Absorbent article

Abstract

To provide an absorbent article that suppresses leakage of a discharged liquid discharged by a wearer.SOLUTION: An absorbent article includes: an absorbent having an absorbent mat and a first water-permeable sheet disposed on a skin surface side of a wearer of the absorbent mat; a compressed groove formed by compressing the skin surface side of the absorbent; a first high liquid permeability portion that is provided in the first water-permeable sheet at a portion overlapping the compressed groove and through which a liquid passes to the absorbent mat side more easily than the other portions of the first water-permeable sheet; and one or a plurality of second water-permeable sheets adhering to the skin surface side of the first water-permeable sheet.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] Absorbent articles such as disposable diapers, absorbent pads, and sanitary products have been developed. The absorbent articles include an absorbent body that absorbs liquids such as urine excreted by the wearer. For example, Patent Document 1 discloses an absorbent article that includes compressed grooves formed by compression. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-103782 Summary of the Invention [Problem to be solved by the invention]

[0004] Compressed grooves are often formed for the purpose of spreading excreted liquids such as urine excreted by the wearer throughout the entire absorbent body, thereby enabling the entire absorbent body to efficiently absorb the excreted liquid, etc. However, if excreted liquid such as urine flows out to the ends of the compressed grooves, there is a risk that the excreted liquid will reach the ends of the absorbent article and leak out of the absorbent article.

[0005] An object of the present invention is to provide an absorbent article that suppresses leakage of fluid excreted by the wearer. [Means for solving the problem]

[0006] An absorbent article according to one aspect of the present invention comprises: an absorbent body having an absorbent mat and a first water-permeable sheet arranged on the wearer's skin side of the absorbent mat; a compression groove formed by compressing the skin-facing side of the absorbent body; a first highly liquid-permeable portion provided in the first water-permeable sheet at a portion overlapping the compression groove, through which liquid passes more easily toward the absorbent mat than in other portions of the first water-permeable sheet; One or more second water-permeable sheets adhered to the skin side of the first water-permeable sheet; Equipped with. [Effects of the Invention]

[0007] The present invention can suppress leakage of fluid excreted by the wearer. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the appearance of a diaper according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the diaper according to the embodiment. [Figure 3] FIG. 3 is a plan view of the diaper according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of a diaper according to an embodiment. [Figure 5] FIG. 5 is a diagram showing compressed grooves provided in a diaper according to an embodiment. [Figure 6] FIG. 6 is an enlarged view of a compressed groove provided in a diaper according to an embodiment. [Figure 7] FIG. 7 is a plan view (part 1) showing an adhesive pattern to be applied to the skin-facing side of the upper-layer core wrap sheet provided in the diaper according to the embodiment. [Figure 8] FIG. 8 is a plan view showing a tear occurring in a compressed groove provided in a diaper according to an embodiment. [Figure 9] FIG. 9 is a diagram showing the relationship between the stretch direction of the top sheet and the fiber orientation direction of the upper core wrap sheet of the diaper according to the embodiment. [Figure 10] FIG. 10 is a plan view (part 2) showing the adhesive pattern of the adhesive to be applied to the skin-facing side of the upper-layer core wrap sheet provided in the diaper according to the embodiment. [Figure 11]FIG. 11 is a plan view (part 3) showing the adhesive pattern of the adhesive to be applied to the skin-facing side of the upper-layer core wrap sheet provided in the diaper according to the embodiment. [Figure 12] FIG. 12 is a diagram showing the shape of compressed grooves provided in the diaper according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention. The embodiments described below are merely aspects of the present invention and are not intended to limit the technical scope of the present invention.

[0010] <Embodiment> In this embodiment, the longitudinal direction of a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as "diaper") is the direction connecting the front body portion, which is positioned opposite the wearer's abdomen, and the back body portion, which is positioned opposite the wearer's back. Between the front body portion (one side in the longitudinal direction) and the back body portion (the other side in the longitudinal direction) (the center in the longitudinal direction), a crotch portion, which is positioned between the wearer's crotch (facing the crotch), is located. Furthermore, when the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is the skin-facing side, and the side opposite the skin-facing side (the outer side when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. Furthermore, a view from the thickness direction is a planar view. The left-right direction of the diaper is defined as the right side of the wearer's right hand and the left side of the wearer's left hand when the diaper is worn.

[0011] FIG. 1 is a perspective view of a diaper 1 according to this embodiment. FIG. 2 is an exploded perspective view of the diaper 1 according to this embodiment. FIG. 3 is a plan view of the diaper 1 in a stretched state, viewed from the skin-facing side. The diaper 1 has a crotch region 1B, which corresponds to the crotch area of ​​the wearer and covers the genitals when worn; a front body region 1F, which is located in front of the crotch region 1B and corresponds to the front body of the wearer; and a back body region 1R, which is located behind the crotch region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R are attached to the left and right edges of the back body region 1R, and can be attached to front patches 2F, which are provided on the non-skin-facing side of the front body region 1F. When the front body region 1F is positioned on the wearer's abdominal side and the back body region 1R is positioned on the wearer's back side, the tapes 2L and 2R are attached to the front patches 2F, and the diaper 1 is secured to the wearer's body, surrounding the wearer's abdominal circumference and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand and walk around while wearing the diaper 1.

[0012] The diaper 1 includes an absorbent body 6, which is capable of absorbing and retaining exudates discharged by the wearer, and is located mainly near the crotch region 1B. The diaper 1 also includes leg gathers 3AL, 3AR around the wearer's legs (thighs) to prevent gaps from forming between the diaper 1 and the wearer's skin, which could serve as a path for exudates to escape. Leakage barrier walls 3BL, 3BR are provided on the inside of the leg gathers 3AL, 3AR in the width direction of the diaper 1. The leg gathers 3AL, 3AR and the leakage barrier walls 3BL, 3BR adhere closely to the wearer's skin due to the elasticity of the elastic members. Therefore, exudates discharged from the wearer's genitals are absorbed by the absorbent body 6 of the diaper 1 without leaking out. The elastic members may be selected from thread-like or strip-like rubber, as appropriate.

[0013] The diaper 1 has a cover sheet 4 that forms the outer surface when worn. The cover sheet 4 has a substantially rectangular appearance with constrictions 4KL and 4KR at the portions corresponding to the long sides. The cover sheet 4 is a cylindrical member that forms the exterior surface of the diaper 1. The constrictions 4KL, 4KR are provided in the areas where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the back sheet 5 (described later) and to improve the feel. For example, to prevent leakage of excrement, a nonwoven fabric made of a liquid-impermeable thermoplastic resin can be used as its material. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, but may also be a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0014] The diaper 1 further comprises a back sheet 5, an absorbent body 6, and a top sheet 8 (an example of the "second water-permeable sheet" referred to in the present application), which are layered in this order on the wearer's skin-facing side of the cover sheet 4. The top sheet 8 may consist of a single sheet, or may be formed by layering multiple sheets. The back sheet 5, the absorbent body 6, and the top sheet 8 are all sheet-like members having a substantially rectangular appearance, and are layered in this order on the cover sheet 4 with their longitudinal directions aligned with the longitudinal direction of the cover sheet 4. The back sheet 5, like the cover sheet 4, is a sheet made of a liquid-impermeable thermoplastic resin material to prevent leakage of excrement. The back sheet 5 is preferably made of a moisture-permeable material to prevent stuffiness when worn.

[0015] The top sheet 8 is the portion that contacts the wearer's skin when the diaper 1 is worn. It is a stretchable, water-permeable sheet made of a liquid-permeable material that is stretchable and allows excreted liquids such as urine to pass through. The top sheet 8 may be made of a woven fabric, a nonwoven fabric, a porous film, or the like. The nonwoven fabric may be made of thermoplastic resin fibers such as polypropylene, polyethylene, polyester, or nylon that have been hydrophilically treated. Alternatively, air-through nonwoven fabric, point-bonded nonwoven fabric, spun-bonded nonwoven fabric, or melt-blown nonwoven fabric may be used. When the diaper 1 is worn, excreted liquid passes through the top sheet 8, which may come into contact with the wearer's skin, and enters the absorbent body 6, where it is absorbed. The longitudinal direction of the diaper 1 is the same as the longitudinal directions of the absorbent body 6 and the top sheet 8.

[0016] The back sheet 5, absorbent body 6, and top sheet 8 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4, in which the back sheet 5, absorbent body 6, and top sheet 8 are laminated, the longitudinal ends of the back sheet 5, absorbent body 6, and top sheet 8 are located on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6 from the ventral to dorsal sides of the wearer. Therefore, whether the wearer is in a ventral or dorsal position when excreting fluid, the fluid excreted by the wearer comes into contact with the absorbent body 6 via the top sheet 8.

[0017] The diaper 1 also includes elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR described above, which are provided between the cover sheet 4 and the back sheet 5 so as to be stretchable in the longitudinal direction of the diaper 1. The number of elastic members 4SL, 4SR (two in this embodiment) is determined based on the elastic force (contractile force) required for the design of the diaper 1. The elastic members 4SL, 4SR may not be provided.

[0018] The diaper 1 also has a pair of water-impermeable side sheets 9L, 9R arranged on both skin-facing sides of the diaper 1 in the width direction and extending longitudinally. The side sheets 9L, 9R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8. Like the cover sheet 4, the side sheets 9L, 9R have constrictions 9KL, 9KR in the areas where the wearer's thighs are located. The side sheets 9L, 9R have fixing regions 9AL, 9AR arranged on their outer sides in the width direction. The fixing regions 9AL, 9AR are bonded to the cover sheet 4 on the outer sides of the top sheet and top sheet 8, which are components arranged on the non-skin-facing sides, with a hot melt adhesive.

[0019] The side sheets 9L, 9R have rubber threads 9EL, 9ER arranged along their longitudinal direction to form the leak barrier walls 3BL, 3BR. When the diaper 1 is worn, i.e., when the diaper 1 is U-shaped in side view, the contractile force of the rubber threads 9EL, 9ER draws the side sheets 9L, 9R longitudinally and causes them to rise from the top sheet 8, thereby forming the leak barrier walls 3BL, 3BR that prevent the outflow of exuded liquid.

[0020] The side sheets 9L, 9R are bonded to the top sheet 8 with a hot melt adhesive. The widthwise inner ends of this hot melt adhesive form fold lines 3LL, 3LR (see FIG. 3), and the insides of the fold lines 3LL, 3LR form the upstanding leakage barrier walls 3BL, 3BR (see FIGS. 1 and 3). That is, the fold lines 3LL, 3LR are the upstanding ends of the leakage barrier walls 3BL, 3BR. The widthwise inner parts of the side sheets 9L, 9R are the leakage barrier walls 3BL, 3BR, and the widthwise inner ends of the side sheets 9L, 9R are the free ends 9BL, 9BR of the leakage barrier walls 3BL, 3BR. Near the free ends 9BL, 9BR of the side sheets 9L, 9R, two rubber threads 9EL, 9ER, which are thread-like elastic members, are provided side by side in the width direction. Note that one rubber thread 9EL, 9ER may also be provided. The elastic threads 9EL, 9ER are fixed to the side sheets 9L, 9R with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The side sheets 9L, 9R also have fixing portions 33L, 33R near their longitudinal ends. The fixing portions 33L, 33R are provided at the front and rear, and by fixing the side sheets 9L, 9R to the top sheet 8, they serve as longitudinal starting points for the leakage barrier walls 3BL, 3BR when they rise. The side sheets 9L, 9R are also bonded to the top sheet 8 on their outer widthwise sides, but on the inner longitudinal sides of the fixing portions 33L, 33R, the inner widthwise sides of the fixing portions are not bonded with the hot melt adhesive, allowing them to rise toward the skin. When the elastic threads 9EL, 9ER contract and the leakage barrier walls 3BL, 3BR inside the fold lines 3LL, 3LR rise toward the skin, the free ends 9BL, 9BR become the skin-facing tips. The upright leakage preventing walls 3BL, 3BR inhibit the movement of discharged liquid and loose stools outward in the width direction of the leakage preventing walls 3BL, 3BR, thereby suppressing lateral leakage of these.

[0021] FIG. 4 is a widthwise cross-sectional view of the diaper 1 taken along line AA in FIG. 3. The diaper 1 includes an absorbent body 6 that absorbs and retains excreted fluids such as urine. The absorbent body 6 is disposed on the non-skin-facing side of the top sheet 8, including the crotch region 1B, to absorb excreted fluids from the wearer. In this embodiment, the absorbent body 6 includes an absorbent core 6C (an example of the "absorbent mat" referred to in this application) and a core wrap sheet 7 that covers part or all of the absorbent core 6C. The longitudinal direction of the absorbent body 6 coincides with the longitudinal direction of the absorbent core 6C, the longitudinal direction of the core wrap sheet 7, and the longitudinal direction of the diaper 1.

[0022] In plan view, the absorbent core 6C has a generally gourd-like shape, with the front and back body regions 1F and 1R being wider than the crotch region 1B and the crotch region 1B being narrowed. The crotch region 1B is sandwiched between the wearer's legs, so it is subjected to compressive pressure inward in the width direction. Meanwhile, the front and back body regions 1F and 1R are subjected to pressure in the thickness direction of the absorbent core 6C due to the wearer's weight. To accommodate these pressures, the absorbent core 6C is narrowed in the crotch region 1B. In the front and back body regions 1F and 1R, the width of the absorbent core 6C is increased to increase the area on which the weight is applied, thereby preventing deformation in the thickness direction. For this reason, it is preferable that the absorbent core 6C be generally gourd-shaped. The absorbent core 6C may also be generally rectangular.

[0023] The absorbent core 6C is made of short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is placed in the gaps between the short fibers. These short fibers and SAP are examples of absorbent materials.

[0024] In this embodiment, SAP particles refer to a granulated resin composition containing SAP. The term "SAP-containing resin composition" as used herein encompasses both a composition consisting solely of SAP and a composition containing SAP as the main component, with other substances added to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives (such as surface modifiers added to hydrophobize the particle surface) and unreacted monomers remaining during the synthesis of SAP. SAP particles can absorb approximately 10 to 100 times their own weight in liquid. The SAP particles may be, for example, granular particles with a diameter of approximately 0.1 to 0.5 mm before absorbing liquid.

[0025] While SAP particles gel and can retain liquid, it takes a certain amount of time to absorb the liquid. In the diaper 1, the short fibers slow down the discharged liquid and diffuse it within the absorbent core 6C until the SAP particles have absorbed the liquid, allowing the discharged liquid to be absorbed by a wide range of SAP particles, thereby preventing the liquid from flowing back. The absorbent core 6C may be composed of two mat layers, and may have, for example, an upper absorbent mat positioned on the top sheet 8 side and a lower absorbent mat positioned on the side facing away from the wearer's skin.

[0026] The core wrap sheet 7 is a water-permeable sheet that wraps the absorbent core 6C, and more specifically, it covers the skin-facing side, side surfaces, and non-skin-facing side of the absorbent core 6C. The core wrap sheet 7 maintains the shape of the absorbent core 6C when not in contact with excreted liquid, preventing it from losing its shape and preventing the SAP particles contained in the absorbent core 6C from escaping. Furthermore, SAP particles when not absorbing moisture are hard and sand-like, and if these SAP particles escape from the absorbent body 6 and come into direct contact with the wearer's skin, they may cause discomfort to the wearer. For this reason, the absorbent core 6C is sandwiched between the core wrap sheets 7, preventing the absorbent core 6C from losing its shape and preventing the SAP particles from escaping outside the absorbent body 6.

[0027] In this embodiment, the core wrap sheet 7 is made of a pulp fiber sheet or a thin nonwoven fabric. The core wrap sheet 7 is formed of two sheets: an upper-layer core wrap sheet 7A (an example of the "first water-permeable sheet" referred to in this application) that is placed between the absorbent core 6C and the top sheet 8, and a lower-layer core wrap sheet 7B that is placed on the non-skin-facing side of the absorbent core 6C. The upper-layer core wrap sheet 7A and the lower-layer core wrap sheet 7B of the core wrap sheet 7 are formed from the same material. However, the upper-layer core wrap sheet 7A and the lower-layer core wrap sheet 7B may also be formed from different materials. As an example, the upper-layer core wrap sheet 7A can be an air-through nonwoven fabric, and the lower-layer core wrap sheet 7B can be tissue paper.

[0028] In this embodiment, the core wrap sheet 7 is arranged to cover the skin-facing side, side surfaces, and non-skin-facing side of the absorbent core 6C. As shown in Fig. 4, the lower core wrap sheet 7B is arranged on the non-skin-facing side of the absorbent core 6C, covers the side surfaces of the absorbent core 6C, and is also arranged to cover the outer widthwise sides of the upper core wrap sheet 7A. Here, the upper core wrap sheet 7A and the lower core wrap sheet 7B are laminated on both widthwise sides of the skin-facing side of the absorbent core 6C, and the core wrap sheet 7 in this portion is double-layered.

[0029] The absorbent body 6 of the diaper 1 according to this embodiment has grooves 20 (an example of the "compressed grooves" referred to in this application) formed by compressing the skin-facing side of the absorbent body 6. Fig. 5 is a plan view of the diaper 1 showing the grooves 20. For ease of explanation, some components are not shown. The grooves 20 in this embodiment are composed of a plurality of grooves, including grooves 20A and grooves 20B that intersect with each other, as shown in Fig. 5.

[0030] As shown in FIG. 5 , the groove 20A extends linearly from the front left side to the rear right side of the diaper 1, and the groove 20B extends linearly from the front right side to the rear left side of the diaper 1. The grooves 20A and 20B have uniform depths and widths throughout their extension directions. A plurality of the grooves 20A extend parallel to one another, and a plurality of the grooves 20B extend parallel to one another, forming a grid-like arrangement diagonal to the long or short sides of the absorbent body 6. The extension directions of the grooves 20A and 20B are not limited to the exemplary configuration shown in FIG. 5 . For example, the groove 20A may extend along the longitudinal direction of the diaper 1, and the grooves 20B may extend along the width direction of the diaper 1. The grooves 20A and 20B may also be formed in a grid-like arrangement parallel to the long or short sides of the absorbent body 6.

[0031] Figure 6(A) is a diagram showing the circular region A shown in Figure 5, and Figure 6(B) is a cross-sectional view of the top sheet 8 and absorbent body 6 taken along line BB in Figure 6(A). Figure 6(B) shows the cross-sectional structure of the area where groove 20A intersects with groove 20B. Note that Figure 6(B) does not show the lower core wrap sheet 7B, back sheet 5, and cover sheet 4, which are arranged on the non-skin-facing side of the absorbent core 6C.

[0032] As shown in Figure 6(B), a plurality of adhesive zones 21K are formed intermittently between the top sheet 8 and the upper core wrap sheet 7A. The adhesive zones 21K are formed by applying a hot melt adhesive to the skin-facing side of the upper core wrap sheet 7A, and are interlayer portions that secure the top sheet 8 and the upper core wrap sheet 7A to each other. The adhesive zones 21K extend in the longitudinal direction of the diaper 1, and in this embodiment, the plurality of adhesive zones 21K are formed in stripes that extend parallel to each other along the longitudinal direction of the diaper. The areas between the top sheet 8 and the upper core wrap sheet 7A other than the adhesive zones 21K are non-adhesive zones 21H where the top sheet 8 and the upper core wrap sheet 7A are not adhered to each other.

[0033] By providing adhesive zones 21K where the top sheet 8 and the upper core wrap sheet 7A are bonded to each other, the top sheet 8 conforms to the shapes of the grooves 20 provided on the skin-facing side of the absorbent body 6, and the upper core wrap sheet 7A and the top sheet 8 are closely attached to each other. That is, grooves corresponding to the grooves 20 are provided in the top sheet 8. Air flows along the grooves provided in the top sheet 8, improving the breathability of the diaper 1. Furthermore, excreted fluids such as urine excreted by the wearer are dispersed along the grooves provided in the top sheet 8 into the portion of the top sheet 8 that overlaps with the absorbent body 6.

[0034] Here, the diaper 1 according to this embodiment is provided with a highly liquid permeable portion 22A (an example of the "first highly liquid permeable portion" in this application) that is provided in the upper core wrap sheet 7A at a portion overlapping the groove 20 and that allows liquids such as urine to pass more easily toward the absorbent core 6C than other portions of the upper core wrap sheet 7A. The highly liquid permeable portion 22A may be, for example, a hole provided in the upper core wrap sheet 7A, a portion having a relatively smaller basis weight than the surrounding area, a portion of the upper core wrap sheet 7A where the fibers are open, or a tear in the upper core wrap sheet 7A.

[0035] The highly liquid permeable portion 22A is located near the bonded portion 21K within the groove 20. The non-bonded portion 21H near the bonded portion 21K is an area where the top sheet 8 and the upper core wrap sheet 7A are relatively closely attached, and is a region through which liquid can easily pass. However, the provision of the highly liquid permeable portion 22A makes it easier for liquid to enter the absorbent core 6C through the highly liquid permeable portion 22A. This allows the diaper 1 according to this embodiment to improve its liquid absorption performance. As shown in FIG. 6(A), the highly liquid permeable portion 22A is formed in a circular shape, but this is not limiting. The highly liquid permeable portion 22A may be formed to extend in the longitudinal direction, width direction, or diagonal direction of the diaper 1.

[0036] Conventionally, it has been known to provide grooves for spreading liquid throughout the absorbent body in order to increase the rate at which the absorbent body absorbs liquid and the amount of liquid absorbed by the absorbent body. For example, grooves include slits, which are formed by removing the absorbent material (e.g., fluff pulp) from the absorbent body in a groove-like shape, and recesses, which are partially devoid of absorbent material. If these grooves are crushed by the absorbent body being pinched between the wearer's legs, for example, their ability to spread liquid may be reduced. On the other hand, grooves formed by compressing the absorbent body 6, as in this embodiment, are less likely to collapse than slits or recesses. When forming compressed grooves in the absorbent body, squeezing the top sheet from above after laminating the top sheet on the absorbent body may cause the top sheet to stretch, which may lead to tearing, etc. Therefore, it is preferable to laminate the top sheet on the absorbent body after squeezing the absorbent body from above the upper-layer core wrap sheet. However, if a manufacturing process is used in which the top sheet is laminated on the absorbent body after squeezing the absorbent body, spaces are likely to form between the top sheet and the upper-layer core wrap sheet. When spaces are formed between the sheets in this way, it is difficult for liquid to pass through these spaces to the absorbent body, and as a result, a large amount of liquid reaches the groove ends, and the large amount of liquid flows out from the groove ends, which can cause liquid to leak outside the diaper. Therefore, in the diaper 1 of this embodiment, the grooves 20 are compressed grooves, and high liquid permeability sections 22A are provided within the grooves 20 that allow liquid to easily enter the absorbent body 6, thereby preventing a large amount of liquid from reaching the ends of the grooves 20. By preventing a large amount of liquid from reaching the ends of the grooves 20, the diaper 1 of this embodiment can prevent leakage of liquid excreted by the wearer.

[0037] In this embodiment, the high liquid permeability portion 22A is provided at the intersection where the groove 20A intersects with the groove 20B. Although not shown, the high liquid permeability portion 22A is provided at multiple intersections of the grooves 20A and 20B shown in FIG. 5. At the intersections of the grooves 20A and 20B, the upper layer core wrap sheet 7A is pulled in the direction of extension of each groove, making the upper layer core wrap sheet 7A thinner than the surrounding area, more likely to open up, and more likely to tear. The high liquid permeability portion 22A can be formed by thin areas, open areas, or torn areas of the upper layer core wrap sheet 7A without perforating the upper layer core wrap sheet 7A at the intersections. Furthermore, since the high liquid permeability portion 22A can be provided at the intersections, each groove 20A or 20B with an intersection can have the high liquid permeability portion 22A within the groove, improving the absorption performance within the groove.

[0038] 6(A) and 6(B), the present embodiment also includes a highly liquid permeable section 22B (an example of the "second highly liquid permeable section" herein) provided in the upper core wrap sheet 7A in a region that does not overlap with the groove 20. Similar to the highly liquid permeable section 22A, the highly liquid permeable section 22B is a region through which liquids such as urine pass more easily toward the absorbent core 6C than other regions of the upper core wrap sheet 7A. By providing the highly liquid permeable section 22B, the diaper 1 according to the present embodiment can improve absorption performance outside the grooves, thereby suppressing liquid leakage.

[0039] Additionally, in the non-adhesive portions 21H outside the regions where the grooves 20 are formed, the top sheet 8 and the upper core wrap sheet 7A are not in close contact with each other, forming an air layer. In the non-adhesive portions 21H where an air layer is formed, liquid is less likely to pass from the top sheet 8 to the absorbent core 6C. In this embodiment, however, the highly permeable portions 22B are provided in the areas overlapping the non-adhesive portions 21H. This allows, for example, urine to move toward the absorbent core 6C via the highly permeable portions 22B during the first urination after the wearer puts on the diaper 1, thereby increasing the liquid absorption rate. Furthermore, during the first urination, the weight of the urine from the top sheet 8 presses the top sheet 8 toward the absorbent core 6C, thereby crushing the air layer and allowing the top sheet 8 and the upper core wrap sheet 7A to be in close contact with each other even in the non-adhesive portions 21H. This increases the liquid passage rate toward the absorbent core 6C outside the grooves 20 during subsequent urinations.

[0040] The adhesive portion 21K is bonded with an adhesive such as a hot melt adhesive. If the adhesive portion 21K is formed using a water-impermeable adhesive, urine may be shed on the non-skin-facing side of the top sheet 8. The non-permeable adhesive prevents excreted liquids such as urine from flowing in. Therefore, the highly permeable portion 22A near the bonded portion shown in FIG. 6(B) is the region where excreted liquids such as urine are most likely to flow to the non-skin-facing side of the top sheet 8. The adhesive application pattern for forming the bonded portion 21K is preferably, for example, spiral or serpentine. By applying the adhesive in a spiral or serpentine pattern, the top sheet 8 and the upper core wrap sheet 7A are in close contact with each other even if no adhesive is applied in the non-bonded portion 21H near the bonded portion 21K. Therefore, the top sheet 8 and the upper core wrap sheet 7A are in close contact with each other on the highly permeable portion 22B near the bonded portion 21K, making it easier for excreted liquids such as urine to move from the top sheet 8 to the absorbent core 6C.

[0041] Figure 7 is a diagram showing an application pattern of adhesive 21 that forms adhesive areas 21K when the upper layer core wrap sheet 7A is viewed from the skin-facing side. Figure 7(A) is a diagram showing a pattern in which adhesive 21 is applied in a spiral shape onto the upper layer core wrap sheet 7A. The adhesive 21 may be applied in a spiral shape onto the upper layer core wrap sheet 7A as shown in Figure 7(A). The spiral-shaped adhesive 21 is formed in a continuous line, and portions of the adhesive 21 and multiple non-adhesive areas 21H are arranged alternately along a predetermined direction. After applying adhesive 21 to the upper layer core wrap sheet 7A, a top sheet 8 is laminated on the upper layer core wrap sheet 7A, thereby intermittently adhering the upper layer core wrap sheet 7A and the top sheet 8.

[0042] 7(B) and 7(C) are diagrams showing patterns in which adhesive 21 is applied in a serpentine shape onto the upper core wrap sheet 7A. The serpentine shape may be a shape in which multiple peaks and valleys are alternately arranged, or a shape in which multiple arcs are arranged, with adjacent arcs facing in different directions. The adhesive 21 applied in a serpentine shape is applied in a continuous line, with portions of the adhesive 21 and multiple non-adhesive portions 21H arranged alternately along a predetermined direction. After applying adhesive 21 to the upper core wrap sheet 7A, a top sheet 8 is placed on the upper core wrap sheet 7A, thereby intermittently adhering the upper core wrap sheet 7A and the top sheet 8.

[0043] The predetermined direction may be the orientation direction of the fibers contained in the upper layer core wrap sheet 7A (hereinafter referred to as the "fiber orientation direction of the upper layer core wrap sheet 7A"), or may be a direction perpendicular to the fiber orientation direction of the upper layer core wrap sheet 7A. Furthermore, the predetermined direction is not limited to these, and may be another direction.

[0044] The thickness of the adhesive portion 21K and the size of the non-adhesive portion 21H provided between two adjacent adhesive portions 21K can be set to any value within a range that allows for sufficient adhesive strength. For example, the application width of adhesives 21A to 21C shown in FIG. 7 may be 0.1 mm or more and 2 mm or less. For example, the width of non-adhesive portion 21H provided between adhesives 21A and 21B shown in FIG. 7 may be 1 mm or more and 20 mm or less. For example, the width of groove 20 may be 0.5 mm or more and 20 mm or less, and the depth of groove 20 may be 0.5 mm or more and 5 mm or less.

[0045] The absorbent core 6C and the upper core wrap sheet 7A are bonded together with an adhesive such as a hot melt adhesive. Here, the adhesive density between the absorbent core 6C and the upper core wrap sheet 7A is higher than the adhesive density of the adhesive portion 21K, so excreted liquids such as urine can easily flow in from any part of the upper core wrap sheet 7A facing the absorbent core 6C and are absorbed by the entire absorbent core 6C.

[0046] When the grooves 20 are formed in the absorbent body 6 by compressing the upper core wrap sheet 7A side, the upper core wrap sheet 7A is pulled along the shape of the grooves 20 during the manufacturing process in which the absorbent body 6 is compressed from the skin-facing side. When the upper core wrap sheet 7A is pulled, the upper core wrap sheet 7A becomes thinner, and the thinner portions of the upper core wrap sheet 7A become more easily torn. FIG. 8(A) is a plan view showing a tear (fracture) occurring in the groove 20 when the upper layer core wrap sheet 7A is viewed from the skin side. FIG. 8(B) is an enlarged view of FIG. 8(A). As shown in FIGS. 8(A) and 8(B), the tear in the upper layer core wrap sheet 7A spreads along the groove 20B. Note that the tear in the upper layer core wrap sheet 7A may also spread along the groove 20A. Note that this tear may also be the above-mentioned high liquid permeability portion 22A, 22B.

[0047] Furthermore, when the upper layer core wrap sheet 7A becomes thin, cracks are likely to occur in the upper layer core wrap sheet 7A along the fiber orientation direction of the upper layer core wrap sheet 7A, and the upper layer core wrap sheet 7A may break from the cracks in the upper layer core wrap sheet 7A. When the upper layer core wrap sheet 7A is pulled, the cracks in the upper layer core wrap sheet 7A may spread in a direction perpendicular to the fiber orientation direction of the upper layer core wrap sheet 7A.

[0048] Figure 9 is a diagram showing the relationship between the extension direction of the top sheet 8 and the fiber orientation direction of the upper core wrap sheet 7A. In Figure 9, the extension direction of the top sheet 8 is a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A, but the extension direction of the top sheet 8 may also be a direction intersecting the fiber orientation direction of the upper core wrap sheet 7A.

[0049] When a tear in the upper core wrap sheet 7A propagates in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A, a portion of the upper core wrap sheet 7A becomes movable in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A. If the upper core wrap sheet 7A tears and a portion of the upper core wrap sheet 7A moves in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A, the top sheet 8 bonded to the upper core wrap sheet 7A may also tear. In this embodiment, the top sheet 8 is a stretchable, extensible sheet, and an example is an air-through nonwoven fabric. In this embodiment, the absorbent body 6 and the top sheet 8 are laminated so that the extension direction of the extensible top sheet 8 is intersecting or perpendicular to the fiber orientation direction of the upper core wrap sheet 7A. As a result, even if the upper core wrap sheet 7A tears and part of the upper core wrap sheet 7A moves in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A, the top sheet 8 stretches, thereby preventing tearing of the top sheet 8. Therefore, even if the upper core wrap sheet 7A tears, it is possible to prevent the absorbent material contained in the absorbent core 6C from leaking out from the top sheet 8.

[0050] Furthermore, the position at which the adhesive 21 constituting the adhesive portion 21K is applied may be adjusted to prevent cracks in the upper layer core wrap sheet 7A from spreading. The extending direction of the adhesive portion 21K may be the same as or approximately the same as the fiber orientation direction of the upper layer core wrap sheet 7A. For example, in the case of the upper layer core wrap sheet 7A shown in Figures 7(A) to 7(C), portions of the adhesive 21 and non-adhesive portions 21H (areas in Figure 7 where the adhesive 21 is not applied) are arranged alternately along the fiber orientation direction of the upper layer core wrap sheet 7A. Because the adhesive 21 increases the strength of the adhesive portion 21K to which the adhesive 21 is applied, cracks in the upper layer core wrap sheet 7A in the fiber orientation direction of the upper layer core wrap sheet 7A are prevented from spreading beyond the adhesive 21. In detail, if a tear occurs in the upper layer core wrap sheet 7A between one portion of the adhesive 21A and another portion of the adhesive 21A, the spread of the tear in the upper layer core wrap sheet 7A in the fiber orientation direction of the upper layer core wrap sheet 7A will be contained between the one portion of the adhesive 21A and the other portion of the adhesive 21A. In this way, the spread of the tear in the upper layer core wrap sheet 7A that occurs between the one portion of the adhesive 21A and the other portion of the adhesive 21A is suppressed by the one portion of the adhesive 21A and the other portion of the adhesive 21A.

[0051] The extending direction of at least some of the multiple adhesive portions 21K may be the same or approximately the same as the fiber orientation direction of the upper layer core wrap sheet 7A. As described above, when a tear occurs in the upper layer core wrap sheet 7A along the fiber orientation direction of the upper layer core wrap sheet 7A, the upper layer core Cracks in the wrap sheet 7A may propagate in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A. Cracks in the upper core wrap sheet 7A may also occur between adjacent adhesives 21 among the multiple adhesives 21. For example, a tear in the upper core wrap sheet 7A may occur between adhesive 21A and adhesive 21B. In this case, the adhesives 21A and 21B suppress the propagation of the tear in the upper core wrap sheet 7A in a direction perpendicular to the fiber orientation direction of the upper core wrap sheet 7A.

[0052] 7(A) to 7(C), when the upper layer core wrap sheet 7A is viewed in a plane, the extension direction of the grooves 20 and the extension direction of the adhesive 21 may intersect. Therefore, when the upper layer core wrap sheet 7A is viewed in a plane, part of the grooves 20 and part of the adhesive 21 may overlap.

[0053] When the extension direction of the grooves 20 intersects with the extension direction of the adhesive 21, the adhesive 21 extends to part of the area where the grooves 20 are formed in the upper layer core wrap sheet 7A, and the non-adhesive portion 21H extends to most of the area where the grooves 20 are formed in the upper layer core wrap sheet 7A. This prevents the force when the upper layer core wrap sheet 7A is pulled during the manufacturing process of the grooves 20 from being transmitted to the top sheet 8 in the area where the grooves 20 are formed in the upper layer core wrap sheet 7A, and prevents the top sheet 8 from tearing.

[0054] One of the multiple adhesive portions 21K may be adjacent to another of the multiple adhesive portions 21K. For example, adhesive 21A and adhesive 21B may be adjacent to each other, or adhesive 21B and adhesive 21C may be adjacent to each other. Furthermore, when the upper layer core wrap sheet 7A is viewed in plan, a portion of one adhesive 21 of the multiple adhesive portions 21K may overlap a portion of another adhesive 21 of the multiple adhesive portions 21K. FIG. 10 is a plan view showing the adhesive pattern of adhesive 21 applied to the skin-facing side of the upper layer core wrap sheet 7A. As shown in FIGS. 10(A) to 10(C), when the upper layer core wrap sheet 7A is viewed in plan, a portion of adhesive 21A may overlap a portion of adhesive 21B, and a portion of adhesive 21B may overlap a portion of adhesive 21C. The longer the gap between the multiple adhesive portions 21K in the fiber orientation direction of the upper layer core wrap sheet 7A, the more likely it is that a tear in the upper layer core wrap sheet 7A that occurs between the multiple adhesive portions 21K will spread along the fiber orientation direction of the upper layer core wrap sheet 7A. When a portion of the adhesive 21 of one of the multiple adhesive portions 21K overlaps with a portion of the adhesive 21 of another of the multiple adhesive portions 21K, the length of the gap between the multiple adhesive portions 21K in the fiber orientation direction of the upper layer core wrap sheet 7A becomes shorter. Therefore, a tear in the upper layer core wrap sheet 7A that occurs between the multiple adhesive portions 21K can be prevented from spreading along the fiber orientation direction of the upper layer core wrap sheet 7A.

[0055] The extending direction of the adhesive portion 21K may be the same as or approximately the same as the extending direction of some of the grooves 20. FIG. 11 is a plan view showing the adhesive pattern of the adhesive 21 applied to the skin side of the upper layer core wrap sheet 7A. In FIG. 11, the adhesive 21 is applied in a spiral shape to the upper layer core wrap sheet 7A. As shown in FIG. 11, the extending direction of the adhesives 21A-21C is the same as or approximately the same as the extending direction of the grooves 20A. If a tear occurs in the upper layer core wrap sheet 7A along the extending direction of the grooves 20A, the tear in the upper layer core wrap sheet 7A may grow in a direction perpendicular to the extending direction of the grooves 20A. By having the extending direction of the adhesives 21A-21C be the same as or approximately the same as the extending direction of the grooves 20A, the adhesives 21A-21C suppress the spread of the tear in the upper layer core wrap sheet 7A in the direction perpendicular to the extending direction of the grooves 20A.

[0056] Furthermore, a tear may occur in the upper layer core wrap sheet 7A between two adhesives 21 among the plurality of adhesives 21. For example, if a tear occurs in the upper layer core wrap sheet 7A between adhesive 21A and adhesive 21B, A tear may occur in the upper core wrap sheet 7A. In this case, the adhesives 21A and 21B suppress the spread of the tear in the upper core wrap sheet 7A in a direction perpendicular to the extension direction of the groove 20A. In this way, by arranging a portion of the groove 20 between two of the multiple adhesive portions 21K, the two of the multiple adhesive portions 21K suppress the spread of the tear in the upper core wrap sheet 7A. The configuration is not limited to the example shown in FIG. 11 , and the extension direction of the adhesives 21A to 21C may be the same or approximately the same as the extension direction of the groove 20B. Furthermore, a linear adhesive 21 may be formed on the skin-facing side of the upper core wrap sheet 7A. Furthermore, a serpentine-shaped adhesive 21 may be formed on the skin-facing side of the upper layer core wrap sheet 7A, or an adhesive 21 having a shape in which multiple arc shapes and multiple straight shapes are alternately arranged may be formed on the upper layer core wrap sheet 7A.

[0057] FIG. 12 is a diagram showing the shape of the groove 20. FIG. 12(A) is a diagram showing grooves 20A and 20B according to this embodiment. It is preferable to provide the non-adhesive portion 21H on the skin-facing side of the intersection 20K (an example of the "intersection" referred to in this application) of the groove 20A and the groove 20B. To diffuse excreted liquid such as urine throughout the absorbent body 6, it is preferable to provide multiple grooves 20 and have the multiple grooves 20 intersect with each other to extend throughout the absorbent body 6. However, during the manufacturing process in which the absorbent body 6 is compressed from the skin-facing side, the intersection 20K is pulled along the shape of the groove 20A and the groove 20B, thinning the upper-layer core wrap sheet 7A corresponding to the intersection 20K and forming a highly permeable portion 22A. Therefore, excreted liquid such as urine is more easily absorbed by the absorbent body 6 at the intersection 20K than at the upper-layer core wrap sheet 7A other than the intersection 20K. By providing non-adhesive portion 21H on the non-skin-facing side of intersection 20K, an air layer is formed on the skin-facing side of intersection 20K, and absorption of excreted fluid such as urine by absorbent body 6 can be suppressed.

[0058] Furthermore, by providing non-adhesive portions 21H at the intersections 20K, the force of the air layer pulling the upper core wrap sheet 7A is less likely to be transmitted to the top sheet 8, preventing tearing of the top sheet 8. Furthermore, when adhesive portions 21K are placed at the intersections 20K, the adhesive portions 21K at the intersections 20K prevent tears in the upper core wrap sheet 7A from spreading.

[0059] Non-adhesive portions 21H may be arranged on part or all of the bottom surface of grooves 20 corresponding to intersections 20K. This makes it difficult for the force generated when the upper core wrap sheet 7A tears to be transmitted to the top sheet 8 at the bottom surfaces of grooves 20 corresponding to intersections 20K, thereby preventing tearing of the top sheet 8. Furthermore, when adhesive portions 21K are arranged on the bottom surfaces of grooves 20 corresponding to intersections 20K, the spread of tears in the upper core wrap sheet 7A is prevented by the adhesive 21 that forms adhesive portions 21K provided on the bottom surfaces of grooves 20.

[0060] Non-adhesive portions 21H may be arranged on some or all of the side surfaces of grooves 20 corresponding to intersections 20K. This makes it difficult for the force generated when the upper core wrap sheet 7A tears to be transmitted to the top sheet 8 on the side surfaces of grooves 20 corresponding to intersections 20K, thereby preventing tearing of the top sheet 8. Furthermore, when adhesive portions 21K are arranged on the side surfaces of grooves 20 corresponding to intersections 20K, the adhesive 21 forming adhesive portions 21K on the side surfaces of grooves 20 prevents the tear in the upper core wrap sheet 7A from spreading.

[0061] Furthermore, the upper-layer core wrap sheet 7A at the intersection 20K is easily torn because it is pulled by the shapes of the grooves 20A and 20B as described above. If the upper-layer core wrap sheet 7A at the intersection 20K is torn, the absorbent core 6C that absorbs excreted liquids such as urine is exposed to the skin-facing side of the top sheet 8 and absorbs excreted liquids such as urine. Therefore, by providing a non-adhesive portion 21H on the non-skin-facing side of the intersection 20K and forming an air layer, excreted liquids such as urine can be allowed to flow throughout the entire area of ​​the groove 20.

[0062] As shown in FIG. 12(B), the grooves 20 are arranged in a hexagonal honeycomb lattice pattern. The grooves 20 may be arranged in a manner such that they extend in three directions. In this case, it is preferable to provide a non-adhesive portion 21H on the skin-facing side of the base portion 20M, which serves as the base point from which multiple grooves 20 overlap and extend in different directions. By providing the non-adhesive portion 21H on the skin-facing side of the base portion 20M, an air layer is formed on the skin-facing side of the base portion 20M, which makes it possible to prevent excreted liquids such as urine from being absorbed by the absorbent body 6.

[0063] The distance between the multiple adhesive portions 21K is preferably equal to or smaller than the average particle size of the SAP particles. If the size of the cracks in the upper core wrap sheet 7A is equal to or smaller than the average particle size of the SAP particles contained in the absorbent core 6C, the SAP particles will have difficulty passing through the cracks in the upper core wrap sheet 7A, thereby preventing the SAP particles from leaking out of the top sheet 8. Therefore, the size of the cracks in the upper core wrap sheet 7A is preferably equal to or smaller than the average particle size of the SAP particles. Because the expansion of the cracks in the upper core wrap sheet 7A is prevented by the multiple adhesive portions 21K, if the spacing between the multiple adhesive portions 21K is narrow, the cracks in the upper core wrap sheet 7A will be smaller. Therefore, the distance between the multiple adhesive portions 21K is preferably equal to or smaller than the average particle size of the SAP particles.

[0064] On the other hand, if the spacing between the multiple adhesive regions 21K is narrow, the rate at which moisture inflows into the absorbent core 6C will be slow if a water-impermeable adhesive is used to bond the upper core wrap sheet 7A and the top sheet 8. Furthermore, if the distance between the multiple adhesive regions 21K is short and the average particle diameter of the SAP particles is large, the rate at which moisture inflows into the absorbent core 6C will be slow. If the distance between the multiple adhesive regions 21K is long and the average particle diameter of the SAP particles is small, the rate at which moisture inflows into the absorbent core 6C will be fast. To increase the rate at which moisture inflows into the absorbent core 6C while suppressing leakage of the SAP particles, it is preferable that the average particle diameter of the SAP particles be 200 μm or more and 600 μm or less, and that the average distance between each of the multiple adhesive regions 21K is 0.5 to 3 times the average particle diameter of the SAP particles. For example, in the configuration shown in FIG. 7(A), the average distance between adhesive 21A and adhesive 21B may be 0.5 to 3 times the average particle diameter of the SAP particles. The extending direction of the multiple adhesive portions 21K may be the same as or approximately the same as the fiber orientation direction of the upper layer core wrap sheet 7A, or may be the same as or approximately the same as the extending direction of some of the multiple grooves 20. It is preferable that some or all of the SAP particles are not adhered to the upper layer core wrap sheet 7A.

[0065] In this embodiment, when the upper layer core wrap sheet 7A is viewed in a plane, an example is shown in which the extension direction of the grooves 20 and the extension direction of the adhesive 21 intersect, but this configuration example is not limited to this. For example, when the upper layer core wrap sheet 7A is viewed in a plane, the extension direction of the grooves 20A and the extension direction of the adhesive 21 may be parallel, and the extension direction of the grooves 20B and the extension direction of the adhesive 21 may intersect. When the upper layer core wrap sheet 7A is viewed in a plane, the extension direction of the grooves 20B and the extension direction of the adhesive 21 may intersect, and the extension direction of the grooves 20B and the extension direction of the adhesive 21 may be parallel. When the upper layer core wrap sheet 7A is viewed in a plane, a portion of the grooves 20 and a portion of the adhesive 21 may overlap. When the upper layer core wrap sheet 7A is viewed in a plane, a portion of the grooves 20A and a portion of the adhesive 21 may overlap, or a portion of the grooves 20B and a portion of the adhesive 21 may overlap.

[0066] The grooves 20 may be arranged in a grid pattern with a plurality of grooves angled in the longitudinal direction of the absorbent core 6C, and may be arranged so that the continuous direction (stretching direction) of the continuous linear adhesive 21 coincides with the longitudinal direction of the absorbent core 6C. For example, the grid of the plurality of grooves 20 may be inclined at 45 degrees with respect to the longitudinal direction of the absorbent core 6C.

[0067] <Other embodiments> In the above embodiment, as shown in FIGS. 6(A) and 6(B), the high liquid permeability portion 22A is provided at the intersection where the groove 20A and the groove 20B intersect. However, it is also possible to provide a high liquid permeability portion 22A so that the groove 20A branches into a Y-shape or a T-shape. In the case where the grooves 20 are provided in the grooves 20, the high liquid permeability portions 22A may be provided at the branching portions of the grooves 20. This allows the high liquid permeability portions 22A to be provided in areas where the upper-layer core wrap sheet 7A becomes thinner, such as at the branching portions and intersections of the grooves 20.

[0068] Furthermore, although the above embodiment has been described taking a tape-type diaper as an example, the present invention is not limited to this and can also be applied to other absorbent articles such as pants-type diapers and absorbent pads.

[0069] The features included in each of the embodiments and modifications thereof disclosed above can be combined with each other. [Explanation of symbols]

[0070] 1. Diapers 1F: Front body area 1B...Inseam area 1R: Back area 2F Front patch 2L, 2R Tape 3LL, 3LR... Folded line 3BL,3BR··Leakage prevention wall 33L,33R・Fixed part 4. Cover sheet 4SL, 4SR, 9EL, 9ER... Elastic thread 5. Back seat 6. Absorber 6C··Absorbent Core 7. Core wrap sheet 7A··Upper layer core wrap sheet 7B··Lower layer core wrap sheet 8. Top sheet 9L, 9R side seats 9AL,9AR·Fixed area 9BL,9BR··Free end 20. Compression groove 20A,20B·Groove 20K...intersection 20M Base 21. Adhesive 21K...Adhesive part 21H...Non-adhesive part 22A·High liquid flow part 22B··High liquid flow part

Claims

1. an absorbent body having an absorbent mat and a first water-permeable sheet disposed on the wearer's skin side of the absorbent mat; a compression groove formed by compressing the skin-facing side of the absorbent body; a first highly permeable portion provided in the first water-permeable sheet at a portion overlapping the compression groove, the first highly permeable portion allowing liquid to pass more easily toward the absorbent mat than other portions of the first water-permeable sheet; One or more second water-permeable sheets adhered to the skin side of the first water-permeable sheet; An absorbent article comprising:

2. A plurality of said compression grooves are provided which intersect or branch off from each other, The first high liquid permeability portion is provided so as to overlap an intersection or branching portion of the compression groove. The absorbent article of claim 1.

3. a second liquid-permeable portion provided on the first water-permeable sheet at a portion not overlapping the compression groove, through which liquid passes more easily toward the absorbent mat than in other portions of the first water-permeable sheet; The absorbent article of claim 1.

4. the second water-permeable sheet is extensible; The extension direction of the second water-permeable sheet is a direction intersecting or perpendicular to the orientation direction of the fibers contained in the first water-permeable sheet, The absorbent article according to claim 1 or 2.

5. The first water-permeable sheet and the second water-permeable sheet are bonded together, and a plurality of adhesive portions are provided between the first water-permeable sheet and the second water-permeable sheet at intervals, The extending direction of at least some of the plurality of adhesive portions is the same as the orientation direction of the fibers contained in the first water-permeable sheet. The absorbent article according to claim 1 or 2.

6. a plurality of adhesive portions provided between the first water-permeable sheet and the second water-permeable sheet at intervals, the adhesive portions being constituted by a continuous line of adhesive that bonds the first water-permeable sheet and the second water-permeable sheet; a non-adhesive portion provided between the first water-permeable sheet arranged in the compression groove and the second water-permeable sheet on the skin side, where the two sheets are not adhered to each other; Equipped with A part of the adhesive and a plurality of the non-adhesive portions are alternately arranged along the orientation direction of the fibers contained in the first water-permeable sheet. The absorbent article according to claim 1 or 2.

7. When the first water-permeable sheet is viewed in a plane, the adhesive is applied in a spiral shape or a serpentine shape. The absorbent article of claim 6.

8. one of the plurality of adhesive portions and another of the plurality of adhesive portions are disposed adjacent to each other; The absorbent article of claim 6.

9. When the first water-permeable sheet is viewed in a plane, a part of the adhesive of one of the plurality of adhesive portions overlaps with a part of the adhesive of another of the plurality of adhesive portions. The absorbent article of claim 6.

Images