Absorbent article

Abstract

The present invention relates to an absorbent article capable of fitting a surface sheet into a gap of an excretory portion and efficiently bringing a skin care agent contained in the surface sheet into contact with the gap of the excretory portion. 【Solution means】The main body of the absorbent article is divided in the longitudinal direction into an intermediate region including an excretory portion facing region facing the excretory portion of the wearer, a front region in front of the intermediate region in the longitudinal direction, and a rear region behind the intermediate region in the longitudinal direction. The surface sheet contains a skin care agent on the skin-facing surface and is joined to the absorber at least in the intermediate region. The back sheet has a pair of joining regions that are arranged at intervals in the lateral direction and joined to the absorber at least in the intermediate region, and a non-joining region that is arranged between the pair of joining regions and not joined to the absorber. The main body adhesive portion extends in the lateral direction from one joining region through the non-joining region to the other joining region.

Description

Technical Field

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

Background Art

[0002] Absorbent articles such as sanitary napkins generally include a top sheet, a back sheet, and an absorber disposed therebetween, and are worn by attaching a body adhesive portion disposed on the non-skin facing surface of the back sheet to the crotch portion of panties, for example. Since the top sheet comes into contact with the wearer's excretory part, a configuration that can prevent skin troubles such as stuffiness is desirable. From such a viewpoint, Patent Document 1 describes an absorbent article containing a skin care agent at the top of a protruding portion of the top sheet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the top sheet contains a skin care agent, the skin care effect is exhibited by bringing the skin care agent into contact with the excretory part and transferring it. However, when the absorbent article is pressed to the non-skin side by the wearer's left and right labia minora during wearing, the entire absorbent article is pressed to the non-skin side together with the panties, and the central portion in the lateral direction of the top sheet may be less likely to enter the gap between the labia minora of the excretory part. For this reason, there is a demand for an absorbent article that can fit the top sheet into the gap of the excretory part and efficiently bring the skin care agent contained in the top sheet into contact with the gap of the excretory part.

[0005] An object of the present invention relates to an absorbent article that can fit a top sheet into a gap of an excretory part and efficiently bring a skin care agent contained in the top sheet into contact with the gap of the excretory part.

Means for Solving the Problem

[0006] An absorbent article according to one embodiment of the present invention includes a body having a topsheet, a backsheet, an absorber disposed between the topsheet and the backsheet, and a main body adhesive portion disposed on a non-skin facing surface of the backsheet, and has a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction orthogonal to the longitudinal direction and corresponding to the left-right direction of the wearer. The body is divided in the longitudinal direction into an intermediate region including an excretion portion facing region facing the excretion portion of the wearer, a front region in front of the intermediate region in the longitudinal direction, and a rear region behind the intermediate region in the longitudinal direction. The topsheet contains a skin care agent on a skin-facing surface and is joined to the absorber, at least in the intermediate region. The backsheet has a pair of joining regions that are spaced apart from each other in the lateral direction and joined to the absorber, at least in the intermediate region, and a non-joining region that is disposed between the pair of joining regions and not joined to the absorber. The joining region extends in the lateral direction from a boundary portion with the non-joining region to a lateral edge of the absorber. The main body adhesive portion extends in the lateral direction from one of the joining regions through the non-joining region to the other joining region.

Advantages of the Invention

[0007] According to the absorbent article of the present invention, it is possible to fit the topsheet into the gap of the excretion portion and efficiently bring the skin care agent contained in the topsheet into contact with the gap of the excretion portion.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0010] [Overall Configuration of Napkin (Absorbent Article)] An absorbent article 1 according to an embodiment of the present invention is a pad-shaped feminine absorbent article that is fixed to underwear such as shorts and is configured as, for example, a sanitary napkin. The absorbent article 1 will be hereinafter referred to as a napkin 1. As shown in FIG. 1, the napkin 1 includes a main body M and a pair of wing portions W. The napkin 1 has a longitudinal direction X corresponding to the front-back direction of the wearer and a lateral direction Y corresponding to the left-right direction of the wearer and orthogonal to the longitudinal direction X. Further, the napkin 1 has a thickness direction Z orthogonal to both the longitudinal direction X and the lateral direction Y. The napkin 1 is configured to be line-symmetric (left-right symmetric) with respect to a longitudinal center line CL that bisects the napkin 1 in the lateral direction Y.

[0011] In this specification, "inside in the lateral direction Y" means the side approaching the longitudinal center line CL. "Outside in the lateral direction Y" means the side moving away from the longitudinal center line CL. In this specification, "front in the longitudinal direction X" means the front in the longitudinal direction X, that is, the direction toward the ventral side of the wearer. "Rear in the longitudinal direction X" means the rear in the longitudinal direction X, that is, the direction toward the dorsal side of the wearer. In this specification, the skin side means the skin side in the thickness direction Z, that is, the side disposed on the wearer side when the napkin 1 is worn. The non-skin side means the non-skin side in the thickness direction Z, that is, the side disposed on the clothing side when the napkin 1 is worn. In this specification, "plan view" means a plan view seen from the thickness direction Z.

[0012] As shown in FIG. 1, the main body M is divided in the longitudinal direction X into a front region A, an intermediate region B, and a rear region C. In FIG. 1, the intermediate region B includes an excretion part facing region facing the excretion part of the wearer, and is a region between the front and rear base ends of the wing part W. In the present embodiment, the excretion part is the vaginal orifice. The front region A is a region located in front of the intermediate region B (ventral side of the wearer). The rear region C is a region located behind the intermediate region B (dorsal side of the wearer). When the napkin 1 does not have the wing part W, the central region when the main body M is trisected in the longitudinal direction X is defined as the intermediate region B, and the regions before and after it are defined as the front region A and the rear region C, respectively.

[0013] The wing part W extends outward in the lateral direction Y from the main body M in the intermediate region B. The wing part W is folded back and used on the non-skin facing surface side of the crotch part of the shorts.

[0014] As shown in FIG. 2, the napkin 1 includes an absorber 4, a surface sheet 2, and a back sheet 3 in the main body M. In the example shown in FIG. 2, the napkin 1 has a configuration in which the back sheet 3, the absorber 4, and the surface sheet 2 are laminated in this order in the thickness direction Z. These members are appropriately joined by, for example, adhesives, squeezing grooves, heat seals, etc., which will be described later.

[0015] The absorber 4 is disposed between the top sheet 2 and the back sheet 3, and absorbs and holds body fluids such as menstrual blood from the side of the top sheet 2. In the present embodiment, the absorber 4 has a laminated structure of absorbent sheets 40. The detailed configuration of the absorber 4 will be described later.

[0016] The top sheet 2 is disposed on the skin side of the absorber 4 and forms a skin-facing surface 2a. The top sheet 2 is preferably composed of a liquid-permeable sheet material and includes an uneven structure. Note that another sheet material (such as an intermediate sheet) may be disposed between the top sheet 2 and the absorber 4. The detailed configuration of the top sheet 2 will be described later.

[0017] The back sheet 3 is disposed on the non-skin side of the absorber 4 and forms a non-skin-facing surface 3a. From the viewpoint of suppressing leakage of menstrual blood, the back sheet 3 is preferably composed of a sheet material having functions such as liquid impermeability and / or water repellency. Examples of such a sheet material include a film of a thermoplastic resin and a laminated sheet of the film and a nonwoven fabric. Further, from the viewpoint of enhancing wearing comfort, the back sheet 3 preferably has air permeability and / or moisture permeability.

[0018] The napkin 1 further includes a main body adhesive portion 7 disposed on the non-skin-facing surface 3a of the back sheet 3. The main body adhesive portion 7 is configured as, for example, a coated area of an adhesive and is used to fix the napkin 1 to underwear. The napkin 1 may further include a wing adhesive portion 8 disposed on the non-skin-facing surface 3a of the wing portion W in addition to the main body adhesive portion 7 disposed on the main body M.

[0019] In the examples shown in FIGS. 1 and 2, the napkin 1 preferably further includes a pair of side sheets 5 from the viewpoint of enhancing the leak - proof property of the lateral Y - side portion. The pair of side sheets 5 are arranged outside the lateral Y of the surface sheet 2. As the material of the side sheet 5, a sheet material with lower hydrophilicity than the surface sheet 2 is preferable. Specifically, examples include non - woven fabrics, films, and laminated sheets of non - woven fabric and film that have lower hydrophilicity than the surface sheet 2. For example, the side sheet 5 is joined to the surface sheet 2 at the linear joint portion 51. Also, for example, the side sheet 5 is joined to the back sheet 3 at the peripheral edge of the napkin 1. The joining at the joint portion 51 etc. is constituted by known joining means such as adhesives, heat sealing, and ultrasonic sealing.

[0020] In the examples shown in FIGS. 1 and 2, the napkin 1 preferably further includes a main body squeezing groove 6 squeezed in the thickness direction Z from the surface sheet 2. The shape of the main body squeezing groove 6 is arbitrary, and it may be one or, as illustrated in FIG. 1, a plurality of them may be arranged. Note that the napkin 1 may not be provided with any squeezing grooves.

[0021] [Configuration of the surface sheet] As illustrated in FIG. 2, the surface sheet 2 contains a skin care agent 10 on the skin - facing surface 2a and is joined to the absorber 4 at least in the intermediate region B. By joining the surface sheet 2 to the absorber 4 at least in the intermediate region B, the excreted liquid that has passed through the surface sheet 2 can be quickly absorbed by the absorber 4. Note that the surface sheet 2 may be directly or indirectly joined to the absorber 4. For example, it may be joined to the absorber 4 via another sheet material such as an intermediate sheet. When the surface sheet 2 is joined to the absorber 4 via another sheet material, the joining region between the surface sheet 2 and the other sheet material, and the joining region between the other sheet material and the absorber 4 only need to overlap in a plan view at least in the intermediate region B.

[0022] The joining means between the surface sheet 2 and the absorber 4 includes adhesives, fusion by heat or ultrasonic waves, etc. From the viewpoint of increasing the degree of freedom of the coating pattern and ensuring the flexibility, air permeability, liquid permeability, etc. of the joined portion, as shown in FIG. 2, it is preferably the adhesive 11. Hereinafter, the adhesive between the surface sheet 2 and the absorber 4 is referred to as "adhesive 11". The adhesive 11 is an adhesive that can be used for absorbent articles, and is, for example, a hot melt adhesive.

[0023] The adhesive 11 may be applied to the entire skin-facing surface of the absorber 4. Alternatively, it may be intermittently applied so that the coated portions and non-coated portions of the adhesive 11 are mixed. Examples of such an intermittent coating pattern include spiral, summit, omega, curtain, stripe, dot, dashed line, etc. In FIG. 2, for the sake of convenience, it is shown that the adhesive 11 is applied to the entire skin-facing surface of the absorber 4, but actually, it may include non-coated portions.

[0024] The skin care agent 10 is disposed on at least a part of the skin-facing surface 2a in the intermediate region B, and is preferably disposed on the entire intermediate region B. Further, the skin care agent 10 may be disposed not only in the intermediate region B but also on the skin-facing surface 2a in the front region A and the rear region C. Also, from the viewpoint of enhancing the skin care effect, the amount of the skin care agent per unit area of the skin care agent 10 on the skin-facing surface 2a may be partially different. In FIGS. 2 and 4, for the sake of convenience, a mode in which the skin care agent 10 is disposed in a layer on the surface sheet 2 is shown, but actually, the skin care agent 10 may be attached to the fibers of the non-woven fabric constituting the surface sheet 2 or incorporated inside the fibers.

[0025] As the skin care agent 10 used in the present embodiment, those having a skin care effect on the skin of the wearer can be used without particular limitation. Specific examples will be described later.

[0026] On the one hand, when worn, as shown in FIG. 4, the lateral Y-side portions of the main body M are pressed to the non-skin side by the left and right labia H1 in the excretory part H of the wearer. As a result, generally, the entire napkin 1 fixed to the underwear S by the main body adhesive part 7 or the like is likely to be pressed to the non-skin side. On the other hand, in the present embodiment, due to the following configuration, the central portion in the lateral Y direction of the surface sheet 2 in the intermediate region B can easily enter the gap H2 between the labia H1 (the gap in the excretory part H), and the skin care agent 10 can be brought into contact with the gap H2. Hereinafter, a specific configuration capable of realizing the above-described effects will be described.

[0027] [Configuration of the back sheet] As illustrated in FIGS. 2 and 3, the back sheet 3 has a pair of joining regions 31 and a non-joining region 32. The pair of joining regions 31 are respectively arranged at intervals in the lateral Y direction at least in the intermediate region B and are joined to the absorber 4. The pair of joining regions 31 are preferably arranged with the longitudinal center line CL interposed therebetween, and more preferably arranged symmetrically with respect to the longitudinal center line CL. The non-joining region 32 is arranged between the pair of joining regions 31 and is not joined to the absorber 4. In FIG. 3, for the sake of explanation, the joining region 31 is shown in a dot pattern.

[0028] The joining region 31 is a region where joining treatment such as adhesion by an adhesive, heat, or ultrasonic fusion is performed, similar to the surface sheet 2. From the viewpoint of increasing the degree of freedom of the coating pattern and ensuring the flexibility, air permeability, etc. of the joined portion, as shown in FIG. 2, the joining region 31 is preferably joined to the absorber 4 by the adhesive 12. Hereinafter, the adhesive between the joining region 31 and the absorber 4 is referred to as "adhesive 12". The adhesive 12 is an adhesive that can be used for absorbent articles and is, for example, a hot melt adhesive.

[0029] The adhesive 12 may be applied over the entire joining region 31. Alternatively, it may be applied intermittently such that the applied portion and the non-applied portion of the adhesive 12 are mixed. Examples of such an intermittent application pattern include spiral, summit, omega, curtain, stripe, dot, dashed line, and the like. When the adhesive 12 is applied intermittently, the joining region 31 is a region including the non-applied portion obtained by surrounding the outer edge of the applied portion of the adhesive 12. Note that in FIG. 2, for the sake of convenience, the adhesive 12 is shown as being applied over the entire joining region 31, but actually, it may include a non-applied portion.

[0030] Referring to FIG. 3, in the lateral direction Y, the joining region 31 extends from the boundary portion 33 with the non-joining region 32 to the lateral edge 4s of the absorber 4 in the lateral direction Y. Further, with respect to the longitudinal direction X, the joining region 31 may be located at least in a part of the longitudinal direction X of the intermediate region B, but preferably extends over the entire longitudinal direction X of the intermediate region B. Furthermore, it is more preferable that the joining region 31 extends from the intermediate region B to the front region A and the rear region C, and as illustrated in FIG. 3, it is more preferable that it extends over the entire longitudinal direction X of the absorber 4.

[0031] The non-joining region 32 is a region where joining treatment such as by an adhesive, heat, or ultrasonic fusion is not performed. As shown in FIG. 3, the shape of the non-joining region 32 in plan view is, for example, a rectangle long in the longitudinal direction X, but is not limited thereto. For example, the boundary portion 33 between the non-joining region 32 and the joining region 31 may be a straight line parallel to the longitudinal direction X, a curved line, or may be oblique or meandering. With respect to the lateral direction Y, the non-joining region 32 may be located at the center in the lateral direction Y of the intermediate region B, but may extend over the entire center in the lateral direction Y or may extend outside the center in the lateral direction Y. Also, the length of the non-joining region 32 in the longitudinal direction X is configured to be equal to the length of the joining region 31 in the longitudinal direction X.

[0032] [Configuration of the main body adhesive portion] As shown in FIG. 3, the main body adhesive portion 7 extends in the lateral direction Y of the intermediate region B from one joining region 31 through the non-joining region 32 to the other joining region 31. Note that the main body adhesive portion 7 only needs to be disposed in at least the region where the joining region 31 and the non-joining region 32 of the intermediate region B exist, but it is preferably disposed throughout the entire longitudinal direction X of the intermediate region B. Further, it is more preferable that the main body adhesive portion 7 extends from the intermediate region B to the front region A and the rear region C.

[0033] In the present embodiment, the main body adhesive portion 7 has a plurality of strip-shaped adhesive portions 71 that extend along the lateral direction Y and are disposed via a gap portion 72 (see FIG. 6) in the longitudinal direction X. That is, each strip-shaped adhesive portion 71 located in the intermediate region B extends from one joining region 31 through the non-joining region 32 to the other joining region 31 in the lateral direction Y. In other words, the end portions 71a of each strip-shaped adhesive portion 71 in the lateral direction Y are all located in the joining region 31. In the example shown in FIG. 3, the strip-shaped adhesive portion 71 is configured in a rectangular shape that is long in the lateral direction Y.

[0034] [Operation and Effect of the Present Embodiment] The operation and effect of the napkin 1 (absorbent article) of the present embodiment will be described with reference to the schematic diagram of the intermediate region B during wearing in FIG. 4. During wearing, each component can be in contact with each other in the thickness direction Z, but in FIG. 4, for the convenience of explanation, they are shown separated. Further, the shorts S in the following description indicate the crotch portion of the shorts.

[0035] As shown in FIG. 4, during wearing, the lateral Y-side portions of the intermediate region B are pressed against the non-skin side by the left and right labia H1 at the excretion portion H of the wearer (see arrow F1). As a result, the lateral Y-side portions of the intermediate region B are pressed against the non-skin side (see arrow F2). Here, the back sheet 3 in the intermediate region B is fixed to the shorts S from one joining region 31 through the non-joining region 32 to the other joining region 31 by the main body adhesive portion 7 (strip-shaped adhesive portion 71). As a result, the shorts S are pressed against the non-skin side by the left and right joining regions 31, and the non-joining region 32 is also pressed against the non-skin side by the pressed shorts S (see arrow F3).

[0036] On the other hand, in the present embodiment, since the back sheet 3 has the non-bonding region 32, the central portion of the absorber 4 in the lateral direction Y can be separated from the non-bonding region 32 in the thickness direction Z without being fixed to the non-bonding region 32. Therefore, the central portion of the absorber 4 in the lateral direction Y is less likely to receive the pressing force F3 from the back sheet 3 toward the non-skin side. Accordingly, the central portion of the absorber 4 in the lateral direction Y and the surface sheet 2 (the region surrounded by the broken line) joined thereto can bulge relatively toward the skin side with respect to the lateral Y-side portions that can move toward the non-skin side by the pressing force F1 (see arrow F4), and can easily fit into the gap H2 between the left and right labia H1. As a result, the skin care agent 10 contained in the skin-facing surface 2a of the surface sheet 2 can easily come into contact with the gap H2, and the skin care effect on the excretory portion H can be enhanced.

[0037] [Configuration example of the recessed portion] On the other hand, when the wearer's left and right thighs suddenly close or strongly close during exercise or the like, a strong external force in the direction toward the inner side in the lateral direction Y is further applied to the intermediate region B of the shorts S and the napkin 1. In this case, there is a concern that the shorts S may be bent by the external force, and the central portion of the shorts S in the lateral direction Y and the non-bonding region 32 of the back sheet 3 may be more likely to be deformed toward the non-skin side. In contrast, in the present embodiment, the following recessed portion 34 is provided in the back sheet 3, and the bending of the shorts S can be suppressed.

[0038] Specifically, as illustrated in FIGS. 3 and 5, the back sheet 3 is preferably further provided with a recessed portion 34 formed on the non-skin facing surface 3a and recessed toward the skin side. The recessed portion 34 is disposed at a position overlapping the main body adhesive portion 7 in a plan view in the bonding region 31 of the intermediate region B, and extends in the longitudinal direction X. The recessed portion 34 is not limited to a mode parallel to the longitudinal direction X, and may be oblique or meandering. Further, the recessed portion 34 may be disposed at a position overlapping at least the strip-shaped adhesive portion 71 in a plan view.

[0039] Furthermore, the main body adhesive part 7 (band-shaped adhesive part 71) on the recessed part 34 is preferably formed in a concave shape along the recessed part 34 as illustrated in FIG. 5. As a method for forming such a configuration, for example, the recessed part 34 may be formed only on the back sheet 3 and then the main body adhesive part 7 may be formed, or recesses may be formed on both the back sheet 3 and the main body adhesive part 7. Examples of the method of forming the recessed part 34 only on the back sheet 3 include a method of forming unevenness on the back sheet 3 itself by pressing or the like. Alternatively, a recess may be formed in the absorber 4 by pressing, slitting, or the like, and the back sheet 3 at a position corresponding to the recess may be formed with the recessed part 34 by laminating or pressing the absorber 4 and the back sheet 3. Further, as a method of forming recesses on both the back sheet 3 and the main body adhesive part 7, after the main body adhesive part 7 is formed on the back sheet 3, a method of forming the recessed part 34 on the back sheet 3 and the main body adhesive part 7 by pressing or the like may be mentioned.

[0040] In the above configuration, when worn, as shown in FIG. 5, the fabric of the shorts S can enter and be fixed in the recessed part 34. As a result, the fabric of the shorts S is pulled in the lateral direction Y by the amount that has entered the recessed part 34, and an appropriate tension can be generated laterally outward in the Y direction also in the fabric of the shorts S facing the non-bonding region 32. Therefore, even when a strong external force is applied from the thigh or the like of the wearer, deformation such as deflection of the non-skin side of the shorts S facing the non-bonding region 32 is suppressed, and accordingly, deformation such that the non-bonding region 32 deflects to the non-skin side is suppressed. As a result, even in the presence of an external force inward in the lateral direction Y, the central part in the lateral direction Y of the absorber 4 and the surface sheet 2 joined thereto are less likely to deform to the non-skin side, and the surface sheet 2 can fit into the gap of the excretion part.

[0041] Furthermore, since the recessed portion 34 extends long in the vertical direction X, the fabric of the shorts S is fixed long in the vertical direction X, and the effect of suppressing the deformation of the non-bonding region 32 can be further enhanced. For example, as shown in the enlarged view of FIG. 6, when the main body adhesive portion 7 has a plurality of strip-shaped adhesive portions 71, the recessed portion 34 preferably extends continuously in the vertical direction X so as to overlap at least two of the plurality of strip-shaped adhesive portions 71 and at least one gap portion 72 in plan view. That is, the recessed portion 34 may extend continuously through the gap portion 72 to the strip-shaped adhesive portions 71 on both sides in the vertical direction X thereof, or may further extend continuously to the strip-shaped adhesive portions 71 and / or the gap portion 72 located outside the vertical direction X thereof. In this configuration, the end portion 34a of the recessed portion 34 in the vertical direction X may be disposed on the strip-shaped adhesive portion 71, or may be disposed on the gap portion 72 located outside the vertical direction X with respect to the strip-shaped adhesive portion 71 through which the recessed portion 34 passes.

[0042] The recessed portion 34 formed across the plurality of strip-shaped adhesive portions 71 can exert the effect of suppressing the deformation of the shorts S in a wider region in the vertical direction X, and can enhance the effect of suppressing the deformation of the surface sheet 2 and the absorber 4 disposed opposite to the non-bonding region 32 toward the non-skin side. Further, in the above configuration, the region on the strip-shaped adhesive portion 71 of the shorts S enters and is fixed in the recessed portion 34, while the region on the gap portion 72 of the shorts S is not fixed in the recessed portion 34, and a local margin in the lateral direction Y is generated in the fabric of the shorts S. Therefore, when an external force is received from the wearer, the fabric of the shorts S on the gap portion 72 can expand and contract according to the external force, exerting a buffering action on the external force and stably exerting the effect of suppressing the deformation of the non-bonding region 32. As a result, in the above configuration, the deformation of the central portion of the absorber 4 in the lateral direction Y and the non-skin side of the surface sheet 2 joined thereto can be suppressed, and the fitting property and the skin care effect of the surface sheet 2 into the gap of the excretion portion can be sufficiently exerted.

[0043] Furthermore, as illustrated in FIG. 3, the back sheet 3 preferably has a plurality of recessed portions 34. Also, from the viewpoint of effectively exerting the deformation suppressing effect of the non-bonding region 32 when an external force is applied from the lateral direction Y, it is preferable that the recessed portions 34 are respectively arranged in a pair of bonding regions 31. Thereby, tension can be applied to the shorts S at the center in the lateral direction Y from both the left and right sides, and the deformation suppressing effect on the non-skin side of the non-bonding region 32 can be further enhanced. Therefore, with the above configuration, the fitting property and the skin care effect by the above-described front sheet 2 can be further exerted.

[0044] Furthermore, it is more preferable that a plurality of recessed portions 34 are arranged in each of the bonding regions 31, 31. The number of the recessed portions 34 in each of the bonding regions 31, 31 is not particularly limited, but from the viewpoint of effectively exerting the deformation suppressing effect of the non-bonding region 32, it is preferably 2 or more, more preferably 6 or more, and from the viewpoint of suppressing a decrease in the rigidity of the bonding region 31 due to the recessed portions 34, it is preferably 30 or less, preferably 20 or less.

[0045] As a preferable arrangement of the recessed portions 34, a plurality of recessed portions 34 may be arranged at intervals in the longitudinal direction X and / or the lateral direction Y. The recessed portions 34 adjacent to each other in the longitudinal direction X and / or the lateral direction Y may be aligned or may be arranged offset. As illustrated in FIG. 3, by arranging the recessed portions 34 adjacent to each other in the lateral direction Y offset in the longitudinal direction X, tension can be exerted dispersively over a wide area of the fabric of the shorts S, and the bending of the fabric of the shorts S due to local tension and the resulting undesirable deformation of the non-bonding region 32 can be suppressed. In the example of FIG. 3, two vertical rows of recessed portions 34 spaced apart in the lateral direction Y are arranged in each of the bonding regions 31, and the recessed portions 34 in adjacent rows are arranged offset in the longitudinal direction X.

[0046] [Configuration Example of Absorbent Body] As illustrated in FIGS. 2 and 7, in the present embodiment, the absorber 4 is preferably disposed in the intermediate region B and has a high basis weight portion 41 disposed in the intermediate region B and having a relatively high basis weight, and a low basis weight portion 42 disposed around the high basis weight portion 41 and having a relatively low basis weight. In this case, as illustrated in FIG. 7, the high basis weight portion 41 preferably extends over the entire width of the non-bonding region 32 in the lateral direction Y. Note that the “entire width of the non-bonding region 32” means the entire width of the non-bonding region 32 in the lateral direction Y from one boundary portion 33 to the other boundary portion 33.

[0047] With the above configuration, the high basis weight portion 41 having relatively high rigidity is disposed to face the non-bonding region 32. Therefore, even when an external force in the lateral direction Y is received from the wearer's thigh, the high basis weight portion 41 and the surface sheet 2 joined thereto are more likely to resist the pressing force toward the non-skin side in the back sheet 3, and the state of fitting into the gap of the excretory portion can be maintained. Further, since the thickness of the portion of the absorber 4 facing the gap of the excretory portion is increased by the high basis weight portion 41, the fitting property into the gap can be enhanced.

[0048] Furthermore, from the viewpoint of promoting preferable deformation toward the skin side, the absorber 4 preferably has a slit portion 43 disposed at least in the high basis weight portion 41 and extending in the longitudinal direction X. In this configuration, the slit portion 43 preferably overlaps the non-bonding region 32 in a plan view.

[0049] The slit portion 43 is a cut formed in the thickness direction Z of the absorber 4. The slit portion 43 preferably penetrates the absorber 4 as shown in FIG. 2. On the other hand, the slit portion 43 is not formed in the surface sheet 2 and the back sheet 3 other than the absorber 4.

[0050] Note that the statement that the slit portion 43 "extends along the longitudinal direction X" is not limited to the mode of extending parallel to the longitudinal direction X, but broadly includes the mode of linearly extending in the longitudinal direction X as a whole. The slit portion 43 may be linear, or a part thereof may be bent and / or meandering. Further, the slit portion 43 disposed in the high flatness portion 41 may overlap at least a part of the non-bonding region 32 in plan view, but it is more preferable that the whole overlaps.

[0051] In the above configuration, when the napkin 1 receives an external force in the lateral direction Y from the wearer's thigh or the like, the slit portion 43 serves as a starting point of deformation, and can promote the deformation of the high flatness portion 41 and the surface sheet 2 joined thereto. Further, as described above, the absorber 4 and the surface sheet 2 facing the non-bonding region 32 are likely to bulge toward the skin side away from the non-bonding region 32 during wearing. For this reason, the slit portion 43 can promote the deformation such that the high flatness portion 41 and the surface sheet 2 joined thereto are bent toward the skin side. Therefore, with the above configuration, the fitness of the surface sheet 2 to the gap of the excretory portion can be improved, and the skin care effect by the skin care agent can be enhanced.

[0052] From the viewpoint of obtaining the above-described effects more effectively, it is preferable that the absorber 4 has a plurality of slit portions 43 disposed in the high flatness portion 41. For example, it is preferable that these plurality of slit portions 43 are arranged at intervals in the longitudinal direction X and / or the lateral direction Y. In the example shown in FIG. 7, the absorber 4 has a slit row L composed of a plurality of slit portions 43 arranged at intervals along the longitudinal direction X. The slit rows L are arranged in a plurality at intervals in the lateral direction Y, for example. Note that the slit portion 43 may be disposed not only in the high flatness portion 41 but also in the low flatness portion 42.

[0053] The slit portions 43 belonging to each slit row L are preferably aligned along the vertical direction X. Further, the slit portions 43 belonging to the slit rows L adjacent to each other in the horizontal direction Y may have the same position or may be offset in the vertical direction X. In the example shown in FIG. 7, for example, the slit portions 43 belonging to the slit rows L adjacent to each other in the horizontal direction Y are arranged offset in the vertical direction X.

[0054] From the viewpoint of forming effective slit portions 43 in the absorber 4, the absorber 4 preferably has a laminated structure including a plurality of absorbent sheets 40 (see FIG. 2). The absorbent sheet 40 is configured, for example, as a sheet material in which a water-absorbing polymer is sandwiched and fixed between two sheet-like fiber layers made of hydrophilic fibers. Note that all of the absorbent sheets 40 constituting the absorber 4 preferably contain a water-absorbing polymer, but may include an absorbent sheet that does not contain a water-absorbing polymer in part.

[0055] In the absorber 4 having the above configuration, the high basis weight portion 41 can be a region where the number of laminated absorbent sheets 40 is larger than that of the low basis weight portion 42. In order to realize such a configuration, in the present embodiment, it is preferable that the plurality of absorbent sheets 40 include one or more main body absorbent sheets 40a and one or more central absorbent sheets 40b (see FIG. 2).

[0056] The main body absorbent sheet 40a has the same planar shape as the absorber 4. The main body absorbent sheet 40a may be formed, for example, of a sheet material having the same planar shape as the absorber 4 or a laminate thereof, or may be formed by folding a large-sized sheet material into the planar shape. In the example shown in FIG. 2, the main body absorbent sheet 40a is formed by stacking a plurality of (for example, two) sheet materials in the thickness direction Z.

[0057] The central absorbent sheet 40b has the same planar shape as the high basis weight portion 41 and is disposed in the formation region of the high basis weight portion 41 in plan view. The central absorbent sheet 40b may be formed of, for example, a sheet material having the same outer shape as the high basis weight portion 41 or a laminate thereof, or may be formed by folding a large-sized sheet material into the shape. With this configuration, the number of layers of the high basis weight portion 41 can be increased by the amount corresponding to the central absorbent sheet 40b. The central absorbent sheet 40b may be disposed between a plurality of layers of the main body absorbent sheet 40a as shown in FIG. 2, or may be disposed on the skin side or the non-skin side of the main body absorbent sheet 40a.

[0058] In this way, by forming the absorber 4 having the high basis weight portion 41 and the low basis weight portion 42 with the laminated structure of the absorbent sheet 40, the slit portion 43 can be formed as a cut of the absorbent sheet 40, and the deformation action by the slit portion 43 can be surely exhibited. Further, with this configuration, the absorber 4 can be configured to be thin, and the absorber 4 and the surface sheet 2 can be easily inserted into the gap of the excretion portion.

[0059] [Configuration Examples of Depressed Portions and High Basis Weight Portions, etc.] Furthermore, from the viewpoint of more surely exhibiting the deformation suppressing effect of the non-bonding region 32 by the depressed portion 34, the positional relationship among the high basis weight portion 41, the bonding region 31, the non-bonding region 32, and the depressed portion 34 is preferably configured as follows. That is, referring to FIG. 3, the side edge 41s in the lateral direction Y of the high basis weight portion 41 is disposed in the vicinity of the non-bonding region 32 so as to overlap the bonding region 31 in plan view, and the depressed portion 34 is preferably disposed so as to overlap the high basis weight portion 41 in plan view in the bonding region 31 of the intermediate region B. Note that the "vicinity of the non-bonding region 32" is a region within 10 mm outward in the lateral direction Y from the boundary portion 33 between the bonding region 31 and the non-bonding region 32.

[0060] In the above configuration, the portion including the side edge 41s of the high-thickness portion 41 with high rigidity is disposed in the vicinity of the non-bonding region 32 while overlapping the bonding region 31 in plan view. At least one recessed portion 34 overlaps with the high-thickness portion 41 in plan view and is disposed in the vicinity of the non-bonding region 32, so that the fabric of the shorts S is firmly fixed to the bonding region 31 near the boundary portion 33. Thereby, the tension in the lateral direction Y can be more reliably applied to the fabric of the shorts S facing the non-bonding region 32, and the surface sheet 2 and the absorber 4 disposed opposite to the non-bonding region 32 can be more reliably suppressed from deforming to the non-skin side. Therefore, the high-thickness portion 41 facing the non-bonding region 32 and the surface sheet 2 joined thereto are more likely to fit into the gap of the excretion portion without deforming to the non-skin side, and the skin care effect can be further enhanced.

[0061] The recessed portion 34 disposed so as to overlap with the high-thickness portion 41 and the bonding region 31 in plan view may be at least one, but from the viewpoint of stably applying tension to the shorts S from the left and right of the non-bonding region 32, it is preferably disposed in each of the pair of bonding regions 31. Further, from the viewpoint of reliably applying tension to the shorts S from the left and right of the non-bonding region 32, it is more preferable that a plurality of recessed portions 34 are arranged in each bonding region 31.

[0062] [Configuration Example of Surface Sheet] As illustrated in FIGS. 8 and 9, the surface sheet 2 preferably includes a plurality of convex portions 21 protruding toward the skin side and a plurality of concave portions 22 protruding toward the non-skin side. In the forms shown in FIGS. 8 and 9, the convex portion viewed from the skin-facing surface 2a side is the convex portion 21, and the concave portion is the concave portion 22. Conversely, the convex portion viewed from the non-skin-facing surface side is the concave portion 22, and the concave portion is the convex portion 21. Therefore, the convex portion 21 and the concave portion 22 share a part.

[0063] For example, the convex portion 21 includes a top portion 21a located on the skin side and a wall portion 21b that annularly surrounds the periphery of the top portion 21a. The concave portion 22 includes a bottom portion 22a located on the non-skin side and a wall portion 22b that annularly surrounds the periphery of the bottom portion 22a. In the convex portion 21, the top portion 21a is the portion closest to the skin side when the surface sheet 2 is divided into three equal parts in the thickness direction Z without applying a load in a side view as shown in FIG. 9. Similarly, in the concave portion 22, the bottom portion 22a is the portion closest to the non-skin side when the surface sheet 2 is divided into three equal parts in the thickness direction Z without applying a load in a side view as shown in FIG. 9.

[0064] The protruding shape of the convex portion 21 and the concave portion 22 in the thickness direction Z is not particularly limited, and may be a cone or a frustum of a cone having a rounded top as shown in the figure, or a pyramid, a frustum of a pyramid, an oblique cone, etc. Further, the "annular" in the wall portions 21b and 22b is not particularly limited as long as it forms an endless series of shapes in a plan view of the surface sheet 2, and may be any shape such as a circle, an ellipse, a rectangle, a polygon, etc. in a plan view of the surface sheet 2. Note that the wall portion 21b of the convex portion 21 and the wall portion 22b of the concave portion 22 share a part.

[0065] Referring to FIGS. 1, 2, and 9, in the above configuration, it is preferable that the plurality of convex portions 21 include the skin care agent 10 and are arranged so as to overlap with the non-bonding region 32 in a plan view. That is, the region where the convex portion 21 is formed may be arranged so as to overlap at least a part of the non-bonding region 32, but it is preferable that the region where the convex portion 21 is formed overlaps the entire non-bonding region 32. Further, as illustrated in FIG. 1, it is more preferable that the region where the convex portion 21 is formed is arranged on the entire skin-facing surface 2a of the surface sheet 2 exposed from the side sheet 5.

[0066] Also, as illustrated in FIG. 9, the skin care agent 10 may be included in at least a part of the convex portion 21, but it is preferably included in the top portion 21a in particular. In FIG. 9, the black portion indicates the skin care agent 10 included in the surface sheet 2, and the darkness of the black color schematically indicates the amount per unit area of the skin care agent 10. Also, the illustration of the skin care agent 10 in FIG. 8 is omitted.

[0067] The convex portion 21 contains the skin care agent 10 and is arranged so as to overlap with the non-bonding region 32 in plan view, so that the skin care agent 10 can more easily come into contact with the gap of the excretion part, and the skin care effect can be enhanced.

[0068] As illustrated in FIGS. 8 and 9, in the surface sheet 2, it is preferable that an internal space P is formed on the non-skin side of the convex portion 21. That is, the internal space P is a space surrounded by the wall portion 21b and the top portion 21a of the convex portion 21. With such a configuration, the deformability of the convex portion 21 can be enhanced, and the fitness to the gap of the excretion part can be improved. More specifically, for example, when an external force is received from the wearer's thigh or the like inward in the lateral direction Y, the internal space P allows the convex portion 21 to deform so as to collapse in the lateral direction Y, and it becomes easy to enter the narrow gap of the excretion part. Further, due to the high deformability of the convex portion 21, the surface sheet 2 can be deformed according to the size of the wearer's labia and the size of the gap, and the area of contact with the skin care agent 10 can also be increased.

[0069] In addition, the convex portions 21 and the concave portions 22 are preferably arranged alternately and continuously along two directions intersecting each other in plan view. Here, the two directions preferably intersect at an angle of 30 degrees or more and 90 degrees or less in the X-Y plane. For example, in the napkin 1, one of the two directions is the lateral direction Y, and the other direction is the longitudinal direction X. That is, in the illustrated example, the convex portions 21 and the concave portions 22 are arranged alternately and continuously along the longitudinal direction X and the lateral direction Y.

[0070] From the viewpoint of ensuring liquid permeability while forming the convex portions 21 and concave portions 22 having the above-described configuration, the surface sheet 2 is preferably made of a nonwoven fabric. The nonwoven fabric may be entirely composed of a single type of fiber having the same fineness, or may be composed of a plurality of types of fibers having different finenesses. Further, since it is easy to shape into a preferable shape by heat, the nonwoven fabric is preferably composed of heat-fusible fibers. Examples of the thermoplastic resin constituting the heat-fusible fibers include polyolefin resins such as polypropylene and polyethylene, polyester resins, polyamide resins such as nylon 6 and nylon 66, and polyacrylonitrile resins. Further, the heat-fusible fibers may be fibers composed of one type of resin, or may be composite fibers (for example, core-sheath type fibers, side-by-side type fibers, etc.) composed of two or more types of these resins.

[0071] When the surface sheet 2 is made of a nonwoven fabric, from the viewpoint of forming the surface sheet 2 having high deformability and cushioning properties, it is preferable that the fiber density and fiber spacing in the surface sheet 2 are appropriately set according to the arrangement of the convex portions 21 and the concave portions 22. For example, as shown in the plan view seen from the thickness direction Z of FIG. 10, the concave portion 22 preferably has a fiber portion 22c composed of fibers and a void portion 22d disposed between the fiber portions 22c and composed of voids. In the example shown in FIG. 10, the concave portion 22 has a plurality of void portions 22d partitioned by the fiber portions 22c. The void portion 22d is preferably formed at the bottom portion 22a of the concave portion 22. In the above configuration, the surface sheet 2 is joined to the absorber 4 by the fiber portion 22c.

[0072] In the above configuration, since the recess 22 includes the void portion 22d, it has a larger inter-fiber distance than the convex portion 21. As a result, the fiber density of the recess 22 including the void portion 22d becomes low, and the recess 22 is likely to deform. Therefore, it is possible to promote the deformation of the surface sheet 2 and contribute to the improvement of the fit of the surface sheet 2 to the gap of the discharge portion and the skin care agent effect. In this specification, the inter-fiber distance is the average inter-fiber distance measured by the method described later. As a specific example, the inter-fiber distance in the void portion 22d is preferably 200 μm or more, more preferably 500 μm or more, preferably 2000 μm or less, and more preferably 1000 μm or less. Further, the ratio of the inter-fiber distance at the bottom 22a of the recess 22 to the inter-fiber distance at the top 21a of the convex portion 21 is preferably 5.0 or more, more preferably 13 or more, preferably 50 or less, and more preferably 25 or less.

[0073] The method for measuring the inter-fiber distance will be described. The inter-fiber distance of the nonwoven fabric is obtained by the following formula (1) based on Wrotonowski's assumption. The following formula (1) is generally used when obtaining the inter-fiber distance of a fiber aggregate. Under Wrontnowski's assumption, the fibers are cylindrical, and each fiber is regularly arranged without intersecting. When calculating, the thickness t, basis weight W, resin density ρ of the fiber, and fiber diameter D used in the following formula (1) are the values for each measurement object, respectively. The thickness t, basis weight W, and fiber diameter D are the average values of the measured values at a plurality of measurement points, respectively. Note that the value of the layer thickness TL described later can be used as the thickness t.

Equation

[0074] The fiber diameter D described above is measured as follows. The measurement target (concave and convex portions) of the surface sheet 2 is cut with a razor (for example, a single-edge blade manufactured by Feather Safety Razor Co., Ltd.) to obtain a measurement piece having a rectangular shape (8 mm × 4 mm) in plan view. When cutting the measurement target, care is taken so that the structure of the cut surface of the measurement piece formed by the cutting is not destroyed by the pressure during cutting or the like. As a preferable method for cutting the measurement target, prior to cutting the measurement target, the measurement target is placed in liquid nitrogen and sufficiently frozen, and then cut. The measurement piece is attached to the sample stage using double-sided paper tape (Inner Stack NW-15 manufactured by Nichiban Co., Ltd.). Next, the measurement piece is platinum-coated. For the coating, an ion sputtering apparatus E-1030 type (trade name) manufactured by Hitachi Naka Precision Instruments Co., Ltd. is used, and the sputtering time is 30 seconds. The cut surface of the measurement piece is observed at a magnification of 1000 times using an S-4000 type field emission type operating electron microscope manufactured by Hitachi, Ltd. For each fiber existing in each measurement piece, the length in the width direction with respect to the longitudinal direction of the fiber is measured 10 times, and the average value thereof is taken as the fiber diameter.

[0075] The arrangement of the convex portion 21 and the concave portion 22 in the surface sheet 2 is not particularly limited, and for example, the following arrangements can be adopted. The distance between the top 21a of the convex portion 21 and the bottom 22a of the concave portion 22 at the closest position when the surface sheet 2 is viewed in plan is preferably 1 mm or more, more preferably 3 mm or more, preferably 15 mm or less, and more preferably 10 mm or less. Further, the distance between the tops 21a of the convex portions 21 adjacent to each other in the lateral direction Y in the surface sheet 2 is preferably 2 mm or more, more preferably 3 mm or more, preferably 30 mm or less, and more preferably 15 mm or less. Further, the distance between the tops 21a of the convex portions 21 adjacent to each other in the longitudinal direction X in the surface sheet 2 is preferably 2 mm or more, more preferably 3 mm or more, preferably 30 mm or less, and more preferably 15 mm or less.

[0076] The basis weight of the surface sheet 2 may be appropriately selected according to the application. When used as a surface sheet for absorbent articles such as sanitary products, the average value of the entire sheet is preferably 15 g / m 2 or more, more preferably 20 g / m 2or less, preferably 50 g / m 2 or less, more preferably 40 g / m 2 or less.

[0077] Regarding the thickness of the surface sheet 2, when the surface sheet 2 is viewed from the side as shown in FIG. 9, the overall thickness is defined as the sheet thickness TS, and the local thickness of the surface sheet 2 that is curved due to the unevenness is defined as the layer thickness TL. The sheet thickness TS is preferably 0.5 mm or more, more preferably 0.75 mm or more, preferably 2.5 mm or less, and more preferably 1.5 mm or less. By setting it within this range, the body fluid absorption rate during use can be increased, the liquid return from the absorber 4 can be suppressed, and furthermore, an appropriate cushioning property can be realized while maintaining the thinness of the product.

[0078] The layer thickness TL may vary at each part within the surface sheet 2. It is preferable that the layer thickness TL at the top 21a of the convex portion 21 > the layer thickness TL at the wall portion 21b of the convex portion 21 (the wall portion 22b of the concave portion 22) > the layer thickness TL at the bottom 22a of the concave portion 22 in this order. Thereby, the top 21a of the convex portion 21 can suppress the fiber density to be low and can realize a soft and good skin feel. On the other hand, the wall portion 21b of the convex portion 21 (the wall portion 22b of the concave portion 22) can increase the fiber density and can realize a good cushioning property without losing its shape.

[0079] The sheet thickness TS and the layer thickness TL are measured by the following methods. The measurement method of the sheet thickness TS is to measure using a thickness measuring instrument with a load of 0.05 kPa applied to the surface sheet 2. As the thickness measuring instrument, a laser displacement meter manufactured by Omron Corporation is used. For the thickness measurement, 10 points in the measurement target part are measured, and their average value is calculated as the thickness. The measurement method of the layer thickness TL is to cut the surface sheet 2 along the thickness direction using a Feather razor (product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). Then, the cross-section of the cut sheet is magnified approximately 20 times by a digital microscope VHX-900 manufactured by Keyence Corporation to measure the thickness of each measurement target part.

[0080] [Specific Examples of Skin Care Agents]

[0081] Since the skin care agent used in the present invention has, for example, an action of repairing the skin barrier function, it preferably contains one or more ceramides. As the ceramides, those generally used in the fields of cosmetics and the like can be used. For example, those represented by the general formula (I) described in International Publication No. 2022 / 034915 can be mentioned.

[0082]

Chem.

[0083] 〔In formula (I), R 11 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 4 to 30 carbon atoms, which may be substituted with a hydroxyl group, a carbonyl group or an amino group, or a hydrogen atom; Z represents a methylene group, a methine group or an oxygen atom; X 11 、X 12 and X 13 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group, X 14 represents a hydrogen atom, an acetyl group or a glyceryl group, or forms an oxo group together with an adjacent oxygen atom (however, when Z is a methine group, either one of X 11 and X 12 is a hydrogen atom and the other does not exist. When X 14 forms an oxo group, X 13 does not exist.); R 12 and R 13 each independently represent a hydrogen atom, a hydroxyl group, a hydroxyalkyl group (such as a hydroxymethyl group, a hydroxyethyl group, etc.) or an acetoxymethyl group; R 14represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 60 carbon atoms, which may be substituted with a hydroxyl group, a carbonyl group or an amino group, and may also have an ether bond, an ester bond or an amide bond in the main chain; R 15 represents a hydrogen atom or a linear or branched saturated or unsaturated hydrocarbon group having 1 to 30 carbon atoms, which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group (when R 11 is a hydrogen atom and Z is an oxygen atom, R 15 is preferably a hydrocarbon group having 10 to 30 carbon atoms, which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group. Also, when R 11 is a hydrocarbon group, R 15 is preferably a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group); The dashed line indicates that it may be an unsaturated bond.]]

[0084] In formula (I), as the "linear, branched or cyclic saturated or unsaturated hydrocarbon group having 4 to 30 carbon atoms, which may be substituted with a hydroxyl group, a carbonyl group or an amino group" represented by R 11 , a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 7 to 22 carbon atoms, which may be substituted with a hydroxyl group, is preferred. Z represents a methylene group, a methine group or an oxygen atom.

[0085] X 11 , X 12 and X 13 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group. As the combination of X 11 , X 12 and X 13 , a combination in which 0 to 1 of X 11 , X 12 and X 13 is a hydroxyl group and the remainder are hydrogen atoms is preferred. When Z is a methine group, X11 and X 12 Only one of them is a hydrogen atom, and the other does not exist. Also, X 14 is preferably a hydrogen atom or a glyceryl group. R 12 and R 13 each independently represents a hydrogen atom, a hydroxyl group, a hydroxyalkyl group (such as a hydroxymethyl group, a hydroxyethyl group, etc.) or an acetoxymethyl group, and preferably R 12 is a hydrogen atom or a hydroxymethyl group, and preferably R 13 is a hydrogen atom. R 14 may be substituted with a hydroxyl group, a carbonyl group or an amino group, and also represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 60 carbon atoms which may have an ether bond, an ester bond or an amide bond in the main chain. R 14 is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 35 carbon atoms which may be substituted with a hydroxyl group or an amino group, or a group in which a linear, branched or cyclic saturated or unsaturated fatty acid having 8 to 22 carbon atoms which may be substituted with a hydroxyl group at the ω-position is ester-bonded or amide-bonded to the hydrocarbon group. Preferred fatty acids for bonding are isostearic acid, 12-hydroxystearic acid or linoleic acid.

[0086] R 15 represents a hydrogen atom or a linear or branched saturated or unsaturated hydrocarbon group having 1 to 30 carbon atoms which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group. When R 11 is a hydrogen atom and Z is an oxygen atom, R 15 is preferably a hydrocarbon group having 10 to 30 carbon atoms which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group. Also, when R 11 is a hydrocarbon group, R 15represents a hydrogen atom, or a hydrocarbon group having 1 to 8 carbon atoms which may have a substituent selected from a hydroxyl group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group, preferably a hydrogen atom, or a hydrocarbon group having 1 to 8 carbon atoms which may be substituted by 1 to 3 selected from a hydroxyl group, a hydroxyalkoxy group and an alkoxy group. Here, the hydroxyalkoxy group and the alkoxy group preferably have 1 to 7 carbon atoms.

[0087] For example, as ceramides, natural ceramides represented by the following general formula (II) or synthetic compounds having the same structure and their derivatives (hereinafter also referred to as natural ceramides), or pseudo-ceramides represented by the following general formula (III) (hereinafter also referred to as pseudo-ceramides) are preferred.

[0088]

Chemical formula

[0089] (In formula (II), R 21 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 7 to 19 carbon atoms which may be substituted by a hydroxyl group; Z1 represents a methylene group or a methine group; X 15 X 16 and X 17 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group; X 18 represents a hydrogen atom or forms an oxo group together with the adjacent oxygen atom (however, when Z1 is a methine group, either one of X 15 and X 16 is a hydrogen atom and the other does not exist. When X 18 forms an oxo group, X 17 does not exist.); R 22 represents a hydroxyalkyl group (such as a hydroxymethyl group, a hydroxyethyl group, etc.) or an acetoxymethyl group; R 23represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R 24 is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 30 carbon atoms (the hydrocarbon group is preferably an alkyl group) which may be substituted with a hydroxyl group, or represents a group in which a linear or branched saturated or unsaturated fatty acid having 8 to 22 carbon atoms which may be substituted with a hydroxyl group is ester-bonded to the ω-terminal of the hydrocarbon group (the hydrocarbon group is preferably an alkyl group); The dashed line indicates that an unsaturated bond may be present.]]

[0090] [Chemical formula]

[0091] [In formula (III), R 25 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms which may be substituted with a hydroxyl group, or a hydrogen atom; X 19 represents a hydrogen atom, an acetyl group or a glyceryl group; R 26 is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 22 carbon atoms (the hydrocarbon group is preferably an alkyl group) which may be substituted with a hydroxyl group or an amino group, or represents a group in which a linear or branched saturated or unsaturated fatty acid having 8 to 22 carbon atoms which may be substituted with a hydroxyl group is ester-bonded to the ω-terminal of the hydrocarbon group (the hydrocarbon group is preferably an alkyl group); R 27 represents a hydrogen atom or a hydrocarbon group having a total of 1 to 30 carbon atoms (the hydrocarbon group is preferably an alkyl group) which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group.]]

[0092] Here, the natural-type ceramide represented by general formula (II) will be described. In formula (II), R 21The number of carbon atoms of the hydrocarbon group represented by is 7 to 19, preferably 11 to 15, more preferably 13 to 15. Also, R 21 The hydrocarbon group represented by is preferably a linear alkyl group. X 18 represents a hydrogen atom or forms an oxo group together with an adjacent oxygen atom. Also, R 24 is preferably a linear alkyl group having 9 to 27 carbon atoms which may be substituted with a hydroxyl group, or a group in which linoleic acid is ester-bonded to the ω-terminus of the alkyl group. R 24 is more preferably a tricosyl group, 1-hydroxypentadecyl group, 1-hydroxytricosyl group, heptadecyl group, 1-hydroxyundecyl group, nonacosyl group in which linoleic acid is ester-bonded at the ω-position, pentacosyl group.

[0093] Specific examples of natural ceramides include ceramides Type 1 to 7 in which sphingosine, dihydrosphingosine, phytosphingosine or sphingadienine is amidated (for example, the porcine and human ceramides described in Figure 2 of J. Lipid Res., 24:759 (1983) and Figure 4 of J. Lipid. Res., 35:2069 (1994)). Furthermore, these N-alkyl forms (for example, N-methyl form) are also included in natural ceramides. These ceramides may be used in the form of optically active forms of the natural type (D(-) form), optically active forms of the non-natural type (L(+) form), or further mixtures of the natural type and the non-natural type. The relative configuration of the above compounds may be that of the natural configuration, that of other non-natural configurations, or those based on mixtures thereof. Specifically, ceramide EOP, ceramide AP (hydroxystearyl phytosphingosine), ceramide NP (N-stearoyl phytosphingosine), etc. may be mentioned. Examples of commercially available such natural ceramides include, for example, Ceramide I as ceramide EOP, Ceramide III, Ceramide IIIB and Ceramide VI MB (all manufactured by EVONIK) as ceramide NP; Liquid Crysta Ceramide 2, Liquide Crysta Ceramide 25 (both manufactured by Takasago Aroma Co., Ltd.); Ceramide 2 (manufactured by Sederma); DS-CERAMIDE Y3S, DS-CERAMIDE Y3O, DS-HydroCeramide 50S (all manufactured by DOOSAN) as ceramide NP.

[0094] Next, pseudo-ceramides represented by the general formula (III) will be described. In the formula (III), R 26 Examples thereof include a heptyl group, a 1-hydroxyheptyl group, a nonyl group, a tridecyl group, a pentadecyl group, an undecyl group in which linoleic acid is ester-bonded at the ω-position, a pentadecyl group in which linoleic acid is ester-bonded at the ω-position, a pentadecyl group in which 12-hydroxystearic acid is ester-bonded at the ω-position, and an undecyl group in which methyl-branched isostearic acid is amide-bonded at the ω-position. Further, when R 25 is a hydrogen atom, R27 is preferably a hydrocarbon group having 1 to 30 carbon atoms (preferably an alkyl group) which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group, more preferably a hydrocarbon group having 10 to 30 carbon atoms (preferably an alkyl group) which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group, and particularly preferably an alkyl group having 12 to 20 carbon atoms. R 25 When R is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms which may be substituted with a hydroxyl group, R 27 is preferably a hydrogen atom or an alkyl group having 1 to 8 carbon atoms which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group. R 27 The hydroxyalkoxy group or alkoxy group in R is preferably one having 1 to 7 carbon atoms.

[0095] Next, pseudo ceramides represented by the general formula (III) will be described. In the formula (III), R 26 is preferably a heptyl group, a 1-hydroxyheptyl group, a nonyl group, a tridecyl group, a pentadecyl group, an undecyl group having linoleic acid ester-bonded at the ω-position, a pentadecyl group having linoleic acid ester-bonded at the ω-position, a pentadecyl group having 12-hydroxystearic acid ester-bonded at the ω-position, or an undecyl group having methyl-branched isostearic acid amide-bonded at the ω-position. Also, when R 25 is a hydrogen atom, R 27 is preferably a hydrocarbon group having 1 to 30 carbon atoms (preferably an alkyl group) which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group, more preferably a hydrocarbon group having 10 to 30 carbon atoms (preferably an alkyl group) which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group, and particularly preferably an alkyl group having 12 to 20 carbon atoms. R 25When it is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms which may be substituted with a hydroxyl group, R 27 is preferably a hydrogen atom or an alkyl group having 1 to 8 carbon atoms which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group. R 27 The hydroxyalkoxy group or alkoxy group in is preferably one having 1 to 7 carbon atoms. Among the pseudo ceramides, R in the general formula (III) 25 is a hexadecyl group, X19 is a hydrogen atom, R 26 is a pentadecyl group, R 27 is a hydroxyethyl group; R in the general formula (III) 25 is a hexadecyl group, X19 is a hydrogen atom, R 26 is a nonyl group, R 27 is a hydroxyethyl group; R in the general formula (III) 25 is a hexadecyl group, X19 is a glyceryl group, R 26 is a tridecyl group, R 27 is a 3-methoxypropyl group; R in the general formula (III) 25 is a hydrogen atom, X19 is a hydrogen atom, R 26 is a pentadecyl group, R 27 is a dodecyl group; R in the general formula (III) 25 is a hydrogen atom, X19 is a hydrogen atom, R 26 is a 1-hydroxyheptyl group, R 27 is a dodecyl group are preferred. R in the general formula (III) 25 is a hexadecyl group, X19 is a hydrogen atom, R 26 is a pentadecyl group, R 27 is a hydroxyethyl group; R in the general formula (III) 25 is a hexadecyl group, X19 is a hydrogen atom, R 26 is a nonyl group, R 27 is a hydroxyethyl group; R in the general formula (III) 25 is a hexadecyl group, X19 is a glyceryl group, R 26 is a tridecyl group, R 27Those in which it is a 3-methoxypropyl group are more preferred. R in the general formula (III) 25 is a hexadecyl group, X19 is a hydrogen atom, R 26 is a pentadecyl group, R 27 is a hydroxyethyl group (N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide) is particularly preferred. The structural formulas of particularly preferred ones among the pseudo-ceramides represented by the general formula (III) are shown below.

[0096]

Chemical formula

[0097]

Chemical formula

[0098] As another example of the skin care agent used in the present invention, there is a diamide derivative represented by the following formula (IV) described in Patent Document 1.

[0099]

Chemical formula

[0100] The diamide derivative represented by the general formula (IV) is the diamide derivative of the invention described in International Publication WO00 / 61097, and has a drug effect of improving the water retention ability and barrier function of the stratum corneum. When the diamide derivative held in the convex portion 21 comes into contact with the skin of the wearer during the wearing of the absorbent article, it functions as an oily skin care agent and can suppress and / or improve skin swelling. When using the above diamide derivative, only one kind of the diamide derivative to be used may be used, or two or more kinds may be used in combination.

[0101] In addition, as other skin care agents that can be used in the present invention, for example, oily skin care agents used as emollient agents in the field of cosmetics can be used. Specific examples of such other skin care agents include liquid paraffin, silicone oil, animal and vegetable oils (such as olive oil, jojoba oil, safflower oil, argan oil, squalane and squalene, etc.), various plant extracts (such as peach leaf extract, ginger extract, chestnut extract, hibiscus extract, eucalyptus extract, Roman chamomile extract, carrot extract, bellflower extract, oats extract, licorice leaf extract, licorice leaf extract, ginseng extract, spinach extract, Chinese knotweed extract, honeysuckle extract, yokukinin extract, etc.), chamomile ET, centella extract, allantoin, dipotassium glycyrrhizinate, stearyl glycyrrhetinate, niacinamide, vitamin E, monoglyceride, diglyceride, triglyceride, aliphatic ether (such as myristyl-1,3-dimethylbutyl ether, palmityl-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol ester, paraffin wax, C12-C22 fatty acids, C12-C44 fatty acid ethers, C12-C22 fatty alcohols, petrolatum, fatty acid sorbitan esters (any of monoester, diester, and triester may be used.), polyoxyethylene fatty acid sorbitan esters (including monoester, diester, and triester), metal stearates (such as magnesium stearate, etc.), sucrose fatty acid esters, cyclodextrin fatty acid esters, silicone, silicone-based resins, other emollient agents, and lotion compositions containing an emollient agent and an immobilizing agent, etc. Various skin care agents may be used alone or in combination of two or more kinds.

[0102] From the viewpoint of not reducing the permeability of the body fluid excreted on the surface sheet 2, a mixture of a C12-C22 fatty alcohol (preferably stearyl alcohol) and the diamide derivative of the general formula (IV) can be preferably used. The mixing ratio of stearyl alcohol to the diamide derivative of the general formula (IV) (stearyl alcohol / diamide derivative) is preferably 90 / 10 to 50 / 50 (mass%) from the viewpoints of the transferability of the skin care agent to the skin, the skin care effect, the feel during use, and the permeability of the body fluid to the surface sheet. These mixtures are preferably applied to the nonwoven fabric of the surface sheet 2 after heating to increase their fluidity. After adhering to the nonwoven fabric, by leaving it at room temperature, the fluidity is reduced to make it easier to be retained on the surface sheet 2.

[0103] [Arrangement example of skin care agent] As illustrated in FIG. 9, the skin care agent 10 is preferably contained in the top portion 21a at the convex portion 21, and more preferably contained in both the top portion 21a and the wall portion 21b. In this case, from the viewpoint of bringing the skin care agent 10 into contact with the skin more easily, in the convex portion 21, it is preferable that the amount of the skin care agent per unit area is less in the wall portion 21b than in the top portion 21a. The amount of the skin care agent is to be compared on the skin-facing surface. The skin care agent 10 may also be contained in the concave portion 22.

[0104] From the viewpoint of easily realizing the above-described distribution, examples of the application method of the skin care agent 10 include a method of spraying the skin care agent with enhanced fluidity as a heat or solution from the skin-facing surface side of the nonwoven fabric having the uneven structure. The application method of the skin care agent is not limited to this, and it may be a die coater method, a slot spray method, a curtain spray method, a melt blown method, a spiral spray method, a gravure method, a bead method, or the like.

[0105] A method for measuring the skin care agent amount will be described. The measurement target site of the surface sheet is cut with scissors to obtain a measurement piece having a predetermined area (for example, 1 to 2 mm square). Then, for each measurement piece, the ratio of the absorption peak area derived from the skin care agent to the absorption peak area derived from the surface sheet of the infrared absorption peak obtained by, for example, infrared spectroscopy (FT-IR) is calculated, and this ratio is used as an index of the skin care agent amount to compare the skin care agent amounts. Note that the larger the ratio, the larger the skin care agent amount. For infrared spectroscopy, for example, the ATR method can be used. As a specific example, when a diamide derivative described later is applied to a surface sheet made of PET / PE, for each measurement piece, the absorption peak of the amide group derived from the skin care agent at 1600 - 1670 cm -1 is calculated with respect to the C-H absorption peak derived from the surface sheet at 1400 - 1500 cm -1 . By comparing this ratio in measurement pieces of the same area, the skin care agent amount per unit area at each measurement target site can be compared.

[0106] [Examples of the dimensions of the absorber] The thickness of the high-flat amount portion 41 of the absorber 4 is preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, from the viewpoint of ensuring absorbency and ensuring the fit to the gap of the excretion portion while ensuring absorbency. Note that the thickness of the high-flat amount portion 41 can be measured in the same manner as the sheet thickness TS of the surface sheet 2.

[0107] [Examples of the dimensions of the non-bonding region] The dimension of the non-bonding region 32 in the transverse direction Y is preferably 5 mm or more, more preferably 10 mm or more, from the viewpoint of promoting the separation between the absorber 4 and the non-bonding region 32, and is preferably 40 mm or less, more preferably 25 mm or less, from the viewpoint of ensuring the bonding between the absorber 4 and the back sheet 3. Note that the dimension of the non-bonding region 32 in the longitudinal direction X is preferably equal to or greater than the length of the intermediate region B in the longitudinal direction X, and more preferably equal to the length of the absorber 4 in the longitudinal direction X, as described above. Note that the dimension and the dimensions of each part described below are average dimensions of five or more points spaced substantially evenly within the measurement target.

[0108] [Example of dimensions of strip-shaped adhesive parts] When the main body adhesive part 7 has a plurality of strip-shaped adhesive parts 71 extending in the transverse direction Y, the dimensions of each strip-shaped adhesive part 71 are not particularly limited, but may be, for example, the following dimensions. The dimension of each strip-shaped adhesive part 71 in the longitudinal direction X is preferably 1 mm or more, more preferably 2 mm or more, and preferably 8 mm or less, more preferably 6 mm or less, from the viewpoint of suppressing defects such as adhesion within the strip-shaped adhesive part 71 while ensuring the adhesiveness of the strip-shaped adhesive part 71. The dimension of the gap part 72 between adjacent strip-shaped adhesive parts 71 in the longitudinal direction X is preferably 1 mm or more, more preferably 2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, from the viewpoint of suppressing defects such as adhesion between adjacent strip-shaped adhesive parts 71 while ensuring the adhesiveness. The dimension of each strip-shaped adhesive part 71 in the transverse direction Y can be appropriately set according to the dimension of the main body M in the transverse direction Y, but is preferably 40 mm or more, more preferably 50 mm or more, and preferably 90 mm or less, more preferably 70 mm or less.

[0109] [Example of dimensions of recessed part] The dimension (width) of each recessed portion 34 in the lateral direction Y is preferably 0.1 mm or more, more preferably 0.3 mm or more, preferably 1.0 mm or less, and more preferably 0.8 mm or less. The width of the recessed portion 34 here is the width in the natural state without applying tension to the absorbent article, such as by attaching it to the shorts S, and is the width that can be visually recognized using a loupe, an optical microscope, etc. from the non-skin facing surface 3a. The dimension of each recessed portion 34 in the longitudinal direction X is preferably 10 mm or more, more preferably 15 mm or more, preferably 35 mm or less, and more preferably 25 mm or less. The interval in the lateral direction Y between the recessed portions 34 adjacent in the lateral direction Y is preferably 3 mm or more, more preferably 7 mm or more, preferably 20 mm or less, and more preferably 15 mm or less.

[0110] [Example of dimensions of slit portion] The dimension (width) of each slit portion 43 in the lateral direction Y is preferably 0.1 mm or more, more preferably 0.3 mm or more, preferably 1.0 mm or less, and more preferably 0.8 mm or less. The width of the slit portion 43 here is the width in the natural state without applying tension to the absorbent article, such as by attaching it to the shorts S. The dimension of each slit portion 43 in the longitudinal direction X is preferably 10 mm or more, more preferably 15 mm or more, preferably 35 mm or less, and more preferably 25 mm or less. The interval in the lateral direction Y between the slit portions 43 adjacent in the lateral direction Y is preferably 3 mm or more, more preferably 7 mm or more, preferably 20 mm or less, and more preferably 15 mm or less.

[0111] [Other embodiments] As described above, the embodiments of the present invention have been explained, but the present invention is not limited only to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[0112] The absorbent article of the present invention is not limited to the structure shown in FIG. 2, and for example, an intermediate sheet may be provided between the surface sheet 2 and the absorber 4.

[0113] For example, the back sheet 3 may not have the recessed portion 34. Also, the configuration of the absorber 4 is not limited to the laminate of the absorbent sheet 40 described in the above embodiment. Further, the configuration of the top sheet 2 is not limited to the example of the embossed nonwoven fabric described in the above embodiment.

[0114] In the above embodiment, an example of a sanitary napkin as an absorbent article was shown, but it is not limited to this as long as it is an absorbent article that is fixed and used for underwear such as shorts. The absorbent article of the present invention may be, for example, a urine collection pad, a diaper sheet, or the like.

Explanation of Reference Numerals

[0115] 1... Napkin (absorbent article) 2... Top sheet 3... Back sheet 31... Bonding region 32... Non-bonding region 33... Boundary portion 4... Absorber 7... Main body adhesive portion 10... Skin care agent A... Front region B... Middle region C... Rear region M... Main body

Claims

1. An absorbent article comprising a main body having a top sheet, a back sheet, an absorbent body disposed between the top sheet and the back sheet, and a main body adhesive portion disposed on a non-skin-facing surface of the back sheet, the absorbent article having a vertical direction corresponding to the front-to-back direction of a wearer, and a horizontal direction perpendicular to the vertical direction and corresponding to the left-to-right direction of the wearer, The main body is divided into a middle region including an excretory part facing region facing the excretory part of the wearer, a front region in front of the middle region in the longitudinal direction, and a rear region in the rear of the middle region in the longitudinal direction, the top sheet contains a skin care agent on the skin-facing surface at least in the intermediate region and is joined to the absorbent body; The back sheet is a pair of joining regions arranged at least in the intermediate region at a distance from each other in the lateral direction and joined to the absorbent body; a non-bonded region disposed between the pair of bonded regions and not bonded to the absorbent body; The bonded region extends in the lateral direction from a boundary with the non-bonded region to a side edge of the absorbent body in the lateral direction, The main body adhesive portion extends in the lateral direction from one of the bonded regions through the non-bonded region to the other of the bonded regions. Absorbent articles.

2. The back sheet is The non-skin facing surface further has a recessed portion recessed toward the skin side, The recessed portion is In the joining region of the intermediate region, the adhesive portion is disposed at a position overlapping the main body adhesive portion in a plan view and extends in the vertical direction. The absorbent article of claim 1.

3. the main body adhesive portion has a plurality of strip-shaped adhesive portions extending along the horizontal direction and arranged in the vertical direction with gaps therebetween, The recessed portion extends continuously in the vertical direction so as to overlap with two or more of the plurality of strip-shaped adhesive portions and at least one of the gap portions in a plan view. The absorbent article of claim 2.

4. The recessed portions are disposed in the pair of joining regions, respectively. The absorbent article according to claim 2 or 3.

5. The absorbent body is a high basis weight portion that is disposed in the intermediate region and has a relatively high basis weight; a low basis weight portion that is disposed around the high basis weight portion and has a relatively low basis weight; The high basis weight portion extends across the entire width of the non-bonded region in the lateral direction, The absorbent body has a slit portion disposed at least in the high basis weight portion and extending in the longitudinal direction, The slit portion overlaps with the non-bonded region in a plan view. The absorbent article according to claim 2 or 3.

6. a side edge of the high basis weight portion in the lateral direction is disposed in the vicinity of the non-bonded region so as to overlap with the bonded region in a plan view; The recessed portion is disposed in the joining region of the intermediate region so as to overlap with the high basis weight portion in a plan view. The absorbent article of claim 5.

7. The top sheet has a plurality of convex portions protruding toward the skin side and a plurality of concave portions protruding toward the non-skin side, The plurality of protruding portions contain the skin care agent and are arranged so as to overlap the non-bonding region in a plan view. The absorbent article of claim 1.

8. In the top sheet, an internal space is formed on the non-skin side of the protrusion. The absorbent article of claim 7.

9. The top sheet is made of a nonwoven fabric, The recessed portion is A fiber portion composed of fibers; and a void portion disposed between the fiber portions and configured with a void having a larger inter-fiber distance than the protrusions.

9. The absorbent article according to claim 7 or 8.

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