JP2019118556A - Underpants type absorbent article - Google Patents

Abstract

To provide an underpants type absorbent article in which fitting property is improved on an abdominal side of an absorbent core.SOLUTION: An underpants type absorbent article (1) has: an absorbent body (10) which comprises an absorbent core (11) and is folded from front to rear at a lower end; and a front side belt part (23) having a front side elastic region (23 s) extending and contracting in a lateral direction. The absorbent core (11) has a front side part (10F) which is a portion folded to the front side in a longitudinal direction. The absorbent core (11) has a pair of inclined low basis weight regions (31) which are inclined, in the front side part (10F), from the upper side to the lower side in a vertical direction and from the outer side to the center side in the lateral direction, and whose basis weight is lower than that of a surrounding region. The whole of the pair of inclined low basis weight regions (31) overlaps with the front elastic region (23 s).SELECTED DRAWING: 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, Patent Document 1 discloses an absorbent article provided with an opening portion 63 which is disposed to be biased toward the forepart in the longitudinal direction of the absorbent core and is curved toward the inside.

JP 2007-202575 A

  According to the absorbent article of Patent Document 1, the absorbent core is likely to be three-dimensionally deformed along the wearer's body shape by the slits or the like provided in the absorbent core. However, such an absorbent article may fail to obtain sufficient fit. For example, when the absorbent core is deformed convexly to the wearer's skin side, the wide area of the absorbent core floats or sags from the wearer's body, and the absorbent core The fit may be deteriorated due to the formation of a gap with the skin. In particular, the area between the ventral side of the absorbent core and the crotch region is significantly deformed when the wearer moves the leg (for example, when walking), so the fit is likely to be deteriorated.

  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 having an improved fit on the ventral side of the absorbent core. .

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 pant-type absorbent article comprising: an absorbent main body bent in front and back; and a front belt part joined to the front upper end of the absorbent main body and having a front elastic region which is expanded and contracted in the left and right direction, The absorbent core has a front side portion which is a portion bent to the front side in the front and rear direction, and in the front side, the absorbent core is from the upper side to the lower side in the vertical direction and the outer side in the left and right direction And a pair of sloped low basis weight areas which are inclined toward the center side and whose basis weight is lower than that of the surrounding area, and the whole of the pair of sloped low basis weight areas overlap with the front stretchable area Are characterized by It is a pants-type absorbent article.
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 having an improved fit on the ventral side of the absorbent core.

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. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state, illustrating the positional relationship between various stretchable regions (21s, 22s, 23s) 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. It is a schematic sectional drawing explaining the state which the absorptive core 11 lifted from the wearer's body (skin). In FIG. 8, it is a schematic sectional drawing explaining the case where the contraction force of the left-right direction by 21 s of front side elastic | stretching area | regions acts on the absorptive core 11. FIG.

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, horizontal directions, and front to back directions intersecting with each other and disposed along the vertical directions, wherein the absorbent main body is bent back and forth at lower end portions in the vertical direction; It is a pants-type absorbent article having a front side belt portion joined to a front upper end portion of an absorbent main body and having a front side stretchable area which is expanded and contracted in the left and right direction, wherein the absorbent core is on the front side in the front and rear direction. The absorbent core is inclined from the upper side to the lower side in the vertical direction and the outer side from the lateral direction to the central side in the front side, A pair of sloped low basis weight areas having a basis weight lower than that of the area, and the whole of the pair of sloped low basis weight areas overlaps the front stretchable area. Absorbent article.

  According to such a pants-type absorbent article, the absorbent core follows the movement of the wearer's legs by a pair of inclined low basis weight regions obliquely arranged along the crotch from the pubic bone of the wearer It becomes easy to deform freely. And when the elastic force of the left-right direction acts from the non-skin side of an absorptive core, at the time of wear of a diaper, an absorptive core is pressed on a wearer's lower abdomen. Thus, the fit of the absorbent body near the pubis of the wearer is improved.

  In such a pants-type absorbent article, a central low basis weight region which penetrates the absorbent core along the vertical direction between the left and right direction of the pair of inclined low basis weight regions in the front side portion. Is desirable.

  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 wearer's outlet.

  In such a pants-type absorbent article, it is preferable that the width in the short direction of the central low basis weight region is wider than the width in each short direction of the pair of inclined low basis weight regions.

  According to such a pants-type absorbent article, since the central low basis weight region is smaller in rigidity than the inclined low basis weight region and is more likely to be bent and deformed, the absorbent core is sandwiched between the crotch of the wear; The area of the central low basis weight area is first bent, and then the inclined low basis weight area is the starting point of bending deformation. This allows the absorbent core to be naturally deformed along the wearer's body shape.

  In the pants-type absorbent article, it is preferable that the lower end of the pair of inclined low basis weight regions is higher than the lower end of the central low basis weight region in the vertical direction.

  According to such a pants-type absorbent article, by providing the central low basis weight area to a height close to the crotch of the wearer, it becomes easy to function as a fold guiding area for convexly deforming the sex core . On the other hand, by providing the pair of inclined low basis weight regions at a height near the pubis of the wearer, the absorbent core can be freely deformed according to the movement of the legs of the wearer.

  In the pants-type absorbent article, it is preferable that the upper end position of the pair of inclined low basis weight regions is higher than the upper end position of the central low basis weight region in the vertical direction.

  According to such a pants-type absorbent article, the position of the central low basis weight region is not too high, and the absorbent core can be less likely to be convexly deformed in the flat region of the abdomen of the wearer. On the other hand, by providing the inclined low basis weight region to a position higher than the central low basis weight region, it is possible to easily cause bending deformation to the upper side of the absorbent core following the movement of the leg of the wearer.

  The pants-type absorbent article is provided with a rear belt portion joined to the rear upper end of the absorbent main body and having a rear stretchable region that stretches in the left-right direction, and the front side in the left-right direction There is an end joining area for joining both ends of the belt section and both ends of the rear side belt section, and the lower end edge of the front side belt section is obliquely lower toward the crotch from the lower end of the end joining area. It is desirable to have an inclined portion inclined to the

  According to such a pants-type absorbent article, when the front and rear belt portions are pulled to both sides in the left-right direction when the diaper is worn, the inclined portions are also pulled to the outside in the left-right direction. As a result, the absorbent main body can be easily pulled upward. As a result, the absorbent main body is less likely to be displaced from around the pubis of the wearer, and the fit is improved.

  In the pants-type absorbent article, the smaller one of the angles formed by the inclined portion with the vertical direction is larger than the smaller one of the angles formed by the inclined low basis weight region with the vertical direction. Is desirable.

  According to such a pants-type absorbent article, since the absorbent main body is easily pulled in the left-right direction, the stretchability in the left-right direction acts on the absorbent core bent and deformed along the inclined low basis weight region. It becomes easy to do. Therefore, the absorbent core is easily pressed against the skin of the wearer, and the fit is improved.

  In the pants-type absorbent article, it has a leg elastic member which expands and contracts along the inclined portion, and a region where the elasticity by the leg elastic member is developed overlaps the absorbent core. Not, it is desirable.

  According to such a pants-type absorbent article, when pulling up the absorbent main body in the diagonally upward direction, an excessive force hardly acts on the absorbent core itself, and bending deformation of the absorbent core is hardly inhibited.

  In such a pant-type absorbent article, the absorbent core has a constricted portion in which the width in the lateral direction is narrowed at the front side portion, and the width in the lateral direction is the narrowest among the constricted portions. It is desirable that a portion that is overlapped with the front stretchable area.

  According to such a pant-type absorbent article, in the waist portion of the absorbent core, the stretchability in the left-right direction by the front stretchable area acts on the part where the width in the left-right direction is the narrowest and likely to be deformed. The deformed absorbent core is pressed against the skin side of the wearer, which makes it easy to adhere. Therefore, it is possible to improve the fit while appropriately deforming the absorbent core according to the body shape.

  In such a pants-type absorbent article, a central low basis weight region which penetrates the absorbent core along the vertical direction between the left and right direction of the pair of inclined low basis weight regions in the front side portion. It is preferable that the position of the narrowest portion in the vertical direction in the vertical direction is higher than the position of the lower end of the central low basis weight region.

  According to such a pant-type absorbent article, in the narrow portion of the absorbent core, the force for causing the absorbent core to be convexly deformed along the vertical direction in the portion where the width in the left-right direction is the narrowest and likely to be deformed It becomes difficult to interfere with the force of rising and deforming the absorbent core from the crotch to the lower abdomen according to the shape of the body. This makes it easier for the absorbent core to deform properly.

  In the pants-type absorbent article, the pair of inclined low basis weight regions includes a pair of first inclined low basis weight regions and an inner region in the left-right direction of the pair of first inclined low basis weight regions. It is preferable to have a pair of 2nd inclination low basic-weight area | regions provided.

  According to such a pants-type absorbent article, in addition to the pair of first inclined low basis weight regions, the pair of second inclined low basis weight regions is provided to deform the absorbent core. The origin of bending increases, and the absorbent core is more easily deformed.

  In the pants-type absorbent article, it is preferable that the length in the longitudinal direction of the pair of second inclined low basis weight regions is shorter than the length in the longitudinal direction of the pair of first inclined low basis weight regions .

  According to such a pants-type absorbent article, bending deformation of the absorbent core becomes small in the second inclined low basis weight region inside in the left and right direction, and in the first inclined low basis weight region outside in the left and right direction, Bending deformation of the absorbent core becomes large. Therefore, the absorbent core is likely to be greatly deformed in the lateral area near the wearer's leg and to follow the movement of the leg.

  In the pants-type absorbent article, the lower end of the pair of second inclined low basis weight regions is higher than the lower end of the pair of first inclined low basis weight regions in the vertical direction. Is desirable.

  According to such a pants-type absorbent article, the absorbent core is bent and deformed even in a region close to the crotch of the wearer by extending the inclined low basis weight region on the outer side in the lateral direction to a position as low as possible in the vertical direction. It becomes easy, and it becomes easy to follow by the movement of the leg of the wearer.

  In such a pant-type absorbent article, the absorbent core has a first upper low basis weight area whose basis weight is lower in the front side portion than the surrounding area in the vertical direction, and the upper and lower basis weight areas. A first lower low basis weight area whose basis weight is lower than a surrounding area along a direction, and a lower end of the first upper low basis weight area, and the first inclined low basis weight area It is desirable that the upper end of the first inclined low basis weight area and the upper end of the first lower low basis weight area be connected.

  According to such a pants-type absorbent article, the effects of twisting, stress and the like generated when the absorbent core is deformed in the inclined low basis weight region are dispersed in the upper low basis weight region and the lower low basis weight region be able to. Thereby, the absorbent core can be deformed more naturally in the area concerned.

  In such a pant-type absorbent article, the absorbent core has a second upper low basis weight region having a lower basis weight in the vertical direction than the surrounding region in the front side portion, It is desirable that the lower end of the second upper low basis weight area and the upper end of the second inclined low basis weight area be connected.

  According to such a pants-type absorbent article, it is possible to disperse, in the second upper low basis weight area, the effects of twisting, stress, etc. generated when the absorbent core is deformed in the second oblique low basis weight area. . Thereby, the absorbent core can be deformed more naturally in the area concerned.

=== 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 on the trunk side of the wearer is the upper side, and the side on the crotch of the wearer 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 2 is folded in two at a predetermined position CL in the longitudinal direction, and both lateral portions of the front belt portion 21 and lateral portions of the rear belt portion 22 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 rear belt portion 22 is larger than the crotch-side region 221 of the front belt portion 21, and can widely cover the buttocks of the wearer.

  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 diapar 1, according to a motion of a wearer's body, a mode that an absorptive core 11 (absorbent main part 10) deform | transforms is demonstrated.

  FIG. 5 is a schematic plan view of the diaper 1 in the unfolded and stretched state, and illustrates the positional relationship between the various stretchable regions (21s, 22s, 23s) and the absorbent core 11. As shown in FIG. 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.

  The absorbent core 11 is above the lower end (the position corresponding to the predetermined position CL) in the vertical direction of the diaper 1, and on the front side (front side 10F) in the front-rear direction, based on the basis weight of the absorbent core 11 Has a low slope area 31 which is a low area. The inclined low basis weight region 31 includes a first inclined low basis weight region 311 and a second inclined low basis weight region 312 disposed inward in the left-right direction with respect to the first inclined low basis weight region 311. There is. Each of the inclined low basis weight regions 311 and 312 is a region inclined from the upper side to the lower side in the vertical direction and from the outer side to the central side in the horizontal direction. It is done. Moreover, in the diaper 1, the 1st inclination low basic weight area | region 311 and the 2nd inclination low basic weight area | region 312 are arrange | positioned in parallel.

In addition, "basis weight" of the absorptive core 11 is mass (g / m < ² >) of the absorptive core 11 (for example, liquid absorptive fiber which SAP mixed) per unit area. The comparison of the basis weight of the absorbent core 11 between the inclined low basis weight region 31 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 inclined low basis weight region 31 due to the difference in rigidity between the inclined low basis weight region 31 and the surroundings. Therefore, when the diaper 1 is worn, the absorbent core 11 is easily deformed according to the unevenness of the wearer's body by bending from the inclined low basis weight region 31 and becomes easy to fit the wearer's body . In particular, the inclined low basis weight region 31 is disposed obliquely from the periphery of the pubic bone of the wearer over the crotch. That is, it becomes a bending origin of the shape along the base of a leg of a 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. Can be freely deformed.

  Further, as shown in FIG. 6, the absorbent core 11 is absorbed above the lower end (see FIG. 1) in the vertical direction of the diaper 1 and on the front side (front side 10F) in the front-rear direction as compared with the surroundings. It has a "central low basis weight region 32" which is a region where the basis weight of the sex core 11 is lowered. The central low basis weight region 32 is disposed along the vertical direction (longitudinal direction) at the central portion in the left-right direction of the absorbent core 11, and the basis weight of the absorbent core 11 is lower than that of the surroundings. It is a substantially rectangular area longer in the vertical direction than in the direction. Similarly, a “central low basis weight area 33” corresponding to the central low basis weight area 32 is provided on the upper side of the lower end in the vertical direction of the diaper 1 and on the rear side (rear side 10R) in the front and rear direction ing. 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, 33 are holes through which the absorbent core 11 penetrates in the thickness direction.

  In addition to the above-described inclined low basis weight region 31 and the central low basis weight regions 32 and 33 described above, the basis weight of the absorbent core 11 is lower than that of the surrounding area. A plurality of regions "are provided (see FIG. 6).

  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 11B, the convex portion 11t can be easily fitted along the crevice of the wearer's excretion opening and buttocks, and the absorbability of excrement is improved in the crotch region 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.

  Further, the width d32 in the short direction of the central low basis weight region 32 is larger than the width d31 in the short direction of the inclined low basis weight region 31 (d32> d31). Therefore, the central low basis weight region 32 is smaller in rigidity than the inclined low basis weight region 31 and is more likely to be bent and deformed. Therefore, by sandwiching the absorbent core 11 between the worn crotch, the region between the central low basis weight regions 32, 33 is first bent, and then the inclined low basis weight region 31 becomes the origin of bending deformation. Thereby, when the diaper 1 is worn, the absorbent core 11 tends to be convexly deformed along the wearer's body shape between the central low basis weight regions 32 and 33. In addition, after wearing, the absorbent core 11 tends to be naturally deformed along the inclined low basis weight region 31 according to the movement of the leg of the wearer.

  However, three-dimensionally deforming the absorbent core 11 so as to have unevenness with respect to the wearer's skin generates a portion where the absorbent core 11 is lifted from the wearer's skin. There is a possibility that the fit may be deteriorated in the area of part. FIG. 8 is a schematic cross-sectional view for explaining a state in which the absorbent core 11 is lifted from the body (skin) of the wearer. FIG. 8 shows a cross section at the lower abdomen position of the wearer when viewed from the upper side, and a cross sectional shape of the absorbent core 11 deformed at the lower abdomen position 11A.

  In the lower abdomen of the wearer, as shown in FIG. 8, the absorbent core 11 is deformed so that the cross section becomes substantially W-shaped. That is, at the central portion in the left-right direction, bending deformation that is convex on the skin side of the wearer occurs, and the convex portion 11 t is formed. On the other hand, on both sides in the left-right direction of the convex portion 11t, bending deformation occurs so as to be concave on the skin side of the wearer, starting from the pair of inclined low basis weight regions 31. As a result, the portion bent by the inclined low basis weight region 31 tends to form a gap with the skin of the wearer. In addition, the absorbent core 11 receives compression force in the left-right direction by being pinched by the legs of the wearer, so that the center part in the left-right direction of the absorbent core 11 is pushed out from both ends. It becomes easy to rise up. That is, there is a possibility that it will become difficult to fit on a wearer's skin because the absorptive core 11 bends in three dimensions and produces a deformation.

  On the other hand, in the diaper 1 of the present embodiment, the whole of the inclined low basis weight area 31 of the absorbent core 11 overlaps with the front stretchable area 21s of the front belt portion 21 (see FIG. 5). That is, the stretchability in the left-right direction acts on the region where the inclined low basis weight region 31 is disposed in the absorbent core 11. Thereby, the absorptive core 11 which bent and changed from the inclination low basic weight area | region 31 can be stuck to a wearer's skin. FIG. 9 is a schematic cross-sectional view for explaining the case where the contraction force in the left-right direction by the front stretchable region 21s acts on the absorbent core 11 in FIG.

  In FIG. 9, the portion of the inclined low basis weight region 31 of the absorbent core 11 deformed so as to be concave toward the skin of the wearer is pressed from the non-skin side of the wearer to the skin by the front elastic region 21s. ing. That is, while the absorbent core 11 is bent and deformed following the movement of the wearer's body, the absorbent core 11 is worn by the contraction force in the left and right direction by the front stretchable region 21s acting from the non-skin side. It closely adheres to the skin of the skin, and a gap is less likely to occur between the absorbent core 11 and the skin of the wearer. Accordingly, the fit of the absorbent core 11 near the pubic bone of the wearer is improved.

  In addition, the whole of the inclined low basis weight region 31 of the absorbent core 11 may not necessarily overlap with the front stretchable region 21s. For example, even if the end in the vertical direction of the inclined low basis weight area 31 is not subjected to the stretching force by the front stretchable area 21s, if the area other than the end is subjected to the stretching force, the wearer as shown in FIG. It is possible enough to fit the body of

  Further, in the front side portion 10F, the lower end 31ed in the vertical direction of the pair of inclined low basis weight regions 31 is at a position higher than the lower end 32ed of the central low basis weight region 32. As described above, in the crotch region 11B, the central low basis weight region 32 is provided at a position close to the crotch of the wearer in order to function as a fold guiding region for causing the absorbent core 11 to be convexly deformed. Is desirable. On the other hand, it is desirable that the inclined low basis weight region 31 be provided in the vicinity of the pubic bone of the wearer since it becomes a starting point for deforming the absorbent core 11 according to the movement of the wearer's legs and the like. The lower end 31ed of the pair of inclined low basis weight regions 31 is at the lower side in the vertical direction of the lower end 311ed of the first inclined low basis weight region 311 and the lower end 312ed of the second inclined low basis weight region 312. Point to In the present embodiment, the lower end 311 ed of the first inclined low basis weight area 311 is the lower end 31 ed of the inclined low basis weight area 31 (see FIG. 6).

  Similarly, in the front side portion 10F, the upper ends 31eu of the pair of inclined low basis weight regions 31 in the vertical direction are higher than the upper ends 32eu of the central low basis weight region 32. The upper area above and below the central low basis weight area 32 is an area that abuts the abdomen of the wearer when the diaper 1 is worn, and is an area close to a flat surface (see FIG. 7). The position of the upper end 32 eu is prevented from becoming too high so that the core 11 is not easily deformed in a convex manner. On the other hand, the inclined low basis weight area 31 is arranged such that the position of the upper end 31eu is as high as possible so that it can be deformed to the upper area of the absorbent core 11 following the movement of the leg of the wearer. The upper end 31eu of the pair of inclined low basis weight regions 31 is the upper side in the vertical direction of the upper end 311eu of the first inclined low basis weight region 311 and the upper end 312eu of the second inclined low basis weight region 312. Point to In the present embodiment, the upper end 311eu of the first inclined low basis weight area 311 and the upper end 312eu of the second inclined low basis weight area 312 are equal in height, and both become the upper end 31eu of the inclined low basis weight area 31.

  Moreover, although the absorptive core 11 of this embodiment has a pair of 2nd inclination low basic weight area | region 312 inside the left-right direction of a pair 1st inclination low basic weight area | region 311, this 1st inclination is The low basis weight region 311 and the second inclined low basis weight region 312 both serve as bending origins of the absorbent core 11. In the present embodiment, the absorbent core 11 is deformed in stages by having a plurality of such bending start points in the left-right direction. That is, by providing a plurality of bending start points in the left-right direction, the absorbent core 11 is more easily bent gently, and it becomes easy to form a three-dimensional curved surface along the body shape near the pubic bone of the wearer.

  And since the length in the longitudinal direction of the first inclined low basis weight area 311 is formed longer than the length in the longitudinal direction of the second inclined low basis weight area 312, it becomes easier to follow the movement of the body. ing. With such a configuration, in the pair of second inclined low basis weight regions 312 arranged in the left and right direction, the bending start points become short, and therefore the bending deformation of the absorbent core 11 becomes small in the inner region. On the other hand, in the pair of first inclined low basis weight regions 311 arranged on the outer side in the left-right direction, the bending start points become long, so the bending deformation of the absorbent core 11 becomes large in the outer region. Therefore, the absorbent core 11 is more likely to be deformed in the lateral area near the wearer's leg and to follow the movement of the leg.

  Furthermore, in the up and down direction, the position of the lower end 311 ed of the first inclined low basis weight region 311 is lower than the position of the lower end 312 ed of the second inclined low basis weight region 312. As described above, by extending the first inclined low basis weight area 311 to a position as low as possible in the vertical direction, the absorbent core 11 is easily bent and deformed even in an area close to the crotch of the wearer and movement of the legs of the wearer Makes it easier to follow.

  In addition, a first upper low basis weight area 341 along the vertical direction (longitudinal direction) is connected to the upper side in the vertical direction of the upper end 311eu of the first inclined low basis weight area 311, and the first inclined low basis weight area 311 is connected. A first lower low basis weight region 351 extending in the vertical direction is connected to the lower side of the lower end 311 ed in the vertical direction. That is, the lower end 341ed of the first upper low basis weight region 341 and the upper end 311eu of the first inclined low basis weight region 311 are connected, and the lower end 311ed of the first inclined low basis weight region 311 and the first lower low basis weight The upper end 351 eu of the region 351 is connected, and the first upper low basis weight region 341, the first inclined low basis weight region 311, and the first lower low basis weight region 351 are vertically continuous.

  If the first upper low basis weight area 341 is not continuously provided on the upper end 311eu of the first inclined low basis weight area 311, the twist, stress, etc. generated by bending deformation of the absorbent core 11 occur at the upper end 311eu. In the upper end 311 eu, the absorbent core 11 may be broken or it may prevent the natural deformation of the absorbent core 11. On the other hand, in the present embodiment, the first upper low basis weight area 341 is continuously provided on the upper end 311 eu of the first inclined low basis weight area 311, thereby the first upper low basis weight area 341 side Stress is likely to be dispersed. Similarly, by the first lower low basis weight region 351 being continuously provided at the lower end 311 ed of the first inclined low basis weight region 311, stress and the like are dispersed on the first lower low basis weight region 351 side. It becomes easy to be done. Thereby, the absorptive core 11 can be more naturally deformed in the said area | region.

  Further, a second upper low basic weight area 342 along the vertical direction (longitudinal direction) is connected to the upper side in the vertical direction of the upper end 312 eu of the second inclined low basic weight area 312. That is, the upper end 312 eu of the second inclined low basis weight area 312 and the lower end 342 ed of the second upper low basis weight area 342 are connected. Similar to the first upper low basis weight region 341 described above, the second upper upper low basis weight region 342 also disperses the stress due to the bending deformation starting from the second inclined low basis weight region 312, thereby making the absorbent core 11 It can be made easier to deform naturally. Note that a low basis weight region corresponding to the first lower low basis weight region 351 is not provided below the lower end 312 ed of the second inclined low basis weight region 312 in the vertical direction. In the second inclined low basis weight region 312, the amount of deformation of the absorbent core 11 is small compared to the first inclined low basis weight region 311, so the influence of twisting and stress is small, and the second upper low basis weight region 342 Makes it possible to disperse stress etc. sufficiently. Therefore, in the second inclined low basis weight area 312, the absorbent core 11 can be naturally deformed without providing the low basis weight area on the lower side.

  Further, the front belt portion 21 is inclined downward in the vertical direction and inward in the left-right direction in the crotch-side region 212 below the lower end of the end joint region 24 (that is, obliquely downward toward the crotch) It has the inclined part 212s which inclines. When the diaper 1 is worn, when the left and right ends of the front and rear belts 21 and 22 are pulled outward to widen the waist opening 1a, the inclined portion 212s is also pulled outward in the left-right direction, and the inclined portion 212s The absorbent main body 10 joined to is also pulled by the inclined portion 212s. That is, a force of pulling up the absorbent main body 10 in a diagonally upward direction acts by the inclined portion 212s, the absorbent main body 10 (absorbent core 11) is less likely to be displaced from the periphery of the pubic bone of the wearer, and the fit is improved.

  In the present embodiment, a tensile force in the left-right direction is easily transmitted to the whole of the inclined portion 212s due to the stretchability of the front side stretchable region 21s. Furthermore, by arranging the leg elastics 27 along the inclined portion 212s, the tensile force by the inclined portion 212s is likely to act on the absorbent main body 10. Therefore, for example, even in the case where the absorbent main body 10 absorbs the excrement and becomes heavy, the absorbent main body 10 can be pulled up firmly, and the positional deviation can be easily suppressed.

  However, the region where the stretchability of the leg elastic member 27 is developed does not overlap with the absorbent core 11. Thereby, when pulling up the absorptive main body 10 diagonally upward, unnecessary power is hard to act on the absorptive core 11 itself, bending deformation of the absorptive core 11 is hard to be inhibited, and the absorptive core 11 It is suppressed that it floats up from a wearer's body. The leg elastics 27 are cut along the left-right direction at the lower end of the front belt portion 21 (the lower end of the lower abdomen 11A) (see FIG. 5). That is, at the lower end portion of the leg elastic member 27, stretchability along the vertical direction is easily exhibited, and stretchability along the left and right direction is hardly expressed. Therefore, the expansion and contraction force by the leg elastics 27 is less likely to act on the absorbent core 11 disposed on the inner side in the left and right direction of the leg elastics 27.

  Further, in the diaper 1 of the present embodiment, the inclination angle θ212s of the inclined portion 212s with respect to the vertical direction is larger than the inclination angle θ31 of the inclined low basis weight region 31 with respect to the vertical direction (θ212s> θ31). Here, as shown in FIG. 2, the inclination angle with respect to the vertical direction refers to the smaller one of the angles formed by the vertical direction and the inclined portion 212 s and the like. If the inclination angle θ 212 s of the inclined portion 212 s is smaller than the inclination angle θ 31 of the inclined low basis weight region 31, the absorbent main body 10 (absorbent core 11) is more easily pulled upward, and the inclined low basis weight region The stretchability in the left-right direction can not be sufficiently acted on the absorbent core 11 bent and deformed along 31, and the absorbent core 11 is easily lifted from the skin of the wearer. In addition, there is a risk that the absorbent core 11 in a bent and deformed state may be twisted or distorted to deteriorate the fit. On the other hand, by making the inclination angle θ 212 s larger than the inclination angle θ 31, the stretchability in the left-right direction works properly while deforming the absorbent core 11 appropriately, and the absorbent core 11 It easily adheres to the skin of the wearer, and the fit can be improved.

  Further, in the diaper 1, the width of the absorbent core 11 in the lateral direction of the absorbent core 11 is the narrowest in the portion 11cmin of the constricted portion 11c, and the rigidity in the lateral direction is the lowest. And this part 11cmin overlaps with the front side expansion-contraction area | region 21s (refer FIG. 6). Therefore, when the diaper 1 is worn, this portion 11cmin tends to be a deformation starting point when the lower abdomen position 11A of the absorbent core 11 rises from the crotch to the lower abdomen side and is deformed. That is, the absorbent core 11 is easily deformed at the portion 11cmin and easily lifted up from the skin of the wearer. On the other hand, in the present embodiment, the stretchability of the left and right direction by the front stretchable region 21s acts on the narrowest portion 11cmin of the width of the absorbent core 11 in the left and right direction. It can be pressed against the skin of the wearer and brought into close contact. As a result, while the absorbent core 11 deforms in accordance with the wearer's body shape, the area around the pubic bone of the wearer can be firmly covered, and the fit in the portion can be improved.

  The narrowest portion 11 cmin of the absorbent core 11 in the left-right direction is provided above the lower end 32 ed of the central low basis weight region 32 in the vertical direction. As described above, the central low basis weight region 32 has a function as a fold guiding region serving as a starting point for causing the absorbent core 11 to be convexly deformed at the central portion in the left-right direction. That is, when the diaper 1 is worn, the absorbent core 11 is deformed so as to be convex on the skin side in the region below the lower end 32 ed of the central low basis weight region 32. Therefore, if the portion 11cmin is provided below the lower end 32ed of the central low basis weight region 32, the force of causing the absorbent core 11 to be convexly deformed along the vertical direction in the portion 11cmin, and the wearer The force that causes the absorbent main body 11 to rise and deform from the crotch to the lower abdomen according to the shape of the body interfere with each other, and there is a possibility that the absorbent core 11 can not be deformed appropriately. Therefore, in the present embodiment, the force acting at the position of the portion 11cmin does not interfere with the force acting at the position of the lower end 32ed such that the portion 11cmin is located above the lower end 32ed of the central low basis weight region 32. It is like that. Thereby, the absorbent core 11 can be easily deformed appropriately.

  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, 212s slope,
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, 31 eu top, 31 ed bottom,
311 first inclined low basis weight area, 311 eu upper end, 311 ed lower end,
312 second inclined low basis weight area, 312eu upper end, 312ed lower end,
32 central low basis weight area, 32 eu top, 32 ed bottom,
33 Central low basis weight area,
341 first upper low basis weight area, 341 ed lower end,
342 second upper low basis weight area, 342 ed lower end,
351 1st lower low basis weight area, 351 eu top,
40 leakproof wall,
41 leak-barrier elastic member, 42 leak-barrier elastic member,
CL predetermined position

The main invention to achieve the above object is
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 front belt portion joined to the front upper end portion of the absorbent main body and having a front stretchable region that stretches in the left-right direction;
A pant-type absorbent article having
The absorbent core has a front side portion which is a portion bent to the front side in the front-rear direction,
The absorbent core is inclined from the upper side to the lower side in the vertical direction and from the outer side to the central side in the front side portion, and the basis weight is lower than that of the surrounding area. Have an inclined low basis weight area,
The whole of the pair of inclined low basis weight regions overlaps the front stretchable region ,
The pair of inclined low basis weight regions is
A pair of first sloped low basis weight regions,
A pair of second sloped low basis weight regions provided in the region on the inner side in the left-right direction of the pair of first sloped low basis weight regions;
It is a pants type absorbent article characterized by having.
Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

Claims (15)

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 front belt portion joined to the front upper end portion of the absorbent main body and having a front stretchable region that stretches in the left-right direction;
A pant-type absorbent article having
The absorbent core has a front side portion which is a portion bent to the front side in the front-rear direction,
The absorbent core is inclined from the upper side to the lower side in the vertical direction and from the outer side to the central side in the front side portion, and the basis weight is lower than that of the surrounding area. Have an inclined low basis weight area,
The whole of a pair of said inclination low basic weight area | regions overlaps with the said front side expansion-contraction area | region, The underpants-type absorbent article characterized by the above-mentioned. The pants-type absorbent article according to claim 1, wherein
In the front side portion, a central low basis weight area which penetrates the absorbent core along the vertical direction is provided between the left and right direction of the pair of inclined low basis weight areas. Pants type absorbent article. The pants-type absorbent article according to claim 2, wherein
The pants-type absorbent article, wherein the width in the short direction of the central low basis weight region is wider than the width in each short direction of the pair of inclined low basis weight regions. The pants-type absorbent article according to claim 2 or 3, wherein
The pants-type absorbent article, wherein the lower end of the pair of inclined low basis weight regions is higher than the lower end of the central low basis weight region in the vertical direction. The pants-type absorbent article according to any one of claims 2 to 4, wherein
The pants-type absorbent article, wherein in the vertical direction, the position of the upper end of the pair of inclined low basis weight regions is higher than the position of the upper end of the central low basis weight region. The pants-type absorbent article according to any one of claims 1 to 5, wherein
It has a rear side belt portion joined to the rear side upper end portion of the absorbent main body, and has a rear side stretchable region that is stretchable in the left-right direction,
In the left and right direction, there is provided an end joint region for joining both end portions of the front side belt portion and both end portions of the rear side belt portion,
The lower end edge of the front side belt portion has an inclined portion which inclines obliquely downward toward the crotch from the lower end of the end joint region. The pants-type absorbent article according to claim 6, wherein
The smaller one of the angles formed by the inclined portion with the vertical direction is
The pants-type absorbent article, wherein the inclined low basis weight area is larger than the smaller one of the angles formed with the vertical direction. The pants-type absorbent article according to claim 6 or 7,
It has a leg elastic member which expands and contracts along the inclined portion,
The pants-type absorbent article, wherein the region in which the stretchability by the leg elastic member is developed and the absorbent core do not overlap. The pants-type absorbent article according to any one of claims 1 to 8, wherein
The absorbent core has a constriction portion in which the width in the lateral direction is narrowed at the front side portion,
The pants-type absorbent article, wherein a portion where the width in the left-right direction is the narrowest in the constricted portion overlaps the front stretchable region. The pants-type absorbent article according to claim 9, wherein
In the front side portion, a central low basis weight region which penetrates the absorbent core along the vertical direction is provided between the left and right directions of the pair of inclined low basis weight regions,
In the vertical direction, the position of the narrowest width of the narrow portion in the narrow portion is higher than the position of the lower end of the central low basis weight region, the pants-type absorbent article . The pants-type absorbent article according to any one of claims 1 to 10, wherein
The pair of inclined low basis weight regions is
A pair of first sloped low basis weight regions,
A pair of second sloped low basis weight regions provided in the region on the inner side in the left-right direction of the pair of first sloped low basis weight regions;
A pants-type absorbent article characterized by having. The pants-type absorbent article according to claim 11, wherein
The length in the longitudinal direction of the pair of second inclined low basis weight regions is
A shorts type absorbent article characterized in that it is shorter than the length in the longitudinal direction of the pair of first inclined low basis weight regions. A pants-type absorbent article according to claim 11 or 12,
The pants-type absorbent article, wherein the lower end of the pair of second inclined low basis weight regions is higher than the lower end of the pair of first inclined low basis weight regions in the vertical direction. The pants-type absorbent article according to any one of claims 11 to 13, wherein
The absorbent core is disposed on the front side portion,
A first upper low basis weight area having a lower basis weight than the surrounding area along the vertical direction;
A first lower low basis weight area having a lower basis weight than the surrounding area along the vertical direction;
Have
The lower end of the first upper low basis weight area and the upper end of the first inclined low basis weight area are connected,
A pants-type absorbent article, wherein the lower end of the first inclined low basis weight area and the upper end of the first lower low basis weight area are connected. The pants-type absorbent article according to any one of claims 11 to 14, wherein
The absorbent core is disposed on the front side portion,
A second upper low basis weight area having a lower basis weight than the surrounding area along the vertical direction;
The lower end of said 2nd upper side low basic weight area | region and the upper end of said 2nd inclination low basic weight area | region are connected, The underpants-type absorbent article characterized by the above-mentioned.

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