JP7031295B2 - 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 is provided with an absorbent body including a rear end portion joined to the second exterior body. 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 part 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 waist around the waist along the direction around the waist. 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 with a sheet at both side edges along the front-rear direction. The leg gather is located at the opening around the leg when worn. Leg gathers and three-dimensional gathers are configured 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 constituting the front body, a second exterior body constituting the rear body, and an end in the front-rear direction overlapping the first exterior body and the second exterior body. A disposable diaper comprising a partial area, a crotch portion located between the first exterior body and the second exterior body, and an absorbent body having an absorbent body, and at least one of the absorbent main bodies. A three-dimensional gather located in the end region and having an open end facing the lower crotch, and provided on the inner surface of the absorbent body and along each side edge along the front-rear direction. Each of the three-dimensional gathers has a first elastic member extending in the front-rear direction, a first sheet sandwiching the first elastic member, and side edges of the absorbent body along the front-rear direction. Each leg gather provided with the leg gather having a second elastic member extending in the front-rear direction and a second sheet sandwiching the second elastic member, and the inside of the pocket, said. The three-dimensional gathers and the ends of the leg gathers in the anteroposterior direction are located, and the three-dimensional gathers include a base end portion to which the first sheet sandwiching the first elastic member is adhered to the inner surface of the absorbent body. An exposed portion that exposes the inner surface of the absorbent body is formed between the base end portion and the leg gather, and the absorber extends to the position of the exposed portion in the left-right direction of the absorbent body. There is.

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 into 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 is absorbed by the absorber through the exposed portion. This makes it possible to suppress leakage from around the legs.

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. In the three-dimensional gather, the base end portion is adhered to the top sheet, the top sheet is liquid permeable, the first sheet is liquid impermeable, and the top sheet is exposed in the exposed portion. It may be configured as such.
According to the above configuration, the exposed portion is absorbed by the absorber through the top sheet.

In the disposable diaper, the exposed portion is provided in the crotch portion, and the absorber extends to the position of the exposed portion in the crotch portion in the left-right direction of the absorbent body. May be good.
According to the above configuration, the excrement that has flowed into the groove can be absorbed in the inseam.

In the disposable diaper, the exposed portion is provided in the end region, and the absorber extends to the position of the exposed portion in the end region in the left-right direction of the absorbent body. It may be configured.
According to the above configuration, excrement flowing into the groove can be absorbed in the end region.

In the disposable diaper, a plurality of the 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 the back in the left-right direction of the absorbent body. It may be configured to be located on the outside of the seat.
According to the above configuration, in the portion where the back sheet does not exist, the flexibility is increased due to the absence of the back sheet, and the leg gathers can easily stand up.

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 the waist circumference portion of the disposable diaper, and the upper region is the above-mentioned disposable diaper. 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.

In the disposable diaper, the absorber may extend to a position overlapping the pocket in the front-rear direction.
According to the above configuration, excrement can be absorbed even in the pocket.

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

The perspective view of the pants-type disposable diaper in the 1st Embodiment which embodied the absorbent body of this 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 in FIG. 2 (a). The plan view which shows corresponding to. FIG. 1 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. 2A, (b) is a cross-sectional view of a reference example, and (c) is FIG. 2 showing a state in which leg gathers have risen from the state of (a). A cross-sectional view taken along line 5-5 of a). The plan view which shows the flow direction of excrement in the unfolded state of the pants-type disposable diaper of FIG. FIG. 2 is a plan view showing a developed state of a modified example of a diaper having a notch in an absorber corresponding to FIG. 2 (a). FIG. 2 is a plan view showing a developed state of a modified example of a diaper in which an absorber is not extended in the dorsal pocket, corresponding to FIG. 2 (a).

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 8.
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. It is provided with a back body 10R and a crotch lower part 10C connecting the front body 10F and the back body 10R.

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 of the front body 10F, the left and right ends of the rear body 10R, and the left and right ends of the inseam 10C form a pair of left and right leg-circumferential openings 10L having a shape surrounding the thigh portion of the human body. ing. Further, the left and right ends of the front body 10F and the rear body 10R in the body circumference direction are joint portions 11.

2 (a) is a plan view showing a developed state of a pants-type disposable diaper, and FIG. 2 (b) is a cross-sectional view taken along line 2B-2B of (a). In FIG. 2B, the right side is the skin side of the diaper wearer, that is, the side closer to the skin of the wearer.

The waist circumference 10W in the front body 10F is composed of the ventral exterior body 12F as the ventral first exterior body, and the waist circumference 10W in the rear body 10R is the dorsal exterior as the dorsal second exterior body. It is composed of the 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 direction around the waist, 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 an 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 is provided with 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 properties. 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 non-woven fabric having liquid permeability composed of fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester and nylon and having 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 feeling of 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 body of the absorbent material forming the absorbent body 18 is a molded body of an absorbent material such as fluff pulp, a highly absorbent polymer, and 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 comprises 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 (see FIG. 5A). 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 a peripheral region (peripheral portion). 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 configured 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 of the cover sheet 20 extending in the front-rear direction Y 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 having the left-right direction X as the longitudinal direction (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R). 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 having the left-right direction X as the longitudinal direction (between the ventral outer seat portion 26F and the ventral inner seat portion 25F). 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 having the left-right direction X as the longitudinal direction (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R). 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 in 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, in 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, in a cut state. As a result, the absorbent main body 16 suppresses the contraction of the absorbent main body 16 in accordance with the contraction of the ventral lower elastic member 15FD and the dorsal lower elastic member 15RD, and suppresses the formation of 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. In 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). is 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 series by the ventral outer seat portion 26F and the ventral inner seat portion 25F.

The dorsal upper region 12RU constitutes the 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 most. .. 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 inner 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 configured 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 inner elastic portion 27F and the dorsal medial elastic portion 27R, the ventral inner sheet portion 25F and the dorsal inner sheet portion 25R are non-adhesive so as not to be adhered to the top sheet 19 of the end region 16A. Further, in the ventral inner 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 connected to each other 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 becomes 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 formed by the second adhesive 25. The region to be bonded becomes 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. Will be. 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 lower crotch portion 10C. In the inner portion of the concave portion, the ventral inner elastic portion 27F and the dorsal inner 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 sheet 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 opening end on the crotch portion 10C side and are configured to accommodate excrement such as urine and stool 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 suppresses the leakage of an object toward the opening around the waist 10A.

Further, as shown in FIG. 3B, in the ventral lower region 12FD and the dorsal lower region 12RD, the ventral inner sheet portion 25F and the dorsal inner sheet 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 adhesive 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 tends to be in an open state due to the recessed crotch portion, and excrement also tends 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 portion other than the ventral pocket 30F is housed in the ventral pocket 30F in a rolled state.

Further, since the dorsal pocket 30R is smaller and shallower than the ventral pocket 30F, the buttocks 39 make 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 flowing 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 are joined to the dorsal outer seat portion 26R and the dorsal inner seat portion 25R at the joint portion 11. This makes it possible to prevent the legs from entering the gap between the upper region and the lower region even when the diaper 10 is worn, 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 sheet 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 impermeable property.

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 anteroposterior 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 left-right end of the absorbent body 16 by 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 a folded portion 21T, and the folded portion 21T to the tip portion 21P face both ends of the absorbent 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. The three-dimensional gather 21 is not limited to the case where the base end portion 21B to the tip portion 21P has a double structure as shown in FIG. 5A, and even if only the tip portion 21P has a double structure. good. Further, as shown in FIG. 5A, the three-dimensional gather 21 has 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, and the folded-back portion 21T to the tip portion 21P are absorbent. It is configured by folding back so as to face both ends of the left-right direction X of the main body 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) without folding back at the folded-back portion 21T. It may be configured to face the side).

The first elastic member 21E does not exist in the ventral upper region 12FU and the dorsal upper region 12RU inside the ventral pocket 30F and the dorsal pocket 30R. The entire region from the tip portion 21P to the folded portion 21T of the side sheet 21S 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 (FIG. 2). (A)).

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 main 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 anteroposterior direction Y.

The second elastic member 23E also extends from the ventral lower region 12FD to the dorsal lower region 12RD via the crotch lower portion 10C in a state where a plurality of the second elastic members 23E are parallel to each other and the hot melt adhesive is applied and stretched. Is postponed. At both side edges of the absorbent body 16 in the left-right direction X, the top sheet 19 is exposed to the outside between the second elastic member 23E1 near the center line P in the left-right direction X and the base end portion 21B of the three-dimensional gather 21. It becomes part 23C. The exposed portion 23C is provided in a range extending from the ventral upper region 12FU to the dorsal upper region 12RU in the anteroposterior direction Y. 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.

FIG. 5B shows a diaper as a reference example. Conventionally, as in the reference example, the base end portion 21B of the three-dimensional gather 21 is located at the seat side edge portion 18A and overlaps with the leg gather 23. The side sheet 21S is made of a non-woven fabric having liquid impermeable property so that excrement does not flow out toward the leg gather 23. Therefore, the base end portion 21B of the three-dimensional gather 21 overlaps with the position of the leg gather 23, and even if the excrement flows into the groove 23D between the three-dimensional gather 21 and the leg gather 23 at the time of mounting, the excrement is still present. It is hardly absorbed by the absorbent body 16. This is because the exposed portion 23C as shown in FIG. 5A does not exist.

In this regard, in FIG. 5A, the base end portion 21B to which the side sheet 21S sandwiching the first elastic member 21E is adhered to the inner surface of the absorbent body 16 is absorbed between the base end portion 21B and the leg gather 23. The exposed portion 23C that exposes the inner surface of the sex body 16 is configured. As an example, the base end portion 21B is provided with an exposed portion 23C between the leg gather 23 and the second elastic member 23E1 closest to the center line P of the absorbent body 16. In the exposed portion 23C, the liquid-permeable top sheet 19 is exposed, and further, in the exposed portion 23C, the absorber 18 extends to the portion of the top sheet 19. Therefore, as shown in FIG. 5C, even if excrement flows into the V-shaped groove 23D between the three-dimensional gathers 21 and the leg gathers 23 that rise in the skin contact direction when the diaper 10 is worn. The excrement 23X is absorbed by the absorber 18 through the top sheet 19 of the exposed portion 23C, and lateral leakage from around the legs can be suppressed.

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. The number of the second elastic members 23E protruding from the back sheet 17 may be a plurality.

Next, the operation of the diaper 10 configured as described above will be described.
When the diaper 1 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, so that 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.

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 also a sealing portion of the three-dimensional gather 21, where the base end portion 21B and the surface of the top sheet 19 are substantially flush with each other. The three-dimensional gather 21 is not a place where the side sheet 21S stands up because the first elastic member 21E is not arranged. Therefore, the excrement that has flowed toward the corner portion in the left-right direction X flows from the corner portion into the groove 23D (see FIG. 5C) between the rising three-dimensional gather 21 and the leg gather 23. The position of the groove 23D is provided with an exposed portion 23C in which the base end portion 21B of the three-dimensional gather 21 does not exist. Therefore, even if the excrement flows into the groove 23D, it is absorbed by the absorber 18 through the top sheet 19. In this embodiment, the absorber 18 is present in the exposed portion 23C at the position of the inseam 10C, in the lower regions 12FD and 12RD, and in the upper regions 12FU and 12RU. Therefore, no matter where the wearer moves and the excrement in the groove 23D moves, the excrement can be absorbed by the absorber 18.

As described above, according to the above embodiment, the effects listed below can be obtained.
(1) The absorber 18 extends from the position of the exposed portion 23C, that is, from the center line P to the position of the exposed portion 23C in the left-right direction X of the absorbent main body 16 and in the left-right direction X of the absorbent main body 16. Therefore, even if the excrement flows into the groove 23D between the three-dimensional gather 21 and the leg gather 23, the excrement can be absorbed by the absorber 18. Therefore, it is possible to prevent lateral leakage from around the legs.

(2) In the exposed portion 23C, the excrement 23X can be absorbed by the absorber 18 through the top sheet 19.
(3) The excrement that has flowed into the groove 23D between the three-dimensional gather 21 and the leg gather 23, such as when the wearer stands, tends to collect at the position of the inseam 10C. In this regard, since the exposed portion 23C is also provided in the lower crotch portion 10C and the absorber 18 is also arranged under the exposed portion 23C, the excrement accumulated in the lower crotch portion 10C portion of the groove 23D is absorbed from the exposed portion 23C. It can be absorbed by the body 18.

(4) When the wearer turns over, the pockets 30F and 30R tend to collect in the corners in the left-right direction X at the innermost part. In this respect, the exposed portion 23C is also provided in the pockets 30F and 30R (the portion of the end region 16A), and the absorber 18 is also arranged under the exposed portion 23C. The excrement accumulated in the corner portion (B portion) can be absorbed by the absorber 18 from the exposed portion 23C.

(5) 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.

(6) 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 with respect to 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.
(7) The excrement that has entered the pockets 30F and 30R can also be absorbed by the absorber 18.

In addition, the above-mentioned embodiment can be changed as appropriate and carried out as follows.
-As shown in FIG. 7, the absorber 18 may be provided with a notch 18C at the position of the inseam 10C to escape the base of the leg. In this case, in the inseam 10C, the absorber 18 does not have to be located below the exposed portion 23C. However, the absorber 18 is configured to be located below the exposed portion 23C at the position of the upper regions 12FU and 12RU (end region 16A) where the lower regions 12FD and 12RD and the pockets 30F and 30R are provided. In such a case, the excrement 23X flowing into the groove 23D is absorbed by the absorber 18 at the exposed portion 23C in the end region 16A.

Contrary to the example of FIG. 7, the absorber 18 may be configured such that the absorber 18 exists under the exposed portion 23C only in the portion of the inseam 10C. In such a case, the excrement that has flowed into the groove 23D is absorbed by the absorber 18 at the exposed portion 23C in the crotch portion 10C.

-As shown in FIG. 8, the absorber 18 may be arranged in the ventral pocket 30F, and the absorber 18 may not be arranged in the dorsal pocket 30R. On the contrary, the absorber 18 may not be arranged in the ventral pocket 30F, and the absorber 18 may be arranged in the dorsal pocket 30R. Further, as shown in FIG. 2, the absorber 18 may be present in the area of the ventral pocket 30F as well as the dorsal pocket 30R, and may not be present in both the ventral pocket 30F and the dorsal pocket 30R. You may.

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.
-The pocket 30F or 30R may be omitted.

The number of the second elastic members 23E2 protruding from 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 structure of the absorbent body 16 is not particularly limited as long as the inner surface in contact with the skin is liquid absorbent and the absorbent body 18 is provided. For example, the cover sheet 20 may be made impermeable to liquid and the back sheet 17 may be omitted.
The side sheet 21S may be liquid permeable. In this case, the excrement that has flowed into the groove 23D through the three-dimensional gather 21 can be absorbed by the absorber 18 through the exposed portion 23C.

-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 open 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.

-Any outer body of the ventral outer body 12F and the dorsal outer body 12R may be configured to have an upper region 12FU, 12RU and a lower region 12FD, 12RD, and any of the outer bodies may have an upper region 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 external seat portion 26F and the dorsal external 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 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, but may be a tape type diaper. In addition, disposable diapers for infants or adults such as the elderly and persons with disabilities who require long-term care may be used.

P ... center line, X ... left-right direction, Y ... front-back direction, 10F ... front body, 10R ... back body, 10W ... waist circumference, 10A ... waist circumference opening, 10L ... leg circumference opening, 10C ... crotch part, 11 ... Joint, 12F ... ventral exterior, 12FD ... ventral lower region, 12FU ... ventral upper region, 12R ... dorsal exterior, 12RD ... dorsal lower region, 12RU ... dorsal upper region, 15FD ... belly Lower side elastic member, 15FU ... Abdominal upper elastic member, 15RD, 15RD1 ... Back lower elastic member, 15RU ... Back upper elastic member, 16 ... Absorptive body, 16A ... End region, 17 ... Back sheet, 18 ... Absorber, 18A ... sheet side edge, 18C ... notch, 18F ... ventral end, 18R ... dorsal end, 19 ... top sheet, 20 ... cover sheet, 21 ... three-dimensional gather, 21B ... base end, 21C ... Seal portion, 21E ... First elastic member, 21P ... Tip portion, 21S ... Side sheet, 21T ... Folded portion, 22A ... First adhesive region, 22B ... Second adhesive region, 22C ... Third adhesive region, 23 ... Leg gather, 23C ... exposed part, 23D ... groove, 23E, 23E1, 23E2 ... second elastic member, 23X ... excrement, 24 ... first adhesive, 25 ... second adhesive, 25F ... ventral inner sheet part, 25R ... dorsal inner seat, 26F ... ventral outer seat, 26R ... dorsal outer seat, 27F ... ventral medial elastic, 27R ... dorsal medial elastic, 28F ... ventral lateral elastic, 28R ... dorsal. Lateral elastic part, 30F ... ventral pocket, 30R ... dorsal pocket, 34 ... margin, 36 ... abdomen, 37 ... recess, 38 ... back, 39 ... buttocks.

Claims (5)

The first exterior body that makes up the front body 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, a crotch portion located between the first exterior body and the second exterior body, and an absorber. It is a disposable diaper equipped with
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 for sandwiching the elastic member, and
It is a leg gather provided at each side edge portion of the absorbent body along the front-rear direction, and each leg gather has a second elastic member extending in the front-rear direction and a second sheet sandwiching the second elastic member. Equipped with the above-mentioned leg gathers
Inside the pocket, the three-dimensional gathers and the ends of the leg gathers in the anteroposterior direction are located.
The three-dimensional gather includes a base end portion to which the first sheet sandwiching the first elastic member is adhered to the inner surface of the absorbent body, and the absorbent body is provided between the base end portion and the leg gather. It constitutes an exposed part that exposes the inner surface,
The exposed portion is provided in the inseam and the end region.
The absorber has a notch at the position of the inseam and has a notch.
In the inseam, the absorber is configured not to be present at the position of the exposed portion in the left-right direction of the absorbent body, and in the end region, the absorbent body is absorbed in the left-right direction of the absorbent body. A disposable diaper whose body extends to the position of the exposed part. The absorbent body comprises a topsheet in contact with the skin, a backsheet on the opposite side of the skin, and an absorber located between the topsheet and the backsheet.
In the three-dimensional gather, the base end portion is adhered to the top sheet.
The top sheet is liquid permeable, and the first sheet is liquid opaque.
The disposable diaper according to claim 1 , wherein the top sheet is exposed in the exposed portion. 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 located outside the back sheet of the absorbent body in the left-right direction of the absorbent body according to claim 2 . Disposable diapers. At least one 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 inward with respect to the end region.
The lower region comprises an outer elastic portion located outside the end region.
The inner elastic portion is non-adhesive in the region overlapping the end region and is adhered to the sheet portion located outside the end region around the end region.
The disposable diaper according to any one of claims 1 to 3 , wherein the pocket is formed between the inner elastic portion and the end region. The disposable diaper according to claim 4 , wherein the absorber extends to a position overlapping the pocket in the front-rear direction.

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