R Of the open end of the upper region 12FU, 12RU between the lower end portion of the upper region 12FU, 12RU, and the lower end portion of the lower region 12FD, 12RD) may be adopted only for the ventral exterior body 12F. May be adopted alone.

In addition, the said embodiment can also be changed suitably as follows and can also be implemented.
The upper areas 12FU and 12RU and the lower areas 12FD and 12RD may not be connected by the outer sheet portion 26. That is, the upper areas 12FU and 12RU and the lower areas 12FD and 12RD may be separated. The outer sheet part 26 should just be provided in the position which opposes the inner side elastic part 27 at least, and can be suitably changed by the structure of a diaper except it.

The region where the upper elastic member 15U located inside with respect to the absorbent main body 16 is disposed may overlap with the region where the lower elastic member 15D located outside the absorbent main body 16 is disposed. Further, the lower end portion of the region where the upper elastic member 15U is disposed and the upper end portion of the region where the lower elastic member 15D is disposed may be located at the same position in the boundary portion.

-Either the outer package 12F or the outer package 12R may be provided with the upper region 12FU, 12RU and the lower region 12FD, 12RD. In addition, the lower regions 12FD and 12RD (outside elastic portion 28) may be omitted in both the ventral exterior body 12F and the dorsal exterior body 12R.

-Although it is preferable that the space part 30 is provided in both the abdominal exterior body 12F and the back exterior body 12R, it may be provided only in at least one.
The disposable diaper may be a tape-type diaper.

-It may be a disposable diaper for infants or adults such as elderly people and disabled people who need nursing care. In addition, it may be for pets.
The outer sheet portion 26 constituting the exterior body 12, the sheet constituting the inner elastic portion 27, and the sheet constituting the outer elastic portion 28 may be liquid impermeable or liquid permeable It is also good.

10A: opening in the waist, 10C: crotch, 10F: front, 10L: opening in the leg, 10R: rear, 10 W: waist, 11: joint, 12FD, lower abdominal region, 12FU, belly 12R: Dorsal exterior body, 12RD: Dorsal lower region, 12RU: Dorsal upper region, 15D: Lower elastic member, 15FD: ventral lower elastic member, 15FU: ventral upper elastic member, 15RD: dorsal Lower side elastic member, 15 RD 1 ... back lower elastic member, 15 U ... upper elastic member, 15 RU ... back upper elastic member, 16 ... absorbent main body, 16 A ... end region, 17 ... back sheet, 18 ... absorbent, 18 A ... sheet side edge portion, 18B ... peripheral portion, 18F ... ventral side end portion, 18R ... back side end portion, 19 ... top sheet, 20 ... cover sheet, 21 ... solid gather, 21E ... first elastic member, 21S ... size Sheet, 22A: first bonding area, 22B: second bonding area, 22C: third bonding area, 22X: bonding section, 22Y: non-bonding section, 22Z: communicating path, 23: leg gather, 23E: second elastic member, 24: first adhesive 25: second adhesive 25A: adhesive 25X: partial bonding portion 25Y: continuous bonding portion 26: external sheet portion 26F: abdominal side external sheet portion 26R: dorsal side external Seat portion 27: inner elastic portion 27A: sheet 27F: ventral inner elastic portion 27R: dorsal inner elastic portion 28: outer elastic portion 28A: sheet 28F: abdominal outer elastic portion 28R: back Outer side elastic portion, 29: internal sheet portion, 29F: abdominal side internal sheet portion, 29R: dorsal side internal sheet portion, 30F: abdominal side space portion, 30R: dorsal side space portion, 31: upper region equivalent portion, 31A ... Upper first area, 31B ... upper part 2 region, 32 ... lower region corresponding parts, 33 ... adhesive, 34 ... margin, 36 ... opening end.

Claims (17)

1. A first exterior body constituting a front body,
   A second exterior body that constitutes the back body,
   An absorbent main body having end regions overlapping the first exterior body and the second exterior body at both end portions in the front-rear direction, and forming a crotch between the first exterior body and the second exterior body; A disposable diaper provided with
   At least one of the first and second sheaths is:
   An inner elastic portion including an elastic member extending in the circumferential direction and expanding and contracting, and the elastic member being sandwiched between sheets, the inner elastic portion being located on the inner side closer to the skin of the wearer than the absorbent main body Inner elastic part,
   An outer sheet portion opposite to the skin with respect to the absorbent main body, at least an external sheet portion positioned opposite to the inner elastic portion, and a position between the position of the outer sheet portion and the absorbent main body A sheet portion comprising at least one or both of inner sheet portions positioned opposite to the inner elastic portion;
   The disposable diaper provided with the partial adhesion part which adheres the said sheet | seat part and the said inner side elastic part partially on the both sides of the said end area | region in the said waist circumference direction.
2. The disposable diaper according to claim 1, wherein the partially bonded portions have bonded portions at regular intervals.
3. The inner elastic portion is non-adhesive to the end region,
   The disposable diaper is such that the sheet portion and the inner elastic portion are continuous at a peripheral portion adjacent to the end region, and the open end in the end region faces the crotch. Further comprises a continuous bonding section,
   The disposable diaper according to claim 1, wherein the partial adhesive portion is provided outside the continuous adhesive portion.
4. The disposable diaper according to claim 1 or 2, wherein the partial bonding portion is constituted by a bonding portion and a non-bonding portion which extend in the front-rear direction and are alternately arranged in the waist direction.
5. The disposable diaper according to claim 1 or 2, wherein the partially bonded portion is configured by a plurality of bonded portions having a dot shape and a non-bonded portion other than the bonded portion.
6. The non-adhesive portion includes a region extending in the circumferential direction of the cylinder and coinciding with the extension position of the elastic member,
   The disposable adhesive according to claim 5, wherein, in the partially bonded portion, any one or both of the outer sheet portion and the inner sheet portion and the inner elastic portion are bonded by heat fusion in the bonded portion. Diapers.
7. 6. The partial adhesive portion according to any one of claims 1 to 5, wherein any one of the outer sheet portion and the inner sheet portion is bonded to the inner elastic portion by a hot melt adhesive. Description disposable diaper.
8. At least one of the first exterior body and the second exterior body is:
   An upper area and a lower area located on the crotch side of the upper area;
   The upper region comprises the inner elastic portion;
   The lower region is an outer elastic portion including a lower elastic member extending in the circumferential direction and expanding and contracting, and the lower elastic member is sandwiched between sheets, the outer side located outside the absorbent main body The disposable diaper according to any one of claims 1 to 7, comprising an elastic portion.
9. In the partially bonded portion, a waist opening portion formed by joining both ends in the waist direction of the first exterior body and the second exterior body between the sheet portion and the inner elastic portion The disposable diaper according to any one of claims 1 to 8, further comprising a communication passage connecting an upper end portion and a lower end portion of the inner elastic portion opposite to the upper end portion.
10. A first exterior body constituting a front body,
    A second exterior body that constitutes the back body,
    An absorbent main body including an end region overlapping the first exterior body and the second exterior body at both end portions in the front-rear direction, and forming a crotch between the first exterior body and the second exterior body A method of manufacturing a disposable diaper, comprising:
    At least one of the first and second sheaths is:
    An inner elastic portion including an elastic member extending in the circumferential direction and expanding and contracting, and the elastic member being sandwiched between sheets, the inner elastic portion being located on the inner side closer to the skin of the wearer than the absorbent main body Inner elastic part,
    An outer sheet portion opposite to the skin with respect to the absorbent main body, at least an external sheet portion positioned opposite to the inner elastic portion, and a position between the position of the outer sheet portion and the absorbent main body A sheet portion provided with at least one or both of the inner sheet portions positioned opposite to the inner elastic portion;
    The manufacturing method is
    The manufacturing method of a disposable diaper including the partial adhesion process which adheres the said sheet | seat part and the said inner elastic part partially on the both sides of the said end area in the said waist circumference direction.
11. The manufacturing method of the disposable diaper according to claim 10, wherein in the partial bonding step, bonding portions are provided at regular intervals.
12. A continuous bonding step of bonding the sheet portion and the inner elastic portion in the peripheral portion adjacent to the end portion region so that the sheet portion and the inner elastic portion are continuous and the open end in the end portion region faces the crotch The method for producing a disposable diaper according to claim 10 or 11, further comprising.
13. In the partial bonding step, the sheet portion and the inner elastic portion are bonded so as to extend in the front-rear direction and to alternately align the bonded portion and the non-bonded portion in the circumferential direction. The manufacturing method of the disposable diaper as described.
14. The disposable diaper according to claim 10, wherein in the partial bonding step, the sheet portion and the inner elastic portion are bonded such that a plurality of bonded portions having a dot shape and a non-bonded portion other than the bonded portion are provided. Manufacturing method.
15. In the partial bonding step, one or both of the outer sheet portion and the inner sheet portion and the inner elastic portion are provided such that a plurality of bonded portions having a dot shape and non-bonded portions other than the bonded portion are provided. And are bonded by heat fusion,
    The method for manufacturing a disposable diaper according to claim 14, wherein the non-adhesive portion extends in the circumferential direction of the waist and coincides with the extension position of the elastic member.
16. The disposable according to any one of claims 10 to 14, wherein in the partial bonding step, any one of the outer sheet portion and the inner sheet portion is bonded to the inner elastic portion by a hot melt adhesive. How to make a diaper.
17. At least one of the first exterior body and the second exterior body is:
    An upper area and a lower area located on the crotch side of the upper area;
    The upper region comprises the inner elastic portion;
    The lower region is an outer elastic portion including a lower elastic member extending in the circumferential direction and expanding and contracting, and the lower elastic member is configured by sandwiching the lower elastic member with a sheet, and the outer elastic portion is positioned outside the absorbent main body The outer elastic portion to
    The manufacturing method is
    Forming the outer elastic portion by sandwiching the lower elastic member with a sheet in the lower region;
    The method for manufacturing a disposable diaper according to any one of claims 10 to 16, further comprising: arranging and bonding the end region across the outer elastic portion and the sheet portion.

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