Absorbent article

Abstract

An absorbent article is provided that can improve the fit relative to the excretion opening, thereby suppressing discomfort during wear. The absorbent article (10) has a front-to-back direction (L), a width direction (W), and a thickness direction (T); a crotch area (S3), a front waist area (S1), and a back waist area (S2) located behind the crotch area; an absorbent core (50); and a compression area provided with a compression portion that compresses the absorbent core in the thickness direction. The compression area has a central compression area (R81) extending in the front-to-back direction in the central area (R51) of the area obtained by dividing the absorbent core into five equal parts in the width direction. The central compression area extends in a straight line across the center of the crotch area in the front-to-back direction.

Description

Technical Field

[0001] The present invention relates to an absorbent article having a compression portion formed by compressing an absorbent core in the thickness direction. Background Technology

[0002] Patent Document 1 discloses an absorbent article having a compression section formed by compressing an absorbent core in the thickness direction. The compression section of Patent Document 1 is arranged in a lattice pattern over the entire area of ​​the absorbent core. According to the absorbent article of Patent Document 1, it is possible to suppress the twisting and deformation of the absorbent core throughout its entire range, while simultaneously improving the liquid diffusion within the absorbent core.

[0003] Patent Document 2 discloses an absorbent article having a pair of low-weight-per-unit-area sections extending in the front-back direction. When worn, the absorbent core deforms around the low-weight-per-unit-area sections, causing the area on the outer side in the width direction of the low-weight-per-unit-area sections to stand upright with the area sandwiched between the two low-weight-per-unit-area sections as its bottom, forming a concave shape with raised walls on the left and right sides when viewed from the front. Excrement can be temporarily stored in this concave-shaped bag. Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent No. 6447396 Patent Document 2: Japanese Patent Application Publication No. 2011-152209 Summary of the Invention

[0005] However, the aforementioned absorbent materials have the following problems. If a grid-like compression section is provided throughout the entire area of ​​the absorbent core, as in Patent Document 1, the stiffness of the entire absorbent core area increases. Furthermore, since the compression area also extends along the width direction, the absorbent core is difficult to deform inwards in the width direction. Therefore, the absorbent core cannot easily conform softly to the excretion opening, sometimes resulting in discomfort when wearing it.

[0006] Furthermore, in the absorbent article of Patent Document 2, because the absorbent core is deformed into a concave shape, a distance is easily created between the drain opening and the absorbent article in the center of the width direction of the absorbent core. In particular, if the absorbent article becomes heavier due to the absorption of bodily fluids, the absorbent article will sink downwards, sometimes causing discomfort when wearing it.

[0007] The present invention was made in view of the following problem, and its object is to provide an absorbent article that can improve the fit relative to the excretion opening and thus suppress discomfort when wearing it.

[0008] An absorbent article of one embodiment has: mutually orthogonal front-back direction, width direction, and thickness direction; a crotch region comprising a center in the front-back direction, a front waist region located forward of the crotch region, and a rear waist region located backward of the crotch region; an absorbent core disposed at least in the crotch region, having absorbent material; and a compression region disposed with a compression portion forming at least a compression portion that compresses the absorbent core in the thickness direction. The compression region has a central compression region extending along the front-back direction in a central region located at the center of a region obtained by dividing the absorbent core into five equal parts in the width direction. The central compression region extends linearly across the center of the crotch region in the front-back direction.

[0009] Another absorbent article comprises: mutually orthogonal front-back, width, and thickness directions; a crotch region comprising a center in the front-back direction, a front waist region located forward of the crotch region, and a rear waist region located backward of the crotch region; an absorbent core disposed at least in the crotch region, having absorbent material; and a compression region comprising a compression portion that compresses the absorbent core in the thickness direction. The compression region has a central compression region extending along the front-back direction in a central region located at the center of a region obtained by dividing the absorbent core into five equal parts in the width direction. The length of the central compression region in the width direction is less than 10% of the length of the absorbent core in the width direction at the center of the crotch region in the front-back direction. Attached Figure Description

[0010] Figure 1 This is a front view of the absorbent article according to the implementation method. Figure 2 This is a top view of the absorbent article in its unfolded state according to the embodiment. Figure 3 It is along Figure 2 The cross-sectional view shown along line AA. Figure 4 This is a top view of the absorption core. Figure 5 This is a cross-sectional view of the absorber core in its elongated state. Figure 6 This is a cross-sectional view of the absorbent core in its worn state. Figure 7 yes Figure 4 An enlarged top view of section D shown. Detailed Implementation

[0011] (1) Overview of the implementation method From the description in this specification and the accompanying drawings, at least the following become clear. Method 1 includes: mutually orthogonal front-back, width, and thickness directions; a crotch region comprising a central area in the front-back direction, a front waist region located forward of the crotch region, and a rear waist region located backward of the crotch region; an absorbent core, at least disposed in the crotch region, having absorbent material; and a compression region comprising a compression portion that compresses the absorbent core in the thickness direction. The compression region has a central region extending in the front-back direction within a central region of a region obtained by dividing the absorbent core into five equal parts in the width direction. The central compression region extends linearly across the center of the crotch region in the front-back direction. The central compression region is disposed in the central region located in the center of the absorbent core in the width direction, and serves as the deformation base point of the absorbent core in the central region. The central compression region extends linearly in the front-back direction, and the deformation base point propagates in the front-back direction. Thus, the absorbent core in the central region deforms into a convex shape with the central compression region as the base point within a certain range extending linearly in the front-back direction. It can improve the fit of the absorbent core to the drainage opening and suppress discomfort when wearing it.

[0012] Method 2's technical solution includes: mutually orthogonal front-back, width, and thickness directions; a crotch area comprising a central portion in the front-back direction, a front waist area located forward of the crotch area, and a rear waist area located backward of the crotch area; an absorbent core, at least disposed in the crotch area, having absorbent material; and a compression region comprising a compression portion that compresses the absorbent core in the thickness direction. The compression region has a central compression region extending along the front-back direction in the central region of the area obtained by dividing the absorbent core into five equal parts in the width direction. The length of the central compression region in the width direction is less than 10% of the length of the absorbent core in the width direction at the center of the crotch area. The central compression region, located at the center in the width direction of the absorbent core, becomes the deformation base point of the absorbent core. By deforming into a convex shape with the central compression region as the base point, the fit of the absorbent core relative to the drainage opening can be improved, suppressing discomfort during wear. Furthermore, the central compression region occupies a relatively narrow area relative to the entire width direction of the absorbent core. Therefore, force is easily concentrated in the central compression area, facilitating the convex deformation of the absorbent core. Furthermore, the central compression area occupies a narrower area relative to the entire width of the absorbent core, allowing for the setting of deformation base points while suppressing the area of ​​the central compression area. Since convex deformation can be achieved while suppressing the area of ​​the region hardened by compression, the contact with the skin is softer. This reduces discomfort during wear and improves the fit of the absorbent core to the drainage opening.

[0013] According to a preferred embodiment, based on the technical solutions of embodiment 1 or embodiment 2, the technical solution of embodiment 3 can have the following features. The absorbent article comprises: an absorbent body having the absorbent core, a liquid-permeable top sheet covering the skin side of the absorbent core, and a liquid-impermeable bottom sheet covering the non-skin side of the absorbent core; and an outer garment located on the non-skin side of the absorbent body, covering the wearer's waist in the rear waist region and the front waist region. The central compression region overlaps with both a front joining region on the front waist region side and a rear joining region on the rear waist region side where the outer garment and the absorbent body are joined. According to this embodiment, since the central compression region is arranged overlapping with the front and rear joining regions, it is easy to form a convex deformation with the central compression region as a base point over a large area from the crotch region to the waist region.

[0014] According to a preferred embodiment, based on the technical solutions of any one of embodiments 1 to 3, the technical solution of embodiment 4 can have the following characteristics: The central compression region is continuous from the front edge to the rear edge of the absorber core. According to this embodiment, deformation can be formed over the entire region of the absorber core in the front-rear direction, with the central compression region as the base point.

[0015] According to a preferred embodiment, based on the technical solutions of any one of embodiments 1 to 4, the technical solution of embodiment 5 may have the following characteristics: The compression portion of the central compression region is recessed from the non-skin side of the absorbent core toward the skin side. According to this embodiment, the absorbent core is easily deformed into a convex shape toward the skin side with the central compression region as a base point, which can further improve the fit relative to the excretion opening.

[0016] According to a preferred embodiment, based on the technical solutions of any one of embodiments 1 to 5, the technical solution of embodiment 6 may have the following features: The compression region has a lateral compression region located on the outer side of the central compression region in the width direction. The length of the lateral compression region in the width direction is longer than the length of the central compression region in the width direction. According to this embodiment, since the lateral compression region with a longer length in the width direction is located to the side of the central compression region, the central compression region with a shorter length in the width direction can easily function as a deformation base point, making it easier to achieve the convex shape of the absorption core. In addition, by using the lateral compression region with a wider width to support the deformation of the central compression region, it is easier to maintain the convex deformation of the absorption core.

[0017] According to a preferred embodiment, based on the technical solution of embodiment 6, the technical solution of embodiment 7 can have the following features: The compression portion disposed in the lateral compression region is lattice-shaped when viewed from above. According to this embodiment, the compression portion disposed in the lateral compression region extends both in the front-back direction and in the width direction, making it easy for the absorbent core to deform in a planar shape rather than a linear shape. By utilizing the planar deformation of the lattice-shaped compression portion in the lateral compression region, it is easy to continuously support the convex deformation of the central compression region from the side. This allows the convex deformation at the center of the absorbent core in the width direction to be maintained.

[0018] According to a preferred embodiment, based on the technical solutions of either embodiment 6 or 7, the technical solution of embodiment 8 may have the following features: The lateral compression region has a first lateral compression region and a second lateral compression region located on the outer side of the first lateral compression region in the width direction. The area ratio of the compression portion in the second lateral compression region is higher than that in the first lateral compression region. Compared with the first lateral compression region, the second lateral compression region has a higher area ratio and higher stiffness. The second lateral compression region is located on the outer side of the absorbent core and is easily subjected to forces from the legs. Due to the higher stiffness of the second lateral compression region, deformation of the absorbent core due to forces from the legs can be suppressed. Forces from the legs can be transmitted to the central compression region located at the center of the absorbent core in the width direction, making it easy to deform into a convex shape with the central compression region as a base point. On the other hand, the first lateral compression region is located on the central side of the absorbent core in the width direction and is easily in contact with the discharge port. By making the stiffness of the first side compression area, which is more likely to come into contact with the discharge port, the fit can be further improved and discomfort during wear can be suppressed.

[0019] According to a preferred embodiment, based on the technical solutions of any one of embodiments 1 to 8, the technical solution of embodiment 9 can have the following features. The absorbent core has a low unit area weight portion, which is disposed on both sides of the central compression region in the width direction. The unit area weight of the absorbent material in the low unit area weight portion is smaller than the unit area weight of the surrounding absorbent material. The low unit area weight portion extends in the crotch region along the front-back direction. According to this embodiment, when the crotch region is clamped by the legs during wearing, causing the absorbent core to be subjected to a force towards the inside in the width direction, the absorbent core deforms with the central compression region and the low unit area weight portion as reference points. Both the central compression region and the low unit area weight portion extend in the front-back direction, constituting deformation reference points along the front-back direction. The central compression region clamped by the low unit area weight portion is easily deformed with the low unit area weight portions located on both sides of the central compression region as reference points, forming convex apexes. This further improves the fit of the absorbent core relative to the drainage opening.

[0020] According to a preferred embodiment, based on the technical solution of embodiment 9, the technical solution of embodiment 10 can have the following features. The low unit area weight portion is a convex shape that bulges outward from the center in the front-rear direction towards the outer side in the width direction of the low unit area weight portion. According to this embodiment, the portion of the low unit area weight portion that bulges outward from the center in the front-rear direction towards the outer side in the width direction is easily subjected to the force when clamped by the legs. The force is transmitted from the portion of the low unit area weight portion that bulges outward from the center in the front-rear direction towards the outer side in the width direction to the entire low unit area weight portion, and the portion clamped by the convex shapes of the low unit area weight portions on both sides easily bulges towards the skin. This makes it easier to achieve a convex deformation at the center of the absorbent core in the width direction.

[0021] According to a preferred embodiment, based on the technical solutions of embodiment 9 or 10, the technical solution of embodiment 11 may have the following features: The compression region has a lateral compression region located outside the central compression region in the width direction. At least partially, the low unit area weight portion overlaps with the lateral compression region. According to this embodiment, since the lateral compression region is provided overlapping with the low unit area weight portion, deformation around the low unit area weight portion is suppressed while deformation is achieved based on the low unit area weight portion, making it easier to maintain the convex shape at the center of the absorption core in the width direction.

[0022] (2) Implementation methods of absorbent articles The absorbent article according to the embodiments will be described below with reference to the accompanying drawings. Furthermore, in the following description of the drawings, the same or similar reference numerals are used to label the same or similar parts. However, it should be noted that the drawings are schematic, and the scale of each dimension may differ from reality. Therefore, the specific dimensions should be determined by referring to the following description. Additionally, the drawings may include parts with different dimensional relationships and scales.

[0023] Figure 1 This is a front view of the absorbent article 10 according to the embodiment. Figure 2 This is a top view of the unfolded state of absorbent item 10. Figure 1 The top view shown is an illustration of the absorbent article in its elongated state as observed from the skin side. Furthermore, in this invention, "elongated state" refers to the state in which the absorbent article 10 is elongated without forming wrinkles when the lateral joint 60 (described later) is unfolded. Additionally, in this invention, "natural state" refers to the state of the absorbent article after it has been removed from the packaging and placed in an atmosphere of 20°C ± 2°C and 60% ± 5% RH for 24 hours. Figure 3 It is along Figure 2 The cross-sectional view shown along line AA.

[0024] The absorbent article 10 can be any absorbent article that covers the wearer's waist, such as a disposable diaper. The absorbent article 10 can be either an underwear-type absorbent article or an open-type (belt-type) absorbent article. This embodiment is an underwear-type absorbent article. The absorbent article 10 has mutually orthogonal front-back direction L, width direction W, and thickness direction T. The front-back direction L is defined by directions extending towards the front and back of the body. In other words, the front-back direction L is the direction extending front-back in the unfolded absorbent article 10. Additionally, the absorbent article 10 has a thickness direction T that is orthogonal to both the front-back direction L and the width direction W. The thickness direction T extends towards the skin side T1 facing the wearer and the non-skin side T2 away from the wearer.

[0025] The absorbent article 10 has a crotch area S3, a front waist area S1 located forward of the crotch area S3, and a rear waist area S2 located rear of the crotch area S3. The front waist area S1 and the rear waist area S2 constitute a waist area covering the wearer's waist. The front waist area S1 is the area that contacts the wearer's abdomen. The rear waist area S2 is the area that contacts the wearer's back. The crotch area S3 is located in the wearer's crotch and is positioned between the front waist area S1 and the rear waist area S2.

[0026] The absorbent article 10 may be provided with a pair of side joints 60 that join the outer sides of the front waist region S1 and the rear waist region S2. The absorbent article 10 is folded with a crease FL located at the center of the absorbent article 10 in the front-rear direction L as the base point, and the side joints 60 are used to join the folded state to form an underwear shape. The crease FL extends in the width direction W and is a crease formed by folding the absorbent article 10 with the skin-side T1 of the absorbent article 10 facing each other. In this embodiment, the crease FL coincides with the center of the crotch region S3 in the front-rear direction L (hereinafter referred to as the crotch front-rear center S3CL). Alternatively, the side joints 60 may be defined by a portion that interlocks the outer sides of the front waist region S1 and the rear waist region S2, and extend in the front-rear direction L in the front waist region S1 and the rear waist region S2 respectively.

[0027] Here, in this invention, the outer portion is the part occupying a certain range in the width direction W, including the edge in the width direction W, and the outer edge is the edge in the width direction W. Furthermore, in this invention, the outer end edge is the edge located outside the front-rear direction L, and the inner end edge is the edge located inside the front-rear direction L. Figure 1 This indicates the state in which the side joint 60 is joined. Figure 2This indicates the state where the absorbent article 10 is unfolded by releasing the connection at the side joint 60. With the side joint 60 formed, the absorbent article 10 has a waist opening 62 for the wearer's torso to pass through and a pair of leg openings 66 for the wearer's legs to insert into. The waist opening 62 is defined by the front edge of the front waist region S1 and the rear edge of the rear waist region S2. Alternatively, the boundary between the front waist region S1 and the crotch region S3 may be defined by the rear edge of the side joint 60 in the front waist region S1, and the boundary between the rear waist region S2 and the crotch region S3 may be defined by the front edge of the side joint 60 in the rear waist region S2.

[0028] The absorbent article 10 has an absorbent core 50 disposed at least in the crotch region S3, and has absorbent material. The absorbent core 50 may, for example, contain pulverized pulp or superabsorbent polymer (SAP), or a mixture thereof. The absorbent core 50 is disposed at least in the crotch region S3. Preferably, the absorbent core 50 can extend from the front waist region S1 to the rear waist region S2 in the posterior-posterior direction L. The absorbent core 50 may be covered by a core sheath (not shown). Figure 4 As shown, the absorbent core 50 has a narrowing region 55 in the width direction W of the absorbent core 50, which shortens in length, between the front and rear ends of the absorbent core 50. The narrowing region 55 is located between the front maximum width portion 50FM, which is the longest in the width direction of the absorbent core 50 at the front end of the absorbent core 50, and the rear maximum width portion 50RM, which is the longest in the width direction of the absorbent core 50 at the rear end of the absorbent core 50. The narrowing region 55 may have a shortest width portion 55N, which is the shortest in the width direction of the absorbent core 50, and a widening region 56, which is located outside the front-rear direction L of the shortest width portion 55N, and the length of the absorbent core 50 in the width direction W increases outside the widening region 56 in the front-rear direction L.

[0029] The absorbent core 50 has a central region R51 located at the center of the absorbent core divided into five equal parts in the width direction at the center of the absorbent article 10 in the front-rear direction L, lateral regions R53 located on the sides of the five equal parts in the width direction, and an intermediate region R52 located between the central region R51 and the lateral regions R53. The intermediate region R52 is arranged on both sides of the central region R51, and the lateral regions R53 are arranged on both sides of the intermediate region R52. At the center of the absorbent article in the front-rear direction, the length of each region in the width direction is the same. However, in the embodiment with a narrowed region 55, the length of the outer end of the absorbent core 50 in the width direction W is longer than the length of the absorbent core 50 in the width direction W at the center of the absorbent core 50 in the front-rear direction L, so the length of each region in the width direction W at the outer end of the absorbent core 50 is different.

[0030] The absorbent article 10 may have an absorbent body 40. The absorbent body 40 may have an absorbent core 50, a liquid-permeable top sheet 41 covering the skin side T1 of the absorbent core 50, a liquid-impermeable bottom sheet 42 covering the non-skin side T2 of the absorbent core 50, and a non-skin side sheet 43 covering the non-skin side T2 of the bottom sheet 42. The absorbent body 40 may be disposed at least in the crotch region S3 and may extend to the front waist region S1 and the back waist region S2. The top sheet 41 and the non-skin side sheet 43 may be made of nonwoven fabric. The bottom sheet 42 may be made of a membrane. The absorbent body 40 may be separately constructed from the waist sheet disposed in the waist region.

[0031] The absorbent article 10 has an outer body 30 located on the non-skin side T2 of the absorbent body 40, covering the wearer's waist in the rear waist region S2 and the front waist region S1. The outer body 30 may be positioned at least in the rear waist region S2 and the front waist region S1, or it may be positioned across the crotch region S3. The outer body has multiple waist panels. Each waist panel is a sheet of material other than the absorbent body 40, positioned in the waist region. Each waist panel may have a first waist panel 35 and a second waist panel 36 positioned on the non-skin side T2 of the first waist panel 35. Both the first waist panel 35 and the second waist panel 36 may be made of non-woven fabric. The second waist piece 36 may have: a non-folded portion 361 located on the non-skin side T2 of the first waist piece 35; and a folded portion 362 folded back towards the skin side T1 with the waist opening 62 (the front edge of the front waist region S1 and the rear edge of the rear waist region S2) as the base point. The folded portion 362 of the second waist piece 36 may be disposed on the skin side T1 of the first waist piece 35 and the absorbent body 40.

[0032] like Figure 3 As shown, the absorbent article 10 includes: a front joining region R31 that joins the outer body 30 and the absorbent body 40 on the front waist region S1 side; and a rear joining region R32 that joins the outer body 30 and the absorbent body 40 on the rear waist region S2 side. The front joining region R31 and the rear joining region R32 are located on the non-skin side of the absorbent body 40. The front joining region R31 and the rear joining region R32 can be separated in the front-back direction L and extend along the width direction W.

[0033] The outer body 30 may have a waist elastic member that can stretch and contract in the width direction W. The waist elastic member may be composed of an elastic cord that can stretch and contract in the width direction W or an elastic sheet that can stretch and contract in the width direction W. In this embodiment, the waist elastic member may be composed of an elastic cord, and multiple waist elastic members may be arranged at intervals in the front waist region S1 and the rear waist region S2 in the front-rear direction L. The waist elastic member may be arranged across the waist region and the crotch region as long as it is arranged at least in the waist region. In this embodiment, the waist elastic member is arranged across the rear waist region S2 and the crotch region S3, and has a leg elastic member 38 arranged along the leg opening 66. The leg elastic member 38 bends from the outer side of the rear waist region S2 in the width direction toward the inner side in the width direction W and toward the inner side in the front-rear direction (crotch region side). Three leg elastic members 38 are provided in the rear waist region S2.

[0034] The waist elastic member may include: a front continuous elastic member 31, which is continuously arranged from one end to the other in the width direction of the front waist region S1 and extends and retracts in the width direction; and a rear continuous elastic member 32, which is continuously arranged from one end to the other in the width direction W of the rear waist region S2 and extends and retracts in the width direction. In this embodiment, all waist elastic members (including the leg circumference elastic member 38) are continuous elastic members.

[0035] Figure 4 This is a top view of the absorber core 50. Figure 5 and Figure 6 yes Figure 4 The cross-sectional view of the absorber core 50 shown. Figure 5 This is a cross-sectional view of the absorber core 50 in its elongated state. Figure 6 Therefore Figure 4 The line shown is a cross-section of the wearing state, with the reference cross-section as the reference. Figure 5 (A) and Figure 6 (A) is based on Figure 4 The BB line shown is the baseline of the sectional view. Figure 5 (B) and Figure 6 (B) is a sectional view based on the CC line. Figure 7 yes Figure 4 An enlarged top view of section D shown.

[0036] The absorbent article 10 has a compression region, which is configured with a compression portion formed by compressing the absorbent core 50 in the thickness direction T. The compression portion may compress only the absorbent core 50, or it may compress the core sheath together with the absorbent core 50. For convenience, the compression portion is shown as a blacked-out area in the cross-sectional view, but in the actual product, the compression portion is an area where the absorbent material is compressed and recessed in the thickness direction. The compression region is a region where compression portions are configured, and it is a certain range of regions containing compression portions with a certain pattern. In the compression region, a single compression portion (e.g., a continuous linear compression portion) may be configured, or an assembly of multiple compression portions (e.g., a grid-like assembly of compression portions described later) may be configured. The compression region has a central compression region R81 extending in the front-rear direction L in the central region R51. A central compression portion 81 is configured in the central compression region R81.

[0037] The central compression region R81 can be either a region with a central compression section 81 extending along the front-rear direction L, or a region where multiple central compression sections 81 (e.g., dot-shaped, wavy, or linear) are arranged along the front-rear direction L. The shape extending along the front-rear direction can be a straight line along the front-rear direction L, or a wavy shape or the like, having a portion inclined relative to the front-rear direction L but extending along the front-rear direction as a whole. Furthermore, the shape extending along the front-rear direction can be not only a structure parallel to the front-rear direction L, but also a structure slightly inclined relative to the front-rear direction (e.g., less than 10 degrees, suitably less than 5 degrees).

[0038] The absorbent article 10 of this embodiment is configured to improve fit relative to the excretory opening, thereby suppressing discomfort during wear. There are generally two structures for improving fit relative to the excretory opening and thus suppressing discomfort during wear. First, the first type will be described in detail. In the first type, the central compression region R81 can extend in a straight line across the front and rear center S3CL of the crotch. The central compression portion 81 of the first type can be a straight line extending parallel to the front-rear direction L. The straight compression portion can be continuous or arranged in a point-like and intermittent manner. However, in order to prevent the force from being interrupted between compression portions, the spacing between the point-like and intermittently arranged compression portions is preferably 5 mm or less. Figure 7 As shown, the central compression region R81 in this embodiment is a region in which a continuous, straight central compression section 81 extending parallel to the front-rear direction is disposed, and is a region sandwiched between the outer edges of the two sides of the central compression section 81.

[0039] According to the first method, the central compression region R81 is located in the central region R51, which is situated at the center of the absorbent core 50 in the width direction W, and serves as the deformation base point of the absorbent core 50 within the central region R51. The crotch region S3 is clamped by the legs during wear and is easily subjected to a force towards the inside in the width direction W. This force presses the crotch region S3 inward in the width direction W, making it easily deformable with the central compression region R81 as the base point. The central region R51 deforms into a convex shape with the central compression region R81 as the base point within a certain range extending linearly in the front-back direction L. This improves the fit of the absorbent core 50 relative to the drainage opening and suppresses discomfort during wear.

[0040] In the second method, the length of the central compression region R81 in the width direction W is less than 10% of the length of the absorbent core 50 in the width direction at the center S3CL of the crotch. In the variation of the length of the central compression region R81 in the width direction W, it is sufficient that the maximum length of the central compression region R81 in the width direction is less than 10% of the length of the absorbent core 50 in the width direction at the center S3CL of the crotch. According to the second method, the central compression region R81 becomes the deformation base point of the absorbent core 50 in the central region R51 located at the center of the absorbent core 50 in the width direction W. The crotch area S3 is clamped by the legs during wear and is easily subjected to a force towards the inside in the width direction W. Using this force to press the crotch area S3 inward in the width direction, it is easy to deform with the central compression region R81 as the base point. By deforming into a convex shape with the central compression region R81 as the base point, the fit of the absorbent core relative to the drainage opening can be improved, suppressing discomfort during wear. Furthermore, the central compression region R81 occupies a relatively narrow area relative to the entire width W of the absorbent core 50. Therefore, force is easily concentrated in the central compression region R81, allowing for easy convex deformation of the absorbent core 50. Additionally, the narrow size of the central compression region R81 relative to the entire width W of the absorbent core 50 allows for the setting of deformation base points while suppressing the area of ​​the central compression region R81. Since convex deformation can be achieved while suppressing the area of ​​the region hardened by the central compression portion 81, the contact with the skin is soft, reducing discomfort during wear and improving the fit of the absorbent core relative to the drainage opening.

[0041] The absorbent article of the first type can also have the structure of the second type, and the absorbent article of the second type can also have the structure of the first type. That is, the length of the central compression region R81 in the width direction in the first type can be less than 10% of the length of the absorbent core in the width direction at the front-back center S3CL of the crotch, and the central compression region R81 in the second type can also extend in a straight line across the center of the front-back direction of the crotch region S3. The suitable method in the first type and the second type will be described below.

[0042] The absorbent item can be an underwear-type absorbent item 10. When wearing the underwear-type absorbent item 10, the absorbent item 10 is lifted by passing the leg through the leg opening 66. Therefore, the outer part of the absorbent core 50 in the crotch area S3 is easy to contact the leg and not easy to lift. Therefore, during wearing, the center of the absorbent core 50 in the width direction W (e.g., the central area R51) is easier to lift upward than the outer part of the absorbent core 50 (e.g., the lateral area R53), and the central compression area R81 is easier to deform into a convex shape towards the skin side T1. Therefore, the central compression area R81 is easier to deform into a convex shape towards the skin side, which can further improve the fit relative to the excretion opening.

[0043] The length of the central compression region R81 in the width direction W can be less than 10% of the length of the absorbent core in the width direction at the front and rear center S3CL of the crotch, preferably less than 4%, and more preferably less than 2.5%. Additionally, the length of the central compression region R81 in the width direction can be more than 1.5% of the length of the absorbent core in the width direction at the front and rear center S3CL of the crotch. The length of the central compression region R81 in the width direction can be more than 1 mm and less than 10 mm, preferably more than 1 mm and less than 3 mm. The central compression region R81 can be disposed only in the central region R51 and not across the intermediate region R52.

[0044] The central compression region R81 can be configured at least in the crotch region S3, spanning the front and rear centers S3CL of the crotch. Alternatively, multiple central compression regions R81 can be configured, broken in the front-rear direction L, for example, respectively configured on the front and rear sides of the front and rear centers S3CL of the crotch. The length of the central compression region R81 in the front-rear direction L can be more than 50% of the length of the crotch region S3 in the front-rear direction L. The central compression region R81 can be configured over the entire area of ​​the narrowed region 55, which is easily pressed inwards by the leg in the width direction. Suitably, the central compression region R81 can be continuous from the front edge to the rear edge of the absorber core 50. According to this structure, deformation based on the central compression region R81 can be formed over the entire area of ​​the absorber core 50 in the front-rear direction L.

[0045] The central compression portion 81, located in the central compression region R81, is recessed from the non-skin side T2 of the absorbent core 50 toward the skin side T1. That is, the central compression portion 81 is formed by pressing the surface of the non-skin side T2 of the absorbent core 50 toward the skin side T1. Because the central compression portion 81 is recessed from the non-skin side T2 of the absorbent core 50 toward the skin side T1, the density of the skin-side region of the absorbent core increases and the density of the non-skin-side region of the absorbent core 50 decreases in the portion where the central compression portion 81 is located. Furthermore, because the non-skin-side region of the absorbent core 50 is recessed in the portion where the central compression portion 81 is located, the non-skin-side region of the absorbent core 50 easily moves inward in the width direction W when pressed by a leg or similar object. Therefore, the absorbent core 50 easily deforms into a convex shape toward the skin side T1 with the central compression region R81 as a base point, further improving its fit relative to the discharge opening.

[0046] The central compression region R81 can overlap with both the front joining region R31, which joins the outer garment 30 and the absorbent body 40 on the front waist region S1 side, and the rear joining region R32, which joins the outer garment 30 and the absorbent body 40 on the rear waist region S2 side. According to this method, since the central compression region R81 is arranged to overlap with the front joining region R31 and the rear joining region R32, it is easy to form a convex deformation with the central compression region R81 as the base point over a large area from the crotch region S3 to the waist region. Furthermore, the outer garment 30 conforms to the wearer's waist using a waist elastic member or the like. The convex deformable portion with the central compression region R81 as the base point is lifted via the front joining region R31 and the rear joining region R32, facilitating continuous contact with the body.

[0047] At least a portion of the rear continuous elastic member 32 can be configured to overlap at least a portion of the central compression region R81. The rear continuous elastic member 32 can improve the fit of the absorbent core 50, suppress downward displacement of the absorbent core 50, and continuously position the convex deformable portion relative to the body. Furthermore, the contraction of the rear continuous elastic member 32 can further conform the rear end of the absorbent core 50 to the waist. Similarly, at least a portion of the front continuous elastic member 31 can be configured to overlap at least a portion of the central compression region R81. The front continuous elastic member 31 can improve the fit of the absorbent core 50, suppress downward displacement of the absorbent core 50, and continuously position the convex deformable portion relative to the body. Furthermore, the contraction of the front continuous elastic member 31 can further conform the front end of the absorbent core 50 to the waist.

[0048] The compression region may include a lateral compression region R82 located outside the central compression region R81 in the width direction W. The lateral compression region R82 is the region where the lateral compression portions 82 are disposed; in this embodiment, it is the region where the first lateral compression region R821 and the second lateral compression region R822 are combined. In this embodiment, the width direction of the first lateral compression region R821 is the range enclosed by the outer edges of both sides of the grid-shaped first lateral compression portions 821. The front-rear direction of the first lateral compression region R821 is the range enclosed by the outer end edges of both sides of the grid-shaped first lateral compression portions 821; since the first lateral compression portions 821 are disposed at the two outer end edges of the absorbent core, it is the range enclosed by the front and rear end edges of the absorbent core. Similarly, the front-to-back range of the second lateral compression region R822 is the range sandwiched between the outer edges of the two sides of the grid-shaped second lateral compression section 822. Since the second lateral compression section 822 is disposed at the two outer edges of the absorption core, it is the range sandwiched between the front edge and the rear edge of the absorption core.

[0049] The shape of the lateral compression portion 82 can be different from that of the central compression portion 81. Furthermore, the area ratio of the compression portion 82 in the lateral compression region R82 can be different from the area ratio of the compression portion 81 in the central compression region R81. Moreover, the area ratio of the compression portion is the ratio of the area in which the compression portion is disposed. When calculating the area ratio of the compression portion, the area of ​​the compression region (the entire area surrounding the compression portion) and the compression portion (the area of ​​only the compressed part) can be measured, and the ratio can be calculated by dividing the area of ​​the compression portion by the area of ​​the compression region. When comparing the area ratio, the area of ​​the skin-side surface of the absorbent core can be measured and the ratio of that surface can be compared, or the area of ​​the non-skin-side surface of the absorbent core can be measured and the ratio of that surface can be compared. Furthermore, the lateral compression region R82 can be connected to the central compression region R81, or, as in this embodiment, it can be separated from the central compression region R81 in the width direction W. The lateral compression portion 82 can be recessed from the skin-side T1 of the absorbent core 50 towards the non-skin-side T2, or, as in this embodiment, it can be recessed from the non-skin-side T2 of the absorbent core 50 towards the skin-side T1.

[0050] The length of the lateral compression region R82 in the width direction W can be longer than the length of the central compression region R81 in the width direction W. Since the longer lateral compression region R82 is located to the side of the central compression region R81, the shorter central compression region R81 can easily function as a deformation base point for forming a convex apex, thus facilitating the realization of the convex shape of the absorption core 50. Furthermore, by using the wider lateral compression region R82 to support the deformation of the central compression region R81, it is easier to maintain the convex deformation of the absorption core 50. The lateral compression region R82 can be disposed in at least one of the lateral region R53 and the central region R52, or it can be disposed in the central region R51.

[0051] The area ratio of the central compression portion 81 in the central compression region R81 can be higher than the area ratio of the side compression portions 82 in the side compression regions R82. In the case of multiple side compression regions, the area ratio of any one of the side compression regions is used for comparison. That is, the area ratio of the central compression portion 81 may be higher than at least one of the area ratios of the first side compression portion 821 and the second side compression portion 822; suitably, the area ratio of the central compression portion 81 may be higher than both the area ratio of the first side compression portion 821 and the area ratio of the second side compression portion 822.

[0052] The lateral compression section 82, located in the lateral compression region R82, appears as a lattice when viewed from above. The lattice can be formed by continuous intersecting straight lines, or by arranging discontinuously arranged lines (including straight lines and curves) in two intersecting directions. In this embodiment, the lateral compression section 82 is composed of multiple compression sections of discontinuously arranged curves and straight lines, arranged in a wavy pattern extending in the front-rear direction, and combined to form a lattice-shaped compression section. Because the lateral compression section 82 is lattice-shaped, it extends both in the front-rear direction L and the width direction W, making it easier for the absorber core 50 to deform in a planar shape rather than a linear shape. By utilizing the planar deformation of the lattice-shaped lateral compression section 82 in the lateral compression region R82, it is easier to continuously support the convex deformation of the central compression region R81 from the side.

[0053] The lateral compression region R82 only needs to be disposed to the side of at least a partial area of ​​the central compression region R81 in the front-rear direction L. However, in order to maintain the convex deformation achieved by the central compression region R81 in the crotch region S3, it is preferable that the lateral compression region R82 is disposed to the side of at least the entire area of ​​the crotch region S3 in the front-rear direction L. In addition, in order for the lateral compression region R82 to support the convex deformation achieved by the central compression region R81, it is suitable that the lateral compression region R82 is disposed to the side of the entire area of ​​the central compression region R81 in the front-rear direction L. In this embodiment, the central compression region R81 is disposed to the entire area of ​​the absorber core 50 in the front-rear direction L, and the lateral compression region R82 is also disposed to the entire area of ​​the absorber core 50 in the front-rear direction L.

[0054] The lateral compression region R82 may have a first lateral compression region R821 and a second lateral compression region R822 located outside the first lateral compression region R821 in the width direction W. The lateral compression portion 82 may have a first lateral compression portion 821 disposed on the first lateral compression region R821 and a second lateral compression portion 822 disposed on the second lateral compression portion 822. The shape of the first lateral compression portion 821 may be different from that of the second lateral compression portion 822. In addition, the area ratio of the first lateral compression portion 821 may be different from that of the second lateral compression portion 822. The first lateral compression region R821 may be connected to the second lateral compression region R822, or it may be separated from the second lateral compression region R822 in the width direction W, as in this embodiment. By setting the first lateral compression region R821 and the second lateral compression region R822, different deformation base points are formed in each region, allowing each region to deform into different shapes. Therefore, compared to a structure where the entire absorbent core 50 deforms into a uniform shape, each region can deform into its own shape, making it easier to achieve complex deformations that fit the body more closely. In this embodiment, the first lateral compression region R821 and the second lateral compression region R822 are separated in the width direction W. The stiffness of this separated region is lower than that of the surrounding area (the first lateral compression region R821 and the second lateral compression region R822), making it easier to become a deformation base point. The region between the central compression region R81 and the first lateral compression region R821 and the second lateral compression region R822 becomes a deformation base point, and the absorbent core 50 deforms into... Figure 6 The letter W is shown in the image.

[0055] The area ratio of the second side compression portion 822 in the second side compression region R822 can be higher than the area ratio of the first side compression portion 821 in the first side compression region R821. Compared with the first side compression region R821, the second side compression region R822 has a higher area ratio of compression portion and higher rigidity. The second side compression region R822 is located on the outer side of the absorbent core and is easily subjected to forces from the legs. Due to the higher rigidity of the second side compression region R822, it can suppress the deformation of the absorbent core 50 due to forces from the legs. The force from the legs can be transmitted to the central compression region R81 located in the center of the width direction of the absorbent core, and it is easy to deform into a convex shape with the central compression region R81 as the base point. The first side compression region R821 is located on the central side of the width direction W of the absorbent core 50 and is easy to contact the discharge port. By making the stiffness of the first lateral compression area R821, which is prone to contact with the discharge port, lower stiffness can be achieved, thereby further improving fit and suppressing discomfort when wearing the garment.

[0056] The lengths of the first lateral compression region R821 and the second lateral compression region R822 in the width direction W can be longer than the length of the central compression region R81 in the width direction W. Furthermore, the length of the second lateral compression region R822 in the width direction W can be longer than the length of the first lateral compression region R821 in the width direction W. By making the length of the second lateral compression region R822 in the width direction W longer, it is easier to transmit the force from the leg to the central side of the absorption core 50 in the width direction. In a modified example, the length of the first lateral compression region R821 in the width direction W can be longer than the length of the second lateral compression region R822 in the width direction W. By making the length of the first lateral compression region R821 in the width direction W longer, it is easier to obtain the effect of supporting the convex deformation of the central compression region R81. Furthermore, in the crotch region S3, in order to achieve the aforementioned W-shaped deformation, the length in the width direction of the compression region at the front and rear center S3CL of the crotch can be more than 90% of the entire width direction of the absorption core 50 at the front and rear center S3CL of the crotch. The length in the width direction of the compression region at the front and rear center S3CL of the crotch is obtained by adding the length in the width direction of the central compression region at the front and rear center S3CL of the crotch and the length in the width direction of the lateral compression regions at the front and rear center S3CL of the crotch. In this embodiment, the first lateral compression region R821 is arranged across the central region R51 and the middle region R52, and the second lateral compression region R822 is arranged across the middle region R52 and the lateral region R53.

[0057] The second lateral compression region R822 can be positioned near the outer edge of the absorbent core 50 at the center S3CL of the crotch. More specifically, the distance between the second lateral compression region R822 and the outer edge of the absorbent core 50 can be 5 mm or less. According to this structure, when a force from the leg is applied in the crotch region S3, the force can be transmitted to the center of the absorbent core 50 while maintaining the shape of the second lateral compression region R822. Furthermore, in embodiments with a narrowed region 55 as described in this embodiment, the compression portion may not be positioned on the outer side of the absorbent core at the rear maximum width portion 50RM, nor on the outer side of the absorbent core 50 at the front maximum width portion 50FM. The outer side of the absorbent core 50 at the front maximum width portion 50FM easily contacts the groin area, and the outer side of the absorbent core 50 at the rear maximum width portion 50RM easily contacts the bulge of the buttocks. By omitting the compression portion in the areas that contact the groin and buttocks, the increase in stiffness in these areas can be suppressed, improving the wearing comfort.

[0058] The absorbent core 50 may have a low unit area weight portion 51, which is disposed on both sides in the width direction W relative to the central compression region R81. The unit area weight of the absorbent material in the low unit area weight portion 51 is smaller than that of the surrounding absorbent material. The low unit area weight portion 51 is the portion where the unit area weight of the absorbent material is lower than that of the surrounding area (e.g., adjacent areas in the width direction W or adjacent areas in the front-back direction L). Absorbent material may or may not be disposed in the low unit area weight portion 51 (so-called slit). In this embodiment, the low unit area weight portion 51 is formed by a slit and is formed over the entire area in the thickness direction T of the absorbent core 50. According to the low unit area weight portion formed by the slit, it is easy to function as a deformation base point of the absorbent core 50. On the other hand, according to the low unit area weight portion disposed with absorbent material, the shape of the low unit area weight portion is not easily deformed when absorbing body fluid, and the deformation state of the absorbent core is easily maintained even during long-term use. Furthermore, based on the low unit area weight portion equipped with absorbent material, the absorbent material disposed in the low unit area weight portion can also be used to diffuse body fluids, thereby improving the fluid diffusivity without interruption. The width of the low unit area weight portion (the length in the direction orthogonal to the direction in which the low unit area weight portion extends) is not limited, but can be, for example, 3 mm or more, preferably 5 mm or more, and more preferably the thickness of the absorbent core 50 or more.

[0059] The low-weight-per-unit-area portions 51 extend along the front-to-back direction L in the crotch region S3 on both sides of the width direction W relative to the central compression region R81. When the crotch region S3 is clamped by the legs during wear and subjected to an inward force toward the width direction W, the absorbent core 50 deforms with the central compression region R81 and the low-weight-per-unit-area portions 51 as base points. Both the central compression region R81 and the low-weight-per-unit-area portions 51 extend along the front-to-back direction L, forming deformation base points along the front-to-back direction L. The central compression region R81, clamped by the low-weight-per-unit-area portions 51, easily deforms as convex apexes with the low-weight-per-unit-area portions 51 located on both sides of the central compression region R81 as base points. This further improves the fit of the absorbent core 50 relative to the discharge opening. In the configuration with a pair of low-weight-per-unit-area portions 51, the low-weight-per-unit-area portions 51 have lower stiffness and are more likely to become deformation base points. With the central compression region R81 and the low-weight-per-unit-area portions 51 as deformation base points, the absorbent core 50 deforms into Figure 6 The shape is W, as shown. Furthermore, in this embodiment, a low-weight-per-unit-area section 51 is arranged at the center S3CL of the lower crotch, in the area between the first lateral compression region R821 and the second lateral compression region R822, making it easier to function as a deformation base point.

[0060] The low-weight-per-unit-area section 51 can span the front and rear center S3CL of the crotch. According to this structure, since the low-weight-per-unit-area section 51 is located across the front and rear center S3CL of the crotch, which is easily subjected to leg forces, the low-weight-per-unit-area section 51 is easily deformed by forces. Furthermore, the low-weight-per-unit-area section 51 can be positioned at the shortest width portion 55N. According to this structure, since the low-weight-per-unit-area section 51 is located at the shortest width portion 55N, which is easily subjected to leg forces, the low-weight-per-unit-area section 51 is easily deformed by forces.

[0061] The low-weight-per-unit-area section 51 can be a convex shape that bulges outward from the center in the front-rear direction L towards the outside in the width direction W. The portion of the low-weight-per-unit-area section 51 that bulges outward from the center in the front-rear direction L towards the outside in the width direction W is easily subjected to the force when clamped by the legs. This force is transmitted from the portion of the low-weight-per-unit-area section 51 that bulges outward from the center in the front-rear direction L towards the outside in the width direction W to the entire low-weight-per-unit-area section 51, and the portion clamped by the convex shapes of the low-weight-per-unit-area sections 51 on both sides easily bulges towards the skin side T1. This makes it easier to achieve a convex deformation at the center of the absorbent core in the width direction.

[0062] Furthermore, in a modified example, the low unit area weight portion 51 may also be a straight line along the front-rear direction L. Additionally, the length of the low unit area weight portion 51 in the front-rear direction L may be shorter than the length of the central compression region R81 in the front-rear direction L. The low unit area weight portion 51 may be disposed only within the narrowing region 55. That is, the low unit area weight portion 51 may not be disposed in the rear maximum width portion 50RM, or it may not be disposed in the front maximum width portion 50FM. In this embodiment, the front edge of the low unit area weight portion 51 is located in the widened region 56, which is positioned forward of the shortest width portion 55N, and the rear edge of the low unit area weight portion 51 is located in the widened region 56, which is positioned rearward of the shortest width portion 55N.

[0063] At least a portion of the low unit area weight portion 51 can overlap with the lateral compression region R82. The central compression region sandwiched by the low unit area weight portion 51 is easily deformed with the low unit area weight portion 51 located on both sides of the central compression region R81 as the base point, forming a convex apex. At this time, since the lateral compression region R82 is provided overlapping with the low unit area weight portion 51, deformation around the low unit area weight portion 51 is suppressed while deformation based on the low unit area weight portion 51 is realized, making it easier to maintain the convex shape at the center of the width direction of the absorption core 50. The low unit area weight portion 51 can overlap with either the first lateral compression region R821 or the second lateral compression region R822. In this embodiment, the low unit area weight portion 51 overlaps with both the first lateral compression region R821 and the second lateral compression region R822. Therefore, the low unit area weight part 51, the first lateral compression region R821 and the second lateral compression region R822 are easily linked together, and as a whole, the desired deformation state of the absorption core can be achieved.

[0064] Alternatively, a second low-weight-per-unit-area section 52, positioned forward of the pair of low-weight-per-unit-area sections 51 and arranged separately from them, can be provided. The second low-weight-per-unit-area section 52 is positioned across the center of the absorbent core 50 in the width direction. By utilizing this second low-weight-per-unit-area section 52, deformation based on the pair of low-weight-per-unit-area sections 51 is interrupted, and the forward transmission of deformation can be suppressed. This facilitates the arrangement of the front end of the absorbent core 50 in a planar shape that covers the abdomen.

[0065] The present invention has been described in detail above using the embodiments described herein. However, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes and is not intended to be restrictive. The absorbent article of this embodiment can be suitably applied to absorbent articles intended for absorbing small amounts of urine. For example, in absorbent articles intended for absorbing large amounts of urine, there are absorbent articles in which the absorbent core is disposed separately from the body to form a space for collecting excrement. However, in absorbent articles intended for absorbing small amounts of urine, a space for collecting excrement is not necessarily required, and there are often cases where the absorbent core is disposed close to the excretion opening for rapid urine absorption or to improve wearing comfort. Therefore, the absorbent article of this embodiment can be suitably applied to absorbent articles intended for absorbing small amounts of urine.

[0066] Furthermore, the entire contents of Japanese Patent Application No. 2024-030792, filed on February 29, 2024, are incorporated herein by reference. Industrial availability

[0067] According to the present invention, an absorbent article is provided that can improve the fit relative to the discharge opening, thereby suppressing discomfort when wearing. Explanation of reference numerals in the attached figures

[0068] 10. Absorbent material; 30. Outer body; 40. Absorbent main body; 50. Absorbent core; 51. Low weight per unit area; 81. Central compression section (compression section); 82. Lateral compression section (compression section); L, front-back direction; R31, front joint area; R32, rear joint area; R51, central area; R81, central compression area; R82, lateral compression area; R821, first lateral compression area; R822, second lateral compression area; S1, front waist area; S2, back waist area; S3, crotch area; S3CL, front and back center of crotch; T, thickness direction; T1, skin side; T2, non-skin side; W, width direction.

Claims

1. An absorbent article having: The front-to-back direction, width direction, and thickness direction are mutually orthogonal; It includes the central crotch area in the front-back direction, the front waist area located in front of the crotch area, and the rear waist area located in rear of the crotch area. An absorbent core, which is disposed at least in the crotch region, has absorbent material; as well as A compression region, which is configured with at least a compression section that compresses the absorbent core in the thickness direction, wherein, The compression region has a central region located in the center of the region obtained by dividing the absorbent core into five equal parts in the width direction, and this central compression region extends along the front-back direction. The central compression region extends in a straight line across the center of the crotch region in the front-back direction.

2. An absorbent article having: The front-to-back direction, width direction, and thickness direction are mutually orthogonal; It includes the central crotch area in the front-back direction, the front waist area located in front of the crotch area, and the rear waist area located in rear of the crotch area. An absorbent core, which is disposed at least in the crotch region, has absorbent material; as well as A compression region, which is configured with at least a compression section that compresses the absorbent core in the thickness direction, wherein, The compression region has a central region located in the center of the region obtained by dividing the absorbent core into five equal parts in the width direction, and this central compression region extends along the front-back direction. The length of the central compression region in the width direction is less than 10% of the length of the absorbent core in the width direction at the center of the crotch region in the front-back direction.

3. The absorbent article according to claim 1 or 2, wherein, This absorbent article has: An absorbent body having the absorbent core, a liquid-permeable top sheet covering the skin side of the absorbent core, and a liquid-impermeable bottom sheet covering the non-skin side of the absorbent core; as well as The outer garment, positioned on the non-skin side compared to the absorbent body, covers the wearer's waist in the rear and front waist regions. The central compression region overlaps with the front joining region on the front waist region side where the outer body and the absorbent body are joined, and the rear joining region on the rear waist region side where the outer body and the absorbent body are joined.

4. The absorbent article according to claim 1 or 2, wherein, The central compression region is continuous from the front edge to the rear edge of the absorber core.

5. The absorbent article according to claim 1 or 2, wherein, The compression portion of the central compression region is recessed from the non-skin side of the absorbent core toward the skin side.

6. The absorbent article according to claim 1 or 2, wherein, The compression region has a lateral compression region located on the outer side of the central compression region in the width direction. The length of the lateral compression region in the width direction is longer than the length of the central compression region in the width direction.

7. The absorbent article according to claim 6, wherein, The compression section disposed in the lateral compression region appears as a grid when viewed from above.

8. The absorbent article according to claim 6, wherein, The lateral compression region has a first lateral compression region and a second lateral compression region located outside the first lateral compression region in the width direction. The area ratio of the compression portion in the second side compression region is higher than that in the first side compression region.

9. The absorbent article according to claim 1 or 2, wherein, The absorbent core has low-weight-per-unit-area sections disposed on both sides of the width direction relative to the central compression region, wherein the absorbent material in the low-weight-per-unit-area sections has a lower weight per unit area than the surrounding absorbent material. The low-weight portion per unit area extends in the crotch region along the front-back direction.

10. The absorbent article according to claim 9, wherein, The low unit area weight portion is a convex shape that bulges outward from the center in the front-back direction in the width direction of the low unit area weight portion.

11. The absorbent article according to claim 9, wherein, The compression region has a lateral compression region located on the outer side of the central compression region in the width direction. At least a portion of the low unit area weight portion overlaps with the lateral compression region.

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