Absorbent article

Abstract

To provide an art for preventing leak of excretory fluid containing solid components in an absorbent article.SOLUTION: An absorbent article comprises an absorbent core containing a first water-absorbing polymer and capable of absorbing excretory fluid of a wearer, and a laminated sheet disposed closer to a skin surface side than an absorbent core and in which a plurality of sheets are laminated. The laminated sheet includes an adhesion part where a plurality of sheets are bonded to each other with an adhesive, where an opening ratio in the thickness direction of the laminated sheet is 10-25%, and a maximum value of the diameter of a circumscribed circle of the opening provided in the laminated sheet is smaller than a mode of a particle size of the first absorbent polymer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Absorbent articles such as disposable diapers, absorbent pads, sanitary napkins, etc. Regarding such absorbent articles, for example, Patent Document 1 discloses a technique for preventing urine containing solid components from leaking from the absorbent article. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-026519 Summary of the Invention [Problem to be solved by the invention]

[0004] In some absorbent articles, a laminated sheet consisting of two or more sheets is placed closer to the wearer's skin than the absorbent core. When the wearer excretes cloudy urine or watery feces containing solid components, the solid components may become trapped in the gaps between the fibers that form the laminated sheet, reducing the liquid permeability of the laminated sheet. In such cases, the excreted liquid may leak out without being absorbed by the absorbent body.

[0005] Therefore, an object of the present invention is to provide a technique for preventing leakage of discharged liquid containing solid components from an absorbent article. [Means for solving the problem]

[0006] In order to solve the above problem, in the present invention, the opening ratio of the laminated sheet placed on the skin side of the absorbent core is set to a range that ensures permeability of discharged liquid containing solid components, and further suppresses leakage of the absorbent polymer contained in the absorbent body.

[0007] In detail, an absorbent article according to one aspect of the present disclosure comprises an absorbent core containing a first water-absorbent polymer and capable of absorbing liquid excreted by a wearer, and a laminated sheet arranged on the skin side of the absorbent core and including multiple sheets stacked together, wherein the laminated sheet has adhesive portions where the multiple sheets are bonded to each other with an adhesive, the opening rate in the thickness direction of the laminated sheet is 10 to 25%, and the maximum value of the diameter of the circumscribed circle of the openings in the laminated sheet is smaller than the most frequent value of the particle diameter of the first water-absorbent polymer.

[0008] An absorbent article according to one aspect of the present disclosure includes an absorbent core containing a first water-absorbing polymer and capable of absorbing liquid discharged from a wearer, and a laminated sheet arranged closer to the skin side than the absorbent core and including a plurality of laminated sheets, the laminated sheet having adhesive portions where the plurality of sheets are bonded to each other with an adhesive, and a first absorption rate of a predetermined liquid passing through the laminated sheet is less than 120 seconds and a second absorption rate is less than 150 seconds, and the laminated sheet The maximum diameter of the circumscribing circle of the opening of the container may be smaller than the mode of the particle diameter of the first water-absorbing polymer.

[0009] In the absorbent article according to the above aspect, a plurality of the adhesive portions may be provided, and the adhesive portions may be spaced apart from each other.

[0010] In the absorbent article according to the above aspect, each of the plurality of adhesive portions is It may extend helically about the longitudinal axis of the article.

[0011] In addition, in the absorbent article relating to the above-mentioned one aspect, the absorbent core may have a first core provided on the non-skin side and capable of diffusing moisture more than the skin side, and a second core provided on the skin side and having a first through hole penetrating in the thickness direction.

[0012] In the absorbent article according to the above aspect, the first through-hole may be provided in a region corresponding to a urethral opening when a wearer wears the absorbent article.

[0013] In addition, the absorbent article relating to the above-mentioned aspect may further include a non-permeable back sheet on the non-skin-facing side of the absorbent core, and the first core may have a recess at a position that overlaps with the first through hole when viewed in a plane from the thickness direction.

[0014] In addition, the absorbent article according to the above aspect may further include a tissue between the absorbent core and the back sheet.

[0015] In the absorbent article according to the above aspect, the recess may extend in the longitudinal direction of the absorbent article.

[0016] In addition, the absorbent article according to the above aspect may further include a second water-absorbing polymer between the first core and the second core.

[0017] In the absorbent article according to the above aspect, the second water-absorbing polymer may be provided in a peripheral region of the recess.

[0018] In the absorbent article according to the above aspect, the first through-hole and the recess may have a total depth of 16 mm to 20 mm, a width of 15 to 50 mm, and a length of 100 to 400 mm.

[0019] In the absorbent article according to the above aspect, the recess may be a second through-hole.

[0020] In the absorbent article according to the above aspect, the recess may be a groove.

[0021] In the absorbent article according to the above aspect, the width of the first through-hole may be narrower than the width of the recess.

[0022] In the absorbent article according to the above aspect, the width of the first core and the width of the second core may be different.

[0023] In the absorbent article according to the above aspect, the laminated sheet may include at least a top sheet that comes into contact with the wearer's skin, and a core wrap sheet that wraps the absorbent core. [Effects of the Invention]

[0024] According to the present invention, leakage of discharged liquid containing solid components can be prevented in an absorbent article. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 illustrates an outline of an absorbent pad according to an embodiment. [Figure 2] FIG. 2 illustrates a detailed view of the absorbent pad. [Figure 3] FIG. 3 is an example of a flow chart for an experiment on the absorption rate and return of cloudy urine. [Figure 4] FIG. 4 illustrates the state in which the plate is placed on the topsheet. [Figure 5] FIG. 5 illustrates the results of an absorbent pad absorption performance experiment. [Figure 6] FIG. 6 is an example of a cross-sectional view of an absorbent pad according to a first modified example. [Figure 7] FIG. 7 is an example of a cross-sectional view of an absorbent pad according to a second modified example. [Figure 8] FIG. 8 is an example of a cross-sectional view of an absorbent pad according to a third modified example. [Figure 9] FIG. 9 illustrates a summary of the results of the absorption rate test and the wearing behavior test. [Figure 10] FIG. 10 illustrates an outline of an absorbent pad according to a fifth modification. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

[0027] In this embodiment, the longitudinal direction of a urine absorbent pad 10 (an example of an "absorbent article" in the present application, hereinafter simply referred to as an "absorbent article") is the direction connecting the front body (front body region 1F shown in FIG. 1) arranged opposite the wearer's abdomen and the back body (back body region 1R shown in FIG. 1) arranged opposite the wearer's back. Between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (the center in the longitudinal direction) is located a crotch portion (crotch region 1B shown in FIG. 1) arranged between the wearer's crotch (facing the crotch). When the absorbent pad 10 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 thickness direction is the direction connecting the skin-facing side and the non-skin-facing side, and the width direction is the direction perpendicular to both the longitudinal direction and the thickness direction. Additionally, a view from the thickness direction is considered a planar view.

[0028] FIG. 1 is a plan view of an absorbent pad 10 according to an embodiment, viewed from the skin-facing side. The absorbent pad 10 is used to absorb and retain liquids such as urine, and can be used alone or layered inside a disposable diaper. When worn, the absorbent pad 10 comprises a front body region 1F located on the wearer's abdomen, a crotch region 1B located between the legs, and a back body region 1R located on the back. In addition, the crotch region 1B of the absorbent pad 10 has a narrowed gourd shape in a plan view. Thus, the narrowest region of the gourd shape of the absorbent pad 10 is located within the crotch region 1B.

[0029] The absorbent pad 10 includes a top sheet 11 that is disposed on the skin-facing side when the absorbent pad 10 is worn. The top sheet 11 is the portion that contacts the wearer's skin (the skin-facing surface) when the absorbent pad 10 is worn, and is made of a liquid-permeable material that allows liquids such as urine to pass through. The top sheet 11 may be made of woven fabric, nonwoven fabric, 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 hydrophilized, or may be an air-through nonwoven fabric, point-bonded nonwoven fabric, spun-bonded nonwoven fabric, melt-blown nonwoven fabric, or the like.

[0030] The absorbent pad 10 also includes an absorbent body 13 that absorbs liquids such as urine. The absorbent body 13 is arranged in the crotch region 1B and includes an upper absorbent core 19A arranged on the top sheet 11 side and a lower absorbent core 19B arranged on the non-skin-facing side, serving as an absorbent mat. The upper absorbent core 19A has a gourd shape similar to that of the absorbent pad 10 in plan view. The lower absorbent core 19B is arranged below the upper absorbent core 19A when viewed from the top sheet 11 side, and has a rectangular shape (oblong shape) in plan view, with its long sides aligned with the longitudinal direction of the absorbent pad 10. The upper absorbent core 19A and the lower absorbent core 19B are stacked in the thickness direction so that their respective widthwise centers are approximately aligned. In plan view, the upper absorbent core 19A is larger than the lower absorbent core 19B. The longitudinal direction of the absorbent body 13 coincides with the longitudinal directions of the upper absorbent core 19A and the lower absorbent core 19B and the absorbent pad 10.

[0031] The absorbent pad 10 also includes a pair of side sheets 7L, 7R arranged on both skin-facing sides of the absorbent pad 10 in the width direction and extending along the longitudinal direction. The side sheets 7L, 7R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 11. The side sheets 7L, 7R have fixed end portions 7LA, 7RA arranged on their widthwise outer sides. The fixed end portions 7LA, 7RA are bonded with an adhesive to members arranged on their non-skin-facing sides (lower layers). The upper absorbent core 19A is formed with a width larger than that of the top sheet 11, and the widthwise ends of the upper absorbent core 19A do not overlap the top sheet 11 but overlap and are bonded to the fixed end portions 7LA, 7RA of the side sheets 7L, 7R. In this embodiment, the entire non-skin-facing sides of the fixed end portions 7LA, 7RA arranged on the upper absorbent core 19A of the absorber 13 are bonded to the upper absorbent core 19A with an adhesive.

[0032] The side sheets 7L, 7R also have free ends 7LB, 7RB located on the inside in the width direction of the absorbent pad 10, and rubber threads 8L, 8R that are stretched in the longitudinal direction of the absorbent pad 10 at the free ends 7LB, 7RB. The free ends 7LB, 7RB are not joined to any part of the absorbent pad 10, and contraction of the rubber threads 8L, 8R causes the free ends 7LB, 7RB to stand up toward the skin, forming three-dimensional gathers 30L, 30R. The three-dimensional gathers 30L, 30R prevent side leakage of liquid.

[0033] As shown in FIG. 1, the ears 11L and 11R are the regions extending widthwise outward of the free ends 7LB and 7RB (widthwise outward of the three-dimensional gathers 30L and 30R) in a plan view. In this embodiment, the ears 11L and 11R are formed from the front body region 1F to the back body region 1R, and are wider in the front body region 1F and the back body region 1R than the crotch region 1B. The upper absorbent core 19A is positioned to include the widthwise outer side of the free ends 7LB and 7RB, and the lower absorbent core 19B is positioned widthwise inward of the free ends 7LB and 7RB. The absorbent pad 10 can increase its liquid absorption capacity by increasing the size of the upper absorbent core 19A while improving the cushioning properties of the ears 11L and 11R. The ears 11L and 11R may be formed in either the front body region 1F or the back body region 1R.

[0034] In absorbent articles such as absorbent pads, there is a risk of backflow, where liquid once absorbed into the absorbent body extending outward in the width direction of the upright gathers leaks to the skin-facing side. If backflow of liquid occurs at the widthwise outer side of the upright gathers, the liquid will leak from the absorbent article. Therefore, in the absorbent pad 10 according to this embodiment, to prevent backflow of liquid once absorbed by the upper absorbent core 19A in the ear portions 11L and 11R, the entire non-skin-facing side of the fixed ends 7LA and 7RA arranged on the upper absorbent core 19A is adhesively bonded to the upper absorbent core 19A. In this embodiment, adhesive is applied to the entire non-skin-facing side of the fixed ends 7LA and 7RA, and the fixed ends 7LA and 7RA are bonded to a component arranged on the non-skin-facing side. In the plan view of FIG. 1, the adhesive-applied areas 32L and 32R of the fixed ends 7LA and 7RA are indicated by dotted hatching. For example, a hot melt adhesive is used as the adhesive. By applying an adhesive, the fixed ends 7LA, 7RA can be fixed to the non-skin-facing member while being made liquid-impermeable. As a result, the absorbent pad 10 according to this embodiment can prevent liquid once absorbed into the upper absorbent core 19A from leaking back to the skin-facing side from the outside in the width direction of the three-dimensional gathers 30L, 30R (free ends 7LB, 7RB), thereby preventing liquid leakage.

[0035] Furthermore, in an absorbent article, if a hydrophobic sheet material is layered on the skin-facing side of the ear portion to prevent the three-dimensional gathers from returning to their widthwise outer sides, the number of parts (components) in the absorbent article increases. Furthermore, the layering of the hydrophobic sheet material may result in a poor feel against the skin, which may require measures to prevent bedsores. On the other hand, in the absorbent pad 10 according to this embodiment, the return of the three-dimensional gathers 30L, 30R from their widthwise outer sides can be prevented by applying an adhesive to the non-skin-facing sides of the fixed ends 7LA, 7RA of the side sheets 7L, 7R, without layering a hydrophobic sheet material on the widthwise outer sides of the three-dimensional gathers 30L, 30R.

[0036] Furthermore, when a hydrophobic sheet member is laminated on the widthwise outer side of the three-dimensional gathers, it may be difficult to bond the sheet member to the side sheet used to form the three-dimensional gathers. Furthermore, it is necessary to design an absorbent article taking into consideration the effects of the sheet member on the wearer's skin, etc. In contrast, the absorbent pad 10 according to this embodiment does not have to laminate a hydrophobic sheet member on the widthwise outer side of the three-dimensional gathers 30L, 30R, and therefore these problems do not arise.

[0037] Furthermore, in the absorbent pad 10 according to this embodiment, the entire non-skin-facing side of the fixed ends 7LA, 7RA arranged on the absorbent body 13 is bonded to the upper absorbent core 19A of the absorbent body 13 with an adhesive, so that the fixed ends 7LA, 7RA of the side sheets 7L, 7R are firmly bonded to the upper absorbent core 19A, making the upper absorbent core 19A less likely to crack. Furthermore, the widthwise ends of the fixed ends 7LA, 7RA are bonded to the non-skin-facing sheet with an adhesive. The absorbent pad 10 can fix the absorbent body 13 in place by bonding the side sheets 7L, 7R to the sheet member arranged on the non-skin-facing side of the absorbent body 13, preventing the absorbent body 13 from moving and cracking.

[0038] Furthermore, in an absorbent article, when the absorbent body is not cracked, liquid spreads concentrically within the absorbent body, whereas when the absorbent body is cracked, liquid moves along the cracks in the absorbent body. When the absorbent body is cracked, liquid reaches the absorbent body edge more easily than when the absorbent body is not cracked. When the cracks in the absorbent body extend to the absorbent body edge, liquid reaches the absorbent body edge particularly quickly. Furthermore, even when a crack occurs in the absorbent body but the crack does not extend to the absorbent body edge, liquid reaches the absorbent body edge more quickly than when the absorbent body is not cracked. In an absorbent article, if liquid reaches the absorbent body edge too quickly, liquid leakage may occur. However, as described above, the absorbent pad 10 according to this embodiment can prevent the absorbent body 13 from cracking, thereby preventing liquid from reaching the edge of the absorbent body 13 too quickly and thereby suppressing liquid leakage.

[0039] The upper absorbent core 19A is positioned so as to include the outer side of the free ends 7LB, 7RB in the width direction, while the lower absorbent core 19B is positioned so as to be inner side of the free ends 7LB, 7RB in the width direction. With this configuration, the lower absorbent core 19B absorbs and retains urine in the upper absorbent core 19A, and the widthwise ends of the lower absorbent core 19B are located inside (within the range of) the three-dimensional gathers 30L, 30R. Therefore, even if urine is squeezed out of the lower absorbent core 19B, the upper absorbent core 19A is positioned on the skin-facing side, and the three-dimensional gathers 30L, 30R are also positioned on the outer side in the width direction, thereby preventing leakage of liquid from the space formed between the absorbent pad 10 and the wearer's skin. Furthermore, this configuration makes it difficult for urine to reach the widthwise outer edges (ear portions 11L, 11R) of the free ends 7LB, 7RB, and even if urine is squeezed out from the widthwise ends of the lower absorbent core 19B, the upper absorbent core 19A surrounding those ends can absorb and retain the urine.Furthermore, since the entire non-skin-facing side of the fixed ends 7LA, 7RA arranged on the upper absorbent core 19A is bonded to the upper absorbent core 19A with an adhesive, leakage of liquid from the widthwise outer edges of the free ends 7LB, 7RB can be suppressed.

[0040] FIG. 2 illustrates a detailed view of the absorbent pad 10. FIG. 2(A) is a cross-sectional view of the absorbent pad 10 along arrows AA in FIG. 2(B) is an example of a cross-sectional view of the absorbent pad 10. On the other hand, Fig. 2(B) is an example of a top view of the absorbent pad 10 viewed from the skin side. In Fig. 2(B), the top sheet 11, the second sheet 12, and the absorbent body 13 are shown in simplified rectangular shapes.

[0041] As shown in Figure 2(A), the absorbent pad 10 is composed of a top sheet 11, a second sheet 12, and an absorbent body 13 laminated in this order from the skin side. The second sheet 12 is a liquid-permeable sheet-like member laminated between the top sheet 11 and the absorbent body 13. The second sheet 12 is adhered to the top sheet 11 and the absorbent body 13 via an HM (hot melt) adhesive.

[0042] FIG. 2(B) illustrates an outline of an adhesive zone 16 where the top sheet 11 and the second sheet 12 are bonded together with an HM adhesive. As shown in FIG. 2(B), the HM adhesive is applied to the second sheet 12 in a spiral shape centered on an axis extending in the longitudinal direction. Multiple HM adhesives are applied in the width direction, and the HM adhesives are spaced apart from one another. The widthwise separation distance between the HM adhesives is, for example, about 3 mm. When this HM adhesive is melted, the adhesive zone 16 that bonds the top sheet 11 and the second sheet 12 is formed. The adhesive zone 16 also becomes a water-impermeable region.

[0043] Alternatively, in the adhesive portion 16, the top sheet 11 and the second sheet 12 may be welded together by melting the top sheet 11 or the second sheet 12 with heat or ultrasonic waves without using an adhesive.

[0044] As described above, the absorbent body 13 has two absorbent core layers in the thickness direction (see FIG. 2(A)). That is, the absorbent body 13 has an upper absorbent core 19A (an example of the "second core" in the present disclosure) on the skin-facing side and a lower absorbent core 19B (an example of the "first core" in the present disclosure) on the non-skin-facing side.

[0045] The upper absorbent core 19A may be made of, for example, pulp, a super absorbent polymer (SAP; an example of the "first water-absorbing polymer" of the present disclosure), a hydrophilic sheet, or a combination of these. The SAP absorbs liquid in an amount of approximately 10 to 100 times (60 times in this embodiment) its own weight. The SAP is, for example, granular and has a diameter of approximately 0.1 to 0.5 mm before absorbing liquid.

[0046] On the other hand, the lower absorbent core 19B is a pulp mat formed containing fluff pulp (hereinafter referred to as "pulp") obtained by crushing a fibrous material such as softwood.

[0047] The upper absorbent core 19A is provided with a slit 15 (an example of a "first through hole" in the present disclosure) penetrating through the thickness direction at the center of the width direction. The slit 15 extends longitudinally of the upper absorbent core 19A and is located approximately in the center of the width direction of the upper absorbent core 19A. In plan view, the slit 15 has a rectangular shape with both front and rear ends formed into arcs. The front end of the slit 15 is located in the middle of the front body region 1F, and the rear end of the slit 15 is located in the front of the back body region 1R. The slit 15 has a constant width. For example, the width is 20 mm or more and 35 mm or less. The length of the slit 15 is 245 mm or more and 355 mm or less. An absorbent pad 10 with a slit 15 of this size is suitable for adults. In plan view, the slit 15 may be formed in a polygonal or elliptical shape other than a rectangular shape.

[0048] In addition, in the absorbent pad 10, a circled area 20 is defined as a urethral opening contact position where the wearer's urethral opening comes into contact, as shown in Fig. 2(B). The area 20 is located at the center in the width direction of the absorbent pad 10 in the crotch area 1B, and is defined on the top sheet 11. When the absorbent pad 10 is viewed in the thickness direction, the portion overlapping with the region 20 corresponds to the urethral opening. In other words, the portion corresponding to the urethral opening is the urination position. The slit 15 is formed to include the portion corresponding to the urethral opening so that urine excreted by the wearer can easily flow in. When the absorbent pad 10 is viewed from above, the urethral opening contact position and the portion corresponding to the urethral opening are the same position, and are defined as a position 60% of the longitudinal length of the upper absorbent core 19A forward from the rear end of the upper absorbent core 19A. For example, if the longitudinal length of the upper absorbent core 19A is 500 mm, the urethral opening contact position and the portion corresponding to the urethral opening are defined as positions 300 mm forward from the rear end of the upper absorbent core 19A. In addition, if an R-cut is formed by cutting out an arc at both the left and right ends of the crotch region 1B, the length of the R-cut formation area in the front-to-back direction is within 30 mm, and the narrowest part of the upper absorbent core 19A in the width direction is the part where the R-cut is formed, the intersection of a line connecting the left and right ends of the narrowest part and a line passing through the center part of the upper absorbent core 19A in the width direction may be defined as the urethral opening contact position and the part corresponding to the urethral opening.

[0049] Liquids such as urine excreted by the wearer flow and diffuse through the slits 15. Furthermore, liquids such as urine excreted on the upper absorbent core 19A can be guided to the lower absorbent core 19B through the slits 15. In this way, the absorbent pad 10 according to this embodiment can absorb liquids using the absorber 13 having the upper absorbent core 19A and the lower absorbent core 19B.

[0050] The upper absorbent core 19A and the lower absorbent core 19B are covered from the non-skin-facing side by a core wrap sheet 21. More specifically, the core wrap sheet 21 has an upper core wrap sheet 21A and a lower core wrap sheet 21B. The upper core wrap sheet 21A is, for example, an air-through nonwoven fabric and is provided on the skin-facing side of the upper absorbent core 19A. On the other hand, the lower core wrap sheet 21B is, for example, a tissue and covers the lower absorbent core 19B from the non-skin-facing side, and is bonded to the upper core wrap sheet 21A at its widthwise end on the skin-facing side. The upper core wrap sheet 21A and the second sheet 12 are bonded with an HM adhesive, as in the adhesive joint 16. The upper absorbent core 19A, the lower absorbent core 19B, and the core wrap sheet 21 form the absorbent body 13. Furthermore, the top sheet 11, second sheet 12, and upper core wrap sheet 21A in a stacked state are an example of a "laminated sheet" of the present disclosure. Note that the laminated sheet may be any sheet that includes at least the top sheet 11 and the upper core wrap sheet 21A.

[0051] [Absorption performance test of absorbent pad 10] Next, an outline of an absorption performance experiment of the absorbent pad 10 will be illustrated. In the absorption performance experiment, the top sheet 11, second sheet 12, and upper core wrap sheet 21A (hereinafter also referred to as skin-facing laminate sheets) were layered on the skin-facing side of the upper absorbent core 19A of the absorbent pad 10. The fiber diameter, basis weight, thickness, etc. of the top sheet 11, second sheet 12, and upper core wrap sheet 21A were varied to prepare multiple skin-facing laminate sheets with different opening ratios and thicknesses in the layered state. The hydrophilicity of these skin-facing laminate sheets was then measured. The absorption rate of cloudy urine passing through the skin-facing laminate sheet and absorbed into the absorbent core, and the return of cloudy urine absorbed into the absorbent core to the top sheet 11 were also measured. The leakage of SAP contained in the upper absorbent core 19A and the lower absorbent core 19B from the absorbent pad 10 was also measured. These measurements were performed 10 times under the same conditions.

[0052] The upper absorbent core 19A included in the absorbent pad 10 used in the absorption performance experiment contains, for example, pulp and SAP, and the basis weight of the pulp is 280 g / m 2 The basis weight of SAP is 180g / m 2 The lower absorbent core 19B contains, for example, pulp and SAP, and the basis weight of the pulp is 120 g / m 2 The basis weight of SAP is 90g / m 2 The total thickness of the upper absorbent core 19A and the lower absorbent core 19B was set to, for example, 2 cm.

[0053] <Measurement of the opening ratio and thickness of the skin-facing laminated sheet> The skin-side laminate sheet was moistened, and the opening ratio of the entire skin-side laminate sheet in the moistened state as viewed in the thickness direction was measured.

[0054] The opening rate refers to the ratio of the area other than fibers to a unit area when the woven fabric is viewed in a plane. For example, the opening rate can be measured by observing the woven fabric with a digital microscope and calculating the area other than fibers through digital processing.

[0055] The thickness of the skin-facing laminate sheet was measured in a wet state using, for example, a paper gauge PG-10 manufactured by Ozaki Seisakusho (Peacock).

[0056] <Measurement of hydrophilicity of skin-facing laminated sheet> The skin-facing laminate sheet was cut to a width of 25 mm and a length of 180 mm, for example. One end of the sheet was then immersed in water for approximately 10 mm. The height (cm) of water absorbed by the skin-facing laminate sheet in 5 minutes was then measured.

[0057] <Measurement of absorption rate and return rate of cloudy urine> FIG. 3 is an example of a flow chart for an experiment on the absorption rate and return of cloudy urine.

[0058] (S1) In step S1, the absorbent pad 10 to be measured is unfolded so as to be flat.

[0059] (S2) In step S2, marks are made in the widthwise center and the longitudinal center of the top sheet 11 of the absorbent pad 10 that has been laid out flat in step S1.

[0060] (S3) In step S3, the plate 25 is placed on the top sheet 11 so that the mark made on the top sheet 11 in step S2 is at the center. Figure 4 shows an example of the state in which the plate 25 is placed on the top sheet 11. As shown in Figure 4, a circular hole 26 is provided in the center of the plate 25. The plate 25 is positioned so that the mark is centered on the hole 26. The size of the plate 25 is, for example, 150 mm long, 150 mm wide, and 8 mm thick. The size of the hole 26 is, for example, 55 mm in diameter. The weight of the plate 25 is, for example, 1254 g.

[0061] (S4) In step S4, simulated cloudy urine (hereinafter referred to as artificial cloudy urine) is poured into the holes 26 of the plate 25 that was placed on the top sheet 11 in step S3. At this time, the artificial cloudy urine is poured so as to maintain a limit state where it does not overflow from the holes 26. The amount of artificial cloudy urine poured is, for example, 150 ml. The artificial cloudy urine is an example of the "predetermined liquid" of the present disclosure.

[0062] Table 1 illustrates an outline of the composition of artificial cloudy urine. [Table 1]

[0063] Alternatively, the artificial cloudy urine may contain MAP (magnesium ammonium phosphate stones) in addition to the above components. Alternatively, the artificial cloudy urine may contain crystals of salts in urine. Salts are components based on, for example, phosphoric acid or oxalic acid. Alternatively, the artificial cloudy urine may contain cellular components, crystalline components, or fat components in urine, which are the causative agents of cloudy urine. Examples of cellular components include white blood cells and bacteria. Examples of crystalline components include uric acid, calcium phosphate, calcium oxalate, etc. Fat components are, for example, lymph fluid containing fat globules that are formed when lymphatic vessels near the kidneys are blocked. Note that artificial cloudy urine may contain components contained in cloudy urine when the urine becomes cloudy due to ingestion of little water.

[0064] The bentonite shown in Table 1 is, for example, bentonite manufactured by Wako Pure Chemical Industries, Ltd. The particle diameter of such bentonite when dry is, for example, about 2 μm. Bentonite is a rock whose main component is the clay mineral montmorillonite, and contains minerals such as quartz and feldspar as impurities. Montmorillonite, the main component of bentonite, has swelling properties, expanding to several times its original volume when it absorbs water. The unit crystal of montmorillonite is a thin, plate-like (flat) crystal with a thickness of, for example, about 1 nm and a width of 100-1000 nm. In reality, several of these thin, plate-like unit crystals are stacked together to form a single mineral particle.

[0065] (S5) In step S5, the time from when the artificial cloudy urine poured into holes 26 in step S4 begins to be absorbed by top sheet 11 to when absorption ends is measured. This time is defined as the absorption rate of the artificial cloudy urine. After absorption of the artificial cloudy urine ends, plate 25 is removed from top sheet 11.

[0066] (S6) In step S6, with the plate 25 removed from the top sheet 11 in step S5, the absorbent pad 10 is left for 10 minutes. Then, a filter paper (for example, made by ADVANTEC, No. 1640) is placed on the top sheet 11 so that the mark attached to the top sheet 11 in step S2 is at the center. The size of the filter paper is, for example, 10 cm square, and the weight is, for example, 100 g. Then, a weight of, for example, 20 kg is placed on the filter paper. By arranging the weight in this way, the absorbent pad 10 that has absorbed the artificial turbid urine is pressurized in the thickness direction.

[0067] (S7) In step S7, with the weight placed on the filter paper in step S6, the absorbent pad 10 is left for 5 minutes. Then, the weight is removed. And the weight of the filter paper is measured. And the difference between the measured weight of the filter paper and the weight of the filter paper in step S6 is taken as the backflow amount of the artificial turbid urine.

[0068] Also, the absorption rate at which the absorbent pad 10 repeatedly absorbs the artificial turbid urine is measured as follows. That is, with the plate 25 removed from the top sheet 11 in step S5, the absorbent pad 10 is left for 10 minutes. Then, steps S3 to S7 are executed. And the absorption rate at which the absorbent pad 10 repeatedly absorbs the artificial turbid urine in step S5 is calculated.

[0069] <SAP Leakage Measurement> The absorbent pad 10 is spread out flat so that the top sheet 11 faces the ground. Then, the crotch parts at both ends in the width direction of the absorbent pad 10 are held, and it is widened 20 times. And the number of the dropped SAPs is measured.

[0070] FIG. 5 illustrates the results of an absorption performance experiment on the absorbent pad 10 described above. As shown in FIG. 5, SAP leakage was observed when the opening ratio was 30%. Furthermore, when the opening ratio was 25% or less, absorption performance decreased when the thickness of the skin-facing laminate sheet was 10 mm. Furthermore, when the thickness of the skin-facing laminate sheet was 8 mm, absorption performance decreased when the hydrophilicity was 100 cm or less. Furthermore, absorption performance decreased when the hydrophilicity was 100 cm or less under any conditions. Furthermore, when the opening ratio was 20% and the thickness was 8 mm, absorption performance decreased unless the hydrophilicity was 140 cm or more. Furthermore, when the opening ratio was 20% and the thickness was 6 mm, absorption performance decreased unless the hydrophilicity was 120 cm or more. Furthermore, when the opening ratio was 15% and the thickness was 8 mm, absorption performance decreased unless the hydrophilicity was 120 cm or more. Furthermore, when the opening ratio was 15%, absorption performance decreased unless the thickness was 6 mm. In addition, when the opening rate is 10%, if the thickness is 6 mm, the absorbency will decrease unless the hydrophilicity is 120 cm or more. In addition, when the opening rate is 5%, the absorbency will decrease.

[0071] In the column for absorption speed (first time), ◎ indicates a time less than 75 seconds, ○ indicates a time between 75 and 120 seconds, and × indicates a time greater than 120 seconds. However, if even one of the 10 experiments exceeded 200 seconds, it was marked as ×.

[0072] In the column for absorption speed (second time), ◎ indicates less than 120 seconds, ○ indicates 120 seconds or more but less than 150 seconds, and × indicates 150 seconds or more. However, if even one of the 10 experiments exceeded 300 seconds, it was marked as ×.

[0073] In the column for "Return (1st Time)," ◎ indicates less than 4 g, ○ indicates 4 to 10 g, and × indicates 10 g or more. However, × also includes cases where measurement is impossible, such as when the absorption rate is too slow and the specified amount of cloudy urine is not absorbed.

[0074] In the column for "Return (2nd Time)," ◎ indicates less than 23 g, ○ indicates 23 to 27 g, and × indicates 27 g or more. However, × also includes cases where measurement is impossible, such as when the absorption rate is too slow and the specified amount of cloudy urine is not absorbed.

[0075] In addition, in the SAP leakage column, ◎ indicates less than 5 particles, ○ indicates 5 to 15 particles, and × indicates 15 or more particles. However, if more than 15 particles were detected in even one of the 10 experiments, × was recorded.

[0076] In addition, a circle in the pass / fail column indicates that there were no crosses in the evaluations of absorption speed and reversion, and an x ​​in the pass / fail column indicates that there were at least one cross in the evaluations of absorption speed and reversion.

[0077] The results of the absorption performance experiment on the absorbent pad 10 shown in Figure 5 indicated that good absorption performance was achieved when the opening ratio of the skin-facing laminate sheet was 10 to 25%. Furthermore, it was found that the absorption performance was good when the passage rate of artificial cloudy urine through the skin-facing laminate sheet calculated in step S5 was preferably less than 120 seconds for the first absorption and less than 150 seconds for the second absorption, and more preferably less than 75 seconds for the first absorption and less than 120 seconds for the second absorption. Furthermore, in the experimental results shown in Figure 5, when SAP leakage from the absorbent pad 10 was suppressed, the maximum diameter of the circumscribed circle of the openings in the skin-facing laminate sheet as viewed from the skin-facing side was measured and found to be approximately 350 μm. This maximum value was found to be smaller than the particle size (mode) of 360 μm of the SAP contained in the upper absorbent core 19A.

[0078] [Actions and Effects] It has been confirmed that the above-described absorbent pad 10 allows artificial cloudy urine to pass through when the top sheet 11 and the second sheet 12 are stacked together (see FIG. 5). Therefore, it can be said that the cloudy urine is prevented from leaking out of the absorbent pad 10 without being absorbed by the absorber 13.

[0079] Furthermore, with the absorbent pad 10 described above, when SAP leakage from the absorbent pad 10 is suppressed in the experimental results shown in Figure 5, the maximum diameter of the circumscribed circle of the opening when the skin-facing laminate sheet is viewed from the skin-facing side is smaller than the particle diameter (mode) of 360 µm of the SAP contained in the upper absorbent core 19A. Therefore, if an absorbent pad 10 is manufactured under these conditions, SAP is prevented from leaking to the skin-facing side of the top sheet 11. This prevents a decrease in the absorption performance of the absorbent pad 10.

[0080] Furthermore, in the absorbent pad 10 described above, the top sheet 11 and the second sheet 12 are bonded via adhesive sections 16 in a spiral HM pattern. This reduces the number of non-bonded areas in the CD direction (the direction perpendicular to the manufacturing flow direction), and also reduces the possibility that the adhesive sections 16 will crush the openings, which are the gaps between the fibers contained in the laminated top sheet 11 and second sheet 12.

[0081] Furthermore, in the absorbent pad 10 described above, the upper absorbent core 19A included in the absorber 13 is provided with slits 15. This facilitates the flow of cloudy urine that has penetrated from the skin-facing side into the lower absorbent core 19B through the slits 15. The lower absorbent core 19B is made of a pulp pad. This facilitates the diffusion of moisture contained in the cloudy urine in the planar direction, including the longitudinal and width directions, in the lower absorbent core 19B. The moisture thus diffused then enters the upper absorbent core 19A and is retained in the SAP. This allows all parts of the upper absorbent core 19A to retain the moisture contained in the cloudy urine evenly, thereby accelerating the absorption rate of the cloudy urine. This prevents the cloudy urine that has passed through the top sheet 11 and second sheet 12 from returning to the skin-facing side before being absorbed by the upper absorbent core 19A.

[0082] Furthermore, in the absorbent pad 10 described above, the slits 15 extend to a position corresponding to the wearer's urethral opening. This increases the amount of cloudy urine excreted by the wearer that reaches the lower absorbent core 19B without passing through the upper absorbent core 19A. This also prevents cloudy urine from returning to the skin side before being absorbed by the upper absorbent core 19A.

[0083] Furthermore, in the absorbent pad 10 described above, the slits 15 extend in the longitudinal direction. This allows cloudy urine to be dispersed throughout the entire absorbent core. This improves the absorption efficiency of cloudy urine. This prevents cloudy urine from leaking outside the absorbent pad 10.

[0084] [First Modification] FIG. 6 is an example of a cross-sectional view of an absorbent pad 10A according to a first modified example, taken along a plane perpendicular to the longitudinal direction.

[0085] The absorbent pad 10A according to the first modification has the same configuration as the absorbent pad 10 according to the embodiment, but also has a back sheet 14 laminated on the non-skin-facing side of the absorber 13A. The back sheet 14 is made of a liquid-impermeable material that does not allow liquids such as urine to pass through. For example, a liquid-impermeable film made of polyethylene resin is used for the back sheet 14. Note that the back sheet 14 may be made of a microporous polyethylene film having a plurality of fine pores of 0.1 to 4 μm formed therein in order to obtain breathability that prevents stuffiness when worn while maintaining liquid impermeability.

[0086] In the absorbent pad 10A according to the first modification, an upper absorbent core 19C (an example of a "second core" in the present disclosure) and a lower absorbent core 19D (an example of a "first core" in the present disclosure) are provided with a slit 15C (an example of a "first through-hole" in the present disclosure) and a slit 15D (an example of a "recess" and a "second through-hole" in the present disclosure), respectively, which penetrate the upper absorbent core 19C (an example of a "second core" in the present disclosure) in the thickness direction. The slits 15C and 15D are provided at the center in the width direction and are connected to each other by overlapping in the thickness direction. The slits 15C and 15D also extend longitudinally to a position corresponding to the wearer's urethral opening.

[0087] [Actions and Effects] The absorbent pad 10A described above allows a portion of the cloudy urine excreted by the wearer to pass further away from the lower absorbent core 19D toward the non-skin-facing side. Furthermore, a tissue, which is the lower core wrap sheet 21B, is placed on the non-skin-facing side of the lower absorbent core 19D. Therefore, the cloudy urine penetrates the tissue and can be diffused throughout the entire surface. This increases the efficiency with which the absorbent core absorbs the cloudy urine. This prevents the cloudy urine from leaking from the absorbent pad 10A.

[0088] Furthermore, in the absorbent pad 10A described above, the lower absorbent core 19D is provided with slits 15D instead of grooves. This prevents solid components contained in cloudy urine from collecting at the bottom of the grooves and from clogging the gaps between the materials forming the side walls of the grooves. This ensures good long-term absorption of urine from the slits 15D into the lower absorbent core 19D.

[0089] [Second Modification] FIG. 7 is an example of a cross-sectional view of an absorbent pad 10B according to a second modification taken along a plane perpendicular to the longitudinal direction.

[0090] The absorbent pad 10B according to the second modification has a similar configuration to the absorbent pad 10A according to the first modification. However, the width of a slit 15F (an example of a "recess" in the present disclosure) provided in a lower absorbent core 19F (an example of a "first core" in the present disclosure) of the absorbent pad 10B is narrower than the width of a slit 15E (an example of a "first through-hole" in the present disclosure) provided in an upper absorbent core 19E (an example of a "second core" in the present disclosure). A SAP 22 (an example of a "second water-absorbent polymer" in the present disclosure) is laminated between the upper absorbent core 19E and the lower absorbent core 19F, in the region surrounding the slit 15E. The SAP 22 is covered with a liquid-permeable member 23 (e.g., tissue).

[0091] [Actions and Effects] In the absorbent pad 10B described above, the SAP 22 expands as it absorbs urine, preventing urine absorbed in the lower absorbent core 19F from rapidly penetrating into the upper absorbent core 19E. This prevents cloudy urine that cannot be retained by the upper absorbent core 19E from returning to the skin-facing side.

[0092] Furthermore, with the absorbent pad 10B as described above, SAP 22 expands to increase the overall depth of slits 15E and 15F, thereby preventing slits 15E and 15F from being blocked by solid components contained in cloudy urine.

[0093] Furthermore, in the absorbent pad 10B described above, the width of the slit 15F is narrower than the width of the slit 15E, which prevents the SAP 22 from spilling into the slit 15F and prevents the slit 15F from being blocked by solid components contained in cloudy urine.

[0094] [Third Modification] FIG. 8 is an example of a cross-sectional view of an absorbent pad 10C according to a third modification taken along a plane perpendicular to the longitudinal direction.

[0095] The absorbent pad 10C according to the third modification has the same configuration as the absorbent pad 10B according to the second modification. However, in the absorbent pad 10C, grooves 24 (an example of the "recess" and "groove" of the present disclosure) that do not penetrate through the absorbent pad in the thickness direction are provided in the lower absorbent core 19H (an example of the "first core" of the present disclosure) instead of the slits 15F. Furthermore, the width of the upper absorbent core 19E is wider than the width of the lower absorbent core 19H.

[0096] [Actions and Effects] The absorbent pad 10C described above prevents the grooves 24 from being blocked by solid components contained in cloudy urine. Furthermore, even if SAP 22 spills into the grooves 24, the SAP 22 is prevented from flowing out of the lower absorbent core 19H toward the non-skin-facing side. This prevents the water content of cloudy urine held in the SAP 22 from leaking to the outside.

[0097] However, because cloudy urine contains solid components, these solid components may get stuck in the gaps between the materials forming the sides or bottom of the grooves 24. As a result, cloudy urine that has entered the grooves 24 may return to the skin-facing side without being absorbed by the lower absorbent core 19H. However, with the absorbent pad 10C described above, a step is provided in the width direction between the upper absorbent core 19E and the lower absorbent core 19H. This allows cloudy urine to enter the step and then reach the upper absorbent core 19E or the lower absorbent core 19H. This prevents the cloudy urine from returning to the skin-facing side.

[0098] <Absorption rate test and wearing operation test> Next, we conducted an absorption rate test for artificial cloudy urine in the absorbent pads 10A to 10C according to the first to third modifications, in which the upper absorbent core had a slit penetrating through its thickness and the lower absorbent core had a slit penetrating through its thickness or a groove that did not penetrate through its thickness. More specifically, we prepared an absorbent pad having an upper absorbent core and a lower absorbent core with dimensions of, for example, a width of 160 mm, a length of 550 mm, and a thickness of 10 mm. An experiment similar to the above-described cloudy urine absorption rate test was then conducted to measure the absorption rate. We also conducted a wearing experience test in which subjects wore the absorbent pad and performed a sensory evaluation to determine whether the wearer felt any discomfort. These absorption rate tests and wearing experience tests were each conducted 10 times.

[0099] Figure 9 shows an example of the summary of the results of the absorption rate test and the wearing operation test. A circle in the column indicates that the first absorption rate was less than 12 seconds, a black circle indicates that artificial cloudy urine overflowed from the longitudinal direction of the absorbent core during the absorption rate test, and an × indicates that the first absorption rate was 12 seconds or more.

[0100] In addition, a circle in the wearing action column indicates that the wearer did not feel any discomfort 7 or more times out of 10 times they performed the action, and an × indicates that the wearer felt discomfort 4 or more times out of 10 times they performed the action.

[0101] In addition, a circle in the pass / fail column indicates that there were no circles or crosses in the evaluation of absorption speed and wearing operation. An x in the pass / fail column indicates that there was at least one circle or cross in the evaluation of absorption speed and wearing operation.

[0102] Furthermore, when the depth is stated as 10 mm, it means that a slit is provided that penetrates the absorbent core (thickness 10 mm), and when the depth is stated as less than 10 mm, it means that a groove having that depth that does not penetrate the absorbent core is provided.

[0103] As shown in Figure 9, when a slit penetrating through the thickness direction was provided in both the upper and lower layers (depth 10 mm) and the slit width of both the upper and lower layers was 45 mm or more (No. 1-3), the mounting operation was evaluated as × in both cases and the product was rejected.

[0104] In addition, when slits were provided through both the upper and lower layers in the thickness direction and the slit width was 40 mm (No. 4-6), the slit length was passed when it was 100 to 350 mm, but failed when the slit length was 400 mm.

[0105] In addition, when slits were provided in both the upper and lower layers penetrating in the thickness direction and the slit widths were 30 to 35 mm in both the upper and lower layers (No. 7-10), the test was passed.

[0106] In addition, when slits were provided through the thickness direction in both the upper and lower layers and the slit width was 25 mm in both the upper and lower layers (No. 11-13), the test was passed when the slit length was 130 to 400 mm, but failed when the slit length was 100 mm.

[0107] In addition, when slits were provided through both the upper and lower layers in the thickness direction and the slit width was 20 mm for both the upper and lower layers (No. 14-16), the test was passed when the slit length was 180 to 400 mm, but failed when the slit length was 150 mm.

[0108] In addition, when slits were provided through the thickness direction in both the upper and lower layers and the slit width was 15 mm in both the upper and lower layers (No. 17-19), the test was passed when the slit length was 250 to 400 mm, but failed when the slit length was 200 mm.

[0109] In addition, when slits were provided in both the upper and lower layers penetrating in the thickness direction and the slit width was 10 mm in both the upper and lower layers (No. 20), the test was rejected.

[0110] In addition, when the upper absorbent core had a slit penetrating through the thickness direction and the lower absorbent core had a groove that did not penetrate through the thickness direction (No. 21-23), if the depth of the lower groove was 6 mm, the width was 50 mm, and the groove length was 250 to 400 mm, it passed.

[0111] In addition, when the upper absorbent core had a slit penetrating through the thickness direction and the lower absorbent core had a groove that did not penetrate through the thickness direction (No. 24-26), if the depth of the lower groove was 6 mm, the width was 40 mm, and the length of the groove was 250 to 400 mm, it passed.

[0112] In addition, when the upper absorbent core had a slit penetrating through the thickness direction and the lower absorbent core had a groove that did not penetrate through the thickness direction, and the groove depth of the lower layer was 6 mm and the width was 35 mm (No. 27), it was rejected.

[0113] In addition, when the upper absorbent core had a slit penetrating through the thickness direction and the lower absorbent core had a groove that did not penetrate through the thickness direction, and the depth of the groove in the lower layer was 3 mm (No. 28), it was rejected.

[0114] From these results, when the upper absorbent core is provided with a slit penetrating through its thickness and the lower absorbent core is provided with a slit penetrating through its thickness or a groove not penetrating through its thickness, as in the absorbent pads 10A to 10C according to the first to third modifications, it can be said that the total depth of the slit in the upper absorbent core and the groove in the lower absorbent core is preferably 16 to 20 mm, the width 15 to 50 mm, and the length 100 to 400 mm. Note that if the total depth is 20 mm, the lower absorbent core will have a slit rather than a groove. Furthermore, it can be said that the total depth of the slit in the upper absorbent core and the slit in the lower absorbent core is more preferably 20 mm, the width 30 to 35 mm, and the length 100 to 400 mm.

[0115] [Fourth Modification] The absorbent pad 10D according to the fourth modification has a structure similar to that of the absorbent pad 10 according to the embodiment (see FIG. 2). However, in the absorbent pad 10D, the components contained in the upper absorbent core 19A and the lower absorbent core 19B are reversed from those in the absorbent pad 10 according to the embodiment. That is, the upper absorbent core 19A is, for example, a pulp pad, while the lower absorbent core 19B contains, for example, pulp and SAP.

[0116] [Actions and Effects] In the absorbent pad 10D described above, cloudy urine is retained more in the lower absorbent core 19B containing SAP than in the upper absorbent core 19A which is a pulp mat. Therefore, even when the upper absorbent core 19A is pressed from the skin-facing side, the force acting on the lower absorbent core 19B which retains the cloudy urine is reduced. This prevents the cloudy urine retained in the lower absorbent core 19B from returning to the skin-facing side. This prevents the cloudy urine from leaking from the absorbent pad 10D.

[0117] [Fifth Modification] Fig. 10 illustrates an outline of an absorbent pad 10E according to a fifth modified example. The absorbent pad 10E according to the fifth modified example has the same configuration as the absorbent pad 10C according to the third modified example shown in Fig. 8. However, in the absorbent pad 10E, the width of the slit 15I provided in the upper absorbent core 19I is narrower than the width of the groove 24 provided in the lower absorbent core 19H.

[0118] [Actions and Effects] With the absorbent pad 10E described above, even if solid components contained in cloudy urine get stuck in the gaps between the materials forming the sides of the grooves 24 of the lower absorbent core 19H, the solid components are less likely to accumulate on the lower side of the upper absorbent core 19I because it is on the lower side in the direction of gravity. This allows the upper absorbent core 19I to absorb the water contained in the cloudy urine. This prevents the cloudy urine from leaking from the absorbent pad 10E.

[0119] <Other variations> The structure of the absorbent pad 10 according to the above embodiment can be applied to the main body of a diaper 1, sanitary napkins, etc. The adhesive portions 16 may be provided continuously without being spaced apart from each other in the width direction. The shape of the adhesive portions 16 is not limited to a spiral shape, and may be provided linearly in the longitudinal direction, for example. The second sheet 12 is not provided, and the top sheet 11 and the upper core The laminated sheet on which the ARUP sheet 21A is laminated may have the above-mentioned opening ratio. Furthermore, other than the second sheet 12, the laminated sheet may be laminated on the skin-facing side of the absorbent body 13. Furthermore, the absorbent body 13 may be provided with a single layer of absorbent core. Furthermore, the slits 15 may not be provided, or may be provided without extending longitudinally to the area corresponding to the urethral opening. Furthermore, while the above-mentioned embodiment and modified examples illustrate the effects when cloudy urine is excreted by the wearer, similar effects are also achieved when excreted liquids such as watery stools containing solid components or sweat containing salt crystals are excreted by the wearer.

[0120] The embodiments and modifications disclosed above can be combined with each other. [Explanation of symbols]

[0121] 1B: Inseam area 1F: Front body area 1R: Back area 7L, 7R: Side seats 7LA, 7RA: Fixed end 7LB, 7RB: Free end 8L, 8R: Elastic thread 10: Absorbent pad 11: Top sheet 12: Second seat 13: Absorbent 14: Back seat 15: Slit 16: Adhesive part 19A, 19C, 19E: Upper absorbent core 19B, 19D, 19F, 19H: Lower absorbent core 20: area 21: Core wrap sheet 21A: Upper core wrap sheet 21B: Lower core wrap sheet 23: Liquid-permeable material 24: Groove 25: Board 26 :hole 30L, 30R: 3D gathers 32L, 32R: Adhesive application area

Claims

1. an absorbent core containing a first water-absorbing polymer and capable of absorbing liquid excreted by a wearer; a laminated sheet formed by laminating a plurality of sheets and disposed closer to the skin than the absorbent core; The laminated sheet has adhesive portions where the plurality of sheets are bonded to each other with an adhesive, The laminated sheet is configured to include at least a top sheet that contacts the wearer's skin and a core wrap sheet that wraps the absorbent core, The laminated sheet has an opening ratio in the thickness direction of 10 to 25%; the maximum value of the diameter of the circumscribed circle of the openings of the laminated sheet is smaller than the mode of the particle diameter of the first water-absorbing polymer; Absorbent articles.

2. an absorbent core containing a first water-absorbing polymer and capable of absorbing liquid excreted by a wearer; a laminated sheet formed by laminating a plurality of sheets and disposed closer to the skin than the absorbent core; The laminated sheet has adhesive portions where the plurality of sheets are bonded to each other with an adhesive, The rate at which a predetermined liquid passes through the laminate sheet is such that the first absorption rate is less than 120 seconds and the second absorption rate is less than 150 seconds, the maximum value of the diameter of the circumscribed circle of the openings of the laminated sheet is smaller than the mode of the particle diameter of the first water-absorbing polymer; Absorbent articles.

3. A plurality of the adhesive portions are provided, and the adhesive portions are spaced apart from each other. The absorbent article according to claim 1 or 2.

4. Each of the plurality of adhesive portions extends spirally around an axis extending in the longitudinal direction of the absorbent article. The absorbent article of claim 3.

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