CN111343954A

CN111343954A - Disposable diaper and method for manufacturing disposable diaper

Info

Publication number: CN111343954A
Application number: CN201880073609.8A
Authority: CN
Inventors: 黑原健志
Original assignee: Oji Holdings Corp
Current assignee: Oji Holdings Corp
Priority date: 2017-12-15
Filing date: 2018-12-05
Publication date: 2020-06-26
Also published as: JP7374768B2; JPWO2019116982A1; WO2019116982A1

Abstract

A disposable diaper (10) is provided with: a ventral outer covering (12F); a backside outer packaging body (12R); and an absorbent body (16) having end regions (16A) that overlap the front-side outer cover (12F) and the back-side outer cover (12R) at both ends in the front-back direction, and a crotch section (10C) formed between the front-side outer cover (12F) and the back-side outer cover (12R). At least one of the ventral-side outer body (12F) and the dorsal-side outer body (12R) is provided with: inner elastic parts (27F, 27R) located on the inner side of the absorbent main body (16); a sheet section provided with either one or both of an outer sheet section (26) and an inner sheet section (29), wherein the outer sheet section (26) and the inner sheet section (29) are positioned on the outer side of the absorbent body (16) and face at least the inner elastic sections (27F, 27R); and a partial adhesive section (25X) that partially adheres the sheet section and the inner elastic sections (27F, 27R) on both sides of the end region (16A) in the girth direction.

Description

Disposable diaper and method for manufacturing disposable diaper

Technical Field

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

Background

The disposable diaper of patent document 1 includes an inner elastic portion located inside an absorbent main body, and the absorbent main body and the inner elastic portion are not bonded to each other. The outer sheet portion and the inner elastic portion located at opposite positions on both sides of the absorbent body in the girth direction are bonded to each other entirely with a hot-melt adhesive.

Documents of the prior art

Patent document

Patent document 1: japanese patent application laid-open No. 6229787

Disclosure of Invention

Problems to be solved by the invention

In a disposable diaper, an outer sheet portion, an inner elastic portion, and the like are configured by overlapping a plurality of sheet elements, and the sheet elements are bonded to each other with a hot melt adhesive. Therefore, it is required to reduce the amount of the hot melt adhesive used. In addition, the hot melt adhesive is a factor that hinders the breathability inside and outside the diaper, and it is required to improve the breathability inside and outside the diaper.

The invention aims to provide a disposable diaper capable of reducing the usage amount of an adhesive and improving the air permeability inside and outside the diaper and a method for manufacturing the disposable diaper.

Means for solving the problems

A disposable diaper for solving the above problems includes: a 1 st outer package which constitutes a front body panel; a 2 nd exterior body constituting a rear body panel; and an absorbent main body having end regions overlapping with the 1 st outer cover and the 2 nd outer cover at both ends in a front-rear direction, and constituting a crotch portion between the 1 st outer cover and the 2 nd outer cover. At least one of the 1 st package and the 2 nd package includes: an inner elastic section including an elastic member extending and contracting in a girth direction, the inner elastic section being configured by sandwiching the elastic member by a sheet, and being located on an inner side of the absorbent main body, the inner side being a side closer to a wearer's skin; a sheet portion including one or both of an outer sheet portion and an inner sheet portion, the outer sheet portion being located on an outer side of the absorbent main body on a side opposite to the skin and facing at least the inner elastic portion, and the inner sheet portion being located at a position facing at least the inner elastic portion at a position between the position of the outer sheet portion and the absorbent main body; and a partial adhesive portion that partially adheres both sides of the end region in the waist circumferential direction of the panel portion and the inner elastic portion.

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

In the above-described disposable diaper, the partial adhesive part may have an adhesive part at a constant interval.

In the above-described disposable diaper, the inner elastic portion may not be bonded to the end region, the disposable diaper may further include a continuous bonded portion in a peripheral portion adjacent to the end region, the continuous bonded portion continuously bonding the sheet portion and the inner elastic portion so that an open end in the end region faces the crotch portion, and the partial bonded portion may be provided outside the continuous bonded portion.

According to the above configuration, by providing the continuous adhesive portion, a pocket for containing excrement can be formed in the end region. Further, by providing the continuous adhesive portion, leakage of excrement contained in the pocket from the waist opening can be suppressed.

In the above-described disposable diaper, the partial adhesive portions may be constituted by adhesive portions and non-adhesive portions extending in the front-rear direction and alternately arranged in the girth direction.

According to the above configuration, by providing the adhesive portion and the non-adhesive portion in a stripe pattern, the adhesive area is reduced, the amount of adhesive used can be reduced, and the air permeability inside and outside the diaper can be improved, as compared with the case of full-face adhesion.

In the above-described disposable diaper, the partial adhesive portion may be constituted by a plurality of adhesive portions having a dotted shape and non-adhesive portions other than the adhesive portions.

According to the above configuration, since the adhesive portion is formed in a dot shape, the adhesive area is reduced as compared with the case of full-surface adhesion, the amount of adhesive used can be reduced, and the air permeability inside and outside the diaper can be improved. In this case, the plurality of adhesive portions having a dot shape are formed by heat welding or a hot melt adhesive.

In the above-described disposable diaper, the non-bonded portion may include a region extending in the girth direction and corresponding to an extending position of the elastic member, and the partial bonded portion may be configured to bond the inner elastic portion and one or both of the outer sheet portion and the inner sheet portion to each other by heat welding in the bonded portion.

According to the above configuration, the partial adhesive portion can be provided by thermal fusion. Further, the elastic member extends in the non-bonded portion, so that the elastic member can be prevented from being cut by thermal welding.

In the above-described disposable diaper, the partial adhesive part may be configured to bond the inner elastic part and one of the outer sheet part and the inner sheet part to each other with a hot-melt adhesive.

According to the above configuration, the inner elastic portion and one of the outer sheet portion and the inner sheet portion can be bonded to each other with a hot-melt adhesive.

In the above-described disposable diaper, at least one of the 1 st outer package and the 2 nd outer package may include an upper region and a lower region located on a crotch side of the upper region, the upper region including the inner elastic portion, the lower region including a lower elastic member extending and contracting in the girth direction, and an outer elastic portion configured by sandwiching the lower elastic member with a sheet, and the outer elastic portion may be located outside the absorbent main body.

According to the above configuration, by providing the outer elastic portion, the region immediately in front of the upper region where the excrement flows is pressed toward the skin side, and the absorbent main body can easily absorb the excrement.

In the above-described disposable diaper, the partial adhesive portion may include a communication path between the sheet portion and the inner elastic portion, the communication path communicating an upper end portion of a waist opening with a lower end portion of the inner elastic portion on a side opposite to the upper end portion, the waist opening being formed by joining both end portions of the 1 st outer package and the 2 nd outer package in the waist circumferential direction.

According to the above configuration, the elastic member is contracted to provide the communication path in the non-adhesive portion, thereby further improving the air permeability between the inside and outside of the diaper.

A method for manufacturing a disposable diaper for solving the above problems, the disposable diaper comprising: a 1 st outer package which constitutes a front body panel; a 2 nd exterior body constituting a rear body panel; and an absorbent main body having end regions overlapping the 1 st outer package and the 2 nd outer package at both ends in a front-rear direction thereof, and a crotch portion formed between the 1 st outer package and the 2 nd outer package, wherein at least one of the 1 st outer package and the 2 nd outer package includes: an inner elastic section including an elastic member extending and contracting in a girth direction, the inner elastic section being configured by sandwiching the elastic member by a sheet, the inner elastic section being located on an inner side of the absorbent main body, the inner side being a side closer to a skin of a wearer; and a sheet portion including either one or both of an outer sheet portion and an inner sheet portion, the outer sheet portion being located on an outer side of the absorbent main body on a side opposite to the skin and facing at least the inner elastic portion, and the inner sheet portion being located at a position facing at least the inner elastic portion at a position between the position of the outer sheet portion and the absorbent main body, wherein 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 girth direction.

In the above method of manufacturing a disposable diaper, the adhesive portions may be provided at regular intervals in the partial adhesive step.

In the above-described method for manufacturing a disposable diaper, the method may further include a continuous bonding step of continuously bonding the sheet portion and the inner elastic portion to each other in the peripheral portion adjacent to the end region so that the open end of the end region faces the crotch portion.

In the above-described method for manufacturing a disposable diaper, in the partial bonding step, the sheet portion and the inner elastic portion may be bonded so that the bonded portions and the unbonded portions extend in the front-back direction and are alternately arranged in the girth direction.

In the above-described method for manufacturing a disposable diaper, the sheet portion and the inner elastic portion may be bonded to each other so as to provide a plurality of bonded portions having a dotted shape and unbonded portions other than the bonded portions in the partial bonding step.

In the above-described method for manufacturing a disposable diaper, in the partial bonding step, one or both of the outer sheet portion and the inner sheet portion may be bonded to the inner elastic portion by thermal welding so as to provide a plurality of bonding portions having a dot shape and unbonded portions other than the bonding portions, the unbonded portions extending in the girth direction and corresponding to the extending positions of the elastic members.

In the above-described method for manufacturing a disposable diaper, in the partial bonding step, the inner elastic portion and one of the outer sheet portion and the inner sheet portion may be bonded to each other with a hot-melt adhesive.

In the above-described method for manufacturing a disposable diaper, at least one of the 1 st outer package and the 2 nd outer package may include an upper region and a lower region located on a crotch side of the upper region, the upper region including the inner elastic section, the lower region including a lower elastic member extending and expanding in a girth direction, the lower region including an outer elastic section configured by sandwiching the lower elastic member with a sheet, the outer elastic section being located on an outer side of the absorbent main body, the method further including: a step of forming the outer elastic portion by sandwiching the lower elastic member by a sheet in the lower region; and a step of arranging and bonding the end region across the outer elastic portion and the sheet portion.

Drawings

Fig. 1 is a perspective view of a pants-type disposable diaper according to embodiment 1.

Fig. 2(a) is a plan view showing a developed state of the pants-type disposable diaper of fig. 1, viewed from a skin surface side in contact with the skin, and fig. 2(B) is a cross-sectional view taken along line 2B-2B of fig. 2 (a).

Fig. 3(a) is a plan view showing a bonded region of an upper region of the pants-type disposable diaper of fig. 1 corresponding to fig. 2(a), and fig. 3(b) is a plan view showing a bonded region of a lower region of the pants-type disposable diaper of fig. 1 corresponding to fig. 2 (a).

Fig. 4(a) to 4(f) are views showing a manufacturing process of the pants-type disposable diaper of fig. 1, fig. 4(a) is a view showing a state where an upper elastic member and a lower elastic member are disposed in an outer panel, fig. 4(b) is a view showing a state where one inner panel is superposed on the upper elastic member and the lower elastic member, fig. 4(c) is a view showing a state where an adhesive is applied to a region where an end region of an absorbent body is bonded and a region where an inner elastic portion is bonded, fig. 4(d) is a view showing a state where the absorbent body is placed, fig. 4(e) is a view showing a state where the inner elastic portion is folded back, and fig. 4(f) is a view showing a state where the inner elastic portion is disposed.

Fig. 5 is a plan view showing an unfolded state of the pants-type disposable diaper in embodiment 2.

Fig. 6(a) to 6(f) are views showing a manufacturing process of the pants-type disposable diaper of fig. 5, fig. 6(a) is a view showing a state where an upper elastic member and a lower elastic member are arranged in an outer panel, fig. 6(b) is a view showing a state where one inner panel is superposed on the upper elastic member and the lower elastic member, fig. 6(c) is a view showing a state where an adhesive is applied to a region where an end region of an absorbent body is bonded, fig. 6(d) is a view showing a state where the absorbent body is placed, fig. 6(e) is a view showing a state where an adhesive is applied to the outside of the end region and an inner elastic portion is folded back, and fig. 6(f) is a view showing a state where the inner elastic portion is arranged.

Fig. 7 is a plan view showing an unfolded state of the pants-type disposable diaper according to embodiment 3.

Fig. 8(a) to 8(f) are views showing a manufacturing process of the pants-type disposable diaper of fig. 7, fig. 8(a) is a view showing a state where an upper elastic member and a lower elastic member are arranged in an outer panel, fig. 8(b) is a view showing a state where one inner panel is superposed on the upper elastic member and the lower elastic member, fig. 8(c) is a view showing a state where an adhesive is applied to a region where an end region of an absorbent body is bonded, fig. 8(d) is a view showing a state where the absorbent body is placed, fig. 8(e) is a view showing a state where a continuous adhesive portion is provided outside the end region and an inner elastic portion is folded back, and fig. 8(f) is a view showing a state where the upper region is integrated by welding.

Fig. 9 is a cross-sectional view of a pants-type disposable diaper according to embodiment 4.

Fig. 10(a) to 10(f) are views showing a manufacturing process of the pants-type disposable diaper of fig. 9, fig. 10(a) is a view showing a state in which a lower elastic member is disposed in an outer sheet, fig. 10(b) is a view showing a state in which a sheet is overlapped on the lower elastic member, fig. 10(c) is a view showing a state in which an adhesive is applied to a region where an end region of an absorbent body is bonded, fig. 10(d) is a view showing a state in which the absorbent body is placed and an upper elastic member is disposed on the sheet constituting an inner elastic portion, fig. 10(e) is a view showing a state in which the inner elastic portion is constituted by sandwiching the upper elastic member by the sheet and the inner elastic portion is placed by further providing a continuous bonding portion outside the end region, and fig. 10(f) is a view showing a state in which the upper region is integrated by welding.

Fig. 11 is a plan view showing a developed state of the pants-type disposable diaper according to embodiment 5, as viewed from the skin surface side in contact with the skin.

Fig. 12 is a cross-sectional view of a pants-type disposable diaper according to embodiment 6.

Fig. 13 is a plan view showing a developed state of a pants-type disposable diaper according to embodiment 7, as viewed from a skin surface side in contact with the skin.

Fig. 14 is a cross-sectional view of a pants-type disposable diaper according to embodiment 8.

Detailed Description

A pants-type disposable diaper according to embodiments 1 to 8 embodying the absorbent article of the present invention will be described with reference to fig. 1 to 14.

[ 1 st embodiment ]

As shown in fig. 1, a pants-type disposable diaper 10 (hereinafter simply referred to as "diaper 10") includes: a front body 10F having a shape that mimics the shape of the abdomen of a human body; a back body 10R having a shape that mimics the shape of the back of a human body; and a crotch portion 10C connecting the front body 10F and the rear body 10R.

The front body section 10F is configured to form a waist portion 10W surrounding a waist portion of a human body on the side opposite to the crotch portion 10C, and has a waist opening 10A at the upper end. The left and right end portions of the front body 10F, the left and right end portions of the rear body 10R, and the lower sides of the left and right end portions of the crotch portion 10C form a pair of left and right leg hole openings 10L, and the pair of leg hole openings 10L have a shape surrounding the thigh portion of the human body. The front body panel 10F and the back body panel 10R have joining portions 11 at both left and right ends in the girth direction.

Fig. 2(a) is a plan view showing a developed state of the pants-type disposable diaper, which is viewed from the skin side in contact with the skin, and fig. 2(B) is a cross-sectional view taken along line 2B-2B of fig. 2 (a). In fig. 2(b), the right side is the skin side of the diaper wearer.

The waist portion 10W of the front body panel 10F is constituted by the abdomen-side outer cover 12F, and the waist portion 10W of the back body panel 10R is constituted by the back-side outer cover 12R.

The abdomen-side outer package 12F and the back-side outer package 12R have rectangular shapes whose longitudinal directions are the girth direction. As an example, the sheet constituting the outer covering is a nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or another thermoplastic resin, and may be a liquid-permeable sheet or a liquid-impermeable sheet. The abdominal-side outer package 12F is configured by sandwiching the abdominal-side upper elastic member 15FU and the abdominal-side lower elastic member 15FD between the sheets constituting the abdominal-side outer package 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 configuring the back-side exterior body 12R. These elastic members 15FU, 15FD, 15RU, and 15RD are elastic bodies made of one or more materials selected from natural rubber, synthetic rubber, urethane, and the like, and are formed in a thread shape or a string shape. The elastic members 15FU, 15FD, 15RU, and 15RD are arranged in parallel to each other in the girth direction.

The front-side outer package 12F and the back-side outer package 12R are connected by the absorbent main body 16 constituting the crotch portion 10C. The absorbent main body 16 has a rectangular shape with the longitudinal direction being the front-rear direction. As shown in fig. 2(b), the absorbent main body 16 includes a back sheet 17, an absorbent body 18, a front sheet 19, and a protective sheet 20 that is overlapped with the back sheet 17 on the outer side thereof, and the back sheet 17 has liquid-impermeability and the front sheet 19 has liquid-permeability. In the diaper 10, the front sheet 19 is disposed on the inner side contacting the skin of the wearer, the back sheet 17 is disposed on the outer side of the absorbent body 18, and the protective sheet 20 is disposed on the outermost side so as to cover the back sheet 17. The protective sheet 20, the back sheet 17, the absorber 18, and the front sheet 19 are stacked in this order from the outside in the absorbent main body 16.

The material forming the back sheet 17 is, for example, a film made of a polyethylene resin having liquid impermeability. The back sheet 17 is formed with a plurality of fine holes in order to ensure air permeability. The material forming the front sheet 19 and the protective sheet 20 is, for example, one or more materials selected from woven fabric, nonwoven fabric, porous film, and the like. The front sheet 19 is, for example, a liquid-permeable nonwoven fabric made of fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which are hydrophilized. The protective sheet 20 is an outermost sheet and is a sheet that comes into contact with a user, and is formed of a nonwoven fabric or the like that improves the hand feeling.

The absorber 18 has an elongated band shape so as to straddle the front body 10F, the crotch portion 10C, and the back body 10R. The absorbent body 18 is composed of a molded body of an absorbent material and a core-spun layer that wraps the molded body. The absorbent material forming the absorbent body 18 is formed by molding an absorbent material such as fluff pulp, a super absorbent polymer, or a hydrophilic sheet. The core layer is made of a tissue, a nonwoven fabric, or the like. The absorber 18 is disposed and joined between the back sheet 17 and the front sheet 19. The absorber 18 extends between the front-side outer package 12F and the back-side outer package 12R, and includes a front-side end 18F and a back-side end 18R. In the absorbent body 18, the core layer may be omitted.

The back sheet 17, the front sheet 19, and the protective sheet 20 are rectangular sheets having a size larger than that of the absorbent member 18, and the absorbent member 18 is disposed in the central region, and the absorbent member 18 is not present in the peripheral region of the absorbent member 18. The front and rear side edges of the absorbent body 16 are sheet side edges 18A where the absorbent body 18 is not present. For example, the sheet side edge portion 18A is formed by overlapping the back sheet 17, the front sheet 19, and the protective sheet 20. In addition, the sheet side edge portion 18A is configured by folding both side edge portions of the protective sheet 20 extending in the front-rear direction inward, for example. The inner and outer surfaces of the region overlapping the

outer covers

12F and 12R in the front-rear direction of the absorbent main body 16 are end regions 16A, and the sheets constituting the outer covers are bonded to the end regions 16A. The end regions 16A are both ends of the absorbent body 16 in the front-rear direction, and are regions including the front-side end 18F and the back-side end 18R of the absorbent body 18, the peripheral portion 18B of these

ends

18F, 18R, and the sheet-side edge 18A.

The ventral outer body 12F includes a ventral upper region 12FU and a ventral lower region 12 FD. Back side exterior body 12R also includes back side upper region 12RU and back side lower region 12 RD.

As shown in fig. 2(b), in the abdomen-side upper region 12FU and the back-side upper region 12RU, the abdomen-side upper elastic member 15FU and the back-side upper elastic member 15RU are disposed on the inner side of the absorbent main body 16, that is, on the front sheet 19 side, and constitute the waist opening 10A and a part of the waist unit 10W. In the abdomen-side lower region 12FD and the back-side lower region 12RD, the abdomen-side lower elastic member 15FD and the back-side lower elastic member 15RD are disposed outside the absorbent main body 16, that is, on the back sheet 17 and the protective sheet 20 side, and constitute a part of the waistline portion 10W.

In the abdomen-side upper region 12FU, the plurality of abdomen-side upper elastic members are disposed in an extended state across both right and left end portions in the waist-surrounding direction between the sheets whose waist-surrounding direction is the longitudinal direction (between the abdomen-side outer sheet portion 26F and the abdomen-side inner sheet portion 29F). In the back-side upper region 12RU, the plurality of back-side upper elastic members 15RU are disposed between the sheets whose longitudinal direction is the girth direction (between the back-side outer sheet portion 26R and the back-side inner sheet portion 29R) in an extended state across both left and right end portions in the girth direction.

In the abdomen-side lower region 12FD, a plurality of abdomen-side lower elastic members 15FD are disposed between the sheets whose longitudinal direction is the waist-side direction (between the abdomen-side outer sheet 26F and the abdomen-side inner sheet 29F) across both left and right end portions in the waist-side direction. In the back-side lower region 12RD, the plurality of back-side lower elastic members 15RD are disposed between the sheets whose longitudinal direction is the girth direction (between the back-side outer sheet portion 26R and the back-side inner sheet portion 29R) across both left and right end portions in the girth direction. These elastic members 15FU, 15FD, 15RU, and 15RD constitute waist gathers and abdomen gathers in the waist portion 10W, and suppress the occurrence of abdominal leakage and back leakage.

As shown in fig. 2(b), the ventral-side lower region 12FD and the dorsal-side lower region 12RD are directly bonded to the protective sheet 20 of the end region 16A in the absorbent main body 16. As shown in fig. 2(a), the ventral lower elastic member 15FD is disposed in the end region 16A in a non-stretched state, for example, in a cut state. Most of the back-side lower elastic member 15RD is disposed in the end region 16A in a non-stretched state, for example, in a cut state. This allows the absorbent main body 16 to contract in response to contraction of the abdomen-side lower elastic member 15FD and the back-side lower elastic member 15RD, thereby suppressing formation of wrinkles in the absorbent main body 16. Further, it is possible to suppress the occurrence of a gap between the absorbent main body 16 and the skin, and to suppress abdominal leakage and back leakage.

Among the plurality of back-side lower elastic members 15RD, the plurality of back-side lower elastic members 15RD1 located in the vicinity of the back-side upper region 12RU along the lower end portions of the back-side upper region 12RU are arranged in an extended state, that is, in an uncut state, at the back-side end 18R of the absorbent body 18. Therefore, in the region where the back-side lower elastic member 15RD1 is arranged, the gathers 16B may be formed at the back-side end 18R. The thickness of the absorbent body 18 is thicker in the back-side end portion 18R where the gathers 16B are formed than in the region where the gathers 16B are not formed, and the absorbent body 16 can function as a guide portion for guiding excrement such as urine between the end portion 16A and the abdomen-side inner sheet portion 29F and the back-side inner sheet portion 29R.

As shown in fig. 2(b), the abdominal-side upper region 12FU is configured to have an abdominal-side inner elastic portion 27F by sandwiching the abdominal-side upper elastic member 15FU between sheets (an abdominal-side outer sheet portion 26F and an abdominal-side inner sheet portion 29F). The ventral-side lower region 12FD also constitutes a ventral-side outer elastic portion 28F in which the ventral-side lower elastic member 15FD is sandwiched by sheets (a ventral-side outer sheet portion 26F and a ventral-side inner sheet portion 29F). The ventral upper region 12FU and the ventral lower region 12FD are continuously connected by the ventral outer sheet 26F and the ventral inner sheet 29F.

The back-side upper region 12RU constitutes a back-side inner elastic portion 27R by sandwiching the back-side upper elastic member 15RU with pieces (the back-side outer piece portion 26R and the back-side inner piece portion 29R). The back-side lower region 12RD also constitutes a back-side outer elastic portion 28R by sandwiching the back-side lower elastic member 15RD with sheets (the back-side outer sheet portion 26R and the back-side inner sheet portion 29R). Dorsal upper region 12RU and dorsal lower region 12RD are continuously connected by dorsal outer sheet 26R and dorsal inner sheet 29R.

The abdomen-side outer panel 26F and the back-side outer panel 26R are outermost sheets located on the side opposite to the skin, and are folded inward at the portions of the waist opening 10A to be located on the skin side. The abdomen-side inner panel 29F and the back-side inner panel 29R are panels facing the abdomen-side outer panel 26F and the back-side outer panel 26R, respectively. More specifically, the

inner panels

29F and 29R are positioned between the

outer panels

26F and 26R and the absorbent body 16 on the outer side on the skin side of the absorbent body 16, are folded inward at the waist opening 10A, and are positioned between the absorbent body 16 and the

outer panels

26F and 26R on the inner side of the absorbent body 16.

The abdomen-side outer panel 26F and the abdomen-side inner panel 29F constituting the abdomen-side inner elastic portion 27F and the abdomen-side outer elastic portion 28F are bonded to each other with a 1 st adhesive 24 such as a hot melt adhesive, with the abdomen-side upper elastic member 15FU and the abdomen-side lower elastic member 15FD interposed therebetween. The folded portions of the abdominal-side outer panel portion 26F and the abdominal-side inner panel portion 29F constitute the waist opening 10A, and the two panels are overlapped to constitute the waist opening 10A, thereby improving the strength (see the left a portion in fig. 2 (b)).

The back-side outer sheet portion 26R and the back-side inner sheet portion 29R constituting the back-side inner elastic portion 27R and the back-side outer elastic portion 28R are bonded to each other with a 1 st adhesive 24 such as a hot melt adhesive, with the back-side upper elastic member 15RU and the back-side lower elastic member 15RD interposed therebetween. The folded portions of the back-side outer panel 26R and the back-side inner panel 29R constitute the waist opening 10A, and the two panels are overlapped to constitute the waist opening 10A, thereby improving the strength (see the right a portion in fig. 2 (b)).

Of the abdomen-side and back-side inner

elastic portions

27F and 27R, the abdomen-side and back-side

inner sheet portions

29F and 29R adjacent to the abdomen-side and back-side upper elastic members 15FU and 15RU are not bonded to the front sheet 19 of the end region 16A. In the abdomen-side inner elastic portion 27F and the back-side inner elastic portion 27R, the abdomen-side inner panel portions 29F folded back at the waist opening 10A are bonded to each other with a 2 nd adhesive 25 such as a hot melt adhesive in the peripheral region of the end region 16A. In addition, the protective sheet 20 of the end region 16A is also bonded to the abdomen-side inner sheet portion 29F by the 2 nd adhesive 25 such as a hot melt adhesive.

Here, fig. 3(a) is a plan view showing the bonding region of the upper region corresponding to fig. 2(a), and fig. 3(b) is a plan view showing the bonding region of the lower region corresponding to fig. 2 (a).

As shown in fig. 2(b) and 3(a), in the abdomen-side upper region 12FU, a region where the protective sheet 20 of the end region 16A is bonded to the abdomen-side inner panel 29F by the 2 nd adhesive 25 is a 1 st bonded region 22A. The ventral 1 st adhesive region 22A is coated with a 2 nd adhesive 25. In the 1 st adhesion region 22A, the protective sheet 20 in the end region 16A is entirely adhered to the abdomen-side inner panel portion 29F by the 2 nd adhesive 25. In addition, in the back-side upper region 12RU, a region where the protect sheet 20 of the end region 16A is adhered to the back-side inner sheet portion 29R by the 2 nd adhesive 25 becomes the 1 st adhesion region 22A. The back-side 1 st adhesive region 22A is also coated with the 2 nd adhesive 25, and the protective sheet 20 of the end region 16A is entirely adhered to the back-side inner sheet portion 29R by the 2 nd adhesive 25.

In the abdomen-side inner elastic portion 27F in the abdomen-side upper region 12FU, a region around the 1 st bonded region 22A and bonded to each other by the 2 nd adhesive 25 in the abdomen-side inner panel portions 29F folded back at the waist opening 10A becomes the 2 nd bonded region 22B. In the back-side inner elastic portion 27R in the back-side upper region 12RU, a region where the back-side inner panel portions 29R folded back at the waist opening 10A are bonded to each other with the 2 nd adhesive 25 is a 2 nd bonding region 22B. The 2 nd bonded region 22B in the abdominal-side inner elastic portion 27F and the back-side inner elastic portion 27R has a concave shape facing the crotch portion 10C by passing around the end region 16A. In the concave-shaped inner portion, the ventral-side inner elastic portion 27F and the dorsal-side inner elastic portion 27R are not bonded to the front sheet 19 of the end region 16A. Thus, a space 30F is provided between the abdomen-side inner sheet portion 29F of the abdomen-side inner elastic portion 27F and the front sheet 19 of the end region 16A, and the absorbent body 18 is also present in the space 30F, so that liquid such as excrement can be absorbed. A space 30R in which the absorbent body 18 is present is also provided between the back-side inner sheet portion 29R of the back-side inner elastic portion 27R and the front sheet 19 of the end region 16A, and the absorbent body 18 is also present in this space 30R, so that liquid such as excrement can be absorbed.

The 2 nd bonded region 22B having a concave shape includes the partial bonded portion 25X in the abdomen-side inner elastic portion 27F and the back-side inner elastic portion 27R. The partial adhesive sections 25X include a 2 nd adhesive 25 extending in the front-rear direction, and adhesive sections 22X and non-adhesive sections 22Y arranged alternately in the girth direction. The bonded portions 22X and the unbonded portions 22Y have a linear shape at equal intervals, and form a stripe pattern. In this way, in the partial bonded portion 25X, the 2 nd adhesive 25 is applied only to the bonded portion 22X, so that the bonded area is reduced as compared with the case where the 2 nd adhesive 25 is applied, the amount of the 2 nd adhesive 25 used is reduced, and the air permeability inside and outside the diaper is improved. In the non-bonded portion 22Y, the

inner sheet portions

29F and 29R facing each other are bent in the girth direction by the upper elastic members 15FU and 15RU, thereby constituting a communication path 22Z extending in the front-rear direction. The upper end of the communicating path 22Z is the waist opening 10A, and is closed by the two overlapped

inner sheet portions

29F and 29R and

outer sheet portions

26F and 26R (portion a), while the lower end of the communicating path 22Z is an open end 36 in which the mutually opposed

inner sheet portions

29F and 29R are not bonded to each other. When worn, moisture in the diaper 10 passes through the communication path 22Z and is exhausted through the two

sheet portions

29F, 29R, 26F, and 26R of the waist opening 10A, thereby improving the air permeability inside and outside the diaper.

The 2 nd adhesive region 22B includes a margin portion 34 between the waist opening 10A and the front end portion in the front-rear direction of the end region 16A, and the margin portion 34 has a predetermined width. The adhesive portions 22X and the non-adhesive portions 22Y are alternately provided in the margin portion 34, thereby constituting a short communication path 22Z extending in the front-rear direction, reducing the amount of the 2 nd adhesive 25 used, and improving the air permeability of the

space portions

30F, 30R and the outside.

As shown in fig. 3(b), in the abdomen-side lower region 12FD and the back-side lower region 12RD, the region where the abdomen-side inner sheet portion 29F and the back-side inner sheet portion 29R of the abdomen-side outer elastic portion 28F and the back-side outer elastic portion 28R are bonded to the protective sheet 20 in the end region 16A is the 3 RD bonding region 22C. The No. 3 bonding region 22C is also filled with the No. 2 bonding agent 25. In the 3 rd adhesion region 22C, the protective sheet 20 in the end region 16A is entirely adhered to the abdomen-side inner sheet portion 29F and the back-side inner sheet portion 29R by the 2 nd adhesive 25.

Here, the sizes of the ventral space 30F and the dorsal space 30R will be described. The ventral space 30F is larger and deeper than the back space 30R, and when the diaper 10 is discarded, the parts other than the ventral space 30F can be stored in a state of being bunched up.

The front sheet 19, which is the inner surface of the absorbent main body 16, is provided with three-dimensional gathers 21 at both ends in the front-rear direction. Each of the three-dimensional gather portions 21 includes a 1 st elastic member 21E extending in the front-rear direction of the absorbent main body 16 and a side sheet 21S sandwiching the 1 st elastic member 21E. The 1 st elastic member 21E is disposed on the side sheet 21S in a state where a plurality of elastic members are parallel to each other and are stretched by being coated with a hot melt adhesive, and is sandwiched between the side sheets 21S by folding the side sheets 21S in two. The 1 st elastic member 21E is made of the same material as the elastic members 15FU, 15FD, 15RU, 15 RD. The side sheet 21S is also formed of a sheet similar to the front sheet 19 and the protective sheet 20, and is formed of a long sheet extending in the front-rear direction, for example, a nonwoven fabric having liquid impermeability.

The side sheet 21S has a length in the front-rear direction that spans the abdominal-side upper region 12FU, the crotch portion 10C, and the back-side upper region 12 RU. The 1 st elastic member 21E has a length shorter than the length of the side sheet 21S in the front-rear direction, and has a length extending across the abdomen-side lower region 12FD, the crotch portion 10C, and the back-side lower region 12RD, for example.

The sheet-side edge 18A of the absorbent main body 16 is formed by folding back both side edges of the protective sheet 20 in the front-rear direction toward the center. The folded-back sheet-side edge portion 18A includes a leg gather portion 23. The leg gather portion 23 is configured by sandwiching the 2 nd elastic member 23E extending in the front-rear direction of the absorbent main body 16 by the sheet side edge portion 18A.

The 2 nd elastic member 23E also extends from the abdomen-side lower region 12FD to the back-side lower region 12RD through the crotch portion 10C in a state where a plurality of elastic members are parallel to each other and are coated with a hot melt adhesive and stretched.

Next, a method for manufacturing the diaper 10 will be described. As shown in fig. 4(a), an outer sheet 26 is prepared. The outer sheet 26 prepared here includes an upper region corresponding portion 31 and a lower region corresponding portion 32. The upper region corresponding portion 31 includes an upper 1 st region 31A and an upper 2 nd region 31B.

In the upper 1 st region 31A, the upper elastic member 15U is disposed in an extended state on the outer surface 31A 'in fig. 4(a), and in the lower region corresponding portion 32, the lower elastic member 15D is disposed in an extended state on the outer surface 32' in fig. 4 (a). As shown in fig. 4(b), an adhesive 25A is applied to the entire surface of the outer sheet portion 26, and one inner sheet portion 29 is superposed so as to cover the upper elastic member 15U and the lower elastic member 15D. Alternatively, the upper elastic member 15U and the lower elastic member 15D to which the adhesive agent 25A is applied are disposed, and the inner sheet portion 29 is overlapped with the outer sheet portion 26. Thereby, the adhesive 25A bonds and integrates the outer sheet portion 26 and the inner sheet portion 29. The inner elastic portion 27 and the outer elastic portion 28 are formed.

As shown in fig. 4(C), in the upper 2 nd region 31B of the upper region corresponding portion 31, the 2 nd adhesive 25 is applied to the 1 st adhesive region 22A, the 2 nd adhesive region 22B, and the 3 rd adhesive region 22C of the lower region corresponding portion 32. Here, the 1 st adhesive region 22A and the 3 rd adhesive region 22C are coated with the 2 nd adhesive 25. Then, the 2 nd adhesive agent 25 is applied to the 2 nd adhesion region 22B so that the adhesion portion 22X and the non-adhesion portion 22Y form a partial adhesion portion 25X in a stripe pattern (partial adhesion step). As shown in fig. 4(d), the end region 16A of the absorbent main body 16 is placed on the 1 st bonded region 22A of the upper region corresponding portion 31 and the 3 rd bonded region 22C of the lower region corresponding portion 32.

As shown in fig. 4(e), the inner elastic portion 27 of the upper elastic member 15U held by the sheet is concavely folded to overlap the upper 2 nd 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.

In the case of the diaper 10 according to embodiment 1, the following effects can be obtained.

(1-1) in the abdomen-side inner elastic portion 27F and the back-side inner elastic portion 27R, the 2 nd adhesive region 22B as the peripheral portion of the end region 16A is coated with a hot melt adhesive as the 2 nd adhesive 25 in a stripe pattern. Therefore, in the 2 nd adhesive region 22B, the adhesive area is reduced as compared with the case where the 2 nd adhesive 25 is filled, the amount of the 2 nd adhesive 25 used can be reduced, and the breathability inside and outside the diaper can be improved.

(1-2) in the non-bonded portion 22Y, the communication path 22Z extending in the front-rear direction is formed between the mutually opposed

inner sheet portions

29F, 29R by the upper elastic members 15FU, 15RU being flexed in the girth direction, and the moisture in the interior of the diaper 10 passes through the communication path 22Z and is exhausted through the two

sheet portions

29F, 29R, 26F, 26R of the girth opening 10A, whereby the air permeability in the interior and exterior of the diaper can also be improved.

(1-3) in the lower regions 12FD, 12RD, the outer elastic portions 28 are disposed outside the absorbent main body 16 and directly bonded to the end regions 16A of the absorbent main body 16. Therefore, even immediately before the upper regions 12FU, 12RU flow, the absorbent main body 16 can be placed against the skin of the wearer to easily absorb the excrement.

The above embodiment 1 can also be modified and implemented as follows.

The 2 nd adhesive 25 may be applied in a stripe pattern in the 2 nd adhesive region 22B and the 3 rd adhesive region 22C on the continuous surface, instead of being applied. In this case, the stripe pattern is not limited to the case where the adhesive portion and the non-adhesive portion constituting the stripe pattern extend in the front-rear direction, and may be configured to extend in the girth direction.

In the partial bonding portion 25X, the bonding portion 22X and the non-bonding portion 22Y constituting the stripe pattern may extend in the front-rear direction, may be inclined with respect to the front-rear direction, and may have not only a linear shape but also a broken line shape or a wavy line shape.

In the partial adhesive portions 25X, the adhesive portions 22X and the non-adhesive portions 22Y constituting a stripe pattern may extend in the girth direction.

[ 2 nd embodiment ]

Fig. 5 is a plan view showing the bonded region in the upper region corresponding to fig. 3(a) in the diaper of embodiment 2. In the diaper of embodiment 2, the continuous bonded portion 25Y is provided in the peripheral portion adjacent to the end portion region 16A in the 2 nd bonded region 22B in the abdomen-side upper region 12FU and the back-side upper region 12 RU. The continuous bonded portion 25Y has a concave shape with its open end facing the crotch portion 10C. The continuous adhesive portion 25Y is coated with a hot melt adhesive as the 2 nd adhesive 25. In the 2 nd bonding region 22B, the outer side of the continuous bonding portion 25Y constitutes a partial bonding portion 25X in which the 2 nd adhesive 25 forms a stripe pattern.

In the diaper described above,

space portions

30F and 30R function as pockets for receiving bodily waste since they are surrounded in three directions except the crotch portion 10C side by the continuous bonded portion 25Y. In the partial adhesion portion 25X, the non-adhesion portion 22Y forms a communication path 22Z.

Next, a method for manufacturing a diaper according to embodiment 2 will be described. As shown in fig. 6(a), an outer sheet 26 is prepared. The outer sheet 26 prepared here includes an upper region corresponding portion 31 and a lower region corresponding portion 32. The upper region corresponding portion 31 includes an upper 1 st region 31A and an upper 2 nd region 31B.

In the upper 1 st region 31A, the upper elastic member 15U is disposed in an extended state on the outer surface 31A 'in fig. 6(a), and in the lower region corresponding portion 32, the lower elastic member 15D is disposed in an extended state on the outer surface 32' in fig. 6 (a). As shown in fig. 6(b), an adhesive 25A is applied to the entire surface of the outer sheet portion 26, and one inner sheet portion 29 is superposed so as to cover the upper elastic member 15U and the lower elastic member 15D. Alternatively, the upper elastic member 15U and the lower elastic member 15D to which the adhesive agent 25A is applied are disposed, and the inner sheet portion 29 is overlapped with the outer sheet portion 26. Thereby, the adhesive 25A bonds and integrates the outer sheet portion 26 and the inner sheet portion 29. The inner elastic portion 27 and the outer elastic portion 28 are formed.

As shown in fig. 6(C), in the upper 2 nd region 31B of the upper region corresponding portion 31, the 1 st adhesive region 22A and the 3 rd adhesive region 22C of the lower region corresponding portion 32 are filled with the 2 nd adhesive 25. As shown in fig. 6(d), the end region 16A of the absorbent main body 16 is placed on the 1 st bonded region 22A of the upper region corresponding portion 31 and the 3 rd bonded region 22C of the lower region corresponding portion 32.

As shown in fig. 6(e), the adjacent outer side of the end region 16A is filled with the hot melt adhesive as the 2 nd adhesive 25 so as to have a recessed shape, thereby forming a continuous bonded portion 25Y (continuous bonding step). The continuous adhesive portion 25Y may be provided when the 2 nd adhesive 25 is applied to the 1 st adhesive region 22A and the 3 rd adhesive region 22C. Then, the 2 nd adhesive 25 is applied to the outside of the continuous adhesive portion 25Y in the 2 nd adhesive region 22B so that the adhesive portion 22X and the non-adhesive portion 22Y form a partial adhesive portion 25X in a stripe pattern (partial adhesive step).

The inner elastic portion 27 of the upper elastic member 15U held by the sheet is folded concavely and overlaps the upper 2 nd region 31B. As shown in fig. 6(f), the inner elastic portion 27 is not bonded to the end region 16A, and a space portion 30 is formed between the end region 16A and the inner elastic portion 27, and the space portion 30 functions as a pocket for containing excrement.

In the case of the diaper according to embodiment 2, the following effects can be obtained.

(2-1)

space portions

30F and 30R are formed on the adjacent outer sides of the end region 16A, and the

space portions

30F and 30R function as pockets for excreta while being surrounded in three directions by the continuous adhesive portion 25Y. The excrement enters

space portions

30F and 30R from the opening end on the crotch portion 10C side. Since the

space portions

30F and 30R are surrounded by the continuous bonded portion 25Y, the excreta in the

space portions

30F and 30R can be prevented from leaking from the portion of the waist opening 10A to the abdomen and the back.

(2-2) by providing the partial pressure-sensitive adhesive section 25X in the 2 nd pressure-sensitive adhesive region 22B, the pressure-sensitive adhesive area is reduced as compared with the case where the 2 nd pressure-sensitive adhesive 25 is applied, the amount of the 2 nd pressure-sensitive adhesive 25 used can be reduced, and the air permeability inside and outside the diaper can be improved.

(2-3) the outer side of the continuous bonded portion 25Y passes through the constituting part bonded portion 25X, and moisture on the inner side of the diaper 10 can be exhausted through the communicating path 22Z, whereby the air permeability inside and outside the diaper can be improved.

The above embodiment 2 can also be modified and implemented as follows.

In the margin portion 34, a region close to the waist opening 10A may be a partial adhesive portion 25X, and regions close to the

space portions

30F and 30R may be continuous adhesive portions 25Y. That is, the blank part 34 may be provided with a partial adhesive part 25X and a continuous adhesive part 25Y which are arranged in the front-rear direction and extend in the girth direction. This can reduce the amount of the 2 nd adhesive used, and can prevent the excrement in the

space portions

30F and 30R from leaking from the portion of the waist opening 10A.

In the partial bonding portion 25X, the bonding portion 22X and the non-bonding 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, and may have not only a linear shape but also a broken line shape or a wavy line shape.

[ 3 rd embodiment ]

Fig. 7 is a plan view showing the bonded region in the upper region corresponding to fig. 3(a) in the diaper of embodiment 3. The diaper of embodiment 3 is formed by hot melt bonding, not by forming the partial adhesive portion 25X with a hot melt adhesive, as compared with the diaper of embodiment 2. The partial pressure-sensitive adhesive portion 25X is provided outside the continuous pressure-sensitive adhesive portion 25Y, the continuous pressure-sensitive adhesive portion 25Y is used to form

space portions

30F and 30R functioning as pockets, and the partial pressure-sensitive adhesive portion 25X is composed of a plurality of pressure-sensitive adhesive portions 22X having a dotted shape and a pressure-sensitive adhesive-free portion 22Y other than the pressure-sensitive adhesive portion 22X. The adhesive portions 22X are arranged at equal intervals in the front-back direction and the girth direction, and the non-adhesive portions 22Y extending in the front-back direction and the girth direction are formed between the adhesive portions 22X. As described above, the upper elastic member 15U extends in the girth direction and is disposed in the non-bonded portion 22Y extending in the girth direction.

Next, a method for manufacturing a diaper according to embodiment 3 will be described. In addition, fig. 8(a) to (d) are the same as the method for manufacturing the diaper of embodiment 2, and therefore, the details are omitted. As shown in fig. 8 e, the adjacent outer side of the end region 16A is filled with the hot melt adhesive as the 2 nd adhesive 25 so as to have a recessed shape, thereby forming a continuous bonding portion 25Y (continuous bonding step).

As shown in fig. 8(f), the inner elastic portion 27 formed by sandwiching the upper elastic member 15U by the sheet is concavely folded to overlap the upper 2 nd region 31B. Thereby, the inner elastic portion 27 is temporarily fixed to the 2 nd bonded region 22B in the continuous bonded portion 25Y. Then, the overlapped external sheet portion 26 and the inner elastic portion 27 are collectively sandwiched and heated at a predetermined pressure by the thermal fusion head, thereby performing thermal fusion. That is, the heating portion of the thermal head is sandwiched between the upper elastic members 15U extending in the girth direction in accordance with the pattern of the adhesive portions 22X, and is pressurized and heated. The pressure-heated position is a position between the upper elastic members 15U extending in the girth direction. Thus, the outer side of the continuous bonded portion 25Y is integrated with the outer sheet portion 26 and the inner elastic portion 27 by the heat-welded partial bonded portion 25X. At this time, the upper elastic member 15U is not cut by heat (partial bonding step).

In the case of the diaper according to embodiment 3, the following effects can be obtained.

(3-1) the partial adhesive portion 25X provided outside the continuous adhesive portion 25Y is not constituted by a hot melt adhesive as the 2 nd adhesive 25 but constituted by hot melt. Therefore, the 2 nd adhesive 25 is used only in the continuous adhesive portion 25Y, and the amount of the 2 nd adhesive 25 used can be reduced as a whole. The bonded area is reduced as compared with the case of coating the 2 nd adhesive 25, and the air permeability inside and outside the diaper can be improved.

(3-2) since the thermal fusion is performed between the upper elastic members 15U, the upper elastic members 15U can be prevented from being broken due to heat.

(3-2) the 2 nd adhesive 25 temporarily fixes the inner elastic portion 27 to the outer sheet portion 26 in the stage before the thermal welding, thereby enabling the upper elastic members 15U to be accurately thermally welded to each other. Further, the upper elastic member 15U can be prevented from being broken by heat due to the welding position shift.

Embodiment 3 can also be implemented with appropriate modifications as follows.

The positions of the heat-welded adhesive portions 22X need not be at equal intervals as long as they avoid the extended positions of the upper elastic member 15U.

The plurality of spot-shaped adhesive portions 22X may be formed of a hot-melt adhesive without being thermally welded. Even in such a case, the amount of the 2 nd adhesive 25 used can be reduced as compared with the case of being filled with the adhesive. In the case of using the 2 nd adhesive 25, the adhesive portion 22X and the upper elastic member 15U may be overlapped. The 2 nd adhesive 25 constituting the partial pressure-sensitive adhesive portion 25X can be applied before and after the continuous pressure-sensitive adhesive step (see fig. 8 (e)).

space portions

30F and 30R may be continuous adhesive portions 25Y.

[ 4 th embodiment ]

As shown in fig. 9, in the diaper of embodiment 4, in the 2 nd adhesive region 22B, the upper end portion and the lower end portion of the communicating path 22Z constituting the waist opening 10A have the open ends 36, and air permeability can be improved. That is, the outer piece portion 26 is positioned on the outermost side, and the inner elastic portion 27 is configured by the upper elastic member 15U being sandwiched by the single piece 27A. Since the external sheet portion 26 and the sheet 27A are different sheets, the communicating path 22Z formed between the external sheet portion 26 and the sheet 27A has an open end 36 at the upper end and the lower end.

Next, a method for manufacturing a diaper according to embodiment 4 will be described. As shown in fig. 10(a), first, the outer sheet 26 is prepared. The outer sheet 26 prepared here includes an upper region corresponding portion 31 and a lower region corresponding portion 32. In the lower region corresponding portion 32, the lower elastic member 15D is disposed in an extended state. As shown in fig. 10(b), an adhesive 33 such as a hot melt adhesive is applied to the upper region corresponding portion 31 and the lower region corresponding portion 32, and the sheet 28A constituting the outer elastic portion 28 is bonded. Alternatively, the lower elastic member 15D to which the adhesive 33 is applied is disposed, and the sheet 28A is overlapped with the outer sheet portion 26. Thereby, the lower elastic member 15D is sandwiched between the outer piece portion 26 and the piece 28A, and the outer piece portion 26 constitutes the outer elastic portion 28 in the lower region corresponding portion 32. The sheet 28A has a size obtained by adding the upper region corresponding portion 31 and the lower region corresponding portion 32.

As shown in fig. 10(C), the 1 st adhesive region 22A of the upper region corresponding portion 31 and the 3 rd adhesive region 22C of the lower region corresponding portion 32 are coated with the 2 nd adhesive 25. As shown in fig. 10(d), the end region 16A of the absorbent main body 16 is placed on the 1 st adhesive region 22A and the 3 rd adhesive region 22C. Next, in the 2 nd adhesion region 22B, the hot melt adhesive as the 2 nd adhesive 25 is applied to the adjacent outer side of the end region 16A so as to have a recessed shape, thereby constituting a continuous adhesion portion 25Y (continuous adhesion step). The continuous adhesive portion 25Y may be provided when the 2 nd adhesive 25 is applied to the 1 st adhesive region 22A and the 3 rd adhesive region 22C.

Here, a single continuous piece 27A is prepared, which sandwiches the upper elastic member 15U. The sheet 27A has a size corresponding to the upper region corresponding portion 31 when folded in two, because it sandwiches the upper elastic member 15U. In the sheet 27A, the upper elastic member 15U is disposed in an extended state. The sheet 27A is folded in two after being coated with an adhesive such as a hot melt adhesive, and sandwiches the upper elastic member 15U. Alternatively, the sheet 27A is provided with the upper elastic member 15U coated with the adhesive, and folded in half to sandwich the upper elastic member 15U.

Thereby, the inner elastic portion 27 is constituted.

As shown in fig. 10(e), the inner elastic portion 27 overlaps the 2 nd adhesive region 22B of the outer panel portion 26 from above the end region 16A. The inner elastic portion 27 is temporarily fixed to the 2 nd bonded region 22B in the continuous bonded portion 25Y. As shown in fig. 10(f), the overlapped external sheet portion 26 and the inner elastic portion 27 are collectively sandwiched and heated at a predetermined pressure by the thermal head, thereby performing thermal fusion. Specifically, the double-folded sheet 27A and the outer sheet 26 are integrated by heat fusion. The heating portion of the thermal head is pressed and heated by being sandwiched between the upper elastic members 15U extending in the girth direction in accordance with the pattern of the adhesive portions 22X. The pressure-heated position is a position between the upper elastic members 15U extending in the girth direction. Thus, the outer side of the continuous bonded portion 25Y is integrated with the outer sheet portion 26 and the inner elastic portion 27 by the heat-welded partial bonded portion 25X. At this time, the upper elastic member 15U is not cut by heat (partial bonding step).

In the case of the diaper according to embodiment 4, the following effects can be obtained.

(4-1) the communication path 22Z is formed between the external piece portion 26 and the piece 27A by separating the external piece portion 26 and the piece 27A sandwiching the upper elastic member 15U forming the inner elastic portion 27. The upper end and the lower end of the communication path 22Z have open ends 36, and moisture in the diaper 10 is exhausted through the communication path 22Z. Although the upper end portions of the communicating paths 22Z in embodiments 1 to 3 described above are blocked by the sheet, the upper end portions of the communicating paths 22Z in embodiment 4 are not blocked by the sheet, and therefore the air permeability inside and outside the diaper is improved as compared with the cases of embodiments 1 to 3.

(4-2) the partial adhesive portion 25X provided outside the continuous adhesive portion 25Y is not constituted by a hot melt adhesive as the 2 nd adhesive 25 but constituted by hot melt. Therefore, the 2 nd adhesive 25 is used only in the continuous adhesive portion 25Y, and the amount of the 2 nd adhesive 25 used can be reduced as a whole.

(4-3) since the thermal fusion is performed between the upper elastic members 15U, the upper elastic members 15U can be prevented from being broken due to heat.

(4-4) the 2 nd adhesive 25 temporarily fixes the inner elastic portion 27 to the outer sheet portion 26 in the stage before the thermal welding, thereby enabling the upper elastic member 15U to be accurately thermally welded to each other. Further, the upper elastic member 15U can be prevented from being broken by heat due to the welding position deviation.

The above-described embodiment 4 can also be implemented with appropriate modifications as follows.

The continuous sheet 27A sandwiching the upper elastic member 15U may be formed of two sheets separated at the position of the waist opening 10A.

The plurality of spot-shaped adhesive portions 22X may be formed of a hot-melt adhesive without being thermally welded. Even in such a case, the amount of the 2 nd adhesive 25 used can be reduced as compared with the case of being filled with the adhesive. In the case of using the 2 nd adhesive 25, the adhesive portion 22X and the upper elastic member 15U may be overlapped.

space portions

30F and 30R may be continuous adhesive portions 25Y.

[ 5 th embodiment ]

Fig. 11 is a plan view of the diaper of embodiment 5 showing a modification of embodiment 1. Specifically, in the lower regions 12FD, 12RD in the diaper according to embodiment 1, the regions where the

inner sheet portions

29F, 29R of the outer

elastic portions

28F, 28R are bonded to the protective sheet 20 in the end region 16A are the 3 RD bonding regions 22C. The No. 3 bonding region 22C is also filled with the No. 2 bonding agent 25. In the 3 rd adhesion region 22C, the protective sheet 20 in the end region 16A is entirely adhered to the

inner sheet portions

29F and 29R by the 2 nd adhesive 25 (see fig. 3 (b)).

In contrast, in the diaper of embodiment 5, the 2 nd adhesive 25 is not applied to the end region 16A in the width direction, which is the girth direction, at the sheet side edge portion 18A. That is, the 2 nd adhesive 25 is not bonded to one or more portions of the 1 st elastic member 21E constituting the three-dimensional gather portion 21 on the sheet side edge portion 18A side and/or one or more portions of the 2 nd elastic member 23E constituting the leg gather portion 23 on the sheet side edge portion 18A side.

In the case of the diaper according to embodiment 5, the following effects can be obtained.

(5-1) the three-dimensional gather portion 21 and the leg gather portion 23 are not restricted to the outer

elastic portions

28F and 28R by the 2 nd adhesive 25, and therefore easily rise up with respect to the outer

elastic portions

28F and 28R.

(5-2) since the 2 nd adhesive 25 is not applied to the sheet side edge portion 18A, the amount of the 2 nd adhesive 25 used can be reduced accordingly.

The above-described embodiment 5 can also be implemented with appropriate modifications as follows.

The configuration in which the 2 nd adhesive 25 is not applied to the sheet-side edge portion 18A may be employed only for the front-side outer package 12F or only for the back-side outer package 12R.

[ 6 th embodiment ]

Fig. 12 is a diaper of embodiment 6, showing a modification of embodiment 1. Specifically, in embodiment 1, the

inner sheet portions

29F and 29R and the

outer sheet portions

26F and 26R extend in a state of being bonded to each other by the 1 st adhesive 24 in the upper regions 12FU and 12RU opposed to 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 side opposite to the skin.

In contrast, in embodiment 6, the

inner sheet portions

29F and 29R and the 1 st adhesive 24 are omitted in the upper regions 12FU and 12 RU. The outer

elastic portions

28F and 28R are configured by sandwiching the lower elastic members 15FD and 15RD between the

outer sheet portions

26F and 26R and the inner lower sheet portions 29F 'and 29R'.

In the case of the diaper according to embodiment 6, the following effects can be obtained.

(6-1) the

inner sheet portions

29F, 29R are omitted in the upper regions 12FU, 12RU, and the 1 st adhesive 24 is also omitted. This can reduce the number of sheets and adhesives used.

Embodiment 6 can also be implemented with appropriate modifications as follows.

In the upper regions 12FU and 12RU, the inner sheet portion is omitted, and accordingly, the configuration in which the 1 st adhesive is omitted may be adopted only for the ventral-side package 12F or し may be adopted only for the back-side package 12R.

[ 7 th embodiment ]

Fig. 13 is a diaper of embodiment 7, showing a modification of embodiment 1. Specifically, in the lower regions 12FD, 12RD, the

inner sheet portions

29F, 29R are omitted in the portions overlapping with the end regions 16A, and the

outer sheet portions

26F, 26R are directly bonded to the protective sheet 20 (portion B). In addition, the lower elastic members 15FD and 15RD are arranged in a non-stretched state, for example, in a cut state, as a portion B in the end region 16A. Alternatively, the lower elastic members 15FD, 15RD are not present. On the other hand, in the lower regions 12FD and 12RD on both sides of the end region 16A, the

inner sheet portions

29F and 29R extend to sandwich the lower elastic members 15FD and 15RD in the extended state (C portion).

In the case of the diaper according to embodiment 7, the following effects can be obtained.

(7-1) in the lower regions 12FD, 12RD, the

inner sheet portions

outer sheet portions

26F, 26R are directly adhered to the protective sheet 20(B portion). Therefore, the sheet and the adhesive used in the portion can be reduced.

The above-described embodiment 7 can also be implemented with appropriate modifications as follows.

The configurations shown in sections B and C may be employed only for the front-side outer package 12F or only for the back-side outer package 12R.

[ 8 th embodiment ]

Fig. 14 is a diaper of embodiment 8, showing a modification of embodiment 1. Specifically, the open ends of the

void portions

30F and 30R functioning as pockets for receiving excrement are located not at the lower ends of the upper regions 12FU and 12RU but at the lower ends of the lower regions 12FD and 12 RD. In the upper regions 12FU, 12RU on the skin side with respect to the end region 16A, the

outer sheet portions

26F, 26R and the

inner sheet portions

29F, 29R sandwich the upper elastic members 15FU, 15 RU. In contrast, in the lower regions 12FD, 12RD, there are no elastic members constituting the waist gather portion and the abdomen gather portion. That is, the

outer sheet portions

26F and 26R and the

inner sheet portions

29F and 29R do not sandwich the elastic members constituting the waist gather portion and the abdomen gather portion in the lower regions 12FD and 12 RD.

As the upper regions 12FU, 12RU and the lower regions 12FD, 12RD, and the outer side of the end region 16A on the side opposite to the skin may be omitted from the

inner sheets

29F, 29R and the 1 st adhesive 24 as in embodiment 6 (see fig. 12). Outer

elastic portions

28F and 28R are configured by

outer sheet portions

26F and 26R,

inner sheet portions

29F and 29R configuring

space portions

30F and 30R, and end regions 16A sandwiching lower elastic members 15FD and 15 RD. As in embodiment 6 (see fig. 12), the outer

elastic portions

28F and 28R may be configured such that the

outer sheet portions

26F and 26R and the inner lower sheet portions 29F 'and 29R' sandwich the lower elastic members 15FD and 15 RD.

In the case of the diaper according to embodiment 8, the following effects can be obtained.

(8-1) when the diaper is removed from the wearer, the joint 11 is torn from the upper end toward the lower end, or from the lower end toward the upper end.

Outer sheet portions

26F, 26R and

inner sheet portions

29F, 29R extend over upper regions 12FU, 12RU and lower regions 12FD, 12RD on the inner side that is the skin side and the outer side that is the opposite side with respect to end region 16A. Therefore, the engaging portion 11 is similarly engaged by four pieces from the upper end to the lower end. Therefore, when the joint 11 is torn up or down, the tearing can be prevented from being performed halfway in the girth direction from the part of the joint 11.

(8-2) the opening ends of

space portions

30F, 30R functioning as pockets are located at the lower ends of lower regions 12FD, 12 RD. Therefore, the capacity of

space portions

30F and 30R can be increased.

(8-3) there are no elastic members constituting the waist gather portion and the abdomen gather portion in the lower regions 12FD, 12RD on the inner side with respect to the end region 16A. Therefore, the end regions 16A can be prevented from shrinking in the girth direction and forming wrinkles.

The above-described embodiment 8 can also be implemented with appropriate modifications as follows.

The opening ends of the

void portions

30F and 30R functioning as pockets may be located at any position above the lower ends of the upper regions 12FU and 12RU as long as they are located below the lower ends of the upper regions 12FU and 12 RU.

A configuration in which the opening ends of

space portions

30F, 30R are aligned with the lower ends of lower regions 12FD, 12RD may be employed only for ventral outer body 12F or only for dorsal outer body 12R. The configuration in which the opening ends of

space portions

30F, 30R are located below the lower ends of upper regions 12FU, 12RU and above the lower ends of lower regions 12FD, 12RD (i.e., the configuration in which the opening ends of

space portions

30F, 30R are located between the lower ends of upper regions 12FU, 12RU and the lower ends of lower regions 12FD, 12 RD) may be employed only for ventral armor 12F or only for dorsal armor 12R.

The above embodiment can be modified and implemented as follows.

The upper regions 12FU, 12RU and the lower regions 12FD, 12RD may not be connected by the outer sheet portion 26. That is, the upper regions 12FU, 12RU and the lower regions 12FD, 12RD may also be separated. The outer sheet portion 26 may be provided at a position facing at least the inner elastic portion 27, and may be appropriately modified according to the configuration of the diaper.

The region where the upper elastic member 15U located on the inner side with respect to the absorbent main body 16 is disposed and the region where the lower elastic member 15D located on the outer side are disposed may overlap. The lower end of the region in which the upper elastic member 15U is disposed and the upper end of the region in which the lower elastic member 15D is disposed may be located at the same position in the boundary portion.

Any one of the front side outer package 12F and the back side outer package 12R may be provided with the upper regions 12FU, 12RU and the lower regions 12FD, 12 RD. In addition, the lower regions 12FD and 12RD (outer elastic portions 28) may be omitted from both the front-side outer body 12F and the back-side outer body 12R.

Space portion 30 is preferably provided in both of front-side exterior body 12F and back-side exterior body 12R, but may be provided in at least one of them.

The disposable diaper may be a loop type diaper.

Disposable diapers for infants and adults such as the elderly and the handicapped who need nursing care may be used. In addition, the product can be used for pets.

The outer sheet portion 26, the sheet constituting the inner elastic portion 27, and the sheet constituting the outer elastic portion 28 constituting the outer package 12 may be liquid impermeable or liquid permeable.

Description of the reference numerals

10A: waist opening, 10C: lower crotch portion, 10F: front body, 10L: leg hole opening, 10R: back piece, 10W: waistline unit, 11: joint, 12 FD: ventral inferior region, 12 FU: ventral upper region, 12R: backside outer package, 12 RD: backside lower area, 12 RU: backside upper region, 15D: lower elastic member, 15 FD: ventral lower elastic member, 15 FU: ventral upper elastic member, 15 RD: dorsal lower elastic member, 15RD 1: backside lower elastic member, 15U: upper elastic member, 15 RU: backside upper elastic member, 16: absorbent body, 16A: end region, 17: back sheet, 18: absorber, 18A: sheet side edge portion, 18B: peripheral portion, 18F: ventral end, 18R: back-side end, 19: dough sheet, 20: protective sheet, 21: three-dimensional tightening part, 21E: 1 st elastic member, 21S: side sheet, 22A: 1 st adhesive region, 22B: no. 2 bonding region, 22C: no. 3 adhesive region, 22X: bonding portion, 22Y: non-adhesive portion, 22Z: communication path, 23: leg gather, 23E: 2 nd elastic member, 24: adhesive 1, 25: adhesive 2, 25A: adhesive, 25X: partial adhesive portion, 25Y: continuous bonding portion, 26: outer sheet portion, 26F: ventral outer sheet, 26R: backside outer sheet, 27: inner elastic portion, 27A: sheet, 27F: ventral medial elastic portion, 27R: back-side inner elastic portion, 28: outer elastic portion, 28A: sheet, 28F: ventral lateral elastic portion, 28R: backside outer elastic portion, 29: inner sheet, 29F: ventral inner sheet, 29R: backside inner sheet, 30F: ventral space, 30R: backside space portion, 31: upper region equivalent portion, 31A: upper 1 st region, 31B: upper 2 nd region, 32: lower region equivalent, 33: adhesive, 34: margin portion, 36: an open end.

Claims

1. A disposable diaper is provided with:

a 1 st outer package which constitutes a front body panel;

a 2 nd exterior body constituting a rear body panel; and

an absorbent main body having end regions overlapping with the 1 st outer cover and the 2 nd outer cover at both ends in a front-rear direction, and a crotch portion formed between the 1 st outer cover and the 2 nd outer cover,

at least one of the 1 st package and the 2 nd package includes:

an inner elastic section including an elastic member extending and contracting in a girth direction, the inner elastic section being configured by sandwiching the elastic member by a sheet, and being located on an inner side of the absorbent main body, the inner side being a side closer to a wearer's skin;

a sheet portion including one or both of an outer sheet portion and an inner sheet portion, the outer sheet portion being located on an outer side of the absorbent main body on a side opposite to the skin and facing at least the inner elastic portion, and the inner sheet portion being located at a position facing at least the inner elastic portion at a position between the position of the outer sheet portion and the absorbent main body; and

and a partial adhesive portion partially adhering the panel portion and the inner elastic portion on both sides of the end region in the waist circumferential direction.

2. The disposable diaper according to claim 1, wherein the partial adhesive part has an adhesive part at a certain interval.

3. The disposable diaper according to claim 1 or 2,

the inner elastic portion is not bonded to the end region,

the disposable diaper further includes a continuous adhesive portion that continuously adheres the sheet portion and the inner elastic portion so that an open end of the end region faces the crotch portion, in a peripheral portion adjacent to the end region,

the partial adhesive portion is provided outside the continuous adhesive portion.

4. The disposable diaper according to claim 1 or 2,

the partial adhesive portions are composed of adhesive portions and non-adhesive portions extending in the front-back direction and alternately arranged in the girth direction.

5. The disposable diaper according to claim 1 or 2,

the partial bonding portion is constituted by a plurality of bonding portions having a dotted shape and non-bonding portions other than the bonding portions.

6. The disposable diaper according to claim 5,

the non-adhesive portion includes a region extending in the girth direction and coinciding with an extending position of the elastic member,

the partial adhesive portion adheres one or both of the outer sheet portion and the inner sheet portion to the inner elastic portion by heat welding in the adhesive portion.

7. The disposable diaper according to any one of claims 1 to 5,

the partial adhesive portion bonds the inner elastic portion and one of the outer sheet portion and the inner sheet portion to each other with a hot melt adhesive.

8. The disposable diaper according to any one of claims 1 to 7,

at least one of the 1 st outer package and the 2 nd outer package includes an upper region and a lower region located closer to a crotch side than the upper region,

the upper region is provided with the inner elastic part,

the lower region includes a lower elastic member extending and contracting in the girth direction, and an outer elastic portion configured by sandwiching the lower elastic member with a sheet, the outer elastic portion being located outside the absorbent main body.

9. The disposable diaper according to any one of claims 1 to 8,

in the partial bonded portion, a communication path is provided between the sheet portion and the inner elastic portion, the communication path communicating an upper end portion of a waist opening with a lower end portion of the inner elastic portion on a side opposite to the upper end portion, the waist opening being formed by joining both end portions in the waist circumferential direction of the 1 st exterior body and the 2 nd exterior body.

10. A method for manufacturing a disposable diaper, the disposable diaper comprising:

a 1 st outer package which constitutes a front body panel;

a 2 nd exterior body constituting a rear body panel; and

at least one of the 1 st package and the 2 nd package includes:

an inner elastic section including an elastic member extending and contracting in a girth direction, the inner elastic section being configured by sandwiching the elastic member by a sheet, the inner elastic section being located on an inner side of the absorbent main body, the inner side being a side closer to a skin of a wearer; and

a sheet portion including either one or both of an outer sheet portion and an inner sheet portion, the outer sheet portion being positioned outside the absorbent main body on a side opposite to the skin and facing at least the inner elastic portion, the inner sheet portion being positioned between the outer sheet portion and the absorbent main body and facing at least the inner elastic portion,

the manufacturing method comprises a part of the bonding process,

in the partial bonding step, the panel section and the inner elastic section are partially bonded on both sides of the end region in the waist circumferential direction.

11. The method for manufacturing a disposable diaper according to claim 10,

in the partial bonding step, the bonding portions are provided at regular intervals.

12. The method for manufacturing a disposable diaper according to claim 10 or 11,

further comprising a continuous bonding step of continuously bonding the sheet portion and the inner elastic portion at a peripheral portion adjacent to the end region so that an open end of the end region faces the crotch portion.

13. The method for manufacturing a disposable diaper according to claim 10 or 11,

in the partial bonding step, the panel sections and the inner elastic sections are bonded so that bonded sections and unbonded sections extend in the front-back direction and are alternately arranged in the waist-circumferential direction.

14. The method for manufacturing a disposable diaper according to claim 10 or 11,

in the partial bonding step, the sheet portion and the inner elastic portion are bonded so as to provide a plurality of bonded portions having a dotted shape and unbonded portions other than the bonded portions.

15. The method for manufacturing a disposable diaper according to claim 14,

in the partial bonding step, one or both of the outer sheet portion and the inner sheet portion are bonded to the inner elastic portion by thermal welding so as to provide a plurality of bonded portions having a spot shape and unbonded portions other than the bonded portions,

the non-adhesive portion extends in the girth direction and coincides with an extending position of the elastic member.

16. The method for manufacturing a disposable diaper according to any one of claims 10 to 14,

in the partial bonding step, the inner elastic portion and one of the outer sheet portion and the inner sheet portion are bonded to each other with a hot melt adhesive.

17. The method for manufacturing a disposable diaper according to any one of claims 10 to 16,

the upper region is provided with the inner elastic part,

the lower region includes a lower elastic member extending and contracting in the girth direction, and an outer elastic portion configured by sandwiching the lower elastic member with a sheet, the outer elastic portion being located outside the absorbent main body,

the manufacturing method further includes:

a step of forming the outer elastic portion by sandwiching the lower elastic member by a sheet in the lower region; and

and a step of arranging and bonding the end regions across the outer elastic portion and the sheet portion.