Absorbent article

Abstract

To prevent a longitudinal end part of a main body part of an absorbent article from being turned up from an exterior article and to prevent erection of a side sheet from being hindered by a fastening member.SOLUTION: The first region 221 of the absorbent body is positioned at the center portion in the width direction at the end portion 205 in the longitudinal direction of the main body portion. The pair of second regions 222 are located on both sides of the first region 221 in the width direction at the end portion 205 in the longitudinal direction of the main body portion. The rigidity of the pair of second regions 222 is lower than that of the first region 221. In the absorbent article, in the end portion 205 in the longitudinal direction of the main body portion, the fastening member 5 is disposed between the pair of second regions 222 and overlaps only the first region 221. In the longitudinal end portion 205 of the main body portion, the fixing region inner edge which is the inner edge in the width direction of the region joined to the main body portion of the side wall base portion of the pair of side sheets overlaps only the pair of second regions 222.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an absorbent article that is attached to the wearer side of an outer article worn by a wearer and receives excrement from the wearer. [Background technology]

[0002] Conventionally, absorbent articles such as absorbent pads for light incontinence have been used by attaching them to the inside of outer articles such as disposable diapers, underwear, etc. When attaching the absorbent article to an outer article, a fastening member such as a hook-and-loop fastener provided on the outer surface of the absorbent article is usually fastened to the inside of the outer article.

[0003] For example, in the absorbent article of Patent Document 1, a fastening member is provided in the longitudinal central region of the main body portion. The fastening member is provided only in the longitudinal central region of the main body portion, and not in any other region. This makes it possible to prevent the fastening member from getting caught on or sticking to the outer garment when the absorbent article is attached to the inside of the outer garment.

[0004] Furthermore, in Patent Document 2, fastening members are provided at both longitudinal ends of the inner pad, and the fastening members are arranged so that the longitudinal edge of the absorbent body of the inner pad coincides with the edge of the fastening member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2024-048489 [Patent Document 2] Japanese Patent Publication No. 2023-044538 Summary of the Invention [Problem to be solved by the invention]

[0006] In the absorbent article of Patent Document 1, the longitudinal ends of the absorbent article are not fastened to the outer garment, and are therefore relatively susceptible to deformation. Therefore, when a wearer of the outer garment to which the absorbent article is attached walks or turns over in bed, the aforementioned ends of the absorbent article may twist or curl and be turned up from the outer garment. Absorbent articles include, for example, absorbent pads for light incontinence with a longitudinal length of approximately 15 cm to 30 cm, as well as medium-sized absorbent pads and large absorbent pads with a longitudinal length of approximately 50 cm to 70 cm that can accommodate multiple urinations. As absorbent pads become larger and the number of absorbent layers increases, some wearers and caregivers find it difficult to stably attach the absorbent pad in the appropriate position inside the outer garment in response to the wearer's body movements.

[0007] Furthermore, in the inner pad of Patent Document 2, due to manufacturing errors or the like, the edge of the absorbent body and the edge of the fastening member may not coincide, and the fastening member may be positioned so as to protrude beyond the edge of the absorbent body. In this case, the fastening member is easily deformed by the wearer's movements, etc., and the fastening member may peel off from the outer article, causing the longitudinal end of the absorbent article to turn up from the outer article. Furthermore, in this inner pad, a pair of side sheets standing on both widthwise sides overlaps with the fastening member, which has a relatively high rigidity, and therefore there is a risk that the standing of the side sheets may be hindered by the fastening member.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to prevent the longitudinal ends of the main body of the absorbent article from being turned up from the outer article, and to prevent the fastening member from hindering the standing of the side sheets. [Means for solving the problem]

[0009] A first aspect of the present invention is an absorbent article that is attached to the wearer side of an outer garment worn by a wearer and receives excrement from the wearer, and includes a main body portion, a pair of side sheets provided on both widthwise sides of the main body portion and standing toward the wearer when worn, and a fastening member provided on the longitudinal end of the main body portion on the surface opposite the wearer side and capable of being fastened to the outer garment. The main body portion includes a liquid-permeable top sheet, a liquid-repellent and / or liquid-impermeable back sheet, and an absorbent core disposed between the top sheet and the back sheet and having a length in the longitudinal direction of the main body portion. Each of the pair of side sheets includes a side wall base portion fixed to a side portion on the wearer-facing surface of the main body portion, and a side wall upright portion that is folded from the side wall base portion at a side wall fold line extending in the longitudinal direction and stands toward the wearer when worn. The absorbent body includes a first region located in the widthwise center of the longitudinal end portion of the main body portion, and a pair of second regions located on both sides of the first region in the widthwise direction at the longitudinal end portion of the main body portion and having lower rigidity than the first region. At the longitudinal end portion of the main body portion, the fastening member is disposed between the pair of second regions and overlaps only with the first region. At the longitudinal end portion of the main body portion, inner edges of fixed regions, which are inner edges in the widthwise direction of regions of the side wall bases of the pair of side sheets that are joined to the main body portion, overlap only with the pair of second regions.

[0010] Aspect 2 of the present invention is an absorbent article of aspect 1, wherein the fastening member has a longitudinal direction in the width direction of the main body portion, and the length of the longitudinal direction of the fastening member is 80% or more of the width of the first region in the width direction.

[0011] A third aspect of the present invention is the absorbent article of the first or second aspect, wherein the absorber comprises a first absorbent core and a second absorbent core disposed between the first absorbent core and the backsheet and having a width in the width direction at the longitudinal end of the main body portion smaller than that of the first absorbent core. At the longitudinal end of the main body portion, the first region is a region where the first absorbent core and the second absorbent core overlap. At the longitudinal end of the main body portion, the pair of second regions are a pair of regions located on both sides of the second absorbent core in the width direction and outboard of the second absorbent core in the width direction.

[0012] Aspect 4 of the present invention is an absorbent article according to aspect 1 or 2 (or any one of aspects 1 to 3), wherein at the longitudinal end of the main body portion, the longitudinal distance between one end edge of the absorbent body in the longitudinal direction and a first end edge of the fastening member in the longitudinal direction is 5 mm or more and 20 mm or less.

[0013] Aspect 5 of the present invention is an absorbent article according to aspect 1 or 2 (or any one of aspects 1 to 4), wherein at the position where the fastening member is arranged in the longitudinal direction, the width of the absorbent body in the width direction is 1.2 times or more the width of the first region in the width direction.

[0014] A sixth aspect of the present invention is the absorbent article of the first or second aspect (or any one of the first to fifth aspects), wherein the absorber comprises an absorbent sheet and a bulky absorbent core that is disposed between the absorbent sheet and the back sheet and is thicker than the absorbent sheet. The absorbent sheet comprises a liquid-permeable lower sheet, a liquid-permeable upper sheet laminated on the lower sheet, and a granular and / or fibrous absorbent resin fixed between the lower sheet and the upper sheet. The region of the absorbent sheet where the absorbent resin is disposed has a longitudinal direction in the longitudinal direction of the main body portion. At the longitudinal end portion of the main body portion, the width in a width direction perpendicular to the longitudinal direction of the region of the absorbent sheet where the absorbent resin is disposed is equal to or less than the width in the width direction of the first region. The fastening member has a longitudinal direction in the width direction of the main body portion. At the longitudinal end portion of the main body portion, the longitudinal length of the fastening member is equal to or less than the width in the width direction of the region of the absorbent sheet where the absorbent resin is disposed.

[0015] A seventh aspect of the present invention is the absorbent article of the first or second aspect (or any one of the first to sixth aspects), wherein the fastening member comprises a base sheet and a plurality of hook elements standing on the base sheet. Each of the plurality of hook elements comprises a columnar stem standing on the base sheet and a head provided at the tip of the stem and having a minor axis and a major axis in plan view. The fastening member has a longitudinal direction in the width direction of the main body. The major axis of the head of each hook element is parallel to the longitudinal direction of the fastening member.

[0016] Aspect 8 of the present invention is the absorbent article of aspect 7, wherein the upper surface of the head has projections and recesses. [Effects of the Invention]

[0017] In the embodiment of the present invention, it is possible to prevent the longitudinal ends of the main body of the absorbent article from being turned up from the outer article, and also to prevent the fastening members from interfering with the standing of the side sheets. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a plan view of an absorbent article according to one embodiment, viewed from the top sheet side. [Figure 2] 2 is a cross-sectional view of the absorbent article shown in FIG. 1 taken along line II-II. [Figure 3] 3 is a cross-sectional view of the absorbent article shown in FIG. 1 taken along the line III-III. [Figure 4] FIG. 2 is a plan view showing an example of an absorbent body. [Figure 5] FIG. 2 is a plan view showing an example of an absorbent sheet. [Figure 6] FIG. 2 is a plan view showing an example of an absorbent core. [Figure 7] FIG. 1 is a plan view showing an example of an absorbent article. [Figure 8] FIG. [Figure 9] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] The configuration of an absorbent article according to an embodiment of the present invention will be described with reference to the drawings. Note that the embodiments shown in the drawings are merely examples, and the present invention is not limited to the embodiments shown in the drawings.

[0020] Fig. 1 is a plan view of an absorbent article 1 according to one embodiment of the present invention, unfolded before use and viewed from the top sheet 21 side. The absorbent article 1 is an auxiliary absorbent device that is attached to the inside (i.e., the wearer side) of an outer article such as a disposable diaper worn by a wearer and receives excrement from the wearer. The absorbent article 1 is, for example, an absorbent pad for light incontinence that receives urine and the like from the wearer. In Fig. 1, the absorbent article 1 is drawn in a stretched state when not worn, with the side that comes into contact with the wearer when worn facing forward.

[0021] When describing each component of an absorbent article according to an embodiment of the present invention, the side closest to the wearer when worn may be referred to as the skin-facing side, and the opposite side may be referred to as the non-skin-facing side. Furthermore, the numerical ranges of the dimensions of the components described in the embodiments are those measured in a dry state before wearing.

[0022] In the following description, the up-down direction and left-right direction in FIG. 1 are also referred to as the "longitudinal direction" and "width direction," respectively. The direction perpendicular to the plane of FIG. 1 is also referred to as the "thickness direction." The longitudinal direction, width direction, and thickness direction are perpendicular to one another. The absorbent article 1 shown in FIG. 1 is in a stretched state in the longitudinal and width directions. The length of the absorbent article 1 in the longitudinal direction is, for example, approximately 500 mm to 700 mm. The maximum width of the absorbent article 1 in the width direction is, for example, approximately 200 mm to 400 mm. In the following description, the longitudinal direction of the absorbent article 1 is also referred to as the "front-rear direction."

[0023] Fig. 2 is a cross-sectional view of the absorbent article 1 taken along a plane perpendicular to the longitudinal direction (i.e., the vertical direction in Fig. 1) at position II-II shown in Fig. 1. Fig. 3 is a cross-sectional view of the absorbent article 1 taken along a plane perpendicular to the longitudinal direction at position III-III shown in Fig. 1. In Figs. 2 and 3, the absorbent article 1 is drawn thicker than it actually is (i.e., the ratio of thickness to width is increased) to make the drawings easier to understand. Furthermore, in Figs. 2 and 3, some components of the absorbent article 1 that are actually in contact are drawn spaced apart in the thickness direction (i.e., the vertical direction in Figs. 2 and 3).

[0024] As shown in Figures 1 to 3, the absorbent article 1 comprises a main body 2 and a pair of side sheets 3 that cover at least a portion of the main body 2 and are arranged on the skin-facing side. The pair of side sheets 3 are arranged on both widthwise sides of the main body 2 and extend in the longitudinal direction. Each side sheet 3 is provided over approximately the entire longitudinal length of the main body 2. When the absorbent article 1 is worn, each side sheet 3 is arranged so that a portion of each side sheet 3 stands up toward the wearer. In this disclosure, "approximately the entire length" means essentially the entire length and includes manufacturing errors of the absorbent article.

[0025] The upper region 201 and the lower region 203 of the main body portion 2 in FIG. 1 are regions that come into contact with the wearer's abdominal and dorsal skin, respectively, and are referred to as the "front region 201" and the "rear region 203" in the following description. Furthermore, the region 202 that is continuous with the front region 201 and the rear region 203 and faces the wearer's crotch region between the front region 201 and the rear region 203 is referred to as the "crotch region 202." In the absorbent article 1, the front region 201, the crotch region 202, and the rear region 203 are arranged in this order in the longitudinal direction in the main body portion 2. In the following description, the upper and lower sides in FIG. 1 are also referred to as the "front side" and the "rear side," respectively.

[0026] In the example shown in FIG. 1 , the width in the width direction of the front portion 201 (hereinafter simply referred to as "width") is approximately constant except for the front end portion of the main body portion 2 (i.e., the end portion of the front portion 201 opposite the crotch portion 202). At the front end portion of the main body portion 2, the width of the front portion 201 decreases slightly as it approaches the front edge of the main body portion 2. In other words, at the front portion 201, except for the front end portion of the main body portion 2, a maximum width portion where the main body portion 2 has the maximum width at the front portion 201 extends in the longitudinal direction.

[0027] Furthermore, the width of the rear portion 203 is substantially constant except for the rear end of the main body portion 2 (i.e., the end of the rear portion 203 opposite the crotch portion 202). At the rear end of the main body portion 2, the width of the rear portion 203 decreases slightly as it approaches the rear edge of the main body portion 2. In other words, in the rear portion 203, except for the rear end of the main body portion 2, a maximum width portion where the main body portion 2 has the maximum width in the rear portion 203 extends in the longitudinal direction. The width of the rear portion 203 excluding the rear end (i.e., the maximum width of the rear portion 203) is substantially the same as the width of the front portion 201 excluding the front end (i.e., the maximum width of the front portion 201). Figure 3 above is a cross-sectional view of the rear portion 203, and the cross-section of the front portion 201 is substantially similar to the cross-section of the rear portion 203 shown in Figure 3.

[0028] The width of the crotch portion 202 gradually decreases from the front portion 201 toward the rear, reaches a minimum midway between the front portion 201 and the rear portion 203, and then gradually increases toward the rear up to the rear portion 203. In other words, the shape of the main body portion 2 in a plan view is a so-called hourglass shape in which the maximum width of the front portion 201 and the maximum width of the rear portion 203 are greater than the minimum width of the crotch portion 202. In the following description, the portion of the crotch portion 202 where the width of the main body portion 2 is minimum is referred to as the "narrowest portion 204." The narrowest portion 204 is also the narrowest portion of the absorbent article. Figure 2 above is a cross-sectional view of the absorbent article 1 at the narrowest portion 204.

[0029] In the example shown in FIG. 1 , the narrowest portion 204 is a portion of the main body portion 2 that corresponds to a single point in the longitudinal direction. In other words, it is preferable that the side edges of the main body portion 2 are arc-shaped and concave inward in the width direction in the crotch portion 202, and the narrowest portion 204 is the innermost vertex of the arc-shaped side edges in the width direction. The narrowest portion 204 may have a length in the longitudinal direction. In this case, in consideration of the fit around the legs, the longitudinal length of the narrowest portion 204 is preferably greater than 0 mm and equal to or less than 5 mm, and more preferably equal to or less than 3 mm.

[0030] As shown in FIGS. 1 to 3, the main body portion 2 includes a liquid-permeable top sheet 21, a liquid-repellent and / or liquid-impermeable back sheet 23, and an absorbent body 22. The absorbent body 22 is disposed between the top sheet 21 and the back sheet 23. The absorbent body 22 is a component that extends in the longitudinal direction of the main body portion 2 (i.e., has a longitudinal direction). In FIG. 1, the outline of the absorbent body 22 is drawn with a thick dashed line to facilitate understanding of the drawing. The total length and width of the absorbent body 22 are smaller than the total length and width of the main body portion 2 (i.e., the total length and width of the back sheet 23). The back sheet 23 extends forward of the leading edge of the absorbent body 22 and rearward of the trailing edge of the absorbent body 22. The back sheet 23 also extends outward of both widthwise side edges (i.e., left and right side edges) of the absorbent body 22.

[0031] The top sheet 21 quickly captures moisture from excrement such as urine from the wearer and transfers it to the absorbent body 22. The absorbent body 22 absorbs and quickly fixes the moisture that has permeated the top sheet 21. The back sheet 23 prevents moisture from excrement that has reached the back sheet 23 from seeping out of the main body portion 2.

[0032] The longitudinal length (hereinafter also simply referred to as "length") of the main body portion 2, including the top sheet 21, absorbent body 22, and back sheet 23, is approximately the same as the length of each side sheet 3. The side edges of the main body portion 2 and the side edges of each side sheet 3 overlap in the thickness direction over approximately the entire longitudinal length. In the example shown in Figures 1 to 3, the width of the top sheet 21, which is approximately rectangular in plan view, is smaller than the width of the back sheet 23. Furthermore, the width of the top sheet 21 is larger than the width of the absorbent body 22 in the crotch region 202, and smaller than the width of the absorbent body 22 in the front region 201 and the rear region 203.

[0033] The backsheet 23 extends outward in the width direction from both side edges of the topsheet 21 and both side edges of the absorbent body 22. In other words, both side edges of the backsheet 23 extend laterally from the topsheet 21 and the absorbent body 22 without being covered by them. The outer side edges of the pair of side sheets 3 in the width direction are joined to both side edges of the backsheet 23 in the width direction. The pair of side sheets 3 are also joined to both side edges of the topsheet 21 in the width direction. The topsheet 21 and each side sheet 3 are joined to the backsheet 23 at both longitudinal edge portions of the absorbent article 1. The topsheet 21, the backsheet 23, and each side sheet 3 may be joined by various methods (for example, adhesion with a hot melt adhesive, heat fusion, or ultrasonic fusion). 2 and 3, the side edges of the top sheet 21 are joined to each side sheet 3 via a substantially strip-shaped adhesive layer 41 that extends substantially parallel to the longitudinal direction. Note that adhesives other than the adhesive layer 41 are not shown in FIGS. 2 and 3.

[0034] For example, a liquid-permeable nonwoven fabric (such as a point-bonded nonwoven fabric, an air-through nonwoven fabric, or a spun-bonded nonwoven fabric) made of hydrophobic fibers (such as polypropylene, polyethylene, polyester, polyamide, or nylon) whose surfaces have been hydrophilically treated with a surfactant is used as the top sheet 21. Alternatively, a nonwoven fabric (such as a spunlace nonwoven fabric) made of hydrophilic fibers such as cellulose, rayon, or cotton may be used as the top sheet 21.

[0035] For example, a liquid-repellent and / or liquid-impermeable nonwoven fabric or plastic film, or a laminated sheet in which such a nonwoven fabric and a plastic film are laminated, is used as the backsheet 23. The nonwoven fabric used for the backsheet 23 is, for example, a spunbond nonwoven fabric, meltblown nonwoven fabric, or SMS (spunbond-meltblown-spunbond) nonwoven fabric made of hydrophobic fibers, and is subjected to a liquid-repellent treatment as necessary. When a plastic film is used for the backsheet 23, it is preferable to use a moisture-permeable (breathable) plastic film from the viewpoint of preventing stuffiness in the absorbent article 1 and improving comfort for the wearer.

[0036] FIG. 4 is a plan view showing an example of the absorbent body 22. As shown in FIGS. 2 to 4, the absorbent body 22 includes an absorbent sheet 25 and an absorbent core 26. The absorbent sheet 25 and the absorbent core 26 are laminated in the thickness direction between the top sheet 21 and the back sheet 23. The absorbent sheet 25 is disposed between the absorbent core 26 and the top sheet 21. The absorbent sheet 25 is a sheet-like member in which an absorbent resin is fixed between multiple layers of sheet members. The absorbent core 26 is disposed between the absorbent sheet 25 and the back sheet 23. The absorbent core 26 is a bulky member formed mainly of an aggregate of bulky fibers such as fluff pulp. The thickness of the absorbent core 26 in the thickness direction (hereinafter simply referred to as "thickness") is thicker than the thickness of the absorbent sheet 25. In the example shown in FIGS. 2 and 3, the thickness of the absorbent sheet 25 is 0.5 mm to 3 mm, and the thickness of the absorbent core 26 is 2 mm to 10 mm.

[0037] 2 and 3, an upper backing 271 is sandwiched between the absorbent sheet 25 and the absorbent core 26. In other words, the absorbent sheet 25 is placed on the upper surface of the absorbent core 26 (i.e., the main surface that faces the skin when worn) via the upper backing 271. The upper backing 271 is, for example, tissue paper or nonwoven fabric. The upper backing 271 may be omitted.

[0038] The lower surface of the absorbent sheet 25 is bonded to the upper-layer backing 271 via a hot melt adhesive or the like. For example, a strip-shaped region extending in the longitudinal direction in the widthwise center of the lower surface of the absorbent sheet 25 is bonded to the upper-layer backing 271, and both widthwise ends of the lower surface of the absorbent sheet 25 are not bonded to the upper-layer backing 271. The lower surface of the upper-layer backing 271 is bonded to the upper surface of the absorbent core 26 via a hot melt adhesive or the like. The upper surface of the absorbent sheet 25 is bonded to the top sheet 21 via a hot melt adhesive or the like. It is sufficient that at least a portion of the upper surface of the absorbent sheet 25 is bonded to the top sheet 21, and another member may be interposed between the absorbent sheet 25 and the top sheet 21. At the narrowest portion 204 of the main body portion 2, at least a portion of the absorbent sheet 25 is preferably bonded to the top sheet 21 directly or via another layer.

[0039] The absorbent core 26 includes a first absorbent core 261 and a second absorbent core 262. The first absorbent core 261 and the second absorbent core 262 are each a bulky, cotton-like member formed mainly from an aggregate of bulky fibers such as fluff pulp. The first absorbent core 261 and the second absorbent core 262 are layered in the thickness direction between the absorbent sheet 25 and the back sheet 23. The first absorbent core 261 is disposed between the second absorbent core 262 and the absorbent sheet 25. The second absorbent core 262 is disposed between the first absorbent core 261 and the back sheet 23. The thickness of each of the first absorbent core 261 and the second absorbent core 262 is greater than the thickness of the absorbent sheet 25.

[0040] 2 and 3, an intermediate mount 272 is sandwiched between the first absorbent core 261 and the second absorbent core 262. In other words, the first absorbent core 261 is placed on the upper surface of the second absorbent core 262 via the intermediate mount 272. The lower surface of the first absorbent core 261 and the upper surface of the second absorbent core 262 are each bonded to the intermediate mount 272 via a hot melt adhesive or the like. The intermediate mount 272 is, for example, tissue paper or nonwoven fabric. The intermediate mount 272 may be omitted.

[0041] The first absorbent core 261 and the second absorbent core 262 may each contain an absorbent resin such as SAP (Super Absorbent Polymer) and / or SAF (Super Absorbent Fiber) in addition to the above-mentioned fiber aggregate. The first absorbent core 261 and the second absorbent core 262 are components in which SAP particles are mixed into a fiber aggregate formed from, for example, fluff pulp. The fiber aggregate may be wrapped in tissue paper, nonwoven fabric, or the like to prevent the SAP particles from falling off. In the first absorbent core 261, the basis weight of the absorbent resin is, for example, 50% or less of the basis weight of the fluff pulp that forms the fiber aggregate. Similarly, in the second absorbent core 262, the basis weight of the absorbent resin is, for example, 50% or less of the basis weight of the fluff pulp that forms the fiber aggregate. The fiber aggregates contained in the first absorbent core 261 and the second absorbent core 262 do not necessarily have to be made of fluff pulp, but may be, for example, aggregates of synthetic fibers, or aggregates of a mixture of fluff pulp and synthetic fibers.

[0042] Fig. 5 is a plan view showing an example of an absorbent sheet. Fig. 6 is a plan view showing an example of an absorbent core. In Fig. 6, the second absorbent core 262 is depicted by a thick dashed line to facilitate understanding of the drawing. In Figs. 4 to 6, a "center line 220," which is an imaginary straight line extending in the longitudinal direction at the center in the width direction of the absorbent body 22 in plan view, is depicted by a dashed line (similar to Fig. 1). In Figs. 4 to 6, the position of a fastening member 5, which will be described later, is depicted by a dashed line.

[0043] The center line 220 is also an imaginary straight line extending in the longitudinal direction at the widthwise center of the absorbent sheet 25. The center line 220 is also an imaginary straight line extending in the longitudinal direction at the widthwise center of each of the absorbent core 26, the first absorbent core 261, and the second absorbent core 262. In other words, the center line 220 is also the center line of the absorbent sheet 25, the absorbent core 26, the first absorbent core 261, and the second absorbent core 262. The absorber 22, the absorbent sheet 25, the absorbent core 26, the first absorbent core 261, and the second absorbent core 262 each have a shape that is approximately symmetrical with respect to the center line 220 in a plan view.

[0044] The absorbent sheet 25 has a generally rectangular shape in plan view, with its length greater than its width. The absorbent sheet 25 extends from the front portion 201 of the main body 2 shown in FIG. 1 , through the crotch portion 202, to the rear portion 203. The width of the absorbent sheet 25 is generally constant over substantially the entire length in the longitudinal direction, and is smaller than the width of the main body 2 over substantially the entire length in the longitudinal direction. The length of the absorbent sheet 25 is shorter than the length of the main body 2.

[0045] The absorbent core 26 extends from the front portion 201 of the main body portion 2 through the crotch portion 202 to the rear portion 203. The length of the absorbent core 26 is approximately the same as the length of the absorbent sheet 25, and both longitudinal edges of the absorbent core 26 approximately overlap both longitudinal edges of the absorbent sheet 25 in a plan view. The width of the absorbent core 26 is approximately constant in the front portion 201 and the rear portion 203. The width of the absorbent core 26 in the crotch portion 202 gradually decreases from the rear end of the front portion 201 toward the narrowest portion of the crotch portion 202, reaches a minimum at the narrowest portion between the front portion 201 and the rear portion 203, and then gradually increases toward the rear portion 203. In other words, the shape of the absorbent core 26 in a plan view is a so-called hourglass shape. The width of the absorbent core 26 is smaller than the width of the main body portion 2 over approximately the entire longitudinal length.

[0046] The width of the absorbent core 26 in the front portion 201 is approximately constant except for the region near the front edge. In the region near the front edge of the main body portion 2, the width of the absorbent core 26 decreases slightly as it approaches the front edge of the main body portion 2. The width of the absorbent core 26 in the rear portion 203 is approximately constant except for the region near the rear edge. In the region near the rear edge of the main body portion 2, the width of the absorbent core 26 decreases slightly as it approaches the rear edge of the main body portion 2. The maximum width of the absorbent core 26 in the front portion 201 is approximately the same as the maximum width of the absorbent core 26 in the rear portion 203. The maximum widths of the absorbent core 26 in the front portion 201 and the rear portion 203 may be different.

[0047] In the example shown in FIG. 6, the portion of the absorbent core 26 where the width is smallest (i.e., the narrowest portion of the absorbent core 26) is a portion of the absorbent core 26 that corresponds to a point in the crotch portion in the longitudinal direction. In other words, the side edges of the absorbent core 26 are arc-shaped and concave inward in the width direction in the crotch portion 202 (see FIG. 1), and the narrowest portion of the absorbent core 26 is preferably the innermost vertex in the width direction of the arc-shaped side edges. The narrowest portion of the absorbent core may have a length in the longitudinal direction. In this case, the length of the narrowest portion of the absorbent core is preferably greater than 0 mm and equal to or less than 5 mm, and more preferably equal to or less than 3 mm.

[0048] As shown in Fig. 4, the width of the absorbent core 26 is smaller than the width of the absorbent sheet 25 at the narrowest part 204 and in the vicinity of the narrowest part 204 of the main body portion 2. The width of the absorbent core 26 is larger than the width of the absorbent sheet 25 in the crotch portion 202, in the front portion 201, and in the rear portion 203, excluding the narrowest part 204 and in the vicinity of the narrowest part 204. In other words, the width of the absorbent sheet 25 is larger than the width of the absorbent core 26 only at the narrowest part 204 and in the vicinity of the narrowest part 204 of the main body portion 2. The longitudinal length of the part of the absorbent core 26 that is narrower than the absorbent sheet 25 is, for example, 20 mm to 50 mm, and the proportion of this length to the total length of the absorbent core 26 is, for example, 3% to 10%.

[0049] At the narrowest part 204 of the main body portion 2, the difference between the width of the absorbent sheet 25 and the width of the absorbent core 26 is preferably 5 mm or more and 15 mm or less. At the narrowest part 204 of the main body portion 2, the width of the absorbent core 26 is preferably 100 mm or more and 130 mm or less. In the example shown in FIG. 1 , the longitudinal position of the narrowest part of the absorbent core 26 is substantially the same as the longitudinal position of the narrowest part 204 of the main body portion 2. Therefore, in the region where the width of the absorbent core 26 is smaller than the width of the absorbent sheet 25, the maximum difference between the width of the absorbent sheet 25 and the width of the absorbent core 26 is preferably 5 mm or more and 15 mm or less. At the narrowest part 204 of the main body portion 2, the difference between the width of the absorbent sheet 25 and the width of the absorbent core 26 is preferably 100 mm or more and 130 mm or less. The minimum width of the absorbent core 26 is, for example, about 35% to less than about 100% of the maximum width of the absorbent core 26 in the rear portion 203, and more preferably about 35% to about 75% of the maximum width.

[0050] In the example shown in FIG. 6, the shape of the first absorbent core 261 in plan view is substantially the same as the shape of the absorbent core 26 in plan view, except that it is provided with through-holes corresponding to core groove portions 263 described below. That is, the shape of the first absorbent core 261 in plan view is what is known as an hourglass shape. The shape of the second absorbent core 262 in plan view is substantially rectangular, with the length greater than the width. The width of the second absorbent core 262 is substantially constant over substantially the entire length in the longitudinal direction. The length of the second absorbent core 262 is substantially equal to the length of the first absorbent core 261. Both longitudinal end edges of the first absorbent core 261 and both longitudinal end edges of the second absorbent core 262 substantially overlap in plan view.

[0051] The width of the second absorbent core 262 is smaller than the width of the first absorbent core 261 over substantially the entire length in the longitudinal direction. The second absorbent core 262 is covered over substantially the entire surface by the first absorbent core 261, except for portions that overlap with the through-holes of the first absorbent core 261 in a plan view. Specifically, at the narrowest portion of the absorbent core 26 in the crotch portion 202, the width of the second absorbent core 262 is slightly smaller than the width of the first absorbent core 261. Furthermore, in the front portion 201 and the rear portion 203, the first absorbent core 261 extends outward in the width direction by a relatively large amount from the second absorbent core 262 on both widthwise sides of the second absorbent core 262, and the second absorbent core 262 overlaps with the central portion of the first absorbent core 261 in the width direction.

[0052] In the following description, the region in the longitudinal end portions 205 of the main body portion 2 where the first absorbent core 261 and the second absorbent core 262 of the absorber 22 overlap in the thickness direction will also be referred to as the "first region 221." Furthermore, the region in the longitudinal end portions 205 of the main body portion 2 where only one of the first absorbent core 261 and the second absorbent core 262 is present will also be referred to as the "second region 222." In this embodiment, the second region 222 is a region where a portion of the first absorbent core 261 extends outward in the width direction from the outer widthwise edge of the second absorbent core 262 is present.

[0053] In this embodiment, the longitudinal end 205 of the main body 2 is a region from the longitudinal end edge (i.e., edge) of the main body 2 that corresponds to 25% of the entire longitudinal length of the main body 2. In other words, the end 205 of the main body 2 is a region between the longitudinal end edge of the main body 2 and a position that is separated in the longitudinal direction from the end edge by a distance that corresponds to 25% of the entire length of the main body 2. In FIG. 6, the first region 221 and the second region 222 are each indicated by being surrounded by a two-dot chain line.

[0054] In the example shown in Fig. 6, at the end portions 205 on both longitudinal sides of the main body portion 2, the first region 221 is located in the center in the width direction of the absorbent body 22. Furthermore, a pair of second regions 222 are located adjacent to each other on both widthwise sides of the first region 221 (i.e., on the outer side in the width direction of both side edges of the first region 221). The pair of second regions 222 are continuous with the first region 221 in the width direction. The pair of second regions 222 are located on both widthwise sides of the second absorbent core 262, on the outer side in the width direction of both side edges (i.e., on both widthwise edge edges) of the second absorbent core 262. In each second region 222, only the first absorbent core 261 of the absorbent core 26 is present, and the second absorbent core 262 is not present.

[0055] At each end 205 of the main body portion 2, the maximum width of the absorbent body 22 (i.e., the maximum width of the absorbent core 26) is, for example, two to three times the maximum width of the first region 221 (i.e., the width of the second absorbent core 262). In other words, at each end 205 of the main body portion 2, the maximum width of each second region 222 is, for example, 0.5 to 1 time the maximum width of the first region 221.

[0056] As described above, the second region 222 is a region where only one of the first absorbent core 261 and the second absorbent core 262 is present, and therefore has lower rigidity than the first region 221 where the first absorbent core 261 and the second absorbent core 262 overlap in the thickness direction. The rigidity of the first region 221 is preferably, for example, two to five times the rigidity of the second region 222.

[0057] The rigidity of each of the first region 221 and the second region 222 was measured as follows. First, a test piece corresponding to the first region 221 was set in a Tensilon universal testing machine (RTG-1210, manufactured by A&D Co., Ltd.) using a compression-type bending test jig (U-1026A, manufactured by Orientec Co., Ltd.). Next, an indenter was pressed into the test piece to measure the maximum point stress (MPa), and the arithmetic average of five measurement results was calculated as the rigidity of the first region 221. The rigidity of the second region 222 was calculated in the same manner. The test pieces corresponding to the first region 221 and the second region 222 were rectangular, 50 mm wide and 100 mm long. The distance between the supports when setting the test piece was 50 mm. The pressing speed of the indenter (i.e., crosshead speed) was 300 mm / min. The pressing distance of the indenter was 30 mm, with the position where it contacted the test piece being 0.

[0058] A core groove portion 263 extending in the longitudinal direction is provided on the upper surface of the absorbent core 26. The core groove portion 263 is a recess recessed downward from the upper surface of the absorbent core 26 (i.e., in the direction toward the backsheet 23). In the example shown in FIGS. 2 and 3, the core groove portion 263 does not penetrate the absorbent core 26 in the thickness direction. The core groove portion 263 is provided at approximately the center of the absorbent core 26 in the width direction. In the example shown in FIG. 6, the core groove portion 263 has a substantially strip-like shape in plan view, with its length greater than its width. The core groove portion 263 extends substantially linearly and substantially parallel to the longitudinal direction. Both ends of the core groove portion 263 in the longitudinal direction are substantially semicircular. At least a portion of the core groove portion 263 overlaps with the center line 220 in plan view. The center line 220 is located at the center of the core groove portion 263 in the width direction. In plan view, the core groove portion 263 has a shape that is substantially symmetrical with respect to the center line 220.

[0059] The core groove portion 263 extends from the front portion 201 of the main body portion 2 through the crotch portion 202 to the rear portion 203. The length of the core groove portion 263 is smaller than the length of the absorbent core 26. The front end of the core groove portion 263 is located closer to the crotch portion 202 than the front edge of the absorbent core 26, and the rear end of the core groove portion 263 is located closer to the crotch portion 202 than the rear edge of the absorbent core 26. The width of the core groove portion 263 is approximately constant over approximately the entire length in the longitudinal direction, except for both longitudinal end portions. The width of the core groove portion 263 is smaller than the width of the first absorbent core 261 and the width of the second absorbent core 262 over approximately the entire length in the longitudinal direction.

[0060] 2, a through-hole having substantially the same shape as the core groove 263 is provided in the widthwise central portion of the first absorbent core 261. The core groove 263 is formed by closing the through-hole from below (i.e., the side that faces away from the skin when worn) by the intermediate mount 272 and the second absorbent core 262. In other words, the core groove 263 penetrates the first absorbent core 261 in the thickness direction at the widthwise central portion, and overlaps with the second absorbent core 262 in plan view. In other words, the bottom surface of the core groove 263 is formed by the second absorbent core 262.

[0061] In the absorbent core 26, a recess having substantially the same shape as the through-hole in plan view may be provided on the upper surface (i.e., the main surface facing the skin when worn) of the second absorbent core 262, and the through-hole and the recess may form the core groove 263. Alternatively, the core groove 263 may penetrate the absorbent core 26 (i.e., the first absorbent core 261 and the second absorbent core 262) in the thickness direction.

[0062] As shown in FIGS. 2 and 3, the absorbent sheet 25 comprises an upper layer sheet 251, a lower layer sheet 252, and an absorbent resin 253. The upper layer sheet 251 and the lower layer sheet 252 are laminated in the thickness direction between the top sheet 21 and the absorbent core 26. The upper layer sheet 251 is disposed between the lower layer sheet 252 and the top sheet 21. The lower layer sheet 252 is disposed between the upper layer sheet 251 and the absorbent core 26. The absorbent resin 253 is fixed between the upper layer sheet 251 and the lower layer sheet 252 with a hot melt adhesive or the like. In the example shown in FIGS. 2 and 3, bulky fibers such as fluff pulp are substantially absent between the upper layer sheet 251 and the lower layer sheet 252. This achieves a thin absorbent sheet 25 with a high absorption capacity. In addition, in the absorbent sheet 25, even if a small amount of fluff pulp or the like that is unintentionally mixed in during manufacturing is present between the upper sheet 251 and the lower sheet 252, it is considered that there are substantially no bulky fibers between the upper sheet 251 and the lower sheet 252.

[0063] The upper layer sheet 251 and the lower layer sheet 252 are each a liquid-permeable sheet member. For example, a liquid-permeable nonwoven fabric (such as a spunlace nonwoven fabric, an air-through nonwoven fabric, or a spunbond nonwoven fabric) is used as the upper layer sheet 251 and the lower layer sheet 252. The upper layer sheet 251 and the lower layer sheet 252 may be the same type of nonwoven fabric or different types of nonwoven fabric. Furthermore, the upper layer sheet 251 and the lower layer sheet 252 may each be a liquid-permeable sheet member other than a nonwoven fabric (for example, a perforated plastic film).

[0064] In the example shown in Figures 2 and 3, the absorbent resin 253 is a large number of granular SAP. In Figures 2 and 3, the particles of the absorbent resin 253 are drawn larger than they actually are. The absorbent resin 253 may also be a large number of fibrous SAF, or a mixture of a large number of SAPs and SAFs. In other words, the absorbent resin 253 is granular and / or fibrous. SAPs and SAFs are highly absorbent materials that have higher absorption capacity (i.e., can absorb and hold a larger amount of liquid) than the same amount of pulp fibers, etc. The absorbent resin 253 absorbs body fluids, such as urine, that have permeated the top sheet 21 and reached the absorbent sheet 25, and swells to hold the body fluid within the absorbent sheet 25.

[0065] For example, a polyacrylic acid-based absorbent resin such as sodium polyacrylate is used as the absorbent resin 253. Alternatively, a starch-based absorbent resin such as a starch-acrylonitrile graft copolymer, a starch-acrylic acid graft copolymer, or a starch-acrylamide graft copolymer may be used as the absorbent resin 253. Alternatively, a polyvinyl alcohol-based absorbent resin such as a crosslinked polyvinyl alcohol may be used as the absorbent resin 253.

[0066] As shown in Fig. 5, the absorbent sheet 25 includes a pair of absorbent resin-containing regions 254, a central region 255, and a pair of side regions 256. In Fig. 5, the pair of absorbent resin-containing regions 254 are indicated by hatching to facilitate understanding of the drawing.

[0067] The pair of side regions 256 are side edge regions located on both ends of the absorbent sheet 25 in the width direction. Each side region 256 is a band-shaped region extending approximately parallel to the longitudinal direction over approximately the entire length of the absorbent sheet 25. The shape of the pair of side regions 256 in a plan view is approximately symmetrical with respect to the center line 220. The shape of each side region 256 in a plan view is approximately rectangular with the length greater than the width, and the width of each side region 256 is approximately constant over approximately the entire length in the longitudinal direction. The absorbent resin 253 is substantially absent in the pair of side regions 256. In other words, the pair of side regions 256 are absorbent resin-free regions. In the pair of side regions 256, the upper-layer sheet 251 and the lower-layer sheet 252 are joined to each other with a hot-melt adhesive or the like.

[0068] In the absorbent sheet 25, a region 257 between a pair of side regions 256 in the width direction is a region where the absorbent resin 253 (see FIGS. 2 and 3) can be placed, and hereinafter will also be referred to as the "absorbent resin placeable region 257." In the absorbent resin placeable region 257, the absorbent resin 253 may be placed over the entire surface, or may be placed only in a portion. In the example shown in FIG. 5, the absorbent resin placeable region 257 includes a pair of absorbent resin existing regions 254 and a central region 255.

[0069] The absorbent resin-disposable region 257 is a strip-shaped region extending substantially parallel to the longitudinal direction over substantially the entire length of the absorbent sheet 25. That is, the absorbent resin-disposable region 257 has a longitudinal direction in the longitudinal direction of the main body portion 2. The absorbent resin-disposable region 257 overlaps with the center line 220 in a planar view. The shape of the absorbent resin-disposable region 257 in a planar view is substantially symmetrical with respect to the center line 220. The shape of the absorbent resin-disposable region 257 in a planar view is substantially rectangular, with its length greater than its width. The width B1 of the absorbent resin-disposable region 257 in the width direction perpendicular to the longitudinal direction is equal to or less than the width of the first region 221 described above. In other words, the width B1 of the absorbent resin-disposable region 257 is equal to or less than the width of the second absorbent core 262.

[0070] The pair of absorbent resin-existing regions 254 are regions located on the widthwise inner side of the pair of side regions 256. Each absorbent resin-existing region 254 is continuous in the width direction with the adjacent side region 256 on the widthwise outer side. In the example shown in FIG. 5, the width of each absorbent resin-existing region 254 is approximately the same as the width of each side region 256. The pair of absorbent resin-existing regions 254 are provided with absorbent resin 253 (see FIGS. 2 and 3), and are fixed to the upper-layer sheet 251 and the lower-layer sheet 252 with a hot melt adhesive or the like.

[0071] The pair of absorbent resin-containing regions 254 are disposed at positions spaced apart on both sides of the center line 220 in the width direction, and do not overlap with the center line 220 in a plan view. Each absorbent resin-containing region 254 is a band-shaped region extending approximately parallel to the longitudinal direction over approximately the entire length of the absorbent sheet 25. The shape of the pair of absorbent resin-containing regions 254 in a plan view is approximately line-symmetrical with respect to the center line 220. The shape of each absorbent resin-containing region 254 in a plan view is approximately rectangular with the length greater than the width, and the width of each absorbent resin-containing region 254 is approximately constant over approximately the entire length in the longitudinal direction. In the example shown in FIG. 5, the width of each absorbent resin-containing region 254 is 15 mm to 25 mm, which is 10% to 20% of the width of the absorbent sheet 25.

[0072] The central region 255 is a region between the pair of absorbent resin-containing regions 254 in the width direction, and is continuous with the pair of absorbent resin-containing regions 254 in the width direction. The central region 255 is a band-shaped region extending approximately parallel to the longitudinal direction over approximately the entire length of the absorbent sheet 25. The absorbent resin 253 is substantially absent in the central region 255. In other words, the central region 255 is an absorbent resin-free region. In the central region 255, the upper-layer sheet 251 and the lower-layer sheet 252 are joined to each other with a hot-melt adhesive or the like.

[0073] The central region 255 overlaps with the center line 220 in a plan view. The shape of the central region 255 in a plan view is substantially symmetrical with respect to the center line 220. The shape of the central region 255 in a plan view is substantially rectangular with its length greater than its width, and the width of the central region 255 is substantially constant over substantially the entire length in the longitudinal direction. In the example shown in Fig. 5, the width of the central region 255 is 30 mm to 60 mm, which is 25% to 45% of the width of the absorbent sheet 25.

[0074] The central region 255 is wider than each of the pair of absorbent resin-containing regions 254. In other words, the width of the central region 255 is greater than the width of each of the absorbent resin-containing regions 254. The width of the central region 255 is, for example, two to three times the width of each of the absorbent resin-containing regions 254. This allows the absorbent article 1 provided with the absorbent sheet 25 to fit the body of the wearer more easily, resulting in a structure that makes it easier to suppress side leakage.

[0075] As shown in Fig. 4, the central region 255 of the absorbent sheet 25 overlaps with the core groove portion 263 of the absorbent core 26 in a planar view. In the absorber 22, at least a portion of the core groove portion 263 overlaps with the central region 255 of the absorbent sheet 25 in a planar view. In the example shown in Fig. 4, the length and width of the core groove portion 263 are smaller than the length and width of the central region 255 of the absorber 22, respectively, and the entire core groove portion 263 overlaps with the central region 255 in a planar view. The width of the core groove portion 263 is, for example, approximately the same as the width of each absorbent resin existing region 254.

[0076] It is preferable that the absorbent resin 253 is completely absent (i.e., strictly absent) in the central region 255 and the pair of side regions 256, but a small amount may be present so long as it can be said to be substantially absent. For example, a small amount of absorbent resin 253 that was unintentionally scattered during the manufacturing process of the absorbent sheet 25 may be present in the central region 255 and / or the pair of side regions 256.

[0077] As shown in Figures 1 to 3, the pair of side sheets 3 are disposed on the absorbent body 22 on both sides in the width direction of the absorbent body 22 and extend in the longitudinal direction. Each side sheet 3 comprises a side sheet main body 31 and an elastic member 32. The side sheet main body 31 is a substantially strip-shaped sheet member disposed on both sides in the width direction of the absorbent body 22 and extending in the longitudinal direction. The side sheet main body 31 is provided over substantially the entire length of the main body portion 2 in the longitudinal direction. The side sheet main body 31 is fixed to the side portion of the top sheet 21 via the above-mentioned adhesive layer 41. The adhesive layer 41 extends substantially parallel to the longitudinal direction over substantially the entire length of the side sheet 3.

[0078] In the stretched absorbent article 1, the side sheet main body 31 extends widthwise inward from the portion in contact with the adhesive layer 41 and is folded back widthwise outward and upward (i.e., toward the skin-facing side when worn) at a side wall fold line 39 that extends longitudinally and widthwise inward of the adhesive layer 41. In the example shown in FIGS. 2 and 3 , the side wall fold line 39 overlaps the absorbent resin-containing region 254 of the absorbent sheet 25 in a plan view. In the following description, the portion of the side sheet main body 31 on one side of the side wall fold line 39 that is fixed to the main body portion 2 by the adhesive layer 41 or the like is also referred to as the "side wall base portion 33." Furthermore, the portion of the side sheet main body 31 on the other side of the side wall fold line 39 that is not directly fixed to the main body portion 2 is also referred to as the "side wall upright portion 34." The side wall base portion 33 and the side wall upright portion 34 are continuous at the side wall fold line 39.

[0079] FIG. 7 is a plan view showing an example of an absorbent article 1, and similarly to FIG. 1, it shows the absorbent article 1 in an unfolded state. In each side sheet 3, the portion of the side wall base 33 of the side sheet main body 31 that extends widthwise outward from the side edge of the top sheet 21 (i.e., the portion widthwise outward from the portion that contacts the adhesive layer 41 (see FIGS. 2 and 3)) is joined to the left or right side in the width direction of the back sheet 23 at the narrowest portion 204, and is joined to the left or right side in the width direction of the absorbent core 26 and the left or right side in the width direction of the back sheet 23 at portions other than the narrowest portion 204. In the following description, the widthwise inner edge of the region of the side wall base 33 that contacts the adhesive layer 41 (i.e., the region directly joined to the main body portion 2) is referred to as the "fixed region inner edge 332." The side wall base 33 is fixed to the main body portion 2 only widthwise outward from the fixed region inner edge 332.

[0080] 2, 3, and 7, the fixing region inner edge 332 is located widthwise outward of the side edges of the second absorbent core 262. That is, the fixing region inner edge 332 does not overlap the second absorbent core 262 in the thickness direction, but overlaps the first absorbent core 261 in the thickness direction on the widthwise outer side of the second absorbent core 262. Therefore, at the longitudinal end 205 of the main body portion 2, the pair of fixing region inner edges 332 provided on the pair of side sheets 3 do not overlap the first region 221 (see FIG. 6) in the thickness direction, but overlap the pair of second regions 222 (see FIG. 6) on the widthwise outer side of the first region 221. That is, the side wall base 33 is fixed to the main body portion 2 widthwise outward of the boundary line between the first region 221 and the second region 222, and is not fixed to the main body portion 2 on the first region 221.

[0081] Furthermore, the fixed region inner edge 332 is located widthwise outside the absorbent resin presence region 254 that is closer to the side wall base 33. Therefore, the side wall base 33 is fixed to the main body portion 2 widthwise outside the absorbent resin presence region 254, and is not fixed to the main body portion 2 on the absorbent resin presence region 254 or on the widthwise inside of the absorbent resin presence region 254.

[0082] In FIG. 7 , the fixing regions 331, which are regions of the left and right sidewall bases 33 in the width direction that are fixed to the main body portion 2, are indicated by parallel diagonal lines. The sidewall bases 33 and the main body portion 2 are fixed to each other by, for example, adhesion with a hot melt adhesive. In the example shown in FIG. 7 , the entire region of the sidewall base 33 that is widthwise outer than the fixing region inner edge 332 is the fixing region 331 that is fixed to the main body portion 2. Note that even if there is an area of ​​the sidewall base 33 that is widthwise outer than the fixing region inner edge 332 that cannot be coated with hot melt adhesive due to manufacturing limitations, such as near the side edges of the top sheet 21, the entire region is considered to be the fixing region 331 as long as hot melt adhesive is applied to the entire region other than that area. The hot melt adhesive is applied to the fixing region 331 by, for example, curtain spray coating, stripe coating, spiral coating, omega coating, or the like.

[0083] As described above, the side wall upright portion 34 extends from the side wall fold line 39 upward toward the side wall base portion 33. The side wall upright portion 34 is overlapped on the side wall base portion 33 at both longitudinal ends and fixed to the upper surface of the side wall base 33 (i.e., the main surface that faces the skin when worn) with a hot melt adhesive or the like. In the following description, the portions of the side wall upright portion 34 that are fixed to the upper surface of the side wall base 33 at both longitudinal ends are also referred to as "end fixing portions 341." In FIG. 7, the end fixing portions 341 are indicated by hatched lines that are different from the fixing region 331. The length of the end fixing portion 341 is, for example, 5% to 20% of the length of the main body portion 2, and preferably 10% to 17%.

[0084] As shown in Figures 2 and 7, when the side wall upright portion 34 is spread widthwise outward from the side wall fold line 39, the widthwise outer edge of the side wall upright portion 34 at the narrowest part 204 of the main body portion 2 (i.e., the free end edge of the side wall upright portion 34) is positioned widthwise outer than the widthwise outer edge of the absorbent core 26 at the narrowest part 204.

[0085] The elastic members 32 extending in the longitudinal direction are joined in a stretched state to the free ends of the side wall standing portions 34 with an adhesive such as a hot melt adhesive. In the state shown in Fig. 2 (i.e., the state in which the side wall standing portions 34 are spread outward in the width direction from the side wall folding lines 39), the elastic members 32 are located outward in the width direction of the absorbent resin existing region 254 of the absorbent sheet 25 that is closer to the elastic member 32, of the pair of absorbent resin existing regions 254, and do not overlap with the absorbent resin existing region 254 in a plan view.

[0086] When the absorbent article 1 is worn, the elastic members 32 in each side sheet 3 contract, causing the side wall upright portions 34 to rise from the main body portion 2 toward the wearer in the longitudinal center of each side sheet 3. When the side wall upright portions 34 rise, the portion of the side wall base portion 33 between the side wall fold line 39 and the adhesive layer 41 also rises toward the wearer together with the side wall upright portions 34. That is, in each side sheet 3, the portion of the side sheet main body 31 excluding the fixing region 331 rises toward the wearer from the fixing region inner edge 332, which is the inner edge of the fixing region 331, to form a pair of three-dimensional gathers that come into contact with the wearer's skin. This prevents side leakage of body fluids such as urine (i.e., leakage to the sides from the absorbent article 1).

[0087] The side sheet main body 31 is made of a liquid-repellent and / or liquid-impermeable nonwoven fabric (e.g., spunbond nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric, etc.) made of hydrophobic fibers. The elastic members 32 are made of, for example, polyurethane threads, strip-shaped polyurethane films, thread-shaped or strip-shaped natural rubber, etc. In the example shown in FIG. 2, polyurethane threads are used as the elastic members 32.

[0088] As shown in Figures 1 and 3, fastening members 5 are provided on both longitudinal end portions 205 of the main body portion 2. The fastening members 5 are provided on the surface of the main body portion 2 opposite the wearer side (i.e., the side that faces away from the skin when worn), and are fixed, for example, with a hot melt adhesive to the surface of the backsheet 23. The fastening members 5 are members that can be fastened to the outer article described above. The fastening members 5 are, for example, resin hook-and-loop fasteners having a large number of hook elements. The fastening members 5 are pressed against and engaged with the inner surface of the outer article described above (i.e., the surface facing the wearer), thereby attaching the absorbent article 1 to the outer article and preventing the absorbent article 1 from shifting position relative to the outer article.

[0089] The fastening member 5 "engages" with another member means that the fastening member 5 and the other member are joined together and the relative positions therebetween are fixed. After the fastening member 5 and the other member are engaged with each other, these members can be separated.

[0090] Fig. 8 is an enlarged plan view of the fastening member 5 (viewed from the back sheet 23 side opposite to the top sheet 21 side in Fig. 1). Fig. 9 is a cross-sectional view of the fastening member 5 taken along the line IX-IX in Fig. 8. The fastening member 5 has a generally rectangular band shape extending generally parallel to the width direction in plan view. In other words, the fastening member 5 has a generally rectangular shape in which the length in the width direction is longer than the length in the longitudinal direction in plan view. That is, the fastening member 5 has a generally rectangular shape with its longitudinal direction in the width direction of the main body portion 2. The fastening member 5 has a shape that is generally symmetrical with respect to the center line 220 (see Fig. 1) in plan view.

[0091] The fastening member 5 includes a base sheet 51 and a plurality of hook elements 52. The base sheet 51 is a relatively thin sheet-like member made of resin. Each hook element 52 is a generally columnar member that stands on the base sheet 51 in the thickness direction of the absorbent article 1. In the fastening member 5, a large number of hook elements 52 of generally the same shape are arranged in a matrix on the base sheet 51. Note that, for convenience of illustration, in FIG. 8, the number of hook elements 52 is drawn smaller than in reality, and the size of the hook elements 52 is drawn larger than in reality.

[0092] Each hook element 52 includes a stem 53 and a head 54. The stem 53 is a generally columnar (e.g., generally cylindrical) portion that stands on the base sheet 51 and extends in the thickness direction. The head 54 is a generally plate-shaped portion provided at the tip of the stem 53 (i.e., the end portion farther from the base sheet 51 in the thickness direction). In the example shown in FIGS. 8 and 9, the head 54 is a generally disk-shaped portion that is generally perpendicular to the thickness direction. The head 54 has a generally elliptical or oval shape in plan view having a minor axis R1 and a major axis R2 that are perpendicular to each other. The major axis R2 of the head 54 is larger than the minor axis R1, for example, 1.1 to 1.5 times the minor axis R1. The major axis R2 of the head 54 is generally parallel to the width direction (i.e., the longitudinal direction of the fastening member 5). The major axis R2 of the head 54 is larger than the diameter of the stem 53 in plan view. The minor axis R1 of the head 54 is equal to or greater than the diameter of the stem 53.

[0093] In the absorbent article 1, the heads 54 of the numerous hook elements 52 engage with fibers, etc., of the nonwoven fabric that constitutes the inner surface of the outer article, thereby fastening the fastening member 5 to the outer article. The upper surface of the head 54 of each hook element 52 (i.e., the main surface on the side farther from the base sheet 51 in the thickness direction) is provided with unevenness. In other words, the upper surface of the head 54 of each hook element 52 is provided with a plurality of protrusions 55 that protrude toward the side farther from the base sheet 51 in the thickness direction. This more suitably achieves engagement between the heads 54 of the hook elements 52 and fibers, etc., of the nonwoven fabric that constitutes the inner surface of the outer article.

[0094] As shown in FIG. 5, at the end portions 205 on both sides in the longitudinal direction of the main body portion 2, the longitudinal length of the fastening member 5 (i.e., the length in the left-right direction) is equal to or less than the width B1 of the above-mentioned absorbent resin-applicable region 257 (i.e., the region in the absorbent sheet 25 where the absorbent resin 253 is arranged). In the example shown in FIG. 5, the longitudinal length of the fastening member 5 is smaller than the width B1 of the absorbent resin-applicable region 257 (i.e., the central region 255 and the pair of absorbent resin-existing regions 254). In addition, the longitudinal length of the fastening member 5 (i.e., the length of the fastening member 5 in the width direction of the main body portion 2) is greater than the width of the central region 255. The longitudinal length of the fastening member 5 is, for example, 15 mm to 85 mm. The length of the fastening member 5 in the width direction perpendicular to the longitudinal direction (i.e., the width in the front-rear direction) is, for example, 10 mm to 20 mm.

[0095] When paying attention to the positional relationship between the fastening member 5 and the absorbent sheet 25 in a plan view, the fastening member 5 overlaps only with the absorbent resin-containing region 257, and does not overlap with a pair of side regions 256 adjacent to both sides in the width direction of the absorbent resin-containing region 257. Furthermore, the side edges on both longitudinal sides of the fastening member 5 overlap with the pair of absorbent resin-containing regions 254, but do not overlap with the central region 255 located between the pair of absorbent resin-containing regions 254.

[0096] As shown in Fig. 6, at the end portions 205 on both sides in the longitudinal direction of the main body portion 2, the longitudinal length of the fastening member 5 is equal to or less than the width of the first region 221 (i.e., the width of the second absorbent core 262). In the example shown in Fig. 6, the longitudinal length of the fastening member 5 is smaller than the width of the first region 221. At the position where the fastening member 5 is arranged in the longitudinal direction (i.e., the central position in the longitudinal direction of the fastening member 5), the longitudinal length of the fastening member 5 is 80% or more of the width of the first region 221. Furthermore, at the position where the fastening member 5 is arranged in the longitudinal direction of the main body portion 2, the width of the absorbent body 22 (i.e., the width of the first absorbent core 261) is, for example, 1.2 times or more, and preferably 2 times or more, the width of the first region 221.

[0097] When paying attention to the positional relationship between the fastening member 5 and the absorbent core 26 in a plan view, the fastening member 5 is disposed between the pair of second regions 222 and overlaps only with the first region 221, but does not overlap with the pair of second regions 222 adjacent to both sides of the first region 221 in the width direction. In other words, the side edges on both longitudinal sides of the fastening member 5 overlap only with the first region 221, but do not overlap with the pair of second regions 222.

[0098] In the example shown in FIG. 4 , at the end portions 205 on both sides in the longitudinal direction of the main body portion 2, an edge 57 (hereinafter also referred to as the "first edge 57") of a pair of edges of the fastening member 5 in the longitudinal direction of the main body portion 2 that is farther from the crotch portion 202 is located at a position spaced apart from an edge 223 of the absorber 22 in the longitudinal direction (i.e., one of the pair of edges of the absorber 22 in the longitudinal direction that is closer to the fastening member 5). In the example shown in FIG. 4 , the one edge 223 of the absorber 22 is also one of the longitudinal edges of each of the first absorbent core 261, the second absorbent core 262, and the absorbent sheet 25 (i.e., one of the edges closer to the fastening member 5). The longitudinal distance L1 between the one edge 223 of the absorber 22 and the first edge 57 of the fastening member 5 is preferably 5 mm or more, more preferably 10 mm or more. Furthermore, the distance L1 is preferably 20 mm or less, more preferably 15 mm or less. 4 illustrates the distance L1 for the fastening member 5 arranged in the front portion 201, but the same applies to the fastening member 5 arranged in the rear portion 203. Table 1 shows the results of evaluating the absorbent article 1 by changing the distance L1.

[0099] [Table 1]

[0100] If the above-mentioned distance L1 is 0 mm, the position of the fastening member 5 in the longitudinal direction of the main body part 2 may be shifted due to manufacturing errors, etc., and the fastening member 5 may protrude from the absorbent body 22 in the longitudinal direction of the main body part 2. The part of the fastening member 5 that protrudes from the absorbent body 22 is prone to deformation, reducing the stability of fastening the absorbent article 1 to the outer article. If the distance L1 is 5 mm, although the possibility of the fastening member 5 protruding from the absorbent body 22 in the longitudinal direction of the main body part 2 due to manufacturing errors, etc. is low, the possibility of this still remains slight, so there is a possibility of reducing the stability of fastening the absorbent article 1 to the outer article.

[0101] On the other hand, when the distance L1 is 25 mm, the fastening member 5 is relatively far away from the longitudinal edge of the absorbent article 1, so that the longitudinal end of the main body 2 of the absorbent article 1 (i.e., the longitudinal end of the absorbent article 1) may be turned up from the outer garment due to the movements of the wearer of the outer garment, etc. When the distance L1 is 20 mm, there remains a slight possibility that the longitudinal end 205 of the main body 2 of the absorbent article 1 (which is also the longitudinal end 205 of the absorbent article 1) may be turned up from the outer garment due to the movements of the wearer of the outer garment, etc.

[0102] When the distance L1 is 10 mm or 15 mm, the above-mentioned absorbent article 1 is attached to the outer article with high stability, and the longitudinal end 205 of the main body 2 of the absorbent article 1 is effectively prevented from being turned up from the outer article.

[0103] From the viewpoint of suppressing deformation of the fastening member 5 due to the movements of the wearer of the outer garment, it is preferable that the edge 58 (hereinafter also referred to as the "second edge 58"), of the pair of longitudinal edges of the fastening member 5, which is closer to the crotch portion 202, is spaced apart from the crotch portion 202 in the longitudinal direction by at least a certain distance. For example, it is preferable that the second edge 58 of the fastening member 5 is spaced apart from the core groove portion 263 in the longitudinal direction. In other words, it is preferable that the fastening member 5 does not overlap with the core groove portion 263 in a plan view.

[0104] As described above, the absorbent article 1 is attached to the wearer side of an outer garment worn by the wearer and receives excrement from the wearer. The absorbent article 1 comprises a main body portion 2, a pair of side sheets 3, and a fastening member 5. The pair of side sheets 3 are provided on both widthwise sides of the main body portion 2 and stand up toward the wearer when worn. The fastening member 5 is provided on the surface of the main body portion 2 opposite the wearer side, at an end 205 in the longitudinal direction of the main body portion 2. The fastening member 5 can be fastened to the outer garment. The main body portion 2 comprises a liquid-permeable top sheet 21, a liquid-repellent and / or liquid-impermeable back sheet 23, and an absorbent body 22. The absorbent body 22 is disposed between the top sheet 21 and the back sheet 23. The absorbent body 22 has a longitudinal direction in the longitudinal direction of the main body portion 2.

[0105] Each of the pair of side sheets 3 includes a side wall base 33 and a side wall upright portion 34. The side wall upright portion 34 is fixed to the side of the main body portion 2 on the wearer's side. The side wall upright portion 34 is folded back from the side wall base 33 along a side wall fold line 39 extending in the longitudinal direction. The side wall upright portion 34 stands up toward the wearer when worn (i.e., when the absorbent article 1 is worn). The absorbent body 22 includes a first region 221 and a pair of second regions 222. The first region 221 is located in the center in the width direction at the longitudinal end portion 205 of the main body portion 2. The pair of second regions 222 are located on both sides of the first region 221 in the width direction at the longitudinal end portion 205 of the main body portion 2. The pair of second regions 222 have lower rigidity than the first region 221.

[0106] In the absorbent article 1, at the longitudinal end 205 of the main body 2, the fastening member 5 is disposed between the pair of second regions 222 and overlaps only with the first region 221. In this way, the fastening member 5 overlaps only with the first region 221, which has high rigidity, of the absorbent body 22, and does not overlap with the second region 222, which has low rigidity, thereby making it possible to suppress deformation of the fastening member 5 due to movements of the wearer of the outer article, etc. As a result, it is possible to suppress the longitudinal end 205 of the main body 2 of the absorbent article 1 from being turned up from the outer article.

[0107] Furthermore, at the longitudinal end 205 of the main body portion 2, the fixing region inner edge 332, which is the widthwise inner edge of the region (i.e., the fixing region 331) of the side wall bases 33 of the pair of side sheets 3 that is joined to the main body portion 2, overlaps only with the pair of second regions 222. In this way, the fixing region 331 of the side sheet 3 overlaps only with the second region 222, which has lower rigidity, of the absorber 22, and does not overlap with the first region 221, which has higher rigidity, thereby preventing the rigidity of the first region 221 from hindering the upright standing of the side sheet 3. Furthermore, because the fixing region 331 of the side sheet 3 does not overlap with the first region 221, where the fastening member 5 is provided, it is also possible to prevent the rigidity of the fastening member 5 from hindering the upright standing of the side sheet 3.

[0108] As described above, the fastening member 5 has a longitudinal direction in the width direction of the main body portion 2, and the longitudinal length of the fastening member 5 is preferably 80% or more of the width of the first region 221 in the width direction. This allows the longitudinal length of the fastening member 5 to be relatively large, thereby increasing the fastening force of the fastening member 5. As a result, it is possible to preferably prevent the end portion 205 in the longitudinal direction of the main body portion 2 of the absorbent article 1 from being turned up from the outer article.

[0109] As described above, the absorbent body 22 preferably includes a first absorbent core 261 and a second absorbent core 262. The second absorbent core 262 is disposed between the first absorbent core 261 and the backsheet 23. The width of the second absorbent core 262 at the longitudinal end 205 of the main body portion 2 is smaller than that of the first absorbent core 261. At the longitudinal end 205 of the main body portion 2, the first region 221 is a region where the first absorbent core 261 and the second absorbent core 262 overlap. At the longitudinal end 205 of the main body portion 2, the pair of second regions 222 are a pair of regions located on both sides of the second absorbent core 262 in the width direction and further outward in the width direction than the second absorbent core 262. This increases the absorbency at the longitudinal end 205 of the main body portion 2 and makes it easy to form the first region 221 and the second region 222.

[0110] As described above, at the longitudinal end 205 of the main body portion 2, the longitudinal distance L1 between one end edge 223 of the absorbent body 22 in the longitudinal direction and the first end edge 57 of the fastening member 5 in the longitudinal direction is preferably 5 mm or more and 20 mm or less. This makes it possible to increase the stability of fastening of the absorbent article 1 to the outer article, as described above. In addition, it is possible to suitably prevent the longitudinal end 205 of the main body portion 2 of the absorbent article 1 from being turned up from the outer article.

[0111] When attaching the absorbent article 1 to an outer garment, it is highly likely that a wearer or the like will handle the absorbent article 1 by holding the absorbent-free portion at the end 205 of the main body 2 of the absorbent article 1 (i.e., the portion where the absorbent body 22 is not present and where the top sheet 21 and the back sheet 23 are directly joined). Therefore, by setting the longitudinal distance between one edge 223 of the absorbent body 22 and the first edge 57 of the fastening member 5 to be 5 mm or more, it is possible to suppress deformation of the fastening member 5 when attaching the absorbent article 1. As a result, the absorbent article 1 can be attached to an outer garment in a suitable manner.

[0112] As described above, at the position where the fastening member 5 is arranged in the longitudinal direction, the width in the width direction of the absorbent body 22 is preferably 1.2 times or more the width in the width direction of the first region 221. This makes it possible to increase the widths of the pair of second regions 222 located on both sides of the first region 221 in the width direction, thereby increasing the absorption capacity at the longitudinal end 205 of the absorbent article 1. Furthermore, as described above, the absorbent article 1 can prevent the longitudinal end 205 of the main body portion 2 from turning up from the outer article, and therefore the structure of the absorbent article 1 is particularly suitable for absorbent articles in which the width of the second region 222, which has relatively low rigidity, is wide and the end 205 is relatively likely to turn up from the outer article.

[0113] As described above, the absorbent body 22 preferably includes an absorbent sheet 25 and an absorbent core 26. The absorbent core 26 is disposed between the absorbent sheet 25 and the back sheet 23. The absorbent core 26 is a bulky member that is thicker than the absorbent sheet 25. The absorbent sheet 25 includes a liquid-permeable lower layer sheet 252, a liquid-permeable upper layer sheet 251, and a granular and / or fibrous absorbent resin 253. The upper layer sheet 251 is laminated with the lower layer sheet 252. The absorbent resin 253 is fixed between the lower layer sheet 252 and the upper layer sheet 251. The region of the absorbent sheet 25 where the absorbent resin 253 is disposed (i.e., the absorbent resin disposition region 257) has its longitudinal direction in the longitudinal direction of the main body portion 2. At the longitudinal end 205 of the main body 2, the width in the width direction perpendicular to the longitudinal direction of the region of the absorbent sheet 25 where the absorbent resin 253 is placed is preferably equal to or less than the width in the width direction of the first region 221. Furthermore, the fastening member 5 has a longitudinal direction in the width direction of the main body 2. At the longitudinal end 205 of the main body 2, the longitudinal length of the fastening member 5 is preferably equal to or less than the width in the width direction of the region of the absorbent sheet 25 where the absorbent resin 253 is placed (i.e., the region 257 where the absorbent resin can be placed).

[0114] In this way, by disposing the fastening member 5 in the first region 221, which has a relatively high rigidity, in a region where the rigidity is further increased by providing the absorbent resin disposition possible region 257, it is possible to further suppress deformation of the fastening member 5 caused by the movements of the wearer of the outer garment, etc. As a result, it is possible to further suppress the longitudinal end 205 of the main body 2 of the absorbent article 1 from being turned up from the outer garment.

[0115] As described above, the fastening member 5 preferably includes a base sheet 51 and a plurality of hook elements 52. The plurality of hook elements 52 stand upright on the base sheet 51. Each of the plurality of hook elements 52 includes a columnar stem 53 and a head 54. The stem 53 stands upright on the base sheet 51. The head 54 is provided at the tip of the stem 53. The head 54 preferably has a shape having a minor axis R1 and a major axis R2 in a plan view. The fastening member 5 has a longitudinal direction in the width direction of the main body portion 2. The major axis R2 of the head 54 of each hook element 52 is preferably parallel to the longitudinal direction of the fastening member 5. This increases the rigidity of the fastening member 5 in the width direction (i.e., the left-right direction), thereby further suppressing deformation of the fastening member 5 due to movements of the wearer of the outer garment. As a result, the longitudinal end 205 of the main body portion 2 of the absorbent article 1 can be more effectively prevented from turning up from the outer garment.

[0116] As described above, it is preferable that the upper surface of the head 54 has projections and recesses. This allows the fastening member 5 to be firmly engaged with the nonwoven fabric that forms the inner surface of the outer garment. As a result, it is possible to more effectively prevent the longitudinal end 205 of the main body 2 of the absorbent article 1 from being turned up from the outer garment.

[0117] The absorbent article 1 described above can be modified in various ways.

[0118] For example, in the fastening member 5, the upper surface of the head 54 of the hook element 52 does not need to be uneven. Furthermore, the major axis R2 of the head 54 in plan view does not necessarily need to be parallel to the width direction, but may be parallel to the longitudinal direction or may be inclined relative to the longitudinal direction and the width direction. Note that the shape of the head 54 in plan view does not need to be an ellipse or the like having a minor axis R1 and a major axis R2, and may be another shape such as a perfect circle or rectangle.

[0119] The longitudinal length of the fastening member 5 may be greater than the width B1 of the absorbent resin-disposable region 257 of the absorbent sheet 25. Furthermore, the width B1 of the absorbent resin-disposable region 257 may be greater than the width of the first region 221. Note that the absorbent sheet 25 does not necessarily need to be provided in the absorbent article 1 and may be omitted.

[0120] At the position where the fastening member 5 is arranged in the longitudinal direction, the width of the absorbent body 22 may be less than 1.2 times the width of the first region 221.

[0121] The distance L1 in the longitudinal direction between one edge 223 of the absorbent body 22 and the first edge 57 of the fastening member 5 may be less than 5 mm or may be greater than 20 mm.

[0122] At the end 205 in the longitudinal direction of the main body portion 2, the longitudinal length of the fastening member 5 may be less than 80% of the width of the first region 221.

[0123] At the longitudinal end 205 of the main body portion 2, the structure of the absorbent body 22 is not limited to the above example and may be modified in various ways, as long as the rigidity of the first region 221 of the absorbent body 22 is higher than the rigidity of the pair of second regions 222. For example, the absorbent core 26 is not limited to a laminated structure of a first absorbent core 261 and a second absorbent core 262, but may be composed of only a single layer of absorbent core. In this case, the difference in rigidity between the first region 221 and the second region 222 may be achieved, for example, by changing the thickness of the absorbent core or by changing the arrangement or presence or absence of slits, through-holes, and / or embossments provided in the absorbent core. Alternatively, the difference in rigidity may be achieved by changing the type of absorbent material, such as pulp, provided in the absorbent core, or by changing the type and number of sheets of material wrapping the absorbent material.

[0124] In the absorbent article 1, as long as the fastening member 5 provided at one end 205 in the longitudinal direction of the main body portion 2 is arranged as described above, the fastening member 5 provided at the other end 205 may be arranged in a different manner. Alternatively, the fastening member 5 may be provided at only one of the both end portions 205 in the longitudinal direction of the main body portion 2. Furthermore, in the absorbent article 1, the fastening member 5 may also be provided at a portion other than the end portion 205 in the longitudinal direction of the main body portion 2.

[0125] The fastening member 5 does not necessarily have to be a hook-and-loop fastener, but may have other structures such as adhesive tape.

[0126] The absorbent article 1 does not necessarily have to be an auxiliary absorbent implement attached to the inside of a disposable diaper or the like, but may also be an absorbent article attached to the inside of underwear or the like.

[0127] The configurations in the above-described embodiment and each modification may be combined as appropriate as long as they are not mutually contradictory. [Explanation of symbols]

[0128] 1. Absorbent articles 2 Main body 3 Side seats 5 Fastening member 21 Topsheet 22 Absorbent 23 Back Seat 25 Absorbent Sheet 26 Absorption Core 33 Side wall base 34 Side wall standing part 39 Side wall fold line 51 Base sheet 52 Hook Elements 53 Stem 54 head 57 (of fastening member) first edge 58 (Second edge of fastening member) 205 End 221 First area 222 Second area 223 (Absorbent body) One of the pair of longitudinal edges 251 Upper Seat 252 Lower Sheet 253 Absorbent Resin 257 Absorbent resin placement area 261 First Absorption Core 262 Second absorption core 331 Fixed area 332 Fixed area inner edge

Claims

1. An absorbent article that is attached to the wearer side of an outer article worn by a wearer and receives excrement from the wearer, a main body; a pair of side sheets provided on both sides of the main body in the width direction and standing up toward the wearer when worn; a fastening member provided on a surface of the main body portion opposite to the wearer side at an end portion in the longitudinal direction of the main body portion, the fastening member being capable of being fastened to an outer article; Equipped with The main body portion is a liquid-permeable top sheet; a liquid-repellent and / or liquid-impermeable back sheet; an absorbent body disposed between the top sheet and the back sheet and having a longitudinal direction in the longitudinal direction of the main body portion; Equipped with Each of the pair of side sheets is a side wall base portion fixed to a side portion on a wearer-facing surface of the main body portion; a side wall upright portion that is folded back from the side wall base portion along the side wall fold line extending in the longitudinal direction and that stands up toward the wearer when worn; Equipped with The absorbent body is a first region located at a center portion in the width direction at the end portion in the longitudinal direction of the main body portion; a pair of second regions located on both sides of the first region in the width direction at the longitudinal end of the main body portion and having lower rigidity than the first region; Equipped with At the end of the main body portion in the longitudinal direction, the fastening member is disposed between the pair of second regions and overlaps only the first region; An absorbent article in which, at the longitudinal end of the main body portion, the inner edge of a fixed region, which is the widthwise inner edge of the region of the side wall base of the pair of side sheets that is joined to the main body portion, overlaps only with the pair of second regions.

2. The absorbent article according to claim 1, The fastening member has a longitudinal direction in the width direction of the main body portion, and the length of the longitudinal direction of the fastening member is 80% or more of the width of the first region in the width direction.

3. The absorbent article according to claim 1 or 2, The absorbent body is a first absorbent core; a second absorbent core disposed between the first absorbent core and the back sheet, the second absorbent core having a width in the width direction at the end portions in the longitudinal direction of the main body portion smaller than that of the first absorbent core; Equipped with At the end of the main body portion in the longitudinal direction, the first region is a region where the first absorbent core and the second absorbent core overlap each other, An absorbent article in which, at the longitudinal end of the main body portion, the pair of second regions are a pair of regions located on both sides of the second absorbent core in the width direction and further outward in the width direction than the second absorbent core.

4. The absorbent article according to claim 1 or 2, An absorbent article in which, at the longitudinal end of the main body portion, the longitudinal distance between one end edge of the absorbent body in the longitudinal direction and the first end edge of the fastening member in the longitudinal direction is 5 mm or more and 20 mm or less.

5. The absorbent article according to claim 1 or 2, An absorbent article wherein the width in the width direction of the absorbent body at a position where the fastening member is arranged in the longitudinal direction is 1.2 times or more the width in the width direction of the first region.

6. The absorbent article according to claim 1 or 2, The absorbent body is An absorbent sheet; a bulky absorbent core that is disposed between the absorbent sheet and the back sheet and is thicker than the absorbent sheet; Equipped with The absorbent sheet is a liquid-permeable lower layer sheet; a liquid-permeable upper layer sheet laminated on the lower layer sheet; a granular and / or fibrous absorbent resin fixed between the lower sheet and the upper sheet; Equipped with a region of the absorbent sheet in which the absorbent resin is disposed has a longitudinal direction in the longitudinal direction of the main body portion; At the end of the main body portion in the longitudinal direction, a width in a width direction perpendicular to the longitudinal direction of the region of the absorbent sheet where the absorbent resin is disposed is equal to or less than a width in the width direction of the first region, The fastening member has a longitudinal direction in the width direction of the main body portion, An absorbent article in which the longitudinal length of the fastening member at the longitudinal end of the main body portion is less than or equal to the width in the width direction of the region of the absorbent sheet in which the absorbent resin is arranged.

7. The absorbent article according to claim 1 or 2, The fastening member is A base sheet; a plurality of hook elements standing on the base sheet; Equipped with Each of the plurality of hook elements comprises: A columnar stem standing on the base sheet; a head provided at a tip end of the stem and having a shape with a minor axis and a major axis in a plan view; Equipped with The fastening member has a longitudinal direction in the width direction of the main body portion, An absorbent article wherein the major axis of the head of each hook element is parallel to the longitudinal direction of the fastening member.

8. The absorbent article according to claim 7, The absorbent article has an upper surface of the head having irregularities.

Images