JP2012200526A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To turn a distance between an opening and a back sheet member to an appropriate size in an absorbent article.SOLUTION: In the absorbent article 1, between an absorbent sheet member 20 and a back sheet member 23, a front pocket, a rear pocket and a pair of side pockets 28 spreading from an opening 25 are formed. In the absorbent article 1, a pair of weakened areas 236 provided to the back sheet absorber 233 of the back sheet member 23 overlaps a pair of side elastic members 242 of the absorbent sheet member 20 in the plane view. When pockets are formed, since the pair of side elastic members 242 makes contractile force act on the absorbent sheet member 20, the back sheet member 23 is bent in the pair of weakened areas 236 and both sides of the back sheet member 23 are raised. Thus, the distance between the opening 25 and the back sheet member 23 is turned to the appropriate size.

Description

  The present invention relates to an absorbent article that receives excrement from a wearer.

  Conventionally, in absorbent articles such as disposable diapers, when loose stool containing a lot of water is excreted, the loose stool spreads between the wearer and the absorbent article and adheres to the wearer's skin over a wide range. Various proposals have been made to prevent this.

  For example, in the absorbent article of Patent Document 1, an absorbent sheet member having an opening is stacked on the back sheet member, and the front absorbent core, the side absorbent core, the rear absorbent core, and the back sheet member of the absorbent sheet member, Between each of these, a front pocket, a side pocket and a rear pocket are formed in which excrement passing through the opening is accommodated.

JP 2010-279538 A

  By the way, in the absorbent article like patent document 1, the side part of the right-and-left both sides of a back sheet member bends in an appropriate position, and stands to a wearer side, and the opening of an absorptive sheet member, a back sheet member, The distance between is an appropriate size. If the side portion of the back sheet member is bent outside the desired position, the distance between the opening and the back sheet member is reduced, and the capacity of each pocket is reduced. Further, when the side portion of the backsheet member is bent inside the desired position, the distance between the opening and the backsheet member becomes excessively large, and the flat portion at the center in the left-right direction of the backsheet member is also increased. A width | variety becomes small and there exists a possibility that it may become difficult to fix an absorbent article inside exterior articles, such as a disposable diaper.

  This invention is made | formed in view of the said subject, and aims at making the distance between an opening and a back seat | sheet member into an appropriate magnitude | size in an absorbent article.

  Invention of Claim 1 is an absorbent article which receives excrement from a wearer, Comprising: A back sheet member and an outer edge part are joined to the said back sheet member, and it overlaps on the said back sheet member. And an absorbent sheet member that provides an opening through which the back sheet member is exposed at a position facing the crotch portion of the wearer, and the absorbent sheet member is disposed on one of the front side and the rear side of the wearer. An absorbent core, a liquid-permeable core-covering sheet on which the opening is formed and covering the absorbent core, and the core disposed on both sides of the opening in the left-right direction and perpendicular to the left-right direction A pair of side elastic members for applying a contracting force to the covering sheet, and a main pocket extending in the longitudinal direction from the opening is formed between the absorbent core and the back sheet member A pair of side pockets extending laterally from the opening are formed between the absorbent sheet member and the back sheet member on both sides in the left-right direction of the opening, and the back sheet member is A liquid-impervious exterior sheet, and a backsheet absorber disposed on the inner side of the exterior sheet. The backsheet absorber overlaps the pair of side elastic members in a plan view in the longitudinal direction. A pair of weakened regions extending in a linear or belt shape is provided.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said back sheet | seat absorber has a superabsorbent material, and said pair of weakening area | region has a superabsorbent material. It is an area that does not.

  Invention of Claim 3 is an absorbent article of Claim 2, Comprising: In the said backsheet absorber, between the said weakened area | region, the high absorption extended in the said longitudinal direction at linear form or strip | belt shape Other regions in which no functional material is present are further provided.

  Invention of Claim 4 is an absorbent article of Claim 2 or 3, Comprising: The said back seat absorber has a hydrophilic fiber around the said super absorbent material.

  The invention according to claim 5 is the absorbent article according to claim 2 or 3, wherein the back sheet member further includes a liquid-permeable interior sheet facing the absorbent sheet member, An absorptive material is directly fixed by an adhesive between the interior sheet and the exterior sheet.

  A sixth aspect of the present invention is the absorbent article according to any one of the first to fifth aspects, wherein the back sheet member further includes a pair of back sheet elastic members that overlap the pair of weakened regions.

  Invention of Claim 7 is an absorbent article in any one of Claim 1 thru | or 6, Comprising: The said absorbent sheet member is a pair of side part arrange | positioned at the both sides of the said left-right direction of the said opening An absorbent core is further provided, and the pair of side absorbent cores is provided with another pair of weakened regions that overlap the pair of side elastic members.

  Invention of Claim 8 is the absorbent article in any one of Claim 1 thru | or 7, Comprising: In the state before use, both sides are the said weakened area | region, The said absorbent sheet member Are accommodated in an accommodation bag in a state of being folded onto a central region in the left-right direction.

  In the present invention, the distance between the opening and the back sheet member can be set to an appropriate size.

It is a top view of the absorptive article concerning a 1st embodiment. It is sectional drawing of an absorbent article. It is sectional drawing of an absorbent article. It is sectional drawing of an absorbent article. It is sectional drawing of the absorbent article which concerns on 2nd Embodiment.

  FIG. 1 is a plan view showing the absorbent article 1 according to the first embodiment of the present invention in a state where the absorbent article 1 is expanded in the longitudinal direction (that is, the vertical direction in FIG. 1). The absorbent article 1 is an auxiliary absorbent device that is attached to the inside of a disposable diaper or the like that is an exterior article worn by a wearer and receives excrement such as loose stool from the wearer. In FIG. 1, the absorbent article 1 is drawn with the surface in contact with the wearer (that is, the wearer side) facing forward.

  As shown in FIG. 1, the absorbent article 1 includes a substantially sheet-like main body 2 and a left-right direction perpendicular to the longitudinal direction of the main body 2 (the width direction of the main body 2 and the left-right direction in FIG. 2) is provided on both sides of the pair of side sheets 3 that are provided over substantially the entire length in the longitudinal direction. The upper part 201 and the lower part 203 in FIG. 1 of the main body 2 are parts that contact the skin of the wearer's abdomen and dorsal side, respectively. In the following description, “front part 201” and “rear part” Part 203 ". Further, a portion 202 that is continuous between the front portion 201 and the rear portion 203 between the front portion 201 and the rear portion 203 and faces the crotch portion of the wearer is referred to as an “intermediate portion 202”. In the present embodiment, the rear part 203 is the rear part (ie, the lower side in FIG. 1) of the main body part 2 in the longitudinal direction, and the front part is the intermediate part 202 and the front part 201. is there.

  In the absorbent article 1, the main body 2 has a front part 201, an intermediate part 202, and a rear part 203 in order in the longitudinal direction, and the width in the left-right direction of the front part 201 and the rear part 203 is larger than the width of the intermediate part 202. large. In other words, the main body 2 has a so-called hourglass shape in plan view. In the present embodiment, the lateral width of the rear portion 203 is larger than the lateral width of the front portion 201.

  2 and 3 are cross-sections of the absorbent article 1 cut along a plane perpendicular to the longitudinal direction of the absorbent article 1 at the positions AA and BB shown in FIG. FIG. 4 is a cross-sectional view of the absorbent article 1 cut along a plane perpendicular to the left-right direction of the absorbent article 1 at the position C-C. FIG. 2 shows a cross section of the intermediate portion 202 of the absorbent article 1, and FIG. 3 shows a cross section of the rear portion 203 of the absorbent article 1. In the absorbent article 1, the structure of the front part 201 and the structure of the part where the opening 25 of the rear part 203 is not provided are different from the structure of the intermediate part 202 shown in FIG. It is almost the same.

  As shown in FIG. 1 to FIG. 3, the pair of side sheets 3 are respectively a belt-like fixing portion 33 that is joined on the left and right side portions of the main body portion 2, and the inner side in the left-right direction of the fixing portion 33 (that is, the center side). The gathering part 34 which continues to the fixing | fixed part 33, and at least one part stands is provided, and the standing gather part elastic member 32 joined to the gathering part 34 along a longitudinal direction is provided. The side sheet 3 is a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, SMS (spunbond, nonwoven fabric), or the like formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon). The side sheet body 31 which is a melt blown / spun bond) non-woven fabric) is folded in two along a fold line extending in the longitudinal direction, and the standing gather elastic member 32 is sandwiched between the two folded portions. .

  The standing gather portion elastic member 32 is joined to the vicinity of the free end of the gather portion 34. As the standing gather part elastic member 32, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the present embodiment, each standing gather elastic member 32 has two polyurethane yarns.

  The gather part 34 is joined on the main body part 2 at both ends in the longitudinal direction. In the absorbent article 1, when the standing gather elastic member 32 contracts, portions 341 excluding both ends in the longitudinal direction of the gather 34 (hereinafter referred to as “standing gather 341”) are shown in FIGS. 2 and 3. As shown in FIG. 3, a three-dimensional gather is formed that stands on the side of the body portion 2 toward the wearer and abuts near the base of the wearer's foot when worn.

  As shown in FIGS. 1 to 4, the main body 2 is overlapped on the backsheet member 23 and the backsheet member 23 (that is, the wearer side of the backsheet member 23), and the outer edge portion is the backsheet member 23. The absorbent sheet member 20 is provided. As shown in FIGS. 1 and 3, an opening 25 is formed in the rear portion 203 of the absorbent sheet member 20 at a position facing the crotch portion and the hip portion of the wearer. The width in the left-right direction of the opening 25 is smaller than the width of the absorbent article 1. In the present embodiment, the width of the absorbent article 1 in the longitudinal direction is larger than the distance between the free ends of the pair of side sheets 3. small. The backsheet member 23 has an exposed region 230 that is exposed from the opening 25 of the absorbent sheet member 20 and directly faces the wearer's crotch and buttocks. On the left and right sides of the opening 25, a pair of upright gathers 341 extends in the longitudinal direction on the left and right sides of the absorbent sheet member 20.

  As shown in FIG. 1, the absorbent sheet member 20 is disposed on both sides in the left-right direction of the front absorbent core 221 and the opening 25 that are disposed from the wearer's front side (abdomen side) to the crotch portion when the absorbent article 1 is worn. It has a pair of side absorbent cores 222 arranged and a rear absorbent core 223 arranged on the rear side of the wearer. The length in the longitudinal direction of the front absorbent core 221 is larger than the length in the longitudinal direction of the rear absorbent core 223. The front absorbent core 221, the pair of side absorbent cores 222, and the rear absorbent core 223 are integrally formed continuously in the longitudinal direction of the absorbent sheet member 20 (also the longitudinal direction of the back sheet member 23). And surrounds the opening 25.

  In the following description, the front absorbent core 221, the pair of side absorbent cores 222, and the rear absorbent core 223 are collectively referred to as “absorbent core 22”. In FIG. 1, the outline of the absorbent core 22 is drawn with a thick broken line in order to facilitate understanding of the drawing. The width of the absorbent core 22 in the left-right direction at the front part 201 and the rear part 203 is larger than the width of the absorbent core 22 at the intermediate part 202. In other words, the absorption core 22 has a so-called hourglass shape in plan view. In the present embodiment, the width of the absorbent core 22 in the rear portion 203 is larger than the width of the absorbent core 22 in the front portion 201.

  As shown in FIGS. 2 to 4, the absorbent sheet member 20 has an upper surface and a lower surface of the absorbent core 22 (that is, each wearer of the front absorbent core 221, the side absorbent core 222, and the rear absorbent core 223). Side and back sheet member 23 side). The core covering sheet 21 is formed with the opening 25 described above. The core cover sheet 21 includes a first cover sheet 211 that covers the upper surface of the absorbent core 22 and a second cover sheet 212 that covers the lower surface of the absorbent core 22. The second covering sheet 212 includes one nonwoven fabric covering the entire lower surface of the absorbent core 22 and another nonwoven fabric laminated on the one nonwoven fabric below the pair of side absorbent cores 222. The second covering sheet 212 may include a two-layer nonwoven fabric that covers the entire lower surface of the absorbent core 22.

  The absorbent core 22 is obtained by mixing a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber with a superabsorbent material (for example, SAP (Super Absorbent Polymer) or SAF (Super Absorbent Fiber)) with tissue paper or liquid permeability. It is formed by wrapping with a non-woven fabric or the like, and absorbs moisture that has passed through the core covering sheet 21 and quickly fixes it. Tissue paper and liquid-permeable nonwoven fabric wrapping hydrophilic fibers are bonded to the hydrophilic fibers and the water-absorbing polymer with a hot-melt adhesive, and the shape of the hydrophilic fibers is lost and the water-absorbing polymer is dropped (especially, water absorption). Prevent later dropout). In the present embodiment, the absorbent core 22 includes pulp fibers and granular SAP.

  The core covering sheet 21 is a liquid-permeable sheet material that quickly captures the moisture of excrement from the wearer and moves it to the absorbent core 22. As the core covering sheet 21, for example, a liquid-permeable nonwoven fabric (point bond nonwoven fabric or air-through nonwoven fabric) formed of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surface is hydrophilically treated with a surfactant. , Spunbonded nonwoven fabric, etc.). In addition, as the core coating sheet 21, a nonwoven fabric (for example, a spunlace nonwoven fabric) formed of hydrophilic fibers such as cellulose, rayon, or cotton may be used.

  As shown in FIG. 1, the core edge 2211 near the opening 25 of the front absorbent core 221 and the front edge 252 on the front absorbent core 221 side of the opening 25 are concave in the longitudinal direction at the center in the left-right direction. (That is, a concave shape in a direction away from the rear absorbent core 223). Further, the core edge 2231 near the opening 25 of the rear absorbent core 223 and the rear edge 253 on the rear absorbent core 223 side of the opening 25 are also concave in the longitudinal direction at the center in the left-right direction (that is, the front absorbent core 221). A concave portion in a direction away from the concave portion. The core edge 2211 of the front absorbent core 221 and the core edge 2231 of the rear absorbent core 223 may overlap the front edge 252 and the rear edge 253 of the opening 25, respectively. In other words, the core edge 2211 of the front absorbent core 221 and the core edge 2231 of the rear absorbent core 223 may be in contact with the opening 25.

  The absorbent sheet member 20 includes a front absorbent core elastic member 241 joined to the front absorbent core 221 along the longitudinal direction in a central region in the left-right direction. In the absorbent sheet member 20, a contraction force in the longitudinal direction acts on the front absorbent core 221 as the front absorbent core elastic member 241 contracts. The front absorbent core 221 is formed with a slit 2212 extending in the longitudinal direction from the core edge 2211 in the central region (that is, a linear or belt-like region in which no pulp fiber or SAP is present in the front absorbent core 221). The slit 2212 overlaps the front absorbent core elastic member 241. Accordingly, the front absorbent core elastic member 241 is accurately applied to the first cover sheet 211 and the second cover sheet 212 that cover the upper surface and the lower surface of the front absorbent core 221 in the region where the front absorbent core 221 is provided. Joined (see FIG. 2).

  In the front absorbent core 221, the slit 2212 is provided as a linear or belt-like weakened region that is less rigid than the surrounding portion and is easy to bend (that is, has a low resistance to bending). A linear or belt-like weakened region having a lower pulp fiber thickness or a lower density of pulp fiber or the like is provided, and the weakened region is superimposed on the front absorbent core elastic member 241. Good. Also in the rear absorbent core 223, similarly to the front absorbent core 221, a linear or belt-like weakened region such as a slit extending in the longitudinal direction in the center region in the left-right direction, and the rear absorbent core elasticity overlapping the weakened region. A member may be provided.

  As shown in FIGS. 1 and 3, the absorbent sheet member 20 also includes two pairs of side elastic members 242 and 244 arranged along the longitudinal direction on both sides of the opening 25 in the left-right direction. In the following description, the pair of side elastic members 242 located on the inner side in the left-right direction (that is, the central side close to the opening 25) is referred to as “first side elastic member 242”, and the outer side in the left-right direction (that is, The pair of side elastic members 244 located on the side far from the opening 25 are referred to as “second side elastic members 244”. As the first side elastic member 242 and the second side elastic member 244, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the present embodiment, each first side elastic member 242 has two polyurethane yarns, and each second side elastic member 244 also has two polyurethane yarns.

  In the absorbent sheet member 20, when the first side elastic member 242 and the second side elastic member 244 contract, the side absorbent core 222 and the core covering sheet 21 that covers the side absorbent core 222, A contraction force in the longitudinal direction acts. As shown in FIG. 1, the lengths of the first side elastic member 242 and the second side elastic member 244 in the longitudinal direction are the lengths of the side absorbent core 222 in the longitudinal direction, that is, the front absorbent core 221. It is approximately equal to the longitudinal distance between the rear end of the concave portion and the front end of the concave portion of the rear absorbent core 223.

  As shown in FIG. 3, the pair of side absorbent cores 222 includes a pair of slits 2221 that overlap with the pair of first side elastic members 242 and extend along the longitudinal direction (that is, pulp fibers in the side absorbent core 222. Or a linear or belt-like region in which no SAP exists. The first side elastic member 242 is joined between the two layers of nonwoven fabric of the second covering sheet 212 in the region where the side absorbent core 222 is provided.

  In the side absorbent core 222, the slit 2221 is provided as a linear or belt-like weakened region that is less rigid than the surrounding part and is easy to bend (that is, has a low resistance to bending). A linear or belt-like weakened region having a lower pulp fiber thickness or a lower density of pulp fiber or the like is provided, and the weakened region is superimposed on the first side elastic member 242. Good.

  The second side elastic member 244 is disposed on the surface of the side absorbent core 222 that faces the back sheet member 23. The second side elastic member 244 is joined in a stretched state between the two layers of the nonwoven fabric of the second covering sheet 212.

  As shown in FIGS. 2 to 4, the backsheet member 23 is a water-repellent or liquid-impervious exterior sheet 231, and a backsheet disposed inside the exterior sheet 231 (that is, the wearer side of the exterior sheet 231). The interior body 232 which is arrange | positioned inside the absorber 233 and the back seat | sheet absorber 233, and opposes the absorbent sheet member 20 is provided.

  As the exterior sheet 231, a water-repellent or liquid-impervious nonwoven fabric (for example, spunbond nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric) formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon), A water-repellent or liquid-impervious plastic film, or a laminated sheet obtained by laminating these non-woven fabric and plastic film is used, and the moisture etc. of excreta reaching the back sheet member 23 is Prevent exudation. When a plastic film is used for the exterior sheet 231, a plastic film having moisture permeability (breathability) is used from the viewpoint of preventing wear of the absorbent article 1 and improving wearer's comfort. Is preferred.

  The interior sheet 232 is preferably a non-woven fabric (for example, spunlace non-woven fabric) formed of hydrophilic fibers such as cellulose, rayon, or cotton, or a hydrophobic fiber (for example, polypropylene) whose surface is hydrophilically treated with a surfactant. , Polyethylene, polyester, polyamide, and nylon) are used.

  The back sheet absorber 233 includes a substantially sheet-shaped first absorber 234 that faces the interior sheet 232, and a substantially sheet-shaped second absorber 235 that faces the exterior sheet 231 outside the first absorber 234. Prepare. The first absorbent body 234 includes two sheets and a superabsorbent material layer provided between the two sheets. Between the two sheets of the 1st absorber 234, the absorption layer by hydrophilic fibers, such as a ground pulp fiber and a cellulose fiber, is not provided. The superabsorbent material layer is formed by arranging superabsorbent materials in stripes extending in the longitudinal direction and joining the two sheets with a hot melt adhesive or the like. In the present embodiment, SAP is used as the superabsorbent material.

  As shown in FIGS. 2 and 3, in the superabsorbent material layer of the first absorbent body 234, regions 2341 where the superabsorbent material exists and regions 2342 where the superabsorbent material does not exist alternately in the left-right direction. Placed in. Each area | region 2341,3422 is linear or strip | belt shape extended in a longitudinal direction. In the following description, the area 2341 is referred to as “SAP existence area 2341”, and the area 2342 is referred to as “SAP non-existence area 2342”. In FIG. 2 and FIG. 3, for convenience of illustration, the SAP existence region 2341 of the first absorber 234 is indicated by a thick solid line, and the SAP non-existence region 2342 is indicated by a thin solid line.

  The second absorbent body 235 is formed by wrapping pulverized hydrophilic fibers such as pulp fibers and cellulose fibers with tissue paper or a liquid-permeable nonwoven fabric. In the present embodiment, the second absorbent body 235 includes pulp fibers. The second absorbent body 235 is provided with a pair of slits 2351 extending in the longitudinal direction in the vicinity of the left and right side end portions (that is, a linear or belt-like region where there is no pulp fiber). The pair of slits 2351 is a pair of SAP non-existing regions located on the outermost side in the left-right direction among the plurality of SAP non-existing regions 2342 of the first absorbent body 234 (that is, arranged at positions farthest from the center). 2342 overlaps in plan view.

  In the backsheet absorber 233, a linear or belt-like region where the pair of SAP non-existing regions 2342 of the first absorber 234 and the pair of slits 2351 of the second absorber 235 overlap with each other includes a superabsorbent material and a hydrophilic region. This is a region where there is no fiber, and has a pair of weakened regions 236 that are less rigid than the surrounding portions and are easy to bend (that is, have low resistance to bending). Between the pair of weakened areas 236 extending in the longitudinal direction, as described above, the plurality of SAP non-existing areas 2342 arranged in the left-right direction are provided. The weakened region 236 is provided over substantially the entire length of the backsheet absorber 233. In the second absorbent body 235, instead of the slit 2351, a region where the hydrophilic fiber is thinner than the surrounding part or the density of the hydrophilic fiber is low may be provided. Also in this case, a region where the region overlaps with the SAP non-existing region 2342 of the first absorber 234 becomes the weakened region 236.

  The backsheet member 23 further includes a pair of backsheet elastic members 237 extending in the longitudinal direction so as to overlap the pair of weakened regions 236 in plan view. The back sheet elastic member 237 is disposed between the exterior sheet 231 and the second absorbent body 235 and joined to the exterior sheet 231 and the second absorbent body 235. The back sheet elastic member 237 is provided over substantially the entire length of the back sheet absorber 233. When the back sheet elastic member 237 contracts, a contraction force in the longitudinal direction acts on the weakened region 236 and the portion in the vicinity of the weakened region 236 of the back sheet member 23. As the back sheet elastic member 237, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the present embodiment, each backsheet elastic member 237 has one polyurethane thread.

  In the absorbent article 1, as described above, the outer edge portion of the absorbent sheet member 20 is joined to the back sheet member 23, and the surface of the absorbent core 22 facing the back sheet member 23 is not joined to the back sheet member 23. The Thereby, as shown in FIG. 2 and FIG. 4, the portion corresponding to the front absorbent core 221 of the absorbent sheet member 20 and the back sheet member 23 are arranged between the front absorbent core 221 and the back sheet member 23. A front pocket 26 extending from the opening 25 to the front side in the longitudinal direction is formed. Also, as shown in FIG. 3, a pair of side pockets 28 that extend from the opening 25 in the left-right direction are formed between the pair of side absorption cores 222 and the backsheet member 23. Further, as shown in FIG. 4, similarly to the front pocket 26, a rear pocket 27 that extends from the opening 25 to the rear side in the longitudinal direction is formed between the rear absorbent core 223 and the backsheet member 23. A pair of side pockets 28 arranged on both sides in the left-right direction of the opening 25 are continuous with the front pocket 26 and the rear pocket 27.

  In the absorbent article 1 shown in FIG. 1, excrement such as loose stool excreted from the wearer is directed to the back sheet member 23 through the opening 25 and is received in the exposed region 230 of the back sheet member 23. The excrement received in the exposed region 230 moves into the internal space of the front pocket 26, the side pocket 28, and the rear pocket 27 and is accommodated. In the present embodiment, the opening 25 is provided on the rear side of the longitudinal center of the absorbent sheet member 20, and the front absorbent core 221 is longer than the rear absorbent core 223 as described above. . For this reason, the length of the front pocket 26 in the longitudinal direction is larger than the length of the rear pocket 27 in the longitudinal direction, and the front pocket 26 becomes a main pocket mainly containing excrement. In the following description, the front pocket 26, the side pocket 28, and the rear pocket 27 are collectively referred to as “pocket”.

  When pockets are formed in the absorbent article 1, the left and right side portions of the backsheet member 23 are bent and rise to the wearer side, so that the absorbent sheet member 20 is backsheet except for the outer edge portion. Separated from the member 23. In the absorbent article 1, as shown in FIG. 3, when a pocket is formed, a pair of weakened regions 236 provided in the backsheet absorbent 233 is formed on the pair of side elastic members 242 of the absorbent sheet member 20. Overlapping in plan view. Then, when the pair of side elastic members 242 applies a contraction force to the absorbent sheet member 20, the back sheet member 23 in the pair of weakened regions 236 disposed at positions facing the pair of side elastic members 242. Is easily bent, and both side portions of the back sheet member 23 stand up. Thereby, the distance between the opening 25 and the back sheet | seat member 23 can be made into an appropriate magnitude | size. As a result, in the absorbent article 1, the excrement can be reliably accommodated and held in the pocket, and the excrement is prevented from adhering to the wearer's skin over a wide range. Moreover, since the width | variety of the substantially flat site | part between the both sides of the back seat | sheet member 23 can be ensured, the absorbent article 1 can be easily and firmly fixed inside exterior articles, such as a disposable diaper.

  In this way, the absorbent article 1 can reliably contain and hold excrement despite covering only a relatively narrow range of the wearer's skin, so that it is inside the exterior article such as a disposable diaper. It is particularly suitable for auxiliary absorbers that are attached and easily replaceable.

  Since the wearer of the absorbent article 1 often takes a posture such as a supine position, a lateral position or a sitting position, almost no body pressure is applied to the front side of the wearer. In the absorbent article 1, as described above, the front pocket 26 formed between the front absorbent core 221 and the back sheet member 23 arranged on the front side of the wearer mainly stores excrement. A pocket. Therefore, the absorbent article 1 is particularly suitable for accommodating excrement from a wearer who takes various positions such as a supine position, a lateral position or a sitting position.

  In the absorbent article 1, the backsheet member 23 includes the pair of backsheet elastic members 237 that overlap the pair of weakened regions 236, so that it is more easily bent in the weakened region 236. Further, the pair of side absorbent cores 222 is provided with a pair of slits 2221 that overlap the pair of first side elastic members 242, so that the backsheet member 23 is more easily bent in the weakened region 236.

  In the absorbent article 1, in the first absorbent body 234 of the backsheet absorbent body 233, the SAP existence area 2341 and the SAP non-existence area 2342 are alternately arranged in the left-right direction. As a result, even when the SAP absorbs moisture and swells, the moisture can easily reach the longitudinal direction and the second absorber 235 through the SAP non-existing region 2342. In this way, by preventing gel blocking by the first absorbent body 234, moisture can be reliably retained in the backsheet absorbent body 233. Further, among the plurality of SAP non-existing regions 2342, the pair of SAP non-existing regions 2342 located on the outermost side in the left-right direction is used as the weakened region 236, thereby providing the first absorber 234 with a special structure. The back sheet member 23 can be bent at an appropriate position without raising both sides.

  In the backsheet member 23, the backsheet absorbent 233 is formed by laminating the first absorbent 234 including a superabsorbent material inside the second absorbent 235 having hydrophilic fibers. As described above, the backsheet absorbent 233 has hydrophilic fibers around the superabsorbent material, whereby the absorbability of the backsheet member 23 can be increased.

  In the state before use, the absorbent article 1 has both side portions of the absorbent sheet member 20 and the back sheet member 23 on a pair of weakened regions 236 on a central region in the left-right direction of the absorbent sheet member 20. It is accommodated in the accommodation bag in a folded state (that is, a state in which both side portions are folded back to the wearer side by the pair of weakened regions 236). For this reason, when the back sheet member 23 is folded at the position of the pair of weakened regions 236 and a pocket is formed, the back sheet member 23 is more easily bent in the weakened region 236.

  Next, an absorbent article 1a according to a second embodiment of the present invention will be described. FIG. 5 is a cross-sectional view at a position where the opening 25 of the rear portion 203 of the absorbent article 1a is provided, and corresponds to FIG. The absorbent article 1a has the same structure as the absorbent article 1 shown in FIGS. 1 to 4 except that the absorbent article 1a includes a backsheet absorbent 233a having a structure different from that of the backsheet absorbent 233 shown in FIG. In the following description, the same symbol is given to the configuration of the absorbent article 1 a corresponding to each configuration of the absorbent article 1.

  As shown in FIG. 5, the back sheet absorbent body 233 a includes a substantially sheet-shaped first absorbent body 234 and does not include hydrophilic fibers such as pulverized pulp fibers and cellulose fibers. As described above, the first absorbent body 234 includes two sheets and a superabsorbent material joined between the two sheets by a hot melt adhesive or the like. The two sheets of the first absorbent body 234 are in contact with the interior sheet 232 and the exterior sheet 231, respectively, and can be regarded as a part of the interior sheet 232 and the exterior sheet 231. In this case, the superabsorbent material of the first absorbent body 234 is directly fixed to the interior sheet 232 and the exterior sheet 231 with an adhesive such as a hot melt adhesive between the interior sheet 232 and the exterior sheet 231. It can be seen.

  In the backsheet absorbent 233a, the pair of SAP non-existing regions 2342 located on the outermost side in the left-right direction of the first absorbent 234 overlap the pair of side elastic members 242 in plan view when the pocket is formed. Thus, a pair of weakened regions 236 extending in the longitudinal direction in the form of lines or strips are formed. Then, the pair of side elastic members 242 causes the absorptive sheet member 20 to exert a contracting force, so that the back sheet member 23 is easily bent in the pair of weakened regions 236 as in the first embodiment, Both side portions of the back sheet member 23 stand up. Thereby, the distance between the opening 25 and the back sheet | seat member 23 can be made into an appropriate magnitude | size. Further, as described above, the backsheet absorbent 233a does not substantially contain hydrophilic fibers such as pulverized pulp fibers and cellulose fibers, so that when the pocket is formed, the backsheet member 23 is weakened by a pair. It becomes easier to bend in the region 236.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, in the absorbent article 1 according to the first embodiment, the first absorbent body 234 may be omitted from the back sheet absorbent body 233. In this case, the pair of slits 2351 provided in the second absorbent body 235 becomes the pair of weakened regions 236 of the backsheet absorbent body 233. Further, in the back sheet member 23, the interior sheet 232 may be omitted.

  In the back sheet member 23 of the absorbent article 1 according to the first embodiment, the first absorbent body 234 including a superabsorbent material is laminated inside the second absorbent body 235 having hydrophilic fibers. Although the back sheet absorbent body 233 is formed, the first absorbent body 234 may be disposed outside the second absorbent body 235 (that is, between the second absorbent body 235 and the exterior sheet 231). Similarly to the absorbent core 22, the backsheet absorbent 233 may be formed by wrapping a hydrophilic fiber mixed with a superabsorbent material with tissue paper or a liquid-permeable nonwoven fabric. Thus, the backsheet absorber 233 can increase the absorbency of the backsheet member 23 by having pulp around the superabsorbent material.

  In the absorbent article 1a according to the second embodiment, instead of the first absorbent body 234, a superabsorbent material such as SAP is spread on a hot melt adhesive or the like applied on the exterior sheet 231, By stacking the interior sheet 232 inside the exterior sheet 231, and joining the interior sheet 232 and the exterior sheet 231 with the hot melt adhesive or the like, the superabsorbent material is placed between the interior sheet 232 and the exterior sheet 231. It may be directly fixed to.

  In the absorbent article according to the above embodiment, the front absorbent core 221, the pair of side absorbent cores 222, and the rear absorbent core 223 are individually formed and arranged adjacently so as to form the opening 25 ( In other words, the core cover sheet 21 may be covered with the core cover sheet 21 (disposed around the opening of the core cover sheet 21). In addition, the absorbent core 22 does not necessarily include hydrophilic fibers such as pulp fibers, and an absorbent core 22 in which SAP is directly bonded to a nonwoven fabric or a plastic film by a hot melt adhesive or the like may be used.

  In the absorbent article according to the above embodiment, the side absorbent core 222 may be omitted. In this case, the second cover sheet 212 is formed as a single layer throughout, and the first side elastic member 242 and the second side elastic member 244 are the first cover sheet 211 and the second cover sheet of the core cover sheet 21. 212. The first side elastic member 242 and the second side elastic member 244 cause contraction force to act on the core cover sheet 21. The core cover sheet 21 may be a single sheet member that is folded in half. In this case, a portion of the sheet member that covers the wearer side of the absorbent core 22 corresponds to the first cover sheet 211, and a portion of the absorbent core 22 that covers the backsheet member 23 side corresponds to the second cover sheet 212. The core covering sheet 21 only needs to cover at least the wearer side of the absorbent core 22.

  In the absorbent article, it is preferable that a front pocket 26, a side pocket 28, and a rear pocket 27 are provided between the absorbent sheet member 20 and the back sheet member 23 in order to increase the capacity for excrement. . However, if sufficient capacity for excreta is secured, only the front pocket 26 and the pair of side pockets 28 which are main pockets are provided between the absorbent sheet member 20 and the back sheet member 23. The rear pocket 27 may be omitted. When the rear pocket 27 is not provided, a portion of the absorbent sheet member 20 on the rear side of the opening 25 is joined to the back sheet member 23 over substantially the entire surface. In this case, the rear absorbent core 223 may be omitted from the absorbent sheet member 20.

  On the other hand, when the absorbent article is used for a wearer who often takes a body posture where body pressure is easily applied to the front side, such as prone position, the rear part formed between the rear absorbent core 223 and the back sheet member 23 is used. The pocket 27 may be a main pocket. When the rear pocket 27 is a main pocket, the front pocket 26 and the front absorbent core 221 may be omitted. In other words, the absorption core 22 should just be provided with the site | part which is arrange | positioned at least to one side of a wearer's front side and a rear side, and forms a main pocket between the back seat | sheet members 23.

  The shape of the absorbent core 22 and the main body 2 in a plan view is not necessarily an hourglass shape, and may be a substantially rectangular shape, for example. Moreover, what is called a battledore type | mold with the width | variety of only one of a front part and a rear part being large, and the width | variety of the other part and intermediate part may be small may be sufficient.

  The structure of the above-described absorbent article is, for example, a pants-type disposable diaper having a trunk opening at the upper end and a pair of leg openings at the bottom, in addition to the auxiliary absorbent device attached to the inside of the exterior article, The present invention may be applied to a tape-type disposable diaper in which a part that contacts the abdomen side of the wearer and a part that contacts the back side are fastened with a tape member around the waist.

  The configurations in the above-described embodiments and modifications may be combined as appropriate as long as they do not contradict each other.

1, 1a Absorbent article 20 Absorbent sheet member 21 Core covering sheet 22 Absorbing core 23 Back sheet member 25 Opening 26 Front pocket 27 Rear pocket 28 Side pocket 221 Front absorbent core 222 Side absorbent core 223 Rear absorbent core 231 Exterior sheet 232 Interior sheet 233, 233a Back sheet absorber 234 First absorber 235 Second absorber 236 Weakened region 237 Back sheet elastic member 242 First side elastic member 2221 Slit 2342 SAP non-existing region 2351 Slit

Claims (8)

An absorbent article that receives excrement from a wearer,
A backsheet member;
An absorptive sheet member that is provided on a position facing the crotch portion of the wearer by overlapping an outer edge portion of the backsheet member and being joined to the backsheet member by being overlapped on the backsheet member;
With
The absorbent sheet member is
An absorbent core disposed on one of the front and rear sides of the wearer;
A liquid-permeable core covering sheet that forms the opening and covers the absorbent core;
A pair of side elastic members disposed on both sides of the opening in the left-right direction and acting on the core cover sheet in a longitudinal direction perpendicular to the left-right direction;
With
A main pocket extending in the longitudinal direction from the opening is formed between the absorbent core and the backsheet member,
A pair of side pockets extending left and right from the opening are formed between the absorbent sheet member and the back sheet member on both sides of the opening in the left-right direction,
The backsheet member is
A water-repellent or liquid-impervious exterior sheet,
A backsheet absorber disposed inside the exterior sheet;
With
An absorbent article, wherein the backsheet absorbent body is provided with a pair of weakened regions extending in a linear or strip shape in the longitudinal direction so as to overlap the pair of side elastic members in plan view. The absorbent article according to claim 1,
The backsheet absorber comprises a superabsorbent material;
The absorbent article, wherein the pair of weakened areas are areas where no superabsorbent material exists. The absorbent article according to claim 2,
The absorbent article according to claim 1, wherein in the backsheet absorbent body, another region in which a superabsorbent material extending linearly or in the longitudinal direction does not exist is further provided between the pair of weakened regions. The absorbent article according to claim 2 or 3,
The absorbent article, wherein the backsheet absorbent has hydrophilic fibers around the superabsorbent material. The absorbent article according to claim 2 or 3,
The backsheet member further includes a liquid-permeable interior sheet facing the absorbent sheet member;
The absorbent article, wherein the superabsorbent material is directly fixed by an adhesive between the interior sheet and the exterior sheet. The absorbent article according to any one of claims 1 to 5,
The absorbent article, wherein the back sheet member further includes a pair of back sheet elastic members overlapping the pair of weakened regions. The absorbent article according to any one of claims 1 to 6,
The absorbent sheet member further includes a pair of side absorbent cores disposed on both sides of the opening in the left-right direction,
An absorbent article, wherein the pair of side absorbent cores is provided with another pair of weakened regions that overlap the pair of side elastic members. The absorbent article according to any one of claims 1 to 7,
In a state before use, the both side portions are accommodated in the accommodation bag in a state of being folded onto the central region in the left-right direction of the absorbent sheet member in the pair of weakened regions. Absorbent article.

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