Absorbent article

Abstract

The invention provides an absorbent article which can improve wearing feeling by reducing discomfort of the absorbent article and impart an impression of a thin absorbent article according to the touch feeling of the absorbent article so as to improve wearing feeling. An absorbent article (1) is provided with: an absorbent body (40) disposed at least in a crotch region; and side sheets (90) disposed at least on both sides in the width direction of the absorbent body. The side sheet has a first side sheet (91) and a second side sheet (92) that extend in the width direction from the outer edge of the absorbent body in the width direction. The second side sheet has an extension region (R92) that constitutes the skin-side surface of the absorbent article at a position further outward in the width direction than the outer edge of the first side sheet in the width direction. The average friction coefficient (MIU) of the skin-side surface of the second side sheet is lower than the average friction coefficient (MIU) of the outer surface of the first side sheet.

Description

Technical Field

[0001] The present invention relates to an absorbent article having side sheets disposed on both sides of an absorbent body. Background Art

[0002] In Patent Document 1 and Patent Document 2, there is disclosed an absorbent article having side sheets disposed on both sides of an absorbent body. The side sheet has a first side sheet and a second side sheet disposed at a position on the non-skin side with respect to the first side sheet. The first side sheet has: a skin-side folded-back portion that is folded back toward the skin side from a side crease located at a position outside the outer edge in the width direction of the absorbent body in the width direction; and a non-skin-side folded-back portion that is folded back toward the non-skin side from the side crease of the absorbent body. The non-skin-side folded-back portion is joined to the skin-side surface of the second side sheet by a side joining portion located at a position inside the side crease in the width direction.

[0003] Prior art documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2020 / 095953

[0006] Patent Document 2: Japanese Unexamined Patent Application Publication No. 2021-186273 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] According to the above absorbent article, when the absorbent article is pressed inward in the width direction by the wearer's leg, the wearer's leg tends to abut against the vicinity of the side crease of the first side sheet. At this time, the first side sheet located at a position outside the side joining portion in the width direction is not joined to the second side sheet and is easily deformed by the pressing. By the deformation of the first side sheet, the discomfort when the leg abuts against the outer portion of the absorbent article can be reduced. In addition, when the absorbent article is pressed inward in the width direction by the wearer's leg, the wearer's leg inserts into the region between the first side sheet and the second side sheet at a position outside the side joining portion in the width direction and sometimes rubs against the skin-side surface of the second side sheet. Since the leg rubs against the second side sheet, there may be discomfort when the leg abuts against the outer portion of the absorbent article.

[0009] In addition, in recent years, some wearers sometimes seek to further improve the wearing feeling and prefer thin absorbent articles. After in-depth research by the applicant, it has been found that when the actual thickness of the absorbent article is thin, not only is the wearing feeling improved, but also an impression of thinness is obtained by the touch during wearing such as the touch of the absorbent article, thereby improving the wearing feeling.

[0010] The present invention has been completed in view of such problems, and an object thereof is to provide an absorbent article that can improve the wearing feeling by reducing the discomfort of the absorbent article and can give an impression that the absorbent article is thin according to the touch of the absorbent article, thereby improving the wearing feeling.

[0011] Means for solving the problems

[0012] An absorbent article according to one aspect includes: a front-back direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side flaps disposed at least on both sides in the width direction of the absorbent body. The side flaps have a first side flap and a second side flap that extend in the width direction along the outer edge in the width direction of the absorbent body. The second side flap has an extending region that forms the surface on the skin side of the absorbent article at a position outside in the width direction with respect to the outer edge in the width direction of the first side flap. The average coefficient of friction (MIU) of the surface on the skin side of the second side flap is lower than the average coefficient of friction (MIU) of the outer surface of the first side flap.

[0013] An absorbent article according to another aspect includes: a front-back direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side flaps disposed at least on both sides in the width direction of the absorbent body. The side flaps have a first side flap and a second side flap that extend in the width direction from the outer edge in the width direction of the absorbent body. The first side flap has a skin-side folding-back portion that folds back toward the skin side from a side fold line located outside in the width direction with respect to the outer edge of the absorbent body and a non-skin-side folding-back portion that folds back toward the non-skin side from the side fold line. The second side flap has a covering region that covers the non-skin-side surface of the non-skin-side folding-back portion. A non-joined region where the non-skin-side folding-back portion and the covering region are not joined extends from the side fold line toward the inside in the width direction. The average coefficient of friction (MIU) of the surface on the skin side of the second side flap is lower than the average coefficient of friction (MIU) of the outer surface of the first side flap.

[0014] Another absorbent article of a technical solution includes: a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front side region located at a position anterior to the crotch region, and a rear side region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side flaps disposed at least on both sides in the width direction of the absorbent body. The side flaps have a skin-side region that forms the skin-side surface of the absorbent article at a position extending in the width direction from the outer edge in the width direction of the absorbent body. An impermeable film layer is provided in the skin-side region. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a plan view of the absorbent article of the embodiment as viewed from the skin side.

[0016] Figure 2 FIG. is a plan view of the absorbent article of the embodiment as viewed from the non-skin side.

[0017] Figure 3 FIG. is a cross-sectional view taken along line A-A shown in Figure 1 FIG.

[0018] Figure 4 FIG. is a cross-sectional view taken along line B-B shown in Figure 1 FIG.

[0019] Figure 5 FIG. is Figure 3 a schematic enlarged view of part C shown in FIG.

[0020] Figure 6 FIG. is a plan view of the absorbent body.

[0021] Figure 7 FIG. is a plan view of the absorbent sheet.

[0022] Figure 8 FIG. is a cross-sectional view of the absorbent article schematically showing the worn state.

[0023] Figure 9 FIG. is Figure 3 a schematic enlarged view of part D shown in FIG.

[0024] Figure 10 FIG. is a view showing the arrangement pattern of the side flaps.

[0025] REFERENCE MARK DESCRIPTION

[0026] 1. Absorbent article; 5. Wing; 11. Skin-side sheet (topsheet); 20. Non-skin-side sheet (side sheet); 21. First non-skin-side sheet (first side sheet); 211. First region; 212. Second region; 22. Second non-skin-side sheet (second side sheet); 23. Third non-skin-side sheet (backsheet); 25. Auxiliary sheet; 30. Non-skin-side joint; 31. Crotch joint; 32. Front-back joint; 35. Skin-side joint; 40. Absorbent body; 41. Absorbent core; 44. Superabsorbent polymer; 45. Absorbent sheet (auxiliary absorbent layer); 46. Sheet pressing part; 461. First sheet pressing part; 462. Second sheet pressing part; 471. First compression part; 472. Second compression part; 48. Sheet; 60. Fixing part; 61. Main body fixing part; 611. First main body fixing part; 612. Second main body fixing part; 81. Main body pressing part; 811. Outer pressing part; 812. Inner pressing part; 82. Pressing constitution part; 90. Side sheet; 91. First side sheet; 92. Second side sheet; 321. First front-back joint; 322. Second front-back joint; 451. First absorbent sheet; 452. Second absorbent sheet; 471. First compression part; 472. Second compression part; L. Front-back direction; NR. Non-overlapping region; R45. Side region; R41. Laminated region; R42. Auxiliary region; R91. Wrapping region; R92. Protruding region; RC. Central region; RS. Outer region; S. Wearing article; S1. Front side region; S2. Rear side region; S3. Crotch region; T. Thickness direction; T1. Skin side; T2. Non-skin side; W. Width direction. Detailed Description of the Invention

[0027] (1) Summary of the Embodiment

[0028] According to the description in this specification and the drawings, at least the following matters are clarified.

[0029] The absorbent article of Mode 1 includes: a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side flaps disposed at least on both sides in the width direction of the absorbent body. The side flaps have a first side flap and a second side flap that extend along the width direction with respect to the outer edges in the width direction of the absorbent body. The second side flap has an extended region that forms the surface on the skin side of the absorbent article at a position outside the outer edge in the width direction of the first side flap. The average coefficient of friction (MIU) of the surface on the skin side of the extended region is lower than the average coefficient of friction (MIU) of the outer surface of the first side flap. According to this mode, when the wearer's leg presses the absorbent article inward in the width direction, the wearer's leg rubs against the surface on the skin side of the extended region outside the first side flap in the width direction. At this time, since the average coefficient of friction (MIU) of the surface on the skin side of the second side flap is low, the second side flap smoothly adheres to the leg, and the discomfort when adhering to the leg can be reduced. In addition, according to the smooth adhesion feeling of the second side flap, the wearer can more easily feel the ease of slipping compared to the cushioning property of the absorbent article, and it is easy to obtain the impression of a thin-type absorbent article that deforms along the surface rather than a thick absorbent article with cushioning property. Therefore, according to the touch feeling during wearing, the wearer can easily obtain the impression of whether it is a thin type, and the wearing feeling can be improved.

[0030] According to a preferred mode, based on the technical solution of Mode 1, the technical solution of Mode 2 may have the following features. The absorbent article is provided with wing flaps that are disposed in the crotch region and are folded back to the non-skin side of the worn article during wearing. The second side flap is disposed on the skin side surface of the wing flap. In the state where the wing flap is worn folded back to the non-skin side of the worn article during wearing, the second side flap is disposed so as to cover the skin side of the worn article from the region folded back to the non-skin side of the worn article. When the leg adheres to the outer portion of the worn article, the second side flap disposed so as to be involved in the worn article is not easily displaced, and the leg slides on the second side flap. At this time, since the average coefficient of friction (MIU) of the surface on the skin side of the second side flap is low, the second side flap smoothly adheres to the skin, the discomfort when adhering to the leg can be reduced, and the impression of a thin-type absorbent article can be given to improve the wearing feeling.

[0031] According to a preferred embodiment, based on the technical solutions of Embodiment 1 or Embodiment 2, the technical solution of Embodiment 3 may have the following characteristics. The hydrophobicity of the skin side surface of the second side panel is higher than the hydrophobicity of the outer surface of the first side panel. According to this embodiment, since the hydrophobicity of the second side panel is higher than that of the first side panel, even if body fluid diffuses beyond the first side panel and reaches the second side panel, the situation of body fluid reaching the wearing article can be suppressed. The deterioration of the wearing feeling caused by the attachment of body fluid to the wearing article can be suppressed.

[0032] According to a preferred embodiment, based on the technical solution of any one of Embodiments 1 to 3, the technical solution of Embodiment 4 may have the following characteristics. The hydrophobicity of the skin side surface of the second side panel is the same as or higher than the hydrophobicity of the non-skin side surface of the absorbent article. According to this embodiment, even if body fluid reaches the second side panel, since the hydrophobicity of the second side panel is relatively high, the situation of body fluid reaching the wearing article can be suppressed, and the deterioration of the wearing feeling caused by the attachment of body fluid to the wearing article can be suppressed.

[0033] According to a preferred embodiment, based on the technical solution of any one of Embodiments 1 to 4, the technical solution of Embodiment 5 may have the following characteristics. The average deviation (SMD) of the surface roughness of the skin side surface of the second side panel is lower than the average deviation (SMD) of the surface roughness of the outer surface of the first side panel. According to this embodiment, since the average deviation (SMD) of the surface roughness of the first side panel is relatively high, when it abuts against the leg, the first side panel does not abut with a smooth surface but is prone to abut with points formed by irregularities, reducing the contact area, and further discomfort can be suppressed. On the other hand, since the average deviation (SMD) of the surface roughness of the second side panel is relatively low, when the wearer's leg slides on the skin side surface of the second side panel, the second side panel abuts smoothly against the skin. Therefore, the discomfort when abutting against the leg can be reduced, and an impression of a thin absorbent article can be given to improve the wearing feeling.

[0034] According to a preferred embodiment, based on the technical solution of any one of Embodiments 1 to 5, the technical solution of Embodiment 6 may have the following characteristics. The first side panel and the second side panel are made of a non-woven fabric having fibers. The amount of fiber fuzz on the second side panel is less than the amount of fiber fuzz on the first side panel. According to this embodiment, since the amount of fiber fuzz on the second side panel is less, uncomfortable stimuli such as tingling caused by fiber fuzz are less likely to be perceived by the wearer, and the second side panel is prone to abut smoothly against the leg. Therefore, the discomfort when abutting against the leg can be reduced, and an impression of a thin absorbent article can be given to improve the wearing feeling.

[0035] According to a preferred embodiment, based on the technical solutions of any one of Embodiments 1 to 6, the technical solution of Embodiment 7 may have the following features. The absorbent article has a backsheet, which is disposed on the non-skin side of the absorber and forms the non-skin side surface of the absorbent article. The first side flap has a skin-side folded-back portion that is folded back toward the skin side from a side crease located on the outer side in the width direction of the outer edge of the absorber, and a non-skin-side folded-back portion that is folded back toward the non-skin side from the side crease. In a region on the outer side in the width direction of the side crease, the backsheet and the second side flap are laminated. Between the side crease and the outer edge of the absorber, the skin-side folded-back portion and the non-skin-side folded-back portion are laminated. The light transmittance of the region where the backsheet and the second side flap are laminated is higher than the light transmittance of the region where the skin-side folded-back portion and the non-skin-side folded-back portion are laminated. According to this embodiment, the light transmittance of the region where the backsheet and the second side flap are laminated is relatively high and it is easy to transmit light. The wearer can easily obtain the impression that the region where the backsheet and the second side flap are laminated is thinner, is easily deformed softly, and is gentle on the skin. On the other hand, the light transmittance of the region where the skin-side folded-back portion and the non-skin-side folded-back portion are laminated is relatively low and it is not easy to transmit light. The wearer can easily obtain the impression that the region where the skin-side folded-back portion and the non-skin-side folded-back portion are laminated has a thickness and body fluids are not easily leaked, and can easily obtain a sense of security against leakage. Based on the difference in appearance between the two regions, a sense of security regarding the absorption performance of body fluids can be given, and an impression of a thin type that is easily deformed and has a relatively thin thickness can be given.

[0036] According to a preferred embodiment, based on the technical solutions of any one of Embodiments 1 to 7, the technical solution of Embodiment 8 may have the following features. The absorbent article has a topsheet, which covers the skin side of the absorber at the center in the width direction of the absorber and is in contact with the wearer. The first side flap has a skin-side folded-back portion that is folded back toward the skin side from a side crease located on the outer side in the width direction of the outer edge of the absorber, and a non-skin-side folded-back portion that is folded back toward the non-skin side from the side crease. The skin-side folded-back portion of the first side flap is joined to the skin-side surface of the topsheet. According to this embodiment, by covering the skin-side surface of the topsheet with the first side flap that covers the side of the absorber, even when body fluids flow along the surface of the topsheet, side leakage can be suppressed by the first side flap.

[0037] According to a preferred embodiment, based on the technical solution of Embodiment 8, the technical solution of Embodiment 9 may have the following features. The absorbent article has a backsheet, which is disposed on the non-skin side of the absorbent body and forms the non-skin side surface of the absorbent article. In a region outside the side crease in the width direction, the backsheet and the second side sheet are laminated. Between the side crease and the outer edge of the absorbent body, the skin-side folded-back portion, the non-skin-side folded-back portion, and the topsheet are laminated. The total thickness of the backsheet and the second side sheet is thinner than the total thickness of the non-skin-side folded-back portion, the skin-side folded-back portion, and the topsheet of the first side sheet. According to this embodiment, since the combined thickness of the backsheet and the second side sheet is thin, when the leg slides on the surface of the second side sheet, it is easy to feel this thinness. Especially when the second side sheet forms a wing and is wound around the wearing article, the leg is easy to adhere to the second side sheet, and it is even easier to transmit its thinness. On the other hand, since the combined thickness of the skin-side folded-back portion, the non-skin-side folded-back portion, and the topsheet is thick, when the leg adheres to the first side sheet from the side-crease side, the cushioning provided by the thickness of the first side sheet increases, and the discomfort when adhering to the side crease can be reduced.

[0038] According to a preferred embodiment, based on the technical solution of any one of Embodiments 1 to 9, the technical solution of Embodiment 10 may have the following features. The absorbent body has an absorbent sheet, which covers the skin side and the non-skin side of the superabsorbent polymer in the thickness direction by the sheet. The first side sheet has a skin-side folded-back portion that folds back from a side crease located outside the outer edge of the absorbent body in the width direction to the skin side and a non-skin-side folded-back portion that folds back from the side crease to the non-skin side. The second side sheet has a covering area that covers the non-skin side surface of the non-skin-side folded-back portion. The non-skin-side folded-back portion is joined to the covering area by a side joining portion. In the width direction, the outer edge of the side joining portion is located inside the outer edge of the absorbent sheet. According to this embodiment, by providing the absorbent body with an absorbent sheet having a superabsorbent polymer, the absorbent body can be thinned while ensuring the absorption capacity. In addition, since the outer edge of the side joining portion is located inside the outer edge of the absorbent sheet, the outer edge of the absorbent sheet does not overlap with the region where the first side sheet and the second side sheet are joined by the side joining portion, but overlaps with the region where the second side sheet is not fixed to the first side sheet. Therefore, the outer edge of the absorbent sheet is easy to deform, and the discomfort when adhering to the leg can be reduced.

[0039] According to a preferred embodiment, based on the technical solution of any one of Embodiments 1 to 10, the technical solution of Embodiment 11 may have the following features. A liquid-impermeable film layer is provided on the skin side surface of the second side panel. According to this embodiment, when the wearer's leg or crotch abuts against the second side panel or rubs against the second side panel, the film layer smoothly abuts against the leg or the like. Therefore, while preventing body fluids from leaking through, it is possible to reduce the discomfort when abutting against the leg, and it is possible to give an impression of a thin absorbent article and improve the wearing feeling.

[0040] According to a preferred embodiment, based on the technical solution of Embodiment 11, the technical solution of Embodiment 12 may have the following features. The second side panel is a laminated sheet of the film layer and a liquid-permeable non-woven fabric layer. According to this embodiment, it is possible to achieve both the effect of suppressing discomfort by the soft deformation of the non-woven fabric layer and the effect of suppressing liquid leakage by the film layer. In addition, in the form having a wing, by having a non-woven fabric layer, it is easy to form a habitual bend of the wing, maintain the folded state, and it is not easy to recover. By maintaining the folded state of the wing, it is possible to maintain the crease of the wing and reduce the discomfort caused to the leg.

[0041] The absorbent article of Mode 13 includes: a front-back direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side sheets disposed at least on both sides in the width direction of the absorbent body. The side sheets have a first side sheet and a second side sheet that extend along the width direction from the outer side edges of the absorbent body in the width direction. The first side sheet has a skin-side folded-back portion that is folded back toward the skin side from a side fold line located at a position outside the outer side edge of the absorbent body in the width direction and a non-skin-side folded-back portion that is folded back toward the non-skin side from the side fold line. The second side sheet has a covering region that covers the non-skin-side surface of the non-skin-side folded-back portion. A non-joined region where the non-skin-side folded-back portion and the covering region are not joined extends from the side fold line toward the inside in the width direction. The average coefficient of friction (MIU) of the skin-side surface of the second side sheet is lower than the average coefficient of friction (MIU) of the outer surface of the first side sheet. According to this mode, when the wearer's leg presses the absorbent article toward the inside in the width direction, the wearer's leg inserts into the region between the first side sheet and the second side sheet in the non-joined region that extends from the side fold line toward the inside in the width direction and rubs against the skin-side surface of the covering region. At this time, since the average coefficient of friction (MIU) of the skin-side surface of the second side sheet is low, the second side sheet smoothly adheres to the leg, and the discomfort when adhering to the leg can be reduced. Also, according to the smooth adhesion feel of the second side sheet, the wearer can more easily feel the ease of slippage rather than the cushioning of the absorbent article, and it is easy to obtain the impression of a thin type that deforms along the surface rather than a thick absorbent article with cushioning. Therefore, according to the feel during wearing, the wearer can easily obtain the impression of whether it is a thin type, and the wearing comfort can be improved.

[0042] The absorbent article of Mode 14 includes: a front-back direction, a width direction, and a thickness direction that are orthogonal to each other; a crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; an absorbent body disposed at least in the crotch region; and side flaps disposed at least on both sides in the width direction of the absorbent body. The side flaps have a skin-side region that forms the surface on the skin side of the absorbent article at a position outside the outer edge in the width direction of the absorbent body. A liquid-impermeable film layer is provided in the skin-side region. According to this mode, the legs or crotch of the wearer rub against the skin-side region during wearing. At this time, since the skin-side region is a liquid-impermeable film layer, the skin-side region smoothly adheres to the leg, and the discomfort during adhesion and rubbing can be reduced. In addition, according to the smooth adhesion feeling of the skin-side region, the wearer can more easily feel the ease of slippage compared to the cushioning property of the absorbent article, and it is easier to obtain an impression of a thin type that deforms along the surface rather than a thick absorbent article with cushioning. Therefore, according to the feeling during wearing, the wearer can easily obtain an impression of whether it is a thin type, and the wearing feeling can be improved.

[0043] (2) Schematic structure of the absorbent article of the embodiment

[0044] Hereinafter, with reference to the drawings, the absorbent article 1 of the embodiment will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic diagrams, and the ratios of the respective dimensions are different from the actual ones. Therefore, the specific dimensions and the like should be judged with reference to the following description. In addition, there may also be parts with different relationships and ratios of the dimensions between the drawings. The absorbent article 1 can be an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, or a fecal pad. The absorbent article 1 is an article used by being worn on a wearing article such as underwear. The absorbent article 1 of the embodiment is a daily-use sanitary napkin and has a longitudinal shape.

[0045] Figure 1 is a top view of the absorbent article 1 observed from the skin side T1. Figure 2 is a top view of the absorbent article 1 observed from the non-skin side T2. Figure 3 is along Figure 1 the cross-sectional view taken along the line A - A shown.

[0046] Figure 4 is along Figure 1 the cross-sectional view taken along the line B - B shown. Figure 5 is Figure 3The absorbent article 1 is an enlarged view of the C portion shown. Here, the "skin side" corresponds to the side facing the wearer's skin during use. The "non-skin side" corresponds to the side facing the wearer's skin during use. The absorbent article 1 has a front-to-back direction L, a width direction W, and a thickness direction T that are orthogonal to each other. In the front-to-back direction L of the absorbent article 1, the side that contacts the wearer's lower abdomen is called the "front side", and the side that contacts the wearer's buttocks is called the "rear side".

[0047] The absorbent article 1 has a front region S1, a rear region S2, and a crotch region S3. The crotch region S3 is a region arranged opposite to the excretion opening of the wearer, such as the vaginal opening. It is a region arranged in the crotch of the wearing article and arranged between the legs of the wearer when the absorbent article 1 is worn on the wearing article. The front region S1 is located at a position closer to the front side than the crotch region S3. The front end edge of the front region S1 defines the front end edge of the absorbent article 1. The rear region S2 is located at a position closer to the rear than the crotch region S3. The rear end edge of the rear region S2 defines the rear end edge of the absorbent article 1. The crotch region S3 may be a region located in the center of the region obtained by dividing the absorbent article 1 into three equal parts in the front-to-back direction L. In addition, in the absorbent article 1 having wings, the crotch region S3 may be a region provided with wings 5.

[0048] like Figure 6 As shown, the absorbent article 1 has a crotch central region S33 located in the center of the region formed by dividing the crotch region S3 into three equal parts in the front-to-back direction L, a crotch front region S31 located on the front side of the region formed by dividing the crotch region into three equal parts, and a crotch rear region S32 located on the rear side of the region formed by dividing the crotch region into three equal parts. The absorbent article 1 has a front outer region S11 located on the front side of the region formed by dividing the front region S1 into two equal parts in the front-to-back direction L, and a front inner region S12 located on the rear side of the region formed by dividing the front region S1 into two equal parts in the front-to-back direction L. The absorbent article 1 has a rear outer region S21 located on the rear side of the region formed by dividing the rear region S2 into two equal parts in the front-to-back direction L, and a rear inner region S22 located on the front side of the region formed by dividing the rear region S2 into two equal parts.

[0049] In addition, the outer portion of the present invention is a portion that includes the outer edge in the width direction W and occupies a certain range in the width direction W. The outer edge is the outer edge in the width direction W. In addition, the outer edge of a constituent member that occupies a certain range in the front-rear direction L is an edge formed by connecting the points on the outer side in the width direction W in the entire constituent member. The inner portion of the present invention is a portion that includes the inner edge in the width direction W and occupies a certain range in the width direction W. The inner edge is the inner edge in the width direction W. In addition, the inner edge of a constituent member that occupies a certain range in the front-rear direction L is an edge formed by connecting the points on the inner side in the width direction W in the entire constituent member. Furthermore, the front end portion and the rear end portion of the present invention are portions that include the edges in the front-rear direction L and occupy a certain range in the front-rear direction L. The front edge and the rear edge are the edges in the front-rear direction L. The outer end portion includes the front end portion and the rear end portion, and the outer edge includes the front edge and the rear edge. In addition, the inner side edge is an edge that includes the inner edge and extends along the front-rear direction L. The outer side edge is an edge that includes the outer edge and extends along the front-rear direction L. In addition, in this specification, the term "along the front-rear direction L" means a direction having an angle of less than 45° with respect to the front-rear direction L, and the term "along the width direction W" means a direction having an angle of less than 45° with respect to the width direction W.

[0050] The absorbent article 1 may have at least one of a wing 5 disposed in the crotch region S3 and a hip flap (not shown) disposed in the rear side region S2. The absorbent article 1 of the present embodiment has a wing 5 and does not have a hip flap. The wing 5 protrudes outward in the width direction W in the crotch region S3 and folds back to the non-skin side T2 of the wearing article S (see Figure 8 ). A wing fixing portion 62 for fixing the wing 5 to the wearing article may be provided on the surface of the non-skin side T2 of the wing 5. The hip flap protrudes outward in the width direction W in the rear side region S2 and is disposed along the surface of the skin side of the wearing article when worn.

[0051] The absorbent article 1 may have at least an absorber 40, a skin side sheet 11, and a non-skin side sheet 20. The absorber 40 only needs to be disposed in at least the crotch region S3, and may also be disposed in the front side region S1 and the rear side region S2. The absorber 40 of the present embodiment is disposed in the front side region S1, the rear side region S2, and the crotch region S3. The absorber 40 has an absorbent material for absorbing liquid. Examples of the absorbent material can include hydrophilic fibers, cellulose-based fibers (such as pulp), and superabsorbent polymer (SAP) 44.

[0052] Figure 6 is a top view of the absorber 40, Figure 7 is a top view of the absorbent sheet 45. Figure 9 isFigure 3 The enlarged view of part D shown is a schematic cross-sectional view of the absorbent sheet 45. The absorbent body 40 may include an absorbent sheet 45 formed by covering the skin side T1 and the non-skin side T2 of the superabsorbent polymer 44 with a sheet 48. The absorbent sheet 45 may be a so-called SAP sheet, which may be formed by sandwiching the superabsorbent polymer 44 with one folded sheet or multiple sheets. Cellulosic fibers may also be disposed between the sheets 48 of the absorbent sheet 45 together with the superabsorbent polymer 44.

[0053] The "absorbent sheet" of the present invention is a sheet formed by sandwiching only a superabsorbent polymer as an absorbent material between the skin side and the non-skin side with a sheet, or a sheet that contains a superabsorbent polymer and cellulosic fibers as absorbent materials and satisfies any one of (1) the weight ratio of the superabsorbent polymer in the absorbent material is 50% or more, preferably 70% or more, (2) the unit area weight of the cellulosic fibers is less than 100 g / m 2 , and (3) the thickness of the portion other than the sheet is less than 1 mm (including 0 mm).

[0054] The absorbent sheet 45 may be provided with only one layer or multiple layers. The absorbent sheet 45 of the present embodiment may have a first absorbent sheet 451 and a second absorbent sheet 452 disposed at a position closer to the skin side T1 than the first absorbent sheet 451. The first absorbent sheet 451 and the second absorbent sheet 452 each include a superabsorbent polymer 44 and a sheet 48 covering the skin side T1 and the non-skin side T2 of the superabsorbent polymer 44.

[0055] The sheet of the first absorbent sheet 451 and the sheet 48 of the second absorbent sheet 452 may be the same or different. Preferably, the sheet 48 of the first absorbent sheet 451 may be a spunbond nonwoven fabric or a hydroentangled nonwoven fabric, and the sheet 48 of the second absorbent sheet 452 may be a thermally bonded nonwoven fabric. In addition, the unit area weight of the superabsorbent polymer of the first absorbent sheet 451 and the unit area weight of the superabsorbent polymer of the second absorbent sheet 452 may be the same or different. Preferably, the unit area weight of the superabsorbent polymer of the first absorbent sheet 451 may be higher than the unit area weight of the superabsorbent polymer of the second absorbent sheet 452. Since the unit area weight of the superabsorbent polymer of the second absorbent sheet located on the skin side is lower, gel blocking caused by the superabsorbent polymer during repeated absorption of body fluids can be suppressed, and continuous absorption of body fluids can be achieved using the second absorbent sheet located on the non-skin side.

[0056] Either the outer edge 451E of the first absorbent sheet 451 is located on the outer side in the width direction W with respect to the outer edge 452E of the second absorbent sheet 452, or the outer edge 451E of the first absorbent sheet 451 is located on the inner side in the width direction W with respect to the outer edge 452E of the second absorbent sheet 452. The length of the first absorbent sheet 451 in the width direction W and the length of the second absorbent sheet 452 in the width direction W may also be the same. In the present embodiment, the outer edge 451E of the first absorbent sheet 451 is located on the outer side in the width direction W with respect to the outer edge 452E of the second absorbent sheet 452. In addition, the absorbent body 40 may include other absorbent sheets in addition to the first absorbent sheet 451 and the second absorbent sheet 452.

[0057] The absorbent body 40 has a side region R45 extending from the outer edge in the width direction W of the non-skin side T2 surface of the absorbent sheet 45 toward the inner side in the width direction W. In a form having a plurality of absorbent sheets 45, the side region R45 is provided on the non-skin side T2 surface of the absorbent sheet 45 located at the position closest to the non-skin side T2. In the present embodiment, the side region R45 is provided on the non-skin side T2 surface of the first absorbent sheet 451. In a form where the absorbent sheet 45 constitutes the non-skin side T2 surface of the absorbent body 40, the side region R45 is provided on the non-skin side T2 surface of the absorbent body 40. In addition, in a form where the absorbent sheet 45 does not constitute the non-skin side T2 surface of the absorbent body 40 (for example, in a form where an absorbent core is disposed on the non-skin side T2 of the absorbent sheet), the side region R45 is provided on a surface of the absorbent body 40 other than the non-skin side T2 surface. The outer edge of the side region R45 is the outer edge 45E of the absorbent sheet 45 (located at the position closest to the non-skin side T2), and the inner edge of the side region R45 may be the outer edge of the absorbent core 41 or the outer edge of the crotch joining portion 31.

[0058] The absorbent body 40 may also include an absorbent core 41. The absorbent core 41 may be a laminated cellulose-based fiber and is disposed across the center in the width direction W of the absorbent article 1. Examples of the cellulose-based fiber include pulp. In a plan view of the absorbent article 1, the area of the absorbent core 41 may be larger than the area of the absorbent sheet 45, and the absorbent sheet 45 may be disposed in the entire region where the absorbent core 41 is disposed. The absorbent core 41 may include cellulose-based fibers and a superabsorbent polymer 44 together. However, the weight ratio of the superabsorbent polymer 44 to the entire absorbent material of the absorbent core 41 is lower than the weight ratio of the superabsorbent polymer 44 to the entire absorbent material of the absorbent sheet 45.

[0059] The absorber 40 may have an auxiliary absorption layer having a nonwoven fabric disposed overlapping the absorbent core 41. The auxiliary absorption layer only needs to have a nonwoven fabric disposed overlapping the absorbent core 41, and it may be composed only of a nonwoven fabric or may be composed of a nonwoven fabric and other absorbent materials (such as superabsorbent polymers). The auxiliary absorption layer may be composed of the above-mentioned absorbent sheet, may be composed of a core wrapper, or may be composed of a nonwoven fabric other than the core wrapper and the absorbent sheet. The auxiliary absorption layer only needs to have a portion overlapping the absorbent core 41, and may also have a portion not overlapping the absorbent core 41. The auxiliary absorption layer may be disposed only at a position closer to the skin side T1 than the absorbent core 41, may be disposed only at a position closer to the non-skin side T2 than the absorbent core 41, or may be disposed on both the skin side T1 and the non-skin side T2 of the absorbent core 41. The auxiliary absorption layer of the present embodiment is composed of the sheet 48 of the first absorbent sheet 451 and the sheet 48 of the second absorbent sheet. The auxiliary absorption layer may also be composed of an airlaid pulp sheet.

[0060] The shape of the absorbent article in a plan view and the shape of the auxiliary absorption layer (the first absorbent sheet 451 and the second absorbent sheet 452 in the present embodiment) may be different. The absorbent article may have a laminated region where the absorbent sheet and the auxiliary absorption layer are laminated and an auxiliary region where the absorbent core is not disposed and the auxiliary absorption layer is disposed. In the laminated region, the absorbent sheet and the auxiliary absorption layer may overlap each other in contact or may overlap with other members interposed therebetween. In the present embodiment, the absorbent core is disposed in the region overlapping the auxiliary absorption layer and is not disposed in the region not overlapping the auxiliary absorption layer. Therefore, the laminated region R41 is the region where the absorbent core 41 is disposed in the plan view of the absorber (refer to Figure 6 ). The absorbent core is separated in the front-rear direction, and the laminated region R41 is also separated in the front-rear direction L. The region sandwiched by the laminated regions separated in the front-rear direction constitutes the auxiliary region R42. The auxiliary region R42 is the region where the absorbent core 41 is not disposed in the plan view of the absorber 40. The boundary between the laminated region R41 and the auxiliary region R42 is the outer edge of the absorbent core.

[0061] The absorber 40 has at least an absorbent sheet 45 and contains a superabsorbent polymer 44 with a relatively high absorption capacity. Therefore, the absorber 40 is formed in a thin shape while ensuring the absorption capacity. Regarding the thickness of the absorber 40, the average thickness of the central region among the regions obtained by trisecting the absorber 40 in the width direction may be 0.4 mm or more and 3.0 mm or less, and the average thickness of the lateral regions among the regions obtained by trisecting the absorber 40 in the width direction may be 0.4 mm or more and 2.0 mm or less. Since the thickness of the absorber 40 in this embodiment is thin, it is possible to suppress the discomfort during wearing caused by its stiffness and thickness while ensuring the absorption capacity. In addition, the average thickness of the lateral regions in the absorber may be thinner than the average thickness of the central region. Further, in a state where the absorbent article is frozen with liquid nitrogen so that the thickness of the absorbent article does not change, the absorbent article is sectioned along a cross-section in the width direction, and after air-drying for 24 hours, the thickness of the sectioned surface is measured at 5-mm intervals in the width direction, and the average thickness can be calculated using the average value thereof.

[0062] The skin-side sheet 11 is a sheet disposed closer to the skin side T1 than the absorber 40 and in contact with the wearer. The skin-side sheet 11 can be made of any sheet-like material having a structure that allows liquid to pass through, such as non-woven fabric, spun fabric, perforated plastic sheet, or mesh sheet. The skin-side sheet 11 may have a central sheet that covers the center in the width direction W of the absorbent core 41 and a hydrophobic side sheet disposed at a position outside the central sheet in the width direction W, or may be composed of only one sheet (for example, the central sheet). The skin-side sheet 11 in this embodiment is composed of one sheet.

[0063] The absorbent article 1 may have an auxiliary sheet 25 disposed between the skin-side sheet 11 and the absorber 40. The auxiliary sheet 25 is a sheet that assists in sucking body fluid from the skin-side sheet 11 side to the absorber 40 side and can be made of a liquid-permeable sheet.

[0064] The absorbent article 1 may have a main pressing portion 81 that presses at least the skin-side sheet 11 and the absorber 40 in the thickness direction. The main pressing portion 81 may press a part of the layers such as the absorbent sheet 45 that constitutes the absorber 40 and the skin-side sheet 11, or may press the entire region in the thickness direction T of the absorber 40 and the skin-side sheet 11. Alternatively, the main pressing portion 81 is formed by pressing the skin-side sheet 11, the absorbent core 41, and the absorbent sheet 45 (the first absorbent sheet 451 and the second absorbent sheet 452) in the region where the absorbent core 41 and the absorbent sheet 45 overlap, and is formed by pressing the skin-side sheet 11 and the absorbent sheet 45 (the first absorbent sheet 451 and the second absorbent sheet 452) in the region where only the absorbent sheet 45 is disposed without the absorbent core 41.

[0065] The main body pressing part 81 can extend linearly (straight or curved) in a top view. The main body pressing part is not only a continuous line shape, but can also be an aggregate of a plurality of pressing component parts 82 arranged linearly. The pressing component parts 82 only need to be arranged at intervals, and their shapes can be dot-shaped or other patterns (such as star patterns, heart patterns). The main body pressing part 81 can have a region composed only of the pressing component parts 82 arranged at intervals (such as Figure 1 R85 of Figure 1 R86). In addition, the main body pressing part 81 can have a region composed of the pressing component parts 82 arranged at intervals and a linear pressing part 83 surrounding the pressing component parts 82 (such as

[0066] The non-skin side sheet 20 is a sheet arranged at a position on the non-skin side T2 with respect to the absorber 40. The non-skin side sheet 20 only needs to have at least a part of the region arranged at a position on the non-skin side T2 with respect to the absorber 40, and can also have a region not arranged at a position on the non-skin side T2 with respect to the absorber 40 (such as a region arranged at a position on the skin side with respect to the absorber 40). The non-skin side sheet 20 can have a first non-skin side sheet 21 that at least covers the side region R45 and a second non-skin side sheet 22 arranged at a position on the non-skin side T2 with respect to the first non-skin side sheet 21 and joined to the first non-skin side sheet 21 by a non-skin side joining part 30. The non-skin side T2 surface of the absorber sheet 45 in the present embodiment is composed of the first absorber sheet 451. Therefore, the side region R45 extending from the outer edge 45E in the width direction W to the inside in the width direction W of the non-skin side T2 surface of the absorber sheet 45 is the region extending from the outer edge 451E in the width direction W of the first absorber sheet 451 to the inside in the width direction W of the non-skin side T2 surface of the first absorber sheet 451. The first non-skin side sheet 21 covers the side region R45 of the non-skin side T2 surface of the first absorber sheet 451.

[0067] The first non-skin side sheet 21 can have a first region 211 covering the non-skin side T2 surface of the absorber sheet 45 and a second region 212 folded back toward the skin side from the outer edge in the width direction W of the first region 211. It can be that the first region 211 is joined to the second non-skin side sheet 22 by a non-skin side joining part 30, and the second region 212 is joined to the skin side surface of the skin side sheet 11 by a skin side joining part 35. The first region 211 of the first non-skin side sheet 21 can cover the side in the width direction W instead of covering the center in the width direction W of the non-skin side surface of the absorber 40. In addition, the second region 212 of the first non-skin side sheet 21 can cover the side in the width direction W instead of covering the center in the width direction W of the skin side T1 surface of the skin side sheet 11. A pair of the first non-skin side sheets 21 can be arranged at intervals in the width direction W. The first non-skin side sheet 21 can be composed of a hydrophobic sheet (such as a hydrophobic non-woven fabric).

[0068] The second non-skin side sheet 22 only needs to have a region covering the surface of the non-skin side T2 of the first non-skin side sheet 21, and may also extend to a position outside the outer edge of the first non-skin side sheet 21 in the width direction W. In the form with wing parts, the second non-skin side sheet 22 may be disposed on the skin side surface of the wing part 5, and preferably, it may cover the non-skin side surface of the absorber 40 and be disposed across the wing part. A pair of the second non-skin side sheets 22 may be disposed at intervals in the width direction W. The second non-skin side sheet 22 may be made of a hydrophobic non-woven fabric or a film.

[0069] The non-skin side sheet 20 may have a third non-skin side sheet 23, and the third non-skin side sheet 23 is disposed on the non-skin side T2 surface of the absorbent article 1. The third non-skin side sheet 23 may be disposed across the center in the width direction W of the absorbent article 1 and be disposed on the non-skin side T2 surface of the absorbent article 1 within the entire region in the plan view of the absorbent article 1. The center in the width direction W of the non-skin side T2 surface of the absorber 40 may not be covered by either the first non-skin side sheet 21 or the second non-skin side sheet 22 but be covered by the third non-skin side sheet 23. The third non-skin side sheet 23 may be a liquid-impermeable sheet. As the liquid-impermeable sheet, a sheet formed by bonding a breathable resin film to a non-woven fabric such as a laminated non-woven fabric, a spunbond, or a hydroentangled non-woven fabric may be used.

[0070] The non-skin side joint part 30 may have at least one of a crotch joint part 31 disposed in the crotch region S3 and a front-back joint part 32 disposed in at least one of the front side region S1 and the rear side region S2. The crotch joint part 31 is the joint part of the non-skin side joint part 30 disposed in the crotch region S3. The front-back joint part 32 is the joint part of the non-skin side joint part 30 disposed in at least one of the front side region S1 and the rear side region S2. The crotch joint part 31 may not reach the outer edge of the crotch region S3 or may reach the outer edge of the crotch region S3. In addition, in the form where the crotch joint part 31 reaches the outer edge of the crotch region S3, the crotch joint part 31 may also be connected to the front-back joint part 32.

[0071] The front-back joining part 32 can be disposed only in the front region S1, or only in the rear region S2, or in both the front region S1 and the rear region S2. The front-back joining part 32 of the present embodiment is disposed such that the front-back joining part 32 disposed in the front region S1 and the front-back joining part 32 disposed in the rear region S2 are separated in the front-back direction L. The front-back joining part 32 may have a first front-back joining part 321 and a second front-back joining part 322 that are separated from the first front-back joining part 321 in the width direction W and are located outside the first front-back joining part 321 in the width direction W. Since the first front-back joining part 321 and the second front-back joining part 322 are separated in the width direction W, each joining part can easily function independently. The first front-back joining part 321 of the present embodiment is connected to the crotch joining part 31.

[0072] A fixing part 60 for fixing the absorbent article 1 to the wearing article may be provided on the non-skin side T2 surface of the absorbent article 1. The fixing part 60 is provided on the non-skin side T2 surface of the absorbent article 1, and in the present embodiment, it is provided on the non-skin side T2 surface of the third non-skin side sheet 23. The fixing part 60 may have a main body fixing part 61 for fixing the absorbent article 1 to the skin side T1 surface of the wearing article S and a wing fixing part 62 disposed on the wing 5 for fixing the absorbent article 1 to the non-skin side T2 surface of the wearing article S. The fixing part 60 is a region provided with a fixing member (such as an adhesive) for fixing the absorbent article 1 to the wearing article. The main body fixing part 61 may be provided at least in a region overlapping the absorbent body 40. The fixing part 60 extends in the front-back direction L and is provided in plurality at intervals in the width direction W. In addition, in a modified example, the fixing part 60 may extend in the width direction W and be provided in plurality at intervals in the front-back direction L. The fixing part 60 may be covered by a packaging sheet (not shown) or a release sheet 65 that independently packages the absorbent article 1 before use.

[0073] In this embodiment, four main body fixing parts 61 are arranged on each of the two sides of the post-treatment member 68 with a space therebetween. The main body fixing part 61 includes a first main body fixing part 611 arranged at the outermost position in the width direction of the main body fixing part 61, a second main body fixing part 612 adjacent to the first main body fixing part 611, a third main body fixing part 613 adjacent to the second main body fixing part 612, and a fourth main body fixing part 614 adjacent to the third main body fixing part 613. They are arranged in the order of the first main body fixing part 611, the second main body fixing part 612, the third main body fixing part 613, and the fourth main body fixing part 614 from the outside to the inside in the width direction. There is a space between each main body fixing part. More specifically, a first gap G611 is provided as the gap between the first main body fixing part 611 and the second main body fixing part 612, a second gap G612 is provided as the gap between the second main body fixing part 612 and the third main body fixing part 613, and a third gap G613 is provided as the gap between the third main body fixing part 613 and the fourth main body fixing part 614.

[0074] The post-treatment member 68 may be provided on the non-skin side T2 surface of the absorbent article 1. The post-treatment member 68 may have a hook member that can engage with the skin-side sheet 11 when the absorbent article 1 is folded or rolled up with the skin side T1 of the absorbent article 1 as the inside when the absorbent article 1 is discarded or the like. The post-treatment member 68 may be arranged across the center in the width direction W and the center in the front-rear direction L of the absorbent article 1. The main body fixing part 61 may be arranged on both sides of the post-treatment member 68 in the width direction W. The post-treatment member 68 may be covered by a release sheet 65 before use.

[0075] (3) The first feature of the absorbent article

[0076] Next, the first feature of the absorbent article will be described in detail. The absorbent article with the first feature is configured such that the outer part of the absorbent body 40 expands more easily when absorbing body fluids and is more likely to transmit the information that the absorbent body 40 has absorbed body fluids to the wearer. The absorbent article with the first feature can be roughly divided into a first form to a fourth form. As a common structure of the first form to the fourth form, the absorbent article 1 includes a front-rear direction L, a width direction W, and a thickness direction T, a crotch region S3, a front region S1, and a rear region S2, an absorbent body 40, a skin-side sheet 11, and a non-skin side sheet 20. As a common structure, the absorbent body 40 has an absorbent sheet 45. As a common structure, the non-skin side sheet 20 has a first non-skin side sheet 21 and a second non-skin side sheet 22 that cover the side region R45. The non-skin side joint 30 that joins the first non-skin side sheet 21 and the second non-skin side sheet 22 has a crotch joint 31.

[0077] Next, each form is described. In the absorbent article 1 of the first form, the side region R45 is provided on the surface of the non-skin side T2 of the absorbent body 40. That is, the absorbent sheet 45 is arranged on the surface of the non-skin side T2 of the absorbent body 40. Since the side region R45 is provided on the surface of the non-skin side T2 of the absorbent body 40, the absorbent sheet 45 is arranged in the area extending from the outer edge in the width direction W of the surface of the non-skin side T2 of the absorbent body 40. Therefore, in the area extending from the outer edge 40E in the width direction W of the surface of the non-skin side T2 of the absorbent body 40, the absorbent sheet 45 is easy to expand toward the non-skin side T2 when absorbing body fluids, and the absorption capacity of the absorbent sheet 45 can be effectively utilized. The area of ​​the surface of the non-skin side T2 of the absorbent body 40 extending from the outer edge in the width direction W to the inner side in the width direction W is located on the outer side of the absorbent body 40, and is easy to be close to the wearer's legs when worn.

[0078] In the absorbent article 1 of the first form, the outer edge 45E of the absorbent sheet 45 disposed in the side region R45 is located at a position that is outside the outer edge 31E of the crotch joint 31 in the width direction W. In the crotch region S3, the outer edge 45E of the absorbent sheet 45 constituting the non-skin side surface of the absorber 40 is located at a position that is outside the outer edge 31E of the crotch joint 31 in the width direction W. In the region that is outside the outer edge 31E of the crotch joint 31 in the width direction W, the first non-skin side sheet 21 and the absorbent sheet 45 are easy to stand up toward the skin side T1 with the crotch joint 31 as the base point, and the absorbent sheet 45 is more likely to expand toward the non-skin side T2 when absorbing body fluids. In addition, by the first non-skin side sheet 21 and the absorbent sheet 45 standing up toward the skin side with the crotch joint 31 as the base point, the expanded absorbent sheet 45 is easy to be attached to the wearer's legs.

[0079] Figure 8 So Figure 5 The enlarged view shown is a reference cross section. Figure 8 (a) is a diagram showing a state in which the absorbent sheet 45 of the absorbent article 1 worn on the wearing article S has not absorbed body fluid. Figure 8 (b) is a diagram showing a state in which the absorbent sheet 45 of the absorbent article 1 worn as a garment absorbs body fluid. Figure 8 (c) is a diagram showing a state in which the absorbent article 1, in which the absorbent sheet 45 has absorbed body fluid, is pressed inward in the width direction W. Figure 8 As shown, when pressed by the legs, the first area 211 of the first non-skin side sheet 21 and the first absorbent sheet 451 are deformed starting from the crotch joint 31, and the legs are easily attached between the first non-skin side sheet 21 and the second non-skin side sheet 22. At this time, the surface of the non-skin side T2 of the first absorbent sheet 451 is attached to the legs through the first non-skin side sheet 21, and the touch of the swollen absorbent sheet 45 is easily transmitted to the legs. Therefore, it is easier to transmit to the wearer the information that the absorbent body 40 has absorbed body fluids.

[0080] In addition, the absorbent sheet 45 that constitutes the side region R45 can be this absorbent sheet in the form where the absorbent sheet is a single layer, and can also be the absorbent sheet (the first absorbent sheet 451 in the present embodiment) located on the non-skin side T2 in the form having a plurality of absorbent sheets. In the form where the outer edge of the absorbent sheet located on the skin side (the second absorbent sheet 452 in the present embodiment) is located outside the outer edge of the absorbent sheet located on the non-skin side T2 (the first absorbent sheet 451), the absorbent sheet located on the skin side can also constitute the absorbent sheet 45 disposed in the side region R45.

[0081] The absorbent article 1 of the second form includes a main body pressing portion 81 and an absorbent core 41. In the absorbent article 1 of the second form, the outer edge 81E of the main body pressing portion 81 is located outside the outer edge 41E of the absorbent core 41 in the width direction W and is located inside the outer edge 45E of the absorbent sheet 45 in the width direction W. In the absorbent article 1 of the second form, in the width direction W, the outer edge of the absorbent sheet is located outside the outer edge of the crotch joining portion 31. In addition, in the second to fourth forms, the absorbent sheet located outside the outer edge 31E of the crotch joining portion 31 in the width direction W is not limited to the absorbent sheet (the first absorbent sheet 451) that constitutes the side region R45, and can also be an absorbent sheet (the second absorbent sheet 452) that does not constitute the side region R45. That is, other layers constituting the absorbent body 40, such as an absorbent sheet, can be disposed in the region on the non-skin side T2 beyond the second non-skin side sheet 22.

[0082] In addition, regarding the relationship between the outer edge 81E of the main body pressing portion 81 and the outer edge 41E of the absorbent core 41, it is sufficient that the outer edge 81E of the main body pressing portion 81 is located outside the outer edge 41E of the absorbent core 41 in the width direction W in at least a part of the region. However, preferably, there is a part in the region extending in the width direction W from the crotch joining portion 31 where the outer edge 81E of the main body pressing portion 81 is located outside the outer edge 41E of the absorbent core 41 in the width direction W. As long as there is a part in the region extending in the width direction W from the crotch joining portion 31 where the outer edge 81E of the main body pressing portion 81 is located outside the outer edge 41E of the absorbent core 41 in the width direction W, there can also be a part where the outer edge 81E of the main body pressing portion 81 is located inside the outer edge 41E of the absorbent core 41 in the width direction W.

[0083] The outer edge 45E of the absorbent sheet 45 is located on the outer side in the width direction W with respect to the outer edge 31E of the crotch joint portion 31, and is located on the outer side in the width direction W with respect to the main body pressing portion 81. The outer edge 45E of the absorbent sheet 45 is liable to stand up toward the skin side starting from the main body pressing portion 81, and is liable to stand up toward the skin side starting from the crotch joint portion 31. Therefore, when absorbing body fluid, the absorbent sheet 45 is more liable to expand toward the non-skin side T2, and the expanded absorbent sheet 45 is liable to abut against the wearer's leg. The wearer can truly feel the body fluid absorption performance at the central portion in the width direction of the absorbent body, and at the same time, the risk of body fluid leakage is liable to be transmitted to the wearer at the side portion of the absorbent body. By the expanded absorbent sheet 45 abutting against the leg, the wearer can easily grasp the replacement timing of the absorbent article 1. In addition, the outer edge 45E of the absorbent sheet 45 is located on the outer side in the width direction W with respect to the outer edge 41E of the absorbent core 41. The absorbent sheet 45 is disposed at the outer portion of the absorbent body 40, while the absorbent core 41 is not disposed. Therefore, the outer portion of the absorbent body 40 is more liable to expand due to the swelling of the superabsorbent polymer 44. By the expanded absorbent sheet 45 abutting against the leg, it is more liable to transmit the information that the absorbent body 40 has absorbed body fluid to the wearer.

[0084] The absorbent article 1 in the third form further has a wing 5, and the second non-skin side sheet 22 is disposed so as to cover the side portion region R45 in a region on the non-skin side T2 with respect to the first non-skin side sheet 21 and straddle the wing 5. In addition, similar to the absorbent article 1 in the second form, the outer edge 45E of the absorbent sheet 45 is located on the outer side in the width direction W with respect to the outer edge 31E of the crotch joint portion 31. The outer edge 45E of the absorbent sheet 45 is liable to stand up toward the skin side T1 starting from the crotch joint portion 31. As Figure 8 shown, in a state where the wing 5 is folded back toward the non-skin side T2 of the wearing article S during wearing, the second non-skin side sheet 22 is disposed so as to straddle a region covering the non-skin side surface region of the absorbent body 40 from the region folded back toward the non-skin side T2 of the wearing article S. When the first non-skin side sheet 21 stands up with the crotch joint portion 31 as a base point with respect to the second non-skin side sheet 22, the outer portion of the absorbent body 40 also stands up. In the region extending in the width direction W from the crotch joint portion 31, the absorbent sheet 45 is more liable to expand when absorbing body fluid, and the absorption capacity of the absorbent sheet 45 can be effectively utilized. In addition, by the absorbent sheet 45 standing up toward the skin side with the crotch joint portion 31 as a base point, when the expanded absorbent sheet 45 abuts against the leg at the side portion in the width direction W of the absorbent body 40, it is more liable to abut, and the wearer can easily grasp the replacement timing of the absorbent article 1.

[0085] The absorbent article 1 in the fourth form has a main body fixing part 61 and an absorbent core 41. In the absorbent article 1 in the fourth form, the outer edge 61E of the main body fixing part 61 is located outside the outer edge 41E of the absorbent core 41 and inside the outer edge 45E of the absorbent sheet 45. Similar to the absorbent articles 1 in the second and third forms, in the width direction W, the outer edge 45E of the absorbent sheet is located outside the outer edge 31E of the crotch joining part 31 in the width direction W. In addition, in the form in which a plurality of main body fixing parts 61 are arranged at intervals in the width direction W, the outer edge of the main body fixing part 61 is the outer edge of the main body fixing part 61 located at the outermost position in the width direction W. In addition, since the wing fixing part 62 is not a fixing part for fixing the absorbent article 1 to the skin side T1 of the wearing article S, it does not constitute the main body fixing part 61.

[0086] The outer edge 45E of the absorbent sheet 45 is located outside the outer edge 31E of the crotch joining part 31 in the width direction W, and is located outside the outer edge 61E of the main body fixing part 61 in the width direction W and outside the outer edge 41E of the absorbent core 41. The outer edge of the absorbent sheet is likely to stand up toward the skin side starting from the crotch joining part 31. In addition, the outer edge of the absorbent sheet is located outside the outer edge of the absorbent core 41 in the width direction W. The absorbent sheet 45 is arranged in the outer part of the absorbent body 40, and the absorbent core 41 is not arranged. Therefore, the outer part of the absorbent body 40 is more likely to expand due to the swelling of the superabsorbent polymer 44. And since the outer edge 45E of the absorbent sheet 45 is located outside the outer edge 61E of the main body fixing part 61 in the width direction W, the outer edge 45E of the absorbent sheet 45 is not fixed to the wearing article S and is likely to expand toward the wearing article S side (non-skin side T2) due to the swelling of the superabsorbent polymer 44. Therefore, when absorbing body fluid, the absorbent sheet 45 is more likely to expand toward the non-skin side T2, and the expanded absorbent sheet 45 is likely to adhere to the wearer's leg, and the wearer can easily grasp the replacement timing of the absorbent article 1. In addition, by the expanded absorbent sheet 45 adhering to the leg, it is easier to transmit the information that the absorbent body 40 has absorbed body fluid to the wearer. In addition, since the outer edge 61E of the main body fixing part is located outside the outer edge 41E of the absorbent core 41, it can be fixed to the wearing article until the area where the absorbent sheet with relatively low stiffness is arranged (the area outside the absorbent core in the width direction). Therefore, it is possible to suppress the distortion of the absorbent body caused by the absorbent sheet moving and adhering to the absorbent core.

[0087] The structures of the features of the first to fourth forms described above have been explained, but other structures may also be included in each form. For example, the absorbent article 1 of the first form may also have the structure of the second form, and the structures of other forms may be appropriately adopted. Next, the preferred structures that can be adopted in the first to fourth forms will be explained. The following preferred structures can be adopted in any form.

[0088] The first non-skin side sheet 21 may include a first region 211 and a second region 212. The second region 212 of the first non-skin side sheet 21 may be joined to the surface of the skin side T1 of the skin side sheet 11 by the skin side joint portion 35. Since the outer portion of the absorbent body 40 can be covered by the first non-skin side sheet 21, when standing up toward the skin side with the following crotch joint portion 31 as a base point, the entire thickness direction T of the absorbent body 40 is easily erected. Therefore, the absorbent body 40 that has absorbed body fluid is more easily attached to the legs, and the wearer can further grasp the replacement timing of the absorbent article 1. In addition, since the outer portion of the absorbent body 40 can be covered by the first non-skin side sheet 21, the shape of the absorbent body 40 is easily maintained even when the absorbent sheet 45 swells. Therefore, body fluid can be continuously absorbed, and in addition, the absorbent body 40 is easily kept in contact with the body even when pressed by the body.

[0089] The skin side joint portion 35 may join only the skin side sheet 11 and the second region 212 among the skin side sheet 11, the second region 212, and the absorbent sheet 45. That is, the skin side joint portion 35 may not join the absorbent sheet together with the skin side sheet 11 and the second region 212. Since the skin side joint portion 35 does not join the absorbent sheet 45, it is possible to suppress a situation where the swelling in the thickness direction of the absorbent sheet is hindered by the presence of the skin side joint portion.

[0090] In the width direction W, the outer edge 32E of the front and rear joint portion 32 may be located at a position outside the outer edge 31E of the lower crotch joint portion 31. In other words, the outer edge of the non-skin side joint portion 30 in the front side region S1 may be located at a position outside the outer edge of the non-skin side joint portion 30 in the lower crotch region S3 in the width direction W. Or, the outer edge of the non-skin side joint portion 30 in the rear side region S2 may be located at a position outside the outer edge of the non-skin side joint portion 30 in the lower crotch region S3 in the width direction W. According to this structure, since the outer edge of the lower crotch joint portion 31 is located at a relatively inner position, a region where the absorbent sheet in the lower crotch region S3 swells is ensured, and since the outer edge of the front and rear joint portion 32 is located at a relatively outer position, the planar area of the absorbent body 40 is ensured in the front side region S1 or the rear side region S2, body fluid is absorbed in a relatively wide range in the width direction W, and side leakage can be suppressed.

[0091] In the width direction W, the outer edge 32E of the front and rear joining portion 32 may be located outside the outer edge 45E of the absorbent sheet 45. According to this structure, in at least one of the front region S1 and the rear region S2, it is possible to suppress the situation where the region outside the absorbent sheet 45 in the width direction W stands up excessively by using the front and rear joining portion 32 located outside the absorbent sheet 45 in the width direction W. Therefore, even when the front region S1 and the rear region S2 are deformed due to leg movement or the like, it is possible to ensure the length of the absorbent sheet 45 in the width direction W at the outer end portion of the absorbent sheet 45 in the front-rear direction L. Therefore, in the crotch region S3, the outer portion of the absorbent sheet 45 is made to stand up toward the skin side T1, and in the front region S1 and the rear region S2, the length of the absorbent sheet 45 in the width direction W is ensured, so that both the followability to the body and the effect of covering the body can be achieved. In addition, the outer edge 32E of the front and rear joining portion 32 of the present embodiment is constituted by the outer edge of the second front and rear joining portion 322.

[0092] It may be that in the width direction W, the outer edge 32E of the front and rear joining portion 32 is located outside the outer edge 45E of the absorbent sheet 45, and the inner edge 32I of the front and rear joining portion 32 is located inside the outer edge 45E of the absorbent sheet 45. According to this structure, since the outer edge 32E and the inner edge 32I of the front and rear joining portion 32 straddle the outer edge 45E of the absorbent sheet 45, the situation where the outer edge 45E of the absorbent sheet 45 stands up is suppressed by using the front and rear joining portion 32, and the length of the absorbent sheet 45 in the width direction W can be ensured in at least one of the front region S1 and the rear region S2. For the front region S1 disposed near the leg circumference, it is easy to open a gap between the body and the absorbent article 1, and leakage is likely to occur. In addition, for the rear region S2 disposed on the buttocks, sometimes the buttocks move significantly due to leg movement, and sometimes a gap is opened between the body and the absorbent article 1, resulting in leakage. However, ensuring the length of the absorbent sheet in the width direction W in at least one of the front region and the rear region can suppress leakage. The inner edge 32I of the front and rear joining portion 32 of the present embodiment is constituted by the inner edge of the first front and rear joining portion 321.

[0093] The outer edge 45E of the absorbent sheet 45 may overlap with the front and rear joining portion 32. The outer edge 45E of the absorbent sheet 45 of the present embodiment overlaps with the second front and rear joining portion 322. That is, the outer edge of the second front and rear joining portion 322 is located outside the outer edge 45E of the absorbent sheet 45 in the width direction W, and the inner edge of the second front and rear joining portion 322 is located inside the outer edge 45E of the absorbent sheet 45 in the width direction W. According to this structure, in the front region or the rear region, it is possible to further suppress the situation where the outer edge 45E of the absorbent sheet 45 stands up excessively.

[0094] In a modified example, in the width direction W, the outer edge 45E of the absorbent sheet 45 may be disposed at a position outside the outer edge of the first front-back joining portion 321 and inside the outer edge of the second front-back joining portion 322. Since the second front-back joining portion 322 and the first front-back joining portion 321, which are located inside the outer edge of the absorbent sheet, are separated in the width direction, the swelling of the superabsorbent polymer 44 is not hindered in the separated portion, and the swollen absorbent sheet easily adheres to the wearer's leg.

[0095] In the width direction W, the outer edge 41E of the absorbent core 41 is located inside the outer edge 45E of the absorbent sheet 45. According to this structure, the outer edge 45E of the absorbent sheet 45 is located outside the outer edge 41E of the absorbent core 41 in the width direction W. The absorbent sheet 45 is disposed at the outer portion of the absorbent body 40, and the absorbent core 41 is not disposed. Therefore, the outer portion of the absorbent body 40 is more likely to expand due to the swelling of the superabsorbent polymer 44. By the swollen absorbent sheet adhering to the leg, it is easier to convey to the wearer the information that the absorbent body 40 has absorbed body fluid.

[0096] Preferably, the outer edge of the absorbent core 41 may be inside the outer edge of the first absorbent sheet 451 in the width direction W and inside the outer edge of the second absorbent sheet 452 in the width direction W. According to this structure, the outer portions of both the first absorbent sheet 451 and the second absorbent sheet 452 are more likely to expand due to the swelling of the superabsorbent polymer 44. It is also preferable that, at the position of the maximum width of the absorbent core 41, the outer edge 41E of the absorbent core 41 may be located inside the outer edge 45E of the absorbent sheet 45. In the entire region of the absorbent core 41 in the front-back direction L, a region where the absorbent sheet 45 is disposed and the absorbent core 41 is not disposed is provided outside the absorbent core 41 in the width direction W. Therefore, the outer portion of the absorbent sheet 45 is more likely to expand.

[0097] In the width direction W, the outer edge 41E of the absorbent core 41 may be located closer to the inside than the outer edge 31E of the crotch joint portion 31. The region on the outer side in the width direction W of the outer edge 31E of the crotch joint portion 31 is a region that swells due to the absorbent sheet 45 and is likely to stand up toward the skin side T1. The absorbent core 41 is located closer to the inside than the outer edge 31E of the crotch joint portion 31. The region that swells due to the absorbent sheet 45 and is likely to stand up toward the skin side T1 is separated from the absorbent core 41. Therefore, a deformation that bulges toward the skin side T1 is achieved in the outer portion of the absorbent body 40, and the region where the absorbent core 41 is disposed is not easily affected by this standing-up deformation and can maintain a flat shape along the body. Preferably, the outer edge 41E of the absorbent core 41 may be located closer to the inside than the inner edge of the crotch joint portion 31. More preferably, at the position of the maximum width of the absorbent core 41, the outer edge of the absorbent core 41 may be located closer to the inside than the inner edge of the crotch joint portion 31. In addition, the outer edge 41E of the absorbent core 41 may be located closer to the inside in the width direction than the outer edge of the front and rear joint portions 32 (the outer edge of the second front and rear joint portion in the present embodiment). And, at the position of the maximum width of the absorbent core 41, the outer edge 41E of the absorbent core 41 may be closer to the inside in the width direction than the outer edge of the second front and rear joint portion 322. Preferably, it is disposed at a position closer to the inside than the inner edge of the second front and rear joint portion 322 and closer to the outside in the width direction than the outer edge of the first front and rear joint portion 321.

[0098] In the width direction W, the inner edge 5I of the wing 5 may be located closer to the outside than the outer edge 31E of the crotch joint portion 31. The inner edge 5I of the wing 5 is the root portion of the wing 5 and is the portion where the narrowing is maximized toward the inside in the width direction W. The second non-skin side sheet 22 constituting the wing 5 is folded back toward the non-skin side T2 of the wearing article S with the inner edge 5I of the wing 5 as a base point. The second non-skin side sheet 22 is pulled toward the non-skin side T2 and the outside in the width direction W with the inner edge 5I of the wing 5 located closer to the outside in the width direction W of the outer edge 31E of the crotch joint portion 31 as a base point. As a result, the outer portions of the first non-skin side sheet 21 and the absorbent sheet 45 are more likely to stand up toward the skin side T1 with the outer edge 31E of the crotch joint portion 31 as a base point.

[0099] The inner edge 5I of the wing 5 can be positioned on the outer side in the width direction W relative to the outer edge 45E of the absorbent sheet 45. When the second non-skin side sheet 22 is pulled toward the non-skin side T2 and to the outer side in the width direction W with the inner edge 5I of the wing 5 as a reference point, the outer edge 45E of the absorbent sheet 45 is more likely to stand up toward the skin side T1. In addition, the inner edge 5I of the wing 5 can be positioned on the outer side in the width direction W relative to the outer edge of the first non-skin side sheet 21 (the crease that forms the boundary between the second region 212 and the first region 211 in this embodiment). When the second non-skin side sheet 22 is pulled toward the non-skin side T2 and to the outer side in the width direction W with the inner edge 5I of the wing 5 as a reference point, the absorbent sheet and the first non-skin side sheet 21 are more likely to stand up toward the skin side T1.

[0100] In the width direction W, the outer edge 61E of the main body fixing portion 61 can be positioned on the outer side relative to the outer edge 45E of the absorbent sheet 45. Since the outer edge 61E of the main body fixing portion 61 is positioned on the outer side in the width direction W relative to the outer edge 45E of the absorbent sheet 45, the region overlapping with the outer edge 45E of the absorbent sheet 45 is fixed to the wearing article S by the main body fixing portion 61. Since the region fixed to the wearing article S is stabilized by the main body fixing portion 61, the outer edge 45E of the absorbent sheet 45 is more likely to stand up toward the skin side T1.

[0101] The outer edge 61E of the main body fixing portion 61 can be positioned on the outer side in the width direction W relative to the outer edge 31E of the crotch joining portion 31. The region on the outer side in the width direction W relative to the outer edge 31E of the crotch joining portion 31 is fixed to the wearing article S by the main body fixing portion 61. Therefore, the outer portion of the absorbent sheet 45 is more likely to stand up with the outer edge 31E of the crotch joining portion 31 as a reference point. In addition, the outer edge 61E of the main body fixing portion 61 can be positioned on the outer side in the width direction W relative to the outer edge of the first non-skin side sheet 21. The outer edge of the first non-skin side sheet 21 is more likely to stand up toward the skin side. The outer edge 61E of the main body fixing portion 61 can be positioned on the inner side in the width direction relative to the outer edge 32E of the front and rear joining portion 32.

[0102] In the width direction W, the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 may be offset. Since the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 are offset, only one absorbent sheet is disposed at the outer portion of the absorbent sheet 45 instead of two absorbent sheets. By disposing one absorbent sheet at the outer portion of the absorbent sheet, the thickness is suppressed, and the stiffness can be reduced. The outer portion of the absorbent sheet is easily bent, which helps to reduce discomfort, and this portion is easily expanded when absorbing body fluid, and the absorption capacity can be effectively utilized. Preferably, the outer edge 451E of the first absorbent sheet 451 may be located at a position outside the outer edge 452E of the second absorbent sheet 452 in the width direction W. The outer portion of the first absorbent sheet 451 located on the non-skin side T2 is more easily expanded. By the first absorbent sheet 451 being in contact with the first non-skin side sheet 21, the user can more easily recognize the state of having absorbed body fluid. In addition, in the form in which the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 are offset, preferably, the unit area weight of the superabsorbent polymer of the absorbent sheet (the first absorbent sheet 451 in the present embodiment) extending outside the width direction W may be higher than the unit area weight of the superabsorbent polymer of the absorbent sheet (the second absorbent sheet 452 in the present embodiment) not extending outside the width direction W. The absorbent sheet extending outside the width direction W at the outer portion of the absorber is more easily expanded.

[0103] In the width direction W, the outer edge 45E of the absorbent sheet 45 may be located outside the outer edge of the auxiliary sheet 25. Since the auxiliary sheet 25 does not cover the skin side of the outer portion of the absorbent sheet 45, the outer portion of the absorbent sheet 45 is easily expanded not only toward the non-skin side T2 but also toward the skin side T1. The outer edge of the auxiliary sheet 25 may be disposed at a position outside the outer edge of the maximum width position of the absorbent core 41 in the width direction W. By using the auxiliary sheet to inhale body fluid throughout the entire region in the width direction W of the absorbent core 41, the absorbent core 41 can hold the body fluid inhaled by the auxiliary sheet.

[0104] As Figure 4As shown, the absorbent article 1 may have a region obtained by trisecting in the width direction W a sheet disposition region in which the absorbent sheet 45 is disposed. The sheet disposition region includes not only the region where the first absorbent sheet 451 and the second absorbent sheet 452 overlap, but also the region where only the first absorbent sheet 451 is disposed and the region where only the second absorbent sheet 452 is disposed. The trisected regions have a central region RC located at the center in the width direction W and outer regions RS located at positions on both outer sides in the width direction W relative to the central region RC. The weight ratio of the superabsorbent polymer 44 in the absorbent material in the central region RC may be lower than the weight ratio of the superabsorbent polymer 44 in the absorbent material in the outer regions RS. The weight ratio of the superabsorbent polymer 44 in the absorbent material can be calculated based on the weight of the superabsorbent polymer 44 / the weight of the absorbent material in the state where body fluid is not absorbed. Body fluid is first easily guided to the central region RC disposed opposite to the excretory opening. Since the weight ratio of the superabsorbent polymer 44 in this central region RC is low, clogging caused by the superabsorbent polymer 44 absorbing body fluid is suppressed, and the body fluid guided to the central region RC can be absorbed in the central region RC and guided to the surrounding outer regions RS. Since the weight ratio of the superabsorbent polymer 44 in the outer regions RS is high, the body fluid guided to the outer regions RS can be absorbed. By guiding and absorbing the body fluid laterally in the width direction W within the absorber 40, it is possible to achieve both ensuring the absorption capacity of the body fluid and increasing the absorption speed.

[0105] The first absorbent sheet 451 and the second absorbent sheet 452 each include a superabsorbent polymer 44 and a sheet 48 that covers the skin side T1 and the non-skin side T2 of the superabsorbent polymer 44. The sheet 48 covering the skin side of the superabsorbent polymer and the sheet 48 covering the non-skin side of the superabsorbent polymer can be joined without using an adhesive but by a sheet pressing portion 46 formed by pressing the sheet 48 in the thickness direction. By joining the sheets of the absorbent sheet using the sheet pressing portion 46, the sheets 48 are more easily separated from each other compared to the form joined by an adhesive, and a situation where the swelling of the superabsorbent polymer 44 is hindered due to the joining of the sheets 48 to each other can be suppressed. The sheet pressing portion 46 may have a first sheet pressing portion 461 that joins the sheets of the first absorbent sheet 451 to each other and a second sheet pressing portion 462 that joins the sheets of the second absorbent sheet 452 to each other.

[0106] As Figure 7As shown, a plurality of sheet pressing portions 46 are arranged at intervals in the front-rear direction L and the width direction W in the plan view of the absorbent sheet 45. According to this embodiment, since the sheet pressing portions 46 are arranged at intervals in the front-rear direction L and the width direction W, the joint portions where the sheets joined by the sheet pressing portions 46 are formed are not locally formed, so that the superabsorbent polymer 44 is likely to expand within the entire range in the plan view of the absorbent sheet 45. The sheet pressing portions 46 may be arranged in a staggered manner as in this embodiment, may be arranged at intervals along the front-rear direction L, or may be arranged at intervals along the width direction W.

[0107] As shown in Figure 9 a non-overlapping region NR is provided in which the first sheet pressing portion 461 and the second sheet pressing portion 462 do not overlap in the thickness direction T. The non-overlapping region NR includes a region where the first sheet pressing portion 461 and a portion of the second absorbent sheet 452 other than the second sheet pressing portion overlap, a region where the second sheet pressing portion 462 and a portion of the first absorbent sheet 451 other than the first sheet pressing portion overlap, and a region where a portion of the first absorbent sheet 451 other than the first sheet pressing portion and a portion of the second absorbent sheet 452 other than the second sheet pressing portion overlap. That is, the non-overlapping region NR is a region other than the portion where the first sheet pressing portion 461 and the second sheet pressing portion 462 overlap. In the region where the sheet pressing portions 46 overlap each other, the stiffness locally increases, and there is a possibility of unintentional deformation or discomfort based on this portion. However, by providing the non-overlapping region, it is possible to suppress the situation where the stiffness locally increases, suppress the unintentional deformation based on the portion with higher stiffness, and suppress the discomfort caused by the portion with higher stiffness.

[0108] The area ratio of the non-overlapping region NR in the plan view of the absorbent article 1 to the sheet arrangement region may be 10% or more and less than 50%. Since the area ratio of the non-overlapping region NR to the sheet arrangement region is 10% or more, the region where the sheet pressing portions do not overlap each other occupies 10% or more of the entire sheet arrangement region, which can improve the softness of the absorbent sheet and the followability to the body. In addition, since the area ratio of the non-overlapping region to the sheet arrangement region is less than 50%, the region where any sheet pressing portion is formed is 50% or more of the entire sheet arrangement region, which can maintain the joint state between the sheets. In addition, the area ratio of the region where the first sheet pressing portion and the second sheet pressing portion overlap each other to the sheet arrangement region may be less than 20%, preferably less than 10%. It is possible to reduce the ratio of the region where the sheet pressing portions overlap each other and the stiffness locally increases, improve the softness of the absorbent sheet, and improve the followability to the body.

[0109] (4) The second feature of the absorbent article

[0110] Next, the second feature of the absorbent article will be described in detail. The absorbent article 1 of the second feature is configured to enable the entire absorbent body 40 to follow the body and to allow body fluids to spread over the entire absorbent body 40 to effectively utilize the absorption capacity. The absorbent article 1 of the second feature is roughly divided into a fifth form and a sixth form. As a common structure of the fifth form and the sixth form, the absorbent article 1 includes a longitudinal direction L, a width direction W, and a thickness direction T, a crotch region S3, a front region S1, and a rear region S2, an absorbent body 40, a skin-side sheet 11, and a main body pressing portion 81. As a common structure, the absorbent body 40 has an absorbent core 41 and an auxiliary absorbent layer.

[0111] As a common structure, in the width direction W, the outer edge 41E of the absorbent core 41 is located at a position closer to the inside than the outer edge of the auxiliary absorbent layer. The absorbent core 41 straddles the center of the absorbent article 1 in the width direction W and is disposed opposite the excretory opening. By using the cellulose-based fibers contained in the absorbent core, it is possible to ensure instantaneous absorbency (absorption speed) for menstrual blood and body fluids. In addition, since the outer edge 41E of the absorbent core 41 is located at a position closer to the inside than the outer edge of the auxiliary absorbent layer, when a large amount of body fluid is discharged, the body fluid exceeding the outer edge 41E of the absorbent core 41 is guided to the auxiliary absorbent layer. Moreover, the auxiliary absorbent layer can be used to hold the body fluid.

[0112] In the absorbent article 1 of the fifth form, the main body pressing portion 81 is disposed across the laminated region R41 (see Figure 3 ) where the absorbent core 41 and the auxiliary absorbent layer are laminated and the auxiliary region R42 (see Figure 3 ) where the auxiliary absorbent layer is disposed without the absorbent core 41. That is, the main body pressing portion 81 has a portion straddling the outer edge of the absorbent core 41. In addition, as long as at least a part of the main body pressing portion 81 straddles the laminated region R41 and the auxiliary region R42. In Figure 1 , the portion R81 where the main body pressing portion 81 straddles the laminated region R41 and the auxiliary region R42 is surrounded by a circle with a double-dashed line.

[0113] In the absorbent article 1 adopting the fifth form, since the main body pressing portion 81 is disposed across the laminated region R41 and the auxiliary region R42, even if the absorbent core 41 does not reach the outer part of the absorbent body 40, it is possible to increase the stiffness of the auxiliary region R42 (the region where only the auxiliary absorbent layer is disposed), suppress the deformation of the auxiliary region R42, and ensure the area of the absorbent body 40. In addition, since the main body pressing portion 81 is disposed across the laminated region R41 and the auxiliary region R42, it is possible to transmit force within the range of the two regions, and it is possible to improve the followability to the body over the entire width direction W of the absorbent body 40. By ensuring the area of the absorbent body 40 and enabling the entire absorbent body 40 to follow the body, it is possible to spread body fluids over the entire absorbent body and effectively utilize the absorption capacity.

[0114] In the absorbent article 1 in the sixth form, in the crotch region S3, the distance G41 in the width direction W between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 changes. When the main body pressing portion 81 is located on the inner side of the outer edge 41E of the absorbent core 41 in the width direction W, the distance G41 is the distance along the width direction W between the outer edge 81E of the main body pressing portion 81 and the outer edge 41E of the absorbent core 41. In addition, when the main body pressing portion 81 is located on the outer side of the outer edge 41E of the absorbent core 41 in the width direction W, the distance G41 is the distance along the width direction between the inner edge of the main body pressing portion 81 and the outer edge 41E of the absorbent core 41. Further, when the main body pressing portion 81 is located on the inner and outer sides of the outer edge 41E of the absorbent core 41 in the width direction W, respectively, the distance G41 is the distance between the main body pressing portion 81 close to the outer edge 41E of the absorbent core 41 and the absorbent core. In addition, the distance G41 of the portion of the main body pressing portion 81 straddling the outer edge of the absorbent core 41 is 0 mm.

[0115] The distance G41 may not change over the entire range of the crotch region S3. For example, it preferably changes over a range of more than half in the front-back direction L of the crotch region S3. Regarding whether it changes over a range of more than half in the front-back direction L of the crotch region S3, imaginary lines that divide the crotch region into 10 equal parts in the front-back direction are drawn, the distance G41 on each imaginary line is measured, and when more than 50% of the distances G41 are different, it is determined that the distance G41 changes over a range of more than half in the front-back direction L of the crotch region S3.

[0116] In the absorbent article of the sixth form, in the crotch region S3, the distance G41 between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 changes. The region where the distance between the main body pressing portion 81 and the absorbent core 41 and the distance between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 are longer is likely to deform starting from the portion where the distance between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 is closer. The region where the distance between the main body pressing portion 81 and the absorbent core and the distance between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 are longer functions as a buffer region, absorbs the force when the legs press from the outside in the width direction, and is likely to maintain the shape of the absorbent body 40. Compared with the region overlapping the absorbent core 41, the auxiliary absorbent layer has a lower stiffness in the region extending to a position outside the absorbent core 41 and is more likely to deform. However, by the region between the main body pressing portion 81 and the absorbent core 41 functioning as a buffer region, the deformation of the auxiliary absorbent layer is suppressed, and the area of the absorbent body 40 can be ensured. The absorbent body 40 can be continuously arranged relative to the body, and the followability of the absorbent body 40 to the body can be improved. By ensuring the area of the absorbent body 40 and making the whole absorbent body 40 follow the body, body fluids can be diffused over the whole absorbent body 40 and the absorption capacity can be effectively utilized.

[0117] The fifth and sixth forms may also have other structures. For example, in the absorbent article 1 of the fifth form, it may also have the structure of the sixth form, and the structures of other forms can be appropriately adopted. For example, in the absorbent article 1 of the sixth form, similar to the absorbent article of the fifth form, the main body pressing portion 81 may be arranged across the laminated region R41 and the auxiliary region R42. In addition, in the absorbent article of the fifth form, in the crotch region S3, the distance in the width direction between the main body pressing portion 81 and the outer edge 41E of the absorbent core 41 may change. Next, the preferred structures that can be adopted in the fifth and sixth forms will be described. The following preferred structures can be adopted in any form.

[0118] In the absorbent article of the second feature, the absorber 40 may not have the "absorbent sheet" of the present invention. More specifically, the absorber 40 may also have a so-called SAP sheet other than the "absorbent sheet" of the present invention. However, preferably, in the absorbent article of the third feature, the absorber 40 may have an absorbent sheet 45. In the form in which the absorber 40 has the absorbent sheet 45, the auxiliary absorption layer may be constituted by the absorbent sheet 45. The absorbent sheet 45 constituting the auxiliary absorption layer sandwiches the superabsorbent polymer 44 with the sheet 48 and is less likely to deform than the auxiliary absorption layer constituted by a single non-woven fabric. Therefore, the area of the absorber 40 is ensured and it is easy to continuously adhere to the body. Since the auxiliary absorption layer includes the superabsorbent polymer, the absorber can be made relatively thin while ensuring the absorption capacity. Therefore, the followability to the body can be improved. By ensuring the area of the absorber 40 and making the entire absorber 40 follow the body, body fluids can be diffused over the entire absorber 40 and the absorption capacity can be effectively utilized.

[0119] The auxiliary absorption layer of the present embodiment has a first absorbent sheet 451 and a second absorbent sheet 452 that are separated by the absorbent core 41 in the thickness direction T. According to this structure, the absorption capacity of the absorber 40 can be further improved by using a plurality of absorbent sheets 45, and the absorber 40 can be thinned while ensuring the absorption capacity, thereby improving the followability of the absorber. In addition, in another form, the absorbent sheet 45 may only have the first absorbent sheet 451, and no absorbent sheet 45 is disposed on the skin side T1 of the absorbent core 41. According to this form, even when the skin side sheet 11 is accidentally broken during the formation of the main body pressing portion 81 or the like, the exposure of the superabsorbent polymer 44 on the skin side can be suppressed. In addition, the absorbent sheet 45 may only have the second absorbent sheet 452, and no absorbent sheet 45 is disposed on the non-skin side T2 of the absorbent core 41. The absorbent sheet 45 located on the skin side T1 closer to the absorbent core 41 can suppress the rewetting of body fluids. In addition, on either the skin side T1 or the non-skin side T2 of the absorbent core 41 where no absorbent sheet is disposed, a sheet such as tissue paper or non-woven fabric may or may not be disposed.

[0120] The sheet 48 covering the skin side of the superabsorbent polymer 44 and the sheet 48 covering the non-skin side of the superabsorbent polymer 44 may be joined by a sheet pressing portion 46 formed by pressing the sheet 48 in the thickness direction T. By joining the sheets 48 of the absorbent sheet 45 to each other using the sheet pressing portion 46, the sheet pressing portion 46 becomes a deformation base point, and the absorbent sheet 45 deforms softly, and the followability of the absorber 40 to the body can be further improved. The sheet pressing portion 46 may have a first sheet pressing portion 461 that joins the sheets of the first absorbent sheet 451 to each other and a second sheet pressing portion 462 that joins the sheets of the second absorbent sheet 452 to each other.

[0121] The area ratio of the sheet pressing portion 46 to the total area of the absorber 40 can be higher than the area ratio of the main body pressing portion 81 to the total area of the absorber 40. In a configuration such as this embodiment having a plurality of absorber sheets and provided with a sheet pressing portion in each absorber sheet, it is only necessary to satisfy either one of the conditions that the area ratio of the first sheet pressing portion 461 is higher than the area ratio of the main body pressing portion 81 and that the area ratio of the second sheet pressing portion 462 is higher than the area ratio of the main body pressing portion 81. According to this structure, since the area ratio of the sheet pressing portion 46 of the auxiliary absorption layer is relatively high, the rigidity of the region where the auxiliary absorption layer is disposed is increased, and the followability to the body can be improved while ensuring the area of the absorber 40. By ensuring the area of the absorber 40 and causing the entire absorber 40 to follow the body, body fluid can be diffused over the entire absorber 40 and the absorption capacity can be effectively utilized. Since the area ratio of the main body pressing portion 81 is relatively low, the area of direct contact between the main body pressing portion 81 and the skin is small, and discomfort during wearing can be suppressed.

[0122] As can be Figure 7 shown, a plurality of sheet pressing portions 46 are arranged at intervals in the front-rear direction L and the width direction W in a plan view of the absorber sheet 45. According to this embodiment, the sheet pressing portions 46 are arranged at intervals in the front-rear direction L and the width direction W, and the rigidity of the region where the auxiliary absorption layer is disposed is increased by the sheet pressing portions 46, and the followability to the body can be improved while ensuring the area of the absorber. The sheet pressing portions 46 may be arranged in a staggered pattern as in this embodiment, may be arranged at intervals along the front-rear direction L, or may be arranged at intervals along the width direction W. Since a plurality of sheet pressing portions 46 serving as deformation bases are provided at intervals, the absorber 40 can be more easily deformed more softly by means of the plurality of deformation bases, and the followability of the absorber 40 can be further improved.

[0123] The main body pressing part 81 can be composed of an aggregate of pressing component parts 82 arranged at intervals in the front-rear direction L and the width direction W in the plan view of the absorber 40. The maximum dimension of the sheet pressing part 46 in the plan view of the absorber 40 can be larger than the maximum dimension of the pressing component part 82. The maximum dimensions of the pressing component part 82 and the sheet pressing part 46 are the maximum dimensions in the plan view. Measurements are taken at 5 locations on the sample and the average value is obtained. The main body pressing part 81 is provided on the skin-side sheet 11 and is easy to contact the skin. Since the maximum dimension of the pressing component part 82 is relatively small, the discomfort when the main body pressing part 81 directly contacts the skin can be suppressed. On the other hand, since the maximum dimension of the sheet pressing part 46 is relatively large, the stiffness of the area where the absorber sheet 45 is arranged instead of the absorber core 41 is increased by the sheet pressing part 46, the shape of the absorber 40 is easy to maintain, and the area of the absorber 40 can be ensured. The absorber 40 can be continuously arranged relative to the body, and the followability of the absorber 40 to the body can be improved. By ensuring the area of the absorber 40 and making the whole absorber 40 follow the body, body fluids can be diffused over the whole absorber 40 and the absorption capacity can be effectively utilized.

[0124] In a modified example, the maximum dimension of the sheet pressing part 46 in the plan view of the absorber 40 can be smaller than the maximum dimension of the pressing component part 82. According to this structure, since the maximum dimension of the pressing component part 82 is relatively large, the shape of the main body pressing part 81 is maintained, and it is easier to obtain the effect of diffusing body fluids over the entire width direction W of the absorber 40 and the effect of force transmission across the lamination region R41 and the auxiliary region R42. In addition, since the maximum dimension of the sheet pressing part 46 is relatively small, the influence caused by the sheet pressing part 46 during the swelling of the superabsorbent polymer 44 is suppressed, and the superabsorbent polymer 44 is easy to expand within the overall range in the plan view of the absorber sheet 45, and the absorption capacity can be effectively utilized.

[0125] In the plan view of the absorber 40, the shortest distance between the sheet pressing parts 46 can be longer than the shortest distance between the pressing component parts 82. Since the shortest distance between the pressing component parts 82 is relatively short, the plurality of pressing component parts 82 function integrally as a deformation base point of the absorber 40, and the absorbent article can be deformed in a desired manner. In addition, by the plurality of pressing component parts functioning integrally, it is easier to obtain the effect of diffusing body fluids over the entire width direction W of the absorber 40 and the effect of force transmission across the lamination region R41 and the auxiliary region R42. The region between the sheet pressing parts 46 is a region not pressed by the sheet pressing parts 46, and is a region where the gaps between the fibers of the sheet 48 are relatively large and the superabsorbent polymer 44 is easy to swell. Since the shortest distance between the sheet pressing parts 46 is relatively long, the superabsorbent polymer 44 is easy to swell, and it is easier to effectively utilize the absorption capacity.

[0126] The main body pressing part 81 straddles the outer edge 41E of the absorbent core 41, and has an outer pressing part 811 located at a position outside the outer edge 41E of the absorbent core 41 in the width direction and an inner pressing part 812 located at a position inside the outer edge 41E of the absorbent core 41 in the width direction. The part where the outer pressing part 811 and the inner pressing part 812 are connected becomes a part straddling the laminated region R41 and the auxiliary region R42. The part of the laminated region R41 and the auxiliary region R42 may also be a region R85 composed only of the pressing component parts 82 arranged at intervals, but preferably, it may be a region R86 composed of the pressing component parts 82 and the linear pressing part 83. The region R86 composed of the pressing component parts 82 and the linear pressing part 83 has both the pressing component parts 82 and the linear pressing part 83, and can further obtain the effect of improving the rigidity of the auxiliary region R42 and the effect of being able to transmit force to the laminated region R41 and the auxiliary region R42.

[0127] The main body pressing part 81 may have an outer pressing part 811 and an inner pressing part 812 in the crotch region S3. The crotch region S3 is liable to bear the force applied from the legs or the like toward the inside in the width direction. According to this structure, the outer pressing part 811 can bear the force before being applied to the outer edge 41E of the absorbent core 41, and the deformation of the outer edge 41E of the absorbent core 41 can be suppressed. In addition, the inner pressing part 812 is used to suppress the deformation of the absorbent core 41, and it is easy to maintain the shape of the absorbent core 41, and it is more easy to effectively utilize the absorption capacity.

[0128] The main body pressing part 81 may also have an outer pressing part 811 and an inner pressing part 812 in the regions other than the crotch region S3 (the front region S1 and the rear region S2). In the front region S1 and the rear region S2, the effect of suppressing the deformation of the absorbent core 41 can be further obtained. In addition, the part R81 of the main body pressing part 81 straddling the laminated region R41 and the auxiliary region R42 only needs to be provided in the crotch region S3 at least, but may be provided in the crotch region S3, the front region S1, and the rear region S2 respectively. The area of the absorbent body 40 can be ensured within the entire range in the front-rear direction of the absorbent body 40, and the absorption capacity can be effectively utilized.

[0129] The main body pressing part 81 can be arranged across the overlapping region R41 and the auxiliary region R42 in the crotch region S3 and the front side region S1. The number of parts (R81) across the overlapping region R41 and the auxiliary region R42 in the front side region S1 can be larger than the number of parts across the overlapping region R41 and the auxiliary region R42 in the crotch region S3. According to this mode, since the number of parts across the overlapping region R41 and the auxiliary region R42 in the crotch region S3 is small, while suppressing the deformation of the absorber 40 in the crotch region S3, it is also possible to suppress the discomfort caused by the excessive increase in the rigidity of the crotch region S3. In addition, since the number of parts across the overlapping region R41 and the auxiliary region R42 in the front side region S1 is large, it is easy to continuously ensure the length in the width direction of the absorber 40 in the front side region S1, and the absorber can be attached in a planar manner along the groin part.

[0130] The main body pressing part 81 can be arranged across the overlapping region R41 and the auxiliary region R42 in the crotch region S3 and the rear side region S2. The number of parts across the overlapping region R41 and the auxiliary region R42 in the rear side region S2 can be larger than the number of parts across the overlapping region R41 and the auxiliary region R42 in the crotch region S3. According to this mode, since the number of parts across the overlapping region R41 and the auxiliary region R42 in the crotch region S3 is small, while suppressing the deformation of the absorber 40 in the crotch region S3, it is also possible to suppress the discomfort caused by the excessive increase in the rigidity of the crotch region S3. In addition, since the number of parts across the overlapping region R41 and the auxiliary region R42 in the rear side region S2 is large, it is possible to maintain the shape of the absorber 40 in the rear side region S2 that is easily deformed due to the movement of the buttocks, and continuously ensure the length in the width direction of the absorber 50.

[0131] The part R81 of the main body pressing part 81 across the overlapping region R41 and the auxiliary region R42 can be respectively arranged in the front side and the rear side of the crotch narrowest position 41CN (refer to Figure 6 ) in the crotch region. By arranging the main body pressing part 81 across the outer edge 41E of the absorption core at a position outside the crotch narrowest position 41CN, which is the narrowest in width of the absorption core, in the crotch region where the force of the leg is easily borne, it is easy to suppress the deformation in the width direction of the crotch narrowest position 41CN, and it is more easy to effectively utilize the absorption capacity.

[0132] At least a part of the main body fixing portion 61 may be disposed in the auxiliary region R42. The auxiliary region R42 is fixed to the wearing article S by means of the main body fixing portion 61. Since the region fixed to the wearing article S is stable, deformation of the auxiliary region R42 is suppressed, and the area of the auxiliary region R42 can be ensured. The area of the main body fixing portion 61 disposed overlapping the auxiliary region R42 may be larger than the area of the main body fixing portion 61 disposed overlapping the stacking region R41. More preferably, the main body fixing portion 61 may be disposed without overlapping the stacking region R41 and only overlapping the auxiliary region R42. According to this structure, while maintaining the shape of the auxiliary region R42, the flexibility of the stacking region R41 where the absorbent core 41 is disposed and has a relatively high rigidity can be maintained, and the entire absorbent body can be deformed softly to improve the followability to the body.

[0133] At least a part of the main body fixing portion 61 may overlap with the main body pressing portion 81 disposed in the auxiliary region R42. According to this structure, the region of the auxiliary region R42 where the main body pressing portion 81 is disposed is fixed to the wearing article S by means of the main body fixing portion 61. Since the region fixed to the wearing article S is stable, unintentional deformation of the main body pressing portion 81 in the auxiliary region R42 can be suppressed. By stabilizing the shape of the main body pressing portion 81, the area of the absorbent body can be ensured and the followability to the body can be improved.

[0134] In the width direction W, the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 may be offset. Since the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 are offset, only one absorbent sheet is disposed in the outer portion of the absorbent sheet 45 instead of two absorbent sheets. The thickness of the outer portion of the absorbent sheet is suppressed by disposing one absorbent sheet, and the rigidity can be reduced. The outer portion of the absorbent sheet is easy to bend, which helps to reduce discomfort, and this portion is easy to expand when absorbing body fluids, and the absorption capacity can be effectively utilized.

[0135] The absorbent sheet 45 may contain a superabsorbent polymer 44 and a cellulose-based fiber. By the presence of the cellulose-based fiber, the situation where the superabsorbent polymer flows unintentionally is suppressed, and the superabsorbent polymer can be disposed within the overall range in the plan view of the absorbent sheet. The unit area weight of the cellulose-based fiber of the absorbent sheet may be less than the unit area weight of the superabsorbent polymer of the absorbent sheet. Since the unit area weight of the cellulose-based fiber is relatively low and the unit area weight of the superabsorbent polymer is relatively high, the thickness of the entire absorbent sheet can be suppressed while ensuring the absorption capacity. By suppressing the thickness of the entire absorbent sheet to improve the followability of the absorbent sheet to the body, discomfort during wearing can be suppressed.

[0136] The thickness of the absorber 40 in the auxiliary region R42 can be less than 80% of the thickness of the absorber in the laminated region R41. The comparison of the thicknesses can be made based on the maximum thickness. According to this method, the thickness of the outer portion of the absorber can be suppressed. Therefore, the discomfort when the outer portion of the absorber abuts against the leg can be suppressed. In addition, in the form having an absorber sheet as the auxiliary absorption layer, when absorbing body fluid, the outer portion of the absorber sheet tends to expand, and the absorption capacity of the absorber sheet can be effectively utilized. The thickness of the absorber 40 in the auxiliary region R42 can be 2.4 mm or less, preferably 1.0 mm or less, and more preferably 0.7 mm or less. The thickness of the absorber 40 in the laminated region R41 can be 3.0 mm or less, preferably 1.5 mm or less. In addition, this thickness can be the average thickness. In a state where the absorbent article is frozen with liquid nitrogen so that the thickness of the absorbent article does not change, the absorbent article is cut along a cross-section in the width direction, and after air-drying for 24 hours, the thickness of this cross-section is measured at 5 mm intervals in the width direction, and the average thickness can be calculated using the average value thereof.

[0137] The non-skin side T2 of the auxiliary region R42 of the absorber can be covered with a hydrophobic sheet. In the present embodiment, the first non-skin side sheet 21 is composed of a hydrophobic sheet, and the non-skin side T2 of the auxiliary region R42 is covered with the first region 211 of the first non-skin side sheet 21. According to this structure, by covering the non-skin side T2 of the auxiliary region R42 with a hydrophobic sheet, side leakage can be suppressed when the superabsorbent polymer 44 of the absorber sheet 45 swells, and the state where the swollen superabsorbent polymer 44 comes into contact with the wearer's leg can be suppressed. In addition, it can be that the skin side T1 of the auxiliary region R42 of the absorber 40 is also covered with a hydrophobic sheet. In the present embodiment, the skin side T1 of the auxiliary region R42 is covered with the second region 212 of the first non-skin side sheet 21. According to this structure, side leakage can also be suppressed when the superabsorbent polymer 44 of the absorber sheet 45 swells, and the state where the swollen superabsorbent polymer 44 comes into contact with the wearer's skin can be suppressed.

[0138] The first non-skin side sheet 21 can be folded back at the outer edge of the absorber 40, cover the outer portion of the absorber 40, and be disposed across the skin side T1 and the non-skin side T2 of the absorber 40. According to this structure, side leakage can be further suppressed when the superabsorbent polymer 44 of the absorber sheet 45 swells.

[0139] The skin-side joint portion 35 can join only the skin-side sheet 11 and the second region 212 among the skin-side sheet 11, the second region 212, and the absorbent sheet 45. That is, the skin-side joint portion 35 can join the absorbent sheet without joining it together with the skin-side sheet 11 and the second region 212. Since the skin-side joint portion 35 does not join the absorbent sheet 45, it is possible to suppress a situation where the presence of the skin-side joint portion hinders the expansion of the absorbent sheet in the thickness direction, and the absorption capacity can be effectively utilized.

[0140] (5) The third feature of the absorbent article

[0141] Next, the third feature of the absorbent article will be described in detail. The absorbent article 1 having the third feature is configured to improve the wearing feeling by reducing the discomfort of the absorbent article 1, and to give an impression that the absorbent article 1 is a thin type by the touch of the absorbent article 1, thereby being able to improve the wearing feeling. The absorbent article 1 having the third feature is roughly divided into the seventh form to the ninth form. As a common structure of the seventh form and the ninth form, the absorbent article 1 includes a longitudinal direction L, a width direction W, and a thickness direction T, a crotch region S3, a front region S1, and a rear region S2, an absorbent body 40, and side sheets.

[0142] The side sheets 90 are disposed at least on both sides in the width direction W of the absorbent body 40. The side sheets 90 can be disposed only at positions outside the absorbent body 40 in the width direction W. The side sheets 90 disposed only at positions outside the absorbent body 40 in the width direction W may overlap with the outer edge 40E of the absorbent body 40, or may be separated from the outer edge 40E of the absorbent body 40 and disposed at positions outside the outer edge 40E of the absorbent body 40 in the width direction W. Alternatively, the side sheets 90 may be disposed not only at positions outside the absorbent body 40 in the width direction W but also overlapping with the absorbent body 40 in the thickness direction T. That is, the side sheets 90 can be disposed across the outer edge 40E of the absorbent body 40 in the width direction W.

[0143] The side sheets 90 can be composed of only one sheet, or can have a first side sheet 91 and a second side sheet 92. The material of the first side sheet 91 and the material of the second side sheet 92 may be the same or different. The first side sheet 91 and the second side sheet 92 can be composed of a non-woven fabric having fibers. The first side sheet 91 and the second side sheet 92 may partially overlap in the thickness direction T, or may be separated without overlapping. In the form in which the first side sheet 91 and the second side sheet 92 overlap, the second side sheet 92 can be disposed on the non-skin side T2 of the first side sheet 91.

[0144] The second side panel 92 may have a protruding region R92 that forms the surface of the skin side T1 of the absorbent article 1 at a position outside the outer edge 91E of the first side panel 91 in the width direction W. The protruding region R92 is a region of the second side panel 92 that is located outside the outer edge 91E of the first side panel 91 in the width direction W and forms the surface of the skin side T1 of the absorbent article 1.

[0145] The first side panel 91 may have a skin-side folded-back portion 912 that folds back toward the skin side T1 from a side fold line located outside the outer edge 40E of the absorbent body 40 in the width direction W, and a non-skin-side folded-back portion 911 that folds back toward the non-skin side T2 from the side fold line. The side fold line forms the outer edge 91E of the first side panel 91. In the form in which the first non-skin-side panel 21 of the present embodiment forms the first side panel 91, the first region 211 of the first non-skin-side panel 21 forms the non-skin-side folded-back portion 911, and the second region 212 of the first non-skin-side panel 21 forms the skin-side folded-back portion 912. The second side panel 92 may have a covering region R91 that covers the surface of the non-skin side T2 of the non-skin-side folded-back portion 911 of the first side panel 91. The covering region R91 may either abut against the surface of the non-skin side T2 of the non-skin-side folded-back portion 911 or overlap with it with other members in between.

[0146] The side panel 90 has a skin-side region that forms the surface of the skin side T1 of the absorbent article 1 at a position outside the outer edge 40E of the absorbent body 40 in the width direction W. The skin-side region may be provided on one side panel or on a plurality of side panels respectively. The side panel 90 may also span the skin-side region and a region other than the skin-side region (the region overlapping the absorbent body).

[0147] Figure 10 is a diagram showing the arrangement pattern of the side panel 90. In addition, in Figure 10 the structures other than the side panel 90 and the absorbent body 40 are omitted. In Figure 10 in the form shown in (a) of Figure 10In the form shown in (a), since the first side piece 91 folded back by the side crease covers the side of the absorber, and the second side piece 92 straddles the covering region R91 and the extending region R92, the leakage resistance of body fluids can be improved. In addition, since the inner edge of the second side piece 92 is located at a position inside the width direction relative to the outer edge of the first side piece 91, the inner edge of the second side piece is not likely to contact the skin, and discomfort can be reduced.

[0148] In Figure 10 the form shown in (b), the first side piece 91 is the same as Figure 10 the form shown in (a). A pair of the first side piece 91 and the second side piece 92 are arranged at intervals in the width direction W. The second side piece 92 does not extend to a position outside the outer edge 91E of the first side piece 91 and does not have an extending region R92. The outer edge 92E of the second side piece 92 coincides with the outer edge 91E of the first side piece 91 or is located at a position inside the width direction W relative to the outer edge 91E of the first side piece 91. The region outside the outer edge 40E of the absorber 40 in the skin-side folded-back portion 912 constitutes the skin-side region. In Figure 10 the form shown in (b), since the first side piece 91 folded back by the side crease covers the side of the absorber, the leakage resistance of body fluids can be improved.

[0149] In Figure 10 the form shown in (c), the first side piece 91 is the same as Figure 10 the form shown in (a). A pair of the first side piece 91 and the second side piece 92 are arranged at intervals in the width direction W. The second side piece 92 does not overlap with the non-skin-side folded-back portion 911 of the first side piece 91 and does not have a covering region R91. The outer edge 92E of the second side piece 92 is located at a position outside the width direction W relative to the outer edge 91E of the first side piece 91. The second side piece 92 has an extending region R92. The region outside the outer edge 40E of the absorber 40 in the skin-side folded-back portion 912 and the extending region R92 constitute the skin-side region. In Figure 10 the form shown in (c), since the number of sheets in the region extending outward in the width direction from the outer edge of the absorber is small, when the wing is folded back to the non-skin side and used, the thickness of the portion contacting the leg is thin, and it is easier to give the impression that the absorbent article 1 is thin. In addition, since the first side piece 91 folded back by the side crease covers the side of the absorber, the leakage resistance of body fluids can be improved.

[0150] In Figure 10In the form shown in (d), the first side sheet 91 is not folded with the side crease as a base point. The first side sheet 91 is disposed so as to cover the entire surface of the skin side T1 of the absorber 40. The first side sheet 91 covers the skin side T1 of the absorber 40 and does not cover the non-skin side T2 of the absorber 40. The second side sheet 92 has an extended area R92 located at a position outside the outer edge of the first side sheet 91 in the width direction. Since the first side sheet 91 does not have a non-skin side folded-back portion, the second side sheet 92 does not have a covering area. The area outside the outer edge 40E of the absorber 40 in the first side sheet 91 and the extended area R92 constitute the skin side area. In Figure 10 In the form shown in (d), the side portion of the absorber is not covered by the first side sheet 91, but the first side sheet 91 and the second side sheet 92 overlap at a position outside the outer edge of the absorber 40 in the width direction, which can improve the leakage resistance of body fluids. In addition, since the inner edge of the second side sheet 92 is located at a position inside the outer edge of the first side sheet 91 in the width direction, the inner edge of the second side sheet is not likely to contact the skin, and discomfort can be reduced.

[0151] In Figure 10 In the form shown in (e), the first side sheet 91 is the same as that in Figure 10 the form shown in (d). Another side sheet is disposed between the first side sheet 91 and the absorber 40. The other side sheet covers the skin side T1 and the non-skin side T2 of the absorber 40. The second side sheet 92 covers the non-skin side T2 of the other side sheet and extends to a position outside the first side sheet 91 in the width direction W. Since the first side sheet 91 does not have a non-skin side folded-back portion, the second side sheet 92 does not have a covering area. The second side sheet 92 extends to a position outside the first side sheet 91 in the width direction W and has an extended area R92. The area outside the outer edge 40E of the absorber 40 in the first side sheet 91 and the extended area R92 constitute the skin side area. In Figure 10 In the form shown in (e), since the side of the absorber is covered by the first side sheet 91 folded back using the side crease and the second side sheet 92 covers the non-skin side T2 of the other side sheet and extends to a position outside the first side sheet 91 in the width direction W, the leakage resistance of body fluids can be improved. In addition, since the second side sheet 92 extends to a position inside the outer edge of the first side sheet 91 in the width direction, the discomfort caused by the inner edge of the second side sheet contacting the skin can be reduced.

[0152] In Figure 10 (a) to Figure 10 (e) of the absorbent article of the third feature is illustratively shown in the arrangement pattern of the side sheet 90, but the arrangement pattern of the side sheet of the third feature is not limited to Figure 10The form shown. Next, the third feature will be described with reference to the absorbent article of the embodiment. In addition, the absorbent article of the embodiment is an example, and the absorbent article of the third feature also includes Figure 10 The arrangement pattern shown, and other structures can be adopted. In Figures 1 to 9 In the illustrated embodiment, the first non-skin side sheet 21 constitutes the first side sheet 91, and the second non-skin side sheet 22 constitutes the second side sheet 92. In Figure 3 The protruding area R92 and the covering area R91 are illustrated.

[0153] Next, the seventh form of the absorbent article of the third feature will be described. In the absorbent article 1 of the seventh form, the side sheet 90 has a first side sheet 91 and a second side sheet 92, and the second side sheet 92 has a protruding area R92. The average coefficient of friction (MIU) of the skin side T1 surface of the protruding area R92 is lower than the average coefficient of friction (MIU) of the outer surface of the first side sheet 91. In addition, the outer surface of the first side sheet 91 is the surface arranged toward the outside in the first side sheet 91. In the structure where the first side sheet 91 is folded based on the side crease, the outer surface of the first side sheet 91 includes the skin side T1 surface, the outer surface in the width direction, and the non-skin side T2 surface. In the structure where the first side sheet covers the skin side of the absorbent body, the outer surface of the first side sheet 91 is the skin side surface. In the structure where the first side sheet 91 covers the non-skin side of the absorbent body 40 and can stand up based on the non-skin side joint portion 30, the outer surface of the first side sheet 91 is the non-skin side surface of the area outside the non-skin side joint portion 30 in the width direction.

[0154] When the absorbent article 1 is pressed inward in the width direction W by the wearer's leg, the wearer's leg rubs against the skin side surface of the protruding area R92 outside the first side sheet 91 in the width direction W. At this time, since the average coefficient of friction (MIU) of the skin side surface of the protruding area R92 is low, the second side sheet 92 smoothly adheres to the leg, preventing the leakage of body fluids by not allowing body fluids to penetrate through, and at the same time reducing the discomfort when adhering to the leg. And according to the smooth adhesion feeling of the second side sheet 92, the wearer is more likely to feel the ease of slipping compared to the cushioning of the absorbent article 1, and it is easier to obtain the impression of a thin type that deforms along the surface rather than a thick absorbent article 1 with cushioning. Therefore, according to the feeling during wearing, the wearer is likely to obtain the impression of whether it is a thin type, and the wearing feeling can be improved.

[0155] Here, the mean coefficient of friction (MIU) can be measured by the following method. Using the KES-FB4-A-AUTO (automated surface tester) manufactured by Kato Tech Co., Ltd., Japan, a 100 mm × 100 mm sample of each sheet is placed on a smooth metal plane test bench for testing. In cases where it is difficult to obtain a 100 mm × 100 mm sample, the sample is cut to an extractable size. Each sample is moved horizontally at a constant speed of 0.1 cm / sec in the machine direction (fiber orientation direction) when manufacturing each nonwoven fabric by 0 cm to 2 cm. Using a friction element (probe) with an outer dimension of 5 mm × 5 mm, under the condition of an initial load of 50 gf, the mean coefficient of friction within the moving range is calculated as MIU. The same measurement is performed 5 times for each sample, and the average is taken as the MIU value of each sample.

[0156] In the absorbent article 1 of the eighth form, the side sheet 90 has a first side sheet 91 and a second side sheet 92. The second side sheet 92 may have an extended area R92. The first side sheet 91 has a skin-side folded-back portion 912 and a non-skin-side folded-back portion 911. The second side sheet 92 has a covering area R91. A non-joined area where the non-skin-side folded-back portion 911 and the covering area R91 are not joined extends from the side fold line toward the inner side in the width direction W. The non-joined area is, in the embodiment, the area between the outer edge 21E of the first non-skin-side sheet 21 and the non-skin-side joining portion 30. According to this structure, when the absorbent article 1 is pressed inward in the width direction by the wearer's leg, the wearer's leg easily abuts near the side fold line of the first side sheet 91. At this time, in the non-joined area, the first side sheet is not joined to the second side sheet and is easily deformed by the pressing. Through the deformation of the first side sheet, the discomfort when the leg abuts against the outer part of the absorbent article can be reduced.

[0157] In the eighth form, the mean coefficient of friction (MIU) of the surface on the skin side T1 of the second side sheet 92 is lower than the mean coefficient of friction (MIU) of the outer surface of the first side sheet 91. According to this structure, when the absorbent article is pressed inward in the width direction by the wearer's leg, the wearer's leg inserts into the area between the first side sheet 91 and the second side sheet 92 in the non-joined area extending from the side fold line toward the inner side in the width direction, and rubs against the surface on the skin side T1 of the covering area R91. At this time, since the mean coefficient of friction (MIU) of the surface on the skin side of the second side sheet 92 is lower, the second side sheet 92 smoothly abuts against the leg, and the discomfort when abutting against the leg can be reduced. Also, according to the smooth abutting touch of the second side sheet 92, the wearer is more likely to feel the ease of slipping rather than the cushioning of the absorbent article 1, and it is easy to obtain the impression of a thin type that deforms along the surface rather than a thick absorbent article 1 with cushioning. Therefore, according to the touch during wearing, the wearer can easily obtain the impression of whether it is a thin type, and the wearing feeling can be improved.

[0158] In the absorbent article 1 of the ninth form, the side sheet 90 has a skin-side region. An impermeable film layer 95 is provided in the skin-side region (see Figure 10 (a) of FIG.

[0159] In the ninth form, the side sheet 90 only needs to have at least one of the first side sheet 91 and the second side sheet 92, and only needs to have a skin-side region in at least one of them. The impermeable film layer 95 is provided on the skin-side surface of the skin-side region. The side sheet constituting the skin-side region may be composed only of the film layer 95, or may be a laminate of the film layer and other layers (such as a non-woven fabric layer 96). In addition, the impermeable film layer means that after taking out this part from the product, 1 ml of physiological saline is dropped from a height of 3 cm to the skin-side surface of this part, and the water droplet does not penetrate to the non-skin-side surface within 5 minutes after dropping. In addition, the dropping is performed by changing the position, and the measurement is performed at three positions. When the water droplet does not penetrate to the non-skin-side surface within 5 minutes at any of the three positions, it is an impermeable film layer. The film layer may not form visually recognizable holes. The film layer may also form fine holes that are not easily visually recognizable (such as holes of 20 μm or less). When it is impossible to judge whether visually recognizable holes are formed in the film layer, it may also be evaluated by the average coefficient of friction (MIU). When the average coefficient of friction (MIU) is 0.3 or less, it can be judged that the film layer does not form visually recognizable holes.

[0160] The seventh to ninth forms may also have other structures. For example, in the absorbent article 1 of the seventh form, it may also have the structures of the eighth and ninth forms, and the structures of other forms may be appropriately adopted. Next, the preferred structures that can be adopted in the seventh to ninth forms will be described. The following preferred structures can be adopted in any form.

[0161] The second side piece 92 can be disposed on the surface of the skin side T1 of the wing 5. In a state where the wing 5 is worn by being folded back to the non-skin side T2 of the wearing article S during wearing, the second side piece 92 is disposed so as to cover the skin side of the wearing article S from the area folded back to the non-skin side T2 of the wearing article S. When the leg abuts against the outer portion of the wearing article S, the second side piece 92 disposed by being involved in the wearing article S is not easily displaced, and the leg slides on the second side piece 92. At this time, since the surface of the skin side T1 of the second side piece 92 smoothly abuts against the skin, it is possible to reduce the discomfort when abutting against the leg, and it is possible to give an impression of a thin absorbent article 1 and improve the wearing feeling.

[0162] The hydrophobicity of the surface of the skin side T1 of the second side piece 92 can be higher than the hydrophobicity of the outer surface of the first side piece 91. Hydrophobicity is the resistance to water pressure and indicates the difficulty of water (body fluid) passing through. In a form in which the second side piece 92 has an extended area R92, even if the body fluid diffuses beyond the first side piece and reaches the second side piece, since the hydrophobicity of the second side piece 92 is relatively high, it is possible to suppress the body fluid from reaching the wearing article and suppress the deterioration of the wearing feeling caused by the attachment of the body fluid to the wearing article. In addition, in a form in which the second side piece 92 has a covering area R91, even if the body fluid reaches the second side piece located on the non-skin side of the first side piece, since the hydrophobicity of the second side piece 92 is relatively high, it is possible to suppress the body fluid from reaching the wearing article and suppress the deterioration of the wearing feeling caused by the attachment of the body fluid to the wearing article.

[0163] The evaluation of hydrophobicity can be performed as follows. First, a sample to be measured is obtained from the absorbent article. When the target piece is joined to other members by an adhesive, welding, etc., the joining portion is taken out by a method such as blowing cold air of a low-temperature jet within a range that does not affect the contact angle of the fiber after removing the adhesive force. After obtaining the sample to be measured, the degree of hydrophobicity is evaluated by the JIS L1092A method (low water pressure method). The larger the measured value, the higher the water resistance can be evaluated.

[0164] The hydrophobicity of the surface of the skin side T1 of the second side piece 92 can be the same as or higher than the hydrophobicity of the surface of the non-skin side T2 of the absorbent article 1. The surface of the non-skin side T2 of the absorbent article 1 can be constituted by a liquid-impermeable sheet, and in the present embodiment, it is constituted by the third non-skin side piece 23. Since the hydrophobicity of the surface of the skin side T1 of the second side piece 92 is the same level as or higher than the hydrophobicity of the surface of the non-skin side T2 of the absorbent article 1, the second side piece 92 does not easily allow the body fluid to pass through, can suppress the body fluid from reaching the wearing article, and can suppress the deterioration of the wearing feeling caused by the attachment of the body fluid to the wearing article.

[0165] The average deviation (SMD) of the surface roughness of the skin side T1 surface of the second side sheet 92 can be lower than the average deviation (SMD) of the surface roughness of the outer surface of the first side sheet 91. Since the average deviation (SMD) of the surface roughness of the first side sheet 91 is relatively high, when the first side sheet 91 is applied against the leg, it does not adhere with a smooth surface but is likely to adhere with points formed by unevenness, reducing the contact area and further suppressing discomfort. On the other hand, since the average deviation (SMD) of the surface roughness of the second side sheet 92 is relatively low, when the wearer's leg slides on the skin side T1 surface of the second side sheet 92, the second side sheet 92 adheres smoothly to the skin. Therefore, it is possible to reduce the discomfort when adhering to the leg and to give the impression of a thin absorbent article, thereby improving the wearing feeling.

[0166] Here, the average deviation (SMD) of the surface roughness can be measured based on the characteristic values of KES manufactured by Kato Tech Co., Ltd., Japan, which are generally known as characteristic values representing the touch feeling of the surface of the sheet (Reference: Standardization and Analysis of Hand Evaluation (2nd Edition), Author: Toshio Kawabata, Published on July 10, 1980). Specifically, using KES-FB4 manufactured by Kato Tech Co., Ltd., a 100 mm × 100 mm sample is placed as a specimen on a test bench of a smooth metal plane for measuring the surface characteristics in each sample. When it is difficult to obtain a 100 mm × 100 mm specimen, the specimen is cut to an extractable size. The average deviation of the surface roughness is measured by applying a load of 10 gf on the front (or back) surface thereof and pressing a contact terminal with a width of 0.5 cm formed by coiling a piano wire with a diameter of 0.5 mm against the specimen. The specimen is horizontally moved at a constant speed of 0.1 cm / sec for 2 cm, and a uniaxial tension of 10 g / cm is applied to the specimen. The SMD (average deviation of the surface roughness) is obtained from the measurement results. The SMD is obtained using 5 specimens, and the average value is taken.

[0167] The amount of fiber fuzzing of the second side sheet 92 can be less than the amount of fiber fuzzing of the first side sheet 91. According to this structure, since the amount of fuzzing of the second side sheet 92 is small, uncomfortable stimuli such as tingling caused by fiber fuzzing are less likely to be perceived by the wearer, and the second side sheet 92 is likely to adhere smoothly to the leg. Therefore, it is possible to reduce the discomfort when adhering to the leg and to give the impression of a thin absorbent article, thereby improving the wearing feeling. The "amount of fiber fuzzing" means the number of fuzzed fibers fn per unit area of the target area. In addition, when comparing the amount of fiber fuzzing in each area, the amount of fiber fuzzing in each area can be compared by performing a friction fastness test, which is used as an evaluation method for fuzzing in this industry. The friction fastness test can be carried out as follows.

[0168] <Friction Fastness Test>

[0169] (1) Cut out a measurement object area from the non-woven fabric forming the surface sheet in a predetermined size (e.g., 300 mm × 150 mm) to obtain a measurement sample.

[0170] (2) Fix the measurement sample on the measurement stage of a staining fastness tester (manufactured by Dainichi Kagaku Seiki Co., Ltd.).

[0171] (3) Mount a 200 g counterweight on the upper surface of the friction terminal of the staining fastness tester, and paste a cloth tape forming a friction surface on the lower surface.

[0172] (4) Rub the surface of the measurement sample fixed on the measurement stage with the friction surface of the above-mentioned friction terminal. At this time, the reciprocating number of the friction terminal is 3 times, and the moving range (reciprocating width) of the friction terminal is 120 mm.

[0173] (5) Observe the fuzzing state of the surface of the measurement sample after being rubbed by the friction terminal.

[0174] A liquid-impermeable film layer 95 can be provided on the surface of the skin side T1 of the second side sheet 92. When the wearer's leg or crotch abuts or rubs against the second side sheet 92, the film layer 95 smoothly abuts against the leg or the like. Therefore, it is possible to reduce the discomfort when abutting against the leg, and it is possible to give an impression of a thin absorbent article and improve the wearing feeling.

[0175] The second side sheet can be composed only of the film layer 95, or can be a laminated sheet of the film layer 95 and a liquid-permeable non-woven fabric layer 96. The non-woven fabric layer 96 is disposed at a position closer to the non-skin side T2 than the film layer 95. By the second side sheet 92 having the film layer 95 and the non-woven fabric layer 96, it is possible to achieve both the effect of suppressing discomfort by the soft deformation of the non-woven fabric layer 96 and the effect of suppressing liquid leakage by the film layer 95. In addition, in the form having the wing 5, by having the non-woven fabric layer 96, it is easy to form a habitual bend of the wing 5 and maintain the folded state, and it is not easy to recover. By maintaining the folded state of the wing 5, it is possible to maintain the crease of the wing 5 and reduce the discomfort caused to the leg.

[0176] The absorbent article 1 may have a backsheet disposed on the non-skin side T2 of the absorber 40 and forming the non-skin side T2 surface of the absorbent article 1. The backsheet may be constituted by the third non-skin side sheet 23 of the present embodiment. In a region on the outer side in the width direction W with respect to the side fold (the outer edge 91E of the first side sheet 91), the backsheet and the second side sheet 92 may be laminated. Between the side fold and the outer edge of the absorber 40, the skin side folded-back portion 912 and the non-skin side folded-back portion 911 may be laminated. The light transmittance of the region where the backsheet and the second side sheet 92 are laminated may be higher than the light transmittance of the region where the skin side folded-back portion 912 and the non-skin side folded-back portion 911 are laminated. According to this structure, the light transmittance of the region where the backsheet and the second side sheet are laminated is relatively high and is easy to penetrate. The wearer can easily obtain the impression that the region where the backsheet and the second side sheet are laminated is thin, is easily deformed softly, and is gentle on the skin. On the other hand, the light transmittance of the region where the skin side folded-back portion and the non-skin side folded-back portion are laminated is relatively low and is not easy to penetrate. The wearer can easily obtain the impression that the region where the skin side folded-back portion and the non-skin side folded-back portion are laminated has a thickness and body fluid is not likely to leak, and can easily obtain a sense of security against leakage. Based on the difference in appearance between the two regions, it is possible to give a sense of security regarding the absorption performance of body fluid while giving an impression of a thin type that is easily deformed and has a relatively thin thickness.

[0177] Herein, the "light transmittance" is measured in accordance with JIS K7105 - 7136. The light transmittance can be measured, for example, using a haze meter (model NDH700P2) manufactured by Nippon Denshoku Industries Co., Ltd. The measurement sensor is a circle with a diameter of 20 mm. When the region to be measured is larger than the measurement sensor, the measurement is carried out as it is. When the region to be measured is smaller than the sensor, for example, a hole with a diameter of 20 mm or less is formed in a sample with a transmittance of 0%, and this hole is fixed at an arbitrary position inside the sensor. Then, the region to be measured is set in the hole, and the transmittance is measured. Comparing with the transmittance without a sample, the transmittance of the region is converted with the transmittance without a sample set as 100. The measurement is carried out at 5 places on the sample, and the average value is taken.

[0178] The absorbent article 1 may have a topsheet that covers the skin side of the absorber 40 at the center in the width direction of the absorber and abuts against the wearer. The topsheet may be a liquid-permeable sheet or may be constituted by the skin side sheet 11 of the present embodiment, and may also be constituted by the side sheet in the form shown in (d) of Figure 10 and Figure 10 (e) of Figure 3As shown, the second region 212 of the first non-skin-side sheet 21 is joined to the skin-side surface of the skin-side sheet 11 by the skin-side joining portion 35. According to this structure, by covering the skin-side surface of the topsheet with the first side sheet 91 that covers the side of the absorbent body, even when body fluid flows along the surface of the topsheet, side leakage can be suppressed by the first side sheet 91.

[0179] Between the side crease and the outer edge of the absorbent body, the skin-side folded-back portion 912, the non-skin-side folded-back portion 911, and the topsheet are laminated. The thickness obtained by combining the backsheet and the second side sheet 92 can be thinner than the thickness obtained by combining the non-skin-side folded-back portion, the skin-side folded-back portion, and the topsheet of the first side sheet 91. The measurement of this thickness is performed by cutting the absorbent article with a cross-section along the width direction in a state where the absorbent article is frozen with liquid nitrogen so that the thickness of the absorbent article does not change, and the thickness of the cut surface can be measured after air-drying for 24 hours. According to this method, since the thickness obtained by combining the backsheet and the second side sheet 92 is thin, the thinness is easily felt when the leg slides on the surface of the second side sheet 92. Especially when the second side sheet 92 forms a wing, when it is wound around the wearing article, the leg easily adheres to the second side sheet 92, and the thinness is more easily transmitted. On the other hand, since the thickness obtained by combining the skin-side folded-back portion, the non-skin-side folded-back portion, and the topsheet is thick, when the leg adheres to the first side sheet 91 from the side crease side, the cushioning provided by the thickness of the first side sheet 91 increases, and the discomfort when adhering to the side crease can be reduced.

[0180] In the absorbent article of the third feature, the absorbent body 40 may not have the "absorbent sheet" of the present invention. More specifically, the absorbent body 40 may have a so-called SAP sheet other than the "absorbent sheet" of the present invention, or may have an absorbent core. However, preferably, in the absorbent article of the third feature, the absorbent body 40 may have an absorbent sheet 45. By the absorbent body having an absorbent sheet with a superabsorbent polymer, the absorbent body can be thinned while ensuring the absorption capacity. Therefore, the thickness of the absorbent article can be suppressed, and the wearing feeling can be further improved by the impression of thinness and the touch of the thin absorbent article.

[0181] The non-skin-side folded-back portion 911 of the first side piece 91 can be joined to the covering region R91 by means of a side joining portion. The side joining portion can be constituted by the non-skin-side joining portion 30 of the present embodiment. In the width direction W, the outer edge of the side joining portion can be located at a position closer to the inside than the outer edge 45E of the absorbent sheet 45. The outer edge of the side joining portion is located at a position closer to the inside in the width direction than the side fold line and the outer edge 45E of the absorbent sheet 45. Therefore, it does not overlap with the region where the first side piece 91 and the second side piece 92 are joined by the side joining portion, but overlaps with the region where the second side piece 92 is not fixed relative to the first side piece 91. Therefore, the outer edge of the absorbent sheet is likely to be deformed, and the discomfort when contacting the leg can be reduced.

[0182] The absorbent article of the third feature is configured to give an impression of being a thin absorbent article 1, and the maximum thickness of the absorbent body is preferably 3.0 mm or less, and preferably, it can be 1.5 mm or less. In addition, the maximum thickness of the absorbent article can be 3.0 mm or less, and preferably, it can be 2.5 mm or less. According to this structure, the thickness of the absorbent article can be suppressed, and the wearing feeling can be further improved by the impression of thinness and the touch of the thin absorbent article.

[0183] (6) The fourth feature of the absorbent article

[0184] Next, the fourth feature of the absorbent article will be described in detail. The absorbent article 1 of the fourth feature is configured to suppress the deformation of the outer edge 41E of the absorbent core 41, and the wearing feeling of the absorbent article 1 can be further improved. The absorbent article 1 of the fourth feature can be roughly classified into the tenth form to the thirteenth form. As a common structure of the tenth form and the thirteenth form, the absorbent article 1 has a longitudinal direction L, a width direction W, and a thickness direction T, a crotch region S3, a front region S1, and a rear region S2, an absorbent body 40, and a main body fixing portion 61. The absorbent body 40 of the fourth feature has an absorbent core 41. The absorbent core 41 is disposed across the center in the width direction W of the absorbent article 1 and is disposed opposite to the vaginal opening or the urinary opening in the crotch region S3, and can rapidly absorb body fluids by the cellulose-based fibers contained in the absorbent core. In the absorbent article of the fourth feature, the absorbent body 40 may not have the "absorbent sheet" of the present invention. More specifically, the absorbent body 40 may have a so-called SAP sheet other than the "absorbent sheet" of the present invention, or may have only the absorbent core. In addition, in the absorbent article of the fourth feature, the absorbent body 40 may also have the "absorbent sheet" of the present invention.

[0185] In the absorbent article 1 of the tenth embodiment, at least a portion of the main body fixing portion 61 is arranged at a position outside the outer edge 41E of the absorbent core 41 in the width direction W in the crotch region S3. According to this structure, when the absorbent article 1 is worn on a wearing article S such as underwear, it is fixed to the wearing article S up to the region outside the outer edge 41E of the absorbent core 41 in the width direction W, and the outer portion of the absorbent article 1 can be prevented from standing up. Therefore, the deformation of the outer edge 41E of the absorbent core 41 and the situation where the outer edge 41E of the absorbent core 41 is pressed against each other can be prevented, and the discomfort when wearing can be prevented.

[0186] For the outer edge 41E of the absorbent core 41, the position in the width direction W in the crotch region S3 can be changed. The absorbent core 41 can be provided with a crotch narrowest position 41CN having the shortest length in the width direction W of the absorbent core 41 in the crotch region S3 and a crotch widest position 41CM having the longest length in the width direction W of the absorbent core 41 in the crotch region S3. Two of the four main body fixing portions 61 (the first main body fixing portion 611 and the second main body fixing portion 612) can be located at a position that is closer to the outside of the width direction W than the outer edge 41E of the absorbent core 41 within the entire area of ​​the crotch region S3. Two main body fixing portions 61 are arranged at a position that is closer to the outside of the width direction W than the widest position 41CM of the crotch, and four main body fixing portions 61 are arranged at a position that is closer to the outside of the width direction W than the narrowest position 41CN of the crotch. That is, the inner edge 61I of the main body fixing part 61 may be located outside in the width direction W relative to the outer edge 41E of the absorption core 41 at the narrowest position 41CN of the crotch.

[0187] In the absorbent article 1 of the 10th form, the maximum width of the absorbent core 41 in the crotch central area S33 is shorter than the maximum width of the absorbent core 41 in the crotch front area S31 and shorter than the maximum width of the absorbent core 41 in the crotch rear area S32. According to this structure, if the absorbent article 1 is clamped by the legs when wearing, the absorbent article 1 is pressed by the inner side of the thigh, and the crotch central area S33 is easily pressed to a position closer to the inside of the crotch front area S31 and the crotch rear area S32 in the width direction W. Since the maximum width of the absorbent core 41 is shorter in the crotch central area S33 and longer in the crotch front area S31 and the crotch rear area S32, the shape of the outer edge 41E of the absorbent core 41 is easy to follow the shape of the legs, which can reduce the discomfort when wearing. In this embodiment, the widest position 41CM of the crotch is configured in the crotch front area S31 and the crotch rear area S32, and is not configured in the crotch central area S33.

[0188] In the absorbent article 1 of the eleventh embodiment, the main body fixing portions 61 extend in the front-rear direction L and are arranged at intervals in the width direction W. The main body fixing portions 61 have at least a first main body fixing portion 611 and a second main body fixing portion 612. The second main body fixing portion 612 is located at a position outside in the width direction W subsequent to the first main body fixing portion 611. In the crotch region S3, at least a part of a first interval G611, which is the interval between the first main body fixing portion 611 and the second main body fixing portion 612, is arranged at a position outside in the width direction W with respect to the outer edge 41E of the absorbent core 41. The first interval G611 may be arranged in only a part of the crotch region S3, but preferably, it may be arranged in the entire region of the crotch region S3.

[0189] According to this structure, at least a part of the first main body fixing portion 611 and at least a part of the first interval G611 are arranged in the crotch region S3 at a position outside in the width direction W with respect to the outer edge 41E of the absorbent core 41. When the absorbent article 1 is worn on the wearing article S, it is fixed to the wearing article S up to the region outside in the width direction W with respect to the outer edge 41E of the absorbent core 41, and the situation where the outer portion of the absorbent article 1 stands up can be suppressed. Therefore, the deformation of the outer edge 41E of the absorbent core 41 and the situation where the outer edge 41E of the absorbent core 41 abuts can be suppressed, and the discomfort during wearing can be suppressed. When the absorbent article 1 is clamped by the legs during wearing, the absorbent article is pressed by the inner side of the thigh. At this time, the first interval G611 is arranged at a position outside in the width direction W with respect to the outer edge 41E of the absorbent core 41, and the first interval G611 functions as a buffer region. Therefore, the abutment of the inner side of the thigh against the outer edge 41E of the absorbent core 41 can be made gentle, and the discomfort during wearing can be reduced.

[0190] In addition, in the present embodiment, the first interval G611 and the second interval G612 are located in the entire region of the crotch region at a position outside in the width direction W with respect to the outer edge 41E of the absorbent core, and a part of the third interval G613 is located in the crotch region S3 at a position outside in the width direction W with respect to the outer edge 41E of the absorbent core 41. Since the plurality of intervals are arranged at intervals in the width direction W, a buffer region can be set in stages, and it is easier to obtain the effect of making the abutment of the inner side of the thigh against the outer edge 41E of the absorbent core 41 gentle.

[0191] In the absorbent article 1 of the twelfth embodiment, in the crotch region S3 and the front region S1, at least a part of the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W. The pressing force and deformation in the crotch region S3 are transmitted from the crotch region S3 to the front region S1. At this time, since the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W in the crotch region S3 and the front region S1, when the absorbent article 1 is worn on the wearing article S, it is fixed to the wearing article up to the region outside the outer edge 41E of the absorbent core 41 in the width direction W, and the situation where the outer portion of the absorbent article 1 stands up can be suppressed. Therefore, the deformation of the outer edge 41E of the absorbent core 41 and the situation where the outer edge 41E of the absorbent core 41 abuts can be suppressed, and the discomfort during wearing can be suppressed.

[0192] In the absorbent article 1 of the twelfth embodiment, at least a part of the front edge of the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W in the front region S1. Since the front edge of the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction, the outer portion of the absorbent article 1 in the front region S1 is not likely to stand up, and the discomfort caused by the standing up of the outer portion of the absorbent article 1 in the front region S1 can also be reduced when a force is applied to the front region S1, such as when the legs are moved.

[0193] In the present embodiment, the first main body fixing portion 611 and the second main body fixing portion 612 are located at positions outside the outer edge 41E of the absorbent core 41 in the width direction W within the entire regions of the front region S1 and the crotch region S3. The third main body fixing portion 613 and the fourth main body fixing portion 614 straddle the outer edge 41E of the absorbent core 41 in the front region S1 and the crotch region S3. In addition, the front edges of the first main body fixing portion 611 and the second main body fixing portion 612 are disposed at positions outside the outer edge 41E of the absorbent core 41 in the width direction W, and the front edges of the third main body fixing portion 613 and the fourth main body fixing portion 614 are disposed at positions inside the outer edge 41E of the absorbent core 41 in the width direction.

[0194] In the absorbent article 1 of the 13th form, in the crotch region S3 and the rear side region S2, at least a part of the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W. The pressing force and deformation in the crotch region S3 are transmitted from the crotch region S3 to the rear side region S2. At this time, since the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W in the crotch region S3 and the rear side region S2, when the absorbent article 1 is worn on the wearing article S, it is fixed to the wearing article S up to the region outside the outer edge 41E of the absorbent core 41 in the width direction W, and the situation where the outer portion of the absorbent article 1 stands up can be suppressed. Therefore, the deformation of the outer edge of the absorbent core and the situation where the outer edge of the absorbent core abuts can be suppressed, and the discomfort during wearing can be suppressed.

[0195] In the absorbent article 1 of the 13th form, at least a part of the rear end edge of the main body fixing portion 61 is disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W in the rear side region S2. Since the rear end edge of the main body fixing portion is disposed at a position outside the outer edge of the absorbent core in the width direction, the outer portion of the absorbent article 1 in the rear side region S2 is not easily erected, and the discomfort caused by the erection of the outer portion of the absorbent article in the rear side region when a force is applied to the rear side region during hip movement or the like can also be reduced.

[0196] In the present embodiment, the first main body fixing portion 611 and the second main body fixing portion 612 are located at positions outside the outer edge 41E of the absorbent core 41 in the width direction W within the entire region of the rear side region S2 and the entire region of the crotch region S3. The third main body fixing portion 613 and the fourth main body fixing portion 614 straddle the outer edge 41E of the absorbent core 41 in the rear side region S2 and the crotch region S3. In addition, the rear end edges of all the main body fixing portions 61 are disposed at positions outside the outer edge of the absorbent core in the width direction.

[0197] The characteristic structures of the above-described 10th to 13th forms have been described, but other structures may also be provided in each form. For example, in the absorbent article 1 of the 10th form, the structure of the 11th form may also be provided, and the structures of other forms may be appropriately adopted. Next, the preferred structures that can be adopted in the 10th to 13th forms will be described. The following preferred structures can be adopted in any form.

[0198] The main body fixing part 61 located outside the outer edge 41E of the absorbent core 41 in the width direction W can be continuous across the front region S1, the crotch region S3, and the rear region S2. By suppressing the standing-up state of the outer part of the absorbent article 1 within the entire range of the longitudinal direction L of the absorbent article 1, the discomfort during wearing can be suppressed. In the present embodiment, the first main body fixing part 611 and the second main body fixing part 612 are continuous across the front region S1, the crotch region S3, and the rear region S2, and are located outside the outer edge 41E of the absorbent core 41 in the width direction W within the entire range of the longitudinal direction L of the absorbent article 1. The intervals between the main body fixing parts located outside the outer edge of the absorbent core in the width direction (for example, the first interval G611) can also be continuous across the front region S1, the crotch region S3, and the rear region S2. By providing a buffer region within the entire range of the longitudinal direction of the absorbent article and suppressing the contact with the legs, the discomfort during wearing can be suppressed.

[0199] The wing fixing part 62 can be disposed on the extension line extending outward in the width direction W from the crotch narrowest position 41CN of the absorbent core 41. The region fixed by the wing fixing part 62 corresponds to the crotch region of the wearing article S and is a region easily pinched by the legs. Since the crotch narrowest position 41CN of the absorbent core 41 is disposed in this region, the outer edge 41E of the absorbent core 41 can easily follow the shape of the inner side of the thigh, and the discomfort during wearing can be reduced. In addition, even when the crotch narrowest position 41CN of the absorbent core 41 is pressed, since the wing fixing part 62 disposed on the extension line in its width direction is wound around the wearing article S, the deformation of the absorbent core 41 at the crotch narrowest position 41CN can be suppressed, the shape of the absorbent core 41 can be maintained, and the discomfort caused by the deformation of the absorbent core 41 can be suppressed.

[0200] The wing fixing part 62 of the present embodiment extends in the longitudinal direction L and is disposed at intervals in the width direction W. The wing fixing part 62 of the present embodiment is disposed on the extension line extending in the width direction from the crotch narrowest position 41CN and is not disposed on the extension line extending in the width direction from the crotch widest position 41CM.

[0201] The narrowest position 41CN of the crotch can be disposed at a position rearward of the center of the front-rear direction L of the crotch region S3. When the center of the front-rear direction L of the crotch region S3 is aligned with the center of the front-rear direction L of the crotch region of the wearing article and worn, the vaginal opening is disposed opposite to a region forward of the center of the front-rear direction L of the crotch region S3. The narrowest position 41CN of the crotch is located at a position rearward of the center of the front-rear direction L of the crotch region S3, and the width of the absorbent core 41 in the region disposed opposite to the vaginal opening (the region forward of the center of the front-rear direction of the crotch region) is wider than the width of the narrowest position 41CN of the crotch, and can hold the body fluid discharged from the vaginal opening. By providing the narrowest position of the absorbent core in the crotch, while making the outer edge of the absorbent core follow the shape of the thigh, it is possible to suppress the leakage of body fluid in the crotch region, and the wearing feeling can be further improved. In addition, the narrowest position 41CN of the crotch can be disposed at a position rearward of the center of the front-rear direction L of the wing fixing portion 62.

[0202] The main body fixing portion 61 can be disposed on both sides in the width direction W with the center of the width direction W of the absorbent article 1 interposed therebetween. In the width direction W, the outer edge 41E of the absorbent core 41 at the narrowest position 41CN of the crotch can be disposed at a position inward of the inner edge 61I of the main body fixing portion 61. When the absorbent article is clamped by the legs during wearing, the absorbent article is pressed by the inner side of the thigh. At this time, the narrowest position 41CN of the crotch is located at a position inward of the main body fixing portion 61 in the width direction W, and does not fix to the wearing article S by means of the main body fixing portion 61, and functions as a buffer region. Therefore, it is possible to make the contact of the inner side of the thigh with the outer edge 41E of the absorbent core 41 at the narrowest position 41CN of the crotch gentle, and the discomfort during wearing can be reduced. In addition, by making the contact of the absorbent core 41 at the narrowest position 41CN of the crotch gentle, it is possible to suppress the deformation of the absorbent core 41 at the narrowest position 41CN, maintain the shape of the absorbent core 41, and suppress the discomfort caused by the deformation of the absorbent core.

[0203] In addition, within the crotch region S3, the main body fixing portion 61 can overlap with the absorbent core 41 in a region extending forward from the narrowest position 41CN of the crotch and a region extending rearward from the narrowest position 41CN of the crotch, respectively. Therefore, even if the outer edge 41E of the absorbent core 41 at the narrowest position 41CN of the crotch is not fixed to the wearing article by means of the main body fixing portion 61, the absorbent core can be fixed at the front side and the rear side with respect to the narrowest position 41CN of the crotch, and the deformation of the absorbent core at the narrowest position 41CN of the crotch can be suppressed.

[0204] For the outer edge 41E of the absorbent core 41, the position in the width direction W in the front region S1 can vary. The absorbent core 41 can be provided with a front narrowest position 41FN, which is the shortest in the width direction of the absorbent core, and a front widest position 41FM, which is the longest in the width direction W of the absorbent core 41, in the region where the absorbent core narrows inward in the width direction in the front region S1. In addition, the front narrowest position 41FN can be located at a position outside the crotch narrowest position 41CN in the width direction. The front widest position 41FM can be located at a position outside the crotch widest position 41CM in the width direction. The front widest position 41FM can be the position of the maximum width of the absorbent core. The front widest position 41FM can be arranged at a position in front of the front edge of the main body fixing part 61. According to this structure, the force transmitted through the main body fixing part 61 can be cut off at the front widest position 41FM, and it is easy to ensure the length in the width direction of the front end part of the absorbent article. Given the influence of the pubis, the front end part of the absorbent article is not easily pushed inward in the width direction by the legs. Therefore, by ensuring the length in the width direction of the front end part of the absorbent body, the absorption capacity of the absorbent body can be ensured. In addition, since the front widest position 41FM is not fixed to the wearing article S, it is not easy to transmit force from the wearing article, and it is easy to ensure the length in the width direction of the front widest position 41FM, and the absorption capacity of the absorbent body can be ensured.

[0205] The front narrowest position 41FN can be separated from the boundary between the front region S1 and the crotch region S3 in the front-rear direction L. The force and deformation pressed in the crotch region S3 are transmitted from the crotch region S3 to the front region S1. At this time, the front narrowest position 41FN is separated from the boundary between the front region S1 and the crotch region S3, and it is not easy to transmit the force and deformation from the crotch region S3 side. Therefore, the deformation of the absorbent core 41 at the front narrowest position 41FN can be suppressed, the shape of the absorbent core can be maintained, and the discomfort caused by the deformation of the absorbent core can be suppressed. The distance between the front narrowest position 41FN and the boundary between the front region S1 and the crotch region S3 can be 5 mm or more, and preferably, it can be 10 mm or more.

[0206] The maximum width of the absorbent core 41 in the front outer region S11 can be longer than the maximum width of the absorbent core 41 in the front inner region S12. According to this structure, the force and deformation from the crotch region side are cut off in the front inner region S12 to suppress the deformation of the absorbent core, and the width of the absorbent core 41 in the front outer region S11 is ensured, and front leakage can be suppressed. In the present embodiment, the front narrowest position 41FN is arranged in the front inner region S12, and the front widest position 41FM is arranged in the front outer region S11.

[0207] The absorbent core 41 may also be disposed in the crotch region S3 and the front region S1 respectively, but preferably, it may be disposed across the crotch region S3 and the front region S1. In the region extending outward from the boundary between the front region S1 and the crotch region S3 in both lateral directions of the front-back direction L, the outer edge 41E of the absorbent core 41 may be curved. The pressing force and deformation in the crotch region S3 are transmitted from the crotch region S3 to the front region S1. At this time, the absorbent core 41 is disposed across the crotch region S3 and the front region S1, and the deformation of the absorbent article is suppressed by the absorbent core 41, and the shape of the absorbent article is easily maintained. In addition, since the outer edge 41E of the absorbent core 41 is curved across the boundary between the crotch region S3 and the front region S1, the deformation and force are not directly transmitted but are transmitted in an evasive manner. Therefore, the deformation of the absorbent article 1 is suppressed, the shape of the absorbent article is easily maintained, and the discomfort caused by the deformation of the absorbent article can be suppressed.

[0208] The absorbent core may also be disposed in the crotch region S3 and the rear region S2 respectively, but preferably, it may be disposed in the crotch region S3 and the rear region S2. A low unit area weight portion L41 is provided in the absorbent core 41 in the rear region S2, and the low unit area weight portion L41 is disposed across the two outer edges in the width direction of the absorbent core 41, and the unit area weight of the cellulose-based fibers of the absorbent core 41 is lower than that of the surroundings. According to this embodiment, the force and deformation on the crotch region S3 side can be intercepted by the low unit area weight portion L41 extending in the width direction across the two outer edges in the width direction W of the absorbent core 41, and the shape of the rear end portion of the absorbent core 41 can be easily maintained. In addition, the low unit area weight portion L41 may be a region where fewer cellulose-based fibers are disposed than the surroundings, or may be a region where no cellulose-based fibers are disposed (unit area weight is 0 g / m 3 ).

[0209] The absorbent core 41 of the present embodiment has a first absorbent core 411 disposed across the front region S1, the crotch region S3, and the rear region S2, and a second absorbent core 412 disposed in the rear region S2 and separated from the first absorbent core 411 in the front-back direction L. A low unit area weight portion L41 is provided between the first absorbent core 411 and the second absorbent core 412. The first absorbent core 411 is separated from the front edge of the absorbent body 40 and is located at a position behind the front edge of the absorbent body 40. The second absorbent core 412 is separated from the rear edge of the absorbent body 40 and is located at a position in front of the rear edge of the absorbent body 40. The outer edge of the first absorbent core 411 and the outer edge of the second absorbent core 412 are both separated from the outer edge of the absorbent body and are located at positions inside the absorbent body in the width direction.

[0210] The maximum width of the absorbent core 41 in the rear outer region S21 may be shorter than the maximum width of the absorbent core 41 in the rear inner region S22. According to this structure, by shortening the maximum width of the absorbent core 41 in the rear outer region S21, the absorbent core 41 can easily conform to the groove between the left and right buttocks, and rear leakage can be suppressed. On the other hand, since the maximum width of the absorbent core 41 in the rear inner region S22 is longer, the width of the absorbent core 41 for the perineum is ensured, and leakage near the perineum can be suppressed.

[0211] In the present embodiment, a part of the first absorbent core 411, the low unit area weight portion L41, and a part of the second absorbent core 412 are arranged in the rear inner region S22, and a part of the second absorbent core 412 is arranged in the rear outer region S21. The rearmost widest position 41RM where the length in the width direction W of the absorbent core 41 is the longest in the rear outer region S21 is provided in the rear outer region S21. Rear leakage can be suppressed by the absorbent core at the rearmost widest position 41RM. The rearmost widest position 41RM is provided on the second absorbent core 412. The position 412N where the length in the width direction W of the absorbent core is the shortest in the region where the absorbent core in the second absorbent core 412 narrows inward in the width direction is provided in the rear outer region S21. At the position 412N where the length in the width direction W of the second absorbent core 412 is the shortest, the absorbent core can easily conform to the groove between the left and right buttocks, and rear leakage can be further suppressed. The rearmost widest position 41RM may be arranged at a position rearward of the rear end edge of the main body fixing portion 61. According to this structure, the force transmitted through the main body fixing portion 61 can be cut off by the rearmost widest position 41RM, and it is easy to ensure the length in the width direction of the rear end portion of the absorbent article. In addition, since the rearmost widest position 41RM is not fixed to the wearing article S, it is easy to transmit force from the wearing article, and it is easy to ensure the length in the width direction of the rearmost widest position 41RM.

[0212] The outer edge 41E of the absorbent core 41 may be located at a position outside the outer edge of the post-treatment member 68 in the width direction. Since the absorbent core 41 is arranged at a position outside the outer edge of the post-treatment member 68 in the width direction, even in a posture where the distance between the two legs is short, such as when closing the legs, the post-treatment member 68 is not likely to contact the wearer, and discomfort caused by the post-treatment member can be suppressed. Preferably, the outer edge 41E of the absorbent core 41 may be arranged at a position outside the outer edge of the post-treatment member 68 in the width direction throughout the entire region in the front-rear direction of the outer edge of the post-treatment member 68.

[0213] The main body pressing part 81 can be provided on the skin side piece 11, the absorbent core 41, and the core non-skin side piece disposed at a position on the non-skin side of the absorbent core 41. Here, the core non-skin side piece only needs to be a piece located at a position on the non-skin side T2 of the absorbent core 41, and it can be either the non-skin side piece 20 or the piece 48 of the first absorbent piece 451. In a form where multiple core non-skin side pieces are arranged, the main body pressing part 81 only needs to be provided on at least any one non-skin side piece. According to this structure, since the absorbent core 41 is sandwiched between the skin side piece 11 and the core non-skin side piece, and the skin side piece, the core non-skin side piece, and the absorbent core are joined by the main body pressing part 81, deformation of the absorbent core can be suppressed. Maintaining the shape of the absorbent core can suppress discomfort caused by deformation of the absorbent core.

[0214] The main body pressing part 81 can have an outer pressing part 811 disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W. According to this structure, when a force is applied from the outside to the inside in the width direction W, the outer pressing part 811 is subjected to the force, deforms with the outer pressing part 811 as a base point, or disperses the force in the plane direction by means of the outer pressing part 811, so that the force applied to the outer edge 41E of the absorbent core 41 can be reduced. It is easy to maintain the shape of the absorbent core 41, and discomfort caused by deformation of the absorbent core 41 can be reduced. The outer pressing part 811 can be provided in the crotch region S3, the front side region S1, and the rear side region S2. According to this structure, deformation of the absorbent core 41 is suppressed against the force received from the outside in the width direction W throughout the entire region in the front-rear direction L of the absorbent core 41, and it is easy to maintain the shape of the absorbent core 41.

[0215] The main body pressing part 81 can have an inner pressing part 812 disposed at a position outside the outer edge 41E of the absorbent core 41 in the width direction W. The inner pressing part 812 is arranged to overlap with the absorbent core 41. The deformation of the absorbent core 41 is suppressed by the inner pressing part 812, it is easy to maintain the shape of the absorbent core 41, and discomfort caused by deformation of the absorbent core can be reduced. In addition, the outer pressing part 811 and the inner pressing part 812 can be connected. That is, the main body pressing part 81 can be arranged across the outer edge 41E of the absorbent core 41. It is easy to maintain the shape of the absorbent core 41 by the main body pressing part 81, and discomfort caused by deformation of the absorbent core 41 can be reduced.

[0216] (7) The fifth feature of the absorbent article

[0217] Next, the fifth feature of the absorbent article will be described in detail. The absorbent article 1 of the fifth feature is configured to suppress the deterioration of the wearing feeling when absorbing body fluids and ensure a space for the swelling of the superabsorbent polymer 44, so that the absorption capacity can be effectively utilized. The absorber 40 of the absorbent article 1 of the fifth feature has at least a first absorbent sheet 451 and a second absorbent sheet 452. The first absorbent sheet 451 has a first compression portion 471, which is formed by compressing a plurality of sheets 48 from the outer surface in the thickness direction T of the first absorbent sheet 451 toward the inside in the direction facing each other. Here, the outer surface in the thickness direction T of the first absorbent sheet 451 is the two surfaces of the non-skin side surface and the skin side surface of the first absorbent sheet. In other words, the first compression portion 471 is formed by compressing a plurality of sheets 48 in the direction facing each other between the non-skin side surface and the skin side surface of the first absorbent sheet 451. The second absorbent sheet 452 has a second compression portion 472, which is formed by compressing a plurality of sheets 48 from the outer surface in the thickness direction of the second absorbent sheet toward the inside in the direction facing each other. Here, the outer surface in the thickness direction T of the second absorbent sheet 452 is the two surfaces of the non-skin side surface and the skin side surface of the second absorbent sheet. In other words, the second compression portion 472 is formed by compressing a plurality of sheets 48 in the direction facing each other between the non-skin side surface and the skin side surface of the second absorbent sheet 452.

[0218] The first compression portion 471 and the second compression portion 472 are portions where the sheets are pressed against each other in the facing direction, and the distance between the sheets 48 is shorter than that in the region where no compression portion is formed. The first compression portion 471 and the second compression portion 472 are concepts including the sheet pressing portion 46. The sheet pressing portion 46 is where the absorbent sheet is pressed in the thickness direction. More specifically, the sheets 48 are in contact with each other, and the fibers constituting the sheets 48 are fused and joined to each other. In contrast, the first compression portion 471 and the second compression portion 472 include not only the structure where the sheets 48 are in contact with each other but also the structure where the sheets 48 are not in contact with each other. In addition, as long as the thickness of the sheets 48 is thinned by the compression of the sheets, the fibers constituting the sheets 48 may not be fused. As Figure 9 shown, the first compression portion 471 of the present embodiment is constituted by the first sheet pressing portion 461, and the second compression portion 472 is constituted by the second sheet pressing portion 462.

[0219] Figure 7 is a plan view of the absorbent sheet 45. Figure 7 (a) is a plan view of the first absorbent sheet 451, Figure 7(b) is a top view of the second absorbent sheet 452. The first absorbent sheet 451 and the second absorbent sheet 452 may both be disposed across the center 40CW in the width direction of the absorbent body 40. A plurality of first compression portions 471 and second compression portions 472 are disposed at intervals in the front-back direction L and the width direction W in the top view of the absorbent sheet 45. A plurality of first compression portions 471 and second compression portions 472 are respectively disposed on both sides of the center 40CW in the width direction of the absorbent body 40. The first compression portions 471 and the second compression portions 472 only need to be disposed at intervals, and their shapes may be dot-like or other patterns (such as star patterns, heart patterns). The first compression portions 471 and the second compression portions 472 may be arranged in a staggered manner as in the present embodiment, may be arranged at intervals along the front-back direction L, or may be arranged at intervals along the width direction W.

[0220] As Figure 9 shown, in the crotch region S3, there is a non-overlapping region NR where the first compression portion 471 and the second compression portion 472 do not overlap in the thickness direction T. The non-overlapping region NR includes a first non-overlapping region where a region provided with the first compression portion 471 in the first absorbent sheet 451 overlaps with a region where the second compression portion 472 is not provided in the second absorbent sheet 452, a second non-overlapping region where a region where the first compression portion 471 is not provided in the first absorbent sheet 451 overlaps with a region provided with the second compression portion 472 in the second absorbent sheet 452, and a third non-overlapping region where a region where the first compression portion 471 is not provided in the first absorbent sheet 451 overlaps with a region where the second compression portion 472 is not provided in the second absorbent sheet 452. That is, the non-overlapping region NR is a region other than the portion where the first compression portion 471 and the second compression portion 472 overlap. In the absorbent article of the fifth feature, as long as at least any one of the first non-overlapping region to the third non-overlapping region is provided in the crotch region S3, a region other than the non-overlapping region NR (the region where the first compression portion 471 and the second compression portion 472 overlap) may be provided locally. Preferably, the area of the non-overlapping region NR in the crotch region S3 may be smaller than the area of the region other than the non-overlapping region NR in the crotch region S3.

[0221] In the region where the first compression part 471 and the second compression part 472 overlap, there may be a local increase in stiffness, and involuntary deformation or discomfort may occur with this part as the base point. However, by providing the non-overlapping region NR, the situation of local increase in stiffness is suppressed, involuntary deformation with the stiffer part as the base point is suppressed, and discomfort caused by the stiffer part can be suppressed. In addition, a plurality of the first compression parts 471 and the second compression parts 472 are arranged at intervals in the front-rear direction L and the width direction W in the plan view of the absorbent sheet 45. Even when the first compression part 471 and the second compression part 472 overlap, the overlapping regions are arranged at intervals and do not divide and arrange the regions of the superabsorbent polymer like the conventional form having a sealing part. Therefore, the situation where the region where the superabsorbent polymer 44 swells is difficult to bend is not likely to occur, the deterioration of followability is suppressed, and the wearing feeling can be improved. And since a plurality of deformation base points formed by the first compression part 471 and the second compression part 472 are arranged at intervals in the plan view, it is easy to deform softly using this deformation base point, the followability to the body is improved, and the deterioration of the wearing feeling can be suppressed when absorbing body fluids.

[0222] In addition, in the non-overlapping region NR, since at least one of the first compression part 471 and the second compression part 472 is not arranged in the thickness direction T, it is easy to ensure the swelling space in the thickness direction T, and the absorption capacity can be effectively utilized. And since the first compression part 471 and the second compression part 472 are arranged at intervals in the front-rear direction L and the width direction W, the parts where the sheets approach each other by using the first compression part 471 and the second compression part 472 do not linearly form from one end to the other end of the absorbent sheet 45. Therefore, the superabsorbent polymer 44 is easy to expand within the overall range in the plan view of the absorbent sheet 45, and the absorption capacity can be effectively utilized.

[0223] The first compression part 471 and the second compression part 472 may be constituted by the sheet pressing part 46. According to this structure, since the sheets 48 are joined to each other by the pressing part, compared with the structure in which the sheets are joined to each other by heat sealing, HMA, etc., the joining of the sheets 48 by the sheet pressing part 46 is easy to open when the superabsorbent polymer 44 swells, the swelling space of the superabsorbent polymer 44 is ensured, and the absorption capacity can be effectively utilized.

[0224] The first non-overlapping region, the second non-overlapping region, and the third non-overlapping region can all be provided in the non-overlapping region NR. In the first non-overlapping region, the superabsorbent polymer 44 of the second absorbent sheet 452 is prone to swelling, and is prone to swelling toward the skin side T1 when absorbing body fluid. In the second non-overlapping region, the superabsorbent polymer 44 of the first absorbent sheet 451 is prone to swelling, and is prone to swelling toward the non-skin side T2 when absorbing body fluid. In the first non-overlapping region and the second non-overlapping region, the first absorbent sheet 451 and the second absorbent sheet 452 are prone to swelling in opposite directions in the thickness direction T respectively, and there is no interference between the regions, and it is easy to ensure the swelling region. The third non-overlapping region is prone to swelling both toward the skin side T1 and toward the non-skin side T2 when absorbing body fluid, and it is easier to ensure the absorption capacity. By providing the first non-overlapping region, the second non-overlapping region, and the third non-overlapping region, the superabsorbent polymer 44 is more prone to swelling, and the absorption capacity can be further effectively utilized.

[0225] The shortest distance between the first compression portions 471 and the shortest distance between the second compression portions 472 in the plan view of the absorbent sheet 45 can be longer than the average value of the diameters of the superabsorbent polymer 44 in the state of being dehydrated by a centrifugal separator after being immersed in physiological saline for 60 minutes and drained for 15 minutes. The regions between the first compression portions 471 and the regions between the second compression portions 472 are regions not pressed by the compression portions, and are regions where the voids between the fibers are relatively large and the superabsorbent polymer 44 is prone to swelling. Since the length of this easily swelling region in the plan view is longer than the average diameter after the superabsorbent polymer 44 swells, the superabsorbent polymer 44 is prone to swelling and it is easier to effectively utilize the absorption capacity.

[0226] Here, the shortest distances between the first compression parts 471 and between the second compression parts 472 are average values obtained by randomly measuring the intervals between them in the plan view of the compression parts at 10 positions. In addition, the state after being immersed in physiological saline for 60 minutes, drained for 15 minutes, and then dehydrated using a centrifugal separator is a state that simulates the water retention state of the body fluid (urine) of the superabsorbent polymer 44, which is the "when water is retained" in the present invention. The average value of the diameter of the superabsorbent polymer in the state after being immersed in physiological saline for 60 minutes, drained for 15 minutes, and then dehydrated using a centrifugal separator can be measured by the following method. First, under the conditions of temperature: 20°C, relative humidity: 60%, pressure (standard atmospheric pressure): 1 atm (101.325 kPa) (for example, in a laboratory maintained at these conditions), take out the superabsorbent polymer to be measured from the absorbent article (for example, 0.1 g). Store the superabsorbent polymer in a predetermined container and shake it upside down more than 10 times to evenly mix the particles of the superabsorbent polymer. Accurately measure 1.00 g of the mixed superabsorbent polymer using a spatula or the like and put it into another prepared nylon mesh bag. The nylon mesh bag can be, for example, a bag formed by overlapping two 200 mm × 200 mm square nylon meshes and heat-sealing at positions 5 mm from the ends of the nylon mesh for three sides of the square to form a bag shape with only one side of the square open. As the nylon mesh, for example, a 250-mesh nylon mesh (N-No. 250HD) manufactured by NBC Industries can be used. After putting the superabsorbent polymer into the nylon mesh bag, heat-seal the opening of the nylon mesh bag so that the superabsorbent polymer is sealed without overflowing from the nylon mesh bag. Then, add 1000 ml of physiological saline to a beaker and immerse the nylon bag (superabsorbent polymer) so that one side of the nylon bag containing the superabsorbent polymer touches the bottom of the beaker. Then, in order to minimize the close contact between the superabsorbent polymer and the nylon mesh, fix one side of the upper part of the nylon bag to the edge of the beaker using a clothespin or the like. Leave it in this state for 60 minutes. The physiological saline used is obtained as follows: Place a 3-liter beaker on an electronic balance and zero it, then add ion-exchanged water to 27.0 g of sodium chloride (reagent grade 1) to make it 3000.0 g, and stir with a stirring rod until the dissolution of sodium chloride can be visually observed. After leaving it for 60 minutes, lift the nylon bag containing the superabsorbent polymer out of the beaker and leave it for 15 minutes in a state where the center upper part of the nylon bag is clamped with a clothespin (for example, at a position 5 mm from the upper end of the nylon bag and 50 mm from both side ends) and suspended in the air for draining. Then, use a centrifugal separator (HI30) manufactured by KOKUSAN Corporation, Japan, to dehydrate the drained nylon bag (superabsorbent polymer). For example, dehydrate it at a rotation speed of 850 rpm (150G) for 90 seconds. Then, also use a microscope to measure the diameter of the superabsorbent polymer.The average value is the average of measuring 30 diameters. Five high-absorbency polymers that are samples are taken from the same product, and the average value measured five times is taken as the final value.

[0227] Preferably, the shortest distance between the first compression portions 471 and the shortest distance between the second compression portions 472 in the plan view of the absorbent sheet 45 can be longer than the average value of the diameters of the high-absorbency polymer 44 in a state where it is immersed in physiological saline for 60 minutes and drained for 15 minutes (a state where dehydration is not performed using a centrifuge).

[0228] The maximum size of the first compression portion 471 and the maximum size of the second compression portion 472 in the plan view of the absorbent sheet can be longer than the average value of the diameters of the high-absorbency polymer in a state where it is immersed in physiological saline for 60 minutes, drained for 15 minutes, and then dehydrated using a centrifuge. The maximum size of the first compression portion 471 and the maximum size of the second compression portion 472 are the maximum sizes in the plan view of each compression portion. Measurement is performed at five locations of the sample, and the average value is taken. According to this method, the maximum size of the first compression portion 471 and the maximum size of the second compression portion 472 are smaller than the average diameter when the high-absorbency polymer 44 retains water, suppressing the influence caused by the first compression portion 471 and the second compression portion 472 when the high-absorbency polymer 44 retains water, and the high-absorbency polymer 44 is likely to expand within the overall range in the plan view of the absorbent sheet 45.

[0229] A sheet joint portion may be formed in the absorbent article 1. The sheet joint portion is formed by compressing and joining the first absorbent sheet 451 and the second absorbent sheet 452 in the thickness direction T, and is arranged with an interval in the front-rear direction L and the width direction W in the plan view of the absorbent sheet 45. Either only the first absorbent sheet 451 and the second absorbent sheet 452 may be compressed and joined, or other constituent members (such as the skin-side sheet 11) other than the first absorbent sheet 451 and the second absorbent sheet 452 may also be compressed to indirectly join the first absorbent sheet 451 and the second absorbent sheet 452. The sheet joint portion of the present embodiment is constituted by a pressing constituent portion 82.

[0230] In the plan view of the absorbent sheet 45, the maximum dimension of the sheet joint portion (the compression forming portion 82) may be larger than the maximum dimensions of the first compression portion 471 and the second compression portion 472. According to this structure, since the maximum dimension of the sheet joint portion is relatively large, it is easy to maintain the joint state of the first absorbent sheet 451 and the second absorbent sheet 452, suppress the displacement of the absorbent sheets 45 from each other, and ensure the non-overlapping region NR. In addition, since the maximum dimensions of the first compression portion 471 and the second compression portion 472 are small, the influence caused by the first compression portion 471 and the second compression portion 472 during water retention of the superabsorbent polymer 44 is suppressed, and the superabsorbent polymer 44 is easy to expand within the overall range in the plan view of the absorbent sheet 45.

[0231] In the width direction W, the outer edge 41E of the absorbent core 41 may be located at a position closer to the inside than the outer edge 45E of the absorbent sheet 45. According to this structure, since the absorbent core 41 does not overlap with the outer portion of the absorbent sheet 45, the outer portion of the absorbent sheet 45 is easy to expand when absorbing body fluids, and the absorption capacity can be effectively utilized. Preferably, the outer edge 41E of the absorbent core 41 may be located at a position closer to the inside in the width direction W than the outer edge 451E of the first absorbent sheet 451 and at a position closer to the inside in the width direction W than the outer edge 452E of the second absorbent sheet 452. The outer portions of the first absorbent sheet 451 and the second absorbent sheet 452 are both easy to expand in the thickness direction, and the absorption capacity can be further effectively utilized.

[0232] In the width direction, the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 may be offset. According to this structure, since the outer edge 451E of the first absorbent sheet 451 and the outer edge 452E of the second absorbent sheet 452 are offset, two absorbent sheets 45 are not arranged in the outer portion of the absorbent sheet 45, but one absorbent sheet is arranged. The thickness of the outer portion of the absorbent sheet is suppressed by arranging one absorbent sheet, and the stiffness can be reduced. The outer portion of the absorbent sheet is easy to bend, which helps to reduce discomfort, and this portion is easy to expand when absorbing body fluids, and the absorption capacity can be effectively utilized.

[0233] The absorbent core 41 may be arranged across the center 40CW in the width direction of the absorbent article 1. The first absorbent sheet 451 may be arranged at a position closer to the non-skin side T2 than the absorbent core 41. According to this structure, the absorbent core 41 is arranged across the center in the width direction W of the absorbent article 1 at a position closer to the skin side T1 than the first absorbent sheet 451, and it is easy to absorb the body fluids discharged from the excretory opening. The first absorbent sheet 451 is arranged at a position closer to the non-skin side T2 than the absorbent core 41, and the body fluids guided to the absorbent core 41 are further inhaled toward the non-skin side T2. Even in the case of repeated discharge of body fluids, it is easy to use the absorbent core 41 to retain the body fluids.

[0234] The second absorbent sheet 452 can be disposed at a position closer to the skin side T1 than the absorbent core 41. According to this structure, when the second absorbent sheet 452 disposed at a position closer to the skin side T1 than the absorbent core 41 absorbs body fluid, the superabsorbent polymer 44 swells, thereby being able to suppress rewetting caused by the movement of the temporarily inhaled body fluid toward the skin side T1. In addition, when the body fluid spreading in the planar direction is absorbed on the surface side of the absorbent article 1, the transfer and leakage of the body fluid can be suppressed.

[0235] The absorbent sheet 45 may contain a superabsorbent polymer 44 and cellulose-based fibers. By the presence of the cellulose-based fibers, the situation where the superabsorbent polymer 44 flows inadvertently is suppressed, and the superabsorbent polymer 44 can be disposed within the entire range in the plan view of the absorbent sheet 45. The unit area weight of the cellulose-based fibers of the absorbent sheet 45 may be less than the unit area weight of the superabsorbent polymer 44 of the absorbent sheet 45. Since the unit area weight of the cellulose-based fibers is relatively low and the unit area weight of the superabsorbent polymer 44 is relatively high, while ensuring the absorption capacity, the thickness of the entire absorbent sheet 45 can be suppressed. By suppressing the thickness of the entire absorbent sheet 45, the followability of the absorbent sheet 45 to the body is improved, and the discomfort during wearing can be suppressed.

[0236] The liquid spreading property in the planar direction of the sheet 48 constituting the first absorbent sheet 451 may be higher than the liquid spreading property in the planar direction of the sheet 48 constituting the second absorbent sheet 452. According to this structure, the liquid spreading property in the planar direction of the second absorbent sheet 452 located on the skin side T1 is relatively low, and the body fluid will not spread excessively in the planar direction in the second absorbent sheet 452, and the blockage caused by the swelling of the superabsorbent polymer 44 in the second absorbent sheet 452 can be suppressed. On the other hand, the liquid spreading property in the planar direction of the first absorbent sheet 451 located on the non-skin side T2 is relatively high, the body fluid is inhaled toward the non-skin side T2, and the inhaled body fluid is diffused over a wider range, improving the liquid spreading property in the thickness direction T and the planar direction, and the absorption capacity can be effectively utilized.

[0237] In addition, the liquid spreading property can be compared according to the CRIEM water absorption degree. The longitudinal direction (set as the direction with a length of 200 mm or more) of the test piece when measuring the CRIEM water absorption degree is extracted along the front-rear direction L of the sheet to be measured, and the CRIEM water absorption degree is measured. The one with the longer length is judged to have a higher liquid spreading property. The CRIEM water absorption degree can be measured by the method in accordance with JIS P8141:2004.

[0238] As described above, the present invention has been described in detail using the above-described embodiments. However, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modified and changed forms without departing from the gist and scope of the present invention defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any restrictive meaning for the present invention. The above-described first feature to fifth feature can be appropriately combined. For example, the absorbent article may also have the first feature and the second feature to fifth feature at the same time.

Claims

1. An absorbent article, comprising: The front-back direction, width direction, and thickness direction that are mutually orthogonal; A crotch region disposed in the crotch of the wearer, a front region located at a position anterior to the crotch region, and a rear region located at a position posterior to the crotch region; An absorber that is at least disposed in the crotch region; And Side sheets that are at least disposed on both sides in the width direction of the absorber, wherein The side sheets have a first side sheet and a second side sheet that extend along the width direction with respect to the outer edge in the width direction of the absorber, The second side sheet has an extended region that forms the surface on the skin side of the absorbent article at a position outside the outer edge in the width direction of the first side sheet, The average coefficient of friction MIU of the surface on the skin side of the second side sheet is lower than the average coefficient of friction MIU of the outer surface of the first side sheet.

2. The absorbent article according to claim 1, wherein, The absorbent article is provided with wing flaps that are disposed in the crotch region and are folded back to the non-skin side of the wearing article during wearing, The second side sheet is disposed on the surface on the skin side of the wing flaps.

3. The absorbent article according to claim 1 or 2, wherein, The hydrophobicity of the surface on the skin side of the second side sheet is higher than the hydrophobicity of the outer surface of the first side sheet.

4. The absorbent article according to claim 1 or 2, wherein, The hydrophobicity of the surface on the skin side of the second side sheet is the same as or higher than the hydrophobicity of the non-skin side surface of the absorbent article.

5. The absorbent article according to claim 1 or 2, wherein, The average deviation SMD of the surface roughness of the surface on the skin side of the second side sheet is lower than the average deviation SMD of the surface roughness of the outer surface of the first side sheet.

6. The absorbent article according to claim 1 or 2, wherein, The first side sheet and the second side sheet are made of a non-woven fabric having fibers, The amount of fiber fuzzing of the second side sheet is less than the amount of fiber fuzzing of the first side sheet.

7. The absorbent article according to claim 1 or 2, wherein, The absorbent article has a backsheet that is disposed at a position on the non-skin side with respect to the absorber and forms the non-skin side surface of the absorbent article, The first side sheet has a skin-side folded-back portion that folds back toward the skin side from a side fold line located at a position outside the outer edge in the width direction of the absorber and a non-skin-side folded-back portion that folds back toward the non-skin side from the side fold line, In a region outside the side fold line in the width direction, the backsheet and the second side sheet are laminated, Between the side fold line and the outer edge of the absorber, the skin-side folded-back portion and the non-skin-side folded-back portion are laminated, The light transmittance of the region where the backsheet and the second side sheet are laminated is higher than the light transmittance of the region where the skin-side folded-back portion and the non-skin-side folded-back portion are laminated.

8. The absorbent article according to claim 1 or 2, wherein, The absorbent article has a topsheet that covers the skin side of the central portion in the width direction of the absorber and abuts against the wearer, The first side sheet has a skin-side folded-back portion that folds back toward the skin side from a side fold line located at a position outside the outer edge in the width direction of the absorber and a non-skin-side folded-back portion that folds back toward the non-skin side from the side fold line, The skin-side folded-back portion of the first side sheet is joined to the surface on the skin side of the topsheet.

9. The absorbent article according to claim 8, wherein, The absorbent article has a backsheet which is disposed on the non-skin side of the absorber and forms the non-skin side surface of the absorbent article. In a region outside the side crease in the width direction, the backsheet and the second side sheet are laminated. Between the side crease and the outer edge of the absorber, the skin-side folded-back portion, the non-skin-side folded-back portion, and the topsheet are laminated. The combined thickness of the backsheet and the second side sheet is thinner than the combined thickness of the non-skin-side folded-back portion of the first side sheet, the skin-side folded-back portion, and the topsheet.

10. The absorbent article according to claim 1 or 2, wherein, The absorber has an absorbent sheet which covers the skin side and the non-skin side of the superabsorbent polymer in the thickness direction with a sheet. The first side sheet has a skin-side folded-back portion that folds back toward the skin side from a side crease located outside the outer edge of the absorber in the width direction and a non-skin-side folded-back portion that folds back toward the non-skin side from the side crease. The second side sheet has a covering region that covers the non-skin side surface of the non-skin-side folded-back portion. The non-skin-side folded-back portion is joined to the covering region by a side joining portion. In the width direction, the outer edge of the side joining portion is located inside the outer edge of the absorbent sheet.

11. The absorbent article according to claim 1 or 2, wherein, An impermeable film layer is provided on the skin-side surface of the second side sheet.

12. The absorbent article according to claim 11, wherein, The second side sheet is a laminated sheet of the film layer and a liquid-permeable nonwoven fabric layer.

13. An absorbent article, comprising: A front-back direction, a width direction, and a thickness direction that are orthogonal to each other; A crotch region disposed in the crotch of the wearer, a front side region located on the front side of the crotch region, and a rear side region located on the rear side of the crotch region; An absorber which is disposed at least in the crotch region; And Side sheets which are disposed at least on both sides of the absorber in the width direction, wherein The side sheets have a first side sheet and a second side sheet that extend in the width direction along the outer edge of the absorber in the width direction, The first side sheet has a skin-side folded-back portion that folds back toward the skin side from a side crease located outside the outer edge of the absorber in the width direction and a non-skin-side folded-back portion that folds back toward the non-skin side from the side crease. The second side sheet has a covering region that covers the non-skin side surface of the non-skin-side folded-back portion. A non-joined region where the non-skin-side folded-back portion and the covering region are not joined extends from the side crease toward the inner side in the width direction. The average coefficient of friction MIU of the skin-side surface of the second side sheet is lower than the average coefficient of friction MIU of the outer surface of the first side sheet.

14. An absorbent article, comprising: A front-back direction, a width direction, and a thickness direction that are orthogonal to each other; A crotch region disposed in the crotch of the wearer, a front side region located on the front side of the crotch region, and a rear side region located on the rear side of the crotch region; An absorber which is disposed at least in the crotch region; And Side sheets which are disposed at least on both sides of the absorber in the width direction, wherein The side sheets have a skin-side region that forms the skin-side surface of the absorbent article at a position outside the outer edge of the absorber in the width direction. An impermeable film layer is provided in the skin-side region.

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