Absorbent article

Abstract

To provide an absorbent article that can improve erection properties of three-dimensional gathers.SOLUTION: An absorbent article includes a body having a surface sheet, a back surface sheet, and an absorber. The body is divided into a front area, a middle area having an excretion part opposing area, and a back area. The body includes a right and left pair of first adhesive parts, a right and left pair of second adhesive parts, and a pair of three-dimensional gathers on an underwear contact surface. The pair of second adhesive parts is positioned behind the pair of first adhesive parts with a separation part in which an adhesive part is not disposed in between. The body includes a separation part in the front area and / or the back area. The three-dimensional gathers include an elastic member, and include an erection area, a front fixed area, and a back fixed area. A front end part of the erection area is positioned in the front area, and a back end part of the erection area is positioned in the back area. The front end part and / or the back end part are positioned in an adhesion part non-present area including at least part of the separation part, where the adhesion part is not present over an entire width in a transverse direction of the absorbent article, or positioned more inside in a vertical direction than the adhesion part non-present area.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to absorbent articles such as sanitary napkins. [Background technology]

[0002] Generally, absorbent articles such as sanitary napkins are worn by fastening them to underwear with an adhesive portion disposed on the non-skin side. Some such absorbent articles have a pair of three-dimensional gathers extending in the front-to-back direction on both the left and right sides of the skin side to prevent leakage (e.g., Patent Documents 1 to 3). The three-dimensional gathers include an elastic member, and when worn, the three-dimensional gathers stand up against the body as the article curves forward and backward to fit the shape of the body, filling in any gaps that occur between the article and the wearer's body and preventing leakage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-103711 [Patent Document 2] Japanese Patent Application Publication No. 2020-156578 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-176449 Summary of the Invention [Problem to be solved by the invention]

[0004] The three-dimensional gathers effectively exhibit their leak-proofing function by maintaining a stable standing shape, so there is a demand for improving the standing ability of the three-dimensional gathers.

[0005] An object of the present invention is to provide an absorbent article that can improve the standing ability of standing gathers. [Means for solving the problem]

[0006] An absorbent article according to one aspect of the present invention includes a main body. The main body extends in a longitudinal direction corresponding to the front-to-back direction of the wearer, and is divided into a front region, a middle region having an excretory region, and a rear region. The main body has a lateral direction corresponding to the left-right direction of the wearer. The main body has a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet. The main body includes a pair of first adhesive portions on both sides in the lateral direction, a pair of second adhesive portions on both sides in the lateral direction, and a pair of standing gathers. The pair of first adhesive portions and the pair of second adhesive portions are arranged on the underwear contact surface of the main body. The pair of first adhesive portions extend in the vertical direction. The pair of second adhesive portions are located behind the pair of first adhesive portions with a separation portion in between where no adhesive portion is disposed, and extend in the vertical direction. The pair of standing gathers extend longitudinally along both lateral sides of the main body. The main body has the spaced apart portion in the front region and / or the rear region. The standing gathers have a configuration in which an elastic member that is stretchable in the vertical direction is fixed to a sheet member. The three-dimensional gathers have a vertically extending standing region that can stand up toward the wearer's skin at least in the intermediate region, a front fixing region that is located in front of the standing region and fixed to the top sheet, and a rear fixing region that is located behind the standing region and fixed to the top sheet. The front end of the standing region is located in the front region, and the rear end of the standing region is located in the rear region. At least one of the front end portion and the rear end portion is located within an adhesive-free area that includes at least a portion of the separation portion, where no adhesive portion is present across the entire horizontal width of the absorbent article, or is located vertically inward of the adhesive-free area. [Effects of the Invention]

[0007] According to the absorbent article of the present invention, the standing gathers can be made to stand up stably. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view showing an absorbent article according to one embodiment of the present invention as viewed from the skin side. [Figure 2] FIG. 2 is a plan view of the absorbent article as viewed from the non-skin side. [Figure 3] FIG. 2 is a plan view of an absorbent core that constitutes a part of the absorbent article. [Figure 4] FIG. 6 is a cross-sectional view of the absorbent article taken along line VI-VI in FIG. 2. [Figure 5] 1 is a schematic diagram showing the state of a wearer wearing an absorbent article according to the present invention when walking. [Figure 6] 10(A) and 10(B) are plan views showing absorbent articles according to other embodiments as viewed from the skin side. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, mutually orthogonal coordinate axes, that is, X-axis, Y-axis, and Z-axis, are appropriately shown. In the following description, the same reference numerals will be used for components already mentioned, and the description may be omitted.

[0010] <Overall structure of absorbent article>

[0011] An absorbent article 1 according to one embodiment of the present invention is configured as a sanitary napkin and will be referred to hereinafter as the napkin 1. The napkin 1 has a longitudinal direction X corresponding to the front-to-back direction of the wearer and a transverse direction Y corresponding to the left-to-right direction of the wearer and perpendicular to the longitudinal direction X. Furthermore, the napkin 1 has a thickness direction Z perpendicular to both the longitudinal direction X and the transverse direction Y. In this specification, with respect to the thickness direction Z, the side closest to the wearer's skin may be referred to as the upper or skin side, and the side closest to the underwear may be referred to as the lower or non-skin side. In this specification, the term "plan view" refers to a plan view seen from the thickness direction Z. In this specification, the term "inner side in the transverse direction Y" refers to a side closer to the transverse direction Y toward the longitudinal centerline CL1 that bisects the transverse direction Y of the napkin 1, and the term "outer side in the transverse direction Y" refers to a side farther away from the longitudinal centerline CL1 in the transverse direction Y. "Inward in the longitudinal direction X" means approaching the longitudinal direction X toward the horizontal center line CL2 that bisects the longitudinal direction X of the napkin 1, and "outward in the longitudinal direction X" means moving away in the longitudinal direction X toward the horizontal center line CL2 that bisects the longitudinal direction X of the napkin 1. The napkin 1 may be used while sleeping, and may have a length of 290 mm or more along the longitudinal direction X. The napkin 1 has a maximum length (total length) of 300 mm in the longitudinal direction X and a maximum length (total width) of 160 mm in the horizontal direction.

[0012] As shown in FIGS. 1 and 2, the absorbent article 1 includes a main body M, a pair of wings W, a pair of hip guards H, and a pair of standing gathers G.

[0013] The main body M extends in a strip shape along the longitudinal direction X, and is fixed to the inner surface of the wearer's underwear when worn. The main body M is divided along the longitudinal direction X into a front region M1, a middle region M2, and a rear region M3. The middle region M2 includes an excretory part-facing region that faces the wearer's excretory part when worn. The excretory part-facing region is located at the center of the middle region M2 in the lateral direction Y. When the absorbent article is a napkin 1, the excretory part is the vaginal opening. The middle region M2 is the region where the wings W are provided. The front region M1 is a region that is disposed in front of the middle region M2 (on the wearer's ventral side) and faces the front of the wearer's excretory area when worn. The rear region M3 is an area located behind the middle region M2 (on the back side of the wearer) and faces the rear of the wearer's excretory area when worn. The rear region M3 is an area where a hip guard H is provided. The term "when worn" as used herein means a state in which the normal, proper wearing position (the expected wearing position of the napkin 1) is maintained, and does not include a state in which the napkin 1 is shifted from that wearing position.

[0014] The main body M extends along the longitudinal direction X and is placed on the inner surface of the wearer's underwear. The main body M has the function of absorbing liquids (hereinafter also referred to as "liquid") such as menstrual blood of the wearer.

[0015] The pair of wings W extend outward in the lateral direction Y from the middle region M2 of the main body M. The wings W extend outward in the lateral direction from the underwear between the wearer's crotch, then fold inward and fasten to the outer surface of the underwear. This prevents the middle region M2 of the main body M from slipping out of the wearer's crotch.

[0016] The wings W are provided over the entire length in the longitudinal direction X in the middle region M2 of the main body M. In the napkin 1 according to this embodiment, the position of the middle region M2 in the main body M corresponds to the position of the wings W, and the middle region M2 is defined as the portion of the main body M where the wings W are provided. The front and rear ends of the wings W are the starting points for extension in the lateral direction Y at the front and rear, respectively, of the wings W.

[0017] The pair of hip guards H extend outward in the horizontal direction Y from the rear region M3 of the main body M and partially encase the buttocks inside the wearer's underwear. The hip guards H are located behind the wings W. In the napkin 1 according to this embodiment, the hip guards H are provided over the entire length of the rear region M3 in the vertical direction X, the position of the rear region M3 on the main body M corresponds to the position of the hip guards H, and the rear region M3 is defined as the portion of the main body M where the hip guards H are provided.

[0018] A pair of three-dimensional gathers G are arranged on both sides of the width direction so as to extend in the vertical direction X along the horizontal direction Y side of the main body M. The three-dimensional gathers G stand up in the thickness direction Z while being worn, and have the function of preventing leakage of liquid in the horizontal direction Y. Note that "standing up in the thickness direction" means standing up toward the wearer.

[0019] In the napkin 1, the three-dimensional gathers G are arranged over the entire length of the main body M. The three-dimensional gathers G are configured so that at least a portion of them can stand up when they contract in the vertical direction X. The three-dimensional gathers G are formed by folding back the inner side in the horizontal direction Y of the side sheets 5 arranged on the sides of the main body M in the horizontal direction Y to the outer side in the horizontal direction Y. Note that the sheet member forming the three-dimensional gathers G is not limited to the side sheets 5, and may be a sheet member separate from the side sheets 5.

[0020] The three-dimensional gathers G have an upright region G1 that can stand up in the thickness direction from the main body M, and a front fixing region G2 and a rear fixing region G3 that are joined to the main body M. The three-dimensional gathers G will be described in detail later.

[0021] As shown in Fig. 2, the napkin 1 has constricted portions 11 between the wings W and the hip guards H, where the left and right side edges 1S along the longitudinal direction X are constricted inward in the lateral direction Y. The portion of the napkin 1 that overlaps with the rear region M3 in the longitudinal direction X is referred to as the rear portion 80. The rear portion 80 includes the rear region M3 of the main body M and a pair of hip guards H.

[0022] The rear portion 80 has a first region 21 and a second region 22. In the rear portion 80, the first region 21 is an increasing region in which the length (width) of the napkin 1 in the lateral direction Y gradually increases from the front to the rear. The second region 22 is located rearward of the first region 21 and is a decreasing region in which the width of the napkin 1 gradually decreases rearward from the point where the width is maximum. As shown in FIG. 2, in the napkin 1, the width of the rear portion 80 is maximum at the boundary between the first region 21 and the second region 22 (in other words, the width of the pair of hip guards H is maximum).

[0023] In this embodiment, the rear portion 80 has a shape in which the second region 22 is located immediately behind the first region 21, but there may be a third region between the first region 21 and the second region 22, in which the width of the napkin 1 does not change from the front to the rear. In this case, the third region is the part of the rear portion 80 where the width is maximum.

[0024] 2 and 4, the napkin 1 comprises a topsheet 2, an absorbent body 4, a backsheet 3, and a pair of sidesheets 5. In the main body M, the napkin 1 has a configuration in which the backsheet 3, absorbent body 4, and topsheet 2 are laminated in the thickness direction Z. These components are appropriately joined and integrated, for example, by bonding with an adhesive or heat sealing, or by compression processing using the round compressed grooves 6, second horizontal compressed grooves 12, and third horizontal compressed grooves 13.

[0025] The top sheet 2 is disposed above the absorbent body 4 in the thickness direction Z. A pair of side sheets 5 extend in the longitudinal direction X and are disposed on both left and right sides of the top sheet 2. The side sheets 5 are provided over both left and right sides of the main body M, the wings W, and the hip guards H. The side sheets 5 are joined to the top sheet 2, for example, by an adhesive 9. The back sheet 3 is disposed below the absorbent body 4 in the thickness direction Z. The back sheet 3 is provided over the entire main body M, the wings W, and the hip guards H. Both the top sheet 2 and the side sheets 5 are located on the back sheet 3. The back sheet 3 is joined to the top sheet 2 and the side sheets 5, for example, at its periphery, by an adhesive, heat sealing, etc.

[0026] The top sheet 2 is made of a highly liquid-permeable sheet material so that it can efficiently absorb liquids such as menstrual blood from the top surface. On the other hand, the back sheet 3 and side sheets 5 are made of a less liquid-permeable sheet material so that liquids absorbed from the top sheet 2 do not easily leak out. The top sheet 2, back sheet 3, and side sheets 5 can be made of materials similar to those conventionally used in the relevant technical field, without any particular restrictions. For example, the top sheet 2 can be made of a liquid-permeable nonwoven fabric or a perforated film. The back sheet 3 can be made of a liquid-impermeable film made of synthetic resin, or a water-repellent nonwoven fabric with high water pressure resistance, such as a spunbond-meltblown-spunbond laminated nonwoven fabric. The side sheets 5 can be made of a water-repellent nonwoven fabric with high water pressure resistance, such as a spunbond-meltblown-spunbond laminated nonwoven fabric.

[0027] As shown in FIG. 2, the backsheet 3 is provided with adhesive portions 31-34 for fixing the main body M, wings W, and hip guard H to underwear. The non-skin-contacting side of the backsheet 3 of the napkin 1 on which the adhesive portions 31-34 are provided is referred to as the underwear-contacting side 3a. The wings W are formed by laminating the side sheets 5 and the backsheet 3 in the thickness direction Z, and the underwear-contacting side of the wings W corresponds to the non-skin-contacting side of the backsheet 3. As shown in FIG. 4, the hip guard H is formed by laminating the side sheets 5 and the backsheet 3 in the thickness direction Z, and the underwear-contacting side of the hip guard H corresponds to the non-skin-contacting side of the backsheet 3. The underwear-contacting side of the main body M corresponds to the non-skin-contacting side of the backsheet 3. The front adhesive portion 31, rear adhesive portion 32, wing adhesive portion 33, and hip guard adhesive portion 34 will be described later.

[0028] The absorbent body 4 extends in the longitudinal direction X and is disposed between the topsheet 2 and the backsheet 3. The absorbent body 4 absorbs liquid from the surface facing the topsheet 2 and diffuses the liquid internally to retain it. The absorbent body 4 may be any material that has been conventionally used in the relevant technical field without any particular restrictions. In the napkin 1, the absorbent body 4 has an absorbent core 7 and a core wrap sheet 8. The absorbent core 7 may be formed of a fiber aggregate made of hydrophilic fibers such as pulp fibers, or may have a configuration in which a water-absorbing polymer is held in the fiber aggregate. The absorbent core 7 will be described later. The core wrap sheet 8 covers the absorbent core 7 and has the function of, for example, maintaining the shape of the absorbent core 7. The core wrap sheet 8 is formed, for example, from thin, soft paper such as tissue paper or a liquid-permeable nonwoven fabric.

[0029] <Detailed configuration of absorbent article>

[0030] As shown in Fig. 2, in the napkin 1 of this embodiment, a pair of front adhesive portions 31 and a pair of rear adhesive portions 32 spaced apart in the longitudinal direction X are arranged on the underwear-contacting surface 3a of the main body M, and a separation portion 35 where no adhesive portion is present is provided between the pair of front adhesive portions 31 and the pair of rear adhesive portions 32. In the napkin 1, the range of the separation portion 35 is a rectangular portion having four vertices: a vertex located on the rear outer side in the lateral direction Y of each of the pair of rectangular front adhesive portions 31, and a vertex located on the front outer side in the lateral direction Y of each of the pair of rectangular rear adhesive portions 32. When worn, the separation portion 35 is located in the vicinity of the wearer's anus. As shown in Figs. 2 and 4, a region of the napkin 1 where no adhesive portion is present across the entire width of the napkin 1 in the lateral direction Y, including at least a portion of the separation portion 35, is referred to as an adhesive-free region 36.

[0031] In the napkin 1, the front adhesive portion 31 and the rear adhesive portion 32 are spaced apart in the vertical direction X, and further, the position of the front end of the hip guard adhesive portion 34 in the vertical direction X is positioned rearward of the position of the rear end of the front adhesive portion 31 in the vertical direction X, thereby forming an adhesive-free region 36. In the napkin 1 of this embodiment, the position in the longitudinal direction X of the front end of the hip guard adhesive portion 34 coincides with the position in the longitudinal direction X of the front end of the rear adhesive portion 32, but is not limited to this. The position in the longitudinal direction X of the front end of the hip guard adhesive portion 34 may be behind or in front of the position in the longitudinal direction X of the front end of the rear adhesive portion 32, as long as an adhesive-free region is formed across the entire width of the napkin 1 in the lateral direction Y, including at least a portion of the separation portion 35. Also, the napkin may not be provided with the hip guard adhesive portion 34, and similarly to the napkin 1, an adhesive-free area can be formed.

[0032] In the napkin 1, the rear end G1a of the standing region G1 of the upright gathers G is positioned within the non-adhesive region 36 or positioned further inward in the longitudinal direction X than the non-adhesive region 36, thereby enabling the upright gathers to stand stably and effectively suppressing leakage. This will be explained in detail below.

[0033] [Adhesive part] 2, the napkin 1 is provided with a pair of first adhesive portions, ie, front adhesive portions 31, a pair of second adhesive portions, ie, rear adhesive portions 32, a pair of wing adhesive portions 33, and a pair of hip guard adhesive portions 34, which are arranged on the underwear-contacting surface 3a of the backsheet 3. These adhesive portions are formed by applying an adhesive such as a hot-melt adhesive to the underwear-contacting surface 3a of the backsheet 3.

[0034] (Front adhesive part and rear adhesive part) The pair of front adhesive portions 31 and the pair of rear adhesive portions 32 have the function of fixing the main body M to the inner surface of the wearer's underwear. In a plan view of the napkin 1, the front adhesive portions 31 and the rear adhesive portions 32 are present in the region where the absorbent body 4 is present. Both the front adhesive portions 31 and the rear adhesive portions 32 have a rectangular shape that is long in the longitudinal direction X. The front adhesive portion 31 extends continuously in the longitudinal direction X over part of the front region M1, part of the middle region M2, and part of the rear region M3. A pair of front adhesive portions 31 are provided, one on each side of the longitudinal centerline CL1. As shown in Figure 2, the front adhesive portion 31 may be located in the constricted portion 11. The presence of the adhesive portion increases the rigidity of the napkin 1 near the constricted portion 11, making the absorbent body 4 near the constricted portion 11 less likely to deform, thereby ensuring a good absorption capacity of liquid. The rear adhesive portions 32 are located near the rear edge of the rear region M3 and extend continuously in the longitudinal direction X. The rear adhesive portions 32 are provided in a pair, one on each side of the longitudinal center line CL1. On the underwear contact surface 3a, the pair of rear adhesive portions 32 are arranged rearward in the longitudinal direction X from the pair of front adhesive portions 31, with a separation portion 35 interposed therebetween. The separation portion 35 is a portion where no adhesive portion exists between the pair of front adhesive portions 31 and the pair of rear adhesive portions 32, and the front adhesive portions 31 and the rear adhesive portions 32 are separated in the longitudinal direction X.

[0035] (Wing adhesive part) A pair of wing adhesive portions 33 is disposed on each of the pair of wings W. The wing adhesive portions 33 have the function of fixing the folded wing W to the outer surface of the wearer's underwear. In the napkin 1, the wing adhesive portion 33 is divided into three in the horizontal direction Y, and is configured by three vertical adhesive portions 330 extending in the vertical direction X and provided intermittently in the horizontal direction Y. All three vertical adhesive portions 330 have a rectangular shape that is long in the vertical direction X. The wing adhesive portion 33, which is an assembly of the three vertical adhesive portions 330, has an overall rectangular shape.

[0036] (Hip guard adhesive part) As shown in Fig. 2, a pair of hip guard adhesive parts 34 are respectively arranged on a pair of hip guards H. The hip guard adhesive parts 34 have the function of fixing the hip guards H to the inner surface of the wearer's underwear. The hip guard adhesive parts 34 have a rectangular shape.

[0037] 2, the hip guard adhesive portion 34 is disposed at a location where the width of the rear portion 80 of the napkin 1 is at its widest. Typically, the hip guard adhesive portion 34 is disposed so that its center in the longitudinal direction X is located at a location where the width of the rear portion 80 is at its widest (in this embodiment, at the boundary between the first region 21 and the second region 22). This configuration effectively prevents the left and right side edges of the hip guard H from rolling up when worn.

[0038] [Separation part] 2, the napkin 1 has a separation portion 35 in the longitudinal direction X between the front adhesive portion 31 and the rear adhesive portion 32, where no adhesive portion exists. In a plan view, the separation portion 35 overlaps with the first region 21. As described above, in the napkin 1, by providing the separation portion 35 and positioning the front end of the hip guard adhesive portion 34 behind the rear end of the front adhesive portion 31, an adhesive-free region 36 in which no adhesive portion exists across the entire width in the lateral direction Y is formed in the first region 21 of the napkin 1.

[0039] 2, a cross-shaped adhesive-free region is present in a region surrounding the outer edges of the pair of front adhesive regions 31 and the pair of rear adhesive regions 32 (a rectangular region surrounded by connecting the outer vertices of the rectangular adhesive regions 31 and 32 in the horizontal direction Y and the outer vertices in the vertical direction X). The spaced portion 35 corresponds to the horizontal line portion of the cross-shaped adhesive-free region.

[0040] [3D gathers] The three-dimensional gathers G have, along the vertical direction X, a standing region G1, a front fixing region G2, and a rear fixing region G3.

[0041] The standing region G1 is a region configured to be able to stand in the thickness direction of the main body M. As shown in FIG. 4, the standing region G1 has a standable portion 51, which is a portion of the folded-back portion of the side sheet 5 that is not joined to the main body M. The standing region G1 is configured to be able to stand toward the wearer's skin at least in the middle region M2. In the napkin of this embodiment, as shown in FIGS. 1 and 2, the standing region G1 is provided to extend continuously in the longitudinal direction X over part of the front region M1, the middle region M2, and part of the rear region M3. In the rear region M3, the standing region G1 is provided in the first region 21 where the width increases, and does not extend to the second region 22 where the width decreases. The front end G1b of the standing region G1 is located in the front region M1, and the rear end G1a is located in the rear region M3.

[0042] The front fastening region G2 and the rear fastening region G3 are non-standing portions. The front fastening region G2 and the rear fastening region G3 are located on the longitudinal edge sides of the front region M1 and the rear region M3, respectively, and are portions of the folded-back portion of the side sheet 5 that are joined to the main body M and are prevented from standing up in the thickness direction Z. In Figure 2, the front fastening region G2 and the rear fastening region G3 are indicated by dots.

[0043] The three-dimensional gathers G include elastic members 14 that are stretchable in the longitudinal direction X. The elastic members 14 are, for example, composed of thread-like or strip-like elastic members, and a plurality of elastic members are provided in the napkin 1. In the napkin 1, the elastic members 14 are arranged throughout the three-dimensional gathers G in the standing region G1, the front fastening region G2, and the back fastening region G3, but it is sufficient that they are arranged at least in the standing region G1. The elastic members 14 are attached in a stretched state in the longitudinal direction X to the side sheets 5 that are stretched in the XY plane. As a result, when worn, contraction of the standing region G1 causes the main body M to curve in the longitudinal direction X, causing the standing region G1 to stand up from the main body M toward the skin. In the three-dimensional gathers G, the stretching force of the gathers is particularly strong near the rear end G1a and the front end G1b, which are the ends of the standing region G1.

[0044] (Positional relationship between the three-dimensional gathers and the adhesive-free area) The napkin is provided with a separation portion 35, and is configured so that the rear end portion G1a of the standing region G1 of the three-dimensional gathers G is located within the adhesive-free region 36 or is located more inward in the longitudinal direction X than the adhesive-free region 36. As shown in FIG. 2 , in the napkin 1 of this embodiment, the rear end portion G1a is located within the adhesive-free region 36.

[0045] In this way, by positioning the rear end G1a, which is a part of the upright gathers G that has particularly strong stretch, within the adhesive-free region 36, the ability to stand up of the standable portions 51 in the standable region G1 can be improved. That is, because the napkin 1 is not fixed to the underwear in the adhesive-free region 36, the stretchable force near the rear end G1a can be fully exerted, making it easier to pull the absorbent body 4 in with the contractile force of the elastic members 14 of the upright gathers G, improving the ability to stand up of the standable portions 51, which in turn improves the ability to stand up of the standable region G1 and makes it easier to maintain a stable upright state of the standable region G1. This makes it easier for the upright gathers G to fill in gaps that occur between the napkin and the wearer's body, and the upright gathers G can effectively exhibit their leak-proofing function (fluid leakage prevention function).

[0046] 5, the non-adhesive region 36 of the napkin 1 of this embodiment is located in correspondence with the vicinity of the buttocks. For example, when lying on one's back while sleeping, liquid leakage is likely to occur around the buttocks, but by positioning the rear end G1a of the napkin 1 within the non-adhesive region 36, the three-dimensional gathers G can be made to stand up well against the body even around the buttocks, which has a high curvature, thereby effectively preventing liquid leakage.

[0047] Furthermore, in the napkin 1, the three-dimensional gathers G effectively exhibit the leak-proofing function even when the wearer is moving, such as walking.

[0048] When wearing a napkin, the wearer's movements cause significant deformation of the underwear worn by the wearer. The first region 21 of the napkin 1 corresponds to a portion of the underwear that is particularly subject to deformation due to the wearer's walking movements, and during movement, a twisting force is likely to be applied to the first region 21 obliquely backward from the middle region M2 in response to the deformation of the underwear. As shown in FIG. 5 , in the napkin 1 of this embodiment, a separation portion 35 (adhesive-free region 36) is provided in the first region 21, which is likely to be subjected to a large twisting force obliquely backward from the middle region M2. Because the separation portion 35 (adhesive-free region 36) of the napkin 1 is not fixed to the underwear, as shown in the area surrounded by a circle 91, deformation of the underwear 90 caused by the wearer P's movements, such as walking, is less likely to be transmitted to the napkin 1 in the separation portion 35 (adhesive-free region 36) of the napkin 1, and deformation that follows the deformation of the underwear 90 is less likely to occur. As a result, the napkin 1 is less likely to have the rear end G1a shift in position in response to deformation of the underwear 90, and the stretching force near the rear end G1a can be fully exerted, improving the standing ability of the standing region G1, and the three-dimensional gathers G can exert an effective leak-proofing function.

[0049] Furthermore, in the napkin 1 of this embodiment, in a plan view, the front adhesive portion 31 and the rear adhesive portion 32 are located within the area sandwiched between a pair of three-dimensional gathers G, and the rear end G1a and the front end G1b of the standing region G1 do not overlap the adhesive portions in a plan view. In the napkin 1, since the three-dimensional gathers G do not overlap the adhesive portions in a plan view, the areas of the napkin 1 corresponding to the three-dimensional gathers G are not fixed to the underwear when worn, making it easier for the standing region G1 to stand up against the skin.

[0050] [Absorbent core] 3, the absorbent core 7 has a rear high basis weight region 71 and a front high basis weight region 72 which are high rigidity regions, and a low basis weight region 73 which is a low rigidity region. The low basis weight region is a region in which the absorbent material (hereinafter sometimes referred to as "constituent fibers") of the absorbent body 4 has a lower basis weight and lower rigidity than the front and rear high basis weight regions. The low basis weight region 73 is provided across the front region M1, the middle region M2, and the rear region M3 of the napkin 1, and is positioned so as to surround each of the rear high basis weight region 71 and the front high basis weight region 72. The front high basis weight region 72 is provided across part of the front region M1, the middle region M2, and part of the rear region M3. The front high basis weight region 72 has a central portion 721 having a vertically elongated rounded rectangular shape in plan view that is long in the longitudinal direction X, and side portions 722 that bulge outward in the transverse direction Y from both side edges of the central portion 721 along the longitudinal direction X. The front high basis weight region 72 is a region in which the basis weight of the constituent fibers is higher than that of its surroundings. The rear high basis weight region 71 is provided in the rear region M3. As shown in Fig. 3, the absorbent core 7 has a gap 75 in the low stiffness region where only the low basis weight region 73 and the grooves 10 are present, between the region where the rear high basis weight region 71 is located and the region where the front high basis weight region 72 is located in the longitudinal direction X. When worn, the front high basis weight region 72 is positioned opposite the excretory area (vaginal opening), and the rear high basis weight region 71 is positioned opposite the intergluteal cleft, and the gap 75 in the low stiffness region allows the napkin 1 to easily deform along the shape of the body to wrap around the buttocks in the longitudinal direction.

[0051] The absorbent core 7 has multiple longitudinal grooves 10x, multiple lateral grooves 10y, multiple front high basis weight blocks 72a, multiple rear high basis weight blocks 71a, and multiple low basis weight blocks 73a, each defined by a front circumferential groove 10a and a rear circumferential groove 10b. When there is no need to distinguish between the longitudinal grooves 10x, the lateral grooves 10y, the front circumferential grooves 10a, and the rear circumferential grooves 10b, they are referred to as grooves 10. As shown in FIG. 4, the grooves 10 are formed as recesses extending downward from the upper surface of the absorbent core 7 in the thickness direction Z. The grooves 10 have a lower basis weight of constituent fibers and are typically thinner than the blocks 71a, 72a, and 73a. This allows the absorbent core 7 to flexibly deform from the grooves 10, which act as the starting point for deformation.

[0052] The "low basis weight" of the grooves 10 is a concept that includes not only a configuration in which the constituent fibers of the absorbent core 7 are present, but also a configuration in which the constituent fibers are absent. The configuration in which the constituent fibers are present in the grooves 10 is more preferable because the block-shaped portions of the absorbent core 7 located on both sides thereof are connected via the grooves, thereby imparting flexibility while suppressing deformation and breakage of the absorbent core 7.

[0053] The rear high basis weight region 71 is formed by a plurality of (two in this embodiment) rear high basis weight blocks 71a, and its outer shape in plan view is formed by the rear circumferential groove portion 10b. The front high basis weight region 72 is formed by a plurality of (14 in this embodiment) front high basis weight blocks 72a, and its outline in plan view is formed by the front circumferential groove portion 10a. The low basis weight region 73 is formed by a plurality of (54 in this embodiment) low basis weight blocks 73a.

[0054] The rear high basis weight blocks 71a and the front high basis weight blocks 72a are more rigid than the low basis weight blocks 73a. In the absorbent core 7, the provision of the high-rigidity front high basis weight region 72 facing the excretory area makes the middle region M2 of the main body M less susceptible to unintended deformation, thereby maintaining good liquid absorption of liquid from the excretory area and increasing the amount of liquid that can be absorbed. Furthermore, the provision of the high-rigidity rear high basis weight region 71 facing the gluteal cleft makes the rear region M3 of the main body M less susceptible to unintended deformation, maintaining good liquid absorption of liquid flowing toward the rear of the napkin 1 and increasing the amount of liquid that can be absorbed. Typically, the high basis weight blocks are thicker than the low basis weight blocks and protrude upward. This allows the front high basis weight region 72 and the rear high basis weight region 71 to improve the fit of the napkin 1 around the excretory area and gluteal cleft, effectively preventing liquid leakage.

[0055] In Figure 3, the rear high basis weight block 71a and the front high basis weight block 72a, which have relatively high basis weights, are shown with dense dots, the low basis weight block 73a, which has a low basis weight, is shown with sparse dots, and the groove portion 10, which has an even lower basis weight, is shown as a solid color without any pattern such as dots.

[0056] (Positional relationship between the front high basis weight region of the absorbent core and the spaced portion) From the perspective of further improving the standability of the standing gathers G while maintaining good liquid absorbency, it is preferable that the separation portion 35 is located outboard in the longitudinal direction X of the front high basis weight region 72, as shown in Figure 2. In other words, it is preferable that the separation portion 35 is located rearward of the front high basis weight region 72, and that the front high basis weight region 72 is not located in the adhesive-free region 36. By giving the front high basis weight region 72, which is located opposite the excretory area when worn, a high basis weight and high rigidity can be achieved, thereby suppressing shrinkage of the front high basis weight region 72 due to contraction of the elastic members 14, and maintaining good liquid absorbency. Furthermore, by not positioning the front high basis weight region 72 in the adhesive-free region 36, the absorbent body 4 corresponding to the adhesive-free region 36 of the napkin 1 can be more effectively pulled in by the contractile force of the elastic members 14, thereby further improving the standability of the standing gathers G.

[0057] (Positional relationship between the rear high basis weight region of the absorbent core and the spaced portion) 2 and 3, from the viewpoint of suppressing undesirable deformation of the region of the napkin 1 corresponding to the separation portion 35, it is preferable that the absorbent body 4 has a high-rigidity region in the region overlapping with the separation portion 35 in the longitudinal direction X. In the napkin 1 of this embodiment, the high-rigidity region is constituted by a rear high-basis weight region 71. A gap 75 exists between the rear high-basis weight region 71 and the front high-basis weight region 72, and the rear high-basis weight region 71 is positioned independently from the front high-basis weight region 72.

[0058] In the napkin 1, the area corresponding to the separation portion 35 has low rigidity due to the absence of an adhesive portion, but the rigidity can be increased by providing the rear high basis weight area 71. With this configuration, undesirable deformation of the area corresponding to the separation portion 35 of the napkin 1 is less likely to occur, deformation such as displacement of the rear end portion G1a is less likely to occur, and the standing of the three-dimensional gathers G due to such deformation is less likely to be hindered, thereby further improving the standing ability of the three-dimensional gathers G.

[0059] The rear high basis weight region 71, which provides a high rigidity region to the absorbent body 4, is preferably located at the cross intersection of the cross-shaped adhesive-free region formed by a pair of front adhesive regions 31 and a pair of rear adhesive regions 32. In the napkin 1, the cross-shaped adhesive-free region formed by a pair of front adhesive regions 31 and a pair of rear adhesive regions 32 has lower rigidity than the region where adhesive regions are present when the napkin 1 is secured to underwear, and is therefore more susceptible to deformation. In the napkin 1, the cross intersection of the cross-shaped adhesive-free region is susceptible to deformation of both the region corresponding to the horizontal line portion of the cross and the region corresponding to the vertical line portion of the cross, and is therefore particularly susceptible to undesirable deformation such as crease. In the napkin 1 of this embodiment, the rear high basis weight region 71 is located at the cross intersection where undesirable deformation of the cross-shaped adhesive-free region is particularly likely to occur, thereby effectively suppressing undesirable deformation in the region corresponding to the separation portion 35 of the main body M.

[0060] [Round compression groove, horizontal compression groove] As shown in Figures 1 and 2, the topsheet 2 may be formed with round compressed grooves 6, second horizontal compressed grooves 12, and third horizontal compressed grooves 13. As shown in Figure 4, these compressed grooves are configured as linear grooves formed by integrally compressing the topsheet 2 through the absorbent core 4 and recessing them toward the backsheet 3. In plan view, the second horizontal compressed grooves 12 and the third horizontal compressed grooves 13 are located within an area surrounded by the round compressed grooves 6 that are configured to circumferentially surround the main body M. As shown in Figure 2, the round compressed grooves 6, the second horizontal compressed grooves 12, and the third horizontal compressed grooves 13 are formed in an area on the skin side (upper surface) of the topsheet 2 that is not covered by the side sheet 5, and are located within an area sandwiched between a pair of three-dimensional gathers G.

[0061] The term "linear groove" includes both a continuous compressed groove that extends linearly and a plurality of compressed portions that are arranged intermittently and can be viewed as a single linear groove as a whole. Regarding linear grooves, "extending in the longitudinal direction X" or "extending in the transverse direction Y" means that the linear grooves extend in the longitudinal direction X or transverse direction Y as a whole, and also includes partially curved grooves. Compressed grooves are compacted by compression, forming high-rigidity regions that are more rigid than uncompressed regions. Because the compressed grooves have a high fiber density, they draw in and retain liquid through capillary action. This prevents liquid from diffusing outside the compressed grooves, providing a leak-proof function.

[0062] As shown in Figure 2, the round compressed groove 6 has a pair of left and right vertical compressed grooves 61 extending in the vertical direction X, and a front horizontal compressed groove 62 and a rear horizontal compressed groove 63 extending in the horizontal direction Y. The pair of vertical compressed grooves 61 are provided over substantially the entire length of the main body M, from the front region M1 of the main body M, through the middle region M2, to the rear region M3. The front horizontal compressed groove 62 connects the front ends of the pair of vertical compressed grooves 61. The rear horizontal compressed groove 63, which serves as a first horizontal compressed groove, connects the rear ends of the pair of vertical compressed grooves 61.

[0063] The front lateral compressed groove 62 extends in the front region M1 in the lateral direction Y. The front lateral compressed groove 62 is located forward of the front high basis weight region 72 provided in the absorbent core 7, and has a shape in which two forward-convex arc-shaped portions are connected in the lateral direction Y.

[0064] The rear lateral compressed groove 63 extends in the lateral direction Y in the rear region M3. In a plan view, the rear lateral compressed groove 63 is located rearward of the rear high basis weight region 71 provided in the absorbent core 7. The rear lateral compressed groove 63 has a shape in which two rearwardly convex arc-shaped portions are connected in the lateral direction Y. Of these two arc-shaped portions, a rough portion of the left arc-shaped portion overlaps with the rear adhesive portion 32 located on the left, and a rough portion of the right arc-shaped portion overlaps with the rear adhesive portion 32 located on the right, so that the rear lateral compressed groove 63 overlaps with the pair of rear adhesive portions 32 on both sides in the lateral direction Y. The portion where the two arc-shaped portions are connected, i.e., the center in the lateral direction Y of the rear lateral compressed groove 63, is located in an area where no adhesive portion exists between the right-side rear adhesive portion 32 and the left-side rear adhesive portion 32, so that the rear lateral compressed groove 63 does not overlap with the rear adhesive portion 32 at the center in the lateral direction Y.

[0065] The second horizontal compressed groove 12 is located forward of the rear horizontal compressed groove 63 serving as the first horizontal compressed groove. The second horizontal compressed groove 12 is not connected to the round compressed groove 6 and is provided in a shape independent of the round compressed groove 6. The second horizontal compressed groove 12 is located rearward of the rear high basis weight region 71 and has an arc shape that convex rearward in plan view, which roughly follows the arc shape of the rear end edge of the rear high basis weight region 71. The second horizontal compressed groove 12 extends in the horizontal direction Y in the rear region M3. More strictly, the second horizontal compressed groove 12 extends near both ends roughly along the longitudinal direction X and near the center in the horizontal direction Y. In the vertical direction X, a front portion of the second horizontal compressed groove 12 roughly corresponding to the vicinity of both ends extending roughly along the longitudinal direction X overlaps with the adhesive-free region 36, and a rear portion roughly corresponding to the vicinity of the center extending in the horizontal direction Y overlaps with the rear adhesive portion 32. The second horizontal compressed groove 12 extends in the horizontal direction Y across the pair of rear adhesive portions 32. In other words, the second horizontal compressed groove 12 overlaps with the pair of rear adhesive portions 32 on both sides in the horizontal direction Y, but does not overlap with the pair of rear adhesive portions 32 in the center in the horizontal direction Y.

[0066] The third lateral compressed groove 13 extends in the lateral direction Y in the rear region M3. As shown in FIG. 2 , the third lateral compressed groove 13 is located forward of the second lateral compressed groove 12. A rear high basis weight region 71 is located between the second lateral compressed groove 12 and the third lateral compressed groove 13. The third lateral compressed groove 13 is located rearward of the front high basis weight region 72 and has an arc shape that convex rearward in plan view, which roughly follows the arc shape of the rear edge of the front high basis weight region 72. The third lateral compressed groove 13 overlaps the pair of front adhesive portions 31 and is not located in the adhesive-free region 36. The third lateral compressed groove 13 extends in the lateral direction Y, straddling the pair of front adhesive portions 31. In other words, the third lateral compressed groove 13 overlaps the pair of front adhesive portions 31 on both sides in the lateral direction Y, but does not overlap at the center in the lateral direction Y.

[0067] (Positional relationship between the rear horizontal compression groove and the second horizontal compression groove and the rear adhesive portion) In the napkin 1, horizontal compressed grooves overlapping with the rear adhesive portions 32 are preferably provided in the region sandwiched between the pair of rear fastening regions G3 (in the region sandwiched between the rear fastening regions G3 of the pair of standing gathers).

[0068] In the napkin 1 of this embodiment, a rear horizontal compressed groove 63 is provided as a first horizontal compressed groove that constitutes part of the round compressed groove 6 and that overlaps with the rear adhesive portion 32. In the region of the napkin 1 where the rear horizontal compressed groove 63 is provided, overlapping regions are located on both sides in the horizontal direction Y where the rear horizontal compressed groove 63 and the rear adhesive portion 32 overlap, and a non-overlapping region is located in the center in the horizontal direction Y where the horizontal compressed groove and the rear adhesive portion 32 do not overlap. The overlapping regions have higher rigidity than the non-overlapping regions when the napkin 1 is secured to underwear.

[0069] With the above configuration, when an external force acts from the outside toward the inside in the horizontal direction Y near the area of ​​the napkin 1 where the rear horizontal compressed grooves 63 are provided, the highly rigid overlapping area generates resistance to the external force, and the low-rigidity non-overlapping area is more likely to induce a convex deformation toward the wearer's body in the vertical direction X. This makes it possible to suppress the occurrence of oblique deformation, wrinkles, creases, and the like near the area of ​​the napkin 1 where the rear horizontal compressed grooves 63 are provided when worn. Therefore, deformation such as displacement of the rear end G1a of the standing region G1 located in the non-adhesive area 36 is less likely to occur, and the standing of the three-dimensional gathers G due to such deformation is less likely to be hindered, thereby further improving the standing ability of the three-dimensional gathers G.

[0070] In the napkin 1 of this embodiment, the rear horizontal compressed groove 63 has a shape that can be regarded as extending continuously in the horizontal direction Y across a pair of rear adhesive portions 32, but it may also have a shape that is interrupted at the center in the horizontal direction Y. In the rear adhesive portion 32, the two rearwardly convex arc-shaped portions may not be connected to each other and may have a shape that is interrupted at the center in the horizontal direction Y, as long as each arc-shaped portion is configured to overlap with each rear adhesive portion 32. Even in this configuration, it is possible to form an overlapping region where the horizontal compressed groove and the rear adhesive portion overlap, and a non-overlapping region where the horizontal compressed groove and the rear adhesive portion do not overlap. From the viewpoint of suppressing liquid leakage to the rear of the napkin 1, it is preferable that the rear horizontal compressed grooves 63 extend continuously in the horizontal direction Y across the pair of rear adhesive portions 32, as shown in FIG.

[0071] Furthermore, in the napkin 1 of this embodiment, as shown in Fig. 2, second horizontal compressed grooves 12 are provided in front of the rear horizontal compressed grooves 63 as horizontal compressed grooves that overlap with the rear adhesive portions 32. Like the rear horizontal compressed grooves 63, the second horizontal compressed grooves 12 are also located in the region sandwiched between the pair of rear fastening regions G3. The second horizontal compressed grooves 12 extend in the horizontal direction Y across the pair of rear adhesive portions 32. In the region where the second horizontal compressed grooves 12 are provided, like the region where the rear horizontal compressed grooves 63 are provided, overlapping regions where the second horizontal compressed grooves 12 and the rear adhesive portions 32 overlap are located on both sides in the horizontal direction Y, and a non-overlapping region where the second horizontal compressed grooves 12 and the rear adhesive portions 32 do not overlap is located in the center in the horizontal direction Y, which has lower rigidity than the overlapping regions when the napkin 1 is fastened to underwear.

[0072] In this way, in the napkin 1, two horizontal compressed grooves (the rear horizontal compressed groove 63 and the second horizontal compressed groove 12) are present in front and behind the rear adhesive portion 32 so as to overlap the rear adhesive portion 32, and in the region where the pair of rear adhesive portions 32 are provided, the occurrence of diagonal deformation, wrinkles, creases, etc. when the napkin is worn is more likely to be effectively suppressed. As a result, deformation such as displacement of the rear end portion G1a of the standing region G1 located in the adhesive-free region 36 is less likely to occur, and the standing ability of the three-dimensional gathers G can be further improved.

[0073] Furthermore, the napkin 1 is provided with vertical compressed grooves 61 that extend continuously in the longitudinal direction X in the rear region M3 including the adhesive-free region 36. The vertical compressed grooves 61 impart a high-rigidity region to the adhesive-free region 36, which has low rigidity due to the absence of adhesive, and this makes it easier to prevent undesirable deformation such as wrinkles and creases in the adhesive-free region 36, thereby further stabilizing the position of the rear end G1a. Furthermore, because the rear horizontal compressed grooves 63 and the vertical compressed grooves 61 are connected, the compressed grooves can effectively prevent liquid leakage to the outside of the napkin 1, and when worn, in the region near the rear edge of the napkin 1, the rear horizontal compressed grooves 63 and the vertical compressed grooves 61 act as deformation start points, allowing the napkin 1 to easily deform to encase the buttocks, improving the fit and preventing liquid leakage.

[0074] (Positional relationship between the third horizontal compression groove and the rear adhesive part) In the napkin 1, it is preferable that a third lateral compressed groove 13 extending in the lateral direction Y is provided behind the front high basis weight region 72 and in front of the spaced portion 35. In the napkin 1, a low basis weight region 73, which is a low-rigidity region, is located between the front high basis weight region 72 and the separation portion 35. By providing third horizontal compressed grooves 13 extending in the horizontal direction Y in this low-rigidity region, the third horizontal compressed grooves 13 become bending points, making it easier for the napkin 1 to bend with the skin-facing side facing inward, and making it easier for the standing regions G1 of the three-dimensional gathers G, which are located at positions overlapping the adhesive-free regions 36 in the vertical direction X, to stand up.

[0075] [Position of the separation section at the rear] In the napkin 1, the separation portion 35 may overlap the first region 21. When the napkin is worn, the first region 21 corresponds to a region where the underwear is subject to significant deformation due to the wearer's walking and other movements. By providing the separation portion 35 (adhesive-free region 36) in such a region where the underwear is subject to significant deformation, it is possible to prevent the rear end G1a of the standing region G1 from shifting position due to deformation of the underwear, and the particularly strong stretching force of the three-dimensional gathers G near the rear end G1a can be fully exerted, improving the standing ability of the three-dimensional gathers G. Furthermore, as shown in FIG. 2, in the region of the absorbent body 4 corresponding to the adhesive-free region 36, both sides of the absorbent body 4 in the lateral direction Y near the rear end G1a are low-basis-weight regions with less absorbent material and low rigidity, which makes it easier for the absorbent body 4 to be pulled in by the contractile force of the elastic member 14, further improving the standing ability of the three-dimensional gathers G.

[0076] [Example dimensions for adhesive part] The dimensions of each adhesive portion can be set as appropriate depending on the overall length of the napkin 1, but the numerical ranges described below are preferred for napkins with an overall length of 290 mm to 450 mm. In the napkin 1 of this embodiment, the maximum width of the pair of wings W and the maximum width of the pair of hip guards H are the same, and these correspond to the width of the napkin 1. Hereinafter, the length in the vertical direction X will be referred to as the "vertical width," and the length in the horizontal direction Y will be referred to as the "horizontal width."

[0077] The vertical width of the front adhesive portion 31 is preferably 150 mm to 210 mm, and the horizontal width is preferably 10 mm to 30 mm. The distance between the pair of front adhesive portions 31 in the horizontal direction Y is preferably 5 mm to 20 mm, and is 10 mm in the case of the napkin 1. The rear end 31a of the front adhesive portion 31, which determines the front position of the separation portion 35, is preferably located 30 mm to 125 mm rearward from the excretion point. The excretion point is the center of the length of the wing W in the vertical direction X. The vertical width of the front adhesive portion 31 located in the rear region M3 is preferably 10 mm to 85 mm, and is 40 mm in the case of the napkin 1, in order to ensure a good liquid absorption capacity and to position the separation portion 35 near the anus.

[0078] The distance in the vertical direction X between the rear end 31a of the front adhesive portion 31 and the front end 32a of the rear adhesive portion 32, i.e., the vertical width of the separation portion 35, is 25 mm or more and 35 mm or less, and is 30 mm in the case of the napkin 1, from the viewpoint of effectively reducing the force acting on the hip guard adhesive portion 34 due to the deformation of the napkin 1 that follows the deformation of the underwear during the wearer's movements.

[0079] The vertical width of the rear adhesive portion 32 is preferably 10 mm or more and 45 mm or less, and is 27 mm in the case of the napkin 1, and the horizontal width is preferably 10 mm or more and 30 mm or less, and is 20 mm in the case of the napkin 1. The distance between the pair of rear adhesive portions 32 in the horizontal direction Y is preferably 5 mm or more and 20 mm or less, and is 10 mm in the case of the napkin 1.

[0080] <Other embodiments>

[0081] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Other embodiments will be described below using Figures 6(A) and 6(B) as appropriate. In these figures, the wing adhesive portions, hip guard adhesive portions, compressed grooves, and absorbent body are not shown, and the same components as in the above-described embodiments are denoted by the same reference numerals.

[0082] In the above-described napkin 1, an example was given in which the rear end G1a of the standing region G1 is located in the adhesive-free region 36, but the rear end G1a may also be located more inward in the vertical direction X than the adhesive-free region 36, in other words, more forward than the adhesive-free region 36. With this configuration, when the wearer is lying on his back, such as when sleeping, the area of ​​the napkin that is fixed to the underwear by the rear adhesive portion 32 is less likely to move due to the pressure between the wearer and the bedding, but the presence of the separation portion 35 makes it easier for the back sheet 3 and the absorbent body 4 fixed to it to be pulled in the direction of the rear end G1a of the standing region G1, that is, forward, thereby improving the standing ability of the rear of the standing portion 51, which in turn improves the standing ability of the standing region G1 and makes it easier to maintain a stable standing state of the standing region G1.

[0083] Furthermore, in the napkin 1 described above, an example was given in which the separation portion between the pair of front adhesive portions and the pair of rear adhesive portions is located in the rear region M3. However, as in the napkin 1A shown in FIG. 6(A), an adhesive-free region 36 (separation portion 35) may be located in the front region M1. In the napkin 1A, the front adhesive portion 31 and the rear adhesive portion 32 both extend continuously in the longitudinal direction X, and the dimension along the longitudinal direction X of the front adhesive portion 31 is short, while the dimension along the longitudinal direction X of the rear adhesive portion 32 is long. In the napkin 1A, the front adhesive portion 31 is provided only in the front region M1. The rear adhesive portion 32 is provided across the front region M1, the middle region M2, and the rear region M3. Although not shown in the drawings, in the napkin 1A, the separation portion 35 is located outward in the longitudinal direction X from the front high basis weight region 72. In other words, the separation portion 35 is located forward of the front high basis weight region 72.

[0084] In the napkin 1A, the separation portion 35 is provided toward the rear of the front region M1, and the front end G1b of the standing region G1 is located within the non-adhesive region 36. With this configuration, the non-adhesive region 36 of the napkin 1A is not fixed to the underwear, so that the particularly strong stretching force of the three-dimensional gathers G near the front end G1b can be fully exerted, improving the standing ability of the standable portion 51, which in turn improves the standing ability of the standing region G1, making it easier to maintain the standing state of the standing region G1 stably.

[0085] Furthermore, in the napkin 1A, the region where the separation portion 35 is provided is a location that is likely to deform in response to deformation of the underwear caused by, for example, the wearer's movements when lying face down while sleeping, or when rolling over to a supine position. By providing the adhesive-free region 36 in a region where the napkin is likely to deform in response to such deformation of the underwear, deformation of the underwear caused by the wearer's movements is less likely to be transmitted to the napkin 1, deformation such as displacement of the front end G1b is suppressed, stretching force near the front end G1b can be fully exerted, improving the standability of the standable portion 51, which in turn improves the standability of the standable region G1, making it easier to maintain the standable region G1 in a stable stand state.

[0086] In the above-described napkin 1A, an example was given in which the front end G1b of the standing region G1 is located in the adhesive-free region 36, but the front end G1b may also be located inward in the vertical direction X from the adhesive-free region 36, in other words, behind the adhesive-free region 36. With this configuration, when the wearer is in a prone position, the area of ​​the napkin that is fixed to the underwear by the front adhesive portion 31 is less likely to move due to the pressure between the wearer and the bedding, but the presence of the separation portion 35 makes it easier for the back sheet 3 and the absorbent body 4 fixed to it to be pulled in the direction of the front end G1b, i.e., toward the rear, improving the standing ability of the standable portion 51, which in turn improves the standing ability of the standing region G1, making it easier to maintain a stable standing state of the standing region G1.

[0087] 6(B), a front adhesive-free region 36b and a rear adhesive-free region 36a may be provided in both the front region M1 and the rear region M3, respectively. In the napkin 1B, a pair of left and right front adhesive regions 131, a pair of left and right intermediate adhesive regions 132, and a pair of left and right rear adhesive regions 133 are provided on the underwear-contacting surface of the main body M. The intermediate adhesive portion 132 is located behind the front adhesive portion 131, with the front spaced portion 35b, where no adhesive portion is located, interposed therebetween. When viewed from the front spaced portion 35b, the front adhesive portion 131 corresponds to the first adhesive portion, and the intermediate adhesive portion 132 corresponds to the second adhesive portion. The rear adhesive portion 133 is located behind the intermediate adhesive portion 132, with the rear separation portion 35a, where no adhesive portion is located, interposed therebetween. When viewed from the rear separation portion 35a, the intermediate adhesive portion 132 corresponds to the first adhesive portion, and the rear adhesive portion 133 corresponds to the second adhesive portion. The front end G1b of the standing region G1 is located in the front adhesive-free region 36b where no adhesive portion exists across the entire width in the horizontal direction Y, including the front separation portion 35b, and the rear end G1a is located in the rear adhesive-free region 36a where no adhesive portion exists across the entire width in the horizontal direction Y, including the rear separation portion 35a. By adopting such a configuration, the standing ability of the standing-up portions 51 on the front and rear sides of the standing-up area G1 is improved, which in turn improves the standing ability of the standing-up area G1, making it easier to maintain a stable standing state of the standing-up area G1.

[0088] Furthermore, the absorbent article to which the present invention can be applied is not limited to sanitary napkins. Specifically, the present invention can be applied to pad-type absorbent articles similar to sanitary napkins, such as urine absorption pads and panty liners. [Explanation of symbols]

[0089] 1, 1A, 1B... Napkins (absorbent articles) 2...Surface sheet 3...Back sheet 3a…Underwear contact surface 4...Absorbent 14...Elastic member 31…Front adhesive part (first adhesive part) 32... Rear adhesive part (second adhesive part) 35…Separation part 35a...Rear separation part (separation part) 35b...Front separation part (separation part) 36…Adhesive part absent area 36a...Rear adhesive part absent area (adhesive part absent area) 36b...Front adhesive part absent area (adhesive part absent area) 131…Front adhesive part (first adhesive part) 132…Intermediate adhesive part (second adhesive part, first adhesive part) 133…Rear adhesive part (second adhesive part) G...three-dimensional ギャザー G1…Standing Field G2…Fixed area ahead G3…Rear fixed area G1a… rear end G1b…front end M…body M1…frontier M2…Middle area M3…rear area X...direction (front and back direction) Y...horizontal direction (left and right direction)

Claims

1. An absorbent article comprising a main body extending in a longitudinal direction corresponding to the front-to-rear direction of a wearer, divided into a front region, a middle region having an excretory region-facing region, and a rear region, and having a lateral direction corresponding to the left-to-right direction of the wearer, the main body having a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet, The body includes: a pair of first adhesive portions extending in the vertical direction and located on both sides in the horizontal direction, the pair of second adhesive portions extending in the vertical direction and located on both sides in the horizontal direction, the pair of first adhesive portions being separated by a space where no adhesive portion is located; a pair of three-dimensional gathers extending longitudinally along both lateral sides of the main body; Equipped with the main body has the spaced portion in the front region and / or the rear region, The three-dimensional gathers have a configuration in which an elastic member stretchable in the vertical direction is disposed on a sheet member, The three-dimensional gathers are a vertically extending standing region that can stand up toward the wearer's skin at least in the intermediate region; a front fixing region located forward of the standing region and fixed to the top sheet; a rear fixing region located rearward of the standing region and fixed to the top sheet; Has, a front end of the standing region is located in the front region, and a rear end of the standing region is located in the rear region; At least one of the front end portion and the rear end portion is located in an adhesive-free region including at least a part of the spaced portion, where no adhesive portion exists across the entire width of the absorbent article in the lateral direction, or is located inward in the longitudinal direction from the adhesive-free region. Absorbent articles.

2. The absorbent article according to claim 1, the spaced portion and the pair of second adhesive portions are located in the rear region, the main body has a first horizontal compressed groove in which the topsheet and the absorbent body are compressed together in a region sandwiched by the rear fixing regions of each of the pair of standing gathers, The first horizontal compressed groove extends in the horizontal direction and overlaps with the second adhesive portion. Absorbent articles.

3. The absorbent article according to claim 2, the main body has second horizontal compressed grooves located forward of the first horizontal compressed grooves in a region sandwiched between the rear fixing regions of the pair of three-dimensional gathers, the second horizontal compressed grooves being formed by compressing the topsheet and the absorbent body together; The second horizontal compressed groove extends in the horizontal direction across the pair of second adhesive portions. Absorbent articles.

4. The absorbent article according to claim 1 or 2, The absorbent body has a high basis weight region extending from the intermediate region to the rear region, the high basis weight region having a higher basis weight of the absorbent body material than the surrounding area, In a plan view, the spaced portion is located outward in the longitudinal direction from the high basis weight region. Absorbent articles.

5. The absorbent article according to claim 4, the spaced apart portion is located in the rear region, The main body has a third lateral compression groove extending laterally, behind the high basis weight region and in front of the spaced portion, where the topsheet and the absorbent body are integrally compressed. Absorbent articles.

6. The absorbent article according to claim 1 or 2, a pair of wings extending laterally outward from the intermediate region; A pair of hip guards extending laterally outward from the rear region; Further provided with a rear portion of the absorbent article that overlaps the rear region in the longitudinal direction has a first region whose horizontal length increases from the front to the rear, and a second region that is located rearward of the first region and whose horizontal length decreases from a position where the horizontal length is maximum toward the rear, The spaced portion overlaps with the first region. Absorbent articles.

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