Absorbent article

Abstract

A main body of an absorbent article according to an embodiment of the present invention is divided in the longitudinal direction into: an intermediate region including an excretion-section-facing region facing the excretion section of a wearer; a front region longitudinally forward of the intermediate region; and a rearward region longitudinally rearward of the intermediate region. The surface sheet contains the skin care agent on the skin-facing surface at least in the intermediate region, and is bonded to the absorbent body. The back surface sheet has: a pair of bonding regions that are respectively disposed at least in the intermediate region so as to be spaced apart in the lateral direction and that are bonded to the absorbent body; and a non-bonding region that is disposed between the pair of bonding regions and that is not bonded to the absorbent body. The body adhesive portion extends in the lateral direction from one joining region to the other joining region through the non-joining region.

Description

Technical Field

[0001] This invention relates to absorbent articles such as sanitary napkins for menstrual use. Background Technology

[0002] Absorbent articles such as sanitary napkins generally consist of a front sheet, a back sheet, and an absorbent core disposed between them. For example, they are worn by attaching the adhesive portion of the back sheet (the non-skin-facing side) to the crotch area of ​​underwear. The front sheet comes into contact with the wearer's excretory genitals, and therefore a structure that prevents skin problems such as dampness is desirable. Based on this viewpoint, Patent Document 1 describes an absorbent article in which a skin-care agent is contained on the top of a protrusion of the front sheet.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-143543 Summary of the Invention

[0006] An absorbent article according to one aspect of the present invention includes a body having: a front sheet; a back sheet; an absorbent disposed between the front sheet and the back sheet; and a body adhesive portion disposed on the non-skin-facing side of the back sheet, and having a longitudinal direction corresponding to the wearer's front-back direction, and a transverse direction orthogonal to the longitudinal direction and corresponding to the wearer's left-right direction.

[0007] The main body is divided in the longitudinal direction into: a middle region including an excretory portion opposite to the wearer's excretory portion; a front region in front of the middle region in the longitudinal direction; and a rear region in the longitudinal direction of the middle region.

[0008] The front sheet contains a skin care agent on the skin-opposite side, at least in the middle region, and is attached to the absorbent.

[0009] The back sheet has:

[0010] At least in the intermediate region, a pair of engagement regions are respectively spaced apart in the lateral direction and engaged with the absorber; and

[0011] A non-joining region disposed between the pair of joining regions and not joined to the absorber.

[0012] The joining region extends laterally from the boundary with the non-jointing region to the lateral edge of the absorber.

[0013] The main adhesive portion extends laterally from one of the bonding regions through the non-bonding region to another of the bonding regions. Attached Figure Description

[0014] Figure 1 This is a top view showing the skin-facing side of an absorbent article according to an embodiment of the present invention.

[0015] Figure 2 From Figure 1 A cross-sectional view of the aforementioned absorbent material observed along line II-II.

[0016] Figure 3 This is a top view (rear view) showing the non-skin-facing side of the aforementioned absorbent article.

[0017] Figure 4 This is a schematic cross-sectional view used to illustrate the effect of the aforementioned absorbent material, showing the central area and the shorts attached to it when worn.

[0018] Figure 5 This is a partial cross-sectional view taken from the longitudinal X direction to illustrate the effect of the recessed portion of the aforementioned absorbent article. It schematically shows the back panel (jointing area), the main adhesive portion (band adhesive portion), and the shorts attached to it when worn.

[0019] Figure 6 This is used to explain the configuration of the above-mentioned recessed portion. Figure 3 A magnified view of a portion of the top view.

[0020] Figure 7 This is a top view showing the skin-facing side of the absorbent body of the aforementioned absorbent article.

[0021] Figure 8 This is a perspective view showing the front of the aforementioned absorbent article.

[0022] Figure 9 This is a cross-sectional view of the aforementioned front panel.

[0023] Figure 10 This is a top view showing the enlarged recess of the aforementioned front panel. Detailed Implementation

[0024] When the front panel contains a skin-care agent, the skin-care effect is achieved by transferring the agent through contact with the genital area. However, when the absorbent material is worn, it is pressed against the non-skin side by the wearer's labia, causing the entire absorbent material and the underwear to be pressed together. Sometimes, the central part of the front panel cannot easily fit into the gap between the labia of the genital area. Therefore, there is a need for absorbent materials that allow the front panel to fit snugly against the gap of the genital area and enable efficient contact between the skin-care agent contained in the front panel and the gap of the genital area.

[0025] This invention relates to an absorbent article that fits the gap between the front sheet and the excretory portion, enabling efficient contact between the skin care agent contained in the front sheet and the gap of the excretory portion.

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0027] [The overall structure of sanitary napkins (absorbent products)]

[0028] One embodiment of the present invention provides an absorbent article 1 that is a pad-shaped absorbent article for use on underwear such as panties, and is configured as, for example, a sanitary napkin. Hereinafter, the absorbent article 1 will be referred to as a sanitary napkin 1. Figure 1 As shown, the sanitary napkin 1 includes a main body M and a pair of wings W. The sanitary napkin 1 has a longitudinal direction X corresponding to the wearer's front-back direction and a transverse direction Y corresponding to the wearer's left-right direction and orthogonal to the longitudinal direction X. Furthermore, the sanitary napkin 1 also has a thickness direction Z orthogonal to both the longitudinal direction X and the transverse direction Y. The sanitary napkin 1 is, for example, symmetrically (left-right symmetrically) about the longitudinal center line CL that bisects the sanitary napkin 1 in the transverse direction Y.

[0029] In this instruction manual, "inner Y-axis" refers to the side closest to the longitudinal center line CL. "Outer Y-axis" refers to the side furthest from the longitudinal center line CL. In this instruction manual, "front X-axis" refers to the front in the longitudinal X direction, that is, the direction towards the wearer's abdomen. "Back X-axis" refers to the back in the longitudinal X direction, that is, the direction towards the wearer's back. In this instruction manual, "skin side" refers to the skin side in the thickness direction Z, that is, the side positioned on the wearer's side when the sanitary napkin 1 is worn. "Non-skin side" refers to the non-skin side in the thickness direction Z, that is, the side positioned on the clothing side when the sanitary napkin 1 is worn. In this instruction manual, "top view" means a top view (plan view) viewed from the thickness direction Z.

[0030] like Figure 1 As shown, the main body M is divided into a front region A, a middle region B, and a rear region C along the longitudinal direction X. Figure 1 In this embodiment, the middle region B includes the area opposite to the wearer's excretory portion, which is the area between the front and rear base ends of the wing W. In this embodiment, the excretory portion is the vaginal opening. The front region A is the area located in front of the middle region B (on the wearer's ventral side). The rear region C is the area located behind the middle region B (on the wearer's back side). Furthermore, when the sanitary napkin 1 does not have the wing W, the central region when the main body M is divided into three equal parts along the longitudinal direction X is designated as the middle region B, and the areas before and after it are designated as the front region A and the rear region C, respectively.

[0031] The wing W extends laterally outward from the main body M in the middle area B. The wing W folds back to the non-skin-facing side of the crotch area of ​​the shorts for use.

[0032] like Figure 2 As shown, the sanitary napkin 1 includes an absorbent core 4, a front sheet 2, and a back sheet 3 in its main body M. Figure 2 In the example shown, the sanitary napkin 1 has a structure in which the back sheet 3, the absorbent body 4, and the front sheet 2 are stacked sequentially in the thickness direction Z. These components are well joined together, for example by adhesives, compression grooves, heat sealing, etc., as described later.

[0033] The absorbent body 4 is disposed between the front sheet 2 and the back sheet 3, absorbing and retaining menstrual blood and other bodily fluids from the front sheet 2 side. In this embodiment, the absorbent body 4 has a laminated structure of absorbent sheets 40. The detailed structure of the absorbent body 4 will be described later.

[0034] The front sheet 2 is disposed on the skin side of the absorbent 4, forming a skin-facing surface 2a. The front sheet 2 is made of a liquid-permeable sheet material, preferably containing an uneven structure. Alternatively, other sheets (intermediate sheets, etc.) may be disposed between the front sheet 2 and the absorbent 4. The detailed structure of the front sheet 2 will be described later.

[0035] The back sheet 3 is disposed on the non-skin side of the absorbent 4, forming a non-skin-facing surface 3a. From the viewpoint of suppressing menstrual blood leakage, the back sheet 3 is preferably made of a sheet material having functions such as liquid impermeability and / or water repellency. Examples of such sheets include thermoplastic resin films, laminates of such films, and nonwoven fabrics. Furthermore, from the viewpoint of improving wearing comfort, the back sheet 3 is preferably breathable and / or moisture-permeable.

[0036] The sanitary napkin 1 also includes a main adhesive portion 7 disposed on the non-skin-facing surface 3a of the back cover 3. The main adhesive portion 7 is configured, for example, as an adhesive application area, for securing the sanitary napkin 1 to the underwear. In addition to the main adhesive portion 7 disposed on the main body M, the sanitary napkin 1 may also include wing adhesive portions 8 disposed on the non-skin-facing surface 3a of the wings W.

[0037] exist Figure 1 and Figure 2 In the example shown, from the viewpoint of improving the leak-proof performance of the transverse Y-side, the sanitary napkin 1 preferably also includes a pair of side sheets 5. The pair of side sheets 5 are disposed on the transverse Y-side of the front sheet 2. As the material of the side sheets 5, a sheet material with lower hydrophilicity than the front sheet 2 is preferred; specifically, examples include nonwoven fabrics, films, and laminates of nonwoven fabrics and films with lower hydrophilicity than the front sheet 2. For example, the side sheets 5 are joined to the front sheet 2 at a linear joint 51. Furthermore, for example, the side sheets 5 are joined to the back sheet 3 at the periphery of the sanitary napkin 1. The joints at the joints 51, etc., are formed by known joining methods such as adhesives, heat sealing, and ultrasonic sealing.

[0038] exist Figure 1 and Figure 2In the example shown, the preferred sanitary napkin 1 further includes a main body compression groove 6 formed by pressing the front sheet 2 in the thickness direction Z. The shape of the main body compression groove 6 is arbitrary; it can be configured as a single groove, or as shown in the example. Figure 1 Multiple sanitary napkins can be configured as shown in the example. Alternatively, sanitary napkin 1 may not include any compression grooves.

[0039] [Structure of the front panel]

[0040] like Figure 2 As illustrated in the example, the front sheet 2 contains a skin care agent 10 on the skin-facing side 2a at least in the middle region B and is bonded to the absorbent 4. By bonding the front sheet 2 to the absorbent 4 at least in the middle region B, the excretory fluid passing through the front sheet 2 can be absorbed by the absorbent 4 as early as possible. Alternatively, the front sheet 2 can be bonded to the absorbent 4 directly or indirectly, for example, by passing it through another sheet such as the middle sheet. When the front sheet 2 is bonded to the absorbent 4 through another sheet, the bonding areas of the front sheet 2 with the other sheet and the bonding areas of the other sheet with the absorbent 4 should overlap at least in the middle region B when viewed from above.

[0041] The bonding method between the front sheet 2 and the absorber 4 can include adhesives, heat-based or ultrasonic welding, etc., but from the viewpoint of increasing the freedom of coating pattern and ensuring the softness, breathability, and liquid permeability of the bonded part, the following method is preferred: Figure 2 As shown, this is adhesive 11. Hereinafter, the adhesive between the front panel 2 and the absorbent body 4 will be referred to as "adhesive 11". Adhesive 11 is an adhesive that can be used in absorbent articles, such as a hot melt adhesive.

[0042] The adhesive 11 can be applied to the entire skin-facing surface of the absorbent 4. Alternatively, it can be applied intermittently, with a mixture of applied and unapplied portions. Examples of such intermittent application patterns include spiral, mountaintop, omega, curtain, stripe, dot, and dashed lines. Figure 2 For convenience, the image is shown with the adhesive 11 applied to the skin-facing surface of the absorbent 4, but in practice, it may also include a non-applied portion.

[0043] The skincare agent 10 is disposed on at least a portion of the skin-facing surface 2a in the intermediate region B, preferably disposed on the entire intermediate region B. Furthermore, the skincare agent 10 may be disposed not only in the intermediate region B, but also on the skin-facing surfaces 2a in the front region A and the back region C. Additionally, from the viewpoint of improving skincare efficacy, the dosage of the skincare agent 10 per unit area on the skin-facing surfaces 2a may vary in different portions. Furthermore, in Figure 2 and Figure 4For convenience, the skin care agent 10 is shown in a layered configuration on the front sheet 2. However, in reality, the skin care agent 10 can also be attached to the fibers of the nonwoven fabric constituting the front sheet 2 or added to the inside of the fibers.

[0044] As the skin care agent 10 used in this embodiment, any skin care agent that has a skin care effect on the wearer's skin can be used without particular restrictions. Specific examples will be described later.

[0045] On the other hand, such as Figure 4 As shown, during wear, the transverse Y-side of the main body M is pressed towards the non-skin side by the left and right labia H1 of the wearer's excretory portion H. Therefore, generally speaking, the sanitary napkin 1, which is fixed to the panties S by the main body adhesive portion 7, is easily pressed towards the non-skin side. In this embodiment, by adopting the following structure, the transverse Y-center of the front panel 2 of the middle region B easily enters the gap H2 between the labia H1 (the gap of the excretory portion H), allowing the skin care agent 10 to come into contact with this gap H2. The specific structure that achieves the above-mentioned effect will be described below.

[0046] [Structure of the back panel]

[0047] like Figure 2 and Figure 3 As shown, the back sheet 3 has a pair of bonding regions 31 and non-bonding regions 32. The pair of bonding regions 31 are arranged at least in the middle region B, spaced apart in the transverse Y direction, and are bonded to the absorber 4. The pair of bonding regions 31 are preferably arranged across the longitudinal center line CL, and more preferably symmetrically arranged about the longitudinal center line CL. The non-bonding regions 32 are arranged between the pair of bonding regions 31 and are not bonded to the absorber 4. Furthermore, in Figure 3 In the diagram, the joining area 31 is shown using a dot pattern for illustration.

[0048] Similar to the front panel 2, the bonding area 31 is an area where bonding treatments such as adhesive bonding, heat-based or ultrasonic welding have been performed. From the viewpoint of increasing the freedom of coating pattern application and ensuring the flexibility and breathability of the bonded portion, the bonding area 31 is preferably as follows: Figure 2 As shown, the absorbent 4 is bonded using adhesive 12. Hereinafter, the adhesive between the bonding area 31 and the absorbent 4 will be referred to as "adhesive 12". Adhesive 12 is an adhesive suitable for use in absorbent articles, such as a hot melt adhesive.

[0049] The adhesive 12 can be applied to the entire bonding area 31. Alternatively, it can be applied intermittently, with a mixture of coated and uncoated portions. Examples of such intermittent application patterns include spiral, mountain-shaped, omega-shaped, curtain-shaped, striped, dotted, and dashed patterns. When the adhesive 12 is applied intermittently, the bonding area 31 is the area surrounding the outer edge of the coated portion of the adhesive 12, including the uncoated portion. Furthermore, in Figure 2 For convenience, the adhesive 12 is shown as being applied to the entire joint area 31, but in practice it may also include uncoated areas.

[0050] Reference Figure 3 The joining region 31 extends in the transverse Y direction from the boundary 33 with the non-joining region 32 to the side edge 4s of the absorber 4 in the transverse Y direction. Furthermore, the joining region 31 may be located at least a portion of the longitudinal X direction of the intermediate region B, but preferably extends entirely in the longitudinal X direction of the intermediate region B. More preferably, the joining region 31 extends from the intermediate region B to the front region A and the rear region C, and even more preferably... Figure 3 As shown, the longitudinal X of the absorber 4 extends throughout.

[0051] Non-bonded area 32 is an area where no bonding process, such as adhesive bonding, heat-based or ultrasonic welding, has been performed. For example... Figure 3 As shown, the top view of the non-joining region 32 is, for example, a rectangle that is longer in the longitudinal direction X, but it is not limited to this. For example, the boundary 33 between the non-joining region 32 and the joining region 31 can be a straight line parallel to the longitudinal direction X, or it can be curved, or it can be inclined or meandering. In the transverse direction Y, the non-joining region 32 can be located at the center of the transverse direction Y of the intermediate region B, but it can also be provided integrally throughout the center of the transverse direction Y, or it can extend further outward than the center of the transverse direction Y. Furthermore, the length of the longitudinal direction X of the non-joining region 32 is configured to be the same as the length of the longitudinal direction X of the joining region 31.

[0052] [Structure of the main adhesive section]

[0053] like Figure 3 As shown, the main adhesive portion 7 extends from one joining region 31 through a non-joining region 32 to another joining region 31 in the transverse Y direction of the intermediate region B. Furthermore, the main adhesive portion 7 can be disposed at least in the area where the joining region 31 and the non-joining region 32 exist in the intermediate region B, but it is preferable to be disposed throughout the longitudinal X direction of the intermediate region B. Moreover, the main adhesive portion 7 more preferably extends from the intermediate region B to the front region A and the rear region C.

[0054] In this embodiment, the main body adhesive portion 7 extends along the transverse Y direction and has a gap portion 72 in the longitudinal X direction (see reference). Figure 6Multiple strip-shaped adhesive portions 71 are configured. That is, each strip-shaped adhesive portion 71 located in the intermediate region B extends in the transverse Y direction from one joining region 31 through a non-joining region 32 to another joining region 31. In other words, the transverse Y end 71a of each strip-shaped adhesive portion 71 is located in the joining region 31. Figure 3 In the example shown, the strip adhesive portion 71 is configured as a rectangular shape that is longer in the transverse Y direction.

[0055] [Effects of this implementation method]

[0056] Reference Figure 4 The schematic diagram of the middle region B during wearing illustrates the effect of the sanitary napkin 1 (absorbent article) according to this embodiment. Furthermore, during wearing, the various structures can contact each other in the thickness direction Z, but... Figure 4 For the sake of explanation, these will be described separately. Furthermore, in the following description, "S" in "shorts" refers to the crotch area of ​​the shorts.

[0057] like Figure 4 As shown, during wearing, the transverse Y-side of the middle region B is pressed towards the non-skin side by the left and right labia H1 of the wearer's excretory portion H (refer to arrow F1). Thus, the transverse Y-side of the middle region B is pressed towards the non-skin side (refer to arrow F2). Here, the back panel 3 of the middle region B is fixed to the shorts S via the main adhesive portion 7 (band adhesive portion 71) from one joining region 31 through the non-joining region 32 to another joining region 31. Thus, the shorts S is pressed towards the non-skin side by the left and right joining regions 31, and due to the pressed shorts S, the non-joining region 32 is also pressed towards the non-skin side (refer to arrow F3).

[0058] On the other hand, in this embodiment, because the back sheet 3 has a non-adhesive region 32, the transverse Y-center portion of the absorbent 4 is not fixed to the non-adhesive region 32 and can be separated from the non-adhesive region 32 in the thickness direction Z. Therefore, the transverse Y-center portion of the absorbent 4 is less likely to be subjected to pressure F3 towards the non-skin side from the back sheet 3. As a result, the transverse Y-center portion of the absorbent 4 and the front sheet 2 (the area surrounded by the dotted line) that are adhering to it can relatively bulge towards the skin side compared to the transverse Y-side portion that would move towards the non-skin side due to pressure F1 (refer to arrow F4), thereby making it easier to 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 front sheet 2 can easily come into contact with the gap H2, thereby improving the skin care effect on the excretory part H.

[0059] [Structural example of a recessed portion]

[0060] On the other hand, during exercise or other activities, when the wearer suddenly or forcefully closes their left and right thighs, a strong external force is applied to the middle area B of the shorts S and sanitary napkin 1 in the direction of the inward transverse Y. At this time, there is a concern that the shorts S may warp due to this external force, and the central portion of the shorts S in the transverse Y and the non-jointing area 32 of the back panel 3 are prone to deforming towards the non-skin side. To address this, in this embodiment, the following recess 34 is provided in the back panel 3 to suppress warping of the shorts S.

[0061] Specifically, preferred options include Figure 3 and Figure 5 As shown, the back panel 3 also has a recessed portion 34 formed on the non-skin-facing surface 3a and recessed towards the skin side. The recessed portion 34 is located in the joining region 31 of the intermediate region B, at a position overlapping the main adhesive portion 7 when viewed from above, and extends in the longitudinal direction X. The recessed portion 34 is not limited to being parallel to the longitudinal direction X; it can also be inclined or meandering. Furthermore, the recessed portion 34 need only be located at a position overlapping the strip adhesive portion 71 when viewed from above.

[0062] Furthermore, the main adhesive portion 7 (band adhesive portion 71) on the recessed portion 34 is preferably as follows: Figure 5 As shown, the recess 34 is formed in a concave shape. As a method of forming such a structure, for example, the main body adhesive portion 7 can be formed only after the recess 34 is formed on the back sheet 3, or the recess can be formed on both the back sheet 3 and the main body adhesive portion 7. As a method of forming the recess 34 only on the back sheet 3, methods such as forming the concave-convex shape on the back sheet 3 itself through pressing or the like can be listed. Alternatively, the absorbent 4 can be formed with a recess through pressing, slit processing, or the like, and the absorbent 4 and the back sheet 3 can be stacked or pressed to form the recess 34 on the back sheet 3 at the position corresponding to the recess. Furthermore, as a method of forming the recess on both the back sheet 3 and the main body adhesive portion 7, methods such as forming the recess 34 on both the back sheet 3 and the main body adhesive portion 7 after the main body adhesive portion 7 is formed on the back sheet 3 through pressing (compression) or the like can be listed.

[0063] In the above structure, when worn, such as Figure 5As shown, the fabric of the shorts S is inserted into the recess 34 and fixed in place. Consequently, the fabric of the shorts S is stretched in the transverse Y direction according to the amount inserted into the recess 34, and the fabric of the shorts S opposite to the non-jointing area 32 also experiences moderate tension outward in the transverse Y direction. Therefore, even when subjected to strong external forces from the wearer's thighs, deformation such as bending of the shorts S opposite to the non-skin side can be suppressed, and deformation of the non-jointing area 32 that is subsequently bent towards the non-skin side can be suppressed. As a result, even in the presence of external forces inward in the transverse Y direction, the central portion of the absorbent body 4 in the transverse Y direction and the front panel 2 joined thereto are less likely to deform towards the non-skin side, and the front panel 2 can fit snugly against the gap of the excretion area.

[0064] Furthermore, by extending the recess 34 longitudinally X-axis, the fabric of the shorts S is fixed for a longer period in the longitudinal X-axis, which further enhances the deformation suppression effect of the non-jointed area 32. For example, as... Figure 6 As shown in the enlarged view, when the main adhesive portion 7 has multiple strip adhesive portions 71, the recessed portion 34 preferably extends continuously in the longitudinal direction X, overlapping with two or more of the multiple strip adhesive portions 71 and at least one gap portion 72 when viewed from above. That is, the recessed portion 34 can extend uninterruptedly to the strip adhesive portions 71 on both sides of its longitudinal direction X through the gap portion 72, or it can further extend uninterruptedly to the strip adhesive portions 71 and / or gap portions 72 located outside their longitudinal direction X. In this structure, the longitudinal direction X end 34a of the recessed portion 34 can be disposed on the strip adhesive portion 71, or it can be disposed on the gap portion 72 located outside the longitudinal direction X of the strip adhesive portion 71 through which the recessed portion 34 passes.

[0065] By using the recessed portion 34 formed across multiple strip-shaped adhesive portions 71, the deformation suppression effect of the shorts S can be achieved over a wider area in the longitudinal X direction, enhancing the deformation suppression effect of the front panel 2 and absorbent body 4, which are positioned opposite the non-bonding area 32, towards the non-skin side. Furthermore, in this structure, the area on the strip-shaped adhesive portion 71 of the shorts S is fixed within the recessed portion 34, while the area on the gap portion 72 of the shorts S is not fixed to the recessed portion 34, creating a localized lateral Y-shaped allowance in the fabric of the shorts S. Therefore, when subjected to external force from the wearer, the fabric of the shorts S in the gap portion 72 can stretch and contract according to the external force, providing a cushioning effect and stably maintaining the deformation suppression effect of the non-bonding area 32. As a result, in this structure, deformation of the central portion of the absorbent body 4 in the lateral Y direction and the front panel 2 bonded thereto towards the non-skin side can be suppressed, fully utilizing the fit and skin-care effect of the gap towards the excretion area achieved by the front panel 2.

[0066] Furthermore, such as Figure 3As shown, the back panel 3 preferably has multiple recesses 34. Furthermore, from the viewpoint of effectively suppressing deformation of the non-jointed areas 32 when an external force from the transverse Y is applied, it is preferable that the recesses 34 are respectively disposed in a pair of joint areas 31. This allows tension to be applied to the shorts S at the center of the transverse Y from both sides, further enhancing the effect of suppressing deformation of the non-jointed areas 32 towards the non-skin side. Thus, by adopting the above structure, the fit and skin-care effects achieved by the front panel 2 can be further enhanced.

[0067] Furthermore, it is even more preferable that a plurality of recesses 34 are provided in each joint region 31, 31. The number of recesses 34 in each joint region 31, 31 is not particularly limited, but from the viewpoint of effectively exerting the deformation suppression effect of the non-joint region 32, it is preferable to have 2 or more, more preferably 6 or more, and from the viewpoint of suppressing the decrease in rigidity of the joint region 31 caused by the recesses 34, it is preferable to have 30 or less, more preferably 20 or less.

[0068] As a preferred configuration, multiple recesses 34 can be arranged at intervals in the longitudinal (X) and / or transverse (Y) directions. Adjacent recesses 34 in the longitudinal (X) and / or transverse (Y) directions can be arranged neatly or staggered. Figure 3 As shown, by staggering the adjacent recesses 34 in the transverse Y direction in the longitudinal X direction, tension can be distributed over a larger area of ​​the fabric of the shorts S, thus suppressing the deflection of the fabric of the shorts S caused by localized tension and / or the resulting undesirable deformation of the non-jointed areas 32. Figure 3 In the example, each joint area 31 is provided with two longitudinal rows of recesses 34 spaced apart in the transverse Y direction, and the recesses 34 of adjacent rows are staggered in the longitudinal X direction.

[0069] [Example of an absorber structure]

[0070] like Figure 2 and Figure 7 As shown, in this embodiment, the absorber 4 preferably has a high-weight portion 41 disposed in the central region B and having a relatively high basis weight, and a low-weight portion 42 disposed around the high-weight portion 41 and having a relatively low basis weight. At this time, as... Figure 7 As shown, the high-weight portion 41 preferably extends across the entire width of the non-joined region 32 in the transverse Y direction. Furthermore, "the entire width of the non-joined region 32" refers to the width of the entire transverse Y direction of the non-joined region 32 from one boundary portion 33 to another boundary portion 33.

[0071] By adopting the above structure, the high-weight portion 41 with relatively high rigidity is positioned opposite the non-coupling area 32. Therefore, even when subjected to a lateral Y-force from the wearer's thigh, the high-weight portion 41 and the front panel 2 it cooperates with more easily resist the pressing pressure of the back panel 3 towards the non-skin side, maintaining a close fit with the gap of the excretory portion. Furthermore, the increased thickness of the portion opposite the gap of the excretory portion due to the high-weight portion 41 also improves the fit to the gap.

[0072] Furthermore, from the viewpoint of promoting preferred deformation towards the skin, the absorbent body 4 preferably has a slit portion 43 disposed at least in the high-weight portion 41 and extending in the longitudinal direction X. In this structure, the slit portion 43 preferably overlaps with the non-jointing region 32 when viewed from above.

[0073] The slit 43 is a cut formed in the thickness direction Z of the absorber 4. For example... Figure 2 As shown, the slit 43 preferably extends through the absorber 4. On the other hand, the slit 43 is not formed on the front sheet 2 and the back sheet 3 other than the absorber 4.

[0074] Furthermore, the "extending along the longitudinal direction X" of the slit portion 43 is not limited to extending parallel to the longitudinal direction X, but broadly includes extending linearly along the longitudinal direction X. The slit portion 43 can be straight, or partially curved and / or meandering. In addition, the slit portion 43 disposed on the high-weight portion 41 may at least partially overlap with the non-joining region 32 when viewed from above, but more preferably it overlaps entirely.

[0075] In the above structure, when the sanitary napkin 1 is subjected to external force in the transverse Y direction from the wearer's thigh, the slit portion 43 becomes the starting point of deformation, which can promote the deformation of the high-weight portion 41 and the front sheet 2 that is attached thereto. Furthermore, as described above, the absorbent body 4 and the front sheet 2, which are opposite to the non-attached area 32, easily separate from the non-attached area 32 and bulge towards the skin during wear. Therefore, the slit portion 43 can promote the deformation of the high-weight portion 41 and the front sheet 2 that is attached thereto, such as bending towards the skin. Thus, by adopting the above structure, the fit of the front sheet 2 to the gap of the excretory portion can be improved, and the skin care effect based on the skin care agent can be enhanced.

[0076] From the viewpoint of more effectively achieving the aforementioned effects, it is preferable that the absorber 4 has a plurality of slits 43 disposed in the high-weight portion 41. For example, these plurality of slits 43 are preferably disposed at intervals in the longitudinal direction X and / or the transverse direction Y. Figure 7 In the example shown, the absorber 4 has a slit row L consisting of a plurality of slit portions 43 arranged at intervals along the longitudinal direction X. For example, a plurality of slit portions L are arranged at intervals along the transverse direction Y. Furthermore, the slit portions 43 may be arranged not only in the high-weight portion 41 but also in the low-weight portion 42.

[0077] The slit portions 43 belonging to each slit row L are preferably arranged neatly along the longitudinal direction X. Furthermore, the slit portions 43 belonging to adjacent slit rows L in the transverse direction Y can be aligned or staggered in the longitudinal direction X. Figure 7 In the example shown, for instance, the slit portions 43 belonging to adjacent slit rows L in the transverse Y direction are staggered in the longitudinal X direction.

[0078] From the viewpoint that the absorber 4 forms an effective slit 43, it is preferable that the absorber 4 has a stacked structure comprising a plurality of absorbent sheets 40 (see reference). Figure 2 The absorbent sheet 40 is configured, for example, as a sheet in which a water-absorbing polymer is sandwiched and fixed between two sheet-like fiber layers made of hydrophilic fibers. Furthermore, the absorbent sheet 40 constituting the absorbent body 4 preferably contains entirely water-absorbing polymer, but it may also contain a portion of absorbent sheets that do not contain water-absorbing polymer.

[0079] In the absorber 4 with the above-described structure, the high-weight portion 41 can be a region where the number of layers of absorbent sheets 40 is greater than that of the low-weight portion 42. To achieve this structure, in this embodiment, it is preferable that the plurality of absorbent sheets 40 include one or more main absorbent sheets 40a and one or more central absorbent sheets 40b (see reference). Figure 2 ).

[0080] The main absorbent sheet 40a has the same planar shape as the absorber 4. The main absorbent sheet 40a can be formed, for example, from a sheet or laminate of material with the same planar shape as the absorber 4, or it can be formed by folding a large sheet in a manner that achieves that planar shape. Figure 2 In the example shown, the main absorbent sheet 40a is formed by overlapping multiple sheets (e.g., two sheets) in the thickness direction Z.

[0081] The central absorbent sheet 40b has the same planar shape as the high-weight portion 41 and is disposed in the forming area of ​​the high-weight portion 41 when viewed from above. The central absorbent sheet 40b can be formed, for example, from a sheet or a laminate thereof with the same shape as the high-weight portion 41, or it can be formed by folding a large sheet into that shape. In this structure, the number of layers in the high-weight portion 41 can be increased by an amount corresponding to that of the central absorbent sheet 40b. The central absorbent sheet 40b can be as follows: Figure 2 The arrangement shown is between multiple layers of the main absorbent sheet 40a, or it can be arranged on the skin side or non-skin side of the main absorbent sheet 40a.

[0082] By forming an absorbent body 4 with a high-weight portion 41 and a low-weight portion 42 through a layered structure of absorbent sheets 40, a slit portion 43 can be formed as a cut in the absorbent sheets 40, and the deformation effect based on the slit portion 43 can be reliably utilized. Furthermore, with this structure, the absorbent body 4 can be formed in a thin form, allowing the absorbent body 4 and the front sheet 2 to easily enter the gap of the excretion section.

[0083] [Structural examples of recessed areas and high-weight areas, etc.]

[0084] Furthermore, from the viewpoint of more reliably utilizing the deformation suppression effect of the non-jointed region 32 based on the recess 34, the positional relationship of the high-weight portion 41, the joint region 31, the non-jointed region 32, and the recess 34 is preferably configured as follows. That is, referring to... Figure 3 Preferably, the side edge 41s of the transverse Y of the high-weight portion 41 is arranged near the non-joining region 32 in a manner that overlaps with the joining region 31 when viewed from above, and the recessed portion 34 is arranged in the joining region 31 of the intermediate region B in a manner that overlaps with the high-weight portion 41 when viewed from above. Here, "near the non-joining region 32" refers to the area within 10 mm outward from the boundary 33 between the joining region 31 and the non-joining region 32 in the transverse Y direction.

[0085] In the above structure, the portion of the high-weight portion 41 with high rigidity, including the side edge 41s, overlaps with the joining region 31 when viewed from above and is positioned near the non-joining region 32. At least one recess 34 overlaps with the high-weight portion 41 when viewed from above and is positioned near the non-joining region 32, thereby firmly fixing the fabric of the shorts S to the joining region 31 near the boundary portion 33. This allows for more reliable application of lateral Y tension to the fabric of the shorts S opposite to the non-joining region 32, and more reliably suppresses deformation of the front panel 2 and absorbent body 4 positioned opposite to the non-skin side. Consequently, the high-weight portion 41 opposite to the non-joining region 32 and the front panel 2 joined thereto can more easily fit into the gap of the excretion portion without deforming towards the non-skin side, further improving the skin care effect.

[0086] At least one recess 34 is provided in the joint area 31 such that it overlaps with the high-weight portion 41 when viewed from above. However, from the viewpoint of applying tension to the shorts S from the left and right sides of the non-joint area 32 more stably, it is preferable to provide recesses 34 of the above structure in each joint area 31. Furthermore, from the viewpoint of applying tension to the shorts S from the left and right sides of the non-joint area 32 more reliably, it is more preferable to provide multiple recesses 34 of the above structure in each joint area 31.

[0087] [Example of the structure of the front panel]

[0088] like Figure 8 and Figure 9As shown, the front panel 2 preferably includes a plurality of protrusions 21 protruding towards the skin side and a plurality of recesses 22 protruding towards the non-skin side. Additionally, in Figure 8 and Figure 9 In the arrangement shown, the convex portion viewed from the skin-facing side 2a is convex portion 21, and the concave portion is concave portion 22. Conversely, the convex portion viewed from the non-skin-facing side is concave portion 22, and the concave portion is convex portion 21. Therefore, convex portion 21 and concave portion 22 share a portion.

[0089] For example, the protrusion 21 includes a top 21a located on the skin side and a surrounding wall 21b that annularly surrounds the top 21a. The recess 22 includes a bottom 22a located on the non-skin side and a surrounding wall 22b that annularly surrounds the bottom 22a. In the protrusion 21, the top 21a is as follows: Figure 9 When viewing the front panel 2 from the side, without any added load, the portion closest to the skin is divided into three equal parts along the thickness direction Z. The same applies to the recess 22; the bottom 22a is... Figure 9 When viewing the front panel 2 from the side, without applying any load, the part closest to the non-skin side is divided into three equal parts in the thickness direction Z.

[0090] The protruding shapes of the convex portion 21 and the concave portion 22 in the thickness direction Z are not particularly limited. Besides a cone or frustum shape with a rounded top as shown in the illustration, they can also be pyramids, frustums of pyramids, oblique cones, etc. Furthermore, the "ring-shaped" features in the wall portions 21b and 22b are not particularly limited as long as they form a continuous shape without ends when viewed from above on the front panel 2. They can be any shape, such as circular, elliptical, rectangular, or polygonal, when viewed from above on the front panel 2. Additionally, the wall portion 21b of the convex portion 21 and the wall portion 22b of the concave portion 22 share a common portion.

[0091] Reference Figure 1 , Figure 2 and Figure 9 In the above structure, it is preferable that the plurality of protrusions 21 contain the skin care agent 10 and are arranged to overlap with the non-joining region 32 when viewed from above. That is, the forming area of ​​the protrusion 21 may be arranged to overlap at least a portion of the non-joining region 32, but it is preferable to arrange it to completely overlap with the non-joining region 32. Further, as Figure 1 As shown, the area where the protrusion 21 is formed is more preferably located on the skin-facing surface 2a of the front panel 2 exposed from the side panel 5.

[0092] In addition, such as Figure 9 As shown, it is sufficient for at least a portion of the protrusion 21 to contain the skin-care agent 10, but it is particularly preferable that the skin-care agent 10 is contained in the top 21a. Additionally, in Figure 9 In the diagram, the black portion represents the skin care agent 10 contained in the front panel 2, and the intensity of the black indicates the amount of skin care agent 10 per unit area. Furthermore, [details omitted]. Figure 8 Illustration of skin care product 10.

[0093] By having the skin care agent 10 contained in the protrusion 21 and configured to overlap with the non-joining area 32 when viewed from above, the skin care agent 10 can more easily come into contact with the gap of the excretory part, thereby improving the skin care effect.

[0094] like Figure 8 and Figure 9 As shown, in the front panel 2, an internal space P is preferably formed on the non-skin side of the protrusion 21. That is, the internal space P is a space surrounded by the wall portion 21b and the top 21a of the protrusion 21. By adopting such a structure, the deformability of the protrusion 21 can be improved, and the fit to the gap of the excretory part can be improved. More specifically, for example, when an external force is applied inward in the transverse Y direction from the wearer's thigh, the protrusion 21 can be deformed in a flattened manner in the transverse Y direction due to the internal space P, making it easy to enter the narrow gap of the excretory part. In addition, because of the high deformability of the protrusion 21, the front panel 2 can be deformed according to the size of the wearer's labia and the size of the gap, thereby increasing the contact area of ​​the skin care agent 10.

[0095] Furthermore, the protrusions 21 and concave portions 22 are preferably arranged alternately and continuously along two intersecting directions when viewed from above. Here, these two directions preferably intersect at an angle of 30 degrees or more and 90 degrees or less in the XY plane. For example, in sanitary napkin 1, one of the two directions is the transverse Y direction, and the other is the longitudinal X direction. That is, in the illustrated example, the protrusions 21 and concave portions 22 are arranged alternately and continuously along the longitudinal X direction and the transverse Y direction.

[0096] From the viewpoint of forming the protrusions 21 and recesses 22 of the above structure and ensuring liquid permeability, the front sheet 2 is preferably made of nonwoven fabric. The nonwoven fabric can be made entirely of a single type of fiber with the same fineness, or it can be made of multiple fibers with different finenesses. Furthermore, since it is easy to form a preferred shape using heat, the nonwoven fabric is preferably made of heat-welding fibers. Examples of thermoplastic resins constituting the heat-welding fibers include polyolefin resins such as polypropylene and polyethylene, polyester resins, polyamide resins such as nylon 6 and nylon 66, and polyacrylonitrile resins. Furthermore, the heat-welding fibers can be fibers made of a single resin, or composite fibers made of two or more of these resins (e.g., core-sheath type fibers, parallel type fibers, etc.).

[0097] When the front panel 2 is made of nonwoven fabric, from the viewpoint of creating a front panel 2 with high deformability and cushioning, it is preferable to appropriately set the fiber density and inter-fiber distance within the front panel 2 according to the arrangement of the protrusions 21 and the recesses 22. For example, as Figure 10As shown in the top view viewed from the thickness direction Z, the recess 22 preferably has fibrous portions 22c made of fibers, and void portions 22d formed of gaps disposed between the fiber portions 22c. Figure 10 In the example shown, the recess 22 has a plurality of gaps 22d divided by the fiber portion 22c. The gaps 22d are preferably formed at the bottom 22a of the recess 22. In addition, in the above structure, the front sheet 2 is joined to the absorbent 4 at the fiber portion 22c.

[0098] In the above structure, the recess 22 includes a gap 22d, and therefore has a larger interfiber distance than the protrusion 21. Consequently, the recess 22, including the gap 22d, has a low fiber density and is easily deformable. This facilitates the deformation of the front sheet 2, improving the fit of the front sheet 2 to the gap of the excretion portion and enhancing the effectiveness of the skin care agent. Furthermore, in this specification, the interfiber distance is the average interfiber distance measured by the method described later. As a specific example, the interfiber distance of the gap 22d is preferably 200 μm or more, more preferably 500 μm or more, more preferably 2000 μm or less, and more preferably 1000 μm or less. In addition, the ratio of the interfiber distance of the bottom 22a of the recess 22 to the interfiber distance of the top 21a of the protrusion 21 is preferably 5.0 or more, more preferably 13 or more, more preferably 50 or less, and more preferably 25 or less.

[0099] The method for measuring the inter-fiber distance is explained. The inter-fiber distance of the nonwoven fabric is obtained by the following equation (1) based on the Wrotonowski assumption. The following equation (1) is generally used when determining the inter-fiber distance of a fiber assembly. Based on the Wrotonowski assumption, the fibers are cylindrical and arranged regularly without intersecting each other. In the calculation, the thickness t, basis weight W, fiber resin density ρ, and fiber diameter D used in the following equation (1) are each used for their respective values ​​for the measured object. The thickness t, basis weight W, and fiber diameter D are the average values ​​of the measured values ​​at multiple measurement points. In addition, the thickness t can use the value of the layer thickness TL described later.

[0100] [Formula 1]

[0101] Average interfiber distance (μm) =

[0102] D: Fiber diameter (μm)

[0103] ρ: Resin density of the fiber (g / cm³) 3 )

[0104] t: Thickness (mm)

[0105] W: Gram weight (g / m³) 2 )

[0106] The fiber diameter D described above is measured as follows. The measurement object (concave and convex portions) of the front plate 2 is cut using a razor (e.g., a single-edged razor manufactured by Feather Safety Razor Co., Ltd.) to obtain a measurement piece with a quadrilateral shape (8mm × 4mm) in plan view. When cutting the measurement object, care is taken to ensure that the structure of the cut surface of the measurement piece formed by this cutting is not damaged by pressure during cutting. A preferred method for cutting the measurement object is to immerse it in liquid nitrogen to fully freeze it before cutting. The measurement piece is attached to the sample stage using double-sided paper tape (Nicetack NW-15 manufactured by Nichiban Co., Ltd.). Next, platinum is applied to the measurement piece. The coating is applied using an ion sputtering apparatus E-1030 (trade name) manufactured by Hitachi Naka Seiki Co., Ltd., with a sputtering time of 30 seconds. The cut surface of the measurement piece is observed at 1000x magnification using an S-4000 field emission electron microscope manufactured by Hitachi, Ltd. For each fiber present in each measuring piece, the length of 10 fibers in the width direction relative to the length direction is measured, and the average value is taken as the fiber diameter.

[0107] The arrangement of the protrusions 21 and recesses 22 in the front panel 2 is not particularly limited, and for example, the following arrangement can be adopted. When viewed from above, the distance between the top 21a of the protrusion 21 and the bottom 22a of the recess 22, which are closest to each other, is preferably 1 mm or more, more preferably 3 mm or more, preferably 15 mm or less, and more preferably 10 mm or less. Furthermore, the distance between the tops 21a of adjacent protrusions 21 in the horizontal Y direction in the front panel 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. Furthermore, the distance between the tops 21a of adjacent protrusions 21 in the vertical X direction in the front panel 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.

[0108] The weight of the front sheet 2 can be appropriately selected according to its intended use. When used as a front sheet for absorbent products such as sanitary products, the average weight of the entire sheet is preferably 15 g / m². 2 The above, more preferably 20g / m 2 The above is preferably 50g / m 2 The following is more preferably 40g / m 2 the following.

[0109] Furthermore, regarding the thickness of front panel 2, it will be as follows: Figure 9The overall thickness of the front sheet 2 as seen from the side is defined as the sheet thickness TS, and the local thickness of the front sheet 2 bent into this concave-convex shape 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 absorption rate of bodily fluids during use is fast, backflow from the absorbent body 4 can be suppressed, and moderate cushioning can be achieved while maintaining the thinness of the product.

[0110] The layer thickness TL can also vary in different parts within the front sheet 2, preferably decreasing in the following order: the layer thickness TL at the top 21a of the protrusion 21 > the layer thickness TL at the wall portion 21b of the protrusion 21 (the wall portion 22b of the recess 22) > the layer thickness TL at the bottom 22a of the recess 22. This allows for a lower fiber density at the top 21a of the protrusion 21, resulting in a soft and pleasant skin feel. On the other hand, increasing the fiber density at the wall portion 21b of the protrusion 21 (the wall portion 22b of the recess 22) allows for good cushioning without shape collapse.

[0111] The sheet thickness TS and layer thickness TL were measured using the following methods. The sheet thickness TS was measured using a thickness gauge under a 0.05 kPa load on the front sheet 2. The thickness gauge used was a laser displacement gauge manufactured by OMRON. During the thickness measurement, measurements were taken at 10 points on the measurement area, and their average value was calculated as the thickness. Furthermore, the layer thickness TL was measured by cutting the front sheet 2 along the thickness direction using a Feather razor (model FAS-10, manufactured by Feather Safety Razor Co., Ltd.). Then, the cross-section of the cut sheet was magnified at approximately 20x using a VHX-900 electron microscope manufactured by Keyence Co., Ltd., to measure the thickness of each measurement area.

[0112] [Specific examples of skincare products]

[0113] The skin care agents used in this invention have, for example, a skin barrier repair function, and therefore preferably contain one or more ceramides. As ceramides, ingredients commonly used in cosmetics and other fields can be used, such as those represented by general formula (I) as described in International Publication No. 2022 / 034915.

[0114] [Chemistry 1]

[0115]

[0116] In formula (I),

[0117] R 11It represents a straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group or hydrogen atom with 4 to 30 carbon atoms that can be substituted with hydroxyl, carbonyl, or amino groups.

[0118] Z represents methylene, methine, or oxygen atom;

[0119] X 11 X 12 and X 13 Each can be used independently to represent a hydrogen atom, a hydroxyl group, or an acetoxy group;

[0120] X 14 This indicates a hydrogen atom, an acetyl group, or a glycerol group, or an oxo group formed together with an adjacent oxygen atom (however, when Z is methine, X...). 11 With X 12 One of them is a hydrogen atom, and the other does not exist; in X 14 When an oxygen group is formed, X 13 (Does not exist);

[0121] R 12 and R 13 Each can independently represent a hydrogen atom, hydroxyl group, hydroxyalkyl group (e.g., hydroxymethyl, hydroxyethyl, etc.) or acetoxymethyl group;

[0122] R 14 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 5 to 60 carbon atoms, which can be substituted with hydroxyl, carbonyl, or amino groups and may have ether, ester, or amide bonds in the main chain;

[0123] R 15 Represents a hydrogen atom, or a straight-chain or branched saturated or unsaturated hydrocarbon group having a total carbon number of 1 to 30, which may have substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy (however, in R...). 11 When R is a hydrogen atom and Z is an oxygen atom, 15 Preferably, the hydrocarbon group having a total carbon number of 10 to 30 substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy is preferred. Furthermore, in R... 11 When R is a hydrocarbon group, 15 Preferably, it represents a hydrogen atom, or a hydrocarbon group having a total carbon number of 1 to 8, which may have substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy.

[0124] The dashed lines indicate that the bonds may be unsaturated.

[0125] In equation (I), R is used. 11 The term "a straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 4 to 30 carbon atoms that can be substituted with hydroxyl, carbonyl, or amino groups" is preferred to be a straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 7 to 22 carbon atoms that can be substituted with hydroxyl. Z represents methylene, methine, or an oxygen atom.

[0126] X 11 X 12 and X 13 Each can be represented independently as a hydrogen atom, hydroxyl group, or acetoxy group. As X 11 X 12 and X 13 The combination of X is preferred. 11 X 12 and X 13 In this formula, 0 to 1 are hydroxyl groups, and the rest are combinations of hydrogen atoms. When Z is a methine, only X... 11 and X 12 One of them is a hydrogen atom, and the other does not exist. Furthermore, as X... 14 Preferably, it contains hydrogen atoms and glycerol groups. 12 and R 13 Each of the following can independently represent a hydrogen atom, a hydroxyl group, a hydroxyalkyl group (e.g., hydroxymethyl, hydroxyethyl, etc.), or an acetoxymethyl group, with R being preferred. 12 The atom is hydrogen or hydroxymethyl, preferably R. 13 It is a hydrogen atom. R 14 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 5 to 60 carbon atoms, which may have ether, ester, or amide bonds in the main chain, and can be substituted with hydroxyl, carbonyl, or amino groups. As R 14 It can include straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon groups with 5 to 35 carbon atoms that can be substituted with hydroxyl or amino groups, or groups of straight-chain, branched, or cyclic saturated or unsaturated fatty acids with 8 to 22 carbon atoms that can be substituted with hydroxyl groups bonded at the ω-position of the hydrocarbon group by ester or amide bonding. Preferably, isostearic acid, 12-hydroxystearic acid, or linoleic acid are preferred as the bonded fatty acids.

[0127] R 15 Represents a hydrogen atom, or a straight-chain or branched saturated or unsaturated hydrocarbon group having a total number of carbon atoms of 1 to 30, which may have substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy. In R 11 When R is a hydrogen atom and Z is an oxygen atom, 15 Preferably, the hydrocarbon group having a total carbon number of 10 to 30 may have substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy. Furthermore, in R... 11 When R is a hydrocarbon group, 15 Preferably, it is a hydrocarbon group representing a hydrogen atom, or having a total carbon number of 1 to 8 substituents selected from hydroxyl, hydroxyalkoxy, alkoxy, and acetoxy. More preferably, it is a hydrocarbon group representing a hydrogen atom, or having a total carbon number of 1 to 8 substituents selected from hydroxyl, hydroxyalkoxy, and alkoxy. Here, hydroxyalkoxy and alkoxy are preferably groups with a carbon number of 1 to 7.

[0128] For example, as ceramides, naturally derived ceramides or synthetic compounds of the same structure and their derivatives represented by the following general formula (II) are preferred (hereinafter also referred to as natural ceramides), or pseudo-ceramides represented by the following general formula (III) (hereinafter also referred to as pseudo-ceramides).

[0129] [Chemistry 2]

[0130]

[0131] In formula (II),

[0132] R 21 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group representing a carbon group that can be substituted by a hydroxyl group, having 7 to 19 carbon atoms.

[0133] Z1 represents methylene or methine;

[0134] X 15 X 16 and X 17 Each can be used independently to represent a hydrogen atom, a hydroxyl group, or an acetoxy group;

[0135] X 18 It represents a hydrogen atom, or forms an oxo group together with an adjacent oxygen atom (however, when Z1 is methine, X...). 15 With X 16 One of them is a hydrogen atom, and the other does not exist; in X 18 When an oxygen group is formed, X 17 (Does not exist);

[0136] R 22 Indicates hydroxyalkyl (e.g., hydroxymethyl, hydroxyethyl, etc.) or acetoxymethyl;

[0137] R 23 Represents a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms;

[0138] R 24 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group (preferably alkyl) with 5 to 30 carbon atoms that can be substituted with a hydroxyl group, or a group of a straight-chain or branched saturated or unsaturated fatty acid with 8 to 22 carbon atoms that can be substituted with a hydroxyl group (preferably alkyl) with a hydroxyl group substituted at the ω-terminus of the ester bonded to it.

[0139] The dashed lines indicate that the bonds may be unsaturated.

[0140] [Chemistry 3]

[0141]

[0142] In formula (III),

[0143] R 25 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group or hydrogen atom with 10 to 22 carbon atoms that can be substituted for a hydroxyl group.

[0144] X 19 Represents a hydrogen atom, acetyl group, or glycerol group;

[0145] R 26 A straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group (preferably alkyl) with 5 to 22 carbon atoms that can be substituted with hydroxyl or amino groups, or an ester-bonded group of a straight-chain or branched saturated or unsaturated fatty acid with 8 to 22 carbon atoms that can be substituted with hydroxyl groups (preferably alkyl) at the ω-terminus of the hydrocarbon group (preferably alkyl).

[0146] R 27 A hydrocarbon group (preferably alkyl) representing a hydrogen atom, or a hydroxyl, hydroxyalkoxy, alkoxy, or acetoxy group that can be substituted with a total of 1 to 30 carbon atoms.

[0147] Here, the natural type of ceramide represented by general formula (II) is explained. In formula (II), R 21 The hydrocarbon group shown has 7 to 19 carbon atoms, but preferably 11 to 15, and more preferably 13 to 15. Furthermore, as R... 21 The hydrocarbon group represented is preferably a straight-chain alkyl group. X 18 This represents a hydrogen atom, or it can form an oxo group together with an adjacent oxygen atom. Furthermore, as R... 24 Preferably, it is a straight-chain alkyl group with 9 to 27 carbon atoms that can be substituted with a hydroxyl group, or a group with linoleic acid bonded to the ω-terminus of the alkyl group. As R 24 More preferably, it is trialkyl, 1-hydroxypentadecanyl, 1-hydroxytrialkyl, heptadecanyl, 1-hydroxyundecyl, nonadecanyl, or pentadecyl with linoleic acid ester bonded at the ω-position.

[0148] Specific examples of natural ceramides include ceramides 1–7 that are amidated from sphingosine, dihydrosphingosine, phytosphingosine, or sphingadienine (e.g., in J. Lipid Res., 24:759 (1983)). Figure 2 And in J.Lipid Res., 35:2069 (1994) Figure 4(The ceramides described in the text are from pigs and humans). Furthermore, their N-alkyl forms (e.g., N-methyl forms) are also included in the natural ceramides. These ceramides can use the natural (D(-) form) optically active form, the non-natural (L(+) form) optically active form, or a mixture of the natural and non-natural forms. The relative stereoconfiguration of the above compounds can be the natural stereoconfiguration, or a non-natural stereoconfiguration, or a mixture thereof. Specifically, examples include ceramide EOP, ceramide AP (hydroxystearoyl phytosphingosine), and ceramide NP (N-stearoyl phytosphingosine), etc. Commercially available products containing such natural ceramides include, for example, Ceramide I as an EOP ceramide; Ceramide III, Ceramide IIIB, and Ceramide VI MB as NP ceramides (all manufactured by EVONIK); LiquidCrysta Ceramide 2 and LiquidCrysta Ceramide 25 (both manufactured by AROMAS Takasago Inc.); Ceramide 2 (manufactured by Sederma); and DS-CERAMIDE Y3S, DS-CERAMIDE Y3O, and DS-HydroCeramide 50S as NP ceramides (all manufactured by DOOSAN).

[0149] Next, the pseudoceramides represented by general formula (III) will be explained. In formula (III), R... 26 Preferably, it is heptyl, 1-hydroxyheptyl, nonyl, tridecyl, pentadecyl, undecyl with linoleic acid ester bonded at the ω-position, pentadecyl with linoleic acid ester bonded at the ω-position, pentadecyl with 12-hydroxystearic acid ester bonded at the ω-position, or undecyl with methyl branched isostearic acid amide bonded at the ω-position. Furthermore, in R... 25 When it is a hydrogen atom, it acts as R 27 Preferably, the hydrocarbon group with a total carbon number of 1 to 30 that can be substituted with hydroxyl, hydroxyalkoxy, alkoxy, or acetoxy (the hydrocarbon group is preferably alkyl), more preferably a hydrocarbon group with a total carbon number of 10 to 30 that can be substituted with hydroxyl, hydroxyalkoxy, alkoxy, or acetoxy (the hydrocarbon group is preferably alkyl), and especially preferably an alkyl group with a total carbon number of 12 to 20. In R 25 When the hydroxyl group is a straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 10 to 22 carbon atoms that can be substituted, it is used as R. 27 Preferably, it is an alkyl group with a total carbon number of 1 to 8 that can be substituted with hydrogen atoms, or hydroxyl, hydroxyalkoxy, alkoxy, or acetoxy groups. As R 27 The hydroxyalkoxy or alkoxy group in the sample is preferably a group with 1 to 7 carbon atoms.

[0150] Next, the pseudoceramides represented by general formula (III) will be explained.

[0151] In equation (III), R is... 26 Preferably, it is heptyl, 1-hydroxyheptyl, nonyl, tridecyl, pentadecyl, undecyl with linoleic acid ester bonded at the ω-position, pentadecyl with linoleic acid ester bonded at the ω-position, pentadecyl with 12-hydroxystearic acid ester bonded at the ω-position, or undecyl with methyl branched isostearic acid amide bonded at the ω-position.

[0152] Furthermore, in R 25 When it is a hydrogen atom, it acts as R 27 Preferably, the hydrocarbon group with a total carbon number of 1 to 30 that can be replaced by hydroxyl, hydroxyalkoxy, alkoxy or acetoxy (the hydrocarbon group is preferably alkyl), more preferably the hydrocarbon group with a total carbon number of 10 to 30 that can be replaced by hydroxyl, hydroxyalkoxy, alkoxy or acetoxy (the hydrocarbon group is preferably alkyl), and especially preferably the alkyl group with a total carbon number of 12 to 20.

[0153] In R 25 When the hydroxyl group is a straight-chain, branched, or cyclic saturated or unsaturated hydrocarbon group with 10 to 22 carbon atoms that can be substituted, it is used as R. 27 Preferably, it is a hydrogen atom, or an alkyl group with a total carbon number of 1 to 8 that can be substituted by hydroxyl, hydroxyalkoxy, alkoxy or acetoxy.

[0154] As R 27 The hydroxyalkoxy or alkoxy group in the sample is preferably a group with 1 to 7 carbon atoms.

[0155] Among pseudoceramides, the preferred type is R in general formula (III). 25 It is a hexadecyl group, X 19 For hydrogen atoms, R 26 It is a pentadecyl group, R 27 Compounds that are hydroxyethyl; R in general formula (III) 25 It is a hexadecyl group, X 19 For hydrogen atoms, R 26 For the base of Ren, R 27 Compounds that are hydroxyethyl; R in general formula (III) 25 It is a hexadecyl group, X 19 It is a glycerol group, R 26 It is a tridecyl group, R 27 Compounds of the 3-methoxypropyl group; R in general formula (III) 25 For hydrogen atoms, X 19 For hydrogen atoms, R 26 It is a pentadecyl group, R 27 Compounds of dodecyl group; R in general formula (III) 25For hydrogen atoms, X 19 For hydrogen atoms, R 26 It is 1-hydroxyheptyl, R 27 It is a compound of dodecyl group.

[0156] More preferably: R in general formula (III) 25 It is a hexadecyl group, X 19 For hydrogen atoms, R 26 It is a pentadecyl group, R 27 Compounds that are hydroxyethyl; R in general formula (III) 25 It is a hexadecyl group, X 19 For hydrogen atoms, R 26 For the base of Ren, R 27 Compounds that are hydroxyethyl; R in general formula (III) 25 It is a hexadecyl group, X 19 It is a glycerol group, R 26 It is a tridecyl group, R 27 It is a compound with 3-methoxypropyl.

[0157] Preferred option: R in general formula (III) 25 It is a hexadecyl group, X 19 For hydrogen atoms, R 26 It is a pentadecyl group, R 27 The compound is a hydroxyethyl compound (N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecylamide). Below, the structural formulas of particularly preferred compounds among the pseudoceramide classes represented by general formula (III) are listed.

[0158] [Chemistry 4]

[0159]

[0160] [Chemistry 5]

[0161]

[0162] As another example of the skin care agent used in this invention, the diamide derivative represented by the following formula (IV) as described in Patent Document 1 can be cited.

[0163] [Chemistry 6]

[0164]

[0165] (where R) 1 R represents a straight-chain or branched hydrocarbon group with 1 to 22 carbon atoms that can be substituted by hydroxyl and / or alkoxy groups. 2 R represents a straight-chain or branched divalent hydrocarbon group with 1 to 12 carbon atoms. 3This refers to a straight-chain or branched divalent hydrocarbon group with 1 to 42 carbon atoms, a straight-chain or branched alkylene group with 11 to 42 carbon atoms, or an alkenyl group having 1 to 4 double bonds.

[0166] The diamide derivative represented by general formula (IV) is the diamide derivative of the invention described in International Publication No. WO00 / 61097, which has the medicinal effect of improving the moisture retention capacity and barrier function of the stratum corneum. When this diamide derivative, held at the protrusion 21, comes into contact with the wearer's skin during the wearing of absorbent articles, it acts as an oily skin care agent, capable of inhibiting and / or improving skin rashes. When using the above-mentioned diamide derivative, either one or more diamide derivatives can be used simultaneously.

[0167] Furthermore, other skin care agents that can be used in this invention include, for example, oily skin care agents that can be used as emollients in the cosmetics field. Specific examples of such other skin care agents include: liquid paraffin, silicone oil, plant and animal oils (olive oil, jojoba oil, safflower oil, argan oil, squalane, and squalene, etc.), various plant extracts (peach leaf extract, ginger extract, horse chestnut extract, seaweed extract, eucalyptus extract, Roman chamomile extract, carrot extract, platycodon root extract, oat extract, licorice leaf extract, licorice leaf extract, chuanxiong extract, jujube extract, tangerine peel extract, peach kernel extract, coix seed extract, etc.), chamomile ET, neem extract, allantoin, dipotassium glycyrrhizate, stearyl glycyrrhetinate, niacinamide, vitamin E, monoglycerides, diglycerides, and triglycerides. Esters, aliphatic ethers (myristyl-1,3-dimethyl butyl ether, palmityl-1,3-dimethyl butyl ether, stearyl-1,3-dimethyl butyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol esters, paraffin wax, C12-C22 fatty acids, C12-C44 fatty acid ethers, C12-C22 fatty alcohols, petrolatum, fatty acid sorbitan esters (can be any one of monoester, diester, and triester), polyoxyethylene fatty acid sorbitan esters (can be any one of monoester, diester, and triester), metallic soaps (magnesium stearate, etc.), sucrose fatty acid esters, cyclodextrin fatty acid esters, organosilicon, organosilicon resins, other emollients, and emulsion compositions including emollients and curing agents, etc. Various skin care agents can be used alone or in combination with two or more.

[0168] From the viewpoint of not reducing the permeability of bodily fluids excreted onto the front sheet 2, a mixture of C12-C22 fatty alcohols (preferably stearyl alcohol) and diamide derivatives of the above general formula (IV) is preferred. From the viewpoints of skin transferability, skin care effect, feel during use, and permeability of bodily fluids onto the front sheet, the mixing ratio (stearyl alcohol / diamide derivative) of stearyl alcohol is preferably 90 / 10 to 50 / 50 (mass%). It is preferable to heat this mixture to increase its fluidity before applying it to the nonwoven fabric of the front sheet 2. After attaching it to the nonwoven fabric, its fluidity is reduced by leaving it at room temperature, making it easier to retain on the front sheet 2.

[0169] [Example of skincare product formulation]

[0170] like Figure 9 As shown, the skin care agent 10 is preferably contained in the top 21a of the protrusion 21, and more preferably in both the top 21a and the wall 21b. From the viewpoint of further bringing the skin care agent 10 into contact with the skin, the distribution of the skin care agent 10 at the protrusion 21 is preferably such that the skin care agent dosage per unit area in the wall 21b is less than that at the top 21a. Furthermore, the skin care dosage is compared on opposite sides of the skin. Additionally, the skin care agent 10 may also be contained in the recess 22.

[0171] From the viewpoint of easily achieving the aforementioned distribution, the coating method of the skin care agent 10 can include, for example, spraying a skin care agent whose fluidity has been improved by heating or as a solution onto the skin-facing side of a nonwoven fabric with an uneven structure. Furthermore, the coating method of the skin care agent is not limited to this; other methods such as mold coating, slot spraying, curtain spraying, meltblowing, spiral spraying, gravure printing, and bead coating can also be used.

[0172] The method for measuring skincare product dosage is explained. The measurement area of ​​the front sheet is cut off with scissors to obtain a measurement sheet of a specified area (e.g., a square with sides of 1-2 mm). Then, for each measurement sheet, the ratio of the absorption peak area from the skincare agent to the absorption peak area from the front sheet is calculated, for example by Fourier transform infrared spectroscopy (FT-IR). This ratio can be used as an indicator of skincare product dosage for comparison. Furthermore, a larger ratio indicates a larger skincare product dosage. For example, the ATR method can be used for FT-IR spectroscopy. As a specific example, when a front sheet made of PET / PE is coated with the diamide derivative described later, the absorption peak of the amide group from the skincare agent at 1600-1670 cm⁻¹ is calculated for each measurement sheet. -1 Compared to the CH absorption peak at 1400-1500 cm⁻¹ from the front side -1The ratio. By comparing this ratio across measurement patches of the same area, it is possible to compare the skincare dosage per unit area for each measurement subject.

[0173] [Example of absorber dimensions]

[0174] From the viewpoint of ensuring absorbency and a good fit to the gap of the excretion portion, the thickness of the high-weight portion 41 of the absorbent 4 is preferably 0.7 mm or more, more preferably 1 mm or more, and further preferably 5 mm or less, and even more preferably 4 mm or less. Furthermore, the thickness of the high-weight portion 41 can be measured in the same way as the sheet thickness TS of the front sheet 2.

[0175] [Example of dimensions for non-jointed areas]

[0176] From the viewpoint of promoting separation between the absorber 4 and the non-bonding region 32, the transverse Y dimension of the non-bonding region 32 is preferably 5 mm or more, more preferably 10 mm or more. From the viewpoint of ensuring bonding between the absorber 4 and the back sheet 3, it is preferably 40 mm or less, more preferably 25 mm or less. Furthermore, as described above, the longitudinal X dimension of the non-bonding region 32 is preferably longer than or equal to the longitudinal X length of the intermediate region B, more preferably equal to the longitudinal X length of the absorber 4. Additionally, this dimension and the dimensions of the various parts described below are taken as the average dimension at five or more points approximately evenly spaced within the measurement object.

[0177] [Example of dimensions for the strip adhesive section]

[0178] When the main adhesive portion 7 has a plurality of strip-shaped adhesive portions 71 extending in the transverse Y direction, the size of each strip-shaped adhesive portion 71 is not particularly limited, and for example, the following sizes can be adopted. From the viewpoint of ensuring the adhesiveness provided by the strip-shaped adhesive portions 71 and suppressing undesirable conditions such as adhesion within the strip-shaped adhesive portions 71, the longitudinal X dimension of each strip-shaped adhesive portion 71 is preferably 1 mm or more, more preferably 2 mm or more, preferably 8 mm or less, and more preferably 6 mm or less. From the viewpoint of ensuring adhesiveness and suppressing undesirable conditions such as adhesion between adjacent strip-shaped adhesive portions 71, the longitudinal X dimension of the gap portion 72 between adjacent strip-shaped adhesive portions 71 is preferably 1 mm or more, more preferably 2 mm or more, preferably 5 mm or less, and more preferably 4 mm or less. The transverse Y dimension of each strip-shaped adhesive portion 71 can be appropriately set according to the transverse Y dimension of the main body M, preferably 40 mm or more, more preferably 50 mm or more, preferably 90 mm or less, and more preferably 70 mm or less.

[0179] [Example of dimensions for the recessed portion]

[0180] The transverse Y dimension (width) of each recess 34 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 recess 34 referred to here is the width in its natural state without tension applied to the absorbent article when attached to the shorts S, etc., and is a width that can be visually confirmed from the non-skin-facing side 3a using a magnifying glass, optical microscope, or the like. The longitudinal X dimension of each recess 34 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 transverse Y interval between adjacent recesses 34 is preferably 3 mm or more, more preferably 7 mm or more, preferably 20 mm or less, and more preferably 15 mm or less.

[0181] [Example of gap dimensions]

[0182] The transverse Y dimension (width) of the slit portion 43 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 referred to here is the width in its natural state without applying tension to the absorbent article when it is attached to the shorts S, etc. The longitudinal X dimension of each slit portion 43 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 transverse Y spacing between adjacent slit portions 43 is preferably 3 mm or more, more preferably 7 mm or more, preferably 20 mm or less, and more preferably 15 mm or less.

[0183] [Other Implementation Methods]

[0184] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0185] The absorbent articles of the present invention are not limited to Figure 2 The structure shown may, for example, include an intermediate sheet between the front sheet 2 and the absorber 4.

[0186] For example, the back sheet 3 may not have the recessed portion 34. Furthermore, the structure of the absorbent body 4 is not limited to the laminate of the absorbent sheet 40 described in the above embodiments. Furthermore, the structure of the front sheet 2 is not limited to the example of the textured nonwoven fabric described in the above embodiments.

[0187] In the above embodiments, sanitary napkins were shown as an example of absorbent articles, but any absorbent article used to secure underwear such as panties is acceptable and is not limited to sanitary napkins. The absorbent articles of the present invention may also include, for example, diaper pads, vaginal discharge pads, etc.

[0188] Explanation of reference numerals in the attached figures

[0189] 1... Sanitary napkins (absorbent products)

[0190] 2... Front view

[0191] 3...back side

[0192] 31……Jointing area

[0193] 32……Non-jointed areas

[0194] 33……Boundary Section

[0195] 4...Absorbent

[0196] 7……Main body adhesive section

[0197] 10...skin care products

[0198] A...the area ahead

[0199] B...middle area

[0200] C... rear area

[0201] M……Main body.

[0202] Industrial availability

[0203] According to the present invention, the absorbent article can fit the gap between the front sheet and the excretory part, so that the skin care agent contained in the front sheet can come into efficient contact with the gap between the excretory part.

Claims

1. An absorbent article having a body comprising: Front view; Back view; An absorber disposed between the front sheet and the back sheet; The absorbent article has a main adhesive portion disposed on the non-skin-facing side of the back panel, and has a longitudinal direction corresponding to the wearer's front-back direction, and a transverse direction orthogonal to the longitudinal direction and corresponding to the wearer's left-right direction. The absorbent material is characterized by: The main body is divided in the longitudinal direction into: a middle region including an excretory-opposing region opposite to the wearer's excretory portion; and a front region in front of the middle region in the longitudinal direction. And the rear region behind the longitudinal direction of the middle region, The front panel contains a skin care agent on the skin-opposite side, at least in the middle region, and is bonded to the absorbent. The back sheet has: At least in the intermediate region, a pair of engagement regions, spaced apart laterally, that engage with the absorber; and A non-joining region disposed between the pair of joining regions that does not join the absorber. The joining region extends in the lateral direction from the boundary with the non-jointing region to the lateral side edge of the absorber. The main adhesive portion extends laterally from one of the bonding regions through the non-bonding region to another of the bonding regions.

2. The absorbent article as claimed in claim 1, characterized in that: The back panel also has a recessed portion formed on the non-skin-facing side, which is recessed towards the skin. The recessed portion is located in the joint area of ​​the intermediate region, at a position that overlaps with the main adhesive portion when viewed from above, and extends in the longitudinal direction.

3. The absorbent article as described in claim 2, characterized in that: The main adhesive portion has a plurality of strip-shaped adhesive portions extending in the transverse direction and arranged with gaps in the longitudinal direction. The recessed portion extends continuously in the longitudinal direction in such a manner that two or more of the plurality of strip adhesive portions and at least one of the gap portions overlap when viewed from above.

4. The absorbent article as described in claim 2 or 3, characterized in that: The recessed portions are respectively disposed in the pair of mating regions.

5. The absorbent article as described in claim 2 or 3, characterized in that: The absorber has: The high-grammage section, located in the intermediate region, has a relatively high grammage; and The low-weight portion is positioned around the high-weight portion and has a relatively low weight. The high-weight portion extends across the entire width of the non-jointed area in the transverse direction. The absorber has at least a slit portion disposed in the high-weight portion and extending in the longitudinal direction. The slit overlaps with the non-jointed area when viewed from above.

6. The absorbent article as claimed in claim 5, characterized in that: The lateral side edge of the high-weight portion is positioned near the non-joining area in a manner that overlaps with the joining area when viewed from above. The recessed portion is configured in the joint region of the intermediate region in a manner that overlaps with the high-weight portion when viewed from above.

7. The absorbent article as claimed in claim 1, characterized in that: The front panel includes multiple protrusions extending towards the skin and multiple recesses extending towards the non-skin side. The plurality of protrusions contain the skin care agent and are configured to overlap with the non-joining area when viewed from above.

8. The absorbent article as claimed in claim 7, characterized in that: An internal space is formed on the non-skin side of the protrusion in the front panel.

9. The absorbent article as claimed in claim 7 or 8, characterized in that: The front panel is made of non-woven fabric. The recess has: The fibrous part composed of fibers; and The void portion, which is disposed between the fiber portions, is composed of a void having an inter-fiber distance larger than that of the protrusion.

10. The absorbent article as claimed in claim 1 or 2, characterized in that: The front sheet is bonded to the absorber via other sheets.

11. The absorbent article as claimed in claim 1 or 2, characterized in that: The skin care agent is disposed in the entire central area.

12. The absorbent article as claimed in claim 1 or 2, characterized in that: The dosage of the skin care agent per unit area varies on the opposite side of the skin.

13. The absorbent article as claimed in claim 1 or 2, characterized in that: The joining area extends longitudinally throughout the central region.

14. The absorbent article as claimed in claim 1 or 2, characterized in that: The joining area extends from the central area to the front area and the rear area.

15. The absorbent article as claimed in claim 2 or 3, characterized in that: When viewed from above, the main body adhesive portion that overlaps with the recessed portion is formed into a concave shape along the recessed portion.

16. The absorbent article as claimed in claim 2 or 3, characterized in that: The recessed portion is provided in multiples in each of the pair of mating regions.

17. The absorbent article as claimed in claim 16, characterized in that: The number of recessed joint areas in each pair of joint areas is more than 2 and less than 30.

18. The absorbent article as claimed in claim 16, characterized in that: The plurality of recesses are arranged at intervals in the lateral direction. The recesses that are adjacent in the lateral direction are staggered in the longitudinal direction.

19. The absorbent article as claimed in claim 18, characterized in that: The lateral spacing between adjacent recesses is 3 mm or more and 20 mm or less.

20. The absorbent article as claimed in claim 1 or 2, characterized in that: The lateral dimension of the non-jointed area is greater than 5 mm and less than 40 mm.

21. The absorbent article as claimed in claim 2, characterized in that: The lateral dimension of the recess is 0.1 mm or more and 1.0 mm or less.

22. The absorbent article as claimed in claim 2, characterized in that: The longitudinal dimension of the recess is 10 mm or more and 35 mm or less.

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