JP6933127B2 - Disposable diapers - Google Patents

Description

The present invention relates to disposable diapers with three-dimensional gathers and leg gathers.

As shown in Patent Document 1, a disposable diaper as an absorbent article includes a first exterior body constituting the front body, a second exterior body constituting the rear body, and a front end portion joined to the first exterior body. It includes an absorbent body that includes a rear end that is joined to the second exterior. In the first exterior body and the second exterior body, the absorbent main body is bent in two, and both ends of the first and second exterior bodies in the waist circumference direction are joined to each other, so that the waist circumference is attached to the upper end portion. A portion is formed, and an opening around the leg is formed at the lower end. In the first exterior body and the second exterior body, elastic members such as rubber threads are arranged around the waistline along the body circumference direction. Further, the absorbent main body is an inner surface that comes into contact with the skin of the absorbent main body, and three-dimensional gathers are arranged at both ends along the front-rear direction. Further, the absorbent main body is provided with leg gathers formed by sandwiching an elastic member extending in the front-rear direction between sheets at both side edges along the front-rear direction. The leg gathers are located in the leg-circumferential openings when worn. Leg gathers and three-dimensional gathers are constructed by sandwiching an elastic member such as rubber thread between sheets.

Japanese Patent No. 4996508

By the way, in disposable diapers, excrement may flow into the groove between the three-dimensional gathers and the leg gathers. If the wearer changes his / her posture while the excrement has flowed into the groove between the three-dimensional gathers and the leg gathers, a gap is created around the legs, which causes the excrement to leak from around the legs.

An object of the present invention is to provide a disposable diaper capable of suppressing leakage from around the legs.

Disposable diapers for solving the above problems include a first exterior body that constitutes the front view, a second exterior body that constitutes the back body, and an end in the front-rear direction that overlaps the first exterior body and the second exterior body. An absorbent body having a portion region and a crotch portion located between the first exterior body and the second exterior body, and the crotch lower portion located in at least one of the end regions of the absorbent body. A three-dimensional gather provided on the inner surface of the absorbent body and along each side edge along the front-rear direction, and the three-dimensional gathers are provided in the front-rear direction. The three-dimensional gather having the extending first elastic member and the first sheet sandwiching the first elastic member, and the leg gathers provided on each side edge portion of the absorbent body along the front-rear direction, and the respective leg gathers. Provided the leg gather having a second elastic member extending in the front-rear direction and a second sheet sandwiching the second elastic member, and inside the pocket, the three-dimensional gather and the end of the leg gather in the front-rear direction. The portion is located, and the first sheet is provided with a liquid permeable portion at least in the lower part of the crotch.

According to the above configuration, the excrement flows toward the pocket and is stored until it is absorbed by the absorber. When the wearer changes posture, the excrement flows to the left-right corners of the pocket, from which it flows into the groove between the three-dimensional gathers and the leg gathers. The excrement that has flowed into the groove passes through the liquid-permeable portion of the first sheet that constitutes the three-dimensional gather, returns to the inside of the absorbent body (in the direction of the center line), and is absorbed by the absorbent body. Therefore, it is possible to prevent lateral leakage from around the legs.

In the disposable diaper, the three-dimensional gather includes a base end portion to which the first sheet sandwiching the first elastic member is adhered to the absorbent body, and the base end portion overlaps with the leg gather. May be.
According to the above configuration, the structure of the three-dimensional gather and the adhesive position with respect to the absorbent body are the same as those of the existing diaper, so that it is not necessary to change the manufacturing equipment. Therefore, it can be easily manufactured.

In the disposable diaper, in a state where the three-dimensional gather stands up with respect to the absorbent body, the liquid-permeable portion is liquid-impermeable from the center line in the left-right direction to the outside in the left-right direction of the absorbent body. It may be configured to be permeable and liquid permeable from the outside toward the center line.
According to the above configuration, the side sheet is liquid-impermeable from the center line in the left-right direction to the outside, and is liquid-permeable from the outside toward the center line. It is possible to prevent the excrement existing in the region inside the gather from flowing to the outside of the three-dimensional gather, that is, the groove side.

In the disposable diaper, the absorbent body includes a top sheet in contact with the skin, a back sheet on the opposite side of the skin, and an absorbent body located between the top sheet and the back sheet. A plurality of second elastic members are provided, and the second elastic member located on the outermost side in the left-right direction of the absorbent body is located outside the back sheet in the left-right direction of the absorbent body. It may be configured as a diaper.
According to the above configuration, in the portion where the back sheet does not exist, the flexibility is increased and the leg gathers can easily stand up because the back sheet does not exist.

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 constituting a waist circumference portion of the disposable diaper, and the upper region is the said. The lower region comprises an inner elastic portion located inside the end region, the lower region comprises an outer elastic portion located outside the end region, and the inner elastic portion overlaps the end region. It is non-adhesive in the region, is adhered to the sheet portion located outside the end region around the end region, and is between the inner elastic portion and the end region. , The pocket may be configured.
According to the above configuration, a pocket can be formed between the inner elastic portion and the end region.

According to the present invention, it is possible to provide a disposable diaper capable of suppressing leakage from around the legs.

FIG. 3 is a perspective view of a pants-type disposable diaper according to a first embodiment embodying the absorbent body of the present invention. (A) is a plan view showing a developed state of the pants-type disposable diaper of FIG. 1, and (b) is a cross-sectional view taken along line 2B-2B of (a). (A) is a plan view showing the adhesive region of the upper region of the diaper of FIG. 1 corresponding to FIG. 2 (a), and FIG. 2 (b) shows the adhesive region of the lower region of the diaper of FIG. 1 (a). The plan view which shows corresponding to. FIG. 3 is a cross-sectional view of a main part in a state where the diaper of FIG. 1 is attached. (A) is a cross-sectional view taken along line 5-5 of FIG. 2 (a), and (b) is taken along line 5-5 of FIG. Sectional view. The plan view which shows the flow direction of excrement in the unfolded state of the pants-type disposable diaper of FIG.

A pants-type disposable diaper according to an embodiment embodying the disposable diaper of the present invention will be described with reference to FIGS. 1 to 6.
As shown in FIG. 1, the pants-type disposable diaper 10 (hereinafter, simply referred to as “diaper 10”) has a front body 10F having a shape that follows the shape of the abdomen of the human body and a shape that follows the shape of the back of the human body. The back body 10R and the inseam 10C connecting the front body 10F and the back body 10R are provided.

The portion of the front body 10F opposite to the inseam 10C constitutes a waist circumference portion 10W that surrounds the waist circumference portion of the human body, and has a waist circumference opening 10A at the upper end. Further, the left and right ends on the front body 10F, the left and right ends on the back body 10R, and the left and right ends on the inseam 10C form a pair of left and right leg-circumferential openings 10L having a shape surrounding the thighs of the human body. ing. Further, the left and right ends of the front body 10F and the rear body 10R in the waist direction are joints 11.

FIG. 2A is a plan view showing an unfolded state of a pants-type disposable diaper, and FIG. 2B is a cross-sectional view taken along line 2B-2B of FIG. 2A. In FIG. 2B, the right side is the skin side of the diaper wearer, that is, the side closer to the wearer's skin.

The waist circumference 10W on the front body 10F is composed of the ventral exterior body 12F as the ventral first exterior body, and the waist circumference 10W on the back body 10R is the dorsal exterior as the dorsal second exterior body. It is composed of body 12R.

The ventral exterior body 12F and the dorsal exterior body 12R have a rectangular shape with the left-right direction X, which is the waist circumference direction, as the longitudinal direction. The sheet constituting the exterior body is, for example, a non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin, and is either a liquid-permeable sheet or a liquid-impermeable sheet. You may. The ventral exterior body 12F is configured such that the ventral upper elastic member 15FU and the ventral lower elastic member 15FD are sandwiched between the sheets constituting the ventral exterior body 12F. The dorsal exterior body 12R is also configured such that the dorsal upper elastic member 15RU and the dorsal lower elastic member 15RD are sandwiched between the seats constituting the dorsal 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 shape or a string shape. A plurality of elastic members 15FU, 15FD, 15RU, and 15RD are arranged in parallel with each other along the left-right direction X.

The ventral exterior body 12F and the dorsal exterior body 12R are connected by an absorbent main body 16 constituting the inseam 10C. The absorbent main body 16 has a rectangular shape with the front-rear direction Y as the longitudinal direction. As shown in FIG. 2B, the absorbent main body 16 has a liquid-impermeable back sheet 17, an absorber 18, a liquid-permeable top sheet 19, and a back sheet 17. It includes a cover sheet 20 that can be stacked on the outside. In the diaper 10, the top sheet 19 is arranged inside in contact with the wearer's skin, the back sheet 17 is arranged outside with respect to the absorber 18, and the cover sheet 20 covers the back sheet 17. 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 polyethylene resin having liquid impermeable property. The back sheet 17 is formed with a large number of micropores in order to ensure air permeability. The material forming the top sheet 19 and the cover sheet 20 is, for example, one or more materials selected from woven fabrics, non-woven fabrics, porous films and the like. Further, as the top sheet 19, for example, a liquid-permeable non-woven fabric composed of fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and which has been subjected to a hydrophilization treatment is used. .. Since the cover sheet 20 is the outermost sheet and is a sheet that touches the user, it is made of a non-woven fabric or the like that improves the feel of the touch.

The absorber 18 has an elongated band shape so as to straddle the front body 10F, the inseam 10C, and the back body 10R. The absorber 18 is composed of a molded body made of an absorbent material and a core wrap that wraps the molded body. The molded product of the absorbent material forming the absorbent body 18 is a molded product of an absorbent material such as fluff pulp, a highly absorbent polymer, or a hydrophilic sheet. The core wrap is made of tissue, non-woven fabric, or the like. Then, the absorber 18 is arranged and joined between the back sheet 17 and the top sheet 19. The absorber 18 extends between the ventral exterior 12F and the dorsal exterior 12R and includes a ventral end 18F and a dorsal end 18R. The ventral end 18F extends to the ventral upper region 12FU, and the dorsal end 18R extends to the dorsal upper region 12RU. Further, the absorber 18 extends between the base end portion 21B of the three-dimensional gather 21 and the leg gather 23 in the left-right direction X. 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 one size larger than the absorber 18, and the absorbent body 16 has a central region in which the absorber 18 is arranged and a central region. The absorber 18 is not arranged and includes the peripheral portion 18B. The side edge portions of the absorbent body 16 extending in the front-rear direction Y are the seat side edge portions 18A on which the absorber 18 is not arranged. As an example, the seat side edge portion 18A is formed by overlapping a back sheet 17, a top sheet 19, and a cover sheet 20. Further, the seat side edge portion 18A is configured, for example, by folding back both side edge portions extending in the front-rear direction Y of the cover sheet 20 inward in the direction of the center line P in the left-right direction X. Further, the inner surface and the outer surface of the region overlapping the exterior bodies 12F and 12R in the front-rear direction Y of the absorbent main body 16 are end regions 16A to which the sheets constituting the exterior body are adhered.

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 the absorbent body 16, that is, the top sheet 19 It is arranged on the side and constitutes a part of the waist circumference opening 10A and the waist circumference 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 arranged outside the absorbent main body 16, that is, on the back sheet 17 and the cover sheet 20 side. , Consists of a part of the waist circumference 10W.

In the ventral upper region 12FU, a plurality of ventral upper elastic members 15FU are arranged in the longitudinal direction in the waist direction (between the ventral outer seat portion 26F and the ventral inner seat portion 25F) in the left-right direction X. It is arranged in an extended state over the left and right ends. In the dorsal upper region 12RU, a plurality of dorsal upper elastic members 15RU are arranged in the left-right direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) with the left-right direction X as the longitudinal direction. It is arranged in a state of being extended over the left and right ends of X.

Further, in the ventral lower region 12FD, a plurality of ventral lower elastic members 15FD are arranged in the left-right direction between the seats (between the ventral outer seat portion 26F and the ventral inner seat portion 25F) with the left-right direction X as the longitudinal direction. It is arranged over the left and right ends of X. In the dorsal lower region 12RD, a plurality of dorsal lower elastic members 15RD are arranged in the left-right direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) with the left-right direction X as the longitudinal direction. It is arranged over the left and right ends of X. These elastic members 15FU, 15FD, 15RU, and 15RD form waist gathers and tammy gathers at the waist circumference portion 10W, and suppress the occurrence of abdominal leakage and back leakage.

As shown in FIG. 2B, 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 body 16. As shown in FIG. 2A, the ventral lower elastic member 15FD is arranged on the end region 16A in a non-extended state, for example, a cut state. Further, most of the lower dorsal elastic members 15RD are arranged on the end region 16A in a non-extended state, for example, a cut state. As a result, the absorbent main body 16 suppresses the absorbent main body 16 from contracting in accordance with the contraction of the ventral lower elastic member 15FD and the dorsal lower elastic member 15RD, and forming folds on the absorbent main body 16. Can be done. Then, it is possible to suppress the formation of a gap between the absorbent main body 16 and the skin, and it is possible to suppress abdominal leakage and back leakage.

Among the plurality of dorsal lower elastic members 15RD, the plurality of dorsal lower elastic members 15RD1 located along the lower end of the dorsal upper region 12RU near the dorsal upper region 12RU are the dorsal side of the absorber 18. It is arranged on the end 18R in an extended state, that is, in an uncut state. Therefore, in the region where the dorsal lower elastic member 15RD1 is arranged, the fold 16B can be formed on the dorsal end 18R. At the dorsal end 18R where the folds 16B are formed, the thickness of the absorber 18 is thicker than in the region where the folds 16B are not formed, and the open end of the dorsal pocket 30R, which will be described later, is pushed by the buttocks and is difficult to close. Become. Further, the fold 16B can function as a guide to guide the dorsal pocket 30R.

As shown in FIG. 2B, the ventral upper region 12FU constitutes the ventral medial elastic portion 27F by sandwiching the ventral upper elastic member 15FU between the sheets (ventral outer seat portion 26F and ventral inner seat portion 25F). doing. Further, the ventral lower region 12FD also constitutes the ventral outer elastic portion 28F by sandwiching the ventral lower elastic member 15FD between the sheets (ventral outer seat portion 26F and ventral inner seat portion 25F). The ventral upper region 12FU and the ventral lower region 12FD are connected in a series by the ventral outer seat portion 26F and the ventral inner seat portion 25F.

The dorsal upper region 12RU constitutes a dorsal inner elastic portion 27R by sandwiching the dorsal upper elastic member 15RU between seats (dorsal outer seat portion 26R and dorsal inner seat portion 25R). Further, the dorsal lower region 12RD also constitutes the dorsal outer elastic portion 28R by sandwiching the dorsal lower elastic member 15RD between the seats (the dorsal outer seat portion 26R and the dorsal inner seat portion 25R). The dorsal upper region 12RU and the dorsal lower region 12RD are connected in a series by the dorsal outer seat portion 26R and the dorsal inner seat portion 25R.

The ventral outer seat portion 26F and the dorsal outer seat portion 26R are located on the outermost side opposite to the skin, and are bent inward at the waist circumference opening 10A and are located on the skin side. .. The ventral inner seat portion 25F and the dorsal inner seat portion 25R are seats facing the ventral outer seat portion 26F and the dorsal outer seat portion 26R.

The ventral outer seat portion 26F and the ventral inner seat portion 25F constituting the ventral medial elastic portion 27F sandwich the ventral upper elastic member 15FU and the ventral lower elastic member 15FD, and are adhered with the first adhesive 24. ing. The folded portion of the ventral outer seat portion 26F and the ventral inner seat portion 25F constitutes the waist circumference opening 10A, and the waist circumference opening 10A is formed by stacking two sheets to increase the strength ( See Part A in FIG. 2 (b)).

The dorsal outer seat portion 26R and the dorsal inner seat portion 25R constituting the dorsal inner elastic portion 27R sandwich the dorsal upper elastic member 15RU and the dorsal lower elastic member 15RD and adhere to each other with the first adhesive 24. Has been done. The folded portion of the dorsal outer seat portion 26R and the dorsal inner seat portion 25R constitutes a waist circumference opening 10A, and the waist circumference opening 10A is formed by stacking two sheets to increase the strength (FIG. FIG. 2 (b) Refer to Part A in the middle).

In the ventral medial elastic portion 27F and the dorsal medial elastic portion 27R, the ventral inner seat portion 25F and the dorsal inner seat portion 25R are not adhered to the top sheet 19 of the end region 16A. Further, in the ventral medial elastic portion 27F and the dorsal medial elastic portion 27R, in the region around the end region 16A, the ventral inner sheet portions 25F folded back at the waist circumference opening 10A are joined by the second adhesive 25. Be glued. Further, the cover sheet 20 of the end region 16A is also adhered to the ventral inner sheet portion 25F by the second adhesive 25.

Here, FIG. 3A is a plan view showing the adhesive region of the upper region corresponding to FIG. 2A, and FIG. 3B corresponds to the adhesive region of the lower region corresponding to FIG. 2A. It is a plan view which shows. As shown in FIGS. 2B and 3A, in the ventral upper region 12FU, the cover sheet 20 of the end region 16A is adhered to the ventral inner sheet portion 25F by the second adhesive 25. The region becomes the first adhesive region 22A. Further, in the dorsal upper region 12RU, the region where the cover sheet 20 of the end region 16A is adhered to the dorsal inner sheet portion 25R by the second adhesive 25 is the first adhesive region 22A.

Further, in the ventral medial elastic portion 27F in the ventral upper region 12FU, the ventral inner sheet portions 25F around the first adhesive region 22A and folded back at the waist circumference opening 10A are joined by the second adhesive 25. The region to be bonded is the second bonding region 22B. Further, in the dorsal inner elastic portion 27R in the dorsal upper region 12RU, the region where the dorsal inner sheet portions 25R folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25 is the second adhesive region 22B. It becomes. The second adhesive region 22B in the ventral medial elastic portion 27F and the dorsal medial elastic portion 27R is located around the end region 16A and has a concave shape facing the inseam 10C. In the concave inner portion, the ventral medial elastic portion 27F and the dorsal medial elastic portion 27R are non-adhesive portions that are not adhered to the top sheet 19 of the end region 16A. As a result, a ventral pocket 30F is formed between the ventral inner seat portion 25F of the ventral medial elastic portion 27F and the top sheet 19 of the end region 16A. Further, a dorsal pocket 30R is formed between the dorsal inner seat portion 25R of the dorsal inner elastic portion 27R and the top sheet 19 of the end region 16A.

These pockets 30F and 30R have an open end on the crotch portion 10C side and are configured to accommodate excrement such as urine and feces that move in the direction of the abdomen and back. Further, the second adhesive region 22B is provided with a margin 34 having a predetermined width between the waist circumference opening 10A and the tip end portion of the end region 16A in the front-rear direction Y, and excretion housed in the pockets 30F and 30R. It prevents an object from leaking toward the opening 10A around the waist.

Further, as shown in FIG. 3B, in the ventral lower region 12FD and the dorsal lower region 12RD, the ventral inner seat portion 25F and the dorsal inner seat of the ventral lateral elastic portion 28F and the dorsal lateral elastic portion 28R. The region where the portion 25R is adhered to the back sheet 17 of the end region 16A is the third adhesion region 22C.

Here, the sizes of the ventral pocket 30F and the dorsal pocket 30R will be described. As shown in FIG. 4, for example, in the body shape of an infant, the abdomen 36 side has a recessed portion 37 in the crotch portion, and the back 38 side has a buttock portion 39 protruding. Therefore, the open end of the ventral pocket 30F is likely to be in an open state due to the recessed crotch portion, and excrement is also likely to flow into the ventral pocket 30F. In addition, a large amount of liquid such as urine tends to flow into the ventral pocket 30F, and if it is too small, it causes abdominal leakage. Therefore, the ventral pocket 30F is made larger and deeper than the dorsal pocket 30R to secure a sufficient volume for accommodating excrement such as urine and suppress the occurrence of abdominal leakage. Then, when the diaper 10 is discarded, the ventral pocket 30F is accommodated in a state in which a portion other than the ventral pocket 30F is rolled up.

Further, since the dorsal pocket 30R is smaller and shallower than the ventral pocket 30F, the buttock 39 makes it difficult for the open end of the dorsal pocket 30R to be closed.

The ventral end 18F of the absorber 18 extends close to the innermost part of the ventral pocket 30F, so that the excrement that has flowed into the ventral pocket 30F can be absorbed. The dorsal end 18R of the absorber 18 extends close to the innermost part of the dorsal pocket 30R, so that the excrement flowing into the dorsal pocket 30R can be absorbed.

In the diaper 10 as described above, the ventral outer seat portion 26F and the ventral inner seat portion 25F are provided so as to straddle the ventral upper region 12FU and the ventral lower region 12FD. The dorsal outer seat portion 26R and the dorsal inner seat portion 25R are also provided so as to straddle the dorsal upper region 12RU and the dorsal lower region 12RD. The ventral outer seat portion 26F and the ventral inner seat portion 25F and the dorsal outer seat portion 26R and the dorsal inner seat portion 25R are joined at the joint portion 11. As a result, even when wearing the diaper 10, it is possible to prevent the legs from entering the gap between the upper region and the lower region, making it difficult to wear the diaper 10.

Further, as shown in FIG. 5A, three-dimensional gathers 21 are arranged at both ends along the front-rear direction Y on the inner surface of the absorbent main body 16, that is, on the top sheet 19. Each three-dimensional gather 21 includes a first elastic member 21E extending in the front-rear direction Y of the absorbent body 16 and a side sheet 21S as a first sheet for sandwiching the first elastic member 21E. The first elastic member 21E is arranged with respect to the side sheet 21S in a state where a plurality of members are parallel to each other and in a state where a 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 composed of a sheet similar to the top sheet 19 and the cover sheet 20, and is composed of, for example, a long sheet body extending in the front-rear direction Y including a non-woven fabric having liquid permeability and the like. As an example, the side sheet 21S is formed by subjecting a hydrophobic sheet to a hydrophilic treatment. It may also be formed of hydrophilic fibers. The entire three-dimensional gather 21 composed of the side sheet 21S constitutes a liquid permeable portion.

The side seat 21S has a length straddling the ventral upper region 12FU, the inseam 10C, and the dorsal upper region 12RU in the anteroposterior direction Y. Therefore, each end of the side seat 21S in the front-rear direction Y is located inside the ventral pocket 30F and the dorsal pocket 30R. Specifically, it is an inner edge portion extending in the front-rear direction Y of the ventral pocket 30F and the dorsal pocket 30R, and is located at the innermost part of the ventral pocket 30F and the dorsal pocket 30R. The first elastic member 21E is shorter than the length of the side seat 21S in the front-rear direction Y, and has a length straddling the ventral lower region 12FD, the crotch lower region 10C, and the dorsal lower region 12RD (FIG. 2 (FIG. 2). a) See).

As shown in FIG. 5A, the side sheet 21S sandwiches the first elastic member 21E in a state of being folded in half. Each end of the folded and overlapped side sheets 21S, that is, the base end 21B of the three-dimensional gather 21, is fixed to the sheet side edge 18A of the absorbent body 16 with an adhesive such as a hot melt adhesive. The side sheet 21S sandwiching the first elastic member 21E includes a base end portion 21B and a tip end portion 21P on the opposite side to the base end portion 21B. Further, the side sheet 21S is folded back so that the edge portion of the base end portion 21B near the center line P is the folded-back portion 21T, and the folded-back portion 21T to the tip portion 21P face both ends of the absorbent main body 16 in the left-right direction X. It has been. The side sheet 21S sandwiching the first elastic member 21E has a non-adhesive portion from the tip portion 21P to the folded portion 21T so that the three-dimensional gather 21 can stand up. When the three-dimensional gather 21 is attached to the wearer, the three-dimensional gather 21 stands up in the skin contact direction with respect to the absorbent main body 16 due to the contraction force of the first elastic member 21E.

In the ventral upper region 12FU and the dorsal upper region 12RU inside the ventral pocket 30F and the dorsal pocket 30R, the first elastic member 21E does not exist, and the side sheet 21S from the tip portion 21P to the folded portion 21T. The entire region of the above is fixed to the base end portion 21B and the sheet side edge portion 18A by adhesive or heat welding to form a sealing portion 21C (see FIG. 2A).

Further, the seat side edge portion 18A of the absorbent main body 16 is configured by folding both side edge portions of the cover sheet 20 along the front-rear direction Y toward the center side. The folded seat side edge 18A includes a leg gather 23. The leg gather 23 is configured by sandwiching a second elastic member 23E extending in the front-rear direction Y of the absorbent body 16 at the seat side edge portion 18A. Each edge of the cover sheet 20 as the second sheet that is folded back and located on the center side is adhered by an adhesive in a range extending from the ventral upper region 12FU to the dorsal upper region 12RU. The leg gather 23 is located at the inner edge of the ventral pocket 30F and the dorsal pocket 30R extending in the front-rear direction Y.

The second elastic member 23E also extends from the ventral lower region 12FD to the dorsal lower region 12RD via the inseam 10C in a state where a plurality of the second elastic members 23E are parallel to each other and are stretched by applying the hot melt adhesive. Is postponed. At both side edges of the absorbent body 16 in the left-right direction X, the base end portion 21B of the three-dimensional gather 21 is adhered to the seat side edge portion 18A and overlaps with the leg gather 23. Also in the leg gather 23, the tip portion in the front-rear direction Y is located inside the ventral pocket 30F and the dorsal pocket 30R.

The second elastic member 23E2, which is the farthest from the center line P among the plurality of second elastic members 23E, is located so as to protrude from the back sheet 17. As a result, in the seat side edge portion 18A, the portion where the back sheet 17 does not exist has increased flexibility due to the absence of the back sheet 17, and is more likely to rise due to the contraction force of the second elastic member 23E2.

Next, the action of the diaper 10 configured as described above will be described.
As shown in FIG. 5B, when the diaper 10 is attached, the second elastic member 23E extends, and the inner elastic portions 27F and 27R pull the seat side edge portion 18A toward the center line P side. Then, the leg gather 23 stands up. Further, even in the three-dimensional gather 21, the first elastic member 21E extends and stands up. The leg circumference opening 10L has a double structure with two gathers. Then, a V-shaped groove 23D is formed between the three-dimensional gathers 21 and the leg gathers 23 that rise in the skin contact direction.

When excrement such as urine is discharged, the diaper 10 flows on the inner surface of the absorbent body 16 in the inseam 10C in the ventral and dorsal directions. FIG. 6 conceptually shows the flow direction of excrement in the unfolded state of the diaper 10. The excrement flows toward the innermost part of the ventral pocket 30F and the innermost part of the dorsal pocket 30R while being absorbed by the absorber 18 through the top sheet 19, and each pocket is not absorbed by the absorber 18. It is stored in the innermost part of 30F and 30R.

Here, when the wearer turns over and changes his / her posture, the excrement stored in the innermost part of the pockets 30F and 30R moves toward the corner part (B part) in the left-right direction X of the pockets 30F and 30R. It flows. The innermost portion of the pockets 30F and 30R is a seal portion regardless of whether it is in the three-dimensional gather 21 or the leg gather 23, and is substantially flush with the surface of the top sheet 19. Further, the three-dimensional gather 21 is not provided with the first elastic member 21E, and is not a place where the side seat 21S stands up. Therefore, the excrement 23X that has flowed toward the corner portion in the left-right direction X flows from the corner portion into the groove 23D between the rising three-dimensional gather 21 and the leg gather 23 (see FIG. 5B). Since the side sheet 21S of the three-dimensional gather 21 is liquid permeable, the excrement 23X that has flowed into the groove 23D passes through the side sheet 21S and returns to the center line P side where the absorber 18 is present, and is absorbed. Absorbed by body 18.

As described above, according to the above embodiment, the effects listed below can be obtained.
(1) Even if the excrement 23X flows into the V-shaped groove 23D formed between the three-dimensional gather 21 rising in the skin contact direction and the leg gather 23, the side sheet 21S is liquid permeable. The excrement 23X in the groove 23D passes through the side sheet 21S, returns to the inside of the absorbent body 16 (in the direction of the center line P), and is absorbed by the absorber 18. Therefore, it is possible to prevent lateral leakage from around the legs.

(2) Since the structure of the three-dimensional gather 21 and the adhesive position of the side sheet 21S with respect to the absorbent main body 16 are the same as those of the existing diaper, it is not necessary to change the manufacturing equipment. Therefore, the diaper 10 can be easily manufactured.

(3) Of the plurality of second elastic members 23E, the second elastic member 23E2 farthest from the center line P is located so as to protrude to the outside of the back sheet 17. As a result, in the seat side edge portion 18A, the portion where the back sheet 17 does not exist has increased flexibility due to the absence of the back sheet 17, and the contraction force of the second elastic member 23E2 makes it easier to stand up from around the legs. Side leakage can be suppressed.

(4) The upper regions 12FU and 12FU are provided with inner elastic portions 27F and 27R located inside the end region 16A, and the lower regions 12FD and 12RD are provided with outer elastic portions located outside the end region 16A. By providing the portions 28F and 28R, the pockets 30F and 30R can be provided between the end region 16A and the inner elastic portions 27F and 27R. Therefore, leakage from around the waist can be suppressed.

The above embodiment can be modified as appropriate and implemented as follows.
When the side sheet 21S stands up in the skin contact direction, the inner surface on the center line P side may be a liquid permeable surface 21X, and the outer surface facing the groove 23D may be a liquid permeable surface 21Y. (See FIG. 5 (b)). As a result, in the left-right direction X, the three-dimensional gather 21 makes it difficult for excrement to permeate from the inside near the center line P toward the outside where the groove 23D exists, and permeates the excrement 23X from the groove 23D toward the inside. It can also be configured to be easy to use.

As shown in FIG. 5A, the three-dimensional gather 21 has an absorbent body from the folded-back portion 21T to the tip portion 21P, with the side sheet 21S as the folded-back portion 21T at the edge portion of the base end portion 21B near the center line P. It is configured by folding back so as to face both ends of the left-right direction X of 16, but not limited to this, the tip portion 21P is inside the absorbent body 16 in the left-right direction X (center line P side) without folding back at the folded-back portion 21T. ) May be oriented.
Further, as shown in FIG. 5A, the three-dimensional gather 21 has a double structure from the base end portion 21B to the tip portion 21P, but is not limited to this, and only the tip portion 21P has a double structure. It may be.

-The three-dimensional gather 21 may have only the region corresponding to the inseam 10C located below when the wearer wears the diaper 10 as the liquid permeable portion. For example, the liquid permeable portion can be partially provided by hydrophilizing the hydrophobic liquid impermeable sheet only at the position where the liquid permeable portion is provided. The liquid permeable portion may be provided only in the region located at the lowermost part of the inseam 10C, especially when the diaper 10 is worn.

-In the state of FIG. 5A, the absorber 18 may be extended to a position corresponding to both ends of the top sheet 19 in the left-right direction X and both ends of the cover sheet 20 as an example. In such a case, the excrement that has flowed into the groove 23D is also absorbed by the absorber 18 located below the top sheet 19 through the base end portion 21B of the liquid-permeable side sheet 21S and the top sheet 19.

The absorber 18 may not extend to either the ventral pocket 30F or the dorsal pocket 30R, or may extend only to the inseam 10C.
The size of the dorsal pocket 30R may be the same as the size of the ventral pocket 30F, or the dorsal pocket 30R may be larger than the ventral pocket 30F.
-A configuration in which either the pockets 30F or 30R may be omitted may be used.

The number of the second elastic members 23E2 located so as to protrude to the outside of the back sheet 17 is not particularly limited, and may be one or a plurality as in the above example. .. Further, the second elastic member 23E protruding to the outside of the back sheet 17 may not be provided.

-The shapes of the pockets 30F and 30R are not particularly limited as long as they can prevent the inflow of excrement and accommodate them. For example, the pockets 30F and 30R may have an Ω shape as a whole, for example, the width of the opening end of the pockets 30F and 30R is narrowed. As a result, it is possible to prevent the excrement that has entered the pockets 30F and 30R from returning. Further, the width of the opening ends of the pockets 30F and 30R may be wider than the side of the waist circumference opening 10A side.

The outer body of either the ventral outer body 12F or the dorsal outer body 12R may have an upper region 12FU, 12RU and a lower region 12FD, 12RD, and each outer body may have an upper region 12FU, 12FU. The configuration may not be divided into 12RU and the lower regions 12FD and 12RD.

-In the diaper 10, when the portion of the waist circumference opening 10A can be strong enough not to be torn by, for example, one sheet, the ventral inner sheet portion 25F and the dorsal inner sheet portion 25R are end portions. It does not have to be connected in a series at the inner position and the outer position with respect to the region 16A. That is, the portion of the waist circumference opening 10A may be composed of only the ventral outer seat portion 26F and the dorsal outer seat portion 26R.

-As a pants-type diaper, it is provided with a three-dimensional gather 21 and a leg gather 23 and a pocket, and can be applied to a two-piece structure of an absorbent main body and an exterior body in which the ventral side and the back side are connected at the inseam. Further, the diaper is not limited to the pants type diaper, and may be a tape type diaper. Further, it may be a disposable diaper for infants or for adults such as the elderly and persons with disabilities who require long-term care.

10 ... diaper, 10A ... waist opening, 10C ... crotch, 10F ... front body, 10L ... leg opening, 10R ... back body, 10W ... waist, 11 ... joint, 12F ... ventral exterior , 12FD ... ventral lower region, 12FU ... ventral upper region, 12R ... dorsal exterior body, 12RD ... dorsal lower region, 12RU ... dorsal upper region, 15FD ... ventral lower elastic member, 15FU ... ventral upper elastic Member, 15RD, 15RD1 ... Back lower elastic member, 15RU ... Back upper elastic member, 16 ... Absorbent body, 16A ... End region, 17 ... Back sheet, 18 ... Absorber, 18A ... Seat side edge, 18B ... peripheral part, 18F ... ventral end, 18R ... dorsal end, 19 ... top sheet, 20 ... cover sheet, 21 ... three-dimensional gather, 21B ... base end, 21C ... seal, 21E ... first elastic member , 21P ... Tip, 21S ... Side sheet, 21T ... Folded part, 21X, 21Y ... Surface, 22A ... 1st bonding area, 22B ... 2nd bonding area, 22C ... 3rd bonding area, 23 ... Leg gather, 23D ... Groove , 23E ... 2nd elastic member, 23E2 ... 2nd elastic member, 23X ... excrement, 24 ... 1st adhesive, 25 ... 2nd adhesive, 25F ... ventral inner sheet part, 25R ... dorsal inner sheet part, 26F ... ventral outer seat, 26R ... dorsal outer seat, 27F ... ventral medial elastic, 27R ... dorsal medial elastic, 28F ... ventral lateral elastic, 28R ... dorsal lateral elastic, 30F ... Ventral pocket, 30R ... Dorsal pocket, 34 ... Margin, 36 ... Abdomen, 37 ... Recess, 38 ... Back, 39 ... Butt.

Claims (4)

The first exterior body that makes up the front view and
The second exterior body that makes up the back body,
An absorbent body having an end region in the front-rear direction that overlaps the first exterior body and the second exterior body, and a crotch portion located between the first exterior body and the second exterior body.
A pocket located in at least one end region of the absorbent body and having an open end facing the inseam.
It is a three-dimensional gather provided on the inner surface of the absorbent body and along each side edge portion along the front-rear direction, and each three-dimensional gather is a first elastic member extending in the front-rear direction and the first elastic member. The three-dimensional gather having the first sheet sandwiching the elastic member, and
Leg gathers provided on each side edge of the absorbent body along the front-rear direction, wherein each leg gather comprises a second elastic member extending in the front-rear direction and a second sheet sandwiching the second elastic member. With the above-mentioned leg gathers
Each of the first exterior body and the second exterior body includes an upper region and a lower region constituting the waist circumference portion of the disposable diaper.
The upper region comprises an inner elastic portion located inside the end region.
The lower region comprises an outer elastic portion located outside the end region.
The inner elastic portion is non-adhesive in a region overlapping the end region, and is adhered to a sheet portion located outside the end region around the end region.
The pocket is formed between the inner elastic portion and the end region, and the ends of the first sheet and the second sheet in the front-rear direction are located inside the pocket.
The first elastic member has a length straddling the lower region of the first exterior body, the crotch portion, and the lower region of the second exterior body.
The second elastic member extends from the lower region of the first exterior body through the crotch portion to the lower region of the second exterior body in an extended state.
The first sheet is a disposable diaper having a liquid permeable portion at least in the inseam. The three-dimensional gather includes a base end portion to which the first sheet sandwiching the first elastic member is adhered to the absorbent body.
The disposable diaper according to claim 1, wherein the base end portion overlaps with the leg gather. In a state where the three-dimensional gather stands up with respect to the absorbent main body, the liquid permeable portion is liquid impermeable from the center line in the left-right direction to the outside in the left-right direction of the absorbent main body. The disposable diaper according to claim 1 or 2, which is liquid permeable from the outside toward the center line. The absorbent body includes a top sheet in contact with the skin, a back sheet on the opposite side of the skin, and an absorber located between the top sheet and the back sheet.
A plurality of the second elastic members are provided, and the second elastic member is provided.
The second elastic member located on the outermost side in the left-right direction of the absorbent body is any one of claims 1 to 3 located on the outside of the back sheet in the left-right direction of the absorbent body. Disposable diapers listed in.

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