absorbent articles

Abstract

To provide an absorbent article capable of suppressing liquid leakage and improving wearing feeling.SOLUTION: An absorbent article comprises: an absorber; a skin surface side sheet arranged on a skin surface side of the absorber; and a non-skin surface side sheet arranged on a non-skin surface side of the absorber. The absorber has: a first end side which is arranged on one end part side in a longitudinal direction and extends in a width direction; a pair of second end sides each of which is provided on one / the other of both outsides in a width direction of the first end sides, and extends in the longitudinal direction; and a third end side which connects the first end side and the second end sides on a center side of the absorber relative to a first virtual line obtained by extending the first end side and second virtual lines obtained by extending the second end sides. The absorbent article has a stretchable area arranged on one end part side of the longitudinal direction.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] BACKGROUND ART Absorbent articles that absorb liquids such as urine and body fluids excreted by a wearer are known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-97871 Summary of the Invention [Problem to be solved by the invention]

[0004] The absorbent article is provided with waist gathers to fit snugly around the waist of the wearer, and the waist gathers contract around the waist of the wearer, thereby enabling the absorbent article to fit snugly around the waist.

[0005] The radius of curvature around the waist of a wearer is larger near the ilium than on the back side, and by fitting the absorbent article in close contact with the waist of the wearer near the ilium, it is possible to improve the prevention of liquid leakage. However, the absorber end is located in the area of ​​the absorbent article that corresponds to the area near the ilium of the wearer's waist, and when the absorbent article contracts in this area, the absorber end also contracts, which may cause the absorber end to stiffen and reduce the comfort of wearing.

[0006] Therefore, an object of the present invention is to provide an absorbent article that can suppress liquid leakage while improving the wearing comfort. [Means for solving the problem]

[0007] In order to solve the above problem, in the present invention, an elastic region is provided at one end side in the longitudinal direction of the absorbent article.

[0008] In detail, the present invention relates to an absorbent article having a front body region located on the abdomen side of a wearer when worn, a crotch region located under the crotch, and a back body region located on the back side, arranged in this order in the longitudinal direction, the absorbent article comprising: an absorbent body arranged from the front body region to the back body region; a skin-facing side sheet arranged on the skin-facing side of the absorbent body and formed to be longer than the absorbent body in the longitudinal direction; and a non-skin-facing side sheet arranged on the non-skin-facing side of the absorbent body and formed to be longer than the absorbent body in the longitudinal direction and wider than the absorbent body in a width direction perpendicular to the longitudinal direction, the absorbent body being arranged on one end side in the longitudinal direction and having a first end edge extending in the width direction; and a third end edge connecting the first end edge and the second end edge closer to the center of the absorbent body than a first imaginary line extending from the first end edge and a second imaginary line extending from the second end edge, the absorbent article including an elastic member arranged on one end side in the longitudinal direction and extending in the width direction, the elastic member being adhered in a stretched state to at least one of the skin-facing side sheet or the non-skin-facing side sheet, and having a stretchable region that stretches at least one of the skin-facing side sheet or the non-skin-facing side sheet in the width direction, the stretchable region comprising a first stretchable region arranged inside the third imaginary line extending from the third end edge, a second stretchable region arranged between the third imaginary line and the second imaginary line and having a greater degree of contraction than the first stretchable region, and a third end edge connecting the first end edge and the second end edge closer to the center of the absorbent body than a second imaginary line extending from the second end edge, the absorbent article including an elastic member arranged on one end side in the longitudinal direction and extending in the width direction, the elastic member being adhered in a stretched state to at least one of the skin-facing side sheet or the non-skin-facing side sheet ... and having a stretchable region that stretches in the width direction and a third stretchable region that has a greater degree of contraction than the first stretchable region.

[0009] In the absorbent article, the first elasticized region, the second elasticized region and the third elasticized region may be arranged closer to the end in the longitudinal direction than the first end side.

[0010] In the above-mentioned absorbent article, a first elastic member may be arranged on the end side of the third end edge in the width direction and extend in the width direction, the first elastic member being adhered to the non-skin-facing side sheet in a stretched state, and the article may be provided with a first stretchable portion that stretches at least the non-skin-facing side sheet in the width direction.

[0011] In the absorbent article, the first elastic member may extend to the vicinity of the third end side.

[0012] In the absorbent article, the first stretchable section may have a greater degree of contraction than the second stretchable region.

[0013] The absorbent article comprises a pair of side flap portions that are arranged in the rear body region and extend outward in the width direction beyond the absorbent body, and tapes that are connected to each of the pair of side flap portions and are attached to the front body region to secure the absorbent article to the wearer's waist, and the one end side in the longitudinal direction may be on the rear body region side. [Effects of the Invention]

[0014] According to the present invention, it is possible to improve the wearing comfort while suppressing liquid leakage. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a diaper according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the diaper according to the first embodiment. [Figure 3] FIG. 3 is a cross-sectional view of the diaper according to the first embodiment in an unworn state, taken along the width direction at the center in the longitudinal direction. [Figure 4] FIG. 4 is a plan view of the diaper according to the first embodiment in a stretched state, as viewed from the skin-facing side. [Figure 5] FIG. 5 is an enlarged view of the rear body region side of the absorbent core of the diaper according to the first embodiment. [Figure 6]FIG. 6 is a plan view of the diaper according to the second embodiment in a stretched state, as viewed from the skin-facing side. [Figure 7] FIG. 7 is an enlarged view of the rear body region of the diaper according to the second embodiment in a stretched state. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

[0017] <Embodiment 1> In this embodiment, the longitudinal direction of a tape-type disposable diaper (an example of the "absorbent article" referred to in the present application, hereinafter simply referred to as "diaper") is defined as the direction connecting the front body portion arranged opposite the wearer's abdomen and the rear body portion arranged opposite the wearer's back. Between the front body portion (one side in the longitudinal direction) and the rear body portion (the other side in the longitudinal direction) (the center in the longitudinal direction) is located the crotch portion arranged between the wearer's crotch (facing the crotch). Furthermore, when the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the side facing the worn state) is defined as the direction connecting the front body portion arranged opposite the wearer's abdomen and the rear body portion arranged opposite the wearer's back. The side opposite the skin-facing side (the inside when worn) is the skin-facing side, and the side opposite the skin-facing side (the outside when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. In addition, the view from the thickness direction is referred to as the planar view.

[0018] FIG. 1 is a perspective view of a diaper according to this embodiment. The diaper 1 has a crotch region 1B, which corresponds to the crotch area covering the wearer's genitals when worn; a front body region 1F, which is located in front of the crotch region 1B and corresponds to the wearer's front body; and a back body region 1R, which is located behind the crotch region 1B and corresponds to the wearer's back body. Tapes 2L and 2R are attached to the left and right edges of the back body region 1R, and can be attached to front patches 2F, which are attached to the face of the front body region 1F facing away from the wearer. When the tapes 2L and 2R are attached to the front patches 2F with the front body region 1F positioned on the wearer's ventral side and the back body region 1R positioned on the wearer's dorsal side, the diaper 1 is secured to the wearer's body so as to encircle the wearer's abdominal circumference and thighs. Because the diaper 1 is secured to the wearer's body in this manner, the wearer can stand and walk around while wearing the diaper 1.

[0019] The diaper 1 has an absorbent body, capable of absorbing and retaining liquid, mainly located near the crotch region 1B. To prevent gaps from forming between the diaper 1 and the wearer's skin that could serve as a liquid leakage path, the diaper 1 has leg gathers 3AL, 3AR around the wearer's legs (thighs), three-dimensional gathers 3BL, 3BR located inward in the width direction of the diaper 1 from the leg gathers 3AL, 3AR, and waist gathers 3R around the wearer's abdominal circumference. The leg gathers 3AL, 3AR, three-dimensional gathers 3BL, 3BR, and waist gathers 3R adhere closely to the wearer's skin due to the elastic force of the elastic members. Therefore, liquid excreted from the wearer's genitals is absorbed by the absorbent body of the diaper 1 without leaking out. The elastic member may be selected from thread-like or strip-like rubber, etc., as appropriate.

[0020] FIG. 2 is an exploded perspective view of the diaper 1. FIG. 3 is a cross-sectional view of the diaper 1 when not being worn, taken along the widthwise centerline of the longitudinal direction. FIG. 4 is a plan view of the diaper 1 when stretched, viewed from the skin-facing side. In FIG. 4, the dashed line C1 is the centerline of the diaper 1 in the widthwise direction. Note that FIG. 4 does not show the elastic members 4C, 4SR, 4SL, 8EL, and 8ER. The diaper 1 has a cover sheet 4 that forms the outer surface of the diaper 1 when worn. The cover sheet 4 is a sheet-like member with a generally rectangular appearance, with constrictions 4KL and 4KR in the areas corresponding to the long sides, and forms the exterior surface of the diaper 1. The constrictions 4KL and 4KR are provided in the areas where the wearer's thighs are located (leg-surrounding regions 10L and 10R shown in FIG. 4). The cover sheet 4 is provided to reinforce the back sheet 5 (described later) and to improve the feel, and can be made of a nonwoven fabric made of a liquid-impermeable thermoplastic resin to prevent leakage of excrement, for example. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may also have a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0021] The diaper 1 comprises a back sheet 5 (an example of the "non-skin-facing sheet" herein), an absorbent 6C, and a top sheet 7 (an example of the "skin-facing sheet" herein), which are laminated in this order on the wearer-facing surface of the cover sheet 4. The back sheet 5, the absorbent 6C, and the top sheet 7 are all sheet-like members having a substantially rectangular appearance, and are laminated in this order on the cover sheet 4 with their longitudinal directions coinciding with the longitudinal direction of the cover sheet 4. The back sheet 5, like the cover sheet 4, is a sheet made of a liquid-impermeable thermoplastic resin material to suppress leakage of excrement. The back sheet 5 is preferably made of a material that is also moisture-permeable to prevent stuffiness when worn. The top sheet 7 is a sheet-like member that is placed on the skin-facing side of the wearer so as to cover the water-absorbing surface of the absorbent 6C. This top sheet The top sheet 7 is partially or entirely liquid-permeable. Therefore, when the diaper 1 is worn, liquid excreted by the wearer passes through the top sheet 7, which may come into contact with the wearer's skin, into the absorbent body 6C, and is absorbed therein. For example, the top sheet 7 can be made of a woven fabric, a nonwoven fabric, or a porous film. The top sheet 7 may be hydrophilic.

[0022] The back sheet 5, absorbent body 6C, and top sheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4, which is made up of the back sheet 5, absorbent body 6C, and top sheet 7 laminated together, the longitudinal ends of the back sheet 5, absorbent body 6C, and top sheet 7 are positioned on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6C from the ventral to dorsal sides. Therefore, whether the wearer is in a belly-down position or a back-down position when excreting liquid, the excreted liquid will come into contact with the absorbent body 6C via the top sheet 7.

[0023] The diaper 1 also includes elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR, which are disposed between the cover sheet 4 and the back sheet 5 so as to be stretchable in the longitudinal direction of the diaper 1. The number of elastic members 4SL, 4SR (three in this embodiment) is determined based on the elastic force (contractile force) required for the design of the diaper 1. As shown in FIG. 4, the leg gathers 3AL, 3AR are disposed at both widthwise end portions of the crotch region 1B, including the leg surrounding regions 10L, 10R, which are the areas of the diaper 1 where the wearer's thighs are located. The leg surrounding regions 10L, 10R are disposed at both widthwise end portions of the crotch region 1B. The regions where the elastic members 4SL, 4SR are disposed correspond to the leg gathers 3AL, 3AR.

[0024] The diaper 1 also has long, strip-shaped side sheets 8L, 8R. The side sheets 8L, 8R are liquid-impermeable sheets provided on the long sides of the top sheet 7. Like the cover sheet 4, the side sheets 8L, 8R have constrictions 8KL, 8KR in the areas where the wearer's thighs are located (leg-surrounding regions 10L, 10R shown in FIG. 4). Elastic members 8EL, 8ER for forming the three-dimensional gathers 3BL, 3BR are arranged along the longitudinal direction of the side sheets 8L, 8R. When the diaper 1 is worn, i.e., when the diaper 1 is U-shaped in side view, the side sheets 8L, 8R are drawn longitudinally by the contractile force of the elastic members 8EL, 8ER, rising from the top sheet 7 and forming the three-dimensional gathers 3BL, 3BR that prevent liquid leakage.

[0025] The cover sheet 4 is provided with elastic members 4C, which prevent gaps from forming between the diaper 1 and the wearer's abdominal circumference, and which are located inward in the width direction of the diaper 1 from the elastic members 4SL and 4SR and along the longitudinal direction of the diaper 1. The elastic members 4C are provided in accordance with the elastic force (contractile force) required for the design of the diaper 1.

[0026] The diaper 1 also includes elastic members 9L, 9R, 12 for forming the waist gathers 3R. The elastic members 9R, 9L, 12 are located between the backsheet 5 and the topsheet 7, at positions further back than the ends of the absorbent body 6C. The elastic members 9L, 9R, 12 extend between the backsheet 5 and the topsheet 7 so that their stretch direction is the width direction of the diaper 1. Therefore, when the tapes 2L, 2R located on both sides of the elastic members 9R, 9L, 12 are attached to the front patch 2F on the abdominal side of the wearer, the elastic members 9R, 9L, 12 exert a contractile force to tightly fit the diaper 1 to the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

[0027] The absorbent body 6C is made of short fibers of cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or polyethylene, polypropylene, polyethylene terephthalate, or the like. The absorbent body 6C has a structure in which granular absorbent resin such as SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is held in the gaps between short fibers made from synthetic fibers that have been hydrophilized. Therefore, in the absorbent body 6C, the volumetric change of the absorbent resin before and after absorbing liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when viewed from the perspective of the entire absorbent body 6C, it can be said that the expansion rate of the thickness of the absorbent body 6C after absorbing liquid is not as large as the expansion rate of the absorbent resin itself.

[0028] In this embodiment, SAP particles refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein encompasses both a composition consisting solely of SAP and a composition containing SAP as the main component and containing other substances to the extent that they do not adversely affect the water absorption properties. Examples of "other substances" include additives (such as surface modifiers added to hydrophobize the particle surface) and unreacted monomers remaining during the synthesis of SAP.

[0029] 4, the diaper 1 also includes a pair of side flaps 11L, 11R located in the rear body region 1R and extending outward in the width direction of the diaper 1 beyond the absorbent body 6C. In this embodiment, the side flaps 11L, 11R are configured to include a cover sheet 4 forming the exterior surface of the diaper 1 and side sheets 8L, 8R joined to the skin-facing side of the cover sheet 4 to form three-dimensional gathers 3BL, 3BR. The diaper 1 also includes tapes 2L, 2R connected to the pair of side flaps 11L, 11R, respectively, and attached to a front patch 2F located in the front body region 1F to secure the diaper 1 around the wearer's waist.

[0030] As shown in FIG. 4, the absorbent body 6C is disposed from the front body region 1F to the back body region 1R. The top sheet 7, which is disposed on the skin-facing side of the absorbent body 6C, is longer in the longitudinal direction of the diaper 1 than the absorbent body 6C. The back sheet 5, which is disposed on the non-skin-facing side of the absorbent body 6C, is longer in the longitudinal direction of the diaper 1 than the absorbent body 6C and wider in the width direction of the diaper 1 than the absorbent body 6C. Both longitudinal ends of the top sheet 7 and the back sheet 5 coincide with both longitudinal ends of the diaper 1. Although the top sheet 7 is wider in the width direction of the diaper 1 than the absorbent body 6C, the top sheet 7 may be formed with the same width as the absorbent body 6C and positioned so that its widthwise ends coincide with the widthwise ends of the absorbent body 6C. In this case, it is sufficient that each widthwise end of the top sheet 7 is joined to the side sheets 8L, 8R.

[0031] Here, the end portion of the absorbent 6C on the rear body region 1R side will be described in detail with reference to Figure 5. Figure 5 is an enlarged view of the rear body region 1R side of the absorbent 6C as seen from the skin-facing side. The absorbent 6C is located on the rear body region 1R side in the longitudinal direction of the diaper 1 (an example of the "one end side" referred to herein) and has a first end edge 6CE extending in the width direction of the diaper 1. The first end edge 6CE is the end edge of the absorbent 6C on the rear body region 1R side. The absorbent 6C also has a pair of second end edges 6CL, 6CR located on both widthwise outer sides of the first end edge 6CE of the diaper 1 and extending in the longitudinal direction of the diaper 1. The second end edges 6CL, 6CR define the widthwise end portions of the absorbent 6C on the rear body region 1R side. The absorbent body 6C has a gourd-like shape in a plan view, with the longitudinal center portion recessed toward the widthwise center, and the second end edges 6CL, 6CR are formed in a generally straight line on the widthwise outer side of the recessed portion. The absorbent body 6C may have a rectangular shape with the second end edges 6CL, 6CR as the long sides. The absorbent body 6C also has third end edges 6CNL, 6CNR that connect the first end edge 6CE and the second end edges 6CL, 6CR closer to the center of the absorbent body 6C than a first imaginary line 6VE extending from the first end edge 6CE and second imaginary lines 6VL, 6VR extending from the second end edges 6CL, 6CR. The first end edge 6CE, the second end edges 6CL, 6CR, and the third end edges 6CNL, 6CNR form an absorbent body on the back body region 1R side. The contour of the body 6C is defined. In this embodiment, the third end sides 6CNL and 6CNR are formed in a straight line, but may be formed in a curved line.

[0032] Next, returning to Fig. 4, the rear body region 1R side of the diaper 1 will be described in more detail. The diaper 1 has first elasticized portions 20L, 20R, each of which includes first elastic members 9L, 9R located at the widthwise end portions of the third end edges 6CNL, 6CNR of the diaper 1 and extending in the width direction. The first elastic members 9L, 9R are located between the backsheet 5 and the topsheet 7 and the sidesheets 8L, 8R, and are bonded in a stretched state to at least the backsheet 5. This allows the first elasticized portions 20L, 20R to stretch at least the backsheet 5 in the width direction of the diaper 1. In this embodiment, since the topsheet 7 and the sidesheets 8L, 8R are bonded to the backsheet 5, the topsheet 7 and the sidesheets 8L, 8R are stretched and contracted by the first elasticized portions 20L, 20R, along with the backsheet 5. In this embodiment, the first elastic members 9L, 9R are strip-shaped (sheet-shaped), and extend to the vicinity of the third end sides 6CNL, 6CLR. The first elastic members 9L, 9R may be made of multiple rubber threads.

[0033] In the diaper 1 according to this embodiment, the waist gather 3R includes first stretchable portions 20L, 20R. The first stretchable portions 20L, 20R are located in areas corresponding to the vicinity of the ilium, where the radius of curvature of the wearer's waist is greatest. Therefore, the first stretchable portions 20L, 20R allow the diaper 1 according to this embodiment to closely fit the wearer's waist in the vicinity of the ilium, thereby preventing gaps from forming between the diaper 1 and the wearer's abdominal circumference and suppressing fluid leakage. The first stretchable portions 20L, 20R also include first elastic members 9L, 9R located on the widthwise end sides of the absorbent body 6C of the third end edges 6CNL, 6CNR. The third end edges 6CNL, 6CNR are located closer to the center of the absorbent body 6C to avoid being affected by the stretching caused by the first stretchable portions 20L, 20R. As a result, the diaper 1 according to this embodiment can position the ends of the absorber 6C so that they are not affected by the stretching of the first stretchable portions 20L, 20R, thereby preventing the ends of the absorber 6C from shrinking and preventing the ends of the absorber 6C from becoming hard due to shrinkage, thereby improving the wearing comfort. In this way, the diaper 1 according to this embodiment can improve the wearing comfort while suppressing liquid leakage.

[0034] The diaper 1 according to this embodiment also includes a second elasticized portion 21 including a second elastic member 12 that is disposed closer to the rear body region 1R than the first end edge 6CE of the absorber 6C and extends in the width direction of the diaper 1. The second elastic member 12 is disposed between the backsheet 5 and the topsheet 7 and is adhered in a stretched state to at least the backsheet 5. This allows the second elasticized portion 21 to stretch the backsheet 5 in the width direction of the diaper 1. In this embodiment, since the topsheet 7 is joined to the backsheet 5, the topsheet 7 as well as the backsheet 5 are stretched by the second elasticized portion 21. In this embodiment, a sheet-like (strip-like) second elastic member 12 is used. The second elastic member 12 may be formed of a plurality of rubber threads (for example, two threads).

[0035] In the diaper 1 according to this embodiment, the waist gather 3R includes a second stretchable section 21. The second stretchable section 21 is located in a region corresponding to the back side of the wearer's waist. Therefore, the second stretchable section 21 allows the diaper 1 according to this embodiment to fit closely to the back side of the wearer's waist, thereby preventing gaps from forming between the diaper 1 and the wearer's abdominal circumference and suppressing liquid leakage.

[0036] In the diaper 1 according to this embodiment, the first elastic portions 20L, 20R have a greater elastic force than the second elastic portion 21. The elastic force can be adjusted by the thickness, extension ratio, and number of the first elastic members 9L, 9R and the second elastic members 12. In this embodiment, the first elastic members 9L, 9R and the second elastic members 12 are made of the same sheet-like material. When rubber threads are used for the members 9L, 9R and the second elastic member 12, the stretching force can be adjusted by changing the number of rubber threads.

[0037] Furthermore, in the diaper 1 according to this embodiment, the first stretchable portions 20L, 20R are longer in the longitudinal direction of the diaper 1 than the second stretchable portion 21. Here, the length of each stretchable portion in the longitudinal direction of the diaper 1 refers to the length of the area in which each elastic member is arranged in the longitudinal direction. When the same rubber thread is used for the first elastic members 9L, 9R and the second elastic members 12, the rubber threads are arranged parallel to each other at a predetermined interval, which means that the first stretchable portions 20L, 20R have a greater number of rubber threads than the second stretchable portion 21.

[0038] The second stretchable portion 21 is disposed at a predetermined distance from the first end side 6CE of the absorber 6C, thereby preventing the stretching of the second stretchable portion 21 from affecting the absorber 6C and preventing the absorber 6C from stretching in the width direction of the diaper 1.

[0039] <Embodiment 2> Next, a diaper 1 according to a second embodiment will be described. Components identical to those of the diaper 1 according to the above-described embodiment will be assigned the same reference numerals and will not be described again. Fig. 6 is a plan view of the diaper 1 in a stretched state, as viewed from the skin-facing side. Fig. 7 is an enlarged view of the rear body region 1R side of Fig. 6. Elastic members 4C, 4SR, 4SL, 8EL, and 8ER are not shown in Figs. 6 and 7.

[0040] The diaper 1 according to this embodiment includes a stretchable region 23 including elastic members 22 arranged in the rear body region 1R and extending in the width direction of the diaper 1. The elastic members 22 are arranged between the backsheet 5 and the topsheet 7 and are adhered in a stretched state to at least the backsheet 5. This allows the stretchable region 22 to stretch the backsheet 5 in the width direction of the diaper 1. In this embodiment, since the topsheet 7 is joined to the backsheet 5, the topsheet 7 as well as the backsheet 5 are included in the stretchable region 23. The elastic members 22 may be joined to at least either the backsheet 5 or the topsheet 7. In this embodiment, the elastic members 22 are made of a plurality of rubber threads (for example, two). The elastic members 22 may also be sheet-shaped (strip-shaped).

[0041] 7, the elasticized region 23 includes a first elasticized region 23A located inside third imaginary lines 6CL, 6CR extending from the third end edges 6CNL, 6CNR, a second elasticized region 23B located between the third imaginary lines 6CL, 6CR and the second imaginary lines 6VL, 6VR, and a third elasticized region 23C located widthwise outboard of the second imaginary lines VL, VR. In this embodiment, the elastic members 22 of the elasticized region 23 extend in the width direction of the diaper 1 across the first elasticized region 23A, the second elasticized region 23B, and the third elasticized region 23C. Instead of the elastic members 22 spanning the first elasticized region 23A, the second elasticized region 23B, and the third elasticized region 23C, the elasticized region 23 may include elastic members extending across each of the first elasticized region 23A, the second elasticized region 23B, and the third elasticized region 23C.

[0042] The first elasticized region 23A is positioned between the third imaginary lines 6CL, 6CR, and is affected by the absorbent body 6C, which has higher rigidity than the top sheet 7 and back sheet 5, when it elasticates, so it hardly contracts compared to the second elasticized region 23B and the third elasticized region 23C. The contraction rate of the first elasticized region 23A is about 90%, which is lower than that of the second elasticized region 23B. The contraction rate of each elasticized region is calculated by dividing the length of each elasticized region in its natural state (contracted state) by the length of the stretched state and multiplying the result by 100, and is expressed as a percentage.

[0043] The second elastic region 23B has a greater degree of contraction than the first elastic region 23A, and the degree of contraction is 70 %. The second elasticized region 23B is adjacent to the first elasticized region 23A in the width direction of the diaper, and therefore contracts while being pulled toward the widthwise center of the diaper 1. Furthermore, since the absorber 6 is not disposed in the elasticized region 23, the elasticized region 23 is composed of the top sheet 7, back sheet 5, and elastic members 22, which have lower rigidity than the absorber 6C, and therefore form a recess on the inner side of the elasticized region 23 in the longitudinal direction of the diaper 1. Furthermore, the distance between the first elasticized region 23A (the elastic member on the crotch region 1B side of the first elasticized region 23A) and the first edge 6CE of the absorber 6C is at least 10 mm, and preferably approximately 15 to 20 mm.

[0044] As described above, the second elasticized region 23B has a certain degree of contraction, and therefore rises higher than the absorbent body 6C toward the skin side, forming a recess on the longitudinally inner side of the elasticized region 23. Here, since both the first elasticized region 23A and the second elasticized region 23B are located a sufficient distance (10 mm or more) from the absorbent body 6C, and the difference in contraction between the first elasticized region 23A and the second elasticized region 23B is only about 20%, contraction of the first elasticized region 23A and the second elasticized region 23B does not bend the absorbent body 6C.

[0045] The third elasticized region 23C is located on the outer side of the absorbent body's widthwise edge when viewed in the width direction of the diaper 1, and therefore has a high degree of shrinkage, for example, of about 60%. Furthermore, when the diaper 1 is worn, the third elasticized region 23C adheres closely to the wearer's skin from the back to the sides of the abdomen so that no gap is formed between the diaper 1 and the skin. As a result, the third elasticized region 23C serves as a starting point for raising the walls of the recesses formed inside the first elasticized region 23A and the second elasticized region 23B toward the non-skin-facing side.

[0046] In the diaper 1 according to this embodiment, the first stretchable portions 20L, 20R are disposed inward of the third stretchable region 23C in the longitudinal direction of the diaper 1. In this embodiment, the first elastic members 9L, 9R of the first stretchable portions 20L, 20R are made of a plurality of (e.g., six) rubber threads. When viewed in the longitudinal direction of the diaper 1, the first stretchable portions 20L, 20R extend from inside the third stretchable region 23C to the inner ends of the third edges 6CNL, 6CNR. The first stretchable portions 20L, 20R have a greater degree of contraction than the second stretchable region 23B, and contraction of the first stretchable portions 20L, 20R allows the first stretchable portions 20L, 20R to surround, from the widthwise outer side, a recess formed on the inner side of the stretchable region 23 in the longitudinal direction of the diaper 1. The diaper 1 according to this embodiment can contain within these recesses water or watery feces that have seeped out from the edge of the absorbent body 6C or that have flowed down the top sheet 5, thereby preventing leakage of such liquid to the outside. This allows the diaper 1 according to this embodiment to improve wearing comfort while preventing liquid leakage.

[0047] <Other embodiments> Next, other embodiments will be described. In the diaper 1 according to the above embodiment, the side flaps 11L, 11R are disposed in the rear body region 1R, and the tapes 2L, 2R connected to the side flaps 11L, 11R are attached to the front body region 1F to be secured around the wearer's waist. However, the diaper 1 is not limited to this. For example, the diaper 1 may be configured such that the side flaps 11L, 11R are disposed in the rear body region 1R, and the tapes 2L, 2R connected to the side flaps 11L, 11R are attached to the rear body region 1R to be secured around the wearer's waist. In this configuration, the first end edge 6CE, second end edges 6CL, 6CR, third end edges 6CNL, 6CNR, first stretchable portions 20L, 20R, second stretchable portion 21, and stretchable region 23 of the absorbent body 6C are disposed on the front body region 1F side of the diaper 1. [Explanation of symbols]

[0048] 1. Diapers 1B...Inseam area 1F: Front body area 1R: Back area 2F Front patch 2L, 2R Tape 3BL, 3BR: 3D gathers 3R Waist Gather 4. Cover sheet 4KL, 4KR... Constriction 4C, 4SL, 4SR, 8EL, 8ER Elastic member 5. Back seat 6C··Absorbent 6CE·First edge 6CL,6CR··Second edge 6CNL,6CNR··Third edge 7. Top sheet 8. Side seat 9L, 9R: First elastic member 10L, 10R: Leg area 11L, 11R Side flap section 12. Second elastic member 20L,20R··First telescopic part 21...Second telescopic part 22 Elastic member 23...stretch area

Claims

1. An absorbent article having a front body region located on the abdomen side of a wearer when worn, a crotch region located between the crotch of the wearer, and a back body region located on the back side, arranged in this order in the longitudinal direction, an absorbent body disposed across the front body region and the back body region; a skin-facing sheet disposed on the skin-facing side of the absorbent body and formed longer in the longitudinal direction than the absorbent body; a non-skin-facing sheet disposed on the non-skin-facing side of the absorbent body, the non-skin-facing sheet being longer than the absorbent body in the longitudinal direction and wider than the absorbent body in a width direction perpendicular to the longitudinal direction; Equipped with The absorbent body is a first end side disposed on one end side in the longitudinal direction and extending in the width direction; a pair of second end sides disposed on both outer sides of the first end side in the width direction and extending in the longitudinal direction; a third edge connecting the first edge and the second edge at a position closer to the center of the absorbent body than a first virtual line extending from the first edge and a second virtual line extending from the second edge; and The absorbent article includes an elastic member that is arranged at the one end side in the longitudinal direction and extends in the width direction, the elastic member being adhered in a stretched state to at least one of the skin-facing side sheet or the non-skin-facing side sheet, and has an elastic region that stretches at least one of the skin-facing side sheet or the non-skin-facing side sheet in the width direction, The elastic region is a first stretchable region disposed inside a third virtual line extending from the third end edge; a second elastic region disposed between the third virtual line and the second virtual line, the second elastic region having a greater degree of contraction than the first elastic region; a third elastic region disposed on the outer side of the second virtual line in the width direction and having a greater degree of contraction than the second elastic region; and The elastic member is disposed only on the inner side in the longitudinal direction of an intersection of the two third virtual lines. Absorbent articles.

2. The first elastic region, the second elastic region, and the third elastic region are disposed closer to the end in the longitudinal direction than the first end side. The absorbent article of claim 1.

3. a first elastic member disposed on an end side of the third end edge in the width direction and extending in the width direction, the first elastic member being adhered to the non-skin-facing side sheet in a stretched state, and including a first stretchable portion that stretches at least the non-skin-facing side sheet in the width direction; The absorbent article according to claim 1 or 2.

4. The first elastic member extends to the vicinity of the third end side. The absorbent article of claim 3.

5. The first elastic region has a greater degree of contraction than the second elastic region. The absorbent article according to claim 3 or 4.

6. a pair of side flap portions disposed in the rear body region and extending outward in the width direction beyond the absorbent body; a tape connected to each of the pair of side flap portions and attached to the front body region to secure the absorbent article around the waist of the wearer; Equipped with The one end side in the longitudinal direction is the back body region side. The absorbent article according to any one of claims 1 to 5.

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