Diaper

Abstract

To improve wearing comfortableness, while suppressing cost increase of a diaper.SOLUTION: A diaper 2 includes an absorber 21 whose one marginal part 3 in a longer direction is arranged up to a back body 2B, an inside sheet 22 for covering the absorber 21 from the skin side, and outside sheets 24 and 25 covering the absorber 21 from the non-skin side, and fixed to the one marginal part 3 side in the longer direction on the inside sheet 22. The outside sheets 24 and 25 extend along the one marginal part 3 in the longer direction of the absorber 21, and has outer creases 7 forming a valley fold as a view from the non-skin side.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] This invention relates to a diaper having an absorber.

Background Art

[0002] Conventionally, disposable diapers having a pocket for accommodating and holding excrement are known. For example, Patent Document 1 discloses a disposable diaper having a pocket that can be opened downward in a worn state. According to this disposable diaper, it is said that leakage to the outside can be prevented by allowing excrement to flow into the pocket, and discomfort and skin problems caused by contact of excrement with the skin can be avoided.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, diapers having such a pocket as described above require a special configuration to create the pocket, so the configuration is likely to become complicated, which may lead to an increase in manufacturing costs and product prices. Therefore, there is room for improvement in conventional pocketed diapers in suppressing an increase in cost while suppressing contact of excrement with the skin and improving the wearing comfort.

[0005] This invention was devised in view of the above problems, and one of its purposes is to improve the wearing comfort while suppressing an increase in the cost of the diaper.

Means for Solving the Problems

[0006] The diaper of the present invention includes an absorber having one longitudinal edge portion disposed up to the backside, an inner sheet covering the absorber from the skin side, and an outer sheet covering the absorber from the non-skin side and fixed to the one longitudinal edge portion side of the inner sheet. The outer sheet has an outer fold line that extends along the one edge portion and forms a valley-folded state when viewed from the non-skin side.

Effect of the Invention

[0007] According to the present invention, it is possible to improve the wearing comfort while suppressing an increase in the cost of the diaper.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

[0009] A mode for carrying out the diaper of this case will be described. This embodiment is merely an example, and there is no intention of excluding various modifications and applications of technologies not specified in the following embodiments. Each configuration of this embodiment can be variously modified and implemented without departing from their gist. Also, it can be selectively adopted or appropriately combined as necessary.

[0010] [1. Configuration] [1-1. Overall Configuration] As shown in FIGS. 1 and 2, the diaper 2 of this embodiment is a tape type in which a front body 2A facing the abdomen of the wearer and a back body 2B facing the back of the wearer are connected to each other by a fastening tape 1 (hereinafter simply referred to as "tape 1") in a worn state on the wearer. Here, a paper diaper (so-called disposable diaper) is exemplified as the diaper 2. In addition to the above-mentioned front body 2A and back body 2B, the diaper 2 is provided with a crotch portion 2C facing the crotch of the wearer in the worn state. The crotch portion 2C is located between the front body 2A and the back body 2B in the unfolded state where the diaper 2 is spread out flat.

[0011] Hereinafter, the direction connecting the front body 2A and the back body 2B in the unfolded state is referred to as the "longitudinal direction". Also, in the worn state, the side facing the skin of the wearer is referred to as the "skin side", and the opposite side is referred to as the "non-skin side". Further, the direction connecting the skin side and the non-skin side is referred to as the "thickness direction", and the direction orthogonal to both the longitudinal direction and the thickness direction is referred to as the "width direction". The diaper 2 of this embodiment is symmetrically formed with respect to the center line O in the width direction. The diaper 2 includes a tape 1, an absorber 21, various sheets 22 to 26, and various gathers 27 to 29. Hereinafter, these configurations will be described in order.

[0012] <Tape> The tape 1 is non-removably provided on both sides in the width direction of one of the front body 2A and the back body 2B, and removably provided on the other of the front body 2A and the back body 2B. In this embodiment, an example of the tape 1 provided on both sides in the width direction of the back body 2 and fastened to the front body 2A when the diaper 2 is worn will be illustrated. Note that the number of the tapes 1 is not particularly limited, but here, an example in which one tape 1 is provided on each of both sides in the width direction of the back body 2B (a total of one pair) is shown.

[0013] As shown in FIG. 9, the tape 1 has a base material 11 and an adhesive material 12 stacked in the thickness direction. The base material 11 has a fixed portion 11a fixed to a cover sheet 25 described later in the back body 2B, and an extending portion 11b extending outward in the width direction from the cover sheet 25. In the diaper 2, the fixed portion 11a is sandwiched between a side sheet 23 and the cover sheet 25 described later, and the extending portion 11b is provided without being overlapped with any of the sheets 22 to 26. In the drawing, the adhesive material 12 is shown with dot patterns. In this embodiment, an example is shown in which the base material 11 has a rectangular shape that is longer in the width direction than in the longitudinal direction of the diaper 2, and the longitudinal dimensions of the fixed portion 11a and the extending portion 11b are equal to each other. The base material 11 is formed of, for example, a woven fabric or a non-woven fabric.

[0014] The adhesive material 12 is attached to the skin side of the extending portion 11b of the base material 11. The adhesive material 12 of this embodiment has a rectangular shape that is shorter in the width direction than the extending portion 11b of the base material 11, and is overlapped only with a part of the extending portion 11b in the width direction. The fixing material 12 is fixed to a target zone (target sheet 26 described later) set on the non-skin side of the front body part 2A. The fixing material 12 is formed of, for example, a woven fabric, a non-woven fabric, or a resin film. The fixing material 12 of the present embodiment constitutes a fastening mechanism together with the target sheet 26. As this fastening mechanism, for example, a planar fastener that is mechanically coupled by a hook material (male member) and a loop material (female member) can be applied. Note that the fastening mechanism is not limited to this, and an adhesive or an adhesive tape may be applied.

[0015] <Absorbent body> As shown in FIGS. 1 and 2, the absorbent body 21 is a mat-like member having liquid absorption properties. The absorbent body 21 is formed, for example, by enclosing a mat in which a superabsorbent polymer (SAP) is mixed with fluff pulp with a core wrap sheet such as a hydrophilic non-woven fabric or tissue paper. The absorbent body 21 has a larger thickness dimension (dimension in the thickness direction) than the tape 1 and the sheets 22 to 26. The absorbent body 21 of the present embodiment has a uniform thickness dimension throughout.

[0016] The absorbent body 21 extends in the longitudinal direction over the front body part 2A, the crotch part 2C, and the back body part 2B. The absorbent body 21 is disposed in a region including a location where excreta such as urine and feces can be excreted from the wearer. Here, an example of the absorbent body 21 provided on the non-skin side and at the central part in the width direction with respect to the top sheet 22 described later and on the skin side and at the central part in the width direction with respect to the back sheet 24 and the cover sheet 25 described later is illustrated.

[0017] <Sheet> The sheets 22 to 26 are all sheet-like members that spread along the longitudinal direction and the width direction in the unfolded state. On the skin side of the absorber 21, a liquid-permeable topsheet 22 (inner sheet) is disposed. The topsheet 22 is formed longer than the absorber 21 in both the longitudinal and width directions, and covers the absorber 21 from the skin side. The topsheet 22 extends on the skin side surface (inner surface) of the diaper 2 and forms a skin-facing surface facing the wearer's skin. The topsheet 22 is formed of, for example, a woven fabric or a non-woven fabric. Here, the topsheet 22 having a rectangular shape in the thickness direction view is exemplified.

[0018] The topsheet 22 of the present embodiment is provided over the entire longitudinal direction of the diaper 2. That is, as shown in FIG. 2, the topsheet 22 extends between one edge portion 2f and the other edge portion 2r in the longitudinal direction of the diaper 2. Hereinafter, of the one edge portion 2f and the other edge portion 2r in the longitudinal direction of the diaper 2, one edge extending in the width direction on the front body 2A side is also referred to as the "ventral end portion 2f", and the other edge extending in the width direction on the back body 2B side is also referred to as the "dorsal end portion 2r".

[0019] On the outer side in the width direction of the topsheet 22, a side sheet 23 having liquid impermeability is disposed to prevent liquid leakage from the absorber 21 to the outer side in the width direction. The side sheet 23 is preferably formed of a material having air permeability and flexibility. Examples of the material applied to the side sheet 23 include SMS (Spunbond Meltblown Spunbond) non-woven fabric and SMMS (Spunbond Meltblown Meltblown Spunbond) non-woven fabric. A pair of side sheets 23 are provided on both sides in the width direction of the topsheet 22 and extend in the longitudinal direction. The side sheet 23 of the present embodiment is provided over the entire longitudinal direction of the diaper 2, similarly to the topsheet 22.

[0020] As shown in Fig. 1, on the non-skin side of the absorber 21, a liquid-impermeable backsheet 24 (outer sheet) is arranged to prevent liquid leakage from the absorber 21 to the non-skin side. The backsheet 24 is formed longer than the absorber 21 in the longitudinal and width directions and covers the absorber 21 from the non-skin side. The backsheet 24 of the present embodiment extends between the ventral end 2f and the dorsal end 2r of the diaper 2. The backsheet 24 is formed of, for example, a film.

[0021] On the non-skin side of the backsheet 24, a cover sheet 25 (outer sheet) is arranged to reinforce the backsheet 24 and improve the tactile sensation (e.g., touch). The cover sheet 25 of the present embodiment is formed longer than the backsheet 24 in the width direction and longer than the absorber 21 in the longitudinal and width directions, and covers the absorber 21 from the skin side. The cover sheet 25 extends on the non-skin side surface (outer surface) of the diaper 2. The cover sheet 25 extends between the ventral end 2f and the dorsal end 2r of the diaper 2. The cover sheet 25 is formed of, for example, a woven fabric or a non-woven fabric. As described above, each of the backsheet 24 and the cover sheet 25 extends between the ventral end 2f and the dorsal end 2r of the diaper 2. Therefore, the end on the front body 2A side of these sheets 24, 25 forms the ventral end 2f, and the end on the back body 2B side of these sheets 24, 25 forms the dorsal end 2r.

[0022] The topsheet 22, the absorber 21, the backsheet 24, and the cover sheet 25 laminated in the thickness direction at the central portion in the width direction of the diaper 2 are fixed with a known adhesive (e.g., a hot melt adhesive). Similarly, the side sheets 23 and the cover sheet 25 laminated in the thickness direction on both sides in the width direction of the diaper 2 are fixed with a known adhesive. Note that the fixing portion 11a of the base material 11 of the tape 1 is sandwiched between the cover sheet 25 and the side sheet 23.

[0023] A target sheet 26 forming a target zone where the fixing material 12 of the tape 1 is fixed is attached to the non-skin side surface of the cover sheet 25. Here, the target sheet 26 provided on the front body 2A is exemplified. The target sheet 26 is a sheet-like member having a function as an adhesion destination of the tape 1. The target sheet 26 of the present embodiment is rectangular in shape with a dimension in the width direction larger than that in the longitudinal direction when viewed in the thickness direction, and extends in the width direction.

[0024] <Gather> The gathers 27 to 29 are formed by wrinkling the side sheet 23, the cover sheet 25, etc. into a pleated shape by an elastic member such as rubber, a stretch film, or polyurethane. The gathers 27 to 29 have a function of enhancing the fit of the diaper 2 to the wearer. Note that FIGS. 1, 2 and FIGS. 3, 5, 10 described later show the diaper 2 with the wrinkles of the gathers 27 to 29 stretched.

[0025] The three-dimensional gather 27 is formed by wrinkling the inner portion in the width direction of the side sheet 23 in the longitudinal direction so as to be stretchable by the elastic member 27a (longitudinal stretchable portion). The elastic member 27a of the three-dimensional gather 27 is provided on both sides of the top sheet 22 on the skin side and with respect to the center line O in the width direction, extends in the longitudinal direction, and is stretchable in the longitudinal direction. Here, an example of the three-dimensional gather 27 in which a plurality of thread-like elastic members 27a are provided at intervals in the width direction is shown. The three-dimensional gather 27 stands up on the skin side as the elastic member 27a contracts in the longitudinal direction.

[0026] The leg gather 28 is provided at a location along the legs of the wearer in the diaper 2. The leg gather 28 is formed, for example, by wrinkling the side sheet 23, the back sheet 24, and the cover sheet 25 in the longitudinal direction so as to be stretchable by the elastic member 28a (longitudinal stretchable portion). The elastic member 28a of the leg gather 28 of the present embodiment is provided on both sides with respect to the center line O in the width direction and outside the top sheet 22 in the width direction, extends in the longitudinal direction, and is stretchable in the longitudinal direction. Here, an example of the leg gather 28 in which a plurality of thread-like elastic members 28a are provided at intervals in the width direction is shown.

[0027] As described above, the disposable diaper 2 of the present embodiment is configured to be stretchable in the longitudinal direction, and is provided with elastic members 27a of a pair of three-dimensional gathers 27 spaced apart from each other in the width direction and elastic members 28a of a pair of leg gathers 28 spaced apart from each other in the width direction. The disposable diaper 2 is configured to be easily curved in a posture with the skin side on the inside by the elastic members 27a and 28a of the three-dimensional gathers 27 and the leg gathers 28 contracting in the longitudinal direction on both sides with respect to the center line O in the width direction. Hereinafter, the elastic members 27a and 28a of the three-dimensional gathers 27 and the leg gathers 28 are also referred to as "longitudinal stretchable portions 27a and 28a".

[0028] The waist gather 29 is provided at a position facing the waist (above the buttocks) of the wearer in the disposable diaper 2. The waist gather 29 has a function of enhancing the fit of the back body 2B to the waist of the wearer. The waist gather 29 of the present embodiment is configured such that the sheets 22 to 25 are wrinkled and gathered in the width direction by the waist sheet 29s so as to be stretchable. The waist sheet 29s is formed by fixing an elastic member 29a (lateral stretchable portion) in a state of being extended in the width direction between non-woven fabrics 29d overlapped in the thickness direction. The elastic member 29a of the waist sheet 29s extends along the width direction and is stretchable in the width direction. Here, a waist sheet 29s in which a plurality of thread-like elastic members 29a are provided at intervals in the longitudinal direction is exemplified. Hereinafter, the elastic member 29a of the waist sheet 29s is also referred to as "lateral stretchable portion 29a".

[0029] [1-2. Configuration of Main Portions] As shown in FIG. 3, one longitudinal edge portion 3 (hereinafter, also referred to as "absorption trailing edge portion 3") of the absorber 21 is disposed at the back body 2B of the disposable diaper 2. In other words, the absorber 21 has the absorption trailing edge portion 3 disposed up to the back body 2B. The absorption trailing edge portion 3 is located inside the disposable diaper 2 in the longitudinal direction from the back end portion 2r. The absorption trailing edge 3 of the present embodiment includes a horizontal portion 3a extending along the width direction, and two inclined portions 3b symmetrically extending outward in the width direction from both ends of the horizontal portion 3a in the width direction and toward the thigh portion 2C side (the main region 40 side described later). The horizontal portion 3a forms the central portion in the width direction of the absorption trailing edge 3, and the inclined portion 3b forms the outer portion in the width direction of the absorption trailing edge 3. Further, the horizontal portion 3a of the present embodiment forms a terminal portion 3c located at the outermost (back side end 2r side) in the longitudinal direction of the absorption trailing edge 3.

[0030] Here, among the absorber 21, the longitudinal end portion including the absorption trailing edge 3 is also referred to as an end region 30, and the portion adjacent to the thigh portion 2C side of the end region 30 is also referred to as a main region 40. In FIG. 3, the boundary line L between the end region 30 and the main region 40 is shown by a two-dot chain line. In the present embodiment, since the absorption trailing edge 3 includes the horizontal portion 3a and the inclined portion 3b as described above, the end region 30 forms an isosceles trapezoid having the horizontal portion 3a as the upper base and the inclined portion 3b as the legs in a view in the thickness direction. Therefore, the absorber 21 has a shape in which the corner portions on both sides in the width direction in the end region 30 are chamfered. Note that the lower base of the isosceles trapezoid formed by the end region 30 corresponds to the boundary line L between the end region 30 and the main region 40.

[0031] On the other hand, the main region 40 of the present embodiment forms a rectangular shape having the boundary line L with the end region 30 as one side in a view in the thickness direction. The main region 40 includes both edge portions 5 in the width direction of the absorber 21 (hereinafter, also referred to as "absorption side edge portions 5"). The absorption side edge portion 5 of the present embodiment extends linearly along the longitudinal direction. Thus, in the present embodiment, the width dimension (dimension in the width direction) of the end region 30 is smaller than the width dimension of the main region 40. More specifically, the width dimension of the end region 30 becomes smaller as it is separated from the main region 40 (toward the horizontal portion 3a).

[0032] The absorber 21 of this embodiment has slits 6 extending in the width direction. The slit 6 is a through hole that penetrates the absorber 21 in the thickness direction. As shown in FIG. 1, an example is shown here in which a plurality of slits 6 are arranged at intervals in the longitudinal direction. Note that the absorber 21 may have a thin portion (concave portion) that extends in the width direction and has a smaller thickness dimension than the periphery, instead of (or in addition to) the slit 6.

[0033] The other edge portion 4 in the longitudinal direction of the absorber 21 (hereinafter, also referred to as the "front absorption edge portion 4") is disposed in the front body portion 2A and is located inside the ventral end portion 2f of the diaper 2 in the longitudinal direction. Here, an example of the front absorption edge portion 4 formed symmetrically with the rear absorption edge portion 3 is illustrated. The absorber 21 is formed by cutting a long body in which the edge corresponding to the absorption side edge portion 5 is continuous in the longitudinal direction (conveying direction) at positions corresponding to the rear absorption edge portion 3 and the front absorption edge portion 4, so that a plurality of absorbers 21 are cut out from the long body. In this way, in the absorber 21, the rear absorption edge portion 3 and the front absorption edge portion 4 that are cut during the manufacturing process form a sharper angle than the absorption side edge portion 5 that is not cut.

[0034] As shown in FIGS. 3 and 4, the back sheet 24 and the cover sheet 25 have an outer fold line 7 extending along the rear absorption edge portion 3. The outer fold line 7 of this embodiment includes a horizontal fold line 7a extending along the horizontal portion 3a of the rear absorption edge portion 3 and an inclined fold line 7b extending along the inclined portion 3b of the rear absorption edge portion 3. The outer fold line 7 forms a valley fold state when viewed from the non-skin side. In other words, the back sheet 24 and the cover sheet 25 are bent toward the non-skin side with the outer fold line 7 as the bottom (base).

[0035] As shown in FIG. 4, the outer fold line 7 of the present embodiment is provided by the backsheet 24 and the cover sheet 25 forming steps 24a and 25a corresponding to the thickness of the absorber 21. That is, the backsheet 24 and the cover sheet 25 are provided along the non-skin side surface of the absorber 21 in the longitudinal direction, and cover the absorption trailing edge portion 3 from both the non-skin side and the outer side in the longitudinal direction. Thereby, the backsheet 24 and the cover sheet 25 form steps 24a and 25a that stand upright in the thickness direction on the outer side in the longitudinal direction of the absorption trailing edge portion 3.

[0036] Note that while the backsheet 24 and the cover sheet 25 form steps 24a and 25a at positions corresponding to the absorption trailing edge portion 3 in this way, the topsheet 22 is flat at the position corresponding to the absorption trailing edge portion 3. The backsheet 24 and the cover sheet 25 are fixed to the topsheet 22 on the outer side in the longitudinal direction (the absorption trailing edge portion 3 side in the longitudinal direction in the topsheet 22) than the absorber 21.

[0037] The lateral expansion / contraction portion 29a is provided within the longitudinal range R from the end portion 3c of the absorption trailing edge portion 3 to the dorsal end portion 2r. Hereinafter, this range R is also referred to as the "outer range R". The outer range R includes not only the region between the end portion 3c and the dorsal end portion 2r in the longitudinal direction, but also the regions overlapping the end portion 3c and the dorsal end portion 2r. The outer range R of the present embodiment extends from the horizontal portion 3a forming the end portion 3c to the dorsal end portion 2r corresponding to the end portion on the back body 2B side of the cover sheet 25. All of the lateral expansion / contraction portions 29a of the present embodiment are outer expansion / contraction portions 29e arranged on the outer side in the longitudinal direction (the dorsal end portion 2r side) than the end portion 3c. The outer expansion / contraction portion 29e is expandable and contractible in the width direction on the outer side in the longitudinal direction than the end portion 3c (that is, on the outer side in the longitudinal direction than the outer fold line 7).

[0038] Here, the region where the lateral expansion and contraction portion 29a is provided is also referred to as the "lateral expansion and contraction region 20". As shown in FIGS. 3 and 5, the lateral expansion and contraction region 20 of the present embodiment includes a plurality of lateral expansion and contraction portions 29a provided at intervals in the longitudinal direction. Specifically, the lateral expansion and contraction region 20 is a longitudinal region from the lateral expansion and contraction portion 29a disposed at the innermost side (the end portion 3c side) in the longitudinal direction to the lateral expansion and contraction portion 29a disposed at the outermost side (the back side end portion 2r side) in the longitudinal direction.

[0039] The lateral expansion and contraction region 20 has two large expansion and contraction regions 29B provided at intervals in the width direction and a small expansion and contraction region 29C set between the large expansion and contraction regions 29B. The large expansion and contraction regions 29B are set on both sides in the width direction of the diaper 2 (with the center line O in the width direction sandwiched therebetween). On the other hand, the small expansion and contraction region 29C is provided overlapping the center line O in the width direction of the diaper 2. The small expansion and contraction region 29C expands and contracts less than the large expansion and contraction regions 29B. In other words, the elastic force (contracting force) applied to the sheets 22 to 25 by the lateral expansion and contraction portions 29a is smaller in the small expansion and contraction region 29C than in the large expansion and contraction regions 29B. In the present embodiment, the number of the lateral expansion and contraction portions 29a is set to be smaller in the small expansion and contraction region 29C than in the large expansion and contraction regions 29B, so that the small expansion and contraction region 29C is configured to expand and contract less than the large expansion and contraction regions 29B.

[0040] In the present embodiment, the small expansion and contraction region 29C is aligned in the width direction with respect to the horizontal portion 3a of the absorption trailing edge portion 3. Further, the lateral expansion and contraction portions 29a disposed in the small expansion and contraction region 29C are spaced apart from the horizontal portion 3a of the absorption trailing edge portion 3. Thereby, in the region between the lateral expansion and contraction portions 29a disposed in the small expansion and contraction region 29C and the horizontal portion 3a of the absorption trailing edge portion 3, wrinkles due to the waist gathers 29 are less likely to occur compared to the large expansion and contraction regions 29B.

[0041] As shown in FIG. 10, the tape 1 of the present embodiment overlaps with an extension line E (hereinafter, also referred to as “terminal extension line E”) obtained by extending the end portion 3c of the absorption trailing edge portion 3 in the width direction. More specifically, each of the base material 11 and the fixing material 12 overlaps with the terminal extension line E. In the present embodiment, each of the end portion 11c on the thigh portion 2C side in the fixing portion 11a of the base material 11 and the end portion 12c on the thigh portion 2C side of the fixing material 12 is provided on the thigh portion 2C side (inner side in the longitudinal direction) rather than the terminal extension line E. Note that the arrangement of the tape 1 is not limited to that exemplified here.

[0042] As shown in FIGS. 5 and 10, the longitudinal expansion and contraction portions 27a and 28a of the three-dimensional gathers 27 and the leg gathers 28 are arranged on the inner side in the longitudinal direction rather than the outer folding line 7 and the absorption trailing edge portion 3. Thereby, the longitudinal expansion and contraction portions 27a and 28a can expand and contract in the longitudinal direction on the inner side in the longitudinal direction (thigh portion 2C side) rather than the outer folding line 7 and the absorption trailing edge portion 3. Note that, in order to make the inner folding line 8 described below easier to see, FIG. 5 shows the three-dimensional gathers 27 in a standing state.

[0043] As shown in FIG. 5, the topsheet 22 of the present embodiment has a groove 9 extending in the width direction and an inner folding line 8 extending along the absorption side edge portion 5. The groove 9 has a shape that is recessed toward the non-skin side on the skin-side surface of the topsheet 22, and is formed, for example, by embossing the topsheet 22. Here, an example is shown in which a large number of linear grooves 9 are arranged at intervals in the longitudinal direction. Note that the groove 9 only needs to extend in the width direction as a whole, and may be, for example, wavy extending in the width direction.

[0044] As shown in FIGS. 5 and 6, the inner folding line 8 forms a valley-folded state when viewed from the skin side. In other words, the topsheet 22 is bent toward the skin side with the inner folding line 8 as the bottom (base). The inner fold line 8 of the present embodiment is provided by the top sheet 22 forming a step 22a corresponding to the thickness of the absorber 21. That is, the top sheet 22 is provided along the surface on the skin side of the absorber 21 over the width direction, covering the absorption side edge 5 from both the skin side and the outer side in the width direction. As a result, the top sheet 22 forms a step 22a standing in the thickness direction on the outer side in the width direction of the absorption side edge 5. Note that while the top sheet 22 forms the step 22a at the position corresponding to the absorption side edge 5 in this way, the back sheet 24 and the cover sheet 25 are flat at the position corresponding to the absorption side edge 5.

[0045] [2. Action and Effect] (1) According to the diaper 2, since the back sheet 24 and the cover sheet 25 have an outer fold line 7 that extends along the absorption trailing edge 3 and forms a valley-fold state when viewed from the non-skin side, it bends toward the non-skin side with the outer fold line 7 as the bottom. As a result, as shown in FIG. 7, in the diaper 2 in the worn state, the back side end 2r side of the cover sheet 25 beyond the outer fold line 7 adheres closely to the wearer's waist by the tape 1 or the waist gathers 29, while the crotch 2C side (the lower side in FIG. 7) beyond the outer fold line 7 bends toward the non-skin side and is likely to separate from the wearer's skin H. Note that in FIGS. 7 and 8 described later, the diaper 2 is schematically shown and the back sheet 24 etc. are omitted, but the back sheet 24 also bends toward the non-skin side on the crotch 2C side beyond the outer fold line 7 in the same manner as the above-described cover sheet 25, making it likely to separate from the wearer's skin H.

[0046] Therefore, according to the diaper 2, the back body 2B is more likely to be arranged with a gap S with respect to the muscle H that curves outward from the wearer's back to the buttocks. In this way, the gap S provided between the back body 2B and the muscle H by the outer fold line 7 functions like a pocket for accommodating excrement (e.g., defecation), thereby suppressing the contact between the excrement and the muscle H. Also, since the provision of the gap S suppresses the absorber 21 from being pressed against the muscle H through the topsheet 22, the occurrence of skin problems can be suppressed even when there is no excrement. Therefore, the wearing comfort of the diaper 2 can be improved. Also, since the gap S is formed by a simple configuration of providing the outer fold line 7, the cost increase can be suppressed compared to conventional diapers with pockets.

[0047] (2) Since the outer fold line 7 is provided by the backsheet 24 and the cover sheet 25 forming steps 24a, 25a corresponding to the thickness of the absorber 21, the outer fold line 7 can be formed at an appropriate position with a simple configuration by utilizing the steps 24a, 25a caused by the thickness of the absorber 21. Therefore, the above-mentioned gap S can be formed more appropriately, and the cost increase can be further suppressed.

[0048] (3) Since the width dimension of the end region 30 of the absorber 21 is smaller than the width dimension of the main region 40, while ensuring liquid absorption in the main region 40, the end region 30 can be bent more easily than the main region 40. Thereby, while maintaining the function of the absorber 21, the end region 30 can be bent more easily following the backsheet 24 and the cover sheet 25 that are in a valley-fold state at the outer fold line 7, so that the above-mentioned gap S can be formed more reliably. Therefore, the wearing comfort of the diaper 2 can be improved more reliably.

[0049] (4) As shown in FIG. 3, since the end region 30 forms an isosceles trapezoid having the horizontal portion 3a of the absorption trailing edge portion 3 as the upper base and the inclined portion 3b as the leg in the thickness direction view, the absorber 21 is likely to bend along the boundary line L between the end region 30 and the main region 40. Accordingly, following the back sheet 24 and the cover sheet 25 that are in a valley-folded state at the outer fold line 7, the end region 30 is more appropriately bendable, so that the above-described gap S can be formed more reliably. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0050] (5) Since the outer fold line 7 includes a horizontal fold line 7a and an inclined fold line 7b that extend along the horizontal portion 3a and the inclined portion 3b of the absorption trailing edge portion 3, respectively, the back sheet 24 and the cover sheet 25 can be curved into a three-dimensional shape adapted to the skin H of the wearer. Therefore, since the above-described gap S can be formed more appropriately, the wearing comfort of the diaper 2 can be more reliably improved, and an extra bulge in the back body 2B can be suppressed, contributing to an improvement in appearance.

[0051] (6) Since the top sheet 22 extends along the absorption side edge portion 5 and has an inner fold line 8 that is in a valley-folded state when viewed from the skin side, it bends toward the skin side with the inner fold line 8 as the bottom. As a result, as shown in FIG. 8, the outer portion in the width direction of the top sheet 22 beyond the inner fold line 8 is folded up toward the skin side, making it easier to adhere to the skin of the wearer. For this reason, leakage in the width direction of excrement (so-called side leakage) can be suppressed. In particular, in the present embodiment, the longitudinal stretchable portions 27a and 28a are provided outside the inner fold line 8 in the width direction. For this reason, due to the synergistic effect of the bending of the top sheet 22 toward the skin side by the inner fold line 8 and the improvement in the fitting property by the longitudinal stretchable portions 27a and 28a, side leakage can be effectively suppressed.

[0052] (7) Since the inner fold line 8 is provided by the top sheet 22 forming a step 22a corresponding to the thickness of the absorber 21, the inner fold line 8 can be formed at an appropriate position with a simple configuration using the step 22a caused by the thickness of the absorber 21. Therefore, the top sheet 22 can be more appropriately bent toward the skin side as described above, and an increase in cost can be further suppressed.

[0053] (8) Since the longitudinally expandable longitudinal expansion parts 27a and 28a are arranged inside the outer fold line 7 in the longitudinal direction, while enhancing the fit of the diaper 2, the influence of the longitudinal expansion of the longitudinal expansion parts 27a and 28a on the outer fold line 7 can be suppressed. Therefore, while suppressing lateral leakage by the longitudinal expansion parts 27a and 28a (the three-dimensional gathers 27 and the leg gathers 28), an appropriate valley-fold state can be realized at the outer fold line 7. Thereby, while suppressing the leakage of excrement, the wearing comfort of the diaper 2 can be improved while suppressing the increase in cost as described above.

[0054] (9) Since the laterally expandable lateral expansion part 29a is provided within the outer range R, the diaper 2 can be made to closely adhere to the wearer's waist in the outer range R (the fit of the outer range R can be enhanced). As a result, since the diaper 2 is more likely to bend further to the non-skin side with the outer fold line 7 as the bottom, the wearing comfort of the diaper 2 can be more reliably improved.

[0055] (10) Since the lateral expansion part 29a includes the outer expansion part 29e provided outside the longitudinal direction of the end part 3c, while enhancing the fit of the diaper 2, the influence of the lateral expansion of the lateral expansion part 29a on the outer fold line 7 can be suppressed. Therefore, the leakage of excrement (so-called back leakage) from the dorsal end part 2r can be suppressed by the lateral expansion part 29a (the waist gathers 29), and an appropriate valley-fold state can be realized at the outer fold line 7. Thereby, while suppressing the leakage of excrement, the wearing comfort of the diaper 2 can be improved while suppressing the increase in cost as described above.

[0056] (11) In the lateral expansion region 20 where the lateral expansion part 29a is arranged, since the small expansion region 29C set between the large expansion regions 29B expands less than the large expansion regions 29B, while ensuring the fit by the large expansion regions 29B, the influence of the lateral expansion part 29a on the outer fold line 7 can be suppressed by the small expansion region 29C. Therefore, while maintaining the function of the lateral expansion part 29a, the wearing comfort of the diaper 2 can be enhanced as described above by the outer fold line 7 being appropriately in a valley-fold state.

[0057] In addition, in the present embodiment, since the positions of the small stretchable region 29C and the horizontal portion 3a of the absorption trailing edge 3 in the width direction are aligned, the influence of the waist gather 29 on the horizontal portion 3a of the absorption trailing edge 3 can be effectively suppressed. As a result, a more appropriate valley-folded state can be realized particularly at the horizontal fold line 7a. Furthermore, in the present embodiment, since the lateral stretchable portion 29a disposed in the small stretchable region 29C and the horizontal portion 3a of the absorption trailing edge 3 are separated from each other, wrinkles due to the waist gather 29 are less likely to occur in the region between the two. Also by this, a more appropriate valley-folded state can be realized at the horizontal fold line 7a.

[0058] (12) Since the topsheet 22 has a groove 9 extending in the width direction, it is easy to bend along the groove 9 as a folding line. As a result, the topsheet 22 can be more appropriately bent following the backsheet 24 and the cover sheet 25 that are in a valley-folded state at the outer fold line 7, so that the above-mentioned gap S can be formed more reliably. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0059] (13) Since the absorber 21 has a slit 6 extending in the width direction, it is easy to bend along the slit 6 as a folding line. As a result, the absorber 21 can be more appropriately bent following the backsheet 24 and the cover sheet 25 that are in a valley-folded state at the outer fold line 7, so that the above-mentioned gap S can be formed more reliably. Therefore, the wearing comfort of the diaper 2 can be more reliably improved. Note that the same operation and effect can also be obtained by an absorber 21 provided with a thin portion instead of the slit 6.

[0060] [3. Modification Example] [3-1. Lateral Elastic Portion] As shown in FIG. 11, the lateral expansion / contraction portion 29a may include (or instead of) an overlapping expansion / contraction portion 29f provided overlapping the end portion 3c or the end extension line E, in addition to the outer expansion / contraction portion 29e provided outside in the longitudinal direction than the end portion 3c. Here, two overlapping expansion / contraction portions 29f provided on both sides with respect to the center line O in the width direction and overlapping the end extension line E without overlapping the end portion 3c of the absorption trailing edge portion 3 are exemplified. In FIG. 11, in order to make the overlapping expansion / contraction portion 29f easier to see, the portion of the end extension line E overlapping the overlapping expansion / contraction portion 29f is omitted. The overlapping expansion / contraction portion 29f is disposed in the large expansion / contraction region 29B. The inner end portion of the overlapping expansion / contraction portion 29f in the width direction is provided side by side in the longitudinal direction with the inclined portion 3b of the absorption trailing edge portion 3 and is located inside in the width direction (center line O side) than the absorption side edge portion 5. Note that the arrangement and number of the overlapping expansion / contraction portions 29f are not limited to the example shown here.

[0061] In the diaper 2 of this modification, since the lateral expansion / contraction portion 29a includes the overlapping expansion / contraction portion 29f provided overlapping the end extension line E, the diaper 2 can be brought into close contact with the wearer's waist at the position of the end extension line E (the fitness at the position of the end extension line E can be improved). As a result, since the diaper 2 is more likely to bend with the end extension line E extending in the width direction as a base, the valley-folded state at the outer fold line 7 can be more reliably realized. Therefore, the wearing comfort of the diaper 2 can be more reliably improved. Note that when the overlapping expansion / contraction portion 29f is provided overlapping the end portion 3c, the diaper 2 can be brought into close contact with the wearer's waist at the position of the end portion 3c (the fitness at the position of the end portion 3c can be improved). As a result, since the diaper 2 is more likely to bend with the end portion 3c as a base, the valley-folded state at the outer fold line 7 can be more reliably realized in the same manner as above. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0062] Also, in the overlapping telescopic portion 29f that overlaps with the end extension line E, if the inner end in the width direction is provided side by side in the longitudinal direction with the inclined portion 3b of the absorption trailing edge portion 3, while avoiding interference between the overlapping telescopic portion 29f and the absorption trailing edge portion 3, the dimensional accuracy of the overlapping telescopic portion 29f in the width direction can be ensured. Therefore, while suppressing the influence on the absorber 21 due to the expansion and contraction of the overlapping telescopic portion 29f, the valley-folded state at the outer fold line 7 can be more reliably realized. In addition, according to the diaper 2 of this modified example, the same operations and effects can be obtained from the same configuration as in the above-described embodiment.

[0063] [3-2. Tape] <First Modified Example> As shown in FIG. 12, the tape 1 may be provided within the above-described outer range R. In this modified example, the tape 1 disposed within the outer range R and on the outer side in the longitudinal direction (toward the back-side end 2r) than the end portion 3c is exemplified. That is, in the tape 1 of this modified example, the entire base material 11 and the fastening material 12 are provided on the outer side in the longitudinal direction than the end portion 3c. Therefore, neither the end portion 11c on the crotch portion 2C side of the fixing portion 11a of the base material 11 nor the end portion 12c on the crotch portion 2C side of the fastening material 12 overlaps with the end extension line E, and they are disposed on the back-side end 2r side than the end extension line E.

[0064] According to the diaper 2 of this modified example, since the tape 1 is provided within the outer range R, in the mounted state where the fastening material 12 of the tape 1 is fastened to the target sheet 26, the diaper 2 can be closely attached to the wearer's waist in the outer range R (the fitness of the outer range R can be improved). As a result, since the diaper 2 is likely to bend to the non-skin side with the outer fold line 7 as the bottom, the wearing comfort of the diaper 2 can be more reliably improved as described above.

[0065] Also, in this modified example, the fastening material 12 of the tape 1 is provided outside the end portion 3c in the longitudinal direction. Therefore, in the worn state, while enhancing the fit of the outer range R as described above, the influence of the fastening of the fastening material 12 on the outer fold line 7 can be suppressed. Accordingly, while suppressing the leakage of excrement from the back side end portion 2r (so-called back leakage), an appropriate valley-fold state can be realized at the outer fold line 7. Thereby, while suppressing the leakage of excrement, the wearing comfort of the diaper 2 can be improved as described above.

[0066] On the other hand, since the fixing portion 11a fixed to the cover sheet 25 acts to pull the cover sheet 25 outward in the width direction in the worn state, there is a risk of easily affecting the outer fold line 7 of the cover sheet 25. In contrast, in this modified example, since the fixing portion 11a of the base material 11 of the tape 1 is provided outside the end portion 3c in the longitudinal direction, in the worn state, while enhancing the fit of the outer range R as described above, the influence of the pulling of the fixing portion 11a on the outer fold line 7 can be suppressed. Accordingly, as described above, while suppressing the leakage of excrement, the wearing comfort of the diaper 2 can be improved. In addition, according to the diaper 2 of this modified example, the same operations and effects can be obtained from the same configuration as in the above-described embodiment.

[0067] <Second Modified Example> As shown in FIG. 13, in the tape 1, the end portion 12c on the crotch portion 2C side of the fastening material 12 may be provided so as to overlap the end extension line E. In addition to (or instead of) this, the end portion 11c on the crotch portion 2C side of the fixing portion 11a of the base material 11 may be provided so as to overlap the end extension line E.

[0068] In this modified example, since the end portion 12c on the crotch part 2C side of the fastening material 12 is provided so as to overlap with the terminal extension line E, in the mounted state where the fastening material 12 is fastened to the target sheet 26, the diaper 2 can be brought into close contact with the wearer's waist at the position of the terminal extension line E (the fitness at the position of the terminal extension line E can be enhanced). As a result, since the diaper 2 is likely to bend with the terminal extension line E as the base, the valley-folded state at the outer fold line 7 can be more reliably realized. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0069] Further, in this modified example, since the end portion 11c on the crotch part 2C side of the fixing portion 11a of the base material 11 is provided so as to overlap with the terminal extension line E, as described above, the diaper 2 can be brought into close contact with the wearer's waist at the position of the terminal extension line E in the mounted state. Therefore, the wearing comfort of the diaper 2 can be more reliably improved in the same manner as above. In addition, according to the diaper 2 of this modified example, the same operations and effects can be obtained from the same configuration as in the above-described embodiment.

[0070] <Third Modified Example> The shape of the tape 1 is not limited to a rectangular shape. For example, as shown in FIG. 14, in the base material 11 of the tape 1, the fixing portion 11a may have a rectangular shape that is longer in the longitudinal direction than in the width direction, and the extending portion 11b may have a trapezoidal shape with two parallel sides extending along the longitudinal direction as the bases. Here, an example of the base material 11 in which the dimension in the longitudinal direction of the fixing portion 11a is larger than the dimension (maximum dimension) in the longitudinal direction of the extending portion 11b is illustrated. In the tape 1 of this modified example, the end portion 11c on the crotch part 2C side of the fixing portion 11a of the base material 11 is located on the crotch part 2C side (the inner side in the longitudinal direction) of the end portion 12c on the crotch part 2C side of the fastening material 12. Note that in the tape 1 of this modified example, the fastening material 12 adhered to the extending portion 11b of the base material 11 also has a trapezoidal shape corresponding to the extending portion 11b.

[0071] In the diaper 2 of this modification example, when the fixing portion 11a of the base material 11 of the tape 1 is pulled outward in the width direction in the worn state, the end portion 11c on the crotch portion 2C side of the fixing portion 11a is easily bent with the base portion as the base. Even in such a diaper 2, if the entire base material 11 and the fixing material 12 are provided outside in the longitudinal direction rather than the end portion 3c, as described in the first modification example above, the fit of the outer range R in the worn state can be improved while suppressing the influence on the outer fold line 7. Therefore, while suppressing the leakage of excrement, the wearing comfort of the diaper 2 can be improved.

[0072] Also, in the tape 1 of this modification example, if the end portion 11c on the crotch portion 2C side in the fixing portion 11a of the base material 11 is provided overlapping the end extension line E, as described in the second modification example above, the diaper 2 is easily bent with the end extension line E as the base portion, so that the valley-folded state at the outer fold line 7 can be more reliably realized. In addition, according to the diaper 2 of this modification example, the same operations and effects can be obtained from the same configuration as in the above-described embodiment.

[0073] [3-3. Others] The shape of the absorber 21 described above is an example. The absorber 21 may be rectangular or hourglass-shaped when viewed in the thickness direction. Also, the shape of the end region 30 is not limited to the isosceles trapezoid as described above. The end region 30 may form, for example, a rectangular shape having a smaller width dimension than the main region 40 when viewed in the thickness direction.

[0074] The thickness dimension of the absorber 21 does not have to be uniform. For example, in the absorber 21, the thickness dimension of the end region 30 may be made smaller than the thickness dimension of the main region 40. According to such an absorber 21, while ensuring liquid absorption in the main region 40 having a large thickness dimension, the end region 30 thinner than the main region 40 can be easily bent. Thereby, while maintaining the function of the absorber 21, the end region 30 is easily bent following the backsheet 24 and the cover sheet 25 that are in a valley-folded state at the outer fold line 7, so that the gap S can be more reliably formed. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0075] The outer fold line 7 only needs to have a shape that extends along the absorption trailing edge 3. For example, the above-mentioned inclined fold line 7b may be omitted, or it may extend in a curved shape. Further, the outer fold line 7 may be provided on only one of the back sheet 24 and the cover sheet 25. However, if the outer fold line 7 is provided on both the back sheet 24 and the cover sheet 25 as in the above-described embodiment, since each of the back sheet 24 and the cover sheet 25 bends toward the non-skin side with the outer fold line 7 as the base, the above-mentioned gap S is more likely to be formed. Therefore, the wearing comfort of the diaper 2 can be more reliably improved.

[0076] The method of forming the outer fold line 7 and the inner fold line 8 is not limited to the method using the above-mentioned steps 22a, 24a, and 25a. Note that the inner fold line 8 may be omitted from the diaper 2. The arrangement of the gathers 27 to 29 with respect to the above-mentioned outer fold line 7 and inner fold line 8 is an example. Further, the waist gather 29 may be provided such that the elastic force of the lateral stretchable portion 29a is uniform in the width direction. That is, a configuration in which the degrees of stretch are different as in the above-mentioned large stretch region 29B and small stretch region 29C may be omitted.

[0077] In the unused state, the diaper 2 may be folded along a line corresponding to the outer fold line 7. For example, the unused diaper 2 may be folded into three folds at two locations, namely, a line corresponding to the horizontal fold line 7a and another line extending in the width direction at a position longitudinally spaced from the horizontal fold line 7a, and then stored in a packaging bag. According to such a diaper 2, since a crease is likely to be formed at a position corresponding to the outer fold line 7 in the unused state, a valley-fold state can be more reliably realized at the outer fold line 7 in the worn state. Therefore, while suppressing an increase in cost, the wearing comfort of the diaper 2 can be further reliably improved. Note that the configurations such as the above-mentioned outer fold line 7 and inner fold line 8 are not limited to the tape-type diaper 2, and may be applied to, for example, a pants-type diaper.

Explanation of Reference Numerals

[0078] 1 Tape (fastening tape) 2 Diaper Around the front body of 2A Around the back body of 2B Lower crotch part of 2C Ventral end part of 2f Dorsal end part (end part on the 2B side of the back body of the cover sheet 25) Absorption trailing edge (one edge in the longitudinal direction) Horizontal part of 3a Inclined part of 3b Terminal part of 3c Absorption leading edge of 4 Absorption side edges (both edges in the width direction) Slit of 6 Outer fold line of 7 Horizontal fold line of 7a Inclined fold line of 7b Inner fold line of 8 Groove of 9 Base material of 11 Fixing part of 11a Extended part of 11b End part on the 2C side of the crotch of the fixing part 11a Adhesive material of 12 End part on the 2C side of the crotch of the adhesive material 12 Lateral expansion region of 20 Absorbent body of 21 Top sheet (inner sheet) of 22 Step of 22a Side sheet of 23 Back sheet (outer sheet) of 24 Step of 24a Cover sheet (outer sheet) of 25 Step of 25a Target sheet of 26 Three-dimensional gather of 27 Elastic member (longitudinal expansion part) of 27a Leg gather of 28 Elastic member (longitudinal expansion part) of 28a Waist gather of 29 Elastic member (lateral expansion part) of 29a Large expansion region of 29B Small expansion region of 29C Non-woven fabric of 29d Outer expansion part of 29e Repeated expansion part of 29f 29s hip sheet 30 end region 40 main region E end extension line (extension line obtained by extending the end portion 3c in the width direction) H skin L boundary line O center line in the width direction R outer range (longitudinal range from the end portion 3c to the dorsal end 2r)

Claims

1. An absorber with one longitudinal edge portion arranged up to the back body part, An inner sheet that covers the absorber from the skin side, An outer sheet that covers the absorber from the non-skin side and is fixed to the one longitudinal edge portion side of the inner sheet, comprising: The outer sheet has an outer fold line that extends along the one edge portion and forms a valley-fold state when viewed from the non-skin side, In the absorber, the widthwise dimension of the end region including the one edge portion is smaller than the widthwise dimension of the main region adjacent to the crotch portion side of the end region, The one edge portion includes a horizontal portion extending along the width direction, and two inclined portions symmetrically extending outward in the width direction from both ends of the horizontal portion in the width direction and toward the main region, In a view in the thickness direction, the end region forms an isosceles trapezoid having the horizontal portion as the upper base and the inclined portions as the legs, The outer fold line includes a horizontal fold line extending along the horizontal portion and an inclined fold line extending along the inclined portion, A diaper, characterized in that.

2. An absorber with one longitudinal edge portion arranged up to the back body part, An inner sheet that covers the absorber from the skin side, An outer sheet that covers the absorber from the non-skin side and is fixed to the one longitudinal edge portion side of the inner sheet, comprising: The outer sheet has an outer fold line that extends along the one edge portion and forms a valley-fold state when viewed from the non-skin side, In the unused state, it is folded along a line corresponding to the outer fold line, A diaper, characterized in that.

3. An absorber with one longitudinal edge portion arranged up to the back body part, An inner sheet that covers the absorber from the skin side, An outer sheet that covers the absorber from the non-skin side and is fixed to the one longitudinal edge portion side of the inner sheet, A base material including a fixing portion fixed to the outer sheet at the back body part and an extending portion extending outward in the width direction from the outer sheet, and an adhering material that is attached to the skin side of the extending portion and is fastened to a target zone set on the non-skin side of the front body part, and an adhering tape provided within a longitudinal range from the end portion located most outward in the longitudinal direction of the one edge portion to the end portion on the back body part side of the outer sheet. The outer sheet has an outer fold line that extends along the one edge portion and forms a valley-folded state when viewed from the non-skin side. The adhering material is provided such that the end portion on the crotch part side thereof overlaps with an extension line obtained by extending the end portion in the width direction. A diaper, characterized by the above.

4. An absorber having one edge portion in the longitudinal direction disposed up to the back body part, An inner sheet that covers the absorber from the skin side, An outer sheet that covers the absorber from the non-skin side and is fixed to the one edge portion side in the longitudinal direction of the inner sheet, A base material including a fixing portion fixed to the outer sheet at the back body part and an extending portion extending outward in the width direction from the outer sheet, and an adhering material that is attached to the skin side of the extending portion and is fastened to a target zone set on the non-skin side of the front body part, and an adhering tape provided within a longitudinal range from the end portion located most outward in the longitudinal direction of the one edge portion to the end portion on the back body part side of the outer sheet. The outer sheet has an outer fold line that extends along the one edge portion and forms a valley-folded state when viewed from the non-skin side. The fixing portion is provided such that the end portion on the crotch part side thereof overlaps with an extension line obtained by extending the end portion in the width direction. A diaper, characterized by the above.

5. The outer fold line is provided by the outer sheet forming a step corresponding to the thickness of the absorber. A diaper according to any one of claims 1 to 4, characterized by the above.

6. The width dimension of the end region including the one edge portion of the absorber is smaller than the width dimension of the main region adjacent to the crotch portion side of the end region. The diaper according to any one of claims 2 to 4, or claim 5 citing any one of claims 2 to 4.

7. The one edge portion includes a horizontal portion extending along the width direction, and two inclined portions symmetrically extending outward in the width direction from both ends in the width direction of the horizontal portion and toward the main region. In a view in the thickness direction, the end region forms an isosceles trapezoid having the horizontal portion as the upper base and the inclined portions as the legs. The diaper according to claim 6.

8. The outer fold line includes a horizontal fold line extending along the horizontal portion and an inclined fold line extending along the inclined portion. The diaper according to claim 7.

9. The thickness dimension of the absorber in the thickness direction of the end region is smaller than the thickness dimension of the main region. The diaper according to claim 1, or any one of claims 6 to 8.

10. The inner sheet has inner fold lines extending along both edge portions in the width direction of the absorber and forming a valley-folded state when viewed from the skin side. The diaper according to any one of claims 1 to 9.

11. The inner fold lines are provided by the inner sheet forming steps corresponding to the thickness of the absorber. The diaper according to claim 10.

12. A laterally expandable and contractible portion is provided within the longitudinal range from the end portion located most outward in the longitudinal direction of the one edge portion to the end portion on the backsheet side of the outer sheet, and is capable of expanding and contracting in the width direction. The diaper according to any one of claims 1 to 11.

13. The lateral expansion / contraction part includes an outer expansion / contraction part provided on the outer side in the longitudinal direction than the end part. The diaper according to claim 12, characterized in that.

14. The lateral expansion / contraction part includes an overlapping expansion / contraction part provided overlapping with the end part or an extension line extending the end part in the width direction. The diaper according to claim 12 or 13, characterized in that.

15. The lateral expansion / contraction region where the lateral expansion / contraction part is arranged has large expansion / contraction regions set on both sides in the width direction and a small expansion / contraction region set between the large expansion / contraction regions and expanding / contracting smaller than the large expansion / contraction regions. The diaper according to any one of claims 12 to 14, characterized in that.

16. In the unused state, it is folded along a line corresponding to the outer fold line. The diaper according to claim 1, 3 or 4, or any one of claims 5 to 15 citing claim 1, 3 or 4, characterized in that.

17. A base material including a fixing part fixed to the outer sheet at the back body part and an extending part extending outward in the width direction than the outer sheet, and an adhering material attached to the skin side of the extending part and fastened to a target zone set on the non-skin side of the front body part, and having an adhering tape provided within a longitudinal range from the end part located most outside in the longitudinal direction of one edge part to the end part on the back body part side of the outer sheet. The diaper according to claim 1 or 2, or any one of claims 5 to 16 citing claim 1 or 2, characterized in that.

18. The adhering material is provided on the outer side in the longitudinal direction than the end part. The diaper according to claim 3 or 4, or claim 17, characterized in that.

19. The adhering material is provided with the end part on its crotch part side overlapping with an extension line extending the end part in the width direction. The diaper according to claim 4 or 17, characterized in that...

20. The fixing part is provided outside the end part in the longitudinal direction... The diaper according to any one of claim 3, claim 18 which cites claim 3, claim 4, claim 19 which cites claim 4, or claim 17 to 19 which cite claim 1 or 2, characterized in that...

21. The fixing part is provided such that the end part on the thigh part side overlaps with an extension line obtained by extending the end part in the width direction... The diaper according to any one of claim 3, claim 18 which cites claim 3, or claim 17 to 19 which cite claim 1 or 2, characterized in that...

22. The longitudinal dimension of the fixing part is larger than the longitudinal dimension of the extending part... The diaper according to claim 4, claim 20 which cites claim 4, or claim 20 or 21 which cite any one of claims 1 to 3, characterized in that...

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