CN117942226A - Absorbent article - Google Patents

Abstract

The invention provides an absorbent article capable of inhibiting the change of wearing feeling before and after absorption and inhibiting uncomfortable feeling when wearing. The absorbent article has: an absorber; a surface sheet which is disposed closer to the skin than the absorber and is in contact with the wearer; and a back sheet disposed on the non-skin side of the absorber. When the ratio of the length in the width direction of the absorbent article after the force is applied to the absorbent article from both outer sides in the width direction of the absorbent article and the force is removed to the length in the width direction of the absorbent article before the force is applied is set to a width recovery rate, the difference between the width recovery rate in the dry state before the absorbent article absorbs body fluid and the width recovery rate in the wet state after the absorbent article absorbs 30ml of body fluid is 10% or less.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a light incontinence pad or a sanitary napkin.

Background

Patent document 1 discloses an absorbent article that can be fixed to the skin surface of a wearing article. The absorbent article of patent document 1 is fixed to the skin side of the wearing article by an adhesive provided on the back sheet. The outer side of the absorbent article is provided with a pressing portion that compresses the absorbent body in the thickness direction. The pressing portion extends in the front-rear direction across the crotch region. When an external force is applied to the outer side portion of the absorbent article by the leg or the like at the time of wearing, the deformation can be suppressed by the pressing portion against the external force.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication 2016-049197

Disclosure of Invention

However, the absorbent article of patent document 1 has the following problems. The pressed portion is formed in the absorbent body having fluff pulp, and the absorbent body is deformed by absorbing body fluid, and the rigidity of the absorbent body may not be maintained continuously. As a result of intensive studies, the applicant has found that if the wearing sensation of the absorbent article changes due to changes in the rigidity of the absorbent body before and after absorption, discomfort due to the change in the wearing sensation occurs for some users.

In particular, in recent years, small absorbent articles such as thin absorbent articles and wingless absorbent articles have tended to be preferred, and in small absorbent articles, the wearing feeling before and after absorption is more likely to change, and the uncomfortable feeling is likely to occur.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article that can suppress a change in the sense of wearing before and after absorption and can suppress discomfort during wearing.

Solution for solving the problem

An absorbent article according to one embodiment comprises: an absorber; a surface sheet which is disposed closer to the skin than the absorber and is in contact with the wearer; and a back sheet disposed on the non-skin side of the absorber. When the ratio of the length in the width direction of the absorbent article after the force is applied to the absorbent article from both outer sides in the width direction of the absorbent article and the force is removed to the length in the width direction of the absorbent article before the force is applied is set to a width recovery rate, the difference between the width recovery rate in the dry state before the absorbent article absorbs body fluid and the width recovery rate in the wet state after the absorbent article absorbs 30ml of body fluid is 10% or less.

Drawings

Fig. 1 is a schematic plan view of an absorbent article according to an embodiment as seen from the skin side.

Fig. 2 is a schematic plan view of the absorbent article according to the embodiment as viewed from the non-skin side.

Fig. 3 is a schematic cross-sectional view along the line A-A shown in fig. 1.

Fig. 4 is a diagram for explaining a method of measuring the width recovery rate.

Description of the reference numerals

1. An absorbent article; 10. a surface sheet; 11. a center piece; 12. a side panel; 20. a back sheet; 30. an absorbent structure; 31. an absorber; 36. 1 st non-woven fabric; 37. nonwoven fabric 2 (middle sheet); 35. a superabsorbent polymer; 33. core cladding (folded back sheet); 331. region 1; 332. region 2; 39. a second sheet; 60. a fixing part; 80. an extrusion part; 81. front and rear pressing parts; 82. a dot-shaped pressing part; s1, a crotch area; s2, a front side area; s3, a rear side area; l, front-back direction; w, width direction.

Detailed Description

(1) Summary of the embodiments

At least the following matters are clarified from the description of the present specification and the drawings.

The invention of embodiment 1 is an absorbent article. The absorbent article has: an absorber; a surface sheet which is disposed closer to the skin than the absorber and is in contact with the wearer; and a back sheet disposed on the non-skin side of the absorber. When the ratio of the length in the width direction of the absorbent article after the force is applied to the absorbent article from both outer sides in the width direction of the absorbent article and the force is removed to the length in the width direction of the absorbent article before the force is applied is set to a width recovery rate, the difference between the width recovery rate in the dry state before the absorbent article absorbs body fluid and the width recovery rate in the wet state after the absorbent article absorbs 30ml of body fluid is 10% or less. According to this aspect, the difference between the width recovery rate before absorbing body fluid and the width recovery rate after absorbing body fluid is small, so that the change in the feeling of wearing before and after absorbing is small, and the uncomfortable feeling caused by the change in the feeling of wearing can be suppressed.

According to a preferred embodiment, the invention of embodiment 2 may have the following features in the invention of embodiment 1. The width recovery rate in the dry state is higher than the width recovery rate in the wet state. According to this aspect, since the width recovery rate in the dry state (state before absorbing the body fluid) is high, the length of the absorber in the width direction before the body fluid is discharged can be suppressed from being shortened, and the body fluid can be absorbed by the absorber disposed widely. Therefore, the absorption performance of the absorbent article can be maintained. Further, by absorbing the body fluid in a wide range of the absorber, it is possible to suppress a decrease in the rigidity of the absorber caused by the absorption of the body fluid locally, and to suppress a change in the wearing sensation when absorbing the body fluid.

According to a preferred embodiment, the invention of embodiment 3 may have the following features in the invention of embodiment 1 or embodiment 2. The wet state has a width recovery rate of 80% or more. According to this aspect, even when the absorbent article is used for a long period of time after body fluid is absorbed, the length in the width direction of the absorbent article can be continuously ensured, discomfort during wearing can be suppressed, the length in the width direction of the absorbent body can be ensured, and the absorption performance can be maintained.

According to a preferred embodiment, the invention of embodiment 4 may have the following features in any of embodiments 1 to 3. The width recovery rate in the dry state is 95% or more. According to this aspect, the length of the absorbent article in the width direction is recovered with little change by the application of external force before absorbing body fluid. The length of the absorber in the width direction can be ensured while suppressing discomfort during wearing, and the absorption performance can be maintained.

According to a preferred embodiment, the invention of embodiment 5 may have the following features in any of embodiments 1 to 4. The absorbent article is a thin absorbent article having a thickness of 8mm or less, or a wingless absorbent article having no wings which are fixed to the non-skin side of the wearing article when worn. The thin absorbent article has a small thickness and it is difficult to ensure rigidity. In addition, compared to the winged absorbent article, the wingless absorbent article has no portion folded back with respect to the wearing article, and therefore it is difficult to secure rigidity. In the absorbent article, the uncomfortable feeling can be suppressed by suppressing the change in the wearing feeling before and after absorption.

According to a preferred embodiment, the invention of embodiment 6 may have the following features in any of embodiments 1 to 5. The absorber is composed of a super absorbent polymer and a nonwoven fabric holding the super absorbent polymer. An absorbent body comprising a nonwoven fabric and a superabsorbent polymer is less likely to be twisted and wrinkled than an absorbent body comprising pulp. In addition, the super absorbent polymer swells after absorbing body fluid, thereby improving elasticity, and the shape of the absorber is easily recovered when an external force is applied. Therefore, the absorber can be prevented from twisting, and the rigidity and the absorption performance of the absorbent article can be maintained.

According to a preferred embodiment, the invention of embodiment 7 may have the following features in the invention of embodiment 6. The nonwoven has an airlaid nonwoven with pulp. According to the air-laid nonwoven fabric containing pulp, the structure of the nonwoven fabric is less likely to change before and after absorbing body fluid than an absorbent core having only fluff pulp laminated thereto, and the change in the feeling of wearing before and after absorption can be further suppressed. In addition, the water absorption of body fluid can be improved by the pulp constituting the nonwoven fabric.

According to a preferred embodiment, the invention of embodiment 8 may have the following features in the invention of embodiment 6 or embodiment 7. The nonwoven fabric has an intermediate sheet disposed between a skin-side region of the absorber including a skin surface and a non-skin-side region of the absorber including a non-skin surface in a thickness direction. The intermediate sheet has non-absorbent fibers. The non-water-absorbent fibers are less likely to swell by absorbing water and soften after the body fluid is absorbed by the absorbent body. Therefore, the nonwoven fabric containing the non-water-absorbent fibers is not easily deformed even after absorbing body fluid. Therefore, the wearing feeling changes little before and after absorbing body fluid, and the uncomfortable feeling caused by the wearing feeling changes can be suppressed.

According to a preferred embodiment, the invention of embodiment 9 may have the following features in the invention of embodiment 8. The absorbent article has a folded-back sheet that covers the non-skin side of the intermediate sheet and the superabsorbent polymer, and is folded back around the outer edge of the intermediate sheet as a base point to cover the skin side of the intermediate sheet and the superabsorbent polymer. The folded back sheet is composed of an airlaid nonwoven fabric containing pulp and non-absorbent fibers. According to this aspect, the superabsorbent polymer can be held by the intermediate sheet, and the intermediate sheet and the superabsorbent polymer can be wound up and held by the folded-back sheet, so that deformation of the absorbent body can be suppressed. Therefore, the length in the width direction of the absorbent article can be ensured more easily, the uncomfortable feeling at the time of wearing can be suppressed, the length in the width direction of the absorber can be ensured, and the absorption performance can be maintained. In addition, the folded back sheet is also an airlaid nonwoven fabric having pulp, and thus is not easily deformed even after absorbing body fluid. Therefore, the wearing feeling changes little before and after absorption, and the uncomfortable feeling caused by the change in wearing feeling can be suppressed.

(2) Overall outline structure of absorbent article

Hereinafter, an absorbent article 1 according to an embodiment will be described with reference to the drawings. Fig. 1 is a schematic plan view of an absorbent article according to an embodiment, as seen from the skin side. Fig. 2 is a schematic plan view of the absorbent article according to the embodiment, as seen from the non-skin side. Fig. 3 is a cross-sectional view taken along line A-A shown in fig. 1. In fig. 3, for convenience of explanation, each member constituting the absorbent article is partially separated in the thickness direction, but in an actual product, there is a portion where each member is joined. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic, the proportion of each dimension, etc. are different from reality. Therefore, specific dimensions and the like should be judged with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and proportions from each other.

The absorbent article 1 may be an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad or a faecal pad. The absorbent article 1 may be an article worn as underwear. The absorbent article 1 of the embodiment is a light incontinence pad. The absorbent article 1 is an absorbent article whose main purpose is to absorb urine, unlike sanitary napkins, and whose main purpose is not to absorb menstrual blood, unlike leucorrhea pads. The absorbent material of the absorbent article 1 is mainly a superabsorbent polymer 35. The content (wt%) of the superabsorbent polymer in the absorbent body of the absorbent article 1 is 25% or more of the entire absorbent body.

The absorbent article 1 has a front-back direction L and a width direction W orthogonal to each other, and has a thickness direction T extending from a skin side T1 to a non-skin side T2 of the wearer. The skin side T1 corresponds to the side facing the skin of the wearer in use. The non-skin side T2 corresponds to the side opposite to the skin side T1, i.e., the side opposite to the skin of the wearer in use. The absorbent article 1 has a crotch region S1, a front side region S2, and a rear side region S3. The crotch region S1 is a region disposed to face a excretory opening of the wearer, for example, a excretory opening such as a urination opening. When the absorbent article 1 is worn on an undergarment, the crotch region S1 is a region disposed in the crotch portion of the undergarment and between the legs of the wearer. The crotch region S1 may be, for example, a region located in the center of a region obtained by trisecting the absorbent article 1 in the front-rear direction L, or a region provided with a narrowed portion in which the outer edge of the absorbent body or the absorbent article is provided with a narrowed portion. The front region S2 is located on the front side of the crotch region S1. The rear side region S3 is located rearward of the crotch region S1. The crotch region S1 may be formed by a region sandwiched by notches 90 described later in the front-rear direction L.

In the present invention, the outer side portion means a portion that includes an outer edge in the width direction W and occupies a certain range in the width direction W, and the outer edge means an outer edge in the width direction W. The outer edge of the constituent member that occupies a certain range in the front-rear direction is an edge obtained by integrally connecting points located outside the constituent member in the width direction W to the constituent member. The inner side in the present invention means a portion that includes an inner edge in the width direction W and occupies a certain range in the width direction W, and the inner edge means an inner edge in the width direction W. The inner edge of the constituent member that occupies a certain range in the front-rear direction is an edge obtained by integrally connecting points located on the inner side in the width direction W in the constituent member to the constituent member. In the present invention, the front end portion and the rear end portion are portions that include edges in the front-rear direction L and occupy a certain range in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer end portion includes a front end portion and a rear end portion, and the outer end edge includes a front end edge and a rear end edge. The inner side edge is an edge including an inner side edge and extending in the front-rear direction L. The outer side edge is an edge including an outer side edge and extending in the front-rear direction L. In the present specification, the term "along the front-rear direction L" means a direction having an angle smaller than 45 ° with respect to the front-rear direction L, and the term "along the width direction W" means a direction having an angle smaller than 45 ° with respect to the width direction W.

The absorbent article 1 may have at least an absorbent structure 30, a front sheet 10, a back sheet 20, and a pressing portion 80. The topsheet 10 is disposed closer to the skin side T1 than the absorbent structure 30 (absorber 31) and contacts the wearer. The topsheet 10 may have: a center sheet 11 overlapping the widthwise center of the absorbent structure 30; and a side sheet 12 that is positioned closer to the skin side T1 than the center sheet 11 and overlaps with an outer side portion of the center sheet 11 in the width direction W. The side sheet 12 may be disposed closer to the skin side T1 than the center sheet 11. In the modification, the front sheet 10 may be formed of 1 sheet without the center sheet 11 and the side sheets 12. The side panels 12 may constitute leakage preventing gathers 70 that stand up when worn. The center sheet 11 and the side sheets 12 may be made of nonwoven fabric, or at least the center sheet 11 may have liquid permeability, and the surfaces of the side sheets 12 may be subjected to a hydrophobic treatment.

The center sheet 11 of the present embodiment is made of a hot air nonwoven fabric, and the side sheets 12 may be SMS nonwoven fabrics. The outer edge of the side sheet 12 may be located at the outer edge of the absorbent article 1, and the inner edge of the side sheet 12 may be located at a position outside the outer edge of the central region S11 in the width direction W, and may be located at a position outside the outer edge of the pressing portion 80 in the width direction W, and may overlap with the outer portion of the absorbent structure 30. The outer edge of the center piece 11 may be located outside the outer edge of the center area S11 in the width direction W, and may be located outside the outer edge of the pressing portion 80 in the width direction W.

The top sheet 10 may be provided with protrusions (not shown) protruding toward the skin side and recesses (not shown) disposed between the protrusions. The convex portions and concave portions may be formed by regions having different weights per unit area of fibers constituting the topsheet 10, or may be formed by compressing the topsheet 10 in the thickness direction T. The convex portions and the concave portions may be alternately formed adjacently in the front-rear direction L and alternately formed adjacently in the width direction W. The convex portions and the concave portions form a plurality of deformation base points on the surface sheet 10, and the surface sheet 10 is flexibly deformed, so that the absorbent article 1 is easily along the body.

The back sheet 20 is disposed closer to the non-skin side T2 than the absorbent structure 30 (absorber). The back sheet 20 is disposed over the entire region of the absorbent article 1, and is provided at a position closest to the non-skin side in the thickness direction T of the absorbent article 1. The back sheet 20 may be made of a film having liquid impermeability. The back sheet 20 may be provided with a fixing portion 60 on a non-skin surface thereof, and the fixing portion 60 may fix the absorbent article 1 to a wearing article. The fixing portion 60 may be provided at least in a region overlapping the absorber 31. An adhesive or mechanical hook may be provided at the fixing portion 60. The fixing portions 60 of the present embodiment are disposed at intervals in the width direction W while extending in the front-rear direction L, and are disposed two on each side of the absorbent article across the center in the width direction W. The outer edge of the fixing portion 60 (the outer edge of the fixing portion 60 located at the outermost side in the width direction) may be located at a position further outward in the width direction W than the outer edge of the pressing portion 80, may be located at a position further inward in the width direction W than the outer edge of the absorber 31, and may be located at a position further inward in the width direction than the inner edge of the side sheet 12.

The absorbent article 1 may have leakage preventing gathers 70 that can stand up on the side portions in the width direction W of the absorbent article 1. The leakage preventing gather 70 has: a contraction portion 71 capable of being raised by contraction of the leakage preventing elastic member 74; a front-rear base point (not shown) which is located outside the constricted portion in the front-rear direction L and serves as a standing base point of the constricted portion 71; and a width base point 73 that is located outside the constricted portion 71 in the width direction W and becomes a standing base point of the constricted portion 71. More specifically, as shown in fig. 3, the inner side portion of the side sheet 12 is folded, and the leakage preventing elastic member 74 is disposed on the side sheet 12 in a state of being elongated in the front-rear direction L. In the region where the side sheet 12 is not joined to the center sheet 11, the leak-proof elastic member 74 is contracted to rise toward the wearer. The front-rear base point is an inner end edge of a region where the side sheet 12 is joined to the center sheet 11 at a position outside in the front-rear direction L than the contracted portion 71. The width base point 73 is an inner edge of a region where the side sheet 12 is joined to the center sheet 11 at a position outside the contracted portion 71 in the width direction W.

The absorbent structure 30 is disposed between the front sheet 10 and the back sheet 20. The absorbent structure 30 is configured to include at least 1 absorbent member. The absorbent member has at least one of a function of retaining body fluid and a function of diffusing body fluid. The absorbent member of the present embodiment includes an absorbent body 31 containing an absorbent material, a core wrap 33 covering the absorbent body, and a second sheet 39. The absorber 31 and the core wrap 33 have both the function of retaining body fluid and the function of diffusing body fluid. The second sheet 39 does not have a function of retaining body fluid, but has a function of diffusing body fluid.

The absorber 31 contains an absorbent material. The absorbent material can be exemplified by pulp and superabsorbent polymers. The absorbent body of the present embodiment may have a super absorbent polymer 35 as an absorbent material and a nonwoven fabric holding the super absorbent polymer 35. The absorber 31 may have a super absorbent polymer 35 as an absorbent material for absorbing body fluid. In the present embodiment, only the superabsorbent polymer 35 is used as the absorbent material sandwiched between the plurality of sheet members, but in other embodiments, an absorbent material other than the superabsorbent polymer 35 (pulp that is not formed into a sheet) may be provided between the plurality of sheet members. The nonwoven fabric holding the superabsorbent polymer 35 may be at least 1 sheet, but may be a plurality of sheets as in the present embodiment. The plurality of nonwoven fabrics may include a1 st nonwoven fabric 36 and a 2 nd nonwoven fabric 37 positioned on the non-skin side T2 of the 1 st nonwoven fabric 36. The superabsorbent polymer 35 may be disposed between the 1 st nonwoven fabric 36 and the 2 nd nonwoven fabric 37 and between the 2 nd nonwoven fabric 37 and the core wrap 33. The 2 nd nonwoven fabric 37 may be disposed between a skin-side region including a skin surface of the absorber 31 and a non-skin-side region including a non-skin surface of the absorber 31 in the thickness direction T, and constitutes the "intermediate sheet" of the present invention. The skin-side region and the non-skin-side region may be regions defined by the intermediate sheet, and the thickness of the two regions may be different or the thickness of the two regions may be the same. The 1 st nonwoven fabric 36 of the present embodiment is composed of an airlaid nonwoven fabric containing pulp, and the 2 nd nonwoven fabric 37 is composed of a hot air nonwoven fabric.

The core wrap 33 covers at least a portion of the absorbent body 31. The core wrap 33 may have: zone 1, which covers one of the skin surface and the non-skin surface of the absorber 31; and a 2 nd region 332 extending outward in the width direction W from the 1 st region 331 and folded back with the outer edge of the absorber 31 as a base point to cover the other of the skin surface and the non-skin surface of the absorber 31. The 2 nd region 332 may cover only the outer side portion of the absorber 31 in the width direction W without covering the entire region of the other absorber 31 in the width direction W. The 1 st region 331 of the core wrap 33 of the present embodiment is located on the non-skin side T2 of the absorber 31, and the 2 nd region 332 is located on the skin side T1 of the absorber 31. That is, the core wrap 33 covers the entire area of the non-skin surface of the absorber 31 in the width direction W and the outer side portion of the skin surface of the absorber 31 in the width direction W, but does not cover the center of the skin surface of the absorber 31 in the width direction W. The 1 st nonwoven fabric 36 is disposed in the region of the skin surface of the absorbent body not covered by the core wrap 33, and the movement of the superabsorbent polymer 35 to the topsheet 10 side can be suppressed by the 1 st nonwoven fabric 36. In the modification, the 1 st region 331 of the core wrap 33 may be located closer to the skin side T1 than the absorber 31, and the 2 nd region 332 may be located closer to the non-skin side T2 than the absorber 31. The core wrap 33 of the present embodiment may be a "folded-back sheet" of the present invention, which is formed by folding back the outer edge of the intermediate sheet (the 2 nd nonwoven fabric 37) as a base point to cover the non-skin side T2 of the intermediate sheet and the superabsorbent polymer 35 and by covering the skin side T1 of the intermediate sheet and the superabsorbent polymer. The core wrap 33 may be made of nonwoven fabric, and preferably may be made of air-laid nonwoven fabric containing pulp.

The second sheet 39 is disposed on the skin side T1 of the absorbent body 31 and closer to the non-skin side T2 than the topsheet 10, and guides the body fluid to the absorbent body 31. The outer edge of the second sheet 39 may be positioned inward in the front-rear direction L of the outer edge of the absorber 31, may be positioned outward in the front-rear direction L of a fold line FL described later, and may be positioned inward in the front-rear direction L of the outer edge of the pressing portion 80 described later. The outer edge of the second sheet 39 may be located inward in the width direction W than the outer edge of the absorber 31, may be located inward in the width direction W than the outer edge of the center sheet 11 and the outer edge of the side sheet 12, and may be located outward in the width direction W than the pressing portion 80. The second sheet 39 may be made of a nonwoven fabric, and preferably may be made of a hot air nonwoven fabric. The absorbent article 1 may not have the second sheet 39.

The absorber 31 has a central region S11 located at the center in the width direction W in a region where the absorber 31 is trisected in the width direction W, and a pair of side regions S12 located on both sides of the central region S11 in the region. In addition, in the manner in which the length in the width direction W of the absorber 31 changes, the center region S11 and the side regions S12 may be defined with reference to the length in the width direction W at the position where the length in the width direction W of the absorber 31 is longest.

The absorbent article 1 may be provided with a pressing portion 80 that compresses at least the absorbent structure 30 in the thickness direction T. The pressing portion 80 may be formed by compressing the absorbent structure 30 and the surface sheet 10, or may be formed by compressing only the absorbent structure 30. The pressing portion 80 may be formed by compressing at least 1 absorbent member constituting the absorbent structure 30. Preferably, the pressing portion 80 is formed by compressing the topsheet 10 and the absorbent structure 30 together from the skin side T1 side toward the non-skin side T2. According to this structure, the top sheet 10 and the absorbent structure 30 are integrated, the resilience against external force is improved, and the absorbent article 1 is less likely to deform against external force.

The pressing portion 80 may have a front-rear pressing portion 81 extending linearly in the front-rear direction. The front-rear pressing portions 81 are provided in a pair at intervals in the width direction W, and 1 pair is disposed on each side of the absorbent article across the center in the width direction W. The pressing portion 80 may have dot pressing portions 82 arranged at intervals in a plan view. The dot-shaped pressing portions 82 may be arranged at intervals, and may be circular, polygonal, or a pattern such as a heart pattern. The pressing portion 80 may have a width pressing portion 83 extending linearly in the width direction W. The width pressing portion 83 may be arranged in a region sandwiched by the front and rear pressing portions 81 in the width direction W. The width pressing portions 83 may be disposed at intervals in the front-rear direction L with a crotch center S1CL as a center in the front-rear direction L of the crotch region S1 interposed therebetween, and may be provided in two at each of the front and rear sides of the crotch center S1 CL. The width pressing portion 83 may have a curved shape in which the center in the width direction bulges toward the outside in the front-rear direction L.

The outer edge of the absorbent article 1 may have a notch 90 recessed inward in the width direction W. The notch 90 may be disposed at intervals in the front-rear direction L with the crotch center S1CL interposed therebetween, and may have a1 st notch 91 on the front side and a2 nd notch 92 on the rear side. The region between the 1 st notch 91 and the 2 nd notch 92 may be recessed in a curved shape inward in the width direction W. The curvature of the region between the 1 st notch 91 and the 2 nd notch 92 may be a higher curvature than the notch 90, and may be a gentle curve than the notch 90. When the region between the 1 st notch 91 and the 2 nd notch 92 is sandwiched by the legs, contact with the legs can be eased, and external force can be transmitted within a certain range in the front-rear direction L, thereby suppressing local deformation of the absorber 31.

The absorbent article 1 can be folded so that the skin sides T1 face each other with the pair of folding lines FL extending in the width direction W as the base points before use. The fold line FL may be provided in plural at intervals in the front-rear direction L. The fold line FL of the present embodiment may have a 1 st fold line FL1 on the front side and a2 nd fold line FL2 on the rear side. The 1 st folding line FL1 may be located on the front side of the inner edge of the 1 st notch, and the 2 nd folding line may be located on the rear side of the inner edge of the 2 nd notch.

The absorbent article 1 of the present embodiment is configured to increase the rigidity of the outer side portion of the absorbent article 1, to suppress twisting of the absorbent article 1 when worn, and to maintain the absorption performance. The absorbent article 1 of the present embodiment is configured to suppress a change in the wearing sensation before and after absorption, and to suppress discomfort during wearing. Next, a structure for improving the rigidity of the outer side portion of the absorbent article 1, suppressing the twisting of the absorbent article 1 when worn, and maintaining the absorption performance, and a structure for suppressing the change in the sense of wear before and after absorption, and suppressing the sense of discomfort when worn will be described in detail.

The pressing portion 80 may span at least one of an outer end edge and an outer side edge of an absorbent member constituting the absorbent structure 30 in a plan view. The pressing portion 80 may span at least one of the outer end edge and the outer side edge of any of the absorbent members. According to this configuration, the rigidity of the absorbent article 1 can be improved by the pressing portion 80, and the absorbent article 1 can be prevented from being twisted when an external force is applied during wearing. Further, the pressing portion 80 spans at least one of the outer edge and the outer edge of the absorbent member constituting the absorbent structure 30 in a plan view, and can suppress the floating of at least one of the outer edge and the outer edge of the absorbent member. Therefore, the following can be suppressed: the absorbent article 1 is entirely twisted due to the unexpected offset or twisting of the end edges of the absorbent member. In addition, by suppressing the distortion and deformation of the absorbent member itself, the absorption performance of body fluid can be maintained.

Preferably, the extrusion 80 spans at least one of the outer end edge and the outer side edge of the core wrap 33. According to this structure, the positional displacement of the core coating body 33 can be suppressed, the skew of the core coating body 33 can be suppressed, and the unexpected deformation of the absorber 31 covered with the core coating body 33 can be suppressed. Further, by covering the skin surface and the non-skin surface of the absorber 31 with the core wrap 33 across the outer edge of the absorber 31, the rigidity of the outer portion of the absorber 31 can be improved, and the absorption performance can be further maintained. The pressing portion 80 may be formed across at least one of the outer edge and the outer edge of the core wrap 33, the outer edge of the 1 st region 331, the outer edge of the 2 nd region 332, the outer edge of the 1 st region 331, or the outer edge of the 2 nd region 332. Preferably, the squeeze portion 80 may span at least one of the outer end edge and the outer side edge of the 2 nd region 332. By pressing at least one of the outer edge and the outer edge of the 2 nd region 332 of the core wrap 33 with the pressing portion, the offset of the folded-back core wrap 33 can be suppressed, and the effect of improving the rigidity of the absorbent article 1 and the effect of securing the absorption performance can be continuously maintained. In the modification, in the case where the core wrap 33 is not folded back and is disposed on the skin side T1 and the non-skin side T2 of the absorbent body 31, the core wrap may be disposed across at least one of the outer edge and the outer edge of at least one of the skin side T1 and the non-skin side T2 of the absorbent body 31.

Preferably, the press 80 spans the end edges of the second sheet 39. The second sheet 39 is provided for guiding the body fluid to the absorbent body, and if the position is shifted or distorted, the following may be the case: the body fluid cannot be smoothly guided to the absorber 31, or the body fluid is locally guided and cannot be guided to a wide range of the absorber. However, by pressing the edge of the second sheet 39 by the pressing portion 80, the displacement and skew of the second sheet 39 can be suppressed, the body fluid can be smoothly guided to the absorber 31, and the effect of ensuring the absorption performance can be maintained continuously.

In the modification, the pressing portion 80 may extend across the end edge of the absorber 31. With this structure, deformation of the absorber 31 itself can be suppressed, and the effect of ensuring the absorption performance can be maintained continuously. The pressing portion 80 may extend over the edge of the 1 st nonwoven fabric 36 or the edge of the 2 nd nonwoven fabric 37. Further, even if the pressing portion 80 spans the end edge of the superabsorbent polymer 35, it is difficult to obtain an effect of improving the rigidity of the absorbent article 1, and therefore, it is preferable that the pressing portion 80 spans the end edge of the absorbent body 31 and spans the end edge of the sheet-like absorbent member (the 1 st nonwoven fabric 36, the 2 nd nonwoven fabric 37, etc.) in the absorbent body 31. In the modification, the absorbent body 31 may be an absorbent core in which pulp is laminated, and the pressing portion may extend across an edge of the absorbent core.

In the present embodiment, the front-rear pressing portion 81 as the pressing portion 80 spans the inner edge of the 2 nd region 332 of the core wrap 33 and spans the outer edge of the second sheet 39. The front-rear pressing portion 81 is provided at 4 positions on the front side and the rear side of the absorbent article 1 across the center in the front-rear direction L, respectively, at a position (indicated by P1 in fig. 1) of the inner edge of the 2 nd region 332 of the core wrap 33. In the above P1, two positions are provided on the front side and the rear side of the absorbent article 1 at intervals in the front-rear direction L on both sides of the center of the absorbent article 1 in the width direction. P1 is provided at 8 positions in total. The front-rear pressing portions 81 are provided at two positions respectively on the front side and the rear side of the absorbent article 1 across the center in the front-rear direction L at positions (denoted by P2 in fig. 1) of the outer edge of the second sheet 39. In the above P2, 1 is provided on each of the front side and the rear side of the absorbent article 1 on both sides of the center of the absorbent article 1 in the width direction. P2 is provided at 4 places in total. The front-rear pressing portion 81 overlaps P2 at 4 portions (two portions on the front side and two portions on the rear side) located on the outer side in the front-rear direction L among the portions of the inner edge of the 2 nd region 332 of the core wrap 33. The portion of the front-rear pressing portion 81 that overlaps the side edge of the 2 nd region 332 of the core wrap 33 along the front-rear direction L is a region extending over a certain range along the front-rear direction L. In the modification, the point-like compressed portion 82 may span an end edge of the absorbent member constituting the absorbent structure 30 in a plan view.

The front-rear pressing portions 81 may be disposed at positions outside the crotch center S1CL in the front-rear direction L, respectively, without crossing the crotch center S1CL, and may cross the end edges of the absorbent member. The crotch center S1CL is most easily gripped by the legs when worn, and is easily subjected to external force. If the front-rear pressing portion 81 extending in the front-rear direction is disposed in the crotch center S1CL, there is a risk of: the front-rear pressing portion 81 becomes a bending base point and the bending extends in the front-rear direction L, or a sense of discomfort is generated due to the contact of the front-rear pressing portion 81 with the leg or the like. However, since the front-rear pressing portions 81 are disposed at positions outside the crotch center S1CL in the front-rear direction L, respectively, without crossing the crotch center S1CL, it is possible to suppress the formation of bending base points in the crotch center S1CL and the feeling of discomfort. Further, since the front-rear pressing portion 81 extends over the edge of the absorbent member at a position outside the crotch center S1CL in the front-rear direction L, external force is less likely to be applied to a portion of the pressing portion 80 extending over the edge of the absorbent member, and the pressing portion 80 can continuously press the edge of the absorbent member.

In a mode in which the front-rear pressing portion 81 is disposed so as to avoid the crotch center S1CL, it is preferable to employ a structure for securing rigidity in the vicinity of the crotch center S1 CL. Specifically, the dot-shaped pressing portions 82 may be provided in the front-rear direction in the region sandwiched by the front-rear pressing portions 81. The front-rear pressing portions 81 are disposed so as to avoid the crotch center S1CL, whereby discomfort during wearing is suppressed, and the point-like pressing portions 82 ensure rigidity in the vicinity of the crotch center S1CL, thereby suppressing twisting of the crotch region S1. In order to suppress contact with the leg when worn, the outer edge of the dot-shaped pressing part 82 may be positioned further inward in the width direction W than the outer edge of the front-rear pressing part 81. In addition, as another configuration, the convex portion and the concave portion of the surface sheet 10 may be arranged in the region sandwiched by the front-rear pressing portions in the front-rear direction L. The front-rear pressing portion 81 is disposed so as to avoid the crotch center S1CL, whereby discomfort during wearing is suppressed, and the rigidity in the vicinity of the crotch center S1CL can be ensured by the concave portion and the convex portion, whereby twisting in the crotch region is suppressed. Further, the concave portions and the convex portions are formed in the topsheet 10, and can form deformation base points in the skin-side portion of the absorbent article 1. On the other hand, the pressing portion 80 is provided on the absorbent member, and can form a deformation base point at a portion on the non-skin side T2 than the concave portion and the convex portion. The deformation base points can be provided at the portions of the convex portion, the concave portion, and the pressing portion that are different in the thickness direction, and the deformation base points can be deformed when an external force is applied, whereby the deformation of the entire absorbent article 1 in the thickness direction T can be suppressed.

In order to further increase the rigidity of the outer side portion of the absorbent article 1, at least a part of the pressing portion 80 may be provided in the side region S12, and a portion of the pressing portion 80 that spans the end edge of the absorbent member may be provided in the side region S12. In order to suppress deformation of the absorbent article 1 with respect to an external force from the outside in the width direction W, a width pressing portion 83 may be provided at a position further inward in the width direction W than a pressing portion (in the present embodiment, the front-rear pressing portion 81) across the end edge of the absorbent member. The width pressing portion 83 of the present embodiment is provided in a region sandwiched by the front and rear pressing portions 81 across the end edges of the absorbent member in the width direction. According to this structure, the deformation of the front-rear pressing portion 81 across the end edge of the absorbent member is suppressed, and the rigidity and the absorption performance of the absorbent article are more easily maintained. Further, at least a part of the portion of the pressing portion 80 that spans the end edge of the absorbent member may be located outside the fold line FL in the front-rear direction. In general, the fixing portion is not disposed over the entire area in the front-rear direction L of the area on the outer side in the front-rear direction than the fold line, and is liable to be rolled or offset with respect to the wearing article. However, the pressing portion 80 is located in a region outside the edge of the absorbent member in the front-rear direction, and therefore, the region outside the edge of the absorbent member in the front-rear direction can be prevented from being curled or twisted.

The pressing portion 80 may be provided with a high pressing portion having a relatively high degree of pressing and a low pressing portion having a relatively low degree of pressing. The high pressed portion of the present embodiment is a portion of the front-rear pressed portion 81 that overlaps the 2 nd region 332 of the core coating body 33, and the low pressed portion is a portion of the front-rear pressed portion 81 that does not overlap the 2 nd region 332 of the core coating body 33 (a portion that is further inward in the width direction W than the 2 nd region 332). The front-rear pressing portion 81 spans the side edge of the 2 nd region 332 of the core wrap 33, and the amount of material in the region outside the side edge of the 2 nd region 332 in the width direction W is greater than the amount of material in the region inside the side edge of the 2 nd region 332 in the width direction W. Thus, a high-pressure portion and a low-pressure portion are formed. The high pressure portion may be disposed at a position on the outer side in the width direction than the low pressure portion. When the outer side of the absorbent article is subjected to force, the high pressure portion located at the outer side in the width direction W can receive an external force, and thus the deformation of the absorbent article 1 can be suppressed. In addition, by utilizing the thickening effect, the liquid can be easily introduced to the outside in the width direction W having the high pressure portion, and the body fluid discharged to the center in the width direction of the absorbent body can be guided to a wide range in the width direction. By absorbing body fluid in a large range of the absorber 31, the difference in rigidity between the portion where body fluid is absorbed and the portion where body fluid is not absorbed is less likely to be formed by local absorption of body fluid, and thus, twisting of the absorber 31 can be suppressed.

The low pressure portion may be provided on the side of the crotch center S1CL than the high pressure portion. The low pressure portion is disposed on the side of the crotch center S1CL than the high pressure portion, and thus the uncomfortable feeling caused by the high pressure portion when worn can be suppressed. The fixing portion 60 may be disposed at a position outside the low pressure portion in the width direction W. The degree of compression of the low compression portion is relatively low, and it is difficult to obtain the effect of maintaining rigidity as compared with the high compression portion. However, since the fixing portion 60 is provided on the outer side in the width direction W than the low pressure portion, the low pressure portion is less likely to deform and the function of the low pressure portion is easily maintained, since the fixing portion 60 can be fixed to the wearing article.

The fixing portion 60 may overlap a portion of the pressing portion across the end edge of the absorbent member. The pressing portion 80 can be fixed to the wearing article by the fixing portion 60 at a position crossing the end edge of the absorbent member. Since the portion of the pressing portion 80 that presses the end edge of the absorbent member is fixed to the wearing article via the fixing portion 60, the portion of the pressing portion 80 that presses the end edge of the absorbent member is less likely to deform, and the pressing portion 80 can continuously press the end edge of the absorbent member.

The absorber 31 may be composed of a super absorbent polymer 35 and nonwoven fabrics 36 and 37 for holding the super absorbent polymer 35. According to this structure, the absorbent body 31 composed of the nonwoven fabrics 36, 37 and the superabsorbent polymer 35 is less likely to be twisted or wrinkled than the absorbent body in which pulp is laminated. In addition, the superabsorbent polymer 35 swells after absorbing body fluid, and thus the elasticity of the absorbent body 31 is improved, and the shape of the absorbent body 31 is easily recovered when an external force is applied. Therefore, the absorber 31 can be prevented from twisting, and the rigidity and the absorption performance of the absorbent article 1 can be maintained. The nonwoven fabrics 36, 37 may have heat-fusible fibers, and the pressing portion 80 may be provided on the absorber 31. In the method of providing a plurality of nonwoven fabrics, the nonwoven fabric having the extruded portion formed thereon may have heat-fusible fibers. According to the present structure, the heat-welded fibers of the nonwoven fabric constituting the absorber 31 are welded by the formation of the pressed portion, and the rigidity of the absorber 31 is improved. The absorbent body 31 can be prevented from twisting, and the rigidity and the absorption performance of the absorbent article 1 can be maintained.

The absorbent article 1 is configured to suppress a change in the sense of wear before and after absorbing body fluid, specifically, to have a predetermined width recovery rate. The width recovery rate is a ratio of a length in the width direction W of the absorbent article 1 after the force is applied and removed to a length in the width direction of the absorbent article before the force is applied, for example, when the force is applied to the absorbent article 1 from both outer sides in the width direction W of the absorbent article 1, and can be measured by the following method. Fig. 4 is a diagram for explaining a method of measuring the width recovery rate.

In order to measure the width recovery rate, first, as shown in fig. 4 (a) and 4 (B), a test body to be measured is prepared. Fig. 4 (a) is a view seen from the upper surface side, and fig. 4 (B) is a view seen from the left side in fig. 4 (a). In the case of an absorbent article stored in a package, the absorbent article is taken out from the package, and in the case of an absorbent article having a fixing portion, powder such as medicinal baby powder is attached to the fixing portion to remove the adhesiveness of the fixing portion. Next, the test body is elongated in the front-rear direction L, and one end of the belt member 201 is fixed to the front end portion and the rear end portion of the absorbent article 1. The belt member 201 is fixed so as to be laterally symmetrical with respect to the widthwise center of the absorbent article 1 across the widthwise center of the absorbent article 1. The length of the belt member 201 in the front-rear direction L of the region where the belt member 201 is fixed to the absorbent article 1 is 15mm, and the width of the belt member 201 is 15mm. After the fixing of the belt member 201, it was left for 60 seconds. Thus, a test body for measuring the width recovery rate in the dry state can be obtained. Further, in the wet test piece, after the tape member 201 was fixed in the step of obtaining the dry test piece, 30ml of body fluid was dropped and left for 60 seconds. Thus, a test body for measuring the width recovery rate in the wet state can be obtained. In addition, the body fluid can be appropriately changed according to the use of the absorbent article 1, and for example, in the case of an absorbent article that mainly absorbs urine, distilled water can be used as the simulated urine.

Next, the other end of the belt member 201 is fixed to the stage 205. Thereby, the absorbent article 1 is fixed to the table 205 via the belt member 201. The stage 205 is provided as a flat plate. Next, an adjustment member 204 for adjusting the pressing position of the pressing jig 203 described later is provided. First, a stage 202 for placing an adjustment member 204 is provided. The placement table 202 has a flat surface, and is disposed at a position not overlapping the absorbent article 1 and at positions on both outer sides in the front-rear direction L of the absorbent article 1. Next, the adjustment member 204 is carried on the stage 202 so as to straddle the front stage 202 and the rear stage 202. In this state, the adjustment member 204 and the absorbent article 1 are disposed at intervals in the vertical direction. When the absorbent article 1 is pressed by the pressing jig 203, the adjustment member 204 is in a floating state. Specifically, for example, the width of the mounting table 202 may be 60mm, and the height of the mounting table may be 30mm.

Next, the width recovery rate of each test piece was measured. First, the length in the width direction W of the absorbent article 1 before the application of force is measured. The measurement is performed in a state where the absorbent article 1 is fixed to the table 205. In the manner in which the length in the width direction W of the absorbent article 1 is changed, the measurement is performed at the position of the center in the front-rear direction L of the absorbent article 1. Next, as shown in fig. 4 (C), a force is applied from both sides of the absorbent article 1 using the pressing jigs 203. The pressing jig 203 may be a cylindrical shape having a rigidity higher than that of the absorbent article 1. The cylindrical body is disposed so that the axial direction of the cylindrical body is along the thickness direction of the absorbent article 1 and the circular arc portion of the outer surface of the cylindrical body is in contact with the outer edge of the absorbent article 1 in the width direction W (i.e., so that the circular shape of the cylindrical body can be observed when the absorbent article 1 is viewed in plan). Preferably, the diameter of the cylinder is shorter than the length in the front-rear direction L of the absorbent article 1, for example, a cylinder with a diameter of 120mm may be used. The pressing jigs 203 are disposed at intervals so that the distance in the width direction W becomes 30cm across the absorbent article 1. The positions of the left and right cylinders in the front-rear direction L are arranged at the same positions, and the apex 203T of the circular arc portion of the outer surface of the cylinder (the point closest to the absorbent article) is arranged so as to be in contact with the center of the absorbent article 1 in the front-rear direction. The pressing jigs 203 are moved inward in the width direction W so that the apexes 203T of the pressing jigs on the absorbent article side are simultaneously in contact with the outer edges of the both sides of the absorbent article. The width of the adjustment member 204 was 15mm, and after the pressing jig 203 was moved to a position where it contacted the adjustment member 204, the pressing jig 203 was returned to its original position, and one reciprocation was performed. The moving speed was set to one reciprocation for 0.5s. This was reciprocally performed 10 times. That is, the pressing jig 203 is reciprocated 10 times within 5 seconds. After 10 reciprocations, the force pressing the jig 203 was removed, and therefore the length in the width direction of the absorbent article 1 after the removal of the force was measured. The measurement position is set to the same position as the measurement position before the force is applied. The width recovery ratio can be calculated by (length in the width direction of the absorbent article after removal of the force)/length in the width direction of the absorbent article before application of the force.

In this embodiment, the width recovery rate of the absorbent articles of examples 1 and 2 and the absorbent articles of comparative examples 1 to 4 was measured, and the measurement results are shown in table 1.

[ Table 1]

The difference between the width recovery rate in the dry state and the width recovery rate in the wet state may be 10% or less. Immediately after wearing the absorbent article 1, no external force is applied to the absorbent article 1, and if the absorbent article 1 is continuously worn, the external force is repeatedly applied to the absorbent article 1 by the legs or the like. The width recovery rate is a value indicating a change in the length in the width direction between a state immediately after wearing and a state after continuous wearing, and the larger the value, the more the absorbent article 1 returns to a state close to the absorbent article before external force is applied, and the less the change in the feeling of wearing due to external force is applied. The applicant conducted intensive studies and as a result, found that: if the wearing sensation of the absorbent article 1 changes, some users may experience discomfort due to the change in wearing sensation. In the absorbent article of the present invention, the difference between the width recovery rate before absorbing body fluid and the width recovery rate after absorbing body fluid is small and 10% or less, so that the change in the feeling of wearing before and after absorption is small, and the uncomfortable feeling caused by the change in the feeling of wearing can be suppressed. Further, 6 absorbent articles including the absorbent article of example 1 and the absorbent article of example 2 and the absorbent articles of comparative examples 1 to 4 were worn, and the wearing sensation immediately after wearing and absorbing body fluid were evaluated. Based on the evaluation results, the absorbent articles of example 1 and the absorbent article of example 2 were evaluated as having less variation in wear feeling than the absorbent articles of comparative examples 1 to 4. In particular, in the absorbent article of example 1, a good evaluation was obtained. From the evaluation results, the difference between the width recovery rate in the dry state and the width recovery rate in the wet state may be 10% or less, preferably 6% or less, and more preferably 4% or less.

The width recovery rate in the dry state may be higher than the width recovery rate in the wet state. According to this configuration, since the width recovery rate in the dry state (state before absorbing the body fluid) is high, the length of the absorber 31 in the width direction W can be suppressed from being shortened before the body fluid is discharged, and the body fluid can be absorbed by the absorber 31 arranged widely. Therefore, the absorption performance of the absorbent article 1 can be maintained. Further, by absorbing the body fluid in a wide range of the absorber, it is possible to suppress a decrease in the rigidity of the absorber caused by the absorption of the body fluid locally, and to suppress a change in the wearing sensation when absorbing the body fluid.

The width recovery rate in the wet state may be 80% or more. According to this configuration, even when the absorbent article is used for a long period of time after absorbing body fluid, the length in the width direction W of the absorbent article 1 can be continuously ensured, discomfort during wearing can be suppressed, the length in the width direction W of the absorber 31 can be ensured, and the absorption performance can be maintained. In the above evaluation, the absorbent articles of example 1 and example 2 were evaluated such that the length in the width direction of the absorbent article was not shortened even when used for a long period of time, compared with the absorbent articles of comparative examples 1 to 4, and the uncomfortable feeling at the time of wearing was suppressed. In particular, in the absorbent article of example 1, a good evaluation was obtained. From the evaluation results, the wet state width recovery rate may be 80% or more, preferably 89% or more, and more preferably 93% or more.

The width recovery rate in the dry state may be 95% or more. According to the present structure, the length in the width direction W of the absorbent article 1 is recovered with little change by the application of external force before absorbing body fluid. Therefore, the length in the width direction W of the absorber 31 can be ensured while suppressing discomfort during wearing, and the absorption performance can be maintained. In the above evaluation, the absorbent articles of example 1 and example 2 were evaluated such that the length in the width direction W of the absorbent article 1 was not shortened as compared with the absorbent articles of comparative examples 1 to 4, and the uncomfortable feeling during wearing was suppressed. In particular, in the absorbent article 1 of example 1, a good evaluation was obtained. From the evaluation results, the width recovery rate in the dry state may be 95% or more, and preferably 97% or more.

The absorber 31 may be composed of a super absorbent polymer 35 and a nonwoven fabric holding the super absorbent polymer 35. An absorbent body comprising a nonwoven fabric and a superabsorbent polymer is less likely to be twisted and wrinkled than an absorbent body comprising pulp. In addition, after absorbing body fluid, the superabsorbent polymer 35 swells, and thus the elasticity is improved, and the shape of the absorber 31 is easily recovered when an external force is applied. Therefore, the absorber 31 can be prevented from twisting, and the rigidity and the absorption performance of the absorbent article 1 can be maintained. The nonwoven fabric constituting the absorber 31 may have an airlaid nonwoven fabric containing pulp. In the case where the absorber 31 has a plurality of nonwoven fabrics, at least 1 nonwoven fabric may be an airlaid nonwoven fabric containing pulp. According to the pulp-containing air-laid nonwoven fabric formed into the nonwoven fabric, the structure of the nonwoven fabric is less likely to change before and after absorbing body fluid than an absorbent core in which only fluff pulp is laminated, and the change in the feeling of wearing before and after absorption can be further suppressed. In addition, the water absorption of body fluid can be improved by the pulp constituting the nonwoven fabric. The absorbent body 31 of the present embodiment is composed of a superabsorbent polymer 35, a 1 st nonwoven fabric 36 and a2 nd nonwoven fabric 37, and the 1 st nonwoven fabric 36 is composed of an airlaid nonwoven fabric containing pulp.

The intermediate sheet (2 nd nonwoven fabric) of the absorber 31 may have non-water-absorbent fibers. The intermediate sheet is disposed in the middle portion in the thickness direction T of the absorber 31, and the superabsorbent polymer 35 is disposed on both sides in the thickness direction. The non-water-absorbent fibers are less likely to swell by absorbing water after the body fluid is absorbed by the absorber 31, and are less likely to soften. Therefore, the nonwoven fabric containing the non-water-absorbent fibers is not easily deformed even after absorbing body fluid. Therefore, the wearing feeling changes little before and after absorbing body fluid, and the uncomfortable feeling caused by the wearing feeling changes can be suppressed. The non-water-absorbent fibers are fibers other than absorbent fibers (pulp, cotton, cellulose, etc.), and thermoplastic fibers can be exemplified. The intermediate sheet (nonwoven fabric 2) may have a non-water-absorbent fiber or may have an absorbent fiber. In the case where the intermediate sheet has non-absorbent fibers and water-absorbent fibers, the weight ratio of the non-absorbent fibers to the entire fibers may be 50% or more, and preferably 80% or more. In addition, it is more preferable that the intermediate sheet does not have water-absorbent fibers.

The folded-back sheet (core wrap 33) may be composed of an airlaid nonwoven fabric containing pulp and non-water-absorbent fibers. The superabsorbent polymer can be held by the intermediate sheet, and the intermediate sheet and the superabsorbent polymer can be wound in and held by the folded-back sheet, so that deformation of the absorbent body can be suppressed. Therefore, the length in the width direction of the absorbent article can be ensured more easily, the uncomfortable feeling at the time of wearing can be suppressed, the length in the width direction of the absorber can be ensured, and the absorption performance can be maintained. In addition, the folded back sheet is also an airlaid nonwoven fabric having pulp, and thus is not easily deformed even after absorbing body fluid. Therefore, the wearing feeling changes little before and after absorption, and the uncomfortable feeling caused by the change in wearing feeling can be suppressed. In addition, in the mode in which the folded-back sheet contains the binder and the fibers are bonded by the binder, the pulp fibers and/or the pulp fibers and the non-water-absorbent fibers can be bonded to each other, and the width recovery rate of the absorbent body can be easily kept high before (during drying) and after (during wetting) the absorption as compared with the absorbent body composed of the crushed pulp and the super-absorbent polymer.

The absorbent article 1 may be configured to have a high recovery rate not only in the width direction W but also in the front-back direction L (front-back recovery rate). The front-rear recovery rate is a ratio of a length of the absorbent article in the front-rear direction after the force is applied and removed to a length of the absorbent article in the front-rear direction before the force is applied, with respect to the force applied to the absorbent article from both sides in the front-rear direction of the absorbent article. The difference between the front-back recovery rate of the absorbent article in the dry state before absorbing body fluid and the front-back recovery rate of the absorbent article in the wet state after absorbing 30ml of body fluid may be 10% or less, the front-back recovery rate of the absorbent article in the wet state may be 80% or more, and the front-back recovery rate of the absorbent article in the dry state may be 95% or more. At least one of the top sheet 10, the second sheet 39, the core wrap (folded back sheet) 33 and the 2 nd nonwoven fabric (intermediate sheet) 37 contains thermoplastic fibers, whereby the elastic resilience of the absorbent article becomes high and the front-back recovery becomes high. After the removal of the force, the length of the absorbent article in the front-rear direction is recovered, and as a result, the density of the absorbent body can be suppressed from becoming high, and the absorption performance can be maintained.

The absorbent article 1 may be configured so that the recovery rate (thickness recovery rate) in the thickness direction T is also high. The thickness recovery rate is a ratio of the thickness of the absorbent article after the force is applied and removed to the thickness of the absorbent article before the force is applied, with respect to the force applied to the absorbent article from both sides in the thickness direction of the absorbent article. The difference between the recovery rate of the thickness of the absorbent article in the dry state before absorbing body fluid and the recovery rate of the thickness of the absorbent article in the wet state after absorbing 30ml of body fluid may be 30% or less, the recovery rate of the thickness of the absorbent article in the wet state may be 50% or more, and the recovery rate of the thickness of the absorbent article in the dry state may be 85% or more. At least one of the top sheet 10, the second sheet 39, the core wrap (folded back sheet) 33 and the 2 nd nonwoven fabric (intermediate sheet) 37 contains thermoplastic fibers, whereby the elastic resilience of the absorbent article becomes high and the thickness recovery becomes high. Even when the absorbent article 1 is temporarily crushed by body pressure, the thickness of the absorbent article is recovered when the body pressure is removed, for example, when the wearer stands up, and as a result, the density of the absorbent body can be suppressed from increasing, and the absorption performance can be maintained.

The absorbent article 1 may be a small-sized absorbent article. The small-sized absorbent article 1 can be exemplified by a thin absorbent article and a wingless absorbent article. In the thin absorbent article, the thickness in the natural state may be 8.0mm or less, preferably 5.0mm or less, and more preferably 3.0mm or less. The wingless absorbent article 1 is an absorbent article having no wings which are folded back toward the non-skin side of the wearing article when worn. The thin absorbent article has a small thickness and it is difficult to ensure rigidity. In addition, compared to the winged absorbent article, the wingless absorbent article has no portion folded back with respect to the wearing article, and therefore it is difficult to secure rigidity. In the absorbent article, by providing the pressing portion across the end edge of the absorbent member, it is possible to suppress the distortion of the absorbent article as a whole and to maintain the absorption performance of body fluid. In addition, in the absorbent article, by suppressing the change in the wearing sensation before and after absorption, the uncomfortable feeling can be suppressed.

The present invention has been described in detail using the above embodiments, but it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as a modification and variation without departing from the spirit and scope of the present invention as defined by the description of the claims. Accordingly, the description of the present specification is for the purpose of illustration and is not intended to be limiting in any way.

Claims (9)

1. An absorbent article, comprising: an absorber; a surface sheet which is disposed closer to the skin than the absorber and is in contact with the wearer; and a back sheet disposed on the non-skin side of the absorber,

If the ratio of the length in the width direction of the absorbent article after the force is applied and removed to the length in the width direction of the absorbent article before the force is applied is set to the width recovery rate for the force applied to the absorbent article from both outer sides in the width direction of the absorbent article

The difference between the width recovery rate of the absorbent article in a dry state before absorbing body fluid and the width recovery rate of the absorbent article in a wet state after absorbing 30ml of body fluid is 10% or less.

2. The absorbent article of claim 1, wherein,

The width recovery rate in the dry state is higher than the width recovery rate in the wet state.

3. The absorbent article of claim 2, wherein,

The wet state has a width recovery rate of 80% or more.

4. The absorbent article as set forth in claim 2 or 3, wherein,

The width recovery rate in the dry state is 95% or more.

5. The absorbent article according to claim 1 or 2, wherein,

The absorbent article is a thin absorbent article having a thickness of 8mm or less, or a wingless absorbent article having no wings which are fixed to the non-skin side of the wearing article when worn.

6. The absorbent article according to claim 1 or 2, wherein,

The absorber is composed of a super absorbent polymer and a nonwoven fabric holding the super absorbent polymer.

7. The absorbent article of claim 6, wherein,

The nonwoven has an airlaid nonwoven with pulp.

8. The absorbent article of claim 6, wherein,

The nonwoven fabric has an intermediate sheet disposed between a skin-side region including a skin surface of the absorber and a non-skin-side region including a non-skin surface of the absorber in a thickness direction, and the intermediate sheet has non-water-absorbent fibers.

9. The absorbent article of claim 8, wherein,

The absorbent article has a folded-back sheet which covers the non-skin side of the intermediate sheet and the superabsorbent polymer, and is folded back around the outer edge of the intermediate sheet as a base point to cover the skin side of the intermediate sheet and the superabsorbent polymer,

The folded back sheet is composed of an airlaid nonwoven fabric containing pulp and non-absorbent fibers.