JP2019118554A - Underpants type absorbent article - Google Patents

Abstract

An object of the present invention is to provide a pant-type absorbent article with improved fit of an absorbent core in the crotch region. An absorbent main body (10) having an absorbent core (11) arranged along the vertical direction and bent back and forth at the lower end in the vertical direction, and positioned at the inseam of the wearer when worn. A pant-type absorbent article (1) having a crotch member (23) having a crotch stretchable region (23s) that is laminated on the non-skin side of the absorbent core (11) at the crotch portion and stretches along the vertical direction. ) And the crotch part of the absorbent core (11) is provided with an inseam low basis weight region (36) having an average basis weight lower than that of the surrounding region, and the inseam low basis weight region ( 36) has a horizontally long portion (36w) along the left-right direction, and at least a part of the horizontally long portion (36w) overlaps with the crotch stretchable region (23s). [Selection] Figure 5

Description

  The present invention relates to a pant-type absorbent article.

  The pant-type absorbent article has an absorbent core that absorbs excrement fluid such as urine. Then, by providing slits or the like in a partial region of the absorbent core to lower the rigidity, the absorbent core is easily bent in the low rigidity portion when the pants-type absorbent article is worn, and the wearer's body is Techniques for facilitating three-dimensional deformation along the line are known. For example, in Patent Document 1, the absorbent core has a block structure including a high basis weight part having a relatively high basis weight and a low basis weight part having a relatively low basis weight, and the block An absorbent article is disclosed which facilitates the absorbent core along the wearer's body by enhancing its flexibility by construction.

JP, 2013-255558, A

  Leg gathers are provided at both ends in the left-right direction of the absorbent main body in the crotch part of a general absorbent article (diaper etc.), and the leg gathers in the wearer's crotch part by the stretchability of the leg gathers. Both ends of the absorbent main body are fitted in the horizontal direction. On the other hand, as in Patent Document 1, in the case of an absorbent core which is easily bent and deformed, a gap is easily formed between the wearer's skin and the central portion in the left and right direction so as to be lifted to the non-skin side. May be That is, while both sides in the left and right direction of the absorbent core easily adhere to the body, the central part is difficult to adhere to the body, so the fit in the crotch region is deteriorated and it is difficult to absorb excrement. There is a risk of Moreover, in patent document 1, since deformation | transformation of an absorptive core is random and deformation | transformation of an absorptive core may not follow a wearer's body movement, there exists a possibility that sufficient fit property may not be obtained in a crotch. .

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a pants-type absorbent article in which the fit of the absorbent core is improved in the crotch region. .

The main invention for achieving the above object has an absorbent core which has vertical directions, horizontal directions, and front-rear directions which cross each other, and is arranged along the vertical directions, and the lower end in the vertical direction. A crotch having an absorbent main body bent back and forth, and a crotch elastic region which is laminated on the non-skin side of the absorbent core in the crotch located in the wearer's crotch at the time of wearing and which extends and contracts along the vertical direction. A pants-type absorbent article having a member, wherein a crotch low basis weight region having a lower average basis weight than the surrounding region is provided in the crotch portion of the absorbent core, The crotch low basis weight region has a laterally long portion along the left-right direction, and at least a part of the laterally long portion overlaps the crotch elastic region, which is a pants-type absorbent article. is there.
Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to provide a pants-type absorbent article in which the fit of the absorbent core is improved in the crotch.

FIG. 1 is a perspective view of a shorts-type disposable diaper 1; It is the schematic plan view which looked at the diaper 1 of the expansion | deployment and the expansion | extension state from the non-skin side. It is a schematic sectional drawing in the II line of FIG. FIG. 4A is a schematic plan view of the absorbent main body 10 in the unfolded and stretched state as viewed from the skin side. FIG. 4B is a cross-sectional view taken along line A-A of FIG. 4A. FIG. 5 is a schematic plan view of the diaper 1 in the unfolded and stretched state, illustrating the positional relationship between the front elastic region 21s of the front belt portion 21 and the crotch elastic region 23s of the crotch member 23 and the absorbent core 11; . It is the top view which looked at the absorptive core 11 from the skin side. It is a schematic perspective view explaining the modification of absorptive core 11 at the time of diaper 1 wear. As a comparative example, it is a schematic sectional drawing showing the deformation state in crotch region 11B of absorptive core 11, when 23 s of crotch elastic regions are not provided. FIG. 18 is a schematic cross-sectional view showing a deformed state in the crotch region 11B of the absorbent core 11 when the crotch elastic region 23s is provided.

At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
The absorbent main body includes: an absorbent core having vertical directions, left and right directions, and front and back directions intersecting with each other, and arranged along the vertical directions; and an absorbent main body bent at the lower end in the vertical direction; A pants-type absorbent article comprising: a crotch member having a crotch elastic region which is laminated on the non-skin side of the absorbent core and which extends and contracts along the vertical direction in a crotch located at the crotch of the wearer at times. A crotch low basis weight region having a lower average basis weight than the surrounding region is provided in the crotch region of the absorbent core, and the crotch lower low basis weight region extends in the left-right direction A pants-type absorbent article comprising a laterally long portion, wherein at least a part of the laterally long portion overlaps with the crotch elastic region.

  According to such a pants-type absorbent article, in the crotch region, the absorbent core is contracted on the non-skin side of the absorbent core along the vertical direction so that the absorbent core is on the wearer's skin side. Be pressed against. At that time, the laterally long portion of the inseam low basis weight region becomes the starting point of bending deformation along the left and right direction of the absorbent core, and the absorbent core adheres to the wearer's crotch while curving according to the wearer's crotch shape Do. Thereby, the fit can be improved in the crotch portion of the absorbent core.

  In the pants-type absorbent article, the crotch low-weight area has a plurality of longitudinally extending portions extending in the vertical direction at intervals in the left-right direction, and the longitudinally extending portions adjacent to each other in the left-right direction Preferably, a crotch high basis weight area having an average basis weight higher than the crotch low basis weight area is provided between the upper and lower directions along the vertical direction.

  According to such a pants-type absorbent article, the crotch-high basis weight region having high basis weight and high rigidity is provided on both sides in the left-right direction of the longitudinally long portion that is likely to become a bending origin. Acts like a joint. Therefore, the absorbent core is likely to be bent and deformed in the longitudinally long portion, and easily fitted to the curved surface of the wearer's body.

  In such a pant-type absorbent article, the absorbent core has a rear side portion which is a portion bent to the rear side in the front-rear direction, and the rear side is more than the crotch low basis weight area in the rear side. It is desirable that a buttock high basis weight area having a higher average basis weight than the crotch low basis weight area is provided on the upper side in the vertical direction.

  According to such a pants-type absorbent article, by providing the buttocks-high basis weight region with high rigidity, it is possible to suppress transmission of the force for deforming the absorbent core from the crotch to the buttocks side. As a result, the absorbent core can be appropriately deformed in the buttock region without being affected by the crotch deformation, and the fit in the buttock is improved.

  In the pants-type absorbent article, the boundary between the crotch low basis weight region and the buttocks high basis weight region is inclined obliquely downward from the center in the left-right direction toward both outer sides. Is desirable.

  According to such a pants-type absorbent article, the region above the buttocks / high basis weight area (rear side) of the absorbent core rises obliquely along the slope of the boundary and wraps the buttocks of the wearer To be transformed. Thereby, the fit of the absorbent core in the buttocks of the wearer can be further improved.

  In the pants-type absorbent article, it is preferable that the crotch low basis weight region is located above the crotch elastic region on the back side.

  According to such a pants-type absorbent article, the stretching force due to the crotch stretch area is blocked by the buttocks high basis weight area, so that it becomes difficult to act on the area above the buttocks high basis weight area. As a result, the natural deformation of the absorbent core on the buttocks side is less likely to be inhibited, and the fit of the absorbent core on the buttocks can be further improved.

  In the pants-type absorbent article, a buttock low basis weight area having a lower average basis weight than the surrounding area is provided on the rear side above the crotch low basis weight area. Is desirable.

  According to such a pants-type absorbent article, the low basis weight regions are respectively provided in the upper region (the buttocks side) and the lower side (the crotch region) with the buttocks high basis weight region interposed therebetween. The absorbent core is easily deformed differently on the buttocks side and the crotch side. Therefore, the absorbent core is likely to fit properly depending on the area.

  Such a pants-type absorbent article, wherein the crotch low basis weight region is a first crotch low basis weight region, and a second crotch low basis weight region located above the first crotch low basis weight region in the vertical direction. The second crotch low basis weight region has a plurality of longitudinally long portions along the vertical direction at intervals in the left and right direction, and of the second crotch low basis weight region, The length between the longitudinally long portion located closest to one side in the lateral direction and the longitudinally long portion located closest to the other side is shorter than the length of the buttock low basis weight region in the lateral direction Is desirable.

  According to such a pants-type absorbent article, the low basis weight region serving as the bending origin is disposed as wide as possible in the region on the buttocks side than the crotch of the absorbent core, thereby along the roundness of the buttocks. A wide range of absorbent cores can be made easy to deform.

  In such a pants-type absorbent article, the first crotch low basis weight region has a plurality of longitudinally long portions along the vertical direction at intervals in the left-right direction, and the first crotch low basis weight region Among them, in the left-right direction, the length between the vertically-long portion positioned closest to one side and the vertically-long portion positioned closest to the other side is the length in the left-right direction of the second crotch low basic weight region. It is desirable that the length is shorter than the length between the longitudinal portion located on the most side and the longitudinal portion located on the other side.

  According to such a pants-type absorbent article, in the second low basis weight region closer to the buttocks than the first low basis weight region in the absorbent core, the low basis weight region serving as a bending starting point is as wide as possible By arranging, the wide range of the absorbent core can be easily deformed along the roundness of the buttocks.

  In the pants-type absorbent article, the absorbent core is disposed along the vertical direction at the rear side, below the vertical direction of the buttocks high basis weight area and at the center of the horizontal direction. Preferably, a central low basis weight area is provided through the

  According to such a pants-type absorbent article, when the absorbent core is sandwiched between the legs in the crotch region of the wearer, the absorbent core extends in the vertical direction starting from the central low basis weight area having the lowest rigidity. It is easy to bend and deform so that it has a convex shape on the skin side. This makes it easier for the absorbent core to fit along the crevices of the wearer's void and buttocks.

  In such a pants-type absorbent article, the absorbent core has a front side portion which is a portion bent to the front side in the front-rear direction, and the front side portion is in the vertical direction more than the crotch low basis weight region. On the upper side of the vertical direction from the upper side to the lower side, and from the outer side to the center side in the left-right direction, there is a pair of inclined low basis weight areas whose basis weight is lower than that of the surrounding area. It is desirable to be provided.

  According to such a pants-type absorbent article, since the inclined low basis weight region obliquely contacts the periphery of the wearer's pubic bone from the crotch to the crotch area, the absorbent core begins to bend along the base of the wearer's leg and Become. As a result, the absorbent core is easily deformed following the movement of the legs of the wearer.

  In the pants-type absorbent article, the length of the crotch elastic region in the left-right direction is shorter than the minimum value of the length of the absorbent core in the left-right direction, and the length of the absorbent core in the left-right direction It is desirable that a crotch-side high basis weight region having an average basis weight higher than the crotch-lower basis weight region is provided at both ends.

  According to such a pants-type absorbent article, the central portion of the absorbent core is convexed by providing the region having a higher basis weight and a higher rigidity than the surroundings at both end portions in the left-right direction of the absorbent core. When it bends like a shape, a convex part is supported from both sides of a horizontal direction, and the shape of a convex part becomes difficult to collapse.

  Such a pants-type absorbent article, comprising: a front belt portion joined to an upper end of the absorbent main body bent to the front side in the front-rear direction; and the absorbent main body bent to the rear side in the front-rear direction It is desirable that a rear belt portion joined to an upper end portion be provided, and the front belt portion and the rear belt portion be joined to each other at both side portions in the left-right direction.

  According to such a pants-type absorbent article, when the type absorbent article is worn, the waist of the wearer is firmly held by the front belt portion and the rear belt portion, and then the absorbent main body is placed on the upper side. Can be pulled up. Thus, the absorbent core is more likely to adhere tightly to the crotch of the wearer.

  In the pants-type absorbent article, the front belt portion has a front stretchable region that stretches in the left-right direction, and the rear belt portion has a rear stretchable region that stretches in the left-right direction. It is desirable that at least a part of the inseam stretchable region overlap the front stretchable region and the rear stretchable region in the vertical direction.

  According to such a pants-type absorbent article, the stretching force of the in-crotch elastic region interlocks with the stretching force of the front-side stretch region and the rear-side stretch region respectively, and the in-crotch stretch region is more easily contracted. Therefore, the absorbent core can be easily pulled up to the crotch side of the wearer, and the fit can be further improved.

=== Embodiments ===
Hereinafter, as a "pants type absorbent article" of the present invention, an embodiment will be described by taking a pants type disposable diaper 1 for adults (hereinafter also referred to as "diaper 1") as an example. However, the pants-type absorbent article of the present invention can also be used as, for example, disposable diapers for children, sanitary products (shorts-type napkins), and the like.
<< Whole composition of diaper 1 >>
FIG. 1 is a schematic perspective view of the diaper 1. FIG. 2 is a schematic plan view of the unfolded and stretched diaper 1 as viewed from the non-skin side. FIG. 3 is a schematic cross-sectional view taken along line I-I of FIG. The “extended state” of the diaper 1 refers to a state in which the diaper 1 is extended without wrinkles, and the dimensions of the members constituting the diaper 1 (for example, the exterior member 20 described later) match the dimensions of the single member Or, it is in a state of being stretched to a length close to that.

  The diaper 1 has an up-down direction, a left-right direction, and a front-back direction intersecting with each other, and has a thickness direction in which the respective members are laminated as shown in FIG. 3. In the vertical direction, the side of the wearer's waist is the upper side, and the side of the wearer's crotch is the lower side. In the front-rear direction, the front side of the wearer is referred to as the front side, and the back side of the wearer is referred to as the back side. In the thickness direction, the side in contact with the body of the wearer is the skin side, and the other side is the non-skin side. Moreover, in the unfolded state of FIG. 2, the diaper 1 has the longitudinal direction and width direction which mutually cross | intersect. The longitudinal direction is a direction along the vertical direction, and the width direction is the same as the lateral direction.

  The diaper 1 has the absorptive main body 10 which is rectangular shape planar view, and the exterior member 20 located in the non-skin side of the absorptive main body 10. As shown in FIG. The exterior member 20 includes a belly-side exterior member 21 (front belt portion 21) positioned on the front side in the front-rear direction in FIG. 1 and a back-side exterior member 22 (rear belt portion 22) positioned on the rear side in the front-rear direction. And a crotch exterior member 23 (crotch member 23) connecting them. The above members adjacent in the thickness direction are joined by an adhesive or the like.

  Further, the front side belt portion 21 is positioned at one end side in the longitudinal direction of the absorbent main body 10, and the rear side belt portion 22 is positioned at the other end side in the longitudinal direction of the absorbent main body 10. In the longitudinal direction of the absorbent main body 10, the side on which the front belt portion 21 is positioned is referred to as the front side, and the side on which the rear belt portion 22 is positioned is referred to as the rear side. That is, the front side belt portion 21 is located at the front upper end portion of the absorbent main body 10, and the rear side belt portion 22 is located at the rear upper end portion of the absorbent main body 10. Further, the crotch member 23 is positioned closer to the skin than the front side belt portion 21 and the rear side belt portion 22.

  In addition, although the exterior member 20 is comprised by three members in the diapar 1 of this embodiment, it does not restrict to this. For example, the front belt portion 21, the rear belt portion 22, and the crotch member 23 may be one member. In addition, a configuration without the crotch member 23 or a configuration in which a member different from the exterior member 20 is further laminated on the non-skin side of the exterior member 20 may be used.

  In the diaper 1 in the unfolded state shown in FIG. 2, the absorbent main body 10 is folded back and forth at a predetermined position CL in the longitudinal direction, and both sides in the lateral direction of the front belt portion 21 and both sides in the lateral direction of the rear belt portion 22 The parts are joined by welding or the like to form the pants-type shown in FIG. That is, the longitudinal direction of the absorbent main body 10 is along the vertical direction of the diaper 1, and the front belt portion 21 and the rear belt portion 22 are annularly connected to form the waist opening 1a and the pair of leg openings 1b. Hereinafter, a region where the front belt portion 21 and the rear belt portion 22 are joined is referred to as an end joint region 24.

  Further, in the present specification, of the absorbent main body 10 (absorbent core 11) bent at the predetermined position CL, a portion bent to the front side is referred to as “front side portion 10F”, and a portion bent to the rear side It is referred to as "the rear side 10R". That is, in the longitudinal direction of FIG. 2, the area on the front side of the predetermined position CL of the absorbent main body 10 (the absorbent core 11) is called “front side 10 F”, and the area on the rear side of the predetermined position CL is “rear side It may be called "part 10R".

  As shown in FIG. 3, the absorbent main body 10 includes an absorbent core 11, a top sheet 12 positioned on the skin side of the absorbent core 11, and a back sheet 13 positioned on the non-skin side of the absorbent core 11. Have. FIG. 4A is a schematic plan view of the absorbent main body 10 in the unfolded and stretched state as viewed from the skin side. FIG. 4B is a cross-sectional view taken along line A-A of FIG. 4A. In FIG. 4B, the low basis weight region (described later) provided in the absorbent core 11 is not displayed for simplification of the description.

  The absorbent core 11 is a member that absorbs and holds excretory fluid such as urine, and is formed of, for example, a liquid absorbent fiber such as pulp fiber mixed with a superabsorbent polymer (SAP). The absorbent core 11 of the present embodiment has a narrowed portion 11 c having a narrow width in the left-right direction between the front end and the rear end in the longitudinal direction, and the plan view as shown in FIG. 4A It has a substantially hourglass shape. In addition, various low basis weight regions, which are regions in which the basis weight is lower than that of the surrounding, are formed in the absorbent core 11. Details of the low basis weight region will be described later. In addition, the outer peripheral surface of the absorbent core 11 may be covered by a liquid-permeable sheet such as tissue paper or non-woven fabric.

  The top sheet 12 is a liquid-permeable sheet, and for example, a hydrophilic air through non-woven fabric or a spun-bonded non-woven fabric is used. The back sheet 13 has a two-layer structure of a liquid impermeable sheet 13a and a hydrophobic sheet 13b disposed on the non-skin side. As the liquid impermeable sheet 13a, for example, a resin film or the like is used, and as the hydrophobic sheet 13b, for example, a hydrophobic non-woven fabric having flexibility is used. The back sheet 13 may have a single layer structure of the liquid impermeable sheet 13a.

  Side sheets 14 are provided on both sides of the back sheet 13 in the left-right direction. The side sheet 14 extends outward in the left-right direction from both ends 11 es, 11 es in the left-right direction of the absorbent core 11, and with the both ends 10 es, 10 es in the left-right direction of the absorbent main body 10 folded back A pair of leakproof walls 40 are formed by being folded back to the skin side in the longitudinal direction. Leakproof wall elastic members 41 and 42 such as thread rubber are fixed to the leakproof wall portion 40 in a state of being extended along the longitudinal direction (vertical direction) of the absorbent main body 10. When the leak preventing wall elastic members 41 and 42 are contracted in the longitudinal direction, the pair of the leak preventing wall portions 40 rise to the skin side at both ends in the left and right direction of the absorbent main body 10. Act as a side gather). Alternatively, the leakproof wall portion 40 may be formed by extending the back sheet 13 (liquid permeable sheet 13 b) to the outside in the left-right direction of the absorbent core 11 without providing the side sheet 14. .

  The front side belt portion 21 and the rear side belt portion 22 are, as shown in FIG. 2, respectively, in a waistline area 211, 221 where the end joint area 24 is located in the vertical direction and a lower side than the waistline area 211, 221 The crotch region 212, 222 is provided. The waistline regions 211 and 221 have a rectangular shape in plan view. The crotch region 212, 222 has a substantially trapezoidal shape, and the outer edge portion has inclined portions 212s, 222s that are inclined inward in the left-right direction toward the lower side in the up-down direction. That is, the crotch region 212, 222 has a narrower width toward the lower side. Further, in the present embodiment, the crotch-side region 222 of the back side belt portion 22 is larger than the crotch-side region 212 of the front side belt portion 21 so that the buttocks of the wearer can be widely covered.

  The front side belt portion 21 and the rear side belt portion 22 are, as shown in FIG. 3, respectively, skin side sheets 213 and 223 located on the skin side, and non-skin side sheets 214 and 224 located on the non-skin side. It has an elastic nonwoven fabric 215, 225 which is located between them and has elasticity at least in the left-right direction of the diaper 1.

  The skin side sheets 213 and 223 and the non-skin side sheets 214 and 224 are preferably flexible sheets, and for example, a spunbond nonwoven fabric or an SMS nonwoven fabric is used.

  The stretchable non-woven fabric 215, 225 has, for example, a polyurethane elastomer which is a thermoplastic elastomer fiber having elasticity, and a polypropylene (PP) of a polyolefin resin which is a thermoplastic resin fiber having non-elasticity. And non-woven fabric that has been subjected to an appropriate stretching process such as gear stretching. By this stretching process, the stretchable nonwoven fabrics 215, 225 have stretchability in a predetermined direction. The stretching may be performed in directions orthogonal to each other, or may be performed only in a predetermined direction. When stretching is performed only in a predetermined direction, stretchability in a predetermined direction is expressed, but since all fibers are not necessarily oriented along the predetermined direction, stretchability in the direction orthogonal to the predetermined direction is also possible. Is expressed.

  The skin side sheets 213 and 223, the non-skin side sheets 214 and 224, and the stretchable non-woven fabric 215 and 225 are joined by a plurality of scattered portions 25a and 25b (for example, a region to which ultrasonic welding is performed) For example, compared with the case where it joins by the adhesive which hardens | cures, the touch is softened. In addition, the elastic non-woven fabric 215, 225 shrinks between the welded portions 25a, 25b, causing the skin side sheets 213, 223 and the non-skin side sheets 214, 224 to curve and protrude outward in the thickness direction. Do. That is, since the skin side sheets 213 and 223 and the non-skin side sheets 214 and 224 swell between the welded portions 25a and 25b, the touch becomes softer and it is possible to give the user a visually soft impression.

  With such a configuration, the front belt portion 21 and the rear belt portion 22 have stretchability in the left-right direction (and the vertical direction) of the diaper 1 as a whole. An area in the front belt portion 21 that exhibits elasticity in the left-right direction is referred to as a front elastic area 21s, and an area in the rear belt unit 22 that expresses elasticity in the left-right direction is referred to as a rear elastic area 22s (see FIG. See the shaded area of 5). Moreover, welding part 25a, 25b is dotted at comparatively narrow intervals as shown in FIG. Therefore, in the diaper 1 of this embodiment, since it extends in many directions and fine swelling (wrinkle) occurs, and generation of one-way wrinkles (longitudinal wrinkle etc.) peculiar to the diaper can be prevented. Aesthetic is good.

  In addition, you may use an elastic film instead of the elastic nonwoven fabric 215,225. However, since the thickness of the stretchable film is substantially uniform, the swelling of the skin side sheets 213 and 223 and the non-skin side sheets 214 and 224 between the welded portions 25a and 25b is easily crushed. On the other hand, since the thickness of the stretchable non-woven fabric 215, 225 is increased between the welded portions 25a, 25b, the swelling of the skin side sheets 213, 223 and the non-skin side sheets 214, 224 is hardly crushed, and the softness and beauty of the touch You can keep the sex.

  Further, in the area where the welded portions 25a and 25b are scattered, the welded portions 25a and 25b are formed in the first dotted area X overlapping in the thickness direction with the absorbent main body 10 and the second dotted area Y other than that. Alternatively, the ratio of the welded portions 25a and 25b per unit area may be made different. In FIG. 2, in the first dotted region X, substantially rectangular welds 25 a inclined 45 degrees or −45 degrees with respect to the left-right direction are alternately arranged. On the other hand, in the second dotted area Y, circular welds 25b are arranged in a zigzag.

  Further, the area of the welded portion 25b per unit area is smaller in the second dotted area Y than in the first dotted area X. Therefore, in the waistline regions 211 and 221 where problems such as sweat and stuffy are likely to occur, it is possible to suppress the air permeability from being hindered by the welded portion 25 b, and it is possible to ensure appropriate air permeability. On the other hand, in the first dotted region X overlapping the absorbent main body 10, the contraction of the front belt portion 21 and the rear belt portion 22 can be appropriately suppressed, and the contraction of the absorbent main body 10 in the left-right direction can be reduced.

  Further, in the front belt portion 21 and the rear belt portion 22, a plurality of waist elastic members 26 such as thread rubber are disposed in a region along the waist opening 1a. Similarly, a plurality of leg elastics 27 such as thread rubber are disposed in a region along the leg openings 1b. That is, since the waist elastic members 26 and the leg elastic members 27 firmly adhere to the body of the wearer by the waist elastic members 26 and the leg elastics 27, the diaper 1 can be prevented from slipping off or leaking from the legs. On the other hand, since the other portions gently fit the wearer's body over the entire surface by the stretchable nonwoven fabric 215, 225, the feeling of tightening is reduced.

  The crotch member 23 has a substantially hourglass shape in plan view curved inward in the left-right direction at a central portion in the longitudinal direction. Further, as shown in FIG. 3, the crotch member 23 is positioned between the skin side sheet 231 located on the skin side and the non-skin side sheet 232 located on the non-skin side, and the up-down direction of the diaper 1. The stretchable non-woven fabric 233 which imparts stretchability to (the longitudinal direction of the absorbent main body 10) is provided. These sheets 231 to 233 are joined by a plurality of welds (for example, the weld 25 b similar to the second dotted area Y). In the crotch member 23, a region in which stretchability along the up and down direction is expressed is taken as a crotch stretch region 23s (see the hatched portion in FIG. 5).

  By providing the inseam elastic region 23s, the absorbent core 11 can be in close contact with the crotch of the wearer, and the drooping of the diaper 1 can be suppressed even if the weight of the absorbent core 11 increases due to excretion. A plurality of crotch elastic members 28 are disposed in a region along the leg opening 1b of the crotch member 23, and the crotch member 23 is in close contact with the wearer's leg.

<< On deformation of absorbent core 11 >>
When wearing the diaper 1, a mode that the absorptive core 11 (absorbent main part 10) deform | transforms according to a wearer's body shape is demonstrated.

  FIG. 5 is a schematic plan view of the diaper 1 in the unfolded and stretched state, and explains the positional relationship between the front elastic region 21s of the front belt portion 21, the crotch elastic region 23s of the crotch member 23, and the absorbent core 11. It is a figure to do. FIG. 6 is a plan view of the absorbent core 11 as viewed from the skin side.

  As shown in FIG. 5, the absorbent core 11 includes “lower abdomen position 11A” located in the lower abdomen of the wearer when worn, “crotch site 11B” located in the crotch region of the wearer, and the buttocks of the wearer And “the heel region 11C” located at In FIG. 5, the portion overlapping the front belt portion 21 is a lower abdomen position 11A, the portion overlapping the rear belt portion 22 is a heel portion 11C, and the in-between portion is a crotch portion 11B. That is, the lower abdomen position 11A is a portion located on the front side portion 10F of the diaper 1, and the heel portion 11C is a portion located on the back side portion 10R of the diaper 1. The crotch region 11B is located at the lower end of the pants-shaped diaper 1 in the vertical direction, and is a region provided over the front position 10F and the rear side 10R across the predetermined position CL.

  However, the range of "crotch region 11B" shown in FIG. 5 is an example, and is not limited to this. For example, even when the area from the lower end of the end joint area 24 of the front belt portion 21 to the lower end of the end joint area 24 of the rear belt portion 22 in the longitudinal direction is 1/3, good.

  Absorbent core 11 has "crotch low basis weight region 36" which is a region where basis weight of absorbent core 11 becomes lower than crotch area 11B. The crotch low basis weight region 36 is formed by the intersection of a vertically long portion 36l along the vertical direction (longitudinal direction of the absorbent core) and a horizontally long portion 36w along the lateral direction (width direction of the absorbent core). ing. A plurality of vertically long portions 36l are provided at intervals in the left-right direction at the crotch region 11B, and a plurality of horizontally long portions 36w are provided at intervals in the vertical direction on each of the vertically long portions 36l.

Here, the “basis weight” of the absorbent core 11 is the mass (g / m ² ) of the absorbent core 11 per unit area (for example, a liquid absorbent fiber mixed with SAP). The comparison of the basis weight of the absorbent core 11 between the inseam low basis weight region 36 and the periphery may be performed by a known method. For example, there is a method of comparing visually. In addition, there is a method in which the target site is cut out from the absorbent core 11 as a sample, the mass of each sample and the area of each sample are measured, and the mass per unit area is calculated and compared. The same applies to the other low basis weight regions described below.

  The absorbent core 11 is easily bent starting from the crotch low basis weight region 36 due to the difference in rigidity between the crotch low basis weight region 36 and the periphery. Therefore, when the diaper 1 is worn, the absorbent core 11 is easily deformed to conform to the unevenness of the wearer's body by bending from the crotch low basis weight region 36, and it becomes easy to fit the wearer's body . In particular, the crotch region 11 </ b> B is a region that is susceptible to compressive force in the left-right direction by being sandwiched between the legs of the wearer when the diaper 1 is worn. In the present embodiment, the absorbent core 11 is flexibly deformed by providing the longitudinally long portion 36l extending along the vertical direction in the crotch region 11B and the horizontally long portion 36w extending along the lateral direction so as to intersect with each other. Can.

  Further, as shown in FIG. 6, the absorbent core 11 is more absorbent than the crotch low basis weight region 36 on the upper side in the vertical direction and on the rear side (rear side portion 10R) in the front and rear direction as compared to the surroundings. It has a “second crotch low basis weight region 37” which is a region where the basis weight of the core 11 is lowered. The second inseam low basis weight area 37 has substantially the same configuration as the inseam low basis weight area 36, and the vertically long portion 37l along the vertical direction (longitudinal direction of the absorbent core) and the left and right direction (absorbent) A plurality of laterally long portions 37w along the width direction of the core are formed to intersect with each other. The second crotch low basis weight region 37 is disposed across the crotch region 11B and the heel region 11C. In addition, in order to distinguish between the inseam low basis weight region 36 and the second inseam low basis weight region 37 described above, in the following, the inseam low basis weight region 36 may be referred to as a "first inseam low basis weight region 36" is there.

  In addition, the absorbent core 11 is an upper side in the vertical direction above the first crotch low basis weight region 36 and a front side (front side portion 10F) in the front-rear direction, and a longitudinally long portion 37l of the second crotch low basis weight region 37 Between the left and right direction, there is a "central low basis weight region 32" which is a region where the basis weight of the absorbent core 11 is lower than that of the surrounding. The central low basis weight region 32 is disposed along the vertical direction (longitudinal direction of the absorbent core 11) at the central portion in the left and right direction of the absorbent core 11, has a lower basis weight than the surroundings, and is lower than the lateral direction. It is a substantially rectangular area which is long in the vertical direction. Similarly, the central low basis weight region 32 corresponds to the central portion in the left-right direction on the upper side in the vertical direction above the first crotch low basis weight region 36 and on the rear side (rear side portion 10R) in the front-rear direction. A "central low basis weight area 33" is provided. In the present embodiment, it is assumed that the absorbent core 11 does not exist in the central low basis weight regions 32 and 33. That is, the central low basis weight regions 32 and 33 are holes penetrating the absorbent core 11 in the thickness direction.

  Next, the deformation of the absorbent core 11 when the diaper 1 is worn will be specifically described. FIG. 7 is a schematic perspective view for explaining the deformation of the absorbent core 11 when the diaper 1 is worn.

  In the diaper 1, in the central low basis weight regions 32, 33, the absorbent core 11 penetrates in the thickness direction, and the rigidity is the lowest. Therefore, the absorbent core 11 is most likely to be bent and deformed in the central low basis weight regions 32 and 33. Therefore, when the absorbent core 11 is sandwiched between the legs at the crotch of the wearer when the diaper 1 is worn, the absorbent core 11 is vertically moved at the central low basis weight regions 32, 33 (the absorbent core 11 Bend left and right along the longitudinal direction). Thereby, in the crotch region 11B between the central low basis weight regions 32, 33 in the longitudinal direction, as shown in FIG. 7, the absorbent core 11 deforms in a convex shape along the longitudinal direction to the skin side of the wearer, Convex part 11t is formed. That is, the central low basis weight regions 32, 33 have a function as a "folding guide region" for bending the absorbent core 11 along the longitudinal direction in the crotch region 11B. By convexly deforming the absorbent core 11 to the skin side at the crotch region 11 B, the convex portion 11 t can be easily fitted along the crevice of the wearer's excretion opening and buttocks, and the absorbability of excrement in the crotch region is improved. Can.

  Then, in the front side portion 10F, from the crotch region 11B to the lower abdomen position 11A, the absorbent core 11 stands up along the curved surface shape of the abdomen of the wearer. On the other hand, in the rear side portion 10R, from the crotch region 11B to the heel region 11C, the absorbent core 11 rises along the curved surface shape of the buttocks of the wearer. Thereby, at the time of wear of the diaper 1, the absorptive core 11 deform | transforms into a shape like FIG.

  However, since the conventional diaper does not have a portion corresponding to the inseam elastic region 23s of this embodiment, there is a problem in the fit in the crotch region even if the absorbent core can be deformed flexibly. was there. FIG. 8 is a schematic cross-sectional view showing a deformed state in the crotch region 11B of the absorbent core 11 in the case where the crotch elastic region 23s is not provided as a comparative example. FIG. 9 is a schematic cross-sectional view showing a deformed state of the crotch region 11B of the absorbent core 11 when the crotch elastic region 23s is provided. In FIG. 8 and FIG. 9, the appearance of the deformation of the absorbent core 11 in the crotch region of the diaper wearer is represented as the cross-sectional shape of the absorbent core 11 when viewed from the front of the wearer.

  In the comparative example of FIG. 8, in the crotch portion (crotch region 11B) of the wearer, the absorbent core 11 is sandwiched between the legs of the wearer and compressed in the left-right direction, so that the central portion in the left-right direction of the absorbent core A convex portion 11 t which is bent along the longitudinal direction (vertical direction) and protrudes to the skin side is formed. However, by being compressed in the left-right direction, the convex portion 11t in the central portion is lifted to the non-skin side of the wearer, and a gap is generated between the absorbent core 11 and the skin of the wearer. In particular, since the stretchability along the longitudinal direction by the leak-barrier elastic member 41 acts on both sides in the left-right direction of the absorbent main body 10, both sides in the left-right direction are at the base of the wearer's leg It is in a fixed state. In this state, when the absorbent core 11 is compressed in the left-right direction, the central portion (protrusion 11t) which is more easily deformed than the both ends in the left-right direction is lifted up so as to be pushed out to the non-skin side of the wearer A gap is likely to occur between the sex core 11 and the skin of the wearer. As a result, the fit of the absorbent core 11 may be deteriorated, or excrement that has not been absorbed may leak.

  On the other hand, in the diaper 1 of the present embodiment, the crotch elastic region 23s provided on the non-skin side of the absorbent core 11 (absorbent main body 10) in the crotch region 11B is the longitudinal direction of the absorbent core 11 (upper and lower By shrinking along the direction, as shown in FIG. 9, the absorbent core 11 is pressed to the skin side of the wearer. At that time, the laterally long portion 36w of the crotch low basis weight region 36 becomes a starting point of bending deformation along the left and right direction of the absorbent core 11, and the absorbent core 11 is in the longitudinal direction (vertical direction) according to the wearer's crotch shape. It is pressed against the crotch of the wearer while bending. In addition, the absorbent core 11 is easily bent toward the wearer's skin by providing a plurality of laterally long portions 36w serving as a bending starting point along the left and right direction at intervals in the longitudinal direction (vertical direction). The formation of the convex portion 11t is promoted. Thereby, the absorbent core 11 comes to fit firmly to a crotch of a wearer, maintaining the convex part 11t of the center part of the left-right direction. Therefore, it becomes difficult to form a crevice between absorptive core 11 and a wearer's skin (crotch), and it becomes easy to control that excrement leaks.

  Further, in the crotch region 11B of the absorbent core 11, a plurality of vertically elongated portions 36l are arranged at predetermined intervals in the left-right direction (see FIG. 6), but between two adjacent vertically elongated portions 36l and 361 The “crotch high basis weight region 51” is provided along the vertical direction (longitudinal direction of the absorbent core 11). The crotch high basis weight region 51 is a region where the basis weight is higher than the crotch low basis weight region 36, and the length in the vertical direction (longitudinal direction) is the horizontal direction (width direction), as shown by the broken line in FIG. It has a substantially rectangular shape longer than the length of.

  By providing the crotch high basis weight region 51 between the lower basic weight long vertical portions 36l and 361 in the left-right direction, the absorbent core 11 is likely to be bent and deformed laterally along the longitudinal direction. There is. That is, a crotch high basis weight region 51 having high basis weight and high rigidity is provided on both sides in the left and right direction of the vertically elongated portion 36l which has a low basis weight and tends to be a bending starting point. Between the crotch high basis weight regions 51, 51, the longitudinally long portion 36l functions like a joint. Thereby, in the absorbent core 11, bending deformation is likely to occur at the portion of the longitudinally long portion 36l between the crotch high basis weight regions 51, 51, and occurrence of bending deformation at the portion other than the longitudinally long portion 36l is suppressed. The deformation of the absorbent core 11 can be controlled to some extent. And by providing such a crotch high basic weight area | region 51 with two or more, the absorptive core 11 can deform | transform appropriately according to a wearer's body shape.

  In the rear side 10R of the absorbent main body 10, on the upper side (rear side in the longitudinal direction) above the crotch low basis weight region 36, the second crotch low basis weight region 37, and the central low basis weight region 33 in the vertical direction There is provided a “hip portion high basis weight region 55” whose basis weight is higher than these low basis weight regions. The buttock high basis weight region 55 is a region continuous in the left and right direction, and the boundary between the buttock high basis weight region 55 and the second inseam low basis weight region 37 (and the center low basis weight region 33) is in the left and right direction. From the center to both outwards and obliquely downward. Therefore, the part basis weight region 55 has a substantially U-shaped (or V-shaped) shape as shown by the dotted line in FIG.

  When the diaper 1 is worn, in the crotch region 11B, as described above, the absorbent core 11 is deformed into a mountain shape that is convex on the skin side of the wearer, and along the vertical direction (longitudinal direction of the absorbent core 11) The convex part 11t is formed continuously. On the other hand, in the rear side portion 10R, as shown in FIG. 7, the absorbent core 11 is deformed so as to rise from the crotch region 11B to the heel region 11C. That is, the absorbent core 11 performs different deformations in the crotch region 11B and the heel region 11C.

  Therefore, in the present embodiment, by providing the buttocks high basis weight region 55 on the rear side in the longitudinal direction of the central low basis weight region 33 and the second crotch low basis weight region 37, the absorbent core 11 is smoothed at the boundary portion. To make it easier to Specifically, the buttock high basis weight region 55 blocks the transmission of the force that causes the absorbent core 11 to be convexly deformed to the skin side in the crotch region 11B from the crotch region 11B to the heel region 11C. Thereby, in the heel region 11C, it is possible to suppress convex deformation of the central portion in the left-right direction of the absorbent core 11 to the skin side of the wearer. In particular, since the central low basis weight region 33 which is a through hole functions as a fold guiding region having the lowest rigidity and being easily bent, the upper side in the vertical direction (the rear side in the longitudinal direction) than the central low basis weight region 33 By providing the buttocks high basis weight region 55, it is possible to easily suppress the transmission of the force for causing the absorbent core 11 to convexly deform to the buttocks side.

  Then, the force acting to compress the absorbent core 11 in the left and right direction in the crotch region 11B is concentrated at the boundary between the buttocks high basis weight region 55 and the low basis weight region (33, 37), At the boundary, the absorbent core 11 is easily bent. As a result, the region on the rear side of the absorbent core 11 in the longitudinal direction than the buttocks basis weight region 55 does not deform in a convex shape as in the crotch region 11B, and the buttocks basis weight region 55 and the low basis weight The boundary with the region (33, 37) is bent to rise to the buttocks side of the wearer as a starting point. Therefore, the absorbent core 11 is likely to be deformed naturally according to the body shape of the wearer.

  At this time, the boundary between the buttock high basis weight region 55 and the low basis weight region (33, 37) is inclined from the center in the left-right direction to both outer sides and from the rear side to the front side in the longitudinal direction. The area of the core 11 in the longitudinal direction behind the buttocks high basis weight area 55 rises obliquely along the slope of the boundary and deforms so as to wrap the buttocks of the wearer. Thereby, the fit property of the absorptive core 11 in a wearer's buttocks can be improved.

  Further, in the rear side portion 10R, the buttocks high basis weight region 55 is located on the upper side (rear side in the longitudinal direction) in the vertical direction than the inseam stretchable region 23s (see FIG. 5). Therefore, the influence of the stretching force along the vertical direction acting on the absorbent core 11 by the crotch stretch region 23s is blocked by the buttocks high basis weight region 55, and the rear side in the longitudinal direction than the buttocks high basis weight region 55 The stretching force by the crotch stretch region 23s is less likely to act on the region of. Thereby, the natural deformation of the absorbent core 11 on the buttock side is less likely to be inhibited, and the fit of the absorbent core 11 on the buttocks of the wearer can be further improved.

  Further, as shown in FIG. 6, in the rear side 10R of the absorbent core 11, on the upper side (rear side in the longitudinal direction) above the buttocks high basis weight area 55 in the vertical direction, the absorbent core compared to the periphery. The area | region where the basis weight of 11 became low is provided with "the buttocks low basis weight area | region 38." The buttock low basis weight area 38 has substantially the same configuration as the second crotch low basis weight area 37, and has a vertically long portion 38l and a horizontally long portion 38w. The buttock low basis weight region 38 allows the absorbent core 11 to be freely deformed at the heel portion 11C. As described in FIG. 7, the absorbent core 11 of the present embodiment performs totally different deformation in the upper area (the buttock side) and the lower side (the crotch side) with the buttock high basis weight area 55 interposed therebetween. By providing the low basis weight regions in the respective regions, the absorbent core 11 can be more easily deformed naturally.

  The width W 38 in the left-right direction of the buttock low basis weight area 38 (ie, the distance between the left end of the leftmost vertical portion 38l and the right end of the rightmost vertical portion 38l) Wider than the width W 37 (that is, the distance between the left end of the leftmost vertical portion 37 l and the right end of the rightmost vertical portion 37 l) in the left-right direction of the bifurcated low basis weight area 37 W38> W37). In the rear side portion 10R of the absorbent core 11, the area provided with the buttocks low basis weight region 38 is a portion that widely covers the buttocks of the wearer, so it becomes a bending starting point over as wide a range as possible in the lateral direction. By providing the low basis weight region, the wide range of the absorbent core 11 can be easily deformed along the roundness of the buttocks.

  Similarly, the width W 37 in the left-right direction of the second crotch low basis weight region 37 is the width W 36 in the left-right direction of the first crotch low basis weight region 36 (that is, the left end of the longitudinally long portion 36 l located at the leftmost Distance (W37> W36) is greater than the distance between the right end of the vertically extending portion 36l located on the right side. Also in this case, in the second inseam low basic weight area 37 closer to the buttocks than the first inseam low basic weight area 36 in the absorbent core 11, a low basis weight serving as a starting point of bending over as wide a range as possible in the lateral direction. By providing the region, the wide range of the absorbent core 11 can be easily deformed along the roundness of the buttocks.

  Further, as shown in FIG. 6, in the front side portion 10F of the absorbent core 11, the basis weight of the absorbent core 11 in the upper side (front side in the longitudinal direction) in the vertical direction than the crotch low basis weight region 36 An "inclined low basis weight area 31" is provided, which is an area where the amount is lowered. The inclined low basis weight regions 31 are provided on the front side of the absorbent core 11 in the left-right pair, and are inclined obliquely downward from both sides in the left-right direction toward the center. That is, it is a region inclined from the upper side in the vertical direction to the lower side, and from the outer side in the lateral direction toward the center side. When the diaper 1 is worn, the inclined low basis weight region 31 obliquely contacts the crotch from around the pubic bone of the wearer. Therefore, in the front side portion 10F of the absorbent core 11, the inclined low basis weight region 31 becomes a bending starting point of the shape along the base of the leg of the wearer. Therefore, even when the wearer walks or moves the leg back and forth, the absorbent core 11 follows the movement of the leg three-dimensionally and follows the movement of the body on the ventral side of the wearer. It becomes easy to deform freely.

  In the rear side portion 10R of the absorbent core 11, there is not provided a low basis weight region inclined as in the case of the inclined low basis weight region 31. On the buttocks side (the rear side 10R), no action is taken to swing the wearer's legs up largely to the back side, and the absorbent core 11 covers a wide range along the roundness of the buttocks as described above. It is because it is good if it can be deformed.

  Further, as shown in FIG. 5, the length W23s in the left-right direction of the crotch elastic region 23s is smaller than the minimum value of the length (width) W11c in the left-right direction of the absorbent core 11 (that is, the width at the constriction 11c). Is narrower (W11c> W23s). With such a configuration, the stretchability by the crotch stretch area 23s is less likely to act at both ends in the left-right direction of the absorbent core 11. Then, in the crotch region 11B, the crotch low weight area is not provided at both ends in the left-right direction of the absorbent core 11, and the "crotch side high weight area 52" is higher in weight than the periphery. It is formed (see FIG. 6). Since the rigidity of the absorbent core 11 is high in the crotch-side high basic weight region 52, deformation of the absorbent core 11 is unlikely to occur in the region.

  When the diaper 1 is worn, in the crotch region 11B, the absorbent core 11 is convexly deformed to the skin side (see FIG. 7), but at this time, the crotch under side high basis weight regions 52 of both end portions in the left and right direction are deformed. By making it difficult to do so, the absorbent core 11 can easily maintain a mountain-shaped convex shape. That is, by providing a crotch-side high basis weight area 52 which is not easily deformed on both sides of the convex portion 11t formed in the central portion in the lateral direction, the convex portion 11t can be supported from both sides in the lateral direction. As a result, the shape of the projection 11t is less likely to collapse. Thereby, the fit of the absorbent core 11 can be further improved.

  Further, the minimum value of the length (width) W52 in the left-right direction of the crotch-side high basis weight area 52 is wider than the length (width) W51 in the left-right direction of the crotch-high basis weight area 51 (W52> W51) ). As described above, the crotch high basis weight region 51 has a function of facilitating bending of the absorbent core 11 by sandwiching the longitudinally long portion 36l. Therefore, if the width W51 is too wide, the metamorphic core 11 may become difficult to bend. On the other hand, since the crotch both side high basis weight region 52 is a region having a function of supporting the both hem of the convex shape when the absorbent core 11 is bent and deformed, it is desirable that the width has a certain degree . Therefore, in the diaper 1, by providing the high basis weight regions 51 and 52 so as to satisfy W52> W51, the strength of the absorbent core 11 can be easily secured in both end regions in the left-right direction. Make it easy to deform.

  Moreover, since the diaper 1 has a structure in which the absorbent main body 10 is bridged between the front belt portion 21 and the rear belt portion 22, the front and rear belt portions 21 and 22 are worn when the diaper 1 is worn. Allows the waist of the wearer to be firmly held, and then the absorbent main body 10 can be pulled upward. Therefore, it is difficult for the absorbent core 11 to slip off, and by the action of the crotch elastic region 23s, it is easy to firmly adhere the crotch of the wearer.

  Furthermore, the crotch elastic region 23s has a portion overlapping the front elastic region 21s of the front belt portion 21. Similarly, the crotch elastic region 23 s has a portion overlapping the rear elastic region 22 s of the rear belt portion 22. As a result, the expansion and contraction force of the crotch elastic area 23s interlocks with the expansion and contraction force of the front elastic area 21s and the rear elastic area 22s, and the crotch elastic area 23s contracts toward the upper end in the front portion 10F and the rear side 10R. It will be easier. Therefore, the absorbent core 11 can be easily pulled up to the crotch side of the wearer, and the fit of the absorbent core 11 (absorbent main body 10) can be further improved.

  As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, it goes without saying that the present invention can be modified or improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

1 Pants-type disposable diaper (diaper, pants-type absorbent article),
1a waist opening, 1b leg opening,
10 Absorbent body, 10F front side, 10R rear side,
11 absorbent core, 11A lower abdomen position, 11B crotch region, 11C heel region,
11c neck, 11t convex,
12 top sheets, 13 back sheets, 14 side sheets,
20 exterior members,
21 front belt portion (ventral side exterior member), 21s front elastic region,
211 waist area, 212 crotch area, 213 skin side sheet, 214 non-skin side sheet, 215 elastic nonwoven fabric,
22 back belt portion (back exterior member), 22s back stretchable area,
221 waist area, 222 crotch area, 223 skin sheet, 224 non-skin sheet, 225 elastic nonwoven fabric,
23 crotch member (crotch exterior member), 23s crotch stretch area,
231 skin sheet, 232 non-skin sheet, 233 elastic nonwoven fabric,
24 end junction area,
25a, 25b welds,
26 waist elastic members, 27 leg elastic members, 28 crotch elastic members,
31 Sloped low basis weight area,
32 central low basis weight area, 33 central low basis weight area,
36 crotch low basis weight area (1st crotch low low basis weight area), 36 l vertical part, 36 w horizontal part,
37 second inseam low basis weight area, 37 l vertical length, 37 w horizontal length,
38 buttocks low basis weight area, 38 l tall, 38 w horizontal,
40 leakproof wall,
41 leak-barrier elastic member, 42 leak-barrier elastic member,
51 inseam high basis weight area, 52 inseam side high basis weight area,
55 buttocks basis weight area,
CL predetermined position

Claims (13)

Have vertical and horizontal directions that cross each other, and
The absorbent main body disposed along the vertical direction, the absorbent main body being bent back and forth at the lower end in the vertical direction;
A crotch member having a crotch elastic region which is laminated on the non-skin side of the absorbent core in the crotch region located on the crotch of the wearer when worn, and which extends and contracts along the vertical direction;
A pant-type absorbent article having
The crotch low basis weight region having a lower average basis weight than the surrounding region is provided in the crotch region of the absorbent core,
The crotch low basis weight region has a laterally long portion along the lateral direction,
The pants-type absorbent article, wherein at least a part of the laterally long portion overlaps the inseam elastic region. The pants-type absorbent article according to claim 1, wherein
The crotch low basis weight region has a plurality of longitudinally long portions along the vertical direction at intervals in the horizontal direction,
A crotch high basis weight area having a higher average basis weight than the crotch low basis weight area is provided along the vertical direction between the vertically-long portions adjacent to the left-right direction. Pants type absorbent article. The pants-type absorbent article according to claim 1 or 2,
The absorbent core has a rear side portion which is a portion bent to the rear side in the front-rear direction,
In the rear side portion, a buttock high basis weight region having a higher average basis weight than the crotch low basis weight region is provided on the upper side in the vertical direction than the crotch low basis weight region. Pants type absorbent article. The pants-type absorbent article according to claim 3, wherein
The pants-type absorbent article is characterized in that the boundary between the crotch low basis weight area and the buttocks high basis weight area is slanted downward from the center in the left-right direction toward both outsides. . The pants-type absorbent article according to claim 3 or 4, wherein
The pants-type absorbent article, wherein the crotch low basis weight region is located above the crotch elastic region on the rear side. The pants-type absorbent article according to any one of claims 3 to 5, wherein
In the above-mentioned back side, a buttock low basis weight area whose average basis weight is lower than that of the surrounding area is provided above the crotch low basis weight area. Sex goods. The pants-type absorbent article according to claim 6, wherein
The crotch low basis weight region includes a first crotch low basis weight region, and a second crotch low basis weight region positioned above the first crotch low basis weight region in the vertical direction,
The second crotch low basis weight region has a plurality of longitudinally long portions along the vertical direction at intervals in the horizontal direction,
In the second crotch low basis weight area, the length between the vertically extending portion located on the most side in the left-right direction and the vertically extending portion located on the other side is
A pants-type absorbent article characterized in that it is shorter than the length of the buttock low basis weight region in the left-right direction. The pants-type absorbent article according to claim 7, wherein
The first crotch low basis weight region has a plurality of longitudinally long portions along the vertical direction at intervals in the horizontal direction,
In the first crotch low basis weight area, a length between the vertically elongated portion located on the most side in the left-right direction and the longitudinally elongated portion located on the other side is
The second crotch low basic weight area is characterized in that it is shorter than a length between the longitudinally long portion located closest to one side and the longitudinally long portion located closest to the other side in the left-right direction. Pants type absorbent article. The pants-type absorbent article according to any one of claims 3 to 8, wherein
In the rear side portion, a central low basis weight area which penetrates the absorbent core along the vertical direction is provided on the lower side in the vertical direction of the buttocks high basis weight area and at the center in the horizontal direction. The pants-type absorbent article characterized by being provided. The pants-type absorbent article according to any one of claims 1 to 9, wherein
The absorbent core has a front side portion which is a portion bent to the front side in the front-rear direction,
In the front side, the upper side in the vertical direction from the crotch low basis weight area is inclined from the upper side in the vertical direction to the lower side, and from the outer side in the horizontal direction toward the center side from the surrounding area A pair of sloped low basis weight regions having a low basis weight is also provided. The pants-type absorbent article according to any one of claims 1 to 10, wherein
The length of the inseam stretchable area in the left-right direction is
Shorter than the minimum value of the length of the absorbent core in the lateral direction,
A crotch-side high basis weight area having an average basis weight higher than that of the crotch low basis weight area is provided at both end portions in the left-right direction of the absorbent core. Sex goods. It is a pants type absorbent article according to any one of claims 1 to 11,
A front belt portion joined to an upper end portion of the absorbent main body, which is bent to the front side in the front-rear direction;
And a rear belt portion joined to an upper end portion of the absorbent main body, which is bent to the rear side in the front-rear direction,
The pants-type absorbent article, wherein the front belt portion and the rear belt portion are joined to each other at both side portions in the left-right direction. The pants-type absorbent article according to claim 12, wherein
The front belt portion has a front stretchable region that stretches in the left-right direction,
The rear side belt portion has a rear side stretchable region that stretches in the left-right direction,
At least a part of the inseam stretchable region overlaps the front stretchable region and the rear stretchable region in the vertical direction.

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