JP6863173B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article with leg gathers and three-dimensional gathers.

As shown in Patent Document 1, in a disposable diaper as an absorbent article, a first exterior portion constituting the front body, a second exterior portion constituting the rear body, and a front end portion are joined to the first exterior portion. It is composed of an absorbent body whose rear end is joined to the second exterior. The first exterior portion and the second exterior portion are formed by bending the absorbent body in two and joining both ends of each exterior portion in the waist circumference direction to form a waist circumference portion at the upper end portion and a lower end portion. The leg circumference opening is constructed. In most disposable diapers, leg gathers are arranged around the opening around the legs, and three-dimensional gathers are arranged at both ends along the front-rear direction, which is the inner surface that comes into contact with the skin of the absorbent body. Leg gathers and three-dimensional gathers are constructed by sandwiching an elastic member such as rubber thread between sheets.

Japanese Unexamined Patent Publication No. 2006-263306

Even in an absorbent article equipped with leg gathers and three-dimensional gathers, if the leg gathers and three-dimensional gathers are separated from the skin and do not adhere to the skin, a gap is created around the legs, which causes excrement to leak from the legs.

An object of the present invention is to provide an absorbent article capable of suppressing leakage from a leg circumference.

The absorbent article for solving the above problems is an absorbent main body in which the first exterior portion, the second exterior portion, and the regions at both ends in the front-rear direction overlap and adhere to the first exterior portion and the second exterior portion. Of the first exterior portion and the second exterior portion, in an absorbent article in which the absorbent body is located between the first exterior portion and the second exterior portion and constitutes the inseam. At least one includes an upper region constituting a waist circumference portion and a lower region located below the upper region, and the absorbent body is both side edges along the anterior-posterior direction and the inseam. A three-dimensional gather arranged in a range including a portion, the first elastic member extending in the front-rear direction is sandwiched between the side sheets extending in the front-rear direction, and the base end portion is adhered to the inner surface side of the absorbent body. It is provided with gathers and leg gathers in which a second elastic member extending in the front-rear direction is sandwiched between sheets at both side edges, and the end portion of the first elastic member is more than the end portion of the lower region on the inseam side. It is on the upper region side and is located on the crotch side of the upper region on the crotch side, and the end of the second elastic member is on the crotch side of the lower region. It is located closer to the upper region than the end.

According to the above configuration, in an absorbent article having an upper region and a lower region on the exterior body, leakage from the leg circumference can be suppressed by providing the three-dimensional gathers and the leg gathers. Further, since the ends of the first elastic member and the second elastic member are located in the lower region, the three-dimensional gathers and the leg gathers can be firmly raised around the legs. As a result, leakage from the leg circumference can be suppressed.
Further, when worn, the liquid that has entered the groove formed between the three-dimensional gathers and the leg gathers flows toward the upper region when the wearer's posture changes. In the upper region, the first elastic member is not arranged in the three-dimensional gather, and no groove is formed. Therefore, the liquid can flow in the direction of the absorption region. As a result, leakage from the leg circumference can be suppressed.

In the absorbent article, the end portion of the three-dimensional gather in the front-rear direction is a region overlapping the upper region, and a part of the region extending from the tip portion to the folded portion of the three-dimensional gather is adhered to the base end portion side. It may be configured as such.
According to the above configuration, the three-dimensional gather can be raised in a range extending over the lower region on the ventral side, the inseam region, and the lower region on the dorsal side.

In the absorbent article, the end portion of the three-dimensional gather in the front-rear direction is a region overlapping the upper region, and the entire region extending from the tip portion to the folded portion of the three-dimensional gather is adhered to the base end portion side. It may be configured.
According to the above configuration, the three-dimensional gather can be raised in a range extending over the lower region on the ventral side, the inseam region, and the lower region on the dorsal side.

In the absorbent article, the upper region comprises an internal elastic portion located inside the end region, the lower region is located outside the end region, and the end region. It has an external elastic portion that is bonded to the outer surface, the internal elastic portion is non-adhesive in a region that overlaps the end region, and is located outside the end region around the end region. A pocket may be formed between the internal elastic portion and the end region so that the seat portion is adhered to the sheet portion and the open end is on the inseam side.
According to the above configuration, excrement can be stored in the pocket. In addition, three-dimensional gathers and leg gathers can guide excrement to the pocket.

According to the present invention, it is possible to provide an absorbent article capable of suppressing leakage from the leg circumference.

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 a pants-type disposable diaper according to the first embodiment, and (b) is a sectional view taken along the line aa of (a). (A) is a plan view showing the adhesive region of the upper region corresponding to FIG. 2 (a), and (b) is a plan view showing the adhesive region of the lower region corresponding to FIG. 2 (a). Cross-sectional view of the main part with the diaper attached. It is a figure which shows the state which the absorbent body extended in the width direction, (a) is the XX cross-sectional view in the crotch part of FIG. YY cross-sectional view, (c) is a ZZ cross-sectional view in the upper region of FIG. 2 (a). It is a figure which shows the state of the absorbent body at the time of wearing, (a) is the XX cross-sectional view in the crotch part of FIG. Y cross-sectional view, (c) is a ZZ cross-sectional view in the upper region of FIG. 2 (a).

A pants-type disposable diaper according to an embodiment embodying the absorbent article 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.

On the front body 10F, the side opposite to the inseam 10C constitutes a waist circumference portion 10W that surrounds the waist circumference portion of the human body, and a waist circumference opening 10A is provided 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 circumference openings 10L having a shape surrounding the thighs of the human body. doing. 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 the line aa of FIG. 2A. In FIG. 2B, the right side is the skin side of the diaper wearer.

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

The ventral exterior body 12F and the dorsal exterior body 12R have a rectangular shape with 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 may be a liquid-permeable sheet or a liquid-impermeable sheet. Good. 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 waist circumference direction.

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 body 16 has a rectangular shape with the front-rear direction as the longitudinal direction. As shown in FIG. 2B, the absorbent main body 16 has the liquid permeable back sheet 17, the absorber 18, the liquid permeable top sheet 19, and the 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 absorbent body 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. 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 absorber 18 is arranged in the central region and is located at the peripheral portion of the absorber 18. There is no absorber 18. Both side edges of the absorbent body 16 in the front-rear direction are sheet side edges 18A in which the absorber 18 does not exist. 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 of the cover sheet 20 inward. Further, the inner and outer surfaces of the regions overlapping the exterior bodies 12F and 12R in the front-rear direction of the absorbent body 16 are end regions 16A to which the sheets constituting the exterior body are adhered. The end region 16A is both ends of the absorbent body 16 in the front-rear direction, and includes the ventral end 18F and the dorsal end 18R of the absorber 18, the peripheral portions 18B of these ends 18F and 18R, and the seat. It is a region including the side edge portion 18A.

The ventral exterior body 12F includes a ventral upper region 12FU and a ventral lower region 12FD. The dorsal exterior body 12R also includes a dorsal upper region 12RU and a dorsal lower region 12RD.

As shown in FIG. 2B, in the ventral upper region 12FU and the dorsal upper region 12RU, the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are inside 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 portion 10W.

In the ventral upper region 12FU, a plurality of ventral upper elastic members 15FU are arranged in the longitudinal direction between the seats (between the ventral outer seat portion 26F and the ventral inner seat portion 25F), and both left and right ends in the waist circumference direction. It is arranged in a stretched state over the portions. In the dorsal upper region 12RU, a plurality of dorsal upper elastic members 15RU are arranged in the dorsal direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) in the longitudinal direction. It is arranged in a stretched state over both left and right ends.

Further, in the ventral lower region 12FD, a plurality of ventral lower elastic members 15FD are arranged in the waist direction between the seats (between the ventral outer seat portion 26F and the ventral inner seat portion 25F) with the waist circumference direction as the longitudinal direction. It is arranged over the left and right ends. In the dorsal lower region 12RD, a plurality of dorsal lower elastic members 15RD are arranged in the dorsal direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) in the longitudinal direction. It is arranged over the left and right ends. 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 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. The fold 16B can function as a guide leading to the dorsal pocket 30R.

As shown in FIG. 2B, the ventral upper region 12FU constitutes the ventral internal 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 a ventral external elastic portion 28F in which the ventral lower elastic member 15FD is sandwiched 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 the dorsal internal 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 internal elastic portion 27F sandwich the ventral upper elastic member 15FU and the ventral lower elastic member 15FD, and are bonded with the first adhesive 24. ing. The folded portions of the ventral outer seat portion 26F and the ventral inner seat portion 25F form a waist circumference opening 10A, and the waist circumference opening 10A is formed by stacking two sheets to increase the strength.

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 are bonded with the first adhesive 24. ing. 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.

In the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R, the ventral internal seat portion 25F and the dorsal internal seat portion 25R adjacent to the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are end regions 16A. It is non-adhesive to the top sheet 19 of. Further, in the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R, in the region around the end region 16A, the ventral internal sheet portions 25F folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25. Will be done. 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 internal elastic portion 27F in the ventral upper region 12FU, the ventral internal sheet portions 25F around the first adhesive region 22A and folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25. The region to be formed is the second adhesive region 22B. Further, in the dorsal internal 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. Become. The second adhesive region 22B in the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R has a concave shape facing the crotch lower portion 10C by being around the end region 16A. In the inner portion of the concave shape, the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R are non-adhesive portions to the top sheet 19 of the end region 16A. As a result, a ventral pocket 30F is formed between the ventral internal seat portion 25F of the ventral internal 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 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 in the front-rear direction of the end region 16A, and excrement contained in the pockets 30F and 30R can be collected. It suppresses leakage toward the waist circumference opening 10A.

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 outer elastic portion 28F and the dorsal outer 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 enter 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.

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

As shown in FIG. 2A, three-dimensional gathers 21 are arranged at both ends along the front-rear direction 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 of the absorbent body 16 and a side sheet 21S 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 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. The first elastic member 21E is shorter than the length of the side sheet 21S in the front-rear direction, and has a length straddling the ventral lower region 12FD, the crotch lower region 10C, and the dorsal lower region 12RD. Specifically, the front end portion of the first elastic member 21E is located on the ventral upper region 12FU side of the lower end portion of the ventral lower region 12FD, and is located on the crotch lower 10C side of the ventral upper region 12FU, that is, It is located in the ventral lower region 12FD. In this example, the front end portion of the first elastic member 21E is located at the end portion of the ventral lower region 12FD on the ventral upper region 12FU side. The rear end of the first elastic member 21E is located on the dorsal upper region 12RU side of the lower end of the dorsal lower region 12RD, and is on the crotch lower 10C side of the dorsal upper region 12RU, that is, on the dorsal side. It is located in the lower region 12RD. In this example, the rear end of the first elastic member 21E is located at the end of the dorsal lower region 12RD on the dorsal upper region 12RU side.

As shown in FIG. 5A, in the crotch portion 10C, the side sheet 21S sandwiching the first elastic member 21E is absorbed by each end of the two folded sheets, that is, the base end 21B of the three-dimensional gather 21. It is fixed to the sheet side edge 18A of the main body 16 by an adhesive 21A such as a hot melt adhesive. Specifically, the side sheet 21S sandwiching the first elastic member 21E is arranged so that the tip end portion extends from both ends in the left-right direction of the absorbent main body 16 toward the center line direction in the left-right direction, and the base end portion 21B. Is adhered by the adhesive 21A. Further, the side sheet 21S is folded back so that the edge portion on the center line side in the left-right direction of the base end portion 21B is the folded-back portion 21T, and the folded-back portion 21T to the tip portion 21P face both ends in the left-right direction of the absorbent main body 16. It has been.

As shown in FIG. 5B, also in the ventral lower region 12FD and the dorsal lower region 12RD, the base end portion of the three-dimensional gather 21 is fixed to the seat side edge portion 18A of the absorbent body 16 by the adhesive 21A. .. In the inseam 10C, the ventral lower region 12FD and the dorsal lower region 12RD, the side sheet 21S sandwiching the first elastic member 21E may stand up as a three-dimensional gather 21 in the skin contact direction. 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. The side sheet 21S sandwiching the first elastic member 21E can raise the non-adhesive portion if at least the tip portion 21P to the first elastic member 21E1 closest to the folded-back portion 21T are non-adhesive. The longer the non-adhesive portion up to the tip portion 21P, the higher the rising height of the three-dimensional gather 21, and the tip portion 21P can be firmly brought into contact with the skin.

As shown in FIG. 5C, in the ventral upper region 12FU and the dorsal upper region 12RU, the first elastic member 21E does not exist, and the entire region from the tip portion 21P to the folded portion 21T of the side sheet 21S is based. It is fixed to the end portion 21B and the sheet side edge portion 18A by the adhesive 21A to form a sealing portion 21C. The entire region from the tip portion 21P to the folded portion 21T of the side sheet 21S may be adhered to the second adhesive 25 with a series of adhesives. Further, the base end portion 21B may be adhered to the sheet side edge portion 18A or the sealing portion 21C may be heat welded.

Further, the seat side edge portion 18A of the absorbent main body 16 is configured by folding both side edge portions along the front-rear direction of the cover sheet 20 toward the center side. As shown in FIG. 2A, and 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 of the absorbent body 16 at the seat side edge portion 18A. Then, the tip portion overlapped with the folded cover sheet 20 is adhered by the adhesive 23C (see FIGS. 5A to 5C). The adhesive 23C is integral with the second adhesive 25 in the ventral lower region 12FD and the dorsal lower region 12RD and the ventral upper region 12FU and the dorsal upper region 12RU.

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. Specifically, the front end of the second elastic member 23E is located on the ventral upper region 12FU side of the ventral lower region 12FD on the crotch lower 10C side, and is inseam more than the ventral upper region 12FU. It is located on the part 10C side, that is, on the ventral lower region 12FD. In this example, the front end portion of the second elastic member 23E is located at the end portion of the ventral lower region 12FD on the ventral upper region 12FU side. Further, the rear end portion of the second elastic member 23E is located on the dorsal upper region 12RU side of the dorsal lower region 12RD on the crotch lower 10C side, and the crotch lower portion 10C is located on the dorsal upper region 12RU. It is located on the side, i.e., in the dorsal lower region 12RD. In this example, the rear end of the second elastic member 23E is located at the end of the dorsal lower region 12RD on the dorsal upper region 12RU side. The front end portion and the rear end portion of the second elastic member 23E may be located on the upper region 12FU, 12RU side of the lower region 12FD, 12RD on the crotch lower portion 10C side, for example, the second elastic member 23E. When the front end portion and the rear end portion of the leg gather 23 are positioned in the upper regions 12FU and 12RU, the range of the leg gather 23 can be made wider.

Each end of the leg gather 23 in the anteroposterior direction (seat side edge 18A in which the second elastic member 23E does not exist) has a ventral upper region 12FU and a ventral lower region 12FD, and a dorsal upper region 12RU and a dorsal lower region 12RD. In the entire area that overlaps with the ventral upper region 12FU and the dorsal upper region 12RU, the area from the tip (the left and right ends of the absorbent body 16) to the root (the end near the center line in the left and right direction) It is adhered to the sheets (ventral inner sheet portion 25F and dorsal inner sheet portion 25R) constituting the exterior body by the second adhesive 25 (see FIG. 5C).

Further, each end of the leg gather 23 in the front-rear direction is a region overlapping the ventral lower region 12FD and the dorsal lower region 12RD from the tip (left and right ends of the absorbent body 16) to the root (center line in the left and right direction). The area up to (the end close to) is not adhered to the sheet constituting the exterior body, and only the tip of the folded portion is second adhered to the sheet (ventral inner sheet part 25F and dorsal inner sheet part 25R). It is adhered by the agent 25 (see FIG. 5 (b)). In this way, the area from the tip of the leg gather 23 to the second elastic member 23E1 closest to the root is not at least the seats (ventral inner seat 25F and dorsal inner seat 25R) constituting the exterior body. It is said to be glued. As a result, the leg gather 23 has the seats (ventral inner seat portion 25F and dorsal inner seat portion 25R) in which the tip portion to the root portion constitutes the exterior body in the ventral lower region 12FD and the dorsal lower region 12RD. It is possible to stand up as compared with the case where it is completely adhered.

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.

Here, the states of the three-dimensional gathers 21 and the leg gathers 23 in the state where the diaper 10 is worn as described above will be described. As shown in FIG. 6A, in the inseam 10C, the leg gather 23 rises in a substantially vertical state in the skin contact direction due to the contraction of the second elastic member 23E, and the tip of the seat side edge 18A is in the inseam. Contact. Along with this, the three-dimensional gather 21 also rises at an acute angle (V-shape) in the skin contact direction (height direction) with respect to the seat side edge portion 18A due to the contraction of the first elastic member 21E. A groove 23A is formed between the three-dimensional gather 21 and the leg gather 23.

As shown in FIG. 6B, in the ventral lower region 12FD and the dorsal lower region 12RD, the leg gather 23 is relative to the ventral inner seat portion 25F and the dorsal inner seat portion 25R, although not as much as the inseam 10C. It rises in the skin contact direction, and the tip end portion of the seat side edge portion 18A abuts on the base portion of the leg portion. Along with this, the three-dimensional gather 21 also rises at an acute angle (V-shape) in the skin contact direction (height direction) with respect to the seat side edge portion 18A. The groove 23A between the three-dimensional gather 21 and the leg gather 23 is continuously formed from the inseam 10C and is also formed in the ventral lower region 12FD and the dorsal lower region 12RD.

As shown in FIG. 6 (c), in the ventral upper region 12FU and the dorsal upper region 12RU, the second elastic member 23E of the leg gather 23 is not arranged, and the seat side edge portion 18A is the waist of the wearer. As the internal elastic portions 27F and 27R contract, they bend and stand up so as to follow the shapes of the abdomen and the lumbar region. Further, the first elastic member 21E of the three-dimensional gather 21 is not arranged either. In the side sheet 21S of the three-dimensional gather 21 not provided with the first elastic member 21E, the entire region overlapping the ventral upper region 12FU and the dorsal upper region 12RU is adhered to the inner surface of the absorbent body 16. Therefore, the three-dimensional gather 21 flexes integrally with the seat side edge portion 18A and stands up. Then, following the rise of the three-dimensional gather 21 in the ventral upper region 12FU and the dorsal upper region 12RU, the ventral lower region 12FD, the dorsal lower region 12RD, and the leg gather 23 and the three-dimensional gather 21 of the inseam 10C also rise firmly. Further, the groove 23A is eliminated from the ventral upper region 12FU and the dorsal upper region 12RU by adhering the entire region of the side sheet 21S of the three-dimensional gather 21 to the inner surface of the absorbent main body 16. That is, the end point of the groove 23A is the boundary portion between the upper regions 12FU and 12RU and the lower regions 12FD and 12RD.

As shown in FIG. 6A, in the inseam 10C, the three-dimensional gather 21 is located inside and the leg gather 23 is located outside. Liquid 23B such as urine, which is excrement, may get over the three-dimensional gather 21 and invade between the three-dimensional gather 21 and the leg gather 23 at the inseam 10C. The liquid 23B between the three-dimensional gather 21 and the leg gather 23 travels along the groove 23A between the three-dimensional gather 21 and the leg gather 23 when the wearer's posture changes, and the ventral upper region 12FU and the dorsal upper region It flows in the direction of 12RU. Then, in the ventral upper region 12FU and the dorsal upper region 12RU, since the three-dimensional gather 21 is adhered to the seat side edge portion 18A, the groove 23A disappears, and the liquid 23B is contained in the pockets 30F and 30R in the absorption region. It will flow in the direction (D1 direction).

As described above, according to the above embodiment, the effects listed below can be obtained.
(1) The front body 10F and the back body 10R are divided into upper regions 12FU and 12RU and lower regions 12FD and 12RD, the internal elastic portions 27F and 27R are arranged inside the absorbent body 16, and the external elastic portions 28F and 28R are absorbent. In the diaper 10 arranged on the outside of the main body 16, the three-dimensional gathers 21 and the leg gathers 23 can be arranged. As a result, leakage from the leg circumference can be suppressed.

(2) In the three-dimensional gather 21, the front end of the first elastic member 21E is located at the end of the ventral lower region 12FD on the ventral upper region 12FU side, and the rear end is the dorsal upper portion of the dorsal lower region 12RD. It is located at the end on the region 12RU side. Further, also in the second elastic member 23E of the leg gather 23, the front end portion is located at the end portion on the ventral upper region 12FU side of the ventral lower region region 12FD, and the rear end portion is the dorsal upper region 12RU of the dorsal lower region region 12RD. It is located at the end of the side. That is, the ranges in which the first elastic member 21E and the second elastic member 23E are arranged in the front-rear direction are substantially the same range. As a result, the three-dimensional gather 21 and the leg gather 23 can function in the range from the inseam 10C to the open end of the pockets 30F and 30R, and the excrement can be reliably guided in the direction of the pockets 30F and 30R.

(3) In the ventral upper region 12FU and the dorsal upper region 12RU, the entire region of the three-dimensional gather 21 from the tip portion 21P to the folded portion 21T of the side sheet 21S is fixed by an adhesive to form a sealing portion 21C. Therefore, in the upper region, when worn, the three-dimensional gather 21 rises with the rise of the seat side edge portion 18A in which the leg gather 23 is formed, and further, following this rise, the ventral lower region 12FD and the dorsal lower region The three-dimensional gathers 21 of 12RD and the inseam 10C can also be raised firmly. As a result, leakage from the leg circumference can be suppressed.

(4) The seat side edge portion 18A flexes in the ventral upper region 12FU and the dorsal upper region 12RU so as to follow the shape of the abdomen and the lumbar region due to the contraction of the internal elastic portions 27F and 27R of the wearer's waist. Then stand up. Following the rise of the ventral upper region 12FU and the dorsal upper region 12RU, the leg gathers 23 in the ventral lower region 12FD and the dorsal lower region 12RD are formed from the tip portion (the left and right ends of the absorbent body 16) to the root portion (the left and right ends). Since the area up to the end near the center line in the left-right direction is not adhered to the ventral inner seat 25F and the dorsal inner seat 25R constituting the exterior body, the ventral inner seat 25F and the dorsal side It can stand up against the internal seat portion 25R. As a result, leakage from the leg circumference can be suppressed.

(5) The liquid 23B that has infiltrated into the groove 23A between the three-dimensional gather 21 and the leg gather 23 travels through the groove 23A when the wearer's posture changes, and the ventral upper region 12FU and the dorsal upper region 12RU. Flows in the direction of. When such a liquid 23B reaches the end point of the boundary portion between the upper regions 12FU and 12RU and the lower regions 12FD and 12RD, the groove 23A disappears, so that the direction of the absorption region (D1 direction) in the pockets 30F and 30R. And is absorbed by the absorber 18. Therefore, it is possible to prevent the liquid 23B that has entered the groove 23A from leaking out from the leg gather 23.

(6) In the ventral upper region 12FU and the dorsal upper region 12RU, the internal elastic portions 27F and 27R are not adhered to the end region 16A of the absorbent body 16 in the pockets 30F and 30R, so that they are ventral. The upper elastic member 15FU and the dorsal upper elastic member 15RU can be freely expanded and contracted. Therefore, the adhesion between the ventral upper region 12FU, the dorsal upper region 12RU, and the skin can be improved, and the followability to the wearer's movement can be improved. As a result, the occurrence of abdominal leakage and back leakage can be suppressed. Further, since the expansion and contraction of the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are not restricted, the feel in the ventral upper region 12FU and the dorsal upper region 12RU can be improved.

(7) Since the ventral external elastic portion 28F and the dorsal external elastic portion 28R are further arranged below the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R, the waist gather and the tammy gather are enlarged. , It is possible to suppress the occurrence of abdominal leakage and back leakage.

(8) Since the absorbent main body 16 is provided with the cover sheet 20 as the outermost sheet, it is possible to improve the feel on the outer surface of the inseam 10C.
(9) The ventral pocket 30F is made larger and deeper than the dorsal pocket 30R, a sufficient volume for accommodating excrement such as urine can be secured, and the occurrence of abdominal leakage can be suppressed.

(10) 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, when the diaper 10 is discarded, the joint portion 11 is broken, and the ventral exterior body 12F and the dorsal exterior body 12R can be removed from the wearer by a single tearing operation for separating both ends in the waist circumference direction.

The above embodiment can be modified as appropriate and implemented as follows.
The absorbent main body 16 may be configured to omit either the back sheet 17 or the cover sheet 20.

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 pockets 30F, 30R, or both may be omitted.

-The shapes of the pockets 30F and 30R are not particularly limited as long as they can prevent the ingress 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 in 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.

-In the diaper 10, only the upper regions 12FU and 12RU may be the elastic portions in which the elastic members are arranged in the waist circumference direction, or only the lower regions 12FD and 12RD may be the elastic portions in which the elastic members are arranged in the waist circumference direction. Further, in the opposite configuration to the above-described embodiment, the inner elastic portions may be formed in the lower regions 12FD and 12RD, and the external elastic portions may be formed in the upper regions 12FU and 12RU.

-The sheets constituting the ventral exterior body 12F and the dorsal exterior body 12R may be liquid-impermeable or liquid-permeable.
-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 in the end region. It does not have to be connected in a series at the inner position and the outer position with respect to 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.

In the ventral upper region 12FU and the dorsal upper region 12RU, the side sheet 21S that does not sandwich the first elastic member 21E of the three-dimensional gather 21 is not the entire region but a partial adhesive to the seat side edge portion 18A. It may be fixed by 21A. In this case, the folded side sheet 21S of the ventral upper region 12FU and the dorsal upper region 12RU hardly stands up because the first elastic member 21E is not arranged. Therefore, the side sheet 21S is in a state substantially similar to the case where the entire region is completely adhered to the sheet side edge portion 18A, and the groove 23A is not formed in the ventral upper region 12FU and the dorsal upper region 12RU. Therefore, the liquid 23B in the groove 23A in the inseam 10C can also flow in the direction of the absorption region (D1 direction) in the ventral upper region 12FU and the dorsal upper region 12RU.

The leg gather 23 is not formed by folding back the side edge portion of the cover sheet 20 and sandwiching the second elastic member 23E between them, for example, the side edge portions of the cover sheet 20 along the front-rear direction and the back sheet 17 and the like. A second elastic member 23E may be sandwiched between the topsheets 19 by overlapping the side edges along the longitudinal direction of the topsheet 19.

The end portion of the second elastic member 23E may be located above the end portion of the upper region 12FU, RU on the crotch lower portion 10C side, as long as the leg gather 23 stands up.

-It is sufficient that at least one of the ventral exterior body 12F and the dorsal exterior body 12R has an upper region and a lower region, and only one of the ventral exterior body 12F and the dorsal exterior body 12R is the upper portion. The configuration may include a region and a lower region.

The end portion of the three-dimensional gather 21 in the front-rear direction is configured to adhere the entire region from the tip portion 21P to the folded portion 21T of the three-dimensional gather 21 to the base end portion 21B side in the region overlapping the upper region. In the region overlapping the region, a part of the side sheet 21S from the tip portion 21P to the folded portion 21T may be bonded to the base end portion 21B side. For example, the intermediate portion or the tip of the tip of the side sheet 21S and the folded portion 21T may be non-adhesive to the base end portion 21B side.

-The absorbent article is not limited to the pants-type diaper in which the ventral exterior 12F and the dorsal exterior 12R are separated, but is a pants-type diaper in which the ventral exterior and the dorsal exterior are integrated. The diaper may be a tape type diaper as well as a pants 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.

10A ... waist opening, 10C ... lower crotch, 10F ... front body, 10L ... leg opening, 10R ... back body, 10W ... waist opening, 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 ... ventral lower elastic member, 15FU ... ventral upper elastic member, 15RD ... dorsal Lower elastic member, 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, 18F ... end, 18R ... dorsal end, 18R ... end, 19 ... top sheet, 20 ... cover sheet, 21 ... three-dimensional gather, 21A ... adhesive, 21B ... Base end portion, 21C ... Seal portion, 21E ... First elastic member, 21E1 ... First elastic member, 21P ... Tip portion, 21S ... Side sheet, 21T ... Folded portion, 22A ... First adhesive region, 22B ... Second adhesion Region, 22C ... 3rd adhesive region, 23 ... Leg gather, 23A ... Groove, 23B ... Liquid, 23C ... Adhesive, 23E ... 2nd elastic member, 24 ... 1st adhesive, 25 ... 2nd adhesive, 25F ... Abdomen Side inner seat part, 25R ... dorsal inner seat part, 26F ... ventral outer seat part, 26R ... dorsal outer seat part, 27F ... ventral inner elastic part, 27F ... inner elastic part, 27R ... dorsal inner elastic part , 27R ... internal elastic part, 28F ... ventral external elastic part, 28F ... external elastic part, 28R ... dorsal external elastic part, 28R ... external elastic part, 30F ... ventral pocket, 30R ... dorsal pocket, 34 ... margin Part, 36 ... abdomen, 37 ... depression, 38 ... back, 39 ... buttocks.

Claims (3)

The first exterior portion, the second exterior portion, and an absorbent main body in which an end region in the front-rear direction overlaps and adheres to the first exterior portion and the second exterior portion, and the first exterior portion and the first exterior portion are provided. 2 In an absorbent article in which the absorbent body located between the exterior portion constitutes the inseam.
At least one of the first exterior portion and the second exterior portion includes an upper region constituting a waist circumference portion and a lower region located below the upper region.
The absorbent body
It is a three-dimensional gather that is arranged on both side edges along the front-rear direction and includes the inseam, and the first elastic member extending in the front-rear direction is sandwiched between the side sheets extending in the front-rear direction. , it said standing gathers proximal end portion is adhered to the inner surface side of the absorbent body,
It is provided with a leg gather in which a second elastic member extending in the front-rear direction is sandwiched between sheets at both side edges.
The end of the first elastic member is closer to the upper region than the end of the lower region on the lower crotch side, and is closer to the lower crotch than the end of the upper region on the lower crotch side. Located in
The end portion of the second elastic member is located closer to the upper region side than the end portion of the lower region on the lower crotch side .
The end portion in the front-rear direction of the three-dimensional gather is an absorbent article in which the entire region extending from the tip portion to the folded portion of the three-dimensional gather is adhered to the base end portion side in a region overlapping the upper region. The first exterior portion, the second exterior portion, and an absorbent main body in which an end region in the front-rear direction overlaps and adheres to the first exterior portion and the second exterior portion, and the first exterior portion and the first exterior portion are provided. 2 In an absorbent article in which the absorbent body located between the exterior portion constitutes the inseam.
At least one of the first exterior portion and the second exterior portion includes an upper region constituting a waist circumference portion and a lower region located below the upper region.
The absorbent body
It is a three-dimensional gather that is arranged on both side edges along the front-rear direction and includes the inseam, and the first elastic member extending in the front-rear direction is sandwiched between the side sheets extending in the front-rear direction. , The three-dimensional gather whose base end is adhered to the inner surface side of the absorbent body,
A leggi in which a second elastic member extending in the front-rear direction is sandwiched between sheets at both side edges.
Equipped with a zir
The end of the first elastic member is closer to the upper region than the end of the lower region on the lower crotch side, and is closer to the lower crotch than the end of the upper region on the lower crotch side. Located in
The end portion of the second elastic member is located closer to the upper region side than the end portion of the lower region on the lower crotch side.
The upper region comprises an internal elastic portion located inside the end region.
The lower region comprises an external elastic portion that is located outside the end region and is adhered to the outer surface of the end region.
The internal 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.
A pocket with an open end on the inseam side is formed between the internal elastic portion and the end region.
Intake Osamusei goods. End in the longitudinal direction of the standing gathers, the in the upper region and the overlapping area, according to claim 2 in which part of the area over the turning portion from the tip portion of the three-dimensional gathers are bonded to the proximal end Absorbent article.

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