WO2018123514A1 - Absorbent article - Google Patents

Abstract

An absorbent article that comprises: a first exterior part; a second exterior part; an absorbent main body; and leg gathers that are respectively provided on side edge parts of the absorbent main body that run in the front-rear direction. Each leg gather has: at least one elastic member that extends in the front-rear direction; a sheet that sandwiches the elastic member(s); a tip part that corresponds to a left-right-direction end part of the absorbent main body; and a base part that is close to a left-right-direction center axis of the absorbent main body. In first regions at which the leg gathers overlap upper regions, the leg gathers are adhered to the first exterior part and/or the second exterior part between the tip parts and the base parts. In second regions at which the leg gathers overlap lower regions, the leg gathers are not adhered to the first exterior part and/or the second exterior part between the tip parts and anywhere between the base parts and the elastic members that are closest to the base parts.

Description

Absorbent articles

The present invention relates to an absorbent article provided with leg gathers.

As shown in Patent Document 1, a disposable diaper as an absorbent article includes a first exterior part that constitutes the front body, a second exterior part that constitutes the back body, and a front end part joined to the first exterior part. And an absorptive main body including a rear end portion joined to the second exterior portion. The first exterior part and the second exterior part are formed by bending the absorbent main body into two parts and joining both ends of the first and second exterior parts in the waistline direction to each other so that the waistline part is connected to the upper end part. And a leg opening at the lower end. In the first exterior part and the second exterior part, elastic members such as rubber thread are arranged along the waistline direction in the waistline part. Moreover, the absorptive main body is provided with a leg gather configured by sandwiching an elastic member extending in the front-rear direction at both side edges along the front-rear direction. The leg gather is located at the leg opening when worn.

JP 2006-263306 A

Leg gathers on the inner surface of the absorptive main body, if they are separated from the skin and do not adhere to the skin, create gaps around the legs and cause excrement to leak from the legs.
An object of the present invention is to provide an absorbent article capable of suppressing leakage from around the legs.

An absorbent article for solving the above problems includes a first exterior part and a second exterior part, an absorbent main body, and leg gathers provided at both side edges along the front-rear direction of the absorbent main body. At least one of a 1st exterior part and a 2nd exterior part is provided with the upper area | region which comprises the waist part of the said absorbent article, and the lower area | region located below the said upper area | region. The absorbent main body includes an end region in the front-rear direction that overlaps and adheres to the first exterior portion and the second exterior portion, and a crotch portion positioned between the first exterior portion and the second exterior portion. Have. Each end portion of the leg gather in the front-rear direction includes a first region that overlaps the upper region and a second region that overlaps the lower region. Each leg gather includes at least one elastic member extending in the front-rear direction and a sheet for sandwiching the elastic member, a tip corresponding to each end on both sides in the left-right direction of the absorbent main body, and the absorbent A root portion close to the center line in the left-right direction of the main body. In the first region, a portion from the tip portion to the root portion of the leg gather is bonded to the first exterior portion and / or the second exterior portion, and in the second region, the root portion A portion between any position between the elastic member closest to the base portion and the root portion and the tip portion is not bonded to the first exterior portion and / or the second exterior portion.

The perspective view of the underpants type disposable diaper in 1st Embodiment which materialized the absorptive article of the present invention. (A) is a top view which shows the expansion | deployment state of the underpants type disposable diaper of FIG. 1, (b) is sectional drawing along the 2B-2B line | wire of (a). FIG. 2A is a plan view showing the bonding region of the upper region of the diaper of FIG. 1 corresponding to FIG. 2A, and FIG. 2B is the bonding region of the lower region of the diaper of FIG. The top view shown corresponding to. The principal part sectional drawing of the state with which the diaper of FIG. 1 was mounted | worn. It is a figure which shows the state which extended the absorptive main body of the diaper of FIG. 1 in the width direction, (a) is sectional drawing of the crotch part along the 5A-5A line | wire of FIG. 2 (a), (b) 2C is a cross-sectional view of the lower region along line 5B-5B in FIG. 2A, and FIG. 5C is a cross-sectional view of the upper region along line 5C-5C in FIG. FIG. 5 is a diagram showing a state of the absorbent main body when the diaper of FIG. 1 is worn, in which (a) is a cross-sectional view of the crotch portion along line 5A-5A in FIG. 2 (a), and (b) is FIG. FIG. 5A is a cross-sectional view of a lower region along line 5B-5B in FIG. 5A, and FIG. 5C is a cross-sectional view of an upper region along line 5C-5C in FIG.

With reference to FIG. 1 thru | or 6, the underpants type disposable diaper in one Embodiment which actualized the absorbent article in this invention is demonstrated.
As shown in FIG. 1, a pants-type disposable diaper 10 (hereinafter simply referred to as “diaper 10”) has a front body 10F having a shape that follows the shape of the abdomen of the human body and a shape that follows the shape of the back of the human body. A back body 10R and a crotch 10C connecting the front body 10F and the back body 10R are provided.

The portion of the front body 10F opposite to the crotch 10C constitutes a waistline portion 10W that surrounds the waistline portion of the human body, and is provided with a waistline opening 10A at the upper end. Also, the left and right ends of the front body 10F, the left and right ends of the back body 10R, and the left and right ends of the crotch 10C constitute a pair of left and right leg openings 10L having a shape surrounding the thigh portion of the human body. ing. In addition, the left and right end portions of the front body 10F and the back body 10R in the waist direction are joint portions 11.

FIG. 2 (a) is a plan view showing an unfolded state of the pants-type disposable diaper, and (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 close to the wearer's skin.

The waistline portion 10W in the front body 10F is configured by a ventral side exterior body 12F as a first exterior portion on the abdomen side, and the waistline portion 10W in the rear body 10R is a backside exterior body 12R as a second exterior portion on the back side. It consists of

The ventral-side exterior body 12F and the back-side exterior body 12R have a rectangular shape with the waistline direction as the longitudinal direction. The sheet constituting the outer package is, for example, a nonwoven fabric made of synthetic fibers made from polyethylene, polypropylene, polyester, or other thermoplastic resin, and may be a liquid-permeable sheet or liquid-impermeable sheet. Good. The ventral-side exterior body 12F is configured by sandwiching an abdominal-side upper elastic member 15FU and a ventral-side lower elastic member 15FD between sheets constituting the ventral-side exterior body 12F. The back side exterior body 12R is also configured by sandwiching a back side upper elastic member 15RU and a back side lower elastic member 15RD between sheets constituting the back side exterior body 12R. These elastic members 15FU, 15FD, 15RU, and 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 to each other along the waistline direction.

The abdominal exterior body 12F and the back exterior body 12R are connected by an absorbent main body 16 constituting the crotch 10C. The absorptive main body 16 has a rectangular shape whose longitudinal direction is the front-rear direction. As shown in FIG. 2B, the absorbent main body 16 has a liquid-impermeable back sheet 17, an absorbent body 18, a liquid-permeable top sheet 19, and the back sheet 17. And a cover sheet 20 stacked on the outside. In the diaper 10, the top sheet 19 is disposed on the inner side in contact with the wearer's skin, the back sheet 17 is disposed on the outer side with respect to the absorbent body 18, and the cover sheet 20 is disposed on the outermost side so as to cover the back sheet 17. Placed outside. And in the absorptive main body 16, it has overlapped in order of the cover sheet 20, the back sheet 17, the absorber 18, and the top sheet 19 from the outer side.

The material for forming the back sheet 17 is, for example, a film made of polyethylene resin having liquid impermeability. The back sheet 17 is formed with a large number of fine holes to ensure air permeability. The material which forms the top sheet 19 and the cover sheet 20 is one or more materials selected from a woven fabric, a nonwoven fabric, a porous film, etc., for example. The top sheet 19 is made of, for example, a non-woven fabric having liquid permeability composed of fibers of thermoplastic resin such as polypropylene, polyethylene, polyester, and nylon and subjected to hydrophilic treatment. . Since the cover sheet 20 is the outermost sheet and is a sheet that touches the user, the cover sheet 20 is composed 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 crotch 10C, and the back body 10R. The absorbent body 18 is composed of a molded body of absorbent material and a core wrap that wraps the molded body. The molded body of the absorbent material that forms the absorbent body 18 is obtained by molding an absorbent material such as fluff pulp, a superabsorbent polymer, a hydrophilic sheet, and the like. The core wrap is made of tissue, nonwoven fabric, or the like. The absorber 18 is disposed and joined between the back sheet 17 and the top sheet 19. The absorbent body 18 extends between the ventral-side exterior body 12F and the back-side exterior body 12R, and includes a ventral-side end portion 18F and a back-side end portion 18R. In the absorbent body 18, the core wrap may be omitted.

The back sheet 17, the top sheet 19, and the cover sheet 20 are sheets having a rectangular shape that is slightly larger than the absorber 18, and a central region in which the absorber 18 is disposed and the absorber 18 are disposed. And surrounding area (peripheral part) not included. Both side edge portions extending in the front-rear direction in the absorbent main body 16 are the sheet side edge portions 18A where the absorber 18 does not exist (not arranged). As an example, the sheet side edge portion 18 </ b> A is configured by overlapping a back sheet 17, a top sheet 19, and a cover sheet 20. Further, the sheet side edge portion 18A is configured by folding back both side edge portions extending in the front-rear direction of the cover sheet 20 as an example. Moreover, the inner surface and outer surface of the area | region which overlaps with the exterior bodies 12F and 12R in the front-back direction of the absorptive main body 16 become the edge part area | region 16A to which the sheet | seat which comprises an exterior body is adhere | attached. The end region 16A is both ends of the absorbent main body 16 in the front-rear direction, and includes an abdomen end 18F and a back end 18R of the absorbent body 18, peripheral portions 18B of these ends 18F and 18R, a seat This is a region including the side edge 18A.

The ventral exterior body 12F includes a ventral upper region 12FU and a ventral lower region 12FD. The backside exterior body 12R also includes a backside upper region 12RU and a backside 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 located inside the absorbent main body 16, that is, the top sheet 19 It is arrange | positioned at the side and comprises a part of trunk periphery opening part 10A and trunk part 10W. In the abdominal lower region 12FD and the back lower region 12RD, the abdominal lower elastic member 15FD and the back lower elastic member 15RD are disposed on the outer side with respect to the absorbent main body 16, that is, on the back sheet 17 or the cover sheet 20 side. , Constituting a part of the waistline portion 10W.

In the ventral upper region 12FU, a plurality of ventral upper elastic members 15FU have left and right ends in the waistline direction between the sheets whose longitudinal direction is the waistline direction (between the belly side outer sheet portion 26F and the belly side inner sheet portion 25F). It is arranged in a stretched state over the part. In the back-side upper region 12RU, a plurality of back-side upper elastic members 15RU have a longitudinal direction in the waistline direction between the sheets (between the backside outer seat portion 26R and the backside inner seat portion 25R) in the waistline direction. It arrange | positions in the state extended | stretched over both right-and-left both ends.

Further, in the ventral lower region 12FD, a plurality of ventral lower elastic members 15FD have a longitudinal direction in the waistline direction between the sheets (between the ventral external sheet portion 26F and the ventral internal sheet portion 25F) in the waistline direction. It is arranged across the left and right ends. In the lower back region 12RD, a plurality of lower back elastic members 15RD have a longitudinal direction in the waist direction between the sheets (between the back side outer seat portion 26R and the back side inner seat portion 25R) in the waist direction. It is arranged across the left and right ends. These elastic members 15FU, 15FD, 15RU, and 15RD constitute waist gathers and tammy gathers in the waistline portion 10W, and suppress the occurrence of abdominal and back leaks.

2 (b), the abdominal lower region 12FD and the dorsal lower region 12RD are directly bonded to the cover sheet 20 in the end region 16A of the absorbent main body 16. As shown in FIG. As shown in FIG. 2A, the ventral lower elastic member 15FD is arranged on the end region 16A in an unextended state, for example, a cut state. Further, most of the back-side lower elastic members 15RD are arranged in an unextended state, for example, in a cut state, on the end region 16A. Thereby, the absorptive main body 16 suppresses that the absorptive main body 16 shrink | contracts according to shrinkage | contraction of the abdominal lower elastic member 15FD and the back lower elastic member 15RD, and a pleat is formed in the absorptive main body 16. Can do. And it can suppress that a clearance gap arises between the absorptive main body 16 and skin, and can suppress abdominal leak and back leak.

Among the plurality of back-side lower elastic members 15RD, the plurality of back-side lower elastic members 15RD1 positioned along the lower end of the back-side upper region 12RU near the back-side upper region 12RU are provided on the back side of the absorber 18. On the end 18R, it is arranged in an expanded state, that is, in a state where it is not cut. Therefore, in the region where the back-side lower elastic member 15RD1 is disposed, the pleat 16B can be formed on the back-side end portion 18R. In the back side end portion 18R where the pleats 16B are formed, the absorber 18 is thicker than the region where the pleats 16B are not formed, and the opening end of the back side pocket 30R, which will be described later, is pushed by the buttocks and is not easily blocked. Become. The pleat 16B can function as a guide that leads to the back pocket 30R.

As shown in FIG. 2 (b), the abdominal side upper region 12FU constitutes the abdominal side internal elastic part 27F by sandwiching the abdominal side upper elastic member 15FU between the sheets (the abdominal side external sheet part 26F and the abdominal side internal sheet part 25F). is doing. In addition, the ventral lower region 12FD also forms the ventral external elastic portion 28F by sandwiching the ventral lower elastic member 15FD between the sheets (the ventral external sheet portion 26F and the ventral internal sheet portion 25F). The ventral upper region 12FU and the ventral lower region 12FD are connected in series by the ventral outer sheet portion 26F and the ventral inner sheet portion 25F.

The back-side upper region 12RU constitutes a back-side internal elastic portion 27R by sandwiching the back-side upper elastic member 15RU with a seat (back-side external seat portion 26R and back-side internal seat portion 25R). The back lower region 12RD also forms a back external elastic portion 28R by sandwiching the back lower elastic member 15RD between the seats (the back outer seat portion 26R and the back inner seat portion 25R). The back-side upper region 12RU and the back-side lower region 12RD are connected in series by the back-side outer seat portion 26R and the back-side inner seat portion 25R.

The ventral external sheet portion 26F and the back external sheet portion 26R are positioned on the outermost side opposite to the skin, and are folded inward at the waistline opening 10A and positioned on the most skin side. The ventral inner sheet portion 25F and the dorsal inner sheet portion 25R are sheets facing the ventral outer sheet portion 26F and the dorsal outer sheet portion 26R.

The abdominal side external sheet portion 26F and the abdominal side internal sheet portion 25F constituting the abdominal side internal elastic portion 27F sandwich the abdominal side upper elastic member 15FU and the abdominal side lower elastic member 15FD, and are bonded by the first adhesive 24. ing. The folded-back portions of the abdominal side outer sheet portion 26F and the abdominal side inner sheet portion 25F constitute the waistline opening 10A, and the waistline opening 10A is configured by overlapping two sheets to increase the strength.

The back-side outer seat portion 26R and the back-side inner seat portion 25R constituting the back-side inner elastic portion 27R sandwich the back-side upper elastic member 15RU and the back-side lower elastic member 15RD, and are bonded with the first adhesive 24. ing. The folded-back portions of the back side outer sheet portion 26R and the back side inner sheet portion 25R constitute the waistline opening 10A, and the waistline opening 10A is configured by stacking two sheets to increase the strength.

In the abdominal side internal elastic part 27F and the back side internal elastic part 27R, the abdominal side internal sheet part 25F and the back side internal sheet part 25R adjacent to the abdominal side upper elastic member 15FU and the back side upper elastic member 15RU are end regions 16A. The top sheet 19 is not adhered to the top sheet 19. Further, in the ventral inner elastic portion 27F and the dorsal inner elastic portion 27R, in the region around the end region 16A, the ventral inner sheet portions 25F folded back at the waistline opening 10A are bonded together by the second adhesive 25. Is done. The cover sheet 20 in the end region 16A is also bonded to the ventral inner sheet portion 25F by the second adhesive 25.

Here, FIG. 3 (a) is a plan view showing the bonding region in the upper region corresponding to FIG. 2 (a), and FIG. 3 (b) corresponds to the bonding region in the lower region in FIG. 2 (a). FIG.
As shown in FIGS. 2B and 3A, in the ventral upper region 12FU, the cover sheet 20 in the end region 16A is bonded to the ventral inner sheet portion 25F by the second adhesive 25. The region becomes the first adhesion region 22A. Further, in the back-side upper region 12RU, a region where the cover sheet 20 in the end region 16A is bonded to the back-side inner sheet portion 25R by the second adhesive 25 is a first bonding region 22A.

Further, in the ventral inner elastic portion 27F in the ventral upper region 12FU, the ventral inner sheet portions 25F around the first bonding region 22A and folded back at the waistline opening 10A are bonded together by the second adhesive 25. The region to be formed becomes the second adhesion region 22B. Further, in the back side internal elastic portion 27R in the back side upper region 12RU, the region where the back side internal sheet portions 25R folded back at the waistline opening 10A are bonded by the second adhesive 25 is the second bonding region 22B. Become. The second adhesion region 22B in the abdominal side internal elastic portion 27F and the back side internal elastic portion 27R has a concave shape facing the crotch portion 10C by being positioned around the end region 16A. In the inner part of the concave shape, the abdominal side internal elastic portion 27F and the back side internal elastic portion 27R are non-adhesive portions that are not bonded to the top sheet 19 in the end region 16A. Thereby, a ventral pocket 30F is formed between the ventral inner sheet portion 25F of the ventral inner elastic portion 27F and the top sheet 19 of the end region 16A. Further, a back pocket 30R is formed between the back side internal sheet portion 25R of the back side internal elastic portion 27R and the top sheet 19 of the end region 16A.

These pockets 30F, 30R have an open end on the crotch 10C side, and are configured to accommodate excrement such as urine and feces that move in the direction of the abdomen and back. Further, the second adhesive region 22B includes a blank portion 34 having a predetermined width between the waistline opening 10A and the front and rear end portions of the end region 16A, and excreta contained in the pockets 30F and 30R Leaking toward the waist opening 10A is suppressed.

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 external elastic portion 28F and the dorsal external elastic portion 28R. A region where the portion 25R is bonded to the back sheet 17 in the end region 16A is a third bonding region 22C.

Here, the sizes of the ventral pocket 30F and the back pocket 30R will be described. As shown in FIG. 4, for example, the body shape of an infant has a recessed portion 37 in the crotch portion on the abdomen 36 side, and a buttocks 39 on the back portion 38 side. Therefore, the open end of the abdominal pocket 30F is likely to be in an open state because the crotch portion is depressed, and excrement can easily enter the abdominal pocket 30F. Further, the abdominal pocket 30F tends to flow in a lot of liquid such as urine, and if it is too small, it causes abdominal leakage. Therefore, the abdominal pocket 30F is made large and deep with respect to the back pocket 30R to ensure a sufficient volume for storing excrement such as urine and to prevent the occurrence of abdominal leakage. And when discarding the diaper 10, it accommodates in the ventral pocket 30F in the state where parts other than the ventral pocket 30F were rounded.

Since the back pocket 30R is small and shallow with respect to the abdominal pocket 30F, the open end of the back pocket 30R is not easily blocked by the collar 39.
As shown to Fig.2 (a), the solid gathers 21 are arrange | positioned at the both ends along the front-back direction on the inner surface of the absorptive main body 16, ie, the top sheet 19. As shown in FIG. Each three-dimensional gather 21 is provided with the 1st elastic member 21E extended in the front-back direction of the absorptive main body 16, and the side sheet | seat 21S which pinches | interposes the 1st elastic member 21E. The first elastic member 21E is arranged with respect to the side sheet 21S in a state where a plurality of the first elastic members 21E are parallel to each other and the hot melt adhesive is applied and stretched, and the side sheet 21S is folded in half. It is sandwiched between the side sheets 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 a long sheet body that extends in the front-rear direction including a liquid-impermeable nonwoven fabric, for example.

The side seat 21S has a length straddling the ventral upper region 12FU, the crotch portion 10C, and the dorsal upper region 12RU in the front-rear direction. The first elastic member 21E is shorter than the length in the front-rear direction of the side seat 21S, and has a length straddling the ventral lower region 12FD, the crotch portion 10C, and the dorsal lower region 12RD. Specifically, the front end portion of the first elastic member 21E is between the lower end portion of the ventral lower region 12FD and the upper end portion of the ventral upper region 12FU, and the lower end portion and ventral side of the ventral upper region 12FU. It is located between the end of the lower region 12FD on the crotch 10C side (the lower end of the abdominal lower region 12FD). That is, the front end portion of the first elastic member 21E is located in the ventral lower region 12FD. More specifically, in this example, the front end portion of the first elastic member 21E is located at the end portion on the ventral upper region 12FU side of the ventral lower region 12FD (upper end portion of the ventral lower region 12FD). . The rear end portion of the first elastic member 21E is between the lower end portion of the back-side lower region 12RD and the upper end portion of the back-side upper region 12RU, and the lower end portion and the back side of the back-side upper region 12RU. The lower region 12RD is located between the end portion on the crotch portion 10C side (the lower end portion of the back-side lower region 12RD). That is, the rear end portion of the first elastic member 21E is located in the back lower region 12RD. More specifically, in this example, the rear end portion of the first elastic member 21E is located at the end portion on the back-side upper region 12RU side of the back-side lower region 12RD (the upper end portion of the back-side lower region 12RD). Yes.

As shown in FIG. 5A, in the crotch 10C, the side seat 21S sandwiches the first elastic member 21E in a folded state. Each end portion of the side sheet 21S that is folded and overlapped, that is, the base end portion 21B of the three-dimensional gather 21, is fixed to the sheet side edge portion 18A of the absorbent main body 16 with an adhesive 21A such as a hot melt adhesive. The side sheet 21S sandwiching the first elastic member 21E has a distal end having a shape extending from the base end portion 21B and the left and right end portions (base end portion 21B) of the absorbent main body 16 toward the center line direction in the left and right direction. Part 21P. As described above, the base end portion 21B is bonded to the sheet side edge portion 18A of the absorbent main body 16 with the adhesive 21A. Further, the side seat 21S is folded so that the edge on the center line side in the left-right direction at the base end portion 21B is a folded portion 21T, and the folded portion 21T to the distal end portion 21P are directed to both left and right ends of the absorbent main body 16. It is.

As shown in FIG. 5B, the base end portion 21B of the three-dimensional gather 21 is fixed to the sheet side edge portion 18A of the absorbent main body 16 with the adhesive 21A also in the abdominal lower region 12FD and the back lower region 12RD. The In the crotch portion 10C, the abdominal lower region 12FD, and the back lower region 12RD, the side seat 21S that sandwiches the first elastic member 21E only needs to be able to stand up as a three-dimensional gather 21 in the skin contact direction. The side sheet 21S sandwiching the first elastic member 21E is non-adhered from the tip 21P to the folded portion 21T so that the three-dimensional gather 21 can rise. The side sheet 21S sandwiching the first elastic member 21E can raise the non-adhered portion if at least the first elastic member 21E1 closest to the folded portion 21T from the tip 21P is non-adhered. As the non-bonded portion up to the tip portion 21P is longer, the rising height of the three-dimensional gather 21 becomes higher, and the tip portion 21P can be firmly brought into contact with the skin.

As shown in FIG. 5 (c), 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 21P to the folded portion 21T of the side seat 21S is based. It is fixed to the end portion 21B and the sheet side edge portion 18A by an adhesive 21A to form a seal portion 21C. In addition, the whole area | region from the front-end | tip part 21P of the side sheet 21S to the folding | turning part 21T may be adhere | attached with the 2nd adhesive agent 25 and a series of adhesive agents. Further, the bonding of the base end portion 21B to the sheet side edge portion 18A and the sealing portion 21C may be heat welding.

Further, the sheet 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 to the center side. As shown in FIG. 2A, the folded sheet side edge portion 18 </ b> A includes a leg gather 23. The leg gathers 23 are configured by sandwiching a second elastic member 23E extending in the front-rear direction of the absorbent main body 16 at the sheet side edge 18A. Then, each edge portion of the cover sheet 20 that is folded back and located on the center side is bonded by an adhesive 23C (see FIGS. 5A to 5C). The adhesive 23C is integrated 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 back lower region 12RD via the crotch 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 extended. Extended. Specifically, the front end portion of the second elastic member 23E is between the end portion on the crotch 10C side (the lower end portion of the abdominal lower region 12FD) of the abdominal lower region 12FD and the upper end portion of the abdominal upper region 12FU. In addition, it is located between the lower end of the abdominal upper region 12FU and the end of the abdominal lower region 12FD on the crotch 10C side (lower end of the abdominal lower region 12FD). That is, the front end portion of the second elastic member 23E is located in the ventral lower region 12FD. More specifically, in this example, the front end portion of the second elastic member 23E is positioned at the end portion on the ventral upper region 12FU side of the ventral lower region 12FD (upper end portion of the ventral lower region 12FD). . The rear end portion of the second elastic member 23E is between the end portion on the crotch portion 10C side of the back lower region 12RD (the lower end portion of the back lower region 12RD) and the upper end portion of the back upper region 12RU. In addition, it is located between the lower end portion of the back-side upper region 12RU and the end portion on the crotch portion 10C side of the back-side lower region 12RD (the lower end portion of the back-side lower region 12RD). That is, the rear end portion of the second elastic member 23E is located in the back lower region 12RD. More specifically, in this example, the rear end portion of the second elastic member 23E is located at the end portion on the back-side upper region 12RU side of the back-side lower region 12RD (the upper end portion of the back-side lower region 12RD). Yes. Note that the front end portion and the rear end portion of the second elastic member 23E only need to be located in the upper region 12FU, 12RU or the lower region 12FD, 12RD. In other words, the front end portion and the rear end portion of the second elastic member 23E are the upper end portions of the upper regions 12FU and 12RU and the end portions on the crotch 10C side of the lower regions 12FD and 12RD (lower end portions of the lower regions 12FD and 12RD). It suffices if it is located between. For example, when the front end portion and the rear end portion of the second elastic member 23E are located in the upper regions 12FU, 12RU, the range of the leg gathers 23 can be made wider.

Each end of the leg gather 23 in the front-rear direction overlaps with the ventral upper region 12FU and the ventral lower region 12FD, and the dorsal upper region 12RU and the dorsal lower region 12RD. The region (first region) of the leg gathers 23 that overlaps the ventral upper region 12FU and the back upper region 12RU corresponds to the seat side edge 18A where the second elastic member 23E is not disposed. In the first region overlapping the ventral upper region 12FU and the dorsal upper region 12RU, the end 23P (the left and right ends of the absorbent main body 16) to the root 23Q (the end close to the center line in the left-right direction) ) Are bonded to the sheets (abdominal side inner sheet portion 25F and back side inner sheet portion 25R) constituting the exterior body by the second adhesive 25 (see FIG. 5C).

Further, each end portion in the front-rear direction of the leg gathers 23 includes a region (second region) overlapping with the abdominal lower region 12FD and the dorsal lower region 12RD. The second region of the leg gathers 23 is a sheet that forms the exterior body between the tip 23P (the ends on both the left and right sides of the absorbent main body 16) and the root 23Q (the ends near the center line in the left-right direction). Including parts that are not bonded. In other words, in the second region of the leg gather 23, a portion between any position between the second elastic member 23E1 and the root portion 23Q closest to the root portion 23Q and the tip portion 23P constitutes the exterior body. It is non-adhesive with respect to the sheet (abdominal side internal sheet part 25F and back side internal sheet part 25R). And only the front end portion (the portion including the edge of the cover sheet 20 that is folded back and located on the center side) of the portion that is folded back and located on the center side is the seat (the ventral inner sheet portion 25F and the back inner seat portion 25R). ) With the second adhesive 25 (adhesive 23C) (see FIG. 5B). As described above, at least the sheet from the front end portion 23P of the leg gather 23 to the second elastic member 23E1 closest to the root portion 23Q is the seat (the abdominal side internal seat portion 25F and the back side internal seat portion 25R) constituting the exterior body. On the other hand, it is non-adhesive. Thereby, the leg gather 23 is a sheet (the ventral inner sheet portion 25F and the ventral inner sheet portion 25F) in which the entire region from the distal end portion 23P to the root portion 23Q in the second region overlapping the ventral lower region 12FD and the back lower region 12RD. Compared with the case where it is adhered to the back side inner sheet portion 25R), it can stand up firmly.

In the diaper 10 as described above, the ventral outer sheet portion 26F and the ventral inner sheet portion 25F are provided across the ventral upper region 12FU and the ventral lower region 12FD. The back side outer seat portion 26R and the back side inner seat portion 25R are also provided across the back side upper region 12RU and the back side lower region 12RD. The abdomen outer sheet portion 26F and the abdomen inner sheet portion 25F, the dorsal outer sheet portion 26R and the dorsal inner sheet portion 25R are joined by the joining portion 11. Thereby, also when putting on the diaper 10, it can prevent that a leg approachs into the clearance gap between an upper area | region and a lower area | region, and the diaper 10 becomes difficult to wear.

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

As shown in FIG. 6 (b), the leg gather 23 is not as large as the crotch portion 10C in the abdominal lower region 12FD and the dorsal lower region 12RD, but the leg gathers 23 against the abdominal inner seat portion 25F and the dorsal inner seat portion 25R. It rises in the skin contact direction, and the front end of the sheet side edge 18A contacts the base of the leg. Accordingly, the three-dimensional gather 21 also rises, for example, at an acute angle (V-shape) in the skin contact direction (height direction) with respect to the sheet side edge 18A. The groove 23A between the three-dimensional gather 21 and the leg gather 23 is also formed in the ventral lower region 12FD and the back lower region 12RD continuously from the crotch portion 10C.

As shown in FIG. 6 (c), the second elastic member 23E of the leg gather 23 is not arranged in the abdominal upper region 12FU and the back upper region 12RU, and the seat side edge 18A By contracting the internal elastic portions 27F and 27R, the internal elastic portions 27F and 27R are bent up so as to follow the shape of the abdomen and waist. Further, the first elastic member 21E of the three-dimensional gather 21 is not arranged. The side sheet 21S of the three-dimensional gather 21 that does not include the first elastic member 21E is bonded to the inner surface of the absorbent main body 16 in the entire region that overlaps the ventral upper region 12FU and the back upper region 12RU. Therefore, the three-dimensional gather 21 stands up flexibly with the seat side edge 18A. 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 and the dorsal lower region 12RD, and the leg gather 23 and the three-dimensional gather 21 of the crotch 10C are also firmly raised. Further, the groove 23A disappears not in the abdominal side upper region 12FU and the back side upper region 12RU because the entire region of the side sheet 21S of the three-dimensional gather 21 is bonded to the inner surface of the absorbent main body 16. That is, the end of the groove 23A is the boundary between the upper regions 12FU and 12RU and the lower regions 12FD and 12RD.

As shown in FIG. 6A, in the crotch part 10C, the three-dimensional gather 21 is located on the inner side and the leg gather 23 is located on the outer side. The liquid 23B such as urine, which is excrement, may get over the three-dimensional gather 21 and enter between the three-dimensional gather 21 and the leg gather 23 in the crotch 10C. The liquid 23B between the three-dimensional gather 21 and the leg gather 23 passes along the groove 23A between the three-dimensional gather 21 and the leg gather 23 when the posture of the wearer changes, and the ventral upper region 12FU and the back upper region It flows in the direction of 12RU. Then, in the ventral upper region 12FU and the back upper region 12RU, since the three-dimensional gather 21 is bonded to the seat side edge 18A, the groove 23A is eliminated, and the liquid 23B is absorbed in the pockets 30F and 30R. It will flow in the direction (D1 direction).

As mentioned above, according to the said embodiment, the effect enumerated below can be acquired.
(1) The front body 10F and the back body 10R of the diaper 10 are divided into upper regions 12FU, 12RU and lower regions 12FD, 12RD, respectively, and internal elastic portions 27F, 27R are disposed inside the absorbent main body 16. On the other hand, the external elastic portions 28 </ b> F and 28 </ b> R are disposed outside the absorbent main body 16. Since the diaper 10 of this embodiment is provided with the three-dimensional gather 21 and the leg gather 23, this can suppress the leak from a leg periphery.

(2) The first elastic member 21E of the three-dimensional gather 21 has a front end portion located at an end portion on the abdominal side upper region 12FU side of the abdominal side lower region 12FD and an end on the back side upper region 12RU side of the back side lower region 12RD. And a rear end portion located in the portion. Further, the second elastic member 23E of the leg gather 23 is also provided at the front end portion located at the end portion of the ventral lower region 12FD on the ventral upper region 12FU side and the end portion of the back side lower region 12RD on the back side upper region 12RU side. And a rear end portion located. That is, the range in which the first elastic member 21E and the second elastic member 23E are arranged in the front-rear direction is substantially the same range. Thereby, the three-dimensional gather 21 and the leg gather 23 can be made to function in the range from the crotch 10C to the opening ends of the pockets 30F and 30R, and excrement can be reliably guided in the direction of the pockets 30F and 30R.

(3) In the three-dimensional gather 21, in the ventral upper region 12FU and the dorsal upper region 12RU, the entire region from the front end 21P to the folded portion 21T of the side seat 21S is fixed with an adhesive to form a seal portion 21C. Therefore, in the upper region, when worn, the three-dimensional gather 21 rises with the rise of the seat side edge 18A in which the leg gathers 23 are configured, and further follows the rise to provide the abdominal lower region 12FD and the back lower region. 12RD and the three-dimensional gather 21 of the crotch part 10C can also stand up firmly. Thereby, the leakage from the leg periphery can be suppressed.

(4) In the region (second region) of the leg gather 23 that overlaps the ventral lower region 12FD and the back lower region 12RD, any position between the second elastic member 23E1 and the root portion 23Q closest to the root portion 23Q To the distal end portion 23P is not bonded to the abdominal side inner sheet portion 25F and the back side inner sheet portion 25R constituting the exterior body. Therefore, the leg gathers 23 of the lower regions 12FD and 12RD and the crotch portion 10C are raised by following the rising of both side edges (sheet side edge 18A) extending in the front-rear direction of the absorbent body 16 in the upper regions 12FU and 12RU. Can do. Thereby, the leakage from the leg periphery can be suppressed.

More specifically, the seat side edge portion 18A follows the shape of the abdomen and waist by contracting the inner elastic portions 27F and 27R of the wearer's waist in the abdomen upper region 12FU and the dorsal upper region 12RU. Stand up flexed. Following the rising of the ventral upper region 12FU and the dorsal upper region 12RU, the leg gathers 23 (second regions) in the ventral lower region 12FD and the dorsal lower region 12RD are the tip portions 23P (the left and right ends of the absorbent main body 16). Part) to the root part 23Q (the end part close to the center line in the left-right direction), and includes a non-adhesive part with respect to the ventral inner sheet part 25F and the dorsal inner sheet part 25R constituting the exterior body. It can stand up with respect to the seat part 25F and the back side inner seat part 25R. Thereby, the leakage from the leg periphery can be suppressed.

(5) The liquid 23B that has entered the groove 23A between the three-dimensional gather 21 and the leg gather 23 travels along the groove 23A when the wearer's posture changes, and then the ventral upper region 12FU and the back upper region 12RU. It flows in the direction of. When the 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 (direction D1) in the pockets 30F and 30R. And is absorbed by the absorber 18. Therefore, the liquid 23B that has entered the groove 23A can be prevented from leaking out from the leg gathers 23.

(6) In the ventral upper region 12FU and the dorsal upper region 12RU, the inner elastic portions 27F and 27R are not bonded to the end region 16A of the absorbent main body 16 in the pockets 30F and 30R. The upper elastic member 15FU and the back-side upper elastic member 15RU can freely expand and contract. Therefore, the adhesion between the abdominal upper region 12FU, the back upper region 12RU, and the skin is improved, and the followability to the wearer's movement can be improved. As a result, it is possible to suppress the occurrence of abdominal leakage and back leakage. Further, the expansion and contraction of the abdominal upper elastic member 15FU and the back upper elastic member 15RU is not limited, so that the touch in the abdominal upper region 12FU and the back upper region 12RU can be improved.

(7) Since the abdominal external elastic part 28F and the back external elastic part 28R are further arranged below the abdominal internal elastic part 27F and the back internal elastic part 27R, the waist gathers and tammy gathers are enlarged. The occurrence of abdominal leakage and back leakage can be suppressed.

(8) Since the absorptive main body 16 includes the cover sheet 20 as the outermost sheet, the touch on the outer surface of the crotch part 10C can be improved.
(9) The abdominal pocket 30F is large and deep with respect to the back pocket 30R, and has a sufficient capacity to accommodate excrement such as urine. Therefore, the excrement which flowed to the ventral side can be accommodated reliably, and generation | occurrence | production of abdominal leak can be suppressed. Further, when the diaper 10 is discarded, a portion other than the ventral pocket 30F can be accommodated in a rounded state (baby boom portion) in the ventral pocket 30F, which is the larger pocket.

(10) The ventral outer sheet portion 26F and the ventral inner sheet portion 25F are provided across the ventral upper region 12FU and the ventral lower region 12FD. The back side outer seat portion 26R and the back side inner seat portion 25R are also provided across the back side upper region 12RU and the back side lower region 12RD. The abdomen outer sheet portion 26F and the abdomen inner sheet portion 25F, the dorsal outer sheet portion 26R and the dorsal inner sheet portion 25R are joined by the joining portion 11. Thereby, also when putting on the diaper 10, it can prevent that a leg approachs into the clearance gap between an upper area | region and a lower area | region, and the diaper 10 becomes difficult to wear. Moreover, when discarding the diaper 10, the joining part 11 can be broken and it can remove | separate from a wearer by the operation | work which tears both the abdominal exterior body 12F and the back | dorsal exterior body 12R at both ends of a waistline direction.

In addition, the said embodiment can also be suitably changed 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 back side pocket 30R may be the same as the size of the ventral side pocket 30F, or the back side pocket 30R may be larger than the ventral side pocket 30F.
-It is good also as a structure which abbreviate | omits either the pockets 30F and 30R or both.

· The shape of the pockets 30F, 30R is not particularly limited as long as it can prevent and accommodate the infiltration of excrement. For example, the pockets 30F and 30R may have an Ω shape as a whole with the width of the opening ends of the pockets 30F and 30R narrowed, for example. Thereby, it can suppress that the excrement which entered pockets 30F and 30R returns. In addition, the width of the opening ends of the pockets 30F and 30R may be wider than the side on the waistline opening 10A side.

In the diaper 10, only the upper regions 12FU and 12RU may be elastic portions having elastic members arranged in the waist direction, or only the lower regions 12FD and 12RD may be elastic portions having elastic members arranged in the waist direction. Further, in the configuration opposite to that of the above-described embodiment, the inner elastic portion may be configured in the lower regions 12FD and 12RD, and the outer elastic portion may be configured in the upper regions 12FU and 12RU.

-The sheet | seat which comprises the ventral | abdominal exterior body 12F and the back | dorsal exterior body 12R may be liquid-impermeable, and may be liquid-permeable.
In the diaper 10, when the strength of the waist opening 10 </ b> A can be increased to such an extent that there is no risk of being broken by a single sheet, the ventral inner sheet portion 25 </ b> F and the dorsal inner sheet portion 25 </ b> R are end regions 16A may not be connected in series at an inner position and an outer position. That is, the waistline opening portion 10A may be configured by only the abdominal outer sheet portion 26F and the back outer sheet portion 26R.

The leg gathers 23 are not configured by folding the side edges of the cover sheet 20 and sandwiching the second elastic member 23E between them, for example, both side edges along the front-rear direction of the cover sheet 20 and the back sheet 17 It may be configured such that both side edges along the longitudinal direction of the top sheet 19 are overlapped and the second elastic member 23E is sandwiched therebetween.

-In the diaper 10, the structure in which the three-dimensional gather 21 was abbreviate | omitted may be sufficient.
In the above embodiment, each end of the second elastic member 23E is located at the upper end of the lower region 12FD, 12RD (ie, near the lower end of the upper region 12FU, RU). However, the front end portion and the rear end portion of the second elastic member 23E may be positioned in the upper region 12FU, RU or the lower region 12FD, 12RD as long as the leg gathers 23 are raised, for example, the upper region 12FU, RU. May be located above the end (lower end) on the crotch 10C side, that is, in the upper regions 12FU, RU.

Further, each end portion of the second elastic member 23E may be located in a portion slightly inserted into the crotch portion 10C rather than the end portion on the crotch portion 10C side of the lower regions 12FD and 12RD. That is, each end of the second elastic member 23E may not overlap with the lower regions 12FD and 12RD as long as it is located near the end of the lower regions 12FD and 12RD on the crotch 10C side.

-It is sufficient that at least one of the abdominal exterior body 12F and the back exterior body 12R includes an upper region and a lower region, and only one of the abdominal exterior body 12F and the back exterior body 12R is an upper region. It is good also as a structure provided with an area | region and a lower area | region. In this case, the end portion in the front-rear direction of the leg gather 23 is a region overlapping the upper region, and the ventral exterior body 12R or the rear exterior body 12R having an upper region and a lower region between the tip and the root region. In the region which is bonded to the lower region and overlaps with the lower region, the ventral exterior body 12F or the back side provided with the upper region and the lower region from the tip to the elastic member closest to the root or the position from the root It is not bonded to the exterior body 12R.

The end portion in the front-rear direction of the leg gather 23 is configured to be substantially bonded to the ventral exterior body 12F and / or the back exterior body 12R in the region overlapping the upper region from the tip to the root portion. What is necessary is just to be the structure which makes the intermediate part and front-end | tip between a front-end | tip and a root part non-bonding to the ventral | abdominal exterior body 12F and / or the back | dorsal exterior body 12R.

The absorbent article is not limited to a pant diaper in which the abdominal exterior body 12F and the back exterior body 12R are separated, but is a pant diaper in which the abdominal exterior body and the back exterior body are integrated. Moreover, it is not limited to a pants-type diaper, and may be a tape-type diaper. Moreover, the disposable diaper for adults, such as an elderly person and a disabled person for infants or those who require nursing care, may be used.

Claims (6)

An absorbent article,
A first exterior part and a second exterior part, wherein at least one of these exterior parts includes an upper region constituting a waistline part of the absorbent article and a lower region located below the upper region; 1 exterior part and 2nd exterior part,
An absorbent main body having an end region in the front-rear direction that overlaps and adheres to the first exterior part and the second exterior part, and a crotch part positioned between the first exterior part and the second exterior part; ,
Leg gathers respectively provided at both side edges along the front-rear direction of the absorbent main body, each leg gather having at least one elastic member extending in the front-rear direction, and a sheet sandwiching the elastic member, and With
Each end in the front-rear direction of the leg gather includes a first region overlapping the upper region and a second region overlapping the lower region,
Each leg gather has a tip corresponding to each end on both sides in the left-right direction of the absorbent main body, and a root portion close to a center line in the left-right direction of the absorbent main body,
In the first region, a portion between the tip portion of the leg gather and the root portion is bonded to the first exterior portion and / or the second exterior portion,
In the second region, a portion between any position between the elastic member closest to the root portion and the root portion and the tip portion is the first exterior portion and / or the second exterior portion. Non-adhesive to the part,
Absorbent article. The absorptive article according to claim 1. Each end of the elastic member is located in the upper field or the lower field. The elastic member extends across the lower region of the first exterior part, the crotch part, and the lower region of the second exterior part,
The absorbent article according to claim 2. The upper region includes an internal elastic portion located inside the end region,
The lower region includes an external elastic portion that is located outside the end region and is bonded to an outer surface of the end region;
The internal elastic portion is non-bonded in a region overlapping with the end region, and is bonded to a sheet portion located outside the end region around the end region,
The absorbent article according to any one of claims 1 to 3, wherein a pocket having an open end on the crotch part side is formed between the internal elastic portion and the end region. The absorbent article according to claim 4, wherein a pocket of the first exterior part is larger than a pocket of the second exterior part. The absorbent article according to any one of claims 1 to 5, wherein the upper region and the lower region are configured in series by a sheet portion straddling the upper region and the lower region.

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