JP2012061186A - Underpants-type absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type absorbent article, capable of effectively preventing leak of excrement with enhanced adhesion to a wearer's excretion part by protruding an absorber toward a skin non-contact surface side to easily form a pocket.SOLUTION: The diaper 1 has a ventral portion A, a dorsal portion B and a crotch portion C, and includes a facing body 2 and an absorbent body 3 including an absorber 31. The absorber 31 has a central absorber 311 and a pair of side absorbers 312 disposed symmetrically along both side edges 311d of the central absorber, which are separated at least in the crotch portion C. The central absorber 311 has a dorsal cutout 313 at an end 311b on the dorsal portion B side. The ventral portion A and dorsal portion B in the facing body 2 include a plurality of elastic members 4, and a region where the facing body 2 overlaps with the absorber 31 is not elastic or less elastic than the laterally outer sides of the overlapped region.

Description

  The present invention relates to a pants-type absorbent article such as a disposable diaper.

  As a conventional pants-type absorbent article, a pants-type disposable diaper in which an absorbent body is raised when worn is known in order to enhance the adhesion of the wearer to the excretion part and the heel part.

  For example, in Patent Document 1, an absorbent body of an absorbent article includes a lower layer absorbent body and a plurality of upper layer absorbent bodies, and the lower layer absorbent body has an easily deformable flexible portion, and The upper layer absorbent body is disposed so as to straddle the flexible portion, and the lower layer absorbent body has a narrowest portion at a position corresponding to the crotch portion, and a plurality of substantially narrow longitudinal portions on both sides of the narrowest portion. An absorbent article provided with an elastic elastic member is described.

  In addition, for example, in Patent Document 2, an exterior body provided with a pants-type disposable diaper has a plurality of curved pieces that detour from the one side edge joint portion to the crotch side and reach the other side edge joint portion in the back body. There is described a pant-type disposable diaper that is provided with an elastic elastic member, and in which the absorbent body of the pant-type disposable diaper has a deficient portion deficient in a substantially V shape at the end on the back body side.

JP 2007-167505 A Special table 2008-253289

  However, the absorbent article described in Patent Document 1 and the pants-type disposable diaper described in Patent Document 2 are both formed so that the absorbent body protrudes on the body side (skin contact surface side) when worn. In addition, the absorbent body is not raised so as to form a pocket when worn on the non-skin contact surface side, and it is difficult to effectively prevent leakage of excrement from the excretion part of the wearer.

  Therefore, the subject of this invention is providing the underpants type absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention has a belly side portion disposed on the abdomen side of the wearer at the time of wearing, a back side portion disposed on the back side, a crotch portion disposed between the abdominal side portion and the back side portion, An absorptive body including a longitudinal body in a direction extending from the abdominal side part to the back side part through the crotch part and a lateral direction perpendicular thereto, and including an absorbent body fixed to the inside of the exterior body. A pants-type absorbent article comprising a main body, wherein both side edges located on the abdomen and back sides of the exterior body are joined to form a waist opening and a pair of leg openings The absorber includes a central absorbent portion and a pair of side absorbent portions disposed symmetrically along both side edges of the central absorbent portion, and the central absorbent portion and the pair of side portions Each absorption part is separated at least in the crotch part, and the central absorption part is the back side in the longitudinal direction. It has a dorsal cutout portion that is cut out in a convex shape toward the crotch portion at the end on the side, and extends laterally to each of the ventral side portion and the dorsal side portion of the exterior body. Provided is a pant-type absorbent article having a plurality of elastic members and having no stretchability in a region where the exterior body and the absorbent body overlap, or weaker than a laterally outer side of the overlapped region. Is.

  According to the pant-type absorbent article of the present invention, the absorbent body is raised to the non-skin contact surface side when worn, and it is easy to form a pocket, improving the adhesion to the excretory part of the wearer, and excrement Can be effectively prevented.

FIG. 1 is a perspective view of a pants-type disposable diaper that is an embodiment of the present invention. FIG. 2 is a plan view of the pants-type disposable diaper shown in FIG. 1 as viewed from the top sheet side in an expanded state. FIG. 3 is an enlarged plan view of a main part for explaining the positional relationship between the absorbent body of the pant-type disposable diaper shown in FIG. 2 and the exterior body having an elastic member. Fig.4 (a) is a top view of the absorber with which the underpants type disposable diaper of other embodiment of this invention is equipped, FIG.4 (b) is the underpants type disposable diaper of other embodiment of this invention. It is a top view of an absorber provided.

  Hereinafter, the underpants type absorbent article of the present invention will be described based on its preferred embodiments with reference to FIGS.

  The pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) of the present embodiment includes an exterior body 2 and an absorbent body 31 fixed to the inside of the exterior body 2 as shown in FIGS. And an absorbent main body 3 to be included. As shown in FIGS. 1 and 2, the diaper 1 includes an abdominal side A disposed on the abdomen side of the wearer when worn, a dorsal side B disposed on the back side of the wearer at the time of wearing, and an abdominal side A. And both side edges 2d, 2d located on the ventral side A of the exterior body 2 and both side edges located on the back side B of the exterior body 2 2e and 2e are joined to form a waist opening WO and a pair of leg openings LO and LO. Hereinafter, the diaper 1 will be described in detail.

As shown in FIGS. 1 to 3, the diaper 1 is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.
Moreover, in this specification, the "skin contact surface side" is the surface side arranged on the wearer's skin side when wearing among the front and back surfaces of each member such as the absorbent main body 3, The “abutting surface side” is a surface side of the front and back surfaces of each member such as the absorbent main body that is directed to the side opposite to the wearer's skin side when worn.

  The diaper 1 is also referred to as a longitudinal direction (hereinafter also referred to as “Y direction”) extending from the abdominal side A to the back side B via the crotch C, as shown in FIGS. 1 to 3. Y direction: center line CL And a horizontal direction (hereinafter also referred to as “X direction”) orthogonal to the vertical direction (Y direction). As shown in FIG. 1, the exterior body 2 provided in the diaper 1 configures the appearance of the diaper 1, and as shown in FIG. 2, in the extended state, in the longitudinal direction (Y direction) of the diaper 1 It has a part A, a crotch part C, and a dorsal side part B. The ventral portion A, the dorsal portion B, and the crotch portion C are regions when the overall length in the longitudinal direction (Y direction) is divided into approximately three equal parts in the unfolded diaper 1 shown in FIG.

  As shown in FIG. 2, the exterior body 2 is bound inward at both sides of the central portion in the vertical direction (Y direction). In the diaper 1 of the present embodiment, the inner surfaces of both side edges 2d, 2d on the ventral side A side of the outer package 2 and the inner surfaces of both side edges 2e, 2e on the back side B of the outer package 2 are overlapped with each other. As shown in FIG. 1, a pair of side seal portions 5 and 5 are formed, and a waist opening WO and a pair of leg openings LO and LO are formed by combining and fixing in a palm shape.

  As shown in FIG. 2, the diaper 1 has a plurality of elastic members 4 extending in the lateral direction (X direction) on each of the abdominal side A and the back side B of the exterior body 2. Specifically, the elastic member 4 of the diaper 1 of the present embodiment includes a plurality of waist elastic members 41, a plurality of waistline elastic members 42, and a plurality of leg elastic members 43. In the present embodiment, as shown in FIG. 2, the exterior body 2 includes an outer layer sheet 21 that is the outermost surface of the pants-type disposable diaper 1 on the non-skin contact surface side, and an inner surface side (skin contact) of the outer layer sheet 21. The inner layer sheet 22 is disposed on the contact surface side) and is fixed by adhesive such as hot melt or by fusion such as heat sealing. The outer layer sheet 21 of the present embodiment extends from both outer edges in the longitudinal direction (Y direction) of the inner layer sheet 22, and the extended portions are folded back toward the absorbent main body 3, and are folded back. 21 covers the outer edges of the absorbent main body 3 in the longitudinal direction (Y direction). As shown in FIGS. 1 and 2, a waist elastic member 41, a waist elastic member 42, and a leg elastic member 43, which are elastic members 4, are arranged between the outer layer sheet 21 and the inner layer sheet 22 constituting the exterior body 2. Accordingly, the outer body 2 of the diaper 1 is formed with a waist elastic region (waist gather), a waistline elastic region (waistline gather), and a pair of annular leg elastic regions (leggather).

  As shown in FIGS. 1 and 2, the waist elastic region (waist gather) has a plurality of waist elastic members 41 in a state of extending in the lateral direction (X direction) in each of the abdominal part A and the back part B. Is intermittently disposed in an area from the opening edge of the waist opening WO to 40 mm toward the crotch C, and is fixed to the outer layer sheet 21 or the inner layer sheet 22 of the exterior body 2. Similarly, as shown in FIG. 1 and FIG. 2, the waistline elastic region (the waistline gather) also has a plurality of waistline elasticity in a state of extending in the lateral direction (X direction) in each of the abdominal side A and the back side B. The member 42 is intermittently disposed closer to the crotch C (inward side) than the waist elastic member 41 and is fixed to the outer layer sheet 21 or the inner layer sheet 22 of the exterior body 2. As shown in FIGS. 1 and 2, the leg elastic region (leg gather) has a plurality of leg elastic members in a state of extending along the constriction of the exterior body 2 in each of the abdominal part A and the back part B. 43 are arranged at intervals, and are fixed to the outer layer sheet 21 or the inner layer sheet 22 of the exterior body 2.

  In the diaper 1 of the present invention, there is no stretchability in the region where the outer package 2 and the absorber 31 overlap, or in the lateral direction around the waist, the stretchability is weaker than the region outside the overlap region. For this reason, the effective protrusion to the non-skin surface side can be achieved. Here, "in the lateral direction around the waist, the stretchability is weaker than the region outside the overlapping region" means that the maximum elongation when the waistline region is pulled in the lateral direction from the natural state (relaxed state) ({[ Length at maximum extension−relaxed state length] / relaxed state length} × 100) means that the overlapping region is smaller than the outer region. In the present embodiment, the elastic member 4 of the diaper 1 is not arranged in a state in which stretchability is developed in a region where the exterior body 2 and the absorber 31 overlap. Here, “not arranged in a state that expresses elasticity” not only means a form in which the elastic member 4 is not arranged in the overlapping region, but even if it is arranged in the overlapping region, This also includes the case where each elastic member 4 is finely divided or provided with excessive heat and is no longer stretchable. Specifically, in the diaper 1 of the present embodiment, among the plurality of waistline elastic members 42, the waistline elastic member 42 on the ventral side A located in the region where the exterior body 2 and the absorber 31 overlap is Between the respective side edges of the absorbent body 31 of the absorbent main body 3 and each of the pair of side seal portions 5, it is arranged in a state of extending in the lateral direction (X direction). The waistline elastic member 42 is finely divided and has lost its stretchability. As for the waistline elastic member 42 on the back side B side, each waistline elastic member 42 is finely divided in the region where the exterior body 2 and the absorber 31 overlap in the same manner as the waistline elastic member 42 on the stomach side A side. It is arranged in a state that has lost its elasticity.

  Further, at least in the back side portion B, 50% of the interval L (see FIG. 2) between the longitudinal direction (Y direction) outer edge of the absorbent main body 3 and the longitudinal direction (Y direction) outer edge of the absorbent body 31. It is preferable that the elastic member 4 (the waistline elastic member 42 in the present embodiment) is not disposed in the above region because a flexible protruding shape toward the non-skin surface is easily formed. More preferably, the elastic member 4 (the waistline elastic member 42 in this embodiment) is not disposed. In other words, in the diaper 1 of the present embodiment, the plurality of waistline elastic members 42 are provided in the longitudinal direction (Y direction) outer region and the inward region except the region of 50% or more of the interval L. It is preferable that the region is intermittently arranged.

  Further, as will be described later, when the central absorbent body 311 constituting the absorbent body 31 has not only the dorsal cutout portion 313 but also the ventral cutout portion 314, the ventral portion A also includes the dorsal portion B and Similarly, in the region of 50% or more of the distance L (see FIG. 2) between the longitudinal direction (Y direction) outer edge of the absorbent main body 3 and the longitudinal direction (Y direction) outer edge of the absorbent body 31, an elastic member 4 (the waistline elastic member 42 in the present embodiment) is preferably not disposed, and it is further preferable that the elastic member 4 (the waistline elastic member 42 in the present embodiment) is not disposed in the region of the interval L. preferable.

  As shown in FIG. 2, the absorbent main body 3 fixed to the inside of the exterior body 2 has a substantially vertically long rectangular shape, a liquid-permeable surface sheet 32, a liquid-impermeable (including water repellency). The back surface sheet 33 and the absorber 31 interposed between the both sheets 32 and 33 are provided. Further, as shown in FIG. 2, the absorbent main body 3 is composed of a liquid-resistant or water-repellent and breathable material on both side portions 3d and 3d in the longitudinal direction (Y direction) of the absorbent main body 3. Side cuffs 34, 34 are provided. As shown in FIG. 2, a three-dimensional gather forming elastic member 35 is disposed in the vicinity of the free end of each side cuff 34 in a state of extending in the vertical direction (Y direction). The side cuff 34 stands up at the free end when the diaper is worn and becomes a so-called three-dimensional gather to prevent the body fluid from flowing out in the lateral direction (X direction).

  As shown in FIGS. 2 and 3, the absorbent body 31 provided in the absorbent main body 3 is symmetrically arranged along the central absorbent body 311 as the central absorbent section and the side edges 311 d and 311 d of the central absorbent body 311. The side absorbent bodies 312 and 312 as a pair of side absorbent portions are provided, and the central absorbent body 311 and each of the pair of side absorbent bodies 312 and 312 are separated at least in the crotch portion C. As shown in FIGS. 2 and 3, the central absorbent body 311 has a dorsal cutout that is cut out in a convex shape toward the crotch C at an end 311 b on the dorsal side B in the longitudinal direction (Y direction). Part 313. As shown in FIGS. 2 and 3, the absorbent body 31 includes a central absorbent body 311, a pair of side absorbent bodies 312 and 312, and a water-permeable covering sheet (not shown) made of tissue paper or a water-permeable nonwoven fabric. The center absorbent body 311 and the pair of side absorbent bodies 312 and 312 are entirely covered with a water-permeable covering sheet (not shown).

  As shown in FIG. 2, the central absorbent body 311 has a longitudinal direction (Y direction) of the absorbent main body 3 with a distance L (see FIG. 2) from both outer edges, and the longitudinal direction (Y Direction) from the ventral side A to the dorsal side B. Each interval L is preferably 1 to 300 mm, and more preferably 10 to 260 mm because it is easy to form a raised shape on the non-skin surface side. As shown in FIG. 2, the central absorbent body 311 has a dorsal cutout 313 at an end 311b on the back side B, and in this embodiment, as shown in FIG. Both side corners 311e, 311e are formed in an arc shape.

In the present embodiment, as shown in FIGS. 2 and 3, the back-side notch 313 is formed at the crotch portion at the lateral (X-direction) central portion of the end portion 311 b on the back-side portion B side of the central absorbent body 311. It is cut out in a triangular shape toward C. Accordingly, the central absorbent body 311 is formed in a Y shape on the back side B side as shown in FIGS. 2 and 3 in the present embodiment. Area of cut-out portion is preferably 500～3100Mm ^2, and further preferably from 1000~2600mm ^2. It should be noted that the shape of the dorsal cutout 313 is not triangular but may be semicircular, semielliptical, quadrangular, polygonal, etc. as long as it is cut out to have such an area. Good.

  As described above, in the present embodiment, as shown in FIG. 3, the central absorbent body 311 has both corners 311e and 311e on the back side B side in an arc shape outward in the lateral direction (X direction). Is formed. By carrying out like this, while raising to a non-skin surface side becomes easy to occur and how to hit a wearer's skin becomes soft, it is preferred. The radius of curvature of each corner 311e is preferably 3 to 20 mm, and more preferably 5 to 15 mm.

  Further, in the present embodiment, the central absorbent body 311 is cut in a convex shape toward the crotch C at the end 311a on the ventral side A in the longitudinal direction (Y direction) as shown in FIG. It has a ventral cutout 314 that is cut away. In the present embodiment, as shown in FIG. 2, both corners on the ventral side A side of the central absorbent body 311 are also formed in an arc shape. It is preferable from the same viewpoint that the back side portion B has an arc shape.

In the present embodiment, as shown in FIG. 2, the ventral notch 314 has a lateral direction (X direction) of the end 311 a on the ventral side A side of the central absorbent body 311, as with the back notch 313. The center part is formed by cutting out in a triangular shape toward the crotch part C. Therefore, in the present embodiment, the central absorbent body 311 is formed in a Y shape on the ventral side A side as shown in FIG. Area of cut-out portion is preferably 500～3100Mm ^2, and further preferably from 1000~2200mm ^2. From the viewpoint of leak-proof property, it is better that there is more absorbent material in the ventral part, and particularly in the case of a male sitting posture, the front mole frequency is high, so the area of the ventral notch 314 is larger than that of the dorsal notch 313. It is preferably smaller than the area.
The shape of the ventral cutout 314 is not a triangular shape, as with the dorsal cutout 313, but if it is cut out so as to have such an area, it is semicircular, semielliptical, square It may be a shape, a polygonal shape, or the like.

  As described above, in the present embodiment, as shown in FIG. 2, the central absorbent body 311 has both corners on the ventral side A side as well as the corners 311 e on the back side B side. It is formed in circular arc shape toward the direction (X direction) outward, and the curvature radius of each corner is preferably 3 to 20 mm, and more preferably 5 to 15 mm.

  Each of the pair of side absorbent bodies 312 and 312 is only required to be separated from the central absorbent body 311 at least at the crotch C, but in this embodiment, as shown in FIG. It is separated from the B side to the ventral side A side. More specifically, each side absorbent body 312 is centered not only at the crotch C, but also at the end 312b on the back side B in the longitudinal direction (Y direction) and at the end 312a on the abdominal side A. The absorber 311 is not connected to the absorber 311 and is arranged independently of the central absorber 311.

The length of each side absorber 312 in the vertical direction (Y direction) is 20% to 95%, preferably 60% to 80%, of the length of the central absorber 311 in the vertical direction (Y direction). In addition, the length of each side absorber 312 and the center absorber 311 in the vertical direction (Y direction) is the length at the longest position in the vertical direction (Y direction).
Moreover, it is preferable that each side absorber 312 and the center absorber 311 are arrange | positioned at intervals of 5-40 mm, and it is from a leakproof viewpoint that it arrange | positions at intervals of 10-30 mm. To more preferable. In addition, the space | interval of each side absorber 312 and the center absorber 311 is the length in the narrowest position.

  The absorbent main body 3 has a top sheet 32 and a back sheet 33 so as to sandwich an absorbent body 31 formed by covering a central absorbent body 311 and a pair of side absorbent bodies 312 and 312 with a covering sheet (not shown). Are fixed by an adhesive means such as hot melt, and the part where the pair of side absorbent bodies 312 and 312 and the central absorbent body 311 are separated and the back-side notch 313 are covered sheets. The top sheet 32 and the back sheet 33 are fixed and formed via (not shown). In this embodiment, since the central absorbent body 311 also has the ventral cutout 314, the ventral cutout 314 also has the top sheet 32 and the backsheet 33 via a covering sheet (not shown). Is fixed and formed.

  The absorptive main body 3 is fixed to the inside of the exterior body 2, and in the present embodiment, the end 3b on the back side B and the end 3a on the abdominal side A in the longitudinal direction (Y direction), respectively. , The outer body 2 is fixed over the entire surface in the lateral direction (X direction). More specifically, the absorbent main body 3 has a non-skin contact surface of the back sheet 33 of the absorbent main body 3 and the outer body 2 along the center line CL in the central portion in the lateral direction (X direction) of the outer package 2. The skin contact surface of the inner layer sheet 22 is fixed by an adhesive means such as hot melt. Further, in each of the end portion 3b on the back side B side and the end portion 3a on the abdominal side portion A side in the vertical direction (Y direction), the back surface of the absorbent main body 3 extends over the entire surface in the horizontal direction (X direction). The non-skin contact surface of the sheet 33 and the skin contact surface of the inner layer sheet 22 of the exterior body 2 are fixed by an adhesive means such as hot melt. Therefore, the absorptive main body 3 is fixed to the inside of the exterior body 2 by an adhesive means such as hot melt applied in an I shape.

  In the end 3b on the back side B side of the absorbent main body 3, the region in the vertical direction (Y direction) of the absorbent main body 3 fixed to the exterior body 2 over the entire surface in the horizontal direction (X direction) is: A region from the outer edge in the longitudinal direction (Y direction) of the absorbent main body 3 to the top of the back-side notch 313 of the central absorbent body 311 (top on the crotch C side) is preferable. Further, when the central absorbent body 311 also has the ventral cutout 314 as in the present embodiment, the entire surface in the lateral direction (X direction) also at the end 3 a on the ventral side A side of the absorbent main body 3. The region in the longitudinal direction (Y direction) of the absorbent main body 3 that is fixed to the exterior body 2 extends from the outer edge in the longitudinal direction (Y direction) of the absorbent main body 3 to the ventral side cutout portion of the central absorbent body 311. A region up to the top of 314 (the top on the crotch C side) is preferable.

The forming material of the pants-type disposable diaper 1 of this embodiment is demonstrated.
As the outer layer sheet 21 and the inner layer sheet 22 constituting the exterior body 2, any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 21 and the inner layer sheet 22, a water-repellent nonwoven fabric or the like can be used.

  As the sheets forming the top sheet 32, the back sheet 33, the absorbent body 31 and the side cuffs 34 constituting the absorbent main body 3, respectively, as long as they are usually used for absorbent articles such as disposable diapers, in particular, Can be used without limitation. For example, a hydrophilic and liquid-permeable nonwoven fabric can be used as the top sheet 32, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a nonwoven fabric is used as the back sheet 33. be able to. As the sheet for forming the side cuffs 34, an elastic film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used. As the central absorbent body 311 and the pair of side absorbent bodies 312 and 312 that the absorbent body 31 has, an absorbent core made of absorbent polymer particles and a fiber material can be used.

  A waist elastic member 41 that forms a waist elastic region (waist gather), a waist elastic member 42 that forms a waist elastic region (waist gather), a leg elastic member 43 that forms a leg elastic region (leg gather), and a side cuff 34 As the three-dimensional gather-forming elastic member 35 disposed on each, any member can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, natural rubber, polyurethane, polystyrene- A thread-like stretchable material made of a polyisoprene copolymer, a polystyrene-polybutadiene copolymer, a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.

  For the bonding of the side seal portion 5, an adhesive used for absorbent articles such as disposable diapers, and fusion means such as heat embossing, ultrasonic embossing, and high-frequency embossing are usually used. Similarly, the fixing of the absorbent main body 3 and the exterior body 2 and the fixing of the top sheet 32, the back sheet 33, and the side cuffs 35 are typically adhesives such as hot melt used for absorbent articles such as disposable diapers, Fusing means such as heat embossing, ultrasonic embossing, and high frequency embossing are used.

The effect at the time of using the underpants type disposable diaper 1 (henceforth "diaper 1") which is embodiment of this invention mentioned above is demonstrated.
In the diaper 1 of the present embodiment, as shown in FIGS. 2 and 3, the absorbent body 31 has a central absorbent body 311 and a pair of side absorbent bodies 312 and 312, and the central absorbent body 311 has a longitudinal direction. A back-side notch 313 is provided at an end 311b on the back side B side in the (Y direction). Here, as described above, in the outer package 2 outside the absorbent main body 3, the outer layer sheet 21 and the inner layer sheet 22 sandwich a plurality of elastic members 4, an adhesive such as hot melt, It is fixed by fusion such as heat sealing. Moreover, as above-mentioned, in the back side part B of the absorptive main body 3, the back side notch 313 of the center absorber 311 which the absorber 31 has from the outer edge of the vertical direction (Y direction) of the absorptive main body 3 In the region up to the above, the top sheet 32 and the back sheet 33 are fixed by an adhesive means such as hot melt through a covering sheet (not shown), and the outer layer sheet 21 and the inner layer sheet 22 are adhesive such as hot melt. It is fixed by fusion such as heat sealing. Therefore, in the back side portion B, since the region from the outer edge of the absorbent main body 3 to the back side notch 313 has a larger number of members, the region of the outer package 2 outside the absorbent main body 3 Rigidity becomes higher than. Moreover, in the area | region which goes to the crotch C from the outer edge of the vertical direction (Y direction) of the center absorber 311 which has the back side notch part 313, the absorber 31 (center absorber 311 and a pair of side absorber 312) is used. Therefore, the region has higher rigidity than the region from the outer edge of the absorbent main body 3 to the back-side notch 313. Moreover, in the diaper 1 of this embodiment, as shown in FIGS. 2 and 3, the exterior body 2 has a plurality of pieces extending in the lateral direction (X direction) on the abdominal part A and the back part B, respectively. An elastic member 4 is provided, and the elastic member 4 is arranged in a state of extending in the lateral direction (X direction) between each side edge of the absorbent body 31 of the absorbent main body 3 and each of the pair of side seal portions 5. However, in the area | region where the exterior body 2 and the absorber 31 overlap, it is not distribute | arranged in the state which expresses a stretching property. Therefore, as shown in FIG. 1, the diaper 1 of the present embodiment has an outer package 2 that is more outward than the absorbent main body 3 when the plurality of elastic members 4 contract in the back side B before being mounted. The region from the outer edge of the absorbent main body 3 to the dorsal notch 313, which is higher in rigidity than the region, is likely to rise to the non-skin contact surface side to form a pocket. In the region from the outer edge of the central absorbent body 311 having the dorsal cutout 313 toward the crotch C, the central absorbent 311 and each of the pair of side absorbents 312 and 312 are separated at least in the crotch C. Therefore, when worn, the absorbent body 31 (particularly the central absorbent body 311) is likely to rise to the non-skin contact surface side to form a pocket. Therefore, at the time of wearing, adhesion to the excretion part of the wearer can be improved and leakage of excrement can be effectively prevented.

  In the diaper 1 of the present embodiment, as shown in FIG. 2 and FIG. 3, both corners 311e and 311e on the back side B side of the central absorbent body 311 of the absorbent body 31 are lateral (X direction). It is formed in an arc shape toward the outside. Therefore, the region from the outer edge of the absorbent main body 3 to the dorsal notch 313 easily rises toward the non-skin contact surface side along the arc shape of each of the corner portions 311e and 311e, and further forms a pocket. easy.

  Moreover, as for the diaper 1 of this embodiment, as shown in FIG. 2, a pair of side absorbers 312 and 312 are not only the crotch part C but the edge part of the back side part B side of the vertical direction (Y direction). Neither 312 b nor the end portion 312 a on the ventral side A side is connected to the central absorbent body 311, and is arranged independently of the central absorbent body 311. Therefore, when worn, the central absorbent body 311 is likely to rise to the non-skin contact surface side, and further, a pocket is easily formed.

  In the diaper 1 of the present embodiment, as shown in FIG. 2, the central absorbent body 311 has a ventral cutout 314 at the end on the ventral side A side, and the ventral side of the central absorbent body 311. Both corners on the part A side are also formed in an arc shape. Therefore, the diaper 1 of the present embodiment also has a region from the outer edge of the absorbent main body 3 to the ventral notch 314 due to contraction of the plurality of elastic members 4 even in the ventral side A before being mounted. It is easy to form a pocket by protruding to the non-skin contact surface side. Therefore, at the time of wearing, the adhesion to the excretion part of the wearer can be improved on the back side part B and the abdomen side part A side, and the leakage of excrement can be effectively prevented.

  In addition, as shown in FIG. 2, the diaper 1 of the present embodiment has an absorbent main body 3 in which the end 3b on the back side B and the end 3a on the abdominal side A in the longitudinal direction (Y direction) respectively. , The outer body 2 is fixed over the entire surface in the lateral direction (X direction). Therefore, in the diaper 1 of the present embodiment, the region from the outer edge of the absorbent main body 3 to the dorsal notch 313 is likely to be raised on the non-skin contact surface side, and further a pocket is easily formed. In particular, in the diaper 1 of the present embodiment, as shown in FIG. 2, the plurality of waistline elastic members 42 are arranged in the vertical direction (Y) except for an area of 50% or more of the interval L (see FIG. 2). (Direction) Since the outer region and the inner region are intermittently arranged, the region from the outer edge of the absorbent main body 3 to the dorsal notch 313 is likely to rise to the non-skin contact surface side, Furthermore, it is easy to form a pocket.

  The pants-type disposable diaper that is the pants-type absorbent article of the present invention is not limited to the pants-type disposable diaper of the above-described embodiment, and can be changed as appropriate.

  For example, in the pants-type disposable diaper 1 of the above-described embodiment, as shown in FIG. 2, each side absorbent body 312 is separated from the central absorbent body from the dorsal side B side to the ventral side A side. In addition to the crotch portion C, not only the longitudinal portion (Y direction) of the end portion 312b on the back side portion B side but also the end portion 312a on the ventral side portion A side is connected to the central absorbent body 311. It is arranged independently of the central absorbent body 311, but either the end 312 b on the back side B side or the end 312 a on the ventral side A side is connected to the central absorbent body 311. Alternatively, both of the end 312b on the back side B side and the end 312a on the abdominal side A side may be connected to the central absorbent body 311. For example, each side absorber 312 in the absorber 31 shown in FIG. 4A has an end 312b on the back side B side connected to the central absorber 311 and an end 312a on the ventral side A side. Is not connected to the central absorber 311 and is open. Moreover, each side absorber 312 in the absorber 31 shown in FIG.4 (b) has the edge part 312b by the side of the back side B connected to the center absorber 311, and the edge part 312a by the side of the abdominal side A is provided. Is also connected to the central absorber 311.

  The pant-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Exterior body 2d Side edge part on the abdominal side A side 2e Side edge part on the back side part B side 21 Outer layer sheet 22 Inner layer sheet 3 Absorbent body 3d Longitudinal (Y direction) side part 31 Absorption Body 311 Central absorbent body 311a End portion on the ventral side A side 311b End portion on the back side portion B side 311d Side edge portion 311e Corner portion on the back side portion B side 312 Side absorber 313 Back side cutout portion 314 Ventral cutout portion 32 Top sheet 33 Back sheet 34 Side cuff 35 Elastic member 4 for forming three-dimensional gathers 4 Elastic member 41 Waist elastic member 42 Girth elastic member 43 Leg elastic member 5 Side seal part A Abdominal side part, B Dorsal part, C Inseam CL Centerline extending in the vertical direction of the diaper

Claims (5)

Abdominal side portion disposed on the abdomen side of the wearer at the time of wearing, a dorsal side portion disposed on the dorsal side, a crotch portion disposed between the abdominal side portion and the dorsal side portion; A longitudinal direction in a direction extending from the back to the back through the crotch and a lateral direction perpendicular thereto, and an exterior body, and an absorbent main body including an absorbent body fixed to the inside of the exterior body And each side edge part located in the abdomen side part and the back side part in the exterior body is joined, and it is a pants type absorbent article in which a waist opening part and a pair of leg opening parts were formed,
The absorber has a central absorbent portion and a pair of side absorbent portions symmetrically disposed along both side edges of the central absorbent portion, and the central absorbent portion and the pair of side absorbent portions, respectively. Are separated at least in the crotch,
The central absorbent portion has a dorsal cutout portion that is cut out in a convex shape toward the crotch at the end on the dorsal side in the vertical direction,
Each of the abdominal side and the dorsal side of the exterior body has a plurality of elastic members extending in the lateral direction, and in the region where the exterior body and the absorber overlap, there is no stretchability or A pants-type absorbent article that is less stretchable than the laterally outer side of the overlapping region.   2. The pant-type absorbent article according to claim 1, wherein each of the corner portions on the back side portion of the central absorbent portion is formed in an arc shape.   The pants-type absorbent article according to claim 1 or 2, wherein the central absorbent portion and each of the pair of side absorbent portions are separated from the dorsal side to the ventral side.   The central absorbent portion has an abdominal cutout portion that is cut out in a convex shape toward the crotch portion at an end portion on the ventral side portion in the vertical direction, and both corner portions on the ventral side portion side. The pants-type absorbent article according to any one of claims 1 to 3, wherein is formed in an arc shape.   The said absorptive main body is fixed to the said exterior body over the whole surface of the horizontal direction in each of the edge part of the said back side part side and the said abdominal side part side of the vertical direction. The underpants type absorbent article as described.

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