Absorbent article including front pad and rear pad

Abstract

To provide an absorbent article suppressing leak of an excretory substance more than the conventional ones and reducing an environmental load.SOLUTION: A diaper includes a front pad to be disposed on a ventral side of the wearer and a rear pad to be disposed on a dorsal side of the wearer, the absorbent article being usable, with both pads connected at a crotch area C of the wearer. The front pad and the rear pad each include absorbent cores. In the front pad, when the absorbent core of the front pad is virtually bisected in a longitudinal direction, an average basis weight of the absorbent core located on a waist side of the wearer is smaller than an average basis weight of the absorbent core located on the crotch side of the wearer. Alternatively, in the rear pad when the absorbent core of the rear pad is virtually bisected in the longitudinal direction, an average basis weight of the absorbent core located on the waist side of the wearer is larger than the average basis weight of the absorbent core located on the crotch side of the wearer.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an absorbent article having a front pad and a rear pad. [Background technology]

[0002] 2. Description of the Related Art As one type of absorbent article such as a disposable diaper, there is known an absorbent article which is configured so that the portion to be placed in the crotch region of a wearer can be separated into a front side and a rear side, and each of the front side and the rear side has an absorbent body.

[0003] For example, Patent Document 1 describes a diaper that has a front body portion and a rear body portion, and front and rear flap portions extending downward from both body portions, and that can be joined to each other by joining means provided on both flap portions. In the diaper described in this document, the front body portion and the rear body portion, and the front and rear flap portions each have an absorbent body.

[0004] Patent Document 2 describes a pants-type disposable diaper having a front part and a rear part that form a crotch portion, the front part and the rear part being removably joined by a connecting means. In the diaper described in this document, each of the front part and the rear part has an absorbent body.

[0005] Patent Document 3 describes a diaper having a front main body portion, a rear main body portion, and a lower rear extension portion extending downward from a lower portion of the front main body portion, and the front main body portion and the rear main body portion are fixed together by fastening a tape panel provided on the non-skin-facing surface of the rear main body portion to a tape fastener provided on the skin-facing surface of the lower rear extension portion. In the diaper described in this document, the front main body portion and the rear main body portion each have an absorbent body.

[0006] Patent Document 4 describes a disposable diaper that has a front portion having a front body and a crotch portion, and a rear portion having a rear body and a cover portion, and that can connect the cover portion to a connecting tape arranged on the outer surface of the crotch portion. In the diaper described in this document, the front portion and the rear portion each have an absorbent body. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 9-566 [Patent Document 2] JP 2008-29762 A [Patent Document 3] JP 2011-72778 A [Patent Document 4] JP 2019-13603 A Summary of the Invention [Problem to be solved by the invention]

[0008] In an absorbent article that can be separated into a front side and a rear side, the front side absorbent article mainly plays a role of absorbing urine, and the rear side absorbent article mainly plays a role of absorbing feces. However, depending on the liquid absorption capacity of the absorbent body of the front side and the rear side absorbent article and the arrangement position, the absorbent body may not be able to absorb all the wearer's excrement, and the excrement may leak out, for example, from the connection part between the front side absorbent article and the rear side absorbent article. Furthermore, both the front side and the rear side may become soiled by the leaked excrement, and both the front side and the rear side must be replaced every time the wearer excrements, which may result in an increase in the amount of waste disposal.

[0009] Therefore, an object of the present invention is to provide an absorbent article in which leakage of excrement is suppressed more than ever before and which reduces the environmental impact. [Means for solving the problem]

[0010] The present invention has a vertical direction corresponding to the front-to-back direction of a wearer and a horizontal direction perpendicular to the vertical direction, The present invention relates to an absorbent article which has a front pad to be placed on the wearer's stomach side and a rear pad to be placed on the wearer's back side, and which can be used with both pads connected in the crotch region of the wearer. In one embodiment, the front pad and the rear pad each preferably have an absorbent core. In one embodiment, in the front pad, when the absorbent core of the front pad is virtually divided into two equal parts in the longitudinal direction, the average basis weight of the absorbent core located on the wearer's waist side is smaller than the average basis weight of the absorbent core located on the wearer's crotch side; or In the rear pad, when the absorbent core of the rear pad is virtually divided in half in the vertical direction, it is preferable that the average basis weight of the absorbent core located on the wearer's waist side is greater than the average basis weight of the absorbent core located on the wearer's crotch side. Effect of the Invention

[0011] According to the absorbent article of the present invention, leakage of excrement is suppressed more than ever before, and an absorbent article with reduced environmental impact is provided. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing a disposable diaper as one embodiment of the absorbent article of the present invention. [Diagram 2] 2(a) to (c) are perspective views showing an example of how the absorbent article shown in FIG. 1 is used. [Diagram 3] FIG. 3 is a plan view showing a schematic view of the skin-facing surface side of the front pad shown in FIG. 1 in a maximum stretched state. [Figure 4] Figures 4(a) to (c) are cross-sectional views showing schematic cross sections along the horizontal and thickness directions at specific positions of the front pad shown in Figure 3, where Figure 4(a) is a cross-sectional view taken along line II in Figure 3, Figure 4(b) is a cross-sectional view taken along line II-II in Figure 3, and Figure 4(c) is a cross-sectional view taken along line III-III in Figure 3. [Diagram 5] FIG. 5 is a plan view showing a schematic view of the skin-facing surface side of the rear pad shown in FIG. 1 in a maximum stretched state. [Figure 6]Figures 6(a) to (c) are cross-sectional views showing schematic cross sections along the horizontal and thickness directions at specific positions of the front pad shown in Figure 5, where Figure 6(a) is a cross-sectional view taken along line II in Figure 5, Figure 6(b) is a cross-sectional view taken along line II-II in Figure 5, and Figure 6(c) is a cross-sectional view taken along line III-III in Figure 5. [Figure 7] Figure 7(a) is a plan view showing typically the skin-facing side of the front absorbent core in the front pad shown in Figure 3, and Figure 7(b) is a plan view showing typically the skin-facing side of the rear absorbent core in the rear pad shown in Figure 5. [Figure 8] FIG. 8 is a longitudinal sectional view of a wearer wearing the front pad shown in FIG. 3 and the rear pad shown in FIG. 5 connected together. [Figure 9] FIG. 9 is a plan view showing another embodiment of the rear pad shown in FIG. [Figure 10] FIG. 10 is a plan view diagrammatically showing the skin-facing surface side of the rear absorbent core in the rear pad shown in FIG. [Figure 11] 11(a) to 11(d) are plan views each showing a schematic view of the skin-facing surface side of a rear absorbent core in another embodiment of the rear pad shown in FIG. [Figure 12] Figure 12(a) is a plan view showing the skin-facing surface side of the front pad shown in Figure 1 in the maximum stretched state, and Figure 12(b) is a plan view showing the skin-facing surface side of the rear pad shown in Figure 1 in the maximum stretched state. [Figure 13] FIG. 13(a) is a perspective view showing a holder for a disposable diaper which is another embodiment of the absorbent article of the present invention, and FIG. 13(b) is a horizontal cross-sectional view showing the disposable diaper in a worn state. [Figure 14] FIG. 14(a) is a perspective view showing a holder for a disposable diaper which is another embodiment of the absorbent article of the present invention, and FIG. 14(b) is a horizontal cross-sectional view showing the disposable diaper in a worn state. [Figure 15]FIG. 15(a) is a perspective view showing a holder for a disposable diaper which is another embodiment of the absorbent article of the present invention, and FIG. 15(b) is a horizontal cross-sectional view showing the disposable diaper in a worn state. [Figure 16] FIG. 16(a) is a perspective view showing a holder for a disposable diaper which is another embodiment of the absorbent article of the present invention, and FIG. 16(b) is a horizontal cross-sectional view which shows a schematic view of the disposable diaper in a worn state. [Figure 17] Figure 17(a) is a plan view showing a schematic representation of a front pad of a disposable diaper which is yet another embodiment of the absorbent article of the present invention, Figure 17(b) is a plan view showing a schematic representation of a rear pad of the disposable diaper, and Figure 17(c) is a perspective view showing a schematic representation of a holder portion of the disposable diaper in a worn state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will be described below based on preferred embodiments with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. The drawings are basically schematic, and the ratio of dimensions may differ from the actual ones. Figure 1 shows a disposable diaper 1 (hereinafter also simply referred to as "diaper 1"), which is one embodiment of the absorbent article of the present invention.

[0014] The diaper 1 shown in FIG. 1 has a front pad 2 arranged on the wearer's ventral side and a rear pad 3 arranged on the wearer's back side. FIG. 2 shows an example of how the diaper 1 is used. In the diaper 1, first, the waist belt 80 of the rear pad 3 is wrapped around the wearer's waist and overlaps with the waist belt 80, and the overlapping portion is joined via the fastening parts 80d provided at both ends of the waist belt 80 (see FIG. 2(a)). Next, the non-skin-facing surface of the waist belt 80 and the skin-facing surface of the front pad 2 are joined via the front fastening parts 43c, 43s, 43s provided on the skin-facing surface of the front pad 2 (see FIG. 2(b)). Then, the ends of the front pad 2 and the rear pad 3 located on the crotch side of the wearer are joined via the crotch fastening part 70c provided on the skin-facing surface of the rear pad 3 (see FIG. 2(c)). In this state of the diaper 1, the wearer's crotch is in contact with the skin-facing surface of the front pad 2. The diaper 1 can be used in this manner with the front pad 2 and the rear pad 3 connected in the crotch region of the wearer. In the connected state, the diaper 1 has a waist opening WO through which the wearer's torso passes, and a pair of leg openings LO through which the wearer's lower legs pass.

[0015] In this specification, the "skin-facing side" refers to the side of the diaper or its constituent members (e.g., absorbent body) that faces the wearer's skin when the diaper is worn, and the "non-skin-facing side" refers to the side that faces away from the wearer's skin when the diaper is worn.

[0016] The diaper shown in Fig. 1 has a longitudinal direction X corresponding to the front-to-back direction of a wearer and a transverse direction Y perpendicular to the longitudinal direction X. The longitudinal direction X coincides with the longitudinal directions of the front pad 2 and the rear pad 3. When the diaper 1 formed by connecting the two pads is worn, the front pad 2 and the rear pad 3 each have a first end which is one end of both pads in the longitudinal direction X and located on the waist side of the wearer, and a second end which is the other end of both pads in the longitudinal direction X and located on the crotch side of the wearer. In this specification, the term "worn state of diaper 1" refers to, depending on the context, a state in which the front pad 2 and the rear pad 3 are connected in the crotch area of ​​the wearer, a state in which the skin-facing surface of the front pad 2 is in contact with the wearer's abdominal side, or a state in which the skin-facing surface of the rear pad 3 is in contact with the wearer's back.

[0017] 3 and 5, the front pad 2 and the rear pad 3 each have a waist region W located on the wearer's waist side and a crotch region C located on the wearer's crotch side when the diaper 1 is worn. The crotch region C of each of the pads 2 and 3 refers to the region located closest to the first end when the entire length of each of the pads 2 and 3 in the longitudinal direction X is divided into three equal parts. The waist region W of each of the pads 2 and 3 refers to the two regions other than the crotch region C among the three regions. The waist region W of each of the pads 2 and 3 includes the first ends X1 and X3 of the pads 2 and 3. The crotch region C of each of the pads 2 and 3 includes the second ends X2 and X4 of the pads 2 and 3.

[0018] First, the front pad 2 will be described in detail. 3, in a maximum extended state, the front pad 2 has a shape elongated in one direction and an outer shape that is line-symmetrical with respect to a horizontal center line (not shown) that bisects the entire length in the horizontal direction Y and extends in the vertical direction X. When in use, the longitudinal direction of the front pad 2 is aligned with the longitudinal direction of the rear pad 3 when the front pad 2 is previously fitted to the wearer.

[0019] In this specification, the "maximum stretched state" refers to a state in which the elastic members of each part of the wearing article, such as the absorbent article, the front pad 2, the rear pad 3, etc., are stretched to their maximum extent and expanded to the same dimensions as the design dimensions, i.e., the dimensions when spread out flat without any effect of the elastic members. The term "unfolded and maximally stretched state" refers to a state in which the worn article is unfolded flat and then put into the maximally stretched state.

[0020] As shown in Figures 3 and 4, the front pad 2 comprises a front absorbent main body 20, a front crotch horizontal stretch member 30, and a front waist portion 40 arranged on the skin-facing side of the front absorbent main body 20. The waist side edge of the front absorbent main body 20 coincides with the first end X1 of the front pad. The crotch side edge of the front absorbent main body 20 coincides with the second end X2 of the front pad. The front absorbent main body 20 forms the main body of the front pad 2.

[0021] The front absorbent main body 20 comprises a front absorbent body 21 and a front backsheet 22 arranged on the non-skin facing side of the front absorbent body 21. Fig. 4 shows a state in which a front outer sheet 23 is arranged on the non-skin facing side of the front backsheet 22, but in the present invention, the front absorbent main body 20 does not necessarily have to comprise a front outer sheet 23.

[0022] The front outer sheet 23 is disposed continuously over the entire area of ​​the waist region W and the crotch region C of the front absorbent main body 20. The peripheral edge of the front outer sheet 23 forms the outline of the front absorbent main body 20. The front outer sheet 23 is directly joined to the surface of the front backsheet 22 opposite to the surface facing the front absorbent body 21 by a known joining means such as an adhesive. The front exterior sheet 23 may be made of, for example, a nonwoven fabric.

[0023] The front back sheet 22 is located on the non-skin facing side of the front absorbent body 21 and on the skin facing side of the front outer sheet 23. The front back sheet 22 is disposed continuously over the entire waist region W and crotch region C in the front absorbent main body 20. The front back sheet 22 has approximately the same size as the front outer sheet 23. Both end edges in the longitudinal direction X of the front back sheet 22 coincide with both end edges in the longitudinal direction X of the front outer sheet 23. Both side edges of the front back sheet 22 coincide with both side edges of the front outer sheet 23. The peripheral edge of the front back sheet 22 forms the outline of the front absorbent main body 20, similar to the front outer sheet 23. The front backsheet 22, while being joined to the front outer sheet 23, is directly joined to the non-skin facing surface of the front absorbent body 21 by a known joining means such as an adhesive. As the front backsheet 22, for example, a liquid-impermeable or liquid-slightly permeable or water-repellent sheet can be used.

[0024] The front absorbent body 21 has a function of absorbing and retaining excrement such as urine. The front absorbent body 21 has a shape long in the vertical direction X and extends in the vertical direction X from the waist region W to the crotch region C with its longitudinal direction coinciding with the vertical direction X. The front absorbent body 21 includes a front absorbent core 24. The front absorbent core 24 may be, for example, a stack or sheet containing absorbent fibers. The front absorbent core 24 may also be a stack containing absorbent fibers or particles of absorbent polymer. The front absorbent core 24 may also be in the form of a sheet in which particles of absorbent polymer are held between two sheets containing absorbent fibers. Examples of absorbent fibers that can be used include natural fibers such as wood pulp, such as softwood pulp and hardwood pulp, and non-wood pulp, such as cotton pulp and hemp pulp; modified pulp, such as cationic pulp and mercerized pulp (all of these are cellulosic fibers); and hydrophilic synthetic fibers. These can be used alone or in combination of two or more.

[0025] As shown in Fig. 4(b) and Fig. 7(a), the front absorbent core 24 has a two-layer structure including an upper absorbent core 25 and a lower absorbent core 26 located on the non-skin-facing side of the upper absorbent core 25. The upper absorbent core 25 is located in the center of the front pad 2 in the lateral direction Y and extends in the longitudinal direction X. The lower absorbent core 26 is also located in the center of the front pad 2 in the lateral direction Y and extends in the longitudinal direction X. The lower absorbent core 26 has a larger dimension (area) in a plan view than the upper absorbent core 25. 7(a), in a plan view, the upper absorbent core 25 entirely overlaps with the lower absorbent core 26, and the lower absorbent core 26 extends outward from the periphery of the upper absorbent core 25. As a result, the lower absorbent core 26 forms the outline of the front absorbent core 24. The upper absorbent core 25 is located on the skin-facing surface of the lower absorbent core 26, slightly offset from the center in the longitudinal direction X of the lower absorbent core 26 toward the second end X2 (see FIG. 3). With the upper absorbent core 25 and the lower absorbent core 26 configured in this manner, the front absorbent core 24 has a high basis weight section 24B located in the central region of the lateral direction Y of the front pad 2 and extending in the vertical direction, and a low basis weight section 24A having a relatively lower basis weight than the high basis weight section 24B. In the front absorbent core 24 of this embodiment, the high basis weight section 24B is a region where the upper absorbent core 25 and the lower absorbent core 26 overlap in a plan view. The low basis weight section 24A is a region of the lower absorbent core 26 other than the high basis weight section. The upper absorbent core 25 and the lower absorbent core 26 may be bonded to each other with an adhesive, or the upper absorbent core 25 and the lower absorbent core 26 may be separable rather than being integrally and inseparably connected to each other.

[0026] 4(b), the entire surface of the front absorbent core 24, including the skin-facing surface and the non-skin-facing surface, is covered by the front core wrap sheet 27. The front core wrap sheet 27 covers the upper absorbent core 25 and the lower absorbent core 26 as a single sheet. The front core wrap sheet 27 may be, for example, tissue paper made of hydrophilic fibers or liquid-permeable nonwoven fabric.

[0027] 4(b), the front absorbent main body 20 further includes a front topsheet 28 arranged on the skin-facing side of the front absorbent body 21. The front topsheet 28 is arranged continuously over the entire waist region W and crotch region C of the front absorbent main body 20. The front topsheet 28 covers at least the skin-facing surface of the front absorbent body 21, and contacts the wearer's skin when the diaper 1 is worn. The front topsheet 28 has a pair of lateral extensions 28S, 28S extending outward in the lateral direction Y from each side edge of the front absorbent body 21. Each of the lateral extensions 28S covers a side surface of the front absorbent body 21. The end of the lateral extension 28S extends outward in the lateral direction Y, and is joined to the skin-facing surface of the front backsheet 22 by a known joining means such as an adhesive. Therefore, the non-skin-facing surface of the front absorbent body 21 is not covered by the front topsheet 28. The front topsheet 28 may have a single-layer structure, or may have a laminate structure in which one or more types of layers are laminated. The front topsheet 28 may be, for example, a liquid-permeable sheet.

[0028] 4(b), the front absorbent body 20 further includes a sublayer 29 arranged on the skin-facing side of the front absorbent body 21 and on the non-skin-facing side of the front topsheet 28. The sublayer 29 is a component also called a second sheet, intermediate sheet, etc. in this type of absorbent article. The sublayer 29 plays various roles, such as improving liquid permeability from the front topsheet 28 to the front absorbent body 21 and preventing liquid backflow, which is a phenomenon in which excrement absorbed in the front absorbent body 21 moves to the skin-facing side of the front topsheet 28. The sublayer 29 has a rectangular shape elongated in the vertical direction X, and extends in the vertical direction X from the waist region W to the crotch region C with its longitudinal direction aligned with the vertical direction X. The waist side edge of the sublayer 29 substantially coincides with the waist side edge of the upper absorbent core 25 in a plan view. The crotch side edge of the sublayer 29 substantially coincides with the crotch side edge of the upper absorbent core 25 in a plan view. Both side edges of the sublayer 29 are located outward in the horizontal direction Y from both side edges of the upper absorbent core 25 and inward in the horizontal direction Y from both side edges of the lower absorbent core 26 in a plan view. In this specification, "substantially coincident" includes a case where one edge and the other edge completely coincide with each other and a case where the positions of the two edges are separated by 5 mm or less in the vertical direction X or the horizontal direction Y. A hydrophilic and liquid-permeable sheet can be used as the sublayer 29. Examples of such sheets include paper, woven fabric, and nonwoven fabric. These can be used alone or in combination of two or more. The sublayer 29 and the front absorbent body 21 may be joined to each other by an adhesive. Alternatively, the sublayer 29 and the front absorbent body 21 may not be joined to each other, and the two may be separable rather than integrally and inseparably formed. Also, the sublayer 29 and the front topsheet 28 may be joined to each other by an adhesive. Alternatively, the sublayer 29 and the front topsheet 28 may not be joined to each other, and the two may be separable rather than integrally and inseparably formed.

[0029] As shown in Figs. 3 and 4(b), a pair of front three-dimensional cuffs 50, 50 extending along the longitudinal direction X are disposed on both side portions of the skin-facing surface side of the front absorbent main body 20. As shown in Figs. The front three-dimensional cuff 50 includes a rectangular front cuff forming sheet 51 and a first elastic member 52 that is stretchable in the vertical direction X. The front three-dimensional cuff 50 is formed by folding one front cuff forming sheet 51 in half and joining the two opposing front cuff forming sheets 51 together. The first elastic member 52 is disposed between the two opposing front cuff forming sheets 51. Any elastic material that is normally used in this type of absorbent article can be used without any particular limitation as the various elastic members contained in the front pad 2. For example, rubber thread or flat rubber can be used as such an elastic material.

[0030] The front three-dimensional cuff 50 has a front base end 53 where the front three-dimensional cuff 50 is joined by the front back sheet 22 and the front top sheet 28, and a front free end 54 located at a position spaced from the front base end 53. The front base end 53 and the front free end 54 both extend along the longitudinal direction X and are approximately parallel to each other. The front free end 54 is located at the folding line of the front cuff forming sheet 51 folded in half. A first elastic member 52 is disposed along the front free end 54. The front base end 53 is located outward in the lateral direction Y from the front absorbent body 21 in a plan view. The front free end 54 is disposed at a position overlapping the front absorbent body 21 in a plan view. In other words, the front three-dimensional cuff 50 has a tendency to collapse inward in the lateral direction Y so that its inner surface faces the front topsheet 28. When worn, the front three-dimensional cuff 50 collapsed inward in the lateral direction Y comes into close contact with the wearer's skin near the urethral opening, allowing urine to be absorbed more quickly.

[0031] 4(b) and (c), the front three-dimensional cuff 50 has a front standing portion 50s which stands at least in the central region in the longitudinal direction X of the front pad 2 and exhibits elastic stretchability, and a front non-standing portion 50t which is located on the crotch side of the front standing portion 50s and does not exhibit elastic stretchability. In the front standing portion 50s, the front three-dimensional cuff 50 is configured so that, when the diaper 1 is worn, the front base end 53 serves as a standing point and the front free end 54 stands toward the wearer's skin and is bent inward in the lateral direction Y. In the front non-standing portion 50t, the front cuff forming sheet 51 is mostly joined to the skin facing surface of the front top sheet 28 by known joining means such as adhesive. The end of the front cuff forming sheet 51 is joined to the skin facing surface of the front crotch horizontal stretchable member 30 described later by known joining means such as adhesive. As a result, the front non-standing portion 50t does not have standing ability. The front non-standing portion 50t of this embodiment has the front top sheet 28 and the front crotch horizontal stretchable member 30 arranged on its non-skin facing surface side, and is joined to the front absorbent body 20 by the front top sheet 28 and the front crotch horizontal stretchable member 30. In FIG. 4(c), a gap is generated between the front crotch horizontal stretchable member forming sheets 31, 31 in order to illustrate the structure of the front crotch horizontal stretchable member 30, but the front crotch horizontal stretchable member forming sheets 31, 31 are actually in contact with each other.

[0032] As shown in Fig. 4(b), a pair of front leg cuffs 55, 55 are disposed on the skin-facing surface side of the front absorbent main body 20, outward in the lateral direction Y from the pair of front three-dimensional cuffs 50. The front leg cuffs 55 extend along the longitudinal direction X and are formed on both side edges of the front pad 2, which is a portion of the diaper 1 that corresponds to the wearer's legs. These both side edges are located outward in the lateral direction Y from the front three-dimensional cuffs 50. The front leg cuffs 55 include a plurality of sheets extending outward in the lateral direction Y from the front three-dimensional cuffs 50, a front crotch lateral stretchable member forming sheet 31, and a second elastic member 56 fixed between these sheets in a stretched state in the longitudinal direction X. In a region located laterally outwardly of the front standing portion 50s in a plan view, the front leg cuff 55 is formed by a front cuff forming sheet 51 extending outwardly in the laterally Y direction from the front three-dimensional cuff 50, a front back sheet 22 and a front outer sheet 23, and is provided with a second elastic member 56 extending in the vertical direction X between the front cuff forming sheet 51 and the front back sheet 22. In a plan view, the front leg cuff 55, in a region located outward in the lateral direction Y from the front non-standing portion 50t, is formed of a front cuff forming sheet 51 extending outward in the lateral direction Y from the front three-dimensional cuff 50, a front crotch lateral stretchable member 30 including a front crotch lateral stretchable member forming sheet 31, a front back sheet 22, and a front outer sheet 23, and is provided with a second elastic member 56 extending in the longitudinal direction X between the front cuff forming sheet 51 and the front crotch lateral stretchable member forming sheet 31. That is, the front leg cuffs 55 are formed integrally with the front three-dimensional cuffs 50 by the front cuff forming sheet 51 . Alternatively, the front leg cuff 55 may include a front back sheet 22 and a front outer sheet 23 extending outward in the lateral direction Y beyond the front three-dimensional cuff 50, and a second elastic member 56 fixed between these sheets 22, 23.

[0033] 3, the front leg cuff 55 has a front outer stretchable portion 55s that exhibits elastic stretchability due to the second elastic member 56. In the front outer stretchable portion 55s, the second elastic member 56 contracts in the vertical direction X to form leg gathers. The front outer stretchable portion 55s has a plurality of second elastic members 56 extending in the vertical direction X and arranged at intervals in the horizontal direction Y.

[0034] When viewed in plan from the skin-facing surface side, both side edges of the front absorbent main body 20 along the longitudinal direction X are formed by front cuff forming sheets 51. The front cuff forming sheets 51 form front side flap portions (not shown) together with the front backsheet 22 and the front outer sheet 23 on the lateral direction Y outer side of the front absorbent body 21. The front side flap portions are portions of the front absorbent main body 20 that extend outward in the lateral direction Y beyond the front absorbent body 21. The front crotch lateral stretchable members 30 and the front waist portion 40 extend outward in the lateral direction Y beyond the front side flap portions.

[0035] As shown in Fig. 3 and Fig. 4(c), the front pad 2 is provided with a front crotch horizontal stretchable member 30 in the crotch region C. The front crotch horizontal stretchable member 30 is arranged at least in the crotch region C of the front pad 2, and preferably the crotch side edge of the front crotch horizontal stretchable member 30 is arranged closer to the waist side than the second end X2 of the front pad 2. Alternatively, the crotch side edge of the front crotch horizontal stretchable member 30 may be arranged so as to substantially coincide with the second end X2 of the front pad 2. The front crotch horizontal stretchable member 30 has its entire skin-facing surface joined to the front top sheet 28 and the front cuff forming sheet 51. The front crotch horizontal stretchable member 30 has its entire non-skin-facing surface joined to the front back sheet 22. The front crotch horizontal stretchable member 30 is a member that includes two sheets 31, 31 forming the front crotch horizontal stretchable member that are long in the horizontal direction Y, and a third elastic member 32 fixed in a stretched state between the sheets 31, 31 as its constituent materials. The front crotch horizontal stretchable member 30 has a plurality of third elastic members 32 extending in the horizontal direction Y intermittently on both sides in the horizontal direction Y, and does not have the third elastic member 32 in the central part in the horizontal direction Y. Therefore, the front crotch horizontal stretchable member 30 has stretchable regions on both sides in the horizontal direction Y. The central part of the front crotch horizontal stretchable member 30 is a non-stretchable region. Furthermore, as shown in Fig. 3 and Fig. 4(c), the third elastic members 32 do not reach the side edges in the horizontal direction Y of the front crotch horizontal stretchable member forming sheet 31, so that the side regions of the front crotch horizontal stretchable member 30 including the side edges are non-stretchable regions. The front crotch lateral stretchable member 30 has elastic stretchability in the lateral direction Y at both sides due to the third elastic members 32 arranged on both sides in the lateral direction Y. The "central portion in the lateral direction Y" is the central region when the total length of the front absorbent main body 20 in the lateral direction Y is divided into three equal regions.

[0036] The front crotch horizontal stretchable member 30 of this embodiment is wider than the front absorbent main body 20, more specifically than the front backsheet 22 and the front outer sheet 23. Alternatively, both side edges of the front crotch horizontal stretchable member 30 may coincide with both side edges of the front absorbent main body 20, more specifically than the front backsheet 22 and the front outer sheet 23. Alternatively, the front crotch horizontal stretchable member 30 may be narrower than the front absorbent main body 20, more specifically than the front backsheet 22 and the front outer sheet 23. The front crotch horizontal stretchable member 30 of this embodiment extends outward in the lateral direction Y from the lateral Y outer edges (lateral side edges of the front absorbent main body 20) of the front leg cuff 55 in the maximum stretched state.

[0037] As shown in Fig. 3 and Fig. 4(a), the front pad 2 has a front waistline portion 40 in its waist region W. The front waistline portion 40 is disposed at least in the waist region W of the front pad 2, and preferably the waist side edge of the front waistline portion 40 is disposed on the crotch side of the first end X1 of the front pad 2. The front waistline portion 40 includes two front waistline portion forming sheets 41, 41 long in the lateral direction Y, and fourth elastic members 42a, 42b fixed in a stretched state between the sheets 41, 41, like the front crotch horizontal stretch member 30. The front waistline portion 40 has a plurality of fourth elastic members 42a extending in the lateral direction Y intermittently in the longitudinal direction X on both sides in the lateral direction Y. The front waistline portion 40 does not have the fourth elastic member 42a in the central part in the lateral direction Y. The length in the lateral direction Y of the fourth elastic member 42a located on the left side of the front waistline portion 40 (left side of the paper in FIG. 3) is the same as the length in the lateral direction Y of the fourth elastic member 42a located on the right side of the front waistline portion 40 (right side of the paper in FIG. 3). The lengths in the lateral direction Y of the fourth elastic members 42a located on the left side of the front waistline portion 40 are the same. The lengths in the lateral direction Y of the fourth elastic members 42a located on the right side of the front waistline portion 40 are the same. The front waistline portion 40 has a fourth elastic member 42b extending from one side to the other in the lateral direction Y at the end on the crotch side. Although FIG. 3 shows a state in which only one fourth elastic member 42b is included, the number of the fourth elastic members 42b is not limited to one, and may be multiple. In the front waist portion 40, the fourth elastic members 42b are continuously arranged along the end portion on the crotch side, so that the entire area of ​​the front waist portion 40 exhibits elastic stretchability in the lateral direction Y.

[0038] 3, the front waistline portion 40 has a front fixed portion 43 fixed to another component, and a front non-fixed portion 46 not fixed to another component. The "other component" to which the front waistline portion-forming sheet 41 in the front waistline portion 40 is fixed is a component disposed opposite the front waistline portion-forming sheet 41, such as the front topsheet 28 and the front cuff-forming sheet 51. The front waistline portion-forming sheet 41 and the other component are joined by a known joining means such as an adhesive. The front fixed portion 43 includes a front continuous fixed portion 44 in which the fixed portion between the front waistline-forming sheet 41 and other components extends continuously over the entire length of the front absorbent main body 20 in the lateral direction Y, and a front discontinuous fixed portion 45 located on the crotch side of the front continuous fixed portion 44 and adjacent to the front continuous fixed portion 44, in which the fixed portions between the front waistline-forming sheet 41 and other components exist intermittently in the lateral direction Y. In the front discontinuous fixed portion 45, a front non-fixed portion 46 is located between a pair of front fixed regions P1 adjacent in the lateral direction Y. When the front pad 2 is worn or in its natural state, the fourth elastic members 42a, 42b contract to cause the front non-fixed portion 46 of the front waistline-forming sheet 41 to rise toward the wearer's skin. As a result, the front pad 2 forms a front pocket portion 49 having a front internal space 47 defined by the standing front non-fixed portion 46 and the front absorbent main body 20 facing it, and a front opening 48 opening toward the crotch side. When the diaper 1 is worn, if excrement excreted in the crotch region C of the front pad 2 transfers to the waist region W, the excrement can be accommodated in the front internal space 47 of the front pocket 49 through the front opening 48. This makes it possible to prevent excrement from leaking out of the diaper 1 more effectively than in the past. In particular, in this embodiment, the fourth elastic member 42b located at the crotch side is continuously arranged along the crotch side end of the front waist portion 40, so that the contraction of the fourth elastic member 42b can further increase the uprightness of the front opening 48. As a result, the internal space of the front pocket 49 becomes larger, making it possible to further prevent excrement from leaking out of the diaper 1.

[0039] The front waist portion 40 of this embodiment is wider than the front absorbent main body 20, more specifically, wider than the front backsheet 22 and the front outer sheet 23. As a result, in the maximum stretched state, the front waist portion 40 extends outward in the lateral direction Y beyond the lateral Y outer edges (both side edges of the front absorbent main body 20) of the front leg cuffs 55. In addition, in the maximum stretched state, the front waist portion 40 of this embodiment extends outward in the lateral direction Y beyond the front crotch lateral stretchable member 30.

[0040] The front waistline portion 40 has front fastening portions 43c, 43s, 43s at the center in the lateral direction Y and at both sides in the lateral direction Y of the front waistline portion forming sheet 41 on the skin-facing side. More specifically, the front waistline portion 40 has a front central fastening portion 43c between the fourth elastic members 42a located on both sides and closer to the waist than the fourth elastic member 42b located on the crotch side, and has front side fastening portions 43s outward in the lateral direction Y from the fourth elastic members 42a, 42b. These front fastening portions 43c, 43s, 43s are arranged on the skin-facing side of the front waistline portion 40. The front side fastening parts 43s extend along both side edges of the front waist-circumference part-forming sheet 41, and the front central fastening part 43c extends in the lateral direction Y. These front fastening parts 43c, 43s, 43s have male members of a mechanical hook-and-loop fastener on the skin-facing surface. This allows the front fastening parts 43c, 43s, 43s to be detachably fastened to the non-skin-facing surface of the waist belt 80 of the rear pad 3, which will be described later.

[0041] The front pad 2 has a female member (not shown) of a mechanical hook-and-loop fastener on the non-skin facing surface, and the crotch fastening part 70c (see FIG. 5) of the rear pad 3 described later can be detachably fastened to the non-skin facing surface. The material of the female member can be selected according to the shape of the male member of the crotch fastening part 70c. The front pad 2 of this embodiment has a non-skin facing surface formed by the front outer sheet 23, which is made of a nonwoven fabric with high engagement properties.

[0042] Next, the rear pad 3 will be described in detail. The rear pad 3 shown in Fig. 5 has a shape that is long in one direction in the maximum stretched state. The rear pad 3, except for the waist belt 80 described later, has an outer shape that is line-symmetrical with respect to a horizontal center line (not shown) that bisects the entire length in the horizontal direction Y and extends in the vertical direction X. When in use, the vertical direction X of the rear pad 3 is aligned with the height direction of the wearer.

[0043] As shown in Figure 5 and Figures 6(a) to (c), the rear pad 3 comprises a rear absorbent main body 60, a rear crotch horizontal stretch member 70 arranged on the skin-facing side of the rear absorbent main body 60, and a waist belt 80 arranged on the skin-facing side of the rear absorbent main body 60. The waist side edge of the rear absorbent main body 60 coincides with the first end X3 of the rear pad 3. The crotch side edge of the rear absorbent main body 60 coincides with the second end X4 of the rear pad 3. The rear absorbent main body 60 forms the main body of the rear pad 3. From the viewpoint of widely covering the buttocks of the wearer, the rear absorbent main body 60 has a larger dimension than the front absorbent main body 20. This configuration is also applied to each member (such as the absorbent body and the back sheet) of both absorbent main bodies 20, 60.

[0044] In the present embodiment, the length of the second end X4 of the rear pad 3 is longer than the length of the second end X2 of the front pad 2 in the unfolded and maximum stretched state. Meanwhile, the length of the second end X2 of the front pad 2 and the second end X4 of the rear pad 3 are substantially the same in the natural state of the front pad 2 and the rear pad 3. When the front pad 2 and the rear pad 3 are worn, the side edges of the front pad 2 and the rear pad 3 substantially coincide with each other at the leg opening LO. As a result, the front leg cuff 55 and the rear leg cuff 95 are continuously positioned on the same line, and gaps due to misalignment of the leg cuffs 55, 95 are less likely to occur around the legs. As a result, it is possible to suppress leakage of excrement from gaps around the legs. Furthermore, when the front pad 2 and the rear pad 3 are stretched, for example, when both pads 2 and 3 are put on a wearer, the buttocks of the wearer can be widely covered with ease. Such a change in size is due to the configuration of the front pad 2 and the rear pad 3. Specifically, the front pad 2 is provided with a front crotch lateral stretchable member 30 including a third elastic member 32 at least in the crotch region C. The third elastic member 32 stretches and contracts, allowing the crotch region C of the front pad 2 to contract in the lateral direction Y, so that the length of the second end X2 of the front pad 2 in its natural state is shorter than the length of the second end X2 of the front pad 2 in its unfolded and maximum stretched state. As described below, the rear pad 3 is provided with a rear crotch lateral stretchable member 70 including seventh elastic members 72a, 72b at least in the crotch region C. The seventh elastic members 72a, 72b stretch and contract, allowing the crotch region C of the rear pad 3 to contract in the lateral direction Y, so that the length of the second end X4 of the rear pad 3 in its natural state is shorter than the length of the second end X4 of the rear pad 3 in its fully extended and unfolded state. Because the front pad 2 and the rear pad 3 have such a configuration, when both pads 2, 3 are in their natural state, the length of the second end X2 of the front pad 2 and the length of the second end X4 of the rear pad 3 are approximately the same. The front pad 2 and the rear pad 3 may be configured such that, in the worn state, the length of the second end X2 of the front pad 2 and the length of the second end X4 of the rear pad 3 are substantially the same. Alternatively, the front pad 2 and the rear pad 3 may be configured such that, in the worn state, the length of the second end X4 of the rear pad 3 is longer than the length of the second end X2 of the front pad 2.

[0045] In order to configure the front pad 2 and the rear pad 3 in this manner, for example, the contractile force of the rear crotch horizontal stretchable member 70 may be made greater than the contractile force of the front crotch horizontal stretchable member 30 (for example, by increasing the elongation ratio of the seventh elastic members 72a, 72b described below, using a high-fineness elastic material for the seventh elastic members 72a, 72b, increasing the length and number of the seventh elastic members 72a, 72b, etc.), or the constituent members of the crotch region C of the rear pad 3 may be made of a material with lower rigidity than the constituent members of the crotch region C of the front pad 2.

[0046] The rear absorbent main body 60 comprises a rear absorbent body 61, a rear back sheet 62 arranged on the non-skin facing side of the rear absorbent body 61, and a rear outer sheet 63 arranged on the non-skin facing side of the rear back sheet 62.

[0047] The rear outer sheet 63 is disposed continuously over the entire waist region W and crotch region C of the rear absorbent main body 60. The peripheral edge of the rear outer sheet 63 forms the outline of the rear absorbent main body 60. The rear exterior sheet 63 is directly joined to the surface of the rear backsheet 62 opposite to the surface facing the rear absorbent body 61 by a known joining means such as an adhesive. The rear exterior sheet 63 may be made of, for example, a nonwoven fabric.

[0048] The rear back sheet 62 is located on the non-skin facing side of the rear absorbent body 61 and on the skin facing side of the rear outer sheet 63. The rear back sheet 62 is disposed continuously over the entire waist region W and crotch region C in the rear absorbent main body 60. The rear back sheet 62 has approximately the same size as the rear outer sheet 63. Both end edges in the longitudinal direction X of the rear back sheet 62 coincide with both end edges in the longitudinal direction X of the rear outer sheet 63. Both side edges of the rear back sheet 62 coincide with both side edges of the rear outer sheet 63. The peripheral edge of the rear back sheet 62 forms the outline of the rear absorbent main body 60, similar to the rear outer sheet 63. The rear backsheet 62, while being joined to the rear outer sheet 63, is directly joined to the non-skin facing surface of the rear absorbent body 61 by a known joining means such as an adhesive. The rear backsheet 62 may be, for example, a liquid-impermeable or liquid-slightly permeable or water-repellent sheet.

[0049] The rear absorbent body 61 has a function of absorbing and retaining excrement such as feces. The rear absorbent body 61 has a long shape in the vertical direction X, and extends in the vertical direction X from the waist region W to the crotch region C with its longitudinal direction aligned with the vertical direction X. The rear absorbent body 61 includes a rear absorbent core 64. The rear absorbent core 64 may be, for example, a stack or sheet containing absorbent fibers but not containing absorbent polymer. The rear absorbent core 64 may also be a stack containing absorbent fibers or particles of absorbent polymer. The rear absorbent core 64 may also be a sheet material in which particles of absorbent polymer are held between two sheets containing absorbent fibers. "Not containing absorbent polymer" means that the rear absorbent core 64 is not intentionally made to contain absorbent polymer, but it is acceptable for the rear absorbent core 64 to be inevitably mixed with fine particles of polymer derived from absorbent polymer. The absorbent fiber may be made of the same material as the absorbent fiber in the front absorbent body 21. The absorbent fiber in the rear absorbent body 61 may be made of one type alone or a mixture of two or more types. The absorbent fiber in the front absorbent body 21 and the absorbent fiber in the rear absorbent body 61 may be of the same type or different types.

[0050] 7(b), the rear absorbent core 64 has a low basis weight section 65 located in the central region of the rear pad 3 in the lateral direction Y and extending in the longitudinal direction X, and a high basis weight section 66 having a basis weight higher than that of the low basis weight section 65. The high basis weight section 66 has, of its two ends in the longitudinal direction X, a first end 66a located on the waist side of the wearer when the diaper 1 is worn. The high basis weight section 66 also has a second end 65b located on the crotch side of the wearer.

[0051] The low basis weight portion 65 can be formed, for example, by disposing less of the constituent material of the rear absorbent core 64 than the high basis weight portion 66, or by disposing no constituent material of the rear absorbent core 64 at all. In other words, the basis weight of the low basis weight portion 65 may be zero. From the viewpoint of making the low basis weight portion 65 function, for example, as a pocket for storing excrement, and suppressing leakage of the excrement more than in the past, it is preferable that no constituent material of the rear absorbent core 64 is disposed in the low basis weight portion 65. In addition, the high basis weight portion 66 can be formed, for example, by disposing more of the constituent material of the rear absorbent core 64 than in the low basis weight portion 65, or by disposing a plurality of absorbents having the same or different basis weights. In this embodiment, the high basis weight portion 66 is made of an absorbent body of a single layer structure, and no constituent material of the rear absorbent core 64 is disposed in the low basis weight portion 65.

[0052] The entire surface of the rear absorbent core 64, including the skin-facing surface and the non-skin-facing surface, is covered by the rear core wrap sheet 67. The rear core wrap sheet 67 covers the low basis weight portion 65 and the high basis weight portion 66 with one sheet or two sheets, one above and one below. For example, a thin paper made of hydrophilic fibers, an airlaid nonwoven fabric or a spunlace nonwoven fabric containing hydrophilic fibers, or a nonwoven fabric having liquid permeability can be used as the rear core wrap sheet 67. When a highly absorbent sheet is used as the rear core wrap sheet 67, it is preferable because it can absorb the moisture of the excrement contained in the low basis weight portion 65 and further suppress the leakage of the excrement. In this specification, the "highly absorbent sheet" refers to a sheet having a Klemm water absorption height of 30 mm or more. The Klemm water absorption height can be measured in accordance with the test method of JIS P8141. The measurement is performed by cutting the sheet to be measured to a size of 15 mm wide and 100 mm long or more.

[0053] 6(b), the rear absorbent main body 60 further includes a rear topsheet 68 arranged on the skin-facing side of the rear absorbent body 61. The rear topsheet 68 is arranged continuously over the entire waist region W and crotch region C of the rear absorbent main body 60. The rear topsheet 68 covers at least the skin-facing surface of the rear absorbent body 61, and contacts the wearer's skin when the diaper 1 is worn. As shown in FIG. 6(b), the rear topsheet 68 has a pair of lateral extensions 68S, 68S extending outward in the lateral direction Y from each side edge of the rear absorbent body 61. The lateral extensions 68S each cover a side surface of the rear absorbent body 61. In this embodiment, the lateral extensions 68S each cover both side edges of the high basis weight portion 66 of the rear absorbent core 64 on the outer side in the lateral direction Y. The ends of the lateral extensions 68S extend outward in the lateral direction Y and are joined to the skin-facing surface of the rear backsheet 62 by a known joining means such as an adhesive. Therefore, the non-skin-facing surface of the rear absorbent body 61 is not covered by the rear topsheet 68. The rear topsheet 68 may have a single layer structure, or may have a laminate structure in which one or more types of layers are laminated. In the rear topsheet 68 of this embodiment, apertures and uneven portions (not shown) are formed at positions overlapping with the rear absorbent body 61 in a plan view. The apertures are provided in the concave portions of the uneven portions. The rear surface sheet 68 may be, for example, a liquid-permeable sheet.

[0054] As shown in Figs. 5 and 6(b), a pair of rear three-dimensional cuffs 90, 90 extending along the longitudinal direction X are disposed on both side portions of the skin-facing surface side of the rear absorbent main body 60. As shown in Figs. The rear three-dimensional cuff 90 includes a rectangular rear cuff forming sheet 91 and a fifth elastic member 92 that is stretchable in the vertical direction X. The rear three-dimensional cuff 90 is formed by folding one rear cuff forming sheet 91 in half and joining the two opposing rear cuff forming sheets 91 together. The fifth elastic member 92 is disposed between the two opposing rear cuff forming sheets 91. Elastic materials that are normally used in this type of absorbent article can be used without any particular restrictions as various elastic members contained in the rear pad 3. For example, rubber thread or flat rubber can be used as such elastic materials.

[0055] As shown in Fig. 6(b), the rear three-dimensional cuff 90 has a rear base end 93 where the rear three-dimensional cuff 90 is joined by the rear back sheet 62 and the rear top sheet 68, and a rear free end 94 located at a position spaced apart from the rear base end 93. The rear base end 93 and the rear free end 94 both extend along the longitudinal direction X and are approximately parallel to each other. The rear free end 94 is located at the folding line of the rear cuff forming sheet 91 folded in half. A fifth elastic member 92 is disposed along the rear free end 94. The rear base end 93 is disposed at a position overlapping with the rear absorbent body 61 in a plan view. The rear free end 94 is located outward in the lateral direction Y from the rear absorbent body 61 in a plan view. In other words, the rear three-dimensional cuff 90 has a tendency to collapse outward in the lateral direction Y so that its outer surface faces the rear base end 93. In a worn state, the rear three-dimensional cuff 90 collapses outward in the lateral direction Y and extends in a direction away from the anus, so that a space for accommodating stool can be secured while keeping the rear free end 94 in close contact with the skin, thereby further suppressing lateral leakage of stool.

[0056] The rear three-dimensional cuff 90 has a rear standing portion 90s which stands at least in the central region in the longitudinal direction X of the rear pad 3 and exhibits elastic stretchability, and a rear non-standing portion 90t which is located on the crotch side of the rear standing portion 90s and does not exhibit elastic stretchability. In the rear standing portion 90s, the rear three-dimensional cuff 90 is configured so that, when the diaper 1 is worn, the rear base end portion 93 serves as an erection point and a rear free end portion 94 stands toward the wearer's skin and is bent outward in the lateral direction Y. In the rear non-standing portion 90t, the rear cuff forming sheet 91 is joined to the skin-facing surface of the rear topsheet 68 by a known joining means such as an adhesive. As a result, the rear non-standing portion 90t does not have standing properties. In the present embodiment, the rear non-standing portion 90t has a rear crotch horizontal stretchable member 70 arranged on its skin-facing surface side, and is joined to the rear absorbent body 60 by the rear crotch horizontal stretchable member 70. In FIG. 6(c), a gap is generated between the rear crotch horizontal stretchable member 70 and the rear topsheet 68 in order to illustrate the structure of the rear three-dimensional cuff 90, but the rear crotch horizontal stretchable member 70 and the rear topsheet 68 are actually in contact with each other. Similarly, the rear crotch horizontal stretchable member forming sheets 71, 71, which will be described later, are also in contact with each other.

[0057] 5 and 6(b), a pair of rear leg cuffs 95, 95 are disposed on the skin-facing surface side of the rear absorbent main body 60, outward in the lateral direction Y from the pair of rear three-dimensional cuffs 90. The rear leg cuffs 95 extend along the longitudinal direction X and are formed on both side edge portions of the rear pad 3 corresponding to the wearer's legs in the diaper 1. These both side edge portions are located outward in the lateral direction Y from the rear three-dimensional cuffs 90. The rear leg cuffs 95 include a plurality of sheets extending outward in the lateral direction Y from the rear three-dimensional cuffs 90, and a sixth elastic member 96 fixed between these sheets in a stretched state in the longitudinal direction X. The rear leg cuff 95 is formed by a rear cuff forming sheet 91 extending outward in the horizontal direction Y from the rear three-dimensional cuff 90, a rear backsheet 62, and a rear outer sheet 63, and includes a sixth elastic member 96 extending in the vertical direction X between the rear cuff forming sheet 91 and the rear backsheet 62. In other words, the rear leg cuff 95 is formed integrally with the rear three-dimensional cuff 90 by the rear cuff forming sheet 91. Alternatively, the rear leg cuff 95 may include a rear back sheet 62 and a rear outer sheet 63 extending outward in the lateral direction Y beyond the rear three-dimensional cuff 90, and a sixth elastic member 96 fixed between these sheets 62, 63.

[0058] The rear leg cuff 95 has a rear outer stretchable portion 95s that exhibits elastic stretchability due to the sixth elastic members 96. In the rear outer stretchable portion 95s, the sixth elastic members 96 contract in the longitudinal direction X to form leg gathers. A plurality of sixth elastic members 96 extending in the vertical direction X are arranged in the horizontal direction Y at intervals in the rear outer stretchable portion 95s.

[0059] When viewed in plan from the skin-facing surface side, the rear absorbent main body 60 has both side edges along the vertical direction X formed by rear cuff forming sheets 91. The rear cuff forming sheets 91 form side flap portions (not shown) together with the rear backsheet 62 and the rear outer sheet 63 on the outer side in the lateral direction Y of the rear absorbent body 61. The side flap portions are portions of the rear absorbent main body 60 that extend outward in the lateral direction Y beyond the rear absorbent body 61. The rear crotch lateral stretchable members 70 and the waist belt 80 extend outward in the lateral direction Y beyond the side flap portions.

[0060] As shown in Fig. 5 and Fig. 6(c), the rear pad 3 is provided with a rear crotch horizontal stretchable member 70 on the skin-facing side of the crotch region. The rear crotch horizontal stretchable member 70 is arranged at least in the crotch region C of the rear pad 3, and preferably arranged so that the crotch side edge of the rear crotch horizontal stretchable member 70 is approximately aligned with the second end X4 of the rear pad 3. The rear crotch horizontal stretchable member 70 includes two rear crotch horizontal stretchable member forming sheets 71, 71 long in the lateral direction Y, and seventh elastic members 72a, 72b fixed in a stretched state between the sheets 71, 71. The rear crotch horizontal stretchable member 70 has a plurality of seventh elastic members 72a extending in the lateral direction Y at intervals on both sides in the lateral direction Y. The rear crotch horizontal stretchable member 70 does not have the seventh elastic member 72a in the center in the lateral direction Y. The length in the lateral direction Y of the seventh elastic member 72a located on the left side (left side of the paper in FIG. 5) of the rear crotch horizontal stretchable member 70 is the same as the length in the lateral direction Y of the seventh elastic member 72a located on the right side (right side of the paper in FIG. 5) of the rear crotch horizontal stretchable member 70. The seventh elastic members 72a located on the left side of the rear crotch horizontal stretchable member 70 have the same length in the lateral direction Y. The seventh elastic members 72a located on the right side of the rear crotch horizontal stretchable member 70 have the same length in the lateral direction Y. In addition, the rear crotch horizontal stretchable member 70 has a seventh elastic member 72b extending from one side to the other in the lateral direction Y at the end on the waist side. Although FIG. 5 shows a state in which only one seventh elastic member 72b is included, the number of the seventh elastic members 72b is not limited to one, and may be multiple. In the rear crotch horizontal stretchable member 70, the seventh elastic member 72b is arranged continuously along the waist side end, giving the entire rear crotch horizontal stretchable member 70 elastic stretchability in the lateral direction Y.

[0061] The rear crotch horizontal stretchable member 70 has a rear second fixed portion 73 fixed to another component, and a rear second non-fixed portion 76 not fixed to another component. The "other component" to which the rear crotch horizontal stretchable member forming sheet 71 of the rear crotch horizontal stretchable member 70 is fixed is a component disposed opposite the rear crotch horizontal stretchable member forming sheet 71, such as the rear top sheet 68 and the rear cuff forming sheet 91. As shown in Figs. 5 and 6(c) in this embodiment, the rear crotch horizontal stretchable member forming sheet 71 is joined to the skin-facing surface of the rear three-dimensional cuff 90 in the rear second fixed portion 73. The area where the rear crotch horizontal stretchable member forming sheet 71 and the rear cuff forming sheet 91 are joined in the rear second fixed portion 73 is the rear non-standing portion 90t. The rear crotch horizontal stretchable member forming sheet 71 and the other component are joined by a known joining means such as an adhesive. The rear second fixed portion 73 includes a rear second continuous fixed portion 74 in which the fixed portion between the rear crotch horizontal stretchable member forming sheet 71 and other components extends continuously over the entire length of the rear absorbent main body 60 in the horizontal direction Y, and a rear second discontinuous fixed portion 75 located closer to the waist than the rear second continuous fixed portion 74 and adjacent to the rear second continuous fixed portion 74, in which the fixed portions between the rear crotch horizontal stretchable member forming sheet 71 and other components exist intermittently in the horizontal direction Y. In the rear second discontinuous fixed portion 75, a rear second non-fixed portion 76 is located between a pair of rear second fixed regions P2 adjacent in the horizontal direction Y. When the rear pad 3 is worn or in its natural state, the seventh elastic members 72a, 72b contract to cause the rear second non-fixed portion 76 of the rear crotch lateral stretch member forming sheet 71 to stand up towards the wearer's skin. As a result, the rear pad 3 forms a rear second pocket portion 79 having a rear second internal space 77 defined by the standing rear second non-fixed portion 76 and the rear absorbent main body 60 facing it, and a rear second opening 78 opening towards the waist side. When the diaper 1 is worn, excrement discharged into the crotch region C of the rear pad 3 can be received in the rear second internal space 77 of the rear second pocket 79 through the rear second opening 78. This makes it possible to prevent excrement from leaking out of the diaper 1 more effectively than ever before. In particular, in this embodiment, the rear crotch lateral stretchable member forming sheet 71 is joined onto the rear free end 94 of the rear three-dimensional cuff 90 that is collapsed outward in the lateral direction Y, so that the uprightness of the rear second opening 78 can be further improved. As a result, the rear second internal space 77 of the rear second pocket 79 becomes larger, making it possible to further prevent excrement from leaking out of the diaper 1.

[0062] In this embodiment, both side edges of the rear crotch horizontal stretchable member 70 are arranged so as to substantially coincide with both side edges of the rear absorbent main body 60. The crotch side edge of the rear crotch horizontal stretchable member 70 is arranged so as to substantially coincide with the crotch side edge of the rear absorbent main body 60, i.e., the second end X4 of the rear pad 3.

[0063] As shown in Fig. 5, the rear crotch horizontal stretchable member 70 has a crotch fastening part 70c at the center in the horizontal direction Y of the rear crotch horizontal stretchable member forming sheet 71 on the skin-facing side. More specifically, the rear crotch horizontal stretchable member 70 has the crotch fastening part 70c between the seventh elastic members 72a located on both sides and on the crotch side of the seventh elastic member 72b located on the waist side. The crotch fastening part 70c extends in the horizontal direction Y. The crotch fastening part 70c has a male member of a mechanical hook-and-loop fastener on the skin-facing surface. This allows the rear pad 3 to be detachably fastened to the non-skin-facing surface (front outer sheet 23) of the front pad 2 by the crotch fastening part 70c.

[0064] As shown in Figs. 5 and 6(a), the rear pad 3 is provided with a waist belt 80 in its waist region W. The waist belt 80 includes a central sheet portion 81 located in the center of the belt 80 in the lateral direction Y and extending in the lateral direction Y, a pair of stretchable panels 81p, 81p arranged on both sides of the central sheet portion 81 in the lateral direction Y, a connecting fastening sheet portion 81s provided outside one of the stretchable panels 81p in the lateral direction Y, and a connecting fastened sheet portion 81t provided outside the other of the stretchable panels 81p in the lateral direction Y. In the waist belt 80 shown in FIG. 5, the connecting fastened sheet portion 81t, the stretchable panel 81p, the central sheet portion 81, the stretchable panel 81p, and the connecting fastening sheet portion 81s are connected from left to right along the lateral direction Y. The connecting fastened sheet portion 81t, the pair of stretchable panels 81p, 81p, the central sheet portion 81, and the connecting fastening sheet portion 81s are each formed of a fiber sheet such as a nonwoven fabric. Alternatively, the waist belt 80 may not have the central sheet portion 81, and may be formed of a pair of stretchable panels 81p, 81p, a connecting fastening sheet portion 81s, and a connecting fastened sheet portion 81t.

[0065] In the waist belt 80 of this embodiment, the waist side edge of the central sheet portion 81 coincides with the first end X3 of the rear pad 3. The waist side edges of the pair of stretchable panels 81p are located closer to the crotch than the first end X3 of the rear pad 3. The waist side edge of the connected fastening sheet portion 81t coincides with the waist side edge of the stretchable panel 81p, and the crotch side edge coincides with the crotch side edge of the stretchable panel 81p. The waist side edge of the connected fastening sheet portion 81s is located closer to the crotch than the waist side edge of the stretchable panel 81p, and the crotch side edge is located closer to the waist than the crotch side edge of the stretchable panel 81p. Therefore, although the waist side edge of the connecting and fastening sheet portion 81t and the waist side edge of the stretch panel 81p are aligned, the waist side edges of the stretch panel 81p, central sheet portion 81, and connecting and fastening sheet portion 81s that comprise the stretch panel 81p and the connecting and fastening sheet portion 81s do not match. Alternatively, the waist side edges of the pair of stretch panels 81p may coincide with the first end X3 of the rear pad 3. In addition, the waist side edge of the connecting fastening sheet portion 81t may coincide with the waist side edge of the stretch panel 81p. In addition, the waist side edge of the connecting fastening sheet portion 81s may coincide with the waist side edge of the stretch panel 81p.

[0066] The central sheet portion 81 shown in FIG. 5 is located at the end of the rear absorbent body 60 on the waist side on the skin-facing surface side. The central sheet portion 81 includes two sheets 82a long in the lateral direction Y and an eighth elastic member 82b fixed in a stretched state between these sheets 82a. In the stretch panel 81p, a plurality of eighth elastic members 82b extending in the lateral direction Y are intermittently arranged in the longitudinal direction X. The eighth elastic members 82b are arranged so as to extend continuously from one side of the lateral direction Y to the other side along the crotch side end. In the stretch panel 81p, the eighth elastic members 82b arranged at the crotch side end provide elastic stretchability in the lateral direction Y.

[0067] The central sheet portion 81 in the waist belt 80 has a rear first fixed portion 83 fixed to another component member and a rear first non-fixed portion 86 not fixed to another component member, similar to the rear crotch horizontal stretchable member 70. The "other component member" to which the sheet 82a in the central sheet portion 81 is fixed is a component member disposed opposite the sheet 82a, such as the rear topsheet 68 and the rear cuff forming sheet 91. The sheet 82a and the other component members are joined by known joining means such as adhesives, fusion, ultrasonic waves, etc.

[0068] The rear first fixed portion 83 includes a rear first continuous fixed portion 84 in which the fixed portion between the central sheet portion 81 and other components extends continuously over the entire length of the rear absorbent main body 60 in the lateral direction Y, and a rear first discontinuous fixed portion 85 located on the crotch side of the rear first continuous fixed portion 84 and adjacent to the rear first continuous fixed portion 84, in which the fixed portions between the central sheet portion 81 and other components exist intermittently in the lateral direction Y. In the rear first discontinuous fixed portion 85, a rear first non-fixed portion 86 is located between a pair of rear first fixed regions P3 adjacent to each other in the lateral direction Y.

[0069] When the rear pad 3 is worn or in its natural state, the contraction of the eighth elastic member 82b causes the first rear non-fixed portion 86 of the central sheet portion 81 to stand up toward the wearer's skin. As a result, the rear pad 3 forms a first rear pocket portion 89 having a first rear internal space 87 defined by the standing first rear non-fixed portion 86 and the rear absorbent main body 60 facing it, and a first rear opening portion 88 opening toward the crotch side.

[0070] When the diaper 1 is worn, if excrement excreted in the crotch region C of the rear pad 3 transfers to the waist region W, the excrement can be received in the first rear inner space 87 of the first rear pocket 89 through the first rear opening 88. This makes it possible to prevent excrement from leaking out of the diaper 1 more effectively than in the past.

[0071] The connected and fastened sheet part 81t shown in Fig. 5 is joined to the outer end part in the lateral direction Y of one of the stretchable panels 81p by a known joining means such as adhesive, fusion, ultrasonic waves, etc. The non-skin facing surface of the connected and fastened sheet part 81t is made of a nonwoven fabric with high interlocking properties, similar to the rear outer sheet 63. That is, the connected and fastened sheet part 81t has a female member of a mechanical hook-and-loop fastener on the non-skin facing surface. The connecting and fastening sheet part 81s shown in Fig. 5 has a fastening part 81d having a male member of a mechanical hook-and-loop fastener at the lateral outer end of the skin-facing surface. The non-skin-facing surface of the connecting and fastening sheet part 81s is also made of a nonwoven fabric with high engagement properties. That is, the connecting and fastening sheet part 81s has a female member of a mechanical hook-and-loop fastener on the non-skin-facing surface.

[0072] The fastening portion 81d of the connecting fastening sheet portion 81s can be detachably fastened to the non-skin facing surface of the connecting fastened sheet portion 81t. The waist belt 80 becomes annular by fastening the fastening portion 81d of the connecting fastening sheet portion 81s to the connecting fastened sheet portion 81t. In this annular state, the non-skin facing surfaces of the connecting fastening sheet portion 81s and the connecting fastened sheet portion 81t each have the female member, so that the front center fastening portion 43c and the front side fastening portion 43s provided on the front waist portion 40 of the front pad 2 can be detachably fastened. This allows the waist side end of the front pad 2 to be attached to the annular waist belt 80. Furthermore, the annular waist belt 80 has a pair of stretchable panels 81p that stretch in the circumferential direction, so that it fits well around the waist of the wearer.

[0073] An example of how the diaper 1 is used is shown in Fig. 2. The diaper 1 has a front pad 2 and a rear pad 3 that can be connected via the fastening parts described above, and therefore has a reduced environmental impact compared to conventional diapers. In conventional diapers, the part corresponding to the wearer's stomach (front pad part) and the part corresponding to the wearer's back (rear pad part) are constructed as one inseparable unit, so that when disposing of the diaper after use, even if the rear pad part is not soiled, it is necessary to dispose of the diaper together with the front pad part soiled with excrement. However, in the diaper 1, the front pad 2 and the rear pad 3 are constructed separately, so that when disposing of the diaper after use, only one of the pads soiled with excrement can be replaced. As a result, the amount of waste and carbon dioxide emissions can be reduced, which contributes to reducing the environmental impact.

[0074] One of the features of the diaper of the present invention is the relationship between the average basis weights of the absorbent cores in the front pad 2 and the rear pad 3. Specifically, the diaper 1 is configured such that, when the front absorbent core 24 in the front pad 2 is virtually divided in half in the longitudinal direction X, the average basis weight of the absorbent core located on the wearer's waist side is smaller than the average basis weight of the absorbent core located on the wearer's crotch side. When the diaper 1 is worn, the front pad 2 mainly plays a role in absorbing excrement such as urine. By making the average basis weight of the front absorbent core 24 smaller on the waist side, i.e., larger on the crotch side, the liquid absorption ability of the front pad 2 on the crotch side can be improved. This allows the front absorbent core 24 to absorb excrement more effectively, and as a result, leakage of excrement from, for example, the connecting portion between the front pad 2 and the rear pad 3 and the side of the diaper 1 can be more suppressed than before. Furthermore, since leakage of excrement is more suppressed than before, the excrement is less likely to move from the front pad 2 to the rear pad 3 via the connecting portion between the front pad 2 and the rear pad 3, and therefore the rear pad 3 can be prevented from becoming soiled during urination. This means that only the front pad 2 needs to be replaced when urination occurs, and as a result, the amount of waste disposal can be reduced, and the environmental load can be reduced.

[0075] When the front absorbent core 24 is virtually divided into two equal parts in the vertical direction X, the absorbent core located on the wearer's waist side is the first absorbent core D1, and the absorbent core located on the wearer's crotch side is the second absorbent core D2. The ratio of the average basis weight of the first absorbent core D1 to the second absorbent core D2 is preferably 0.65 or more, more preferably 0.70 or more, and even more preferably 0.75 or more. The ratio of the average basis weight of the first absorbent core D1 to the second absorbent core D2 is preferably 0.95 or less, more preferably 0.90 or less, and even more preferably 0.85 or less. By having such an average basis weight ratio, it is possible to suppress the leakage of excrement more than before and reduce the environmental load.

[0076] From the viewpoint of suppressing leakage of excrement more than ever before and reducing the environmental impact, the average basis weight of the first absorbent core D1 is preferably 200 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 More preferably, 300 g / m 2 More preferably, 400 g / m 2 The average basis weight of the first absorbent core D1 is preferably 900 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 Less than 800g / m 2 More preferably, 700 g / m 2 The following is the result.

[0077] From the viewpoint of suppressing leakage of excrement more than ever before and reducing the environmental impact, the average basis weight of the second absorbent core D2 is preferably 300 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 More preferably, 400 g / m 2 More preferably, 500 g / m 2 The average basis weight of the second absorbent core D2 is preferably 1100 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 Less than 1000g / m 2 More preferably, 900 g / m or less 2 The following is the result.

[0078] The diaper 1 of this embodiment is configured so that, in addition to or instead of the average weight of the front absorbent core 24 satisfying the above-mentioned relationship, the average weight of the rear absorbent core 64 satisfies the following relationship: Specifically, the diaper 1 is configured so that, in the rear pad 3, when the rear absorbent core 64 is virtually divided into two equal parts in the longitudinal direction X, the average weight of the absorbent core located on the wearer's waist side is greater than the average weight of the absorbent core located on the wearer's crotch side. When the diaper 1 is worn, the rear pad 3 mainly absorbs excrement such as feces. By making the average basis weight of the rear absorbent core 64 larger on the waist side, i.e., smaller on the crotch side, the absorbent core located on the crotch side plays the role of a pocket for accommodating excrement. This makes it difficult for excrement excreted on the skin-facing surface side of the rear pad 3 to move from the second end W4 side of the rear pad 3 to the first end X3 side, so that leakage of excrement from the first end X3 can be suppressed more than ever before. In addition, leakage of excrement from, for example, the joint between the front pad 2 and the rear pad 3, the side of the diaper 1, etc. can be suppressed more than ever before. Furthermore, since leakage of excrement is suppressed more than ever before, it becomes difficult for the excrement to move from the rear pad 3 to the front pad 2 via the joint between the front pad 2 and the rear pad 3, so that soiling of the front pad 2 during defecation can be prevented. As a result, when defecation occurs, it is only necessary to replace the rear pad 3, and as a result, the amount of waste generated can be reduced, and the environmental load can be reduced.

[0079] When the rear absorbent core 64 is virtually divided into two equal parts in the vertical direction X, the absorbent core located on the wearer's waist side is the third absorbent core D3, and the absorbent core located on the wearer's crotch side is the fourth absorbent core D4. The ratio of the average basis weight of the fourth absorbent core D4 to the third absorbent core D3 is preferably 0.2 or more, more preferably 0.3 or more, and even more preferably 0.4 or more. The ratio of the average basis weight of the fourth absorbent core D4 to the third absorbent core D3 is preferably 0.9 or less, more preferably 0.85 or less, and even more preferably 0.8 or less. By having such an average basis weight ratio, it is possible to suppress the leakage of excrement more than before and reduce the environmental load.

[0080] From the viewpoint of suppressing leakage of excrement more than before and reducing the environmental impact, the average basis weight of the third absorbent core D3 is preferably 100 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 More preferably, 150 g / m 2More preferably, 200 g / m 2 The average basis weight of the third absorbent core D3 is preferably 600 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 Less than 500g / m 2 More preferably, 400 g / m 2 The following is the result.

[0081] From the viewpoint of suppressing leakage of excrement more than before and reducing the environmental load, the average basis weight of the fourth absorbent core D4 is preferably 50 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 More preferably, 100 g / m 2 More preferably, 150 g / m 2 The average basis weight of the fourth absorbent core D4 is preferably 500 g / m2, provided that the above-mentioned average basis weight ratio is satisfied. 2 Less than 400 g / m 2 More preferably, 300 g / m or less 2 The following is the result.

[0082] The average basis weight of the absorbent core can be measured by the following method. First, the front absorbent core and the rear absorbent core are taken out from the front pad and the rear pad, respectively, using a single-edged razor manufactured by Feather Safety Razor Co., Ltd. If the absorbent core has a laminated structure, this is done carefully so as not to collapse the laminated structure. The obtained front absorbent core and the rear absorbent core are each cut into two equal parts in the vertical direction at a position where the vertical length of the absorbent core is half. If the absorbent core has a laminated structure, the laminated structure is also cut. If the absorbent core includes a low basis weight portion, the "vertical length of the absorbent core" refers to the length including the low basis weight portion. The mass of each absorbent core piece obtained by cutting is measured using an electronic balance (electronic balance GR-300 manufactured by A&D Co., Ltd., accuracy: four decimal places). The measured mass is divided by the area of ​​each absorbent core piece to calculate the average basis weight of the absorbent core piece. If the absorbent core includes a low basis weight portion, the "area of ​​each absorbent core piece" refers to the area including the low basis weight portion. The calculated average basis weight is the average basis weight of the front pad and the rear pad. In this embodiment, specifically, the "area of ​​each absorbent core piece" in the front absorbent core 24 shown in Fig. 7(a) is the area of ​​the first absorbent core D1 and the area of ​​the second absorbent core D2 obtained by dividing the lower absorbent core 26 forming the outline of the front absorbent core 24 in half in the vertical direction X at a position where the length of the lower absorbent core 26 in the vertical direction X is half. The "area of ​​each absorbent core piece" in the rear absorbent core 64 shown in Fig. 7(b) is the area of ​​each rectangle obtained by dividing the high basis weight part 66 forming a part of the outline of the rear absorbent core 64 in half in the vertical direction X at a position where the length of the high basis weight part 66 in the vertical direction X is half.

[0083] Preferred embodiments for achieving the above-mentioned average basis weight ratio include, but are not limited to, (i) a form in which the absorbent cores in the front pad and the rear pad have a predetermined shape, and (ii) a form in which the constituent materials of the absorbent cores in the front pad and the rear pad are different in each region. Any one of these embodiments may be adopted alone, or these may be adopted in combination. In the diaper 1, it is preferable to adopt embodiment (i) from the viewpoint of easily achieving the above-mentioned average basis weight ratio.

[0084] The embodiment (i) will be described below, but the present invention is not limited to the following configuration. First, the front absorbent core 24 in the front pad 2 will be described. As shown in FIG. 7( a ), the front absorbent core 24 has a two-layer structure including an upper absorbent core 25 and a lower absorbent core 26 . The upper absorbent core 25 is composed of an upper first portion 25a and an upper second portion 25b. The upper first portion 25a and the upper second portion 25b are both rectangular. The upper first portion 25a and the upper second portion 25b are connected in this order, with the upper first portion 25a located on the waist side and the upper second portion 25b located on the crotch side. The rectangular upper layer second portion 25b has long sides extending in the horizontal direction Y and short sides extending in the vertical direction X. The length of the long sides of the upper layer second portion 25b is shorter than the length of the edge of the front absorbent core 24 on the crotch side. Upper layer first portion 25a has a rectangular shape and has short sides extending in horizontal direction Y and long sides extending in vertical direction X. A part of the short side of upper layer first portion 25a is shared with a long side of upper layer second portion 25b. The length of the short side of upper layer first portion 25a is shorter than the length of the long side of upper layer second portion 25b. When the upper absorbent core 25 consisting of the upper first portion 25a and the upper second portion 25b is viewed as a whole, the length of the upper absorbent core 25 in the lateral direction Y changes at the boundary between the upper first portion 25a and the upper second portion 25b.

[0085] In the central region of the upper layer first portion 25a in the lateral direction Y of the upper layer absorbent core 25, a narrow upper layer opening 25c is formed so as to extend in the longitudinal direction X, penetrating the upper layer absorbent core 25 in the thickness direction. The crotch side edge of the upper layer opening 25c is located closer to the waist than the short side of the crotch side of the upper layer first portion 25a. The waist side edge of the upper layer opening 25c is located closer to the crotch side than the short side of the waist side of the upper layer first portion 25a. The upper layer opening 25c is a space where no absorbent core is present, and is disposed at least in the waist region W of the front pad. Although Fig. 3 and Fig. 7(a) show a state in which the upper layer opening 25c is formed only in the central region of the upper layer first portion 25a in the lateral direction Y, the formation position of the upper layer opening 25c is not limited to the upper layer first portion 25a. The upper layer opening 25c may be formed only in the central region of the upper layer second portion 25b in the lateral direction Y. Alternatively, the upper layer opening 25c may be formed in the central regions of the upper layer first portion 25a and the upper layer second portion 25b in the lateral direction Y so as to straddle them.

[0086] The lower absorbent core 26 is composed of a lower first portion 26a and a lower second portion 26b. The lower first portion 26a is rectangular. The lower second portion 26b is flattened hexagonal. The lower first portion 26a and the lower second portion 26b are connected in this order, with the lower first portion 26a located closest to the waist and the lower second portion 26b located closest to the crotch. The rectangular lower layer first portion 26a has long sides extending in the horizontal direction Y and short sides extending in the vertical direction X. The lower layer second portion 26b, which is a flat hexagon, has a pair of side edges 26c, 26c extending in the longitudinal direction X, a pair of end edges 26d, 26e extending in the transverse direction Y, and a pair of oblique edges 26f, 26f connecting the side edges 26c and the end edges 26d. The pair of side edges 26c, 26c are parallel to each other and have the same length. The pair of end edges 26d, 26e are parallel to each other. The end edge 26d is shorter than the end edge 26e. The end edge 26d on the crotch side of the lower layer second portion 26b forms the crotch side edge of the front absorbent core 24. A part of the long side of the lower layer first portion 26a is shared with the end side 26e of the lower layer second portion 26b. The length of the long side of the lower layer first portion 26a is longer than the length of the end side 26e of the lower layer second portion 26b. The waist side long side of the lower layer first portion 26a forms the waist side edge of the front absorbent core 24.

[0087] By adopting such a shape for the front absorbent core 24, the front absorbent core 24 achieves the above-mentioned average basis weight ratio. Specifically, as shown in Fig. 7(a), when a first virtual line A1 is taken as a line that bisects the front absorbent core 24 in the longitudinal direction X, the average basis weight of the first absorbent core D1 located on the wearer's waist side is smaller than the average basis weight of the second absorbent core D2 located on the wearer's crotch side.

[0088] Next, the absorbent core in the rear pad will be described. As shown in FIG. 7( b ), the rear absorbent core 64 has a low basis weight portion 65 and a high basis weight portion 66 . The high basis weight portion 66 is composed of a rear first portion 64a, a rear second portion 64b, and a rear third portion 64c. The rear first portion 64a, the rear second portion 64b, and the rear third portion 64c are all rectangular. The rear first portion 64a, the rear second portion 64b, and the rear third portion 64c are connected in this order in the lateral direction Y, and the rear second portion 64b is located between the rear first portion 64a and the rear third portion 64c.

[0089] As shown in FIG. 7(b), the rectangular rear first portion 64a, rear second portion 64b, and rear third portion 64c each have a horizontal side extending in the horizontal direction Y and a vertical side extending in the vertical direction X. The horizontal sides located on the waist side in the first rear region 64a, the second rear region 64b and the third rear region 64c are shared with each other and form a straight line 66a extending in the horizontal direction Y. The straight line 66a forms a first end of the rear absorbent core 64 located on the waist side. The horizontal sides of the rear first portion 64a and the rear third portion 64c have the same length and are shorter than the horizontal side of the rear second portion 64b. The vertical sides of the rear first portion 64a and the rear third portion 64c have the same length and are longer than the vertical side of the rear second portion 64b. As a result, the rear first region 64a and the rear third region 64c extend beyond the crotch side horizontal edge 66b of the rear second region 64b to the crotch side. The crotch side horizontal edge 66c of the rear first region 64a and the rear third region 64c form a part of the second end located on the crotch side of the rear absorbent core 64. Therefore, the high basis weight portion 66 has a substantially inverted U-shape.

[0090] The horizontal side 66c extends to or near the second end X4 (see FIG. 5) of the rear pad 3. FIGS. 5 and 7(b) show a state in which the second end, which is the horizontal side 66c, extends to the vicinity of the second end X4 of the rear pad 3. The distance between the horizontal side 66c and the second end X4 can be set to, for example, not less than 0 mm and not more than 60 mm.

[0091] 7(b), the rear first region 64a and the rear third region 64c that form part of the high basis weight portion 66 extend beyond the horizontal side 66b of the rear second region 64b to the crotch side. In this embodiment, a rectangular region that is located between the rear first region 64a and the rear third region 64c and is located on the crotch side of the horizontal side 66b of the rear second region 64b is the low basis weight portion 65. The low basis weight portion 65 has a horizontal side extending in the horizontal direction Y and a vertical side extending in the vertical direction X. The horizontal side 65b on the crotch side of the low basis weight portion 65 forms a second end located on the crotch side of the low basis weight portion 65. The length of the horizontal side 65b is the same as the length of the horizontal side 66b on the crotch side of the rear second portion 64b. The horizontal side 66c on the crotch side of the rear first portion, the horizontal side 65b of the low basis weight portion 65, and the horizontal side 66c on the crotch side of the rear third portion are in the same position when the rear absorbent core 64 is viewed along the longitudinal direction X. That is, these horizontal sides 66c, 65b, 66c are located on the same straight line in the lateral direction Y in this order, and form a second end located on the crotch side of the rear absorbent core 64. The horizontal side 65b extends to the second end X4 (see FIG. 5) of the rear pad 3 or to the vicinity thereof. 5 and 7(b) show a state in which the second end, which is the horizontal side 65b, extends to the vicinity of the second end X4 of the rear pad 3. The distance between the horizontal side 65b and the second end X4 can be set to, for example, not less than 0 mm and not more than 60 mm. The horizontal side 65a on the waist side of the low basis weight portion 65 forms a first end located on the waist side of the low basis weight portion 65. The horizontal side 65a of the low basis weight portion 65 and the horizontal side 66b on the crotch side of the second rear region 64b are shared by each other. The vertical side 65c on the left side (left side of the paper in FIG. 7(b)) of the low basis weight portion 65 forms part of the vertical side of the rear first portion 64a. The vertical side 65c on the right side (right side of the paper in FIG. 7(b)) of the low basis weight portion 65 forms part of the vertical side of the rear third portion 64c.

[0092] By adopting such a shape for the rear absorbent core 64, the rear absorbent core 64 achieves the above-mentioned average basis weight ratio. Specifically, when a line that bisects the rear absorbent core 64 in the longitudinal direction X is taken as a second virtual line A2, as shown in Fig. 7(b), the average basis weight of the third absorbent core D3 located on the wearer's waist side is greater than the average basis weight of the fourth absorbent core D4 located on the wearer's crotch side.

[0093] Furthermore, the front pad 2 and the rear pad 3 having such a front absorbent core 24 and rear absorbent core 64 can be positioned so that the absorbent body of each pad can easily abut against the wearer's excretory area when the two pads 2, 3 are connected, which also makes it possible to suppress leakage of excrement more than ever before.

[0094] In order to make the above advantages more pronounced, as shown in FIG. 7(b), when the length of the vertical side of the rear first portion 64a and the rear third portion 64c is L1 and the length of each of the rear first portion 64a and the rear third portion 64c extending from the horizontal side 66b of the rear second portion 64b toward the crotch side is L2, it is preferable to set the value of L1 / L2 to 1.0 or more and 4.0 or less, more preferably to 1.2 or more and 2.5 or less, and even more preferably to 1.3 or more and 1.7 or less.

[0095] From a similar viewpoint, when the length of the horizontal side 66b of the rear second portion 64b is W1 and the length of the horizontal side 66c of the rear first portion 64a and the rear third portion 64c is W2, it is preferable to set the value of W1 / W2 to be 2.0 or more and 8.0 or less, more preferably 2.8 or more and 7.0 or less, and even more preferably 3.5 or more and 6.0 or less.

[0096] In addition, by adopting the above-mentioned shape for the rear absorbent core 64, the rear pad 3 has an uneven structure on the skin-facing surface as shown in FIG. 6(b). In detail, in this embodiment, the high basis weight portion 66 is made of an absorbent body of a single layer structure, whereas the low basis weight portion 65 does not contain any of the constituent materials of the rear absorbent core 64. As a result, when the rear pad 3 is viewed as a whole, the thickness of the rear pad 3 in the region where the high basis weight portion 66 is arranged is greater than the thickness of the rear pad 3 in the region where the low basis weight portion 65 is arranged. Since the low basis weight portion 65 is located between the rear first portion 64a (see FIG. 7(b)) and the rear third portion 64c (see FIG. 7(b)), a step is generated between the low basis weight portion 65 and the rear first portion 64a, and between the low basis weight portion 65 and the rear third portion 64c. With the rear pad 3 configured in this way, the area of ​​the rear pad 3 where the low basis weight portion 65 is located and the thickness of the rear pad 3 is reduced can more easily function as a pocket for storing body waste. This makes it easier to prevent body waste from leaking out of the rear pad 3 than ever before.

[0097] The difference in thickness in the rear pad 3 can be achieved by disposing the constituent material of the rear absorbent core 64 in the high basis weight portion 66 and not disposing it in the low basis weight portion 65, and by making the thickness of the rear topsheet 68 smaller than the thickness of the high basis weight portion 66 of the rear absorbent core 64. Alternatively, when the constituent material of the rear absorbent core 64 is disposed in the low basis weight portion 65, the amount of the constituent material disposed in the low basis weight portion 65 is made smaller than the amount of the constituent material disposed in the high basis weight portion 66, and by making the thickness of the rear topsheet 68 smaller than the thickness of the high basis weight portion 66 of the rear absorbent core 64. Alternatively, the difference in thickness can be achieved by embossing the constituent material of the low basis weight portion 65 to provide a compressed portion where the low basis weight portion 65 is pressurized.

[0098] FIG. 8 shows a sagittal view of a wearer wearing the diaper 1. As shown in the figure, the diaper 1 of this embodiment is configured so that, when the diaper 1 is worn, the high basis weight portion 24B of the front absorbent core 24 in the front pad 2 can connect the front pad 2 and the rear pad 3 so as to cover the urethral opening Q1 of the wearer. This allows the high basis weight portion 24B, which has a relatively high liquid absorption capacity in the front absorbent core 24, to absorb excrement particularly effectively, making it easier to prevent excrement from leaking out of the front pad 2 than in the past. This means that only the front pad 2 needs to be replaced when urinating, which results in a reduction in the amount of waste and a reduction in the environmental impact.

[0099] Furthermore, the diaper 1 of this embodiment is configured so that the front pad 2 and the rear pad 3 can be connected together such that the low basis weight portion 65 of the rear pad 3 covers the wearer's anus Q2 when the diaper 1 is worn. This allows the low basis weight portion 65 of the rear pad 3 to function as a pocket for storing bodily waste, making it easier to prevent the bodily waste from leaking out of the rear pad 3 than ever before. This means that it is only necessary to replace the rear pad 3 when defecation occurs, which results in a reduction in the amount of waste generated and a reduction in the environmental impact.

[0100] Furthermore, the diaper 1 of this embodiment is configured so that the front pad 2 and the rear pad 3 can be connected together such that, when the diaper 1 is worn, the second end X2 (see FIG. 3) of the front pad 2 does not extend beyond the first end 65a of the low basis weight portion 65 of the rear pad 3 and overlap with the high basis weight portion 66. This allows the thickness of the diaper 1 to be thinner than when the second end X2 of the front pad 2 extends beyond the first end 65a of the low basis weight portion 65 of the rear pad 3 and overlaps with the high basis weight portion 66. As a result, the wearer is less likely to feel irritation to the skin caused by overlapping components of the diaper 1, and the wearing comfort of the diaper 1 can be easily improved.

[0101] The shape of the absorbent core of the front pad 2 and the rear pad 3 can be appropriately changed within a range in which the above-mentioned average basis weight ratio can be achieved. Fig. 9 shows another embodiment of the rear pad 3 in the diaper 1 of the present invention. Regarding the embodiment of the rear pad 3 shown in the figure, the configurations different from those of the rear pad 3 shown in Fig. 5 and Fig. 6 will be mainly described, and the same configurations as those of the rear pad 3 will be denoted by the same reference numerals and will not be described. Furthermore, for the configurations not specifically described in the embodiment of the rear pad 3 shown in the figure, the description of the rear pad 3 shown in Fig. 5 and Fig. 6 is applied as appropriate.

[0102] The rear pad 3 shown in Fig. 9 has a rear absorbent core 64 with a different shape from the embodiment shown in Fig. 5. In detail, as shown in Fig. 10, the rear absorbent core 64 has at least two low weight portions, a first low weight portion 65A and a second low weight portion 65B, located in the central region of the rear pad 3 in the lateral direction Y, and a high weight portion 66 having a higher basis weight than the low weight portions 65A and 65B.

[0103] 10, the high basis weight portion 66 is composed of a rear first portion 64a, a rear second portion 64b, and a rear third portion 64c. The rear first portion 64a, the rear second portion 64b, and the rear third portion 64c are all rectangular. The rear first portion 64a, the rear second portion 64b, and the rear third portion 64c are connected in this order in the lateral direction Y, and the rear second portion 64b is located between the rear first portion 64a and the rear third portion 64c.

[0104] As shown in FIG. 10, the rectangular first rear portion 64a, second rear portion 64b, and third rear portion 64c each have a horizontal side extending in the horizontal direction Y and a vertical side extending in the vertical direction X.

[0105] The horizontal sides of the rear first portion 64a and the rear third portion 64c have the same length and are shorter than the horizontal side of the rear second portion 64b. The vertical sides of the rear first portion 64a and the rear third portion 64c have the same length and are longer than the vertical side of the rear second portion 64b. The rear first portion 64a and the rear third portion 64c extend beyond the waist-side horizontal edge 66a of the rear second portion 64b to the waist side. The waist-side horizontal edges 66e of the rear first portion 64a and the rear third portion 64c form a part of the first end of the rear absorbent core 64 located on the waist side.

[0106] 10, the rear first portion 64a and the rear third portion 64c extend beyond the crotch side horizontal edge 66b of the rear second portion 64b to the crotch side. The crotch side horizontal edge 66c of the rear first portion 64a and the rear third portion 64c form a part of the second end located on the crotch side of the rear absorbent core 64. As a result, the high basis weight portion 66 has a generally H-shape.

[0107] The horizontal side 66e on the waist side of the first rear portion 64a and the third rear portion 64c may extend to the edge on the waist side of the rear pad 3. In that case, the horizontal side 65e is shared with the first end X3 (see FIG. 9) of the rear pad 3. FIGS. 9 and 10 show a state in which the first end, which is the horizontal side 66e, extends to the vicinity of the first end X3 of the rear pad 3. The distance between the horizontal side 66e and the first end X3 can be set to, for example, not less than 0 mm and not more than 80 mm.

[0108] The horizontal side 66c on the crotch side of the first rear portion 64a and the third rear portion 64c extends to or near the second end X4 (see FIG. 9) of the rear pad 3. In FIG. 9 and FIG. 10, the second end, which is the horizontal side 66c, is shown extending to the vicinity of the second end X4 of the rear pad 3. The distance between the horizontal side 66c and the second end X4 can be set to, for example, not less than 0 mm and not more than 60 mm.

[0109] 10, the rear first portion 64a and the rear third portion 64c which form part of the high basis weight portion 66 extend to the waist side beyond the horizontal side 66a located on the waist side of the rear second portion 64b. The rectangular region located between the rear first portion 64a and the rear third portion 64c and located on the waist side of the horizontal side 66a of the rear second portion 64b constitutes the first low basis weight portion 65A. The first low basis weight portion 65A has a horizontal side extending in the horizontal direction Y and a vertical side extending in the vertical direction X. The horizontal side 65d on the waist side of the first low basis weight portion 65A forms a first end located on the waist side of the first low basis weight portion 65A. The length of the horizontal side 65d is the same as the length of the horizontal side 66a on the waist side of the rear second portion 64b. The horizontal side 66e on the waist side of the rear first portion, the horizontal side 65d of the first low basis weight portion 65A, and the horizontal side 66e on the waist side of the rear third portion are in the same position when the rear absorbent core 64 is viewed along the longitudinal direction X. That is, these horizontal sides 66e, 65d, 66e are located on the same straight line in the lateral direction Y in this order, and form a first end located on the waist side of the rear absorbent core 64. The horizontal side 65d extends to the first end X3 (see FIG. 9) of the rear pad 3 or to the vicinity thereof. 9 and 10 show a state in which the first end, which is the horizontal side 65d, extends to the vicinity of the first end X3 of the rear pad 3. The distance between the horizontal side 65d and the first end X3 can be set to, for example, not less than 0 mm and not more than 80 mm. The horizontal side 65e on the crotch side of the first low weight portion 65A forms a second end located on the crotch side of the first low weight portion 65A. The horizontal side 65e of the first low weight portion 65A and the horizontal side 66a on the waist side of the second back region 64b are shared by each other. The vertical side 65f on the left side (left side of the paper in FIG. 10) of the first low weight portion 65A forms part of the vertical side of the rear first region 64a. The vertical side 65f on the right side (right side of the paper in FIG. 10) of the first low weight portion 65A forms part of the vertical side of the rear third region 64c.

[0110] The first rear portion 64a and the third rear portion 64c extend beyond the horizontal side 66b located on the crotch side of the second rear portion 64b to the crotch side. A rectangular region located between the first rear portion 64a and the third rear portion 64c and on the crotch side of the horizontal side 66b of the second rear portion 64b constitutes the second low basis weight portion 65B. The second low weight portion 65B has a horizontal side extending in the horizontal direction Y and a vertical side extending in the vertical direction X. The horizontal side 65b on the crotch side of the second low basis weight portion 65B forms a second end located on the crotch side of the second low basis weight portion 65B. The length of the horizontal side 65b is the same as the length of the horizontal side 66b on the crotch side of the rear second portion 64b. The horizontal side 66c on the crotch side of the rear first portion, the horizontal side 65b of the second low basis weight portion 65B, and the horizontal side 66c on the crotch side of the rear third portion are in the same position when the rear absorbent core 64 is viewed along the longitudinal direction X. That is, these horizontal sides 66c, 65b, 66c are located on the same straight line in the lateral direction Y in this order, and form a second end located on the crotch side of the rear absorbent core 64. The horizontal side 65b extends to the second end X4 (see FIG. 9) of the rear pad 3 or to the vicinity thereof. 9 and 10 show a state in which the second end, which is the horizontal side 65b, extends to the vicinity of the second end X4 of the rear pad 3. The distance between the horizontal side 65b and the second end X4 can be set to, for example, not less than 0 mm and not more than 60 mm. The waist-side horizontal side 65a of the second low weight portion 65B forms a first end located on the waist side of the second low weight portion 65B. The waist-side horizontal side 65a of the second low weight portion 65B and the crotch-side horizontal side 66b of the second back portion 64b are shared by each other. The vertical side 65c on the left side (left side of the paper in Figure 10) of the second low weight portion 65B forms part of the vertical side of the rear first portion 64a, and the vertical side 65c on the right side (right side of the paper in Figure 10) of the second low weight portion 65B forms part of the vertical side of the rear third portion 64c.

[0111] Therefore, the first low weight portion 65A and the second low weight portion 65B are arranged in the longitudinal direction X with the second rear portion 64b, which constitutes part of the high weight portion 66, in between. The first low weight portion 65A is located on the waist side, and the second low weight portion 65B is located on the crotch side.

[0112] In the rear absorbent core 64 of the rear pad 3 of this embodiment, the length L3 in the longitudinal direction X of the first low basis weight portion 65A is shorter than the length L2 in the longitudinal direction X of the second low basis weight portion 65B. As a result, the area of ​​the first low basis weight portion 65A is smaller than the area of ​​the second low basis weight portion 65B. Therefore, the rear second portion 64b is positioned slightly biased toward the waist side from the center of the rear absorbent core 64 in the longitudinal direction X.

[0113] By adopting such a shape for the rear absorbent core 64, the rear absorbent core 64 achieves the above-mentioned average basis weight ratio. Specifically, as shown in Fig. 10, when a line that bisects the rear absorbent core 64 in the longitudinal direction X is taken as a third imaginary line A3, the average basis weight of the third absorbent core D3 located on the wearer's waist side is greater than the average basis weight of the fourth absorbent core D4 located on the wearer's crotch side.

[0114] 10, when the length of the vertical side of the first rear region 64a and the third rear region 64c is L1, the length of the first rear region 64a and the third rear region 64c extending from the horizontal side 66b of the second rear region 64b toward the crotch side is L2, and the length of the first rear region 64a and the third rear region 64c extending from the horizontal side 66a of the second rear region 64b toward the waist side is L3, the value of L1 / L2 is preferably set to 1.0 to 4.0, more preferably 1.2 to 2.5, and even more preferably 1.3 to 1.7. The value of L1 / L3 is preferably set to 3 to 30, more preferably 5 to 25, and even more preferably 10 to 20.

[0115] From a similar viewpoint, when the length of the horizontal side 66b of the rear second portion 64b is W1 and the length of the horizontal side 66c of the rear first portion 64a and the rear third portion 64c is W2, it is preferable to set the value of W1 / W2 to be 2.0 or more and 8.0 or less, more preferably 2.8 or more and 7.0 or less, and even more preferably 3.5 or more and 6.0 or less.

[0116] As shown in FIG. 6(b), by adopting the above-mentioned shape for the rear absorbent core 64, the rear pad 3 has an uneven structure on the skin-facing surface. In detail, in this embodiment, the high basis weight portion 66 is made of a single-layer absorbent body, whereas the second low basis weight portion 65B (see FIG. 10), which is the low basis weight portion 65, does not contain any of the constituent materials of the rear absorbent core 64. As a result, when the rear pad 3 is viewed as a whole, the thickness of the rear pad 3 in the region where the high basis weight portion 66 is arranged is greater than the thickness of the rear pad 3 in the region where the second low basis weight portion 65B is arranged. Since the second low basis weight portion 65B is located between the rear first portion 64a (see FIG. 10) and the rear third portion 64c (see FIG. 10), a step is generated between the second low basis weight portion 65B and the rear first portion 64a, and between the second low basis weight portion 65B and the rear third portion 64c. With the rear pad 3 configured in this way, the area of ​​the rear pad 3 where the second low basis weight portion 65B is located and the thickness of the rear pad 3 is reduced can more easily function as a pocket for storing body waste. This makes it easier to prevent body waste from leaking out of the rear pad 3 than ever before.

[0117] The difference in thickness in the rear pad 3 can be achieved by disposing the constituent material of the rear absorbent core 64 in the high basis weight portion 66 and not disposing it in the second low basis weight portion 65B, and by making the thickness of the rear topsheet 68 smaller than the thickness of the high basis weight portion 66 of the rear absorbent core 64. Alternatively, when the constituent material of the rear absorbent core 64 is disposed in the second low basis weight portion 65B, the amount of the constituent material disposed in the second low basis weight portion 65B is made smaller than the amount of the constituent material disposed in the high basis weight portion 66, and by making the thickness of the rear topsheet 68 smaller than the thickness of the high basis weight portion 66 of the rear absorbent core 64. Alternatively, the difference in thickness can be achieved by embossing the constituent material of the second low basis weight portion 65B to provide a compressed portion where the second low basis weight portion 65B is pressurized.

[0118] Moreover, the diaper 1 of this embodiment is configured so that the front pad 2 and the rear pad 3 can be connected together such that, when the diaper 1 is worn, the second end X2 (see FIG. 3) of the front pad 2 does not extend beyond the low basis weight portion 65 of the rear absorbent core 64 shown in FIG. 7(b) and the edge 65a of the second low basis weight portion 65B shown in FIG. 10, i.e., the horizontal side 66b of the rear second region 64b of the high basis weight portion 66, i.e., does not extend beyond the horizontal side 66b and is positioned toward the waist of the wearer. This allows the thickness of the diaper 1 to be thinner than when the second end X2 of the front pad 2 extends beyond the horizontal side 66b of the high basis weight portion 66 and is positioned toward the waist. As a result, the wearer is less likely to feel irritation to the skin caused by overlapping components of the diaper 1, and the wearing comfort of the diaper 1 can be easily improved.

[0119] Although the embodiment (i) has been described above, the shapes of the absorbent cores in the front pad 2 and the rear pad 3 are not limited to those in the above-described embodiment. In the front pad 2, for example, in one embodiment, the upper absorbent core 25 shown in FIG. 7(a) may not be provided with the upper opening 25c, and the upper absorbent core 25 may be biased toward the crotch side. In the rear pad 3, in the embodiment shown in Fig. 5, the contour of the rear absorbent core 64 has a generally inverted U-shape consisting of straight lines, but instead, as shown in Fig. 11(a), the boundary between the low basis weight portion 65 and the high basis weight portion 66 may have a horseshoe shape consisting of straight lines and curved lines. Alternatively, in the embodiment shown in Fig. 10, the contour of the rear absorbent core 64 has a shape consisting of straight lines, but instead, as shown in Fig. 11(b), the boundary between the first low basis weight portion 65A, the high basis weight portion 66, and the second low basis weight portion 65B may have a shape consisting of straight lines and curved lines. Alternatively, in the embodiment shown in FIG. 7(b), the low basis weight portion 65 is not surrounded by the high basis weight portion 66, but instead, as shown in FIG. 11(c), the rectangular low basis weight portion 65 may be surrounded by the high basis weight portion 66. That is, the crotch side edge 65a of the low basis weight portion 65 may be located inward in the longitudinal direction X from the crotch side edge of the rear pad 3, and the crotch side edge of the high basis weight portion 66 may extend to the waist side edge of the rear pad 3 or its vicinity. Alternatively, as shown in FIG. 11(d), the oval low basis weight portion 65 may be surrounded by the high basis weight portion 66. That is, the crotch side edge 65a of the low basis weight portion 65 may be located inward in the longitudinal direction X from the crotch side edge of the rear pad 3, and the crotch side edge of the high basis weight portion 66 may extend to the waist side edge of the rear pad 3 or its vicinity.

[0120] The following describes embodiment (ii), but the present invention is not limited to the following configuration. As for the constituent material of the front absorbent core 24 in the front pad 2, it is preferable that the mass of the first absorbent core D1 shown in Fig. 7(a) is smaller than the mass of the second absorbent core D2. By adjusting the degree of uneven distribution of the constituent material of the front absorbent core 24 in this way, it becomes possible to effectively absorb excrement in the part with a large average basis weight, and it becomes easier to prevent the excrement from leaking out of the front pad 2 than in the past. As a result, it becomes sufficient to replace only the front pad 2 when urinating, and as a result, the amount of waste disposal can be reduced, and the environmental load can be reduced. On the other hand, as the material of the rear absorbent core 64 in the rear pad 3, it is preferable to make the mass of the third absorbent core D3 shown in Fig. 7(b) larger than the mass of the fourth absorbent core D4. By adjusting the degree of uneven distribution of the material of the rear absorbent core 64 in this way, the portion with a small average basis weight is more likely to play the role of a pocket for storing excrement, and leakage of excrement from the rear pad 3 can be more easily suppressed than before. As a result, it is sufficient to mainly replace the rear pad 3 when defecating, and as a result, the amount of waste disposal can be reduced, and the environmental load can be reduced.

[0121] In the diaper 1 of the present invention, when the absorbents in the front pad 2 and the rear pad 3 each contain a water-absorbent polymer, it is preferable that the basis weight of the water-absorbent polymer in the front pad 2 is greater than that of the rear pad 3. In this way, by disposing a large amount of water-absorbent polymer in the front pad 2, which mainly absorbs urine, it is possible to prevent urine from leaking from the diaper 1. Furthermore, by disposing a small amount of water-absorbent polymer in the rear pad 3, which mainly absorbs feces, it is possible to reduce the gritty feeling on the buttocks of the wearer when the front pad 2 and the rear pad 3 are worn, and to obtain a comfortable fit. When the rear absorbent body 61 in the rear pad 3 does not contain a water-absorbent polymer, the front absorbent body 21 in the front pad 2 contains a water-absorbent polymer, thereby achieving the above-mentioned effect.

[0122] In the diaper 1 of the present invention, the front pad 2 and the rear pad 3 each preferably have a predetermined size. In the unfolded and maximum stretched state of the front pad 2 shown in Fig. 12(a), the length of the second end X2 of the front pad 2 along the horizontal direction Y is defined as length a2, and the length of the front pad 2 along the vertical direction X is defined as length b2. When the width of the front crotch horizontal stretchable member 30 is greater than the width of the front absorbent main body 20 and the crotch side edge of the front crotch horizontal stretchable member 30 is arranged so as to substantially coincide with the second end X2 of the front pad 2, the length of the crotch side edge of the front absorbent main body 20 along the horizontal direction Y is defined as length a2. In the unfolded and maximum stretched state of the rear pad 3 shown in Fig. 12(b), the length of the second end X4 of the rear pad 3 along the horizontal direction Y is defined as length a1, and the length of the rear pad 3 along the vertical direction X is defined as length b1. In this case, in the front pad 2 and the rear pad 3, it is preferable that (1) the ratio of length b2 to length a2 (b2 / a2) is smaller than the ratio of length b1 to length a1 (b1 / a1), (2) the length b1 is greater than the length b2, and (3) the product of length a1 and length b1 (a1b1) is greater than the product of length a2 and length b2 (a2b2). Furthermore, since the front pad 2 and the rear pad 3 satisfy all of (1) to (3), when the pads 2 and 3 are connected, the absorbent cores of the pads 2 and 3 can easily contact the wearer's excretory area. As a result, leakage of excrement can be further suppressed than before. Furthermore, when excreting, only the pad soiled by excrement needs to be replaced, which reduces the amount of waste and the environmental impact.

[0123] From the viewpoint of suppressing leakage of excrement more than ever before and reducing the environmental load, b2 / a2 is preferably 0.8 or more, more preferably 0.9 or more, and even more preferably 1.0 or more, provided that the above (1) is satisfied. In addition, b2 / a2 is preferably 1.8 or less, more preferably 1.6 or less, and even more preferably 1.5 or less, provided that the above (1) is satisfied. From the viewpoint of suppressing leakage of excrement more than ever before and reducing the environmental load, b1 / a1 is preferably 1.0 or more, more preferably 1.1 or more, and even more preferably 1.2 or more, provided that the above (1) is satisfied. In addition, b1 / a1 is preferably 2.2 or less, more preferably 2.0 or less, and even more preferably 1.8 or less, provided that the above (1) is satisfied.

[0124] From the viewpoint of suppressing leakage of excrement more than before and reducing the environmental load, a1b1 is preferably 150 cm 2 More than 300cm, preferably 300cm 2 More preferably, 450 cm 2 In addition, a1b1 is preferably 1500 cm 2 Less than or equal to 1250 cm 2 Less than 800 cm, more preferably 2 The following is the result. From the viewpoint of suppressing leakage of excrement more than before and reducing the environmental load, a2b2 is preferably 100 cm 2 More than 200cm, preferably2 More preferably, 300 cm 2 In addition, a2b2 is preferably 1000 cm 2 Less than or equal to 800 cm 2 Less than 650cm, more preferably 2 The following is the result.

[0125] The length a2 is preferably 10 cm or more, more preferably 12 cm or more, and even more preferably 14 cm or more. The length a2 is preferably 30 cm or less, more preferably 25 cm or less, and even more preferably 22 cm or less. The length a1 is preferably 12 cm or more, more preferably 14 cm or more, and even more preferably 16 cm or more. The length a1 is preferably 35 cm or less, more preferably 30 cm or less, and even more preferably 22 cm or less. The length b2 is preferably 10 cm or more, more preferably 12 cm or more, and even more preferably 14 cm or more, provided that the above condition (2) is satisfied. Also, the length b2 is preferably 40 cm or less, more preferably 35 cm or less, and even more preferably 30 cm or less, provided that the above condition (2) is satisfied. The length b1 is preferably 15 cm or more, more preferably 17 cm or more, and even more preferably 20 cm or more, provided that the above condition (2) is satisfied. Also, the length b1 is preferably 50 cm or less, more preferably 45 cm or less, and even more preferably 40 cm or less, provided that the above condition (2) is satisfied.

[0126] In addition, in the diaper 1 of the present invention, it is preferable that the length of the rear three-dimensional cuff 90 along the vertical direction X is longer than the length of the front three-dimensional cuff 50 along the vertical direction X. By configuring the front three-dimensional cuff 50 and the rear three-dimensional cuff 90 in this manner, the front pad 2 is less likely to contract than the rear pad 3, and in the worn state, the front pad 2 is more likely to be in close contact with the skin near the urethral opening, and the rear pad 3 is more likely to be separated from the anus. In this state, the front pad 2 can absorb urine more quickly, and the rear pad 3 can secure a space for accommodating feces, so that leakage of urine and feces from the diaper 1 can be further suppressed. The "length along the vertical direction of the front three-dimensional cuff" means the length along the vertical direction X of the region of the front three-dimensional cuff 50 where the first elastic member 52 is arranged and which exhibits elastic stretchability. The term "length of the rear cuff along the vertical direction" refers to the length of the area of ​​the rear cuff 90 in which the fifth elastic member 92 is disposed along the vertical direction X. The difference in length between the front cuff 50 and the rear cuff 90 in the vertical direction X can be achieved by making the length of the fifth elastic member 92 longer than the length of the first elastic member 52. Alternatively, the difference can be achieved by making the length of the front non-standing portion 50t in the vertical direction X shorter than the length of the rear non-standing portion 90t in the vertical direction X.

[0127] In the diaper 1 of the present invention, the length of the rear leg cuff 95 in the longitudinal direction X is preferably longer than the length of the front leg cuff 55 in the longitudinal direction X. Since the front leg cuff 55 and the rear leg cuff 95 are configured as described above, the length of the rear pad 3 in the longitudinal direction X can be adjusted to a larger range, and when the rear pad 3 is connected to the front pad 2 from above as shown in FIG. 2, the length can be easily adjusted to a length that matches the wearer's body. As a result, the fit of the diaper 1 can be improved, and leakage of urine and feces from the diaper 1 can be further suppressed. The "length of the front leg cuff in the longitudinal direction" refers to the length of the region of the front leg cuff 55 in which the second elastic member 56 is disposed that exhibits elastic stretchability in the longitudinal direction X. The "length of the rear leg cuff in the longitudinal direction" refers to the length of the region of the rear leg cuff 95 in which the sixth elastic member 96 is disposed in the longitudinal direction X. The difference in length in the longitudinal direction X between the front leg cuff 55 and the rear leg cuff 95 can be achieved by making the length of the sixth elastic member 96 longer than the length of the second elastic member 56. Alternatively, the difference in length in the longitudinal direction X between the front outer stretchable portion 55s and the rear outer stretchable portion 95s can be achieved by making the length in the longitudinal direction X of the front outer stretchable portion 55s shorter than the length in the longitudinal direction X of the rear outer stretchable portion 95s.

[0128] 13 to 17 show other embodiments of the diaper of the present invention. In the other embodiments described below, configurations different from the above-mentioned embodiment will be described. For configurations not specifically described in the other embodiments described below, the description of the above-mentioned embodiment will be applied as appropriate.

[0129] A diaper 111 shown in Fig. 13 is composed of a front pad 112 arranged on the wearer's abdominal side, a rear pad 113 arranged on the wearer's back side, and an annular holder 114 arranged around the wearer's waist. The front pad 112 has a structure similar to that of the above-mentioned front pad 2, and the rear pad 113 has a structure similar to that of the above-mentioned rear pad 3. The holder 114 is made of a sheet member. As the sheet member, for example, a nonwoven fabric, a resin film, a composite sheet of a nonwoven fabric and a resin film, or the like can be used. It is preferable that the holder 114 has elasticity in the circumferential direction. The diaper 111 is put on by first putting on the holder 114 and then connecting the holder 114, the front pad 112 and the rear pad 113 at the crotch region and waist of the wearer.

[0130] The diaper 121 shown in Fig. 14 is composed of a pad 122 and an annular holder 124 arranged around the waist of a wearer. The pad 122 includes a front pad (not shown) having a similar structure to the above-mentioned front pad 2, and a rear pad (not shown) having a similar structure to the above-mentioned rear pad 3, and these two pads are separably connected to each other at their end regions on the crotch side. The holder 124 is different from the holder 114 in that it is arranged on the back side of the wearer and has a downward extension part 123 that extends downward. The diaper 121 is put on by attaching the holder 124 to the wearer's body and then connecting the pad 122 (the connection between the front pad and the rear pad) and the holder 124 in the crotch region and waist region of the wearer.

[0131] The diaper 131 shown in FIG. 15 is composed of a pad 132 and a cover 134. The pad 132 is constructed similarly to the pad 122 described above, and includes a front pad (not shown) and a rear pad (not shown). The cover 134 has a holder 136 and a downward extension 133 that extends below the holder 136, passes through the crotch region of the wearer, and can be connected to the holder 136 in the abdominal region of the wearer. The holder 136 is composed of a strip-shaped sheet member that extends in a direction perpendicular to the extension direction of the downward extension 133, and the strip-shaped sheet member has a pair of extensions that extend laterally outward from the downward extension 133. A fastening portion 135 is disposed at the tip of one of the pair of extensions, and one and the other of the pair of extensions are connected via the fastening portion 135, so that the holder 136 can be made into an annular shape as shown in FIG. 15(a). One and the other of the pair of extending portions are separably connected via a fastening portion 135. It is preferable that the annular holder 136 is stretchable in the circumferential direction. The diaper 131 is put on by placing the annular holder 136 of the cover 134 around the wearer's waist and then connecting the downward extension 133 of the holder 136 and the pad 132 in the crotch region of the wearer.

[0132] A diaper 141 shown in Fig. 16 is composed of a pad 142 to be placed on the abdominal side of a wearer, and a cover 144. The pad 142 is configured similarly to the pad 122 described above, and includes a front pad (not shown) and a rear pad (not shown). The cover 144 has a holder 146 and a downward extension 143 extending below the holder 146. The cover 144 has the same basic configuration as the cover 134 shown in Fig. 15 described above, but differs therefrom in that the downward extension 143 of the cover 144 is shorter than the downward extension 133 of the cover 134. The diaper 141 is put on by placing the annular holder 146 of the cover 144 around the wearer's torso and then connecting the downward extension 143 of the holder 146 and the pad 142 in the crotch region and waist region of the wearer.

[0133] 17 is composed of a front pad 152 arranged on the wearer's abdominal side and a rear pad 153 arranged on the wearer's back side. Whereas the holder 110 of the diaper 1 is formed only from the holder-forming members 101, 102 of the rear pad 3, the holder 154 of the diaper 151 is formed from both pads 152, 153. The structure and function of the diaper 151 other than the holder 154 is the same as the structure and function of the diaper 1 other than the holder 110.

[0134] While the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above-described embodiments and can be modified as appropriate without departing from the spirit of the present invention. For example, although the above embodiment is an application of the present invention to a disposable diaper, the application of the present invention is not limited thereto, and the present invention may be applied to disposable diapers of other types than disposable diapers, and absorbent articles other than disposable diapers, such as sanitary napkins, incontinence pads, and panty liners, etc. Among these, it is preferable that the present invention is applied to a disposable diaper.

[0135] In relation to the above-mentioned embodiment of the present invention, the following absorbent article is further disclosed. <1> A vertical direction corresponds to the front-to-back direction of a wearer, and a horizontal direction perpendicular to the vertical direction, An absorbent article having a front pad to be placed on the abdomen side of a wearer and a rear pad to be placed on the back side of the wearer, the front pad and the rear pad being connected in a crotch region of the wearer and usable, The front pad and the rear pad each have an absorbent core; In the front pad, when the absorbent core of the front pad is virtually divided into two equal parts in the longitudinal direction, the average basis weight of the absorbent core located on the wearer's waist side is smaller than the average basis weight of the absorbent core located on the wearer's crotch side; or An absorbent article, wherein, in the rear pad, when the absorbent core of the rear pad is virtually divided in half in the vertical direction, the average basis weight of the absorbent core located on the wearer's waist side is greater than the average basis weight of the absorbent core located on the wearer's crotch side.

[0136] <2> the absorbent core of the front pad and the absorbent core of the rear pad each include absorbent fibers or polymers; The basis weight of the water-absorbing polymer of the front pad is greater than the basis weight of the water-absorbing polymer of the rear pad. <1> The absorbent article according to claim 1. <3> The absorbent core of the front pad is a sheet material in which particles of the water-absorbing polymer are held between two sheets containing the water-absorbing fibers. <2> The absorbent article according to claim 1. <4> The absorbent core of the rear pad includes the water-absorbing fibers and does not include the water-absorbing polymer. <2> or <3> The absorbent article according to claim 1. <5> The front pad and the rear pad each have a first end which is one end of the pad in the longitudinal direction and is located on the wearer's waist side, and a second end which is the other end of the pad in the longitudinal direction and is located on the wearer's crotch side, In the unfolded and maximum extended state of the front pad, a length of the second end of the front pad along the lateral direction is a2, and a length of the front pad along the vertical direction is b2; When the rear pad is in the fully extended and unfolded state, a length of the second end of the rear pad along the lateral direction is a1, and a length of the rear pad along the vertical direction is b1. The ratio of length b2 to length a2 is smaller than the ratio of length b1 to length a1, Length b1 is greater than length b2, and The product of length a1 and length b1 is greater than the product of length a2 and length b2. <1> Or <4> 13. An absorbent article according to any one of claims 1 to 12. <6> The absorbent core of the front pad includes an upper absorbent core located in the central region in the lateral direction and extending in the longitudinal direction, and a lower absorbent core located on the non-skin-facing surface side of the upper absorbent core, whereby the absorbent core has a high basis weight portion located in the central region in the lateral direction and extending in the longitudinal direction, and a low basis weight portion having a basis weight relatively lower than that of the high basis weight portion, The front pad and the rear pad are configured to be connectable to each other so that the high basis weight portion of the absorbent core in the front pad covers the urethral opening of the wearer when the absorbent article is worn. <1> Or <5> 13. An absorbent article according to any one of claims 1 to 12.

[0137] <7> the upper absorbent core is located on the skin-facing surface of the lower absorbent core at a position slightly offset toward the second end side from the center of the lower absorbent core in the longitudinal direction; <6> The absorbent article according to claim 1. <8> In the central region in the lateral direction of the upper absorbent core, an upper layer opening having a narrow width is formed so as to extend in the vertical direction and penetrate the upper absorbent core in the thickness direction. <6> or <7> The absorbent article according to claim 1. <9> The absorbent core of the rear pad has a low basis weight portion located in a central region in the lateral direction and extending in the longitudinal direction, and a high basis weight portion having a basis weight higher than that of the low basis weight portion, the low basis weight portion of the rear pad has, among both ends in the longitudinal direction, a first end located on a waist side of a wearer when the absorbent article is worn, and a second end located on a crotch side of the wearer, The second end extends to an edge of the rear pad on the crotch side or to a vicinity thereof, The first end is connected to the high basis weight portion, The two pads are configured to be connectable to each other so that the low basis weight portion of the rear pad covers the anus of the wearer when the absorbent article is worn. <1> Or <8> 13. An absorbent article according to any one of claims 1 to 12. <10> The low basis weight portion is free of any constituent material of the absorbent core of the rear pad. <9> The absorbent article according to claim 1. <11> the high basis weight portion is composed of a first portion, a second portion, and a third portion, which are connected in this order in the lateral direction; the second site is located between the first site and the third site; the first region and the third region extend further toward the crotch side than the second region, so that the high weight portion has a generally inverted U-shape; When the rear pad is viewed as a whole, the thickness of the rear pad in the region where the high basis weight portion is arranged is larger than the thickness of the rear pad in the region where the low basis weight portion is arranged, so that a step is generated between the first and third portions and the low basis weight portion located therebetween in the rear pad. <9> or <10> The absorbent article according to claim 1.

[0138] <12> The front pad and the rear pad are configured to be connectable to each other such that, when the absorbent article is worn, a second end of the front pad does not extend beyond a first end of the low basis weight portion of the rear pad and does not overlap with the high basis weight portion. <9> Or <11> 13. An absorbent article according to any one of claims 1 to 12. <13> The absorbent core of the rear pad has at least two low basis weight sections located in a central region in the lateral direction and extending in the longitudinal direction, and a high basis weight section having a basis weight higher than that of the low basis weight sections, The low basis weight portion of the rear pad is disposed along the longitudinal direction with the high basis weight portion therebetween, The low weight portion of the rear pad includes a first low weight portion located on the wearer's waist side and a second low weight portion located on the wearer's crotch side, the first low basis weight portion and the second low basis weight portion each have, among both ends in the longitudinal direction, a first end located on a waist side of a wearer when the absorbent article is worn, and a second end located on a crotch side of the wearer, a second end of the first low basis weight portion is connected to the high basis weight portion, a first end of the first low weight portion extends to an edge of the rear pad on a waist side or to a vicinity thereof; a second end of the second low weight portion extends to an edge of the rear pad on a crotch side; a first end of the second low basis weight portion is connected to the high basis weight portion, the front pad and the rear pad are configured to be connectable to each other such that, when the absorbent article is worn, the second end of the front pad is not positioned on the waist side of the wearer beyond a first end of the second low basis weight portion of the rear pad; <1> Or <12> 13. An absorbent article according to any one of claims 1 to 12. <14> the high basis weight portion is composed of a first portion, a second portion, and a third portion, which are connected in this order in the lateral direction; the second site is located between the first site and the third site; the first region and the third region extend further toward the waist side than the second region and also extend toward the crotch side, so that the high weight portion has a substantially H-shape; When the rear pad is viewed as a whole, the thickness of the rear pad in the region where the high basis weight portion is arranged is greater than the thickness of the rear pad in the region where the second low basis weight portion is arranged, so that a step is generated in the rear pad between the first portion, the third portion, and the second low basis weight portion located therebetween. <13> The absorbent article according to claim 1. <15> The front pad and the rear pad each have a three-dimensional cuff, The three-dimensional cuff of the front pad has a tendency to collapse inward in the lateral direction, The three-dimensional cuff of the rear pad has a tendency to collapse outward in the lateral direction. <1> Or <14> 13. An absorbent article according to any one of claims 1 to 12. <16> The front pad includes a front absorbent body and a front waist portion disposed on the skin-facing surface side of the front absorbent body, The front pad includes the front waist portion in a waist region located on the waist side of a wearer when the absorbent article is worn. <1> Or <15> 13. An absorbent article according to any one of claims 1 to 12.

[0139] <17> The front waist portion includes two front waist portion forming sheets and a fourth elastic member fixed between the front waist portion forming sheets in a stretched state in the lateral direction. <16> The absorbent article according to claim 1. <18> The front waist portion has a front fixed portion fixed to another component and a front non-fixed portion not fixed to another component, When the front pad is in a worn or natural state, the front non-fixed portion of the front waistband forming sheet rises toward the wearer's skin side due to contraction of the fourth elastic member, thereby forming a front pocket portion in the front pad, the front pocket portion having a front internal space defined by the rising front non-fixed portion and the front absorbent main body facing the front non-fixed portion, and a front opening portion opening toward the crotch side. <17> The absorbent article according to claim 1. <19> The front waist portion has a front fastening portion on the front waist portion forming sheet on the skin-facing side. <17> or <18> The absorbent article according to claim 1. <20> The rear pad includes a rear absorbent body and a waist belt disposed on the skin-facing surface side of the rear absorbent body, The rear pad includes the waist belt in a waist region located on the waist side of the wearer when the absorbent article is worn. <1> Or <19> 13. An absorbent article according to any one of claims 1 to 12. <21> The rear pad is provided with a rear crotch lateral stretch member on a skin-facing surface side of a crotch region located on the crotch side of a wearer when the absorbent article is worn. <1> Or <20> 13. An absorbent article according to any one of claims 1 to 12.

[0140] <22> The rear crotch horizontal stretchable member is disposed so that an end edge of the rear crotch horizontal stretchable member on the crotch side is substantially aligned with a second end of the rear pad. <21> The absorbent article according to claim 1. <23> The rear crotch horizontal stretchable member includes two rear crotch horizontal stretchable member forming sheets and a seventh elastic member fixed between the rear crotch horizontal stretchable member forming sheets in a stretched state in the horizontal direction. <21> or <22> The absorbent article according to claim 1. <24> The rear crotch lateral stretchable member has a rear second fixed portion fixed to another component and a rear second non-fixed portion not fixed to another component, When the rear pad is in a worn or natural state, the seventh elastic member contracts, causing the rear second non-fixed portion of the rear crotch lateral stretch member forming sheet to rise toward the wearer's skin, thereby forming a rear second pocket portion in the rear pad, the rear second pocket portion having a rear second internal space defined by the rising rear second non-fixed portion and the rear absorbent body facing the rear second non-fixed portion, and a rear second opening portion opening toward the waist side. <23> The absorbent article according to claim 1. <25> The waist belt comprises a central sheet portion located at the lateral center of the waist belt and extending in the lateral direction, a pair of stretch panels arranged on both lateral sides of the central sheet portion, a connecting and fastening sheet portion provided on the lateral outer side of one of the stretch panels, and a connecting and fastened sheet portion provided on the lateral outer side of the other of the stretch panels, The connecting and fastening sheet portion has a fastening portion having a male member of a mechanical hook-and-loop fastener at the outer end in the lateral direction of the skin-facing surface. <20> Or <24> 13. An absorbent article according to any one of claims 1 to 12. <26> The central sheet portion includes two sheets elongated in the horizontal direction and an eighth elastic member fixed between the sheets in a stretched state in the horizontal direction. <25> The absorbent article according to claim 1. <27> The central sheet portion of the waist belt has a rear first fixed portion that is fixed to another component and a rear first non-fixed portion that is not fixed to another component, When the rear pad is in a worn or natural state, the contraction of the eighth elastic member causes the rear first non-fixed portion of the central sheet portion to rise toward the wearer's skin, thereby forming a rear first pocket portion in the rear pad, the rear first pocket portion having a rear first internal space defined by the rising rear first non-fixed portion and the rear absorbent main body facing the rear first non-fixed portion, and a rear first opening portion that opens toward the crotch side. <26> The absorbent article according to claim 1. [Explanation of symbols]

[0141] 1. Disposable diapers (diapers) 2 Front pad 3 Rear pad 20 Front absorbent body 21 Front absorbent body 24 Front absorbent core 25 Upper absorbent core 26 Lower absorbent core 30 Front crotch horizontal elastic member 40 Front waist 60 Rear absorbent body 61 Rear absorber 65 Low basis weight part 66 High basis weight part 70 Rear crotch horizontal stretch member 80 Waist Belt C Inseam area LO Leg Opening WO Waist opening X vertical direction Y Horizontal

Claims

1. It has a vertical direction corresponding to the wearer's front-to-back direction and a horizontal direction perpendicular to the vertical direction, An absorbent article having a front pad positioned on the wearer's abdominal side and a rear pad positioned on the wearer's back, and which can be used with both pads connected in the wearer's crotch area, The front pad and the rear pad each have an absorbent core, In the aforementioned front pad, when the absorbent core of the front pad is virtually divided into two equal parts in the longitudinal direction, the average basis weight of the absorbent core located on the wearer's waist side is smaller than the average basis weight of the absorbent core located on the wearer's crotch side, or An absorbent article in which, in the rear pad, when the absorbent core of the rear pad is virtually divided into two equal parts in the longitudinal direction, the average basis weight of the absorbent core located on the wearer's waist side is greater than the average basis weight of the absorbent core located on the wearer's crotch side.

2. The absorbent core of the front pad and the absorbent core of the rear pad each contain water-absorbing fibers or water-absorbing polymers. The absorbent article according to claim 1, wherein the basis weight of the water-absorbing polymer in the front pad is greater than the basis weight of the water-absorbing polymer in the rear pad.

3. The absorbent article according to claim 2, wherein the absorbent core of the rear pad contains the water-absorbing fibers and does not contain the water-absorbing polymer.

4. The front pad and the rear pad each have a first end, which is one end in the longitudinal direction of the pad and is located on the wearer's waist side, and a second end, which is the other end in the longitudinal direction of the pad and is located on the wearer's crotch side. In the unfolded and fully extended state of the front pad, the length of the second end of the front pad along the lateral direction is a2, and the length of the front pad along the longitudinal direction is b2. When the rear pad is deployed and in its maximum extended state, and the length of the second end of the rear pad along the transverse direction is a1, and the length of the rear pad along the longitudinal direction is b1, The ratio of length b2 to length a2 is smaller than the ratio of length b1 to length a1. Length b1 is greater than length b2, and The absorbent article according to claim 1, wherein the product of length a1 and length b1 is greater than the product of length a2 and length b2.

5. The absorbent core of the front pad includes an upper absorbent core located in the central region in the lateral direction and extending in the vertical direction, and a lower absorbent core located on the non-skin-facing side of the upper absorbent core, thereby the absorbent core having a high basis weight portion located in the central region in the lateral direction and extending in the vertical direction, and a low basis weight portion having a basis weight relatively lower than that of the high basis weight portion. The absorbent article according to claim 1, wherein, when the absorbent article is worn, the front pad and the rear pad are configured to be connectable such that the high basis weight portion of the absorbent core in the front pad covers the wearer's urethral opening.

6. The absorbent core of the rear pad has a low basis weight portion located in the central area in the lateral direction and extending in the vertical direction, and a high basis weight portion having a higher basis weight than the low basis weight portion. The low basis weight portion of the rear pad has, at both ends in the vertical direction, a first end located on the waist side of the wearer when the absorbent article is worn, and a second end located on the crotch side of the wearer. The second end extends to the crotch edge of the rear pad or its vicinity. The first end is connected to the high basis weight section, The absorbent article according to claim 1, wherein, when the absorbent article is worn, the two pads are connected such that the low basis weight portion of the rear pad covers the wearer's anus.

7. The aforementioned high-basis-weight section is composed of a first section, a second section, and a third section, which are connected in this order in the lateral direction. The second part is located between the first and third parts. The first and third sections extend further towards the crotch than the second section, and as a result, the high-basis-weight section has a roughly inverted U-shape. The absorbent article according to claim 6, wherein, when viewed as a whole rear pad, the thickness of the rear pad in the region where the high basis weight portion is located is greater than the thickness of the rear pad in the region where the low basis weight portion is located, and as a result, a step difference is created between the first portion and the third portion and the low basis weight portion located between them in the rear pad.

8. The absorbent article according to claim 6 or 7, wherein, when the absorbent article is worn, the front pad and the rear pad are configured to be connectable such that the second end of the front pad does not extend beyond the first end of the low-basis-weight portion of the rear pad and overlap with the high-basis-weight portion.

9. The absorbent core of the rear pad has at least two low-basis-weight portions located in the central area in the lateral direction and extending in the vertical direction, and a high-basis-weight portion with a higher basis weight than the low-basis-weight portions. The low basis weight portion of the rear pad is arranged along the vertical direction, sandwiching the high basis weight portion. The low-weight portion of the rear pad includes a first low-weight portion located on the wearer's waist side and a second low-weight portion located on the wearer's crotch side. The first low-basis-weight portion and the second low-basis-weight portion each have, at their respective ends in the vertical direction, a first end located on the waist side of the wearer when the absorbent article is worn, and a second end located on the crotch side of the wearer. The second end of the first low basis weight section is connected to the high basis weight section. The first end of the first low-basis-weight section extends to the waist-side edge of the rear pad or its vicinity. The second end of the second low-basic-weight section extends to the crotch edge of the rear pad. The first end of the second low basis weight section is connected to the high basis weight section. The absorbent article according to claim 1, wherein, when the absorbent article is worn, the front pad and the rear pad are configured to be connectable such that the second end of the front pad does not extend beyond the first end of the second low-basis-weight portion of the rear pad and remain on the wearer's waist side.

10. The aforementioned high-basis-weight section is composed of a first section, a second section, and a third section, which are connected in this order in the lateral direction. The second part is located between the first and third parts. The first and third sections extend further towards the waist than the second section, and also extend towards the crotch, so that the high-basis-weight section has a roughly H-shape. The absorbent article according to claim 9, wherein, when viewed as a whole rear pad, the thickness of the rear pad in the region where the high basis weight portion is located is greater than the thickness of the rear pad in the region where the second low basis weight portion is located, and as a result, a step difference is created in the rear pad between the first portion, the third portion and the second low basis weight portion located between them.

11. The front pad and the rear pad each have a three-dimensional cuff. The three-dimensional cuff of the front pad has a tendency to fold inward in the lateral direction. The absorbent article according to claim 1, wherein the three-dimensional cuff of the rear pad has a tendency to collapse outward in the lateral direction.

Images