JP6725488B2 - Absorbent article - Google Patents

Description

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

Patent Document 1 discloses an absorbent article having an absorbent core provided with a plurality of recesses. The absorbent core of Patent Document 1 is provided with a plurality of recesses extending in the front-rear direction and a plurality of recesses extending in the width direction. A small absorption portion is provided between the concave portions. The concave portion and the small absorption portion are provided on the skin facing surface side of the absorption core.

JP, 2015-97715, A

In the absorbent article of Patent Document 1, the body fluid discharged from the wearer is guided to the concave portion and the small absorption portion provided in the region facing the excretion opening. The body fluid is absorbed by the small absorption section and is guided to the outer side in the width direction and the outer side in the front-rear direction by the recess. The recess reaches the outer edge in the width direction and the outer edge in the front-rear direction of the absorbent core on the skin-facing surface side of the absorbent core. Therefore, the body fluid discharged from the wearer may be diffused throughout the absorbent core on the skin-facing surface side of the absorbent core before being guided to the non-skin-facing surface side of the absorbent core, possibly causing leakage of body fluid. ..

Therefore, an absorbent article that easily guides body fluid to the entire absorbent core while suppressing leakage of body fluid is desired.

The absorbent article according to one aspect includes a central region including an excretory opening contact portion that faces an excretory opening of a wearer, a surface sheet, an absorbent core arranged on a non-skin facing surface side of the surface sheet, and An absorbent article having a topsheet and an opening extending in the thickness direction across the absorbent core, wherein the absorbent core has a recessed portion in the thickness direction on a non-skin-facing surface of the absorbent core. The opening is provided at least in the central region, at least a portion of the recess is located outside the opening in plan view, and toward the outer edge of the absorbent core. It is extended.

FIG. 1 is a plan view of the absorbent article according to the embodiment viewed from the skin facing surface side. FIG. 2 is a sectional view taken along the line AA shown in FIG. FIG. 3 is a cross-sectional view taken along the line BB shown in FIG. FIG. 4 is a diagram schematically showing how the body fluid of the absorbent core diffuses. FIG. 5 is a schematic enlarged view of the topsheet.

(1) Outline of Embodiments At least the following matters will be made clear by the present specification and the description of the accompanying drawings.

The absorbent article according to one aspect includes a front-rear direction, a width direction orthogonal to the front-rear direction, a central region including an excretory opening abutting portion facing a wearer's excretory opening, a surface sheet, and the surface sheet. An absorbent article having an absorbent core arranged on the non-skin facing surface side, an opening extending in the thickness direction across the surface sheet and the absorbent core, wherein the absorbent core is the absorbent core. A recessed portion that is recessed in the thickness direction is provided on the non-skin facing surface of the core, the opening portion is disposed at least in the central region, and at least a portion of the recessed portion is more than the opening portion in plan view. It is located outside and extends towards the outer edge of the absorbent core.

According to a preferred aspect, the opening reaches the non-skin-facing surface of the absorbent core.

The opening makes it easier to guide the body fluid to the non-skin-facing surface of the absorbent core, and can further suppress the diffusion of the body fluid on the skin-facing surface side of the absorbent core.

According to a preferred aspect, at least a part of the peripheral portion surrounding the opening is not provided with a crimping portion to which the fibers constituting the surface sheet and the absorbent core are crimped.

When the pressure-bonded portion is formed on the entire periphery of the opening, the body fluid guided to the opening is drawn into the pressure-bonded portion and easily diffuses in the plane direction around the entire circumference of the opening. Since the pressure-bonded portion is not formed on the entire peripheral portion, the body fluid guided to the opening portion is more likely to diffuse in the thickness direction than in the plane direction. Therefore, the body fluid can be guided to the non-skin facing surface side of the absorbent core on the non-skin facing surface side.

According to a preferred aspect, the recess includes a width recess extending in the width direction, and the width recesses are provided in plural at intervals in the front-rear direction.

Since the plurality of width recesses are arranged at intervals in the front-rear direction, the absorbent core is easily arranged along the roundness of the body by the plurality of folding base points spaced at the front-rear direction. By disposing the absorbent core along the body, it is easier to obtain the effect of absorbing the body fluid by the central region of the absorbent core and diffusing the body fluid by the opening and the recess.

According to a preferred aspect, the central region is a first central region located at the center of the central region in the width direction, and a pair of second central regions located on both sides in the width direction with respect to the first central region. And, the opening is provided in the first central region, the width concave portion is provided in each of the pair of second central regions, the width concave portion, The absorbent cores are arranged symmetrically with respect to a width center line extending in the front-rear direction and passing through the center in the width direction.

The body fluid discharged to the first central region can be guided to the non-skin facing surface side, and can be guided from the first central region to the second central region side on the non-skin facing surface side of the absorbent core. In addition, since the width recesses are symmetrical, a folding base point that connects the width recesses is formed, and the entire width direction of the absorbent core can more easily follow the body. One of the width recesses in the second central region and the other width recess in the second central region are deformed in the same direction, and their positions in the front-rear direction are aligned, so that the recesses cooperate with each other. It becomes easier to maintain the deformed shape of the core.

According to a preferred aspect, the recess includes front and rear recesses extending in the front and rear direction.

Body fluid can be guided in the front-rear direction by the front-rear recesses, and the body fluid can be diffused in the front-rear direction. Generally, the length of the absorbent core in the front-rear direction is longer than that in the width direction. By providing the front and rear recesses, it becomes easy to guide the body fluid to the entire front and rear direction of the absorbent core.

According to a preferred aspect, the front and rear recesses are provided in at least one of the front side area and the rear side area.

The body fluid guided to the non-skin facing surface side by the opening in the central region can be guided to the front side region or the rear side region by the front and rear recesses. It becomes easy to guide the body fluid to the entire area in the front-back direction of the absorbent core.

According to a preferred aspect, the recess is provided in a plurality, and a compressed portion obtained by compressing the surface sheet and the absorbent core in the thickness direction is provided, and the compressed portion is the plan view. It is arranged across a plurality of recesses.

The body fluid can be drawn in by the squeezing unit and guided to the plurality of recesses via the squeezing unit. By the concave portion, the body fluid can be diffused in the plane direction on the non-skin-facing surface side of the absorbent core, and the body fluid can be guided to the entire absorbent core.

According to a preferred aspect, the surface sheet is provided with surface concave portions that are recessed toward the non-skin facing surface side, and surface convex portions that are arranged between the surface concave portions, and the surface concave portions and the surface convex portions. Extend in the front-rear direction and are arranged alternately in the width direction.

Body surface fluid can be diffused in the front-back direction by the surface recess. Generally, the length of the absorbent core in the front-rear direction is longer than that in the width direction. By providing the surface concave portion, it becomes easy to guide the body fluid to the entire region in the front-back direction of the relatively long absorbent core.

(2) Configuration of Absorbent Article Hereinafter, the absorbent article according to the embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary napkin, panty liner, breast milk pad, adult incontinence pad, fecal pad or sweat removal sheet. In particular, the absorbent article may be an article that is used by being attached to the inside of a worn article, such as the user's underwear.

In the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, it should be noted that the drawings are schematic and the ratios of the respective dimensions may differ from the actual ones. Therefore, specific dimensions should be determined in consideration of the following description. In addition, there may be a case where portions having different dimensional relationships and ratios are included between the drawings.

FIG. 1 is a plan view of the absorbent article 10 according to the first embodiment viewed from the skin facing surface side. Here, the "skin-facing surface side" corresponds to the side facing the wearer's skin during use. The "non-skin facing surface side" corresponds to the side facing away from the wearer's skin during use. 2 is a sectional view taken along the line AA shown in FIG. 1, and FIG. 3 is a sectional view taken along the line BB shown in FIG.

The absorbent article 10 has a front-back direction L and a width direction W. The front-rear direction L is a direction extending from the front side (abdominal side) of the wearer to the rear side (back side), or a direction extending from the rear side of the wearer to the front side. The width direction W is a direction orthogonal to the front-rear direction L.

The absorbent article 10 includes a front region R1, a rear region R2, and a central region R3. The central area R3 includes an excretory opening contact portion R33 that faces the excretory opening (eg, vaginal opening) of the wearer. When the absorbent article 10 is worn on the underwear, the central region R3 is located at the crotch portion of the underwear. That is, the excretory opening contact portion R33 is a region that is disposed between the wearer's crotch, that is, between the wearer's both legs. The central region R3 has a first central region R31 located at the center of the central region R3 in the width direction W, and a pair of second central regions R32 located on both sides in the width direction W with respect to the first central region R31. You may

The front area R1 is located on the front side of the central area R3. The front edge of the front region R1 defines the front edge of the absorbent article 10. The rear area R2 is located rearward of the central area R3. The rear edge of the rear region R2 defines the rear edge of the absorbent article 10. The length of the rear region R2 in the front-rear direction L may be longer than the length of the central region R3 in the front-rear direction L.

The wing 3 mentioned later may be provided in the central region R3. Further, a hip flap 4 that bulges outward in the width direction W may be provided in the rear side region R2. The front end edge of the wing 3 is defined by the root of the wing 3, and corresponds to the portion located on the front side of the two most recessed inner portions in the width direction W. The front edge of the wing 3 may define the boundary between the central region R3 and the front region R1. The rear end edge of the wing 3 is defined by the root of the wing 3, and corresponds to the portion located on the rear side of the two innermost recessed portions in the width direction W. The rear edge of the wing 3 may define the boundary between the central region R3 and the rear region R2.

The absorbent article 10 includes a topsheet 11 that faces the wearer's skin, a backsheet 12 that faces away from the wearer's skin, and an absorbent core 20 disposed between the topsheet 11 and the backsheet 12. And, including. The topsheet 11 is provided on the skin facing surface side T1 of the absorbent core 20. The back sheet 12 is provided on the non-skin facing surface side T2 with respect to the absorbent core 20. The absorbent core 20 is provided between the topsheet 11 and the backsheet 12. At least a squeezing section 41 obtained by compressing the topsheet 11 and the absorbent core 20 in the thickness direction may be provided.

The topsheet 11 is a liquid-permeable sheet that allows liquids such as body fluids to pass therethrough. The topsheet 11 may cover the central portion of the absorbent core 20 in the width direction W. The topsheet 11 may extend in the front-rear direction L from the front region R1 to the rear region R2. The topsheet 11 is made of any sheet-shaped material having a liquid-permeable structure such as a non-woven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. As the material for the woven or non-woven fabric, both natural fibers and chemical fibers can be used. The topsheet 11 may be composed of a plurality of layers, or may be composed of a sheet that covers the absorbent core 20 and a side sheet that covers the outer edge of the absorbent core 20.

The back sheet 12 is a liquid impermeable sheet. As the back sheet 12, a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene, a breathable resin film, a sheet obtained by joining a breathable resin film to a nonwoven fabric such as spunbond or spunlace can be used.

The absorbent core 20 is arranged at least in the central region R3 and the rear region R2. Further, the absorbent core 20 may extend from the central region R3 to the front region R1. The absorbent core 20 includes an absorbent material that absorbs liquid. The absorbent core 20 may be wrapped by a core wrap. The absorbent material forming the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp, and super absorbent polymer (SAP). The core wrap can be made of, for example, a non-woven fabric or a tissue sheet.

As described above, the absorbent article 10 has the wings 3 and the hip flaps 4. The wings 3 and the hip flaps 4 extend outside the outer edge of the absorbent core 20 in the central region R3 in the width direction W. The wings 3 and the hip flaps 4 may be formed by stacking a top sheet 11 and a back sheet 12. The wings 3 are configured to be folded back toward the back sheet 12 side. The wing 3 is folded back to the non-skin facing surface side of the crotch portion of the underwear when used.

The hip flaps 4 are located rearward of the wings 3 and are provided in the rear region R2. The hip flap 4 is not folded back during use and is placed between the underwear and the buttocks of the wearer. In this embodiment, the hip flap 4 is not provided with an absorbent material. Alternatively, the hip flap 4 may be provided with an absorbent material.

Next, the body fluid diffusion structure of the absorbent article 10 thus configured will be described. The absorbent article 10 is configured to easily guide body fluid to the entire absorbent core 20 while suppressing leakage of body fluid. The absorbent article 10 has an opening 45 that extends in the thickness direction across the topsheet 11 and the absorbent core 20. The body fluid discharged to the skin facing surface of the topsheet 11 by the opening 45 can be drawn to the non-skin facing surface side T2 and guided to the absorbent core 20. The opening 45 may be provided on the topsheet 11 and the absorbent core 20, and may be provided on a part of the topsheet 11 and the absorbent core 20 in the thickness direction T. The opening 45 may penetrate from the skin-facing surface of the topsheet 11 to the non-skin-facing surface of the absorbent core 20.

The opening 45 may be provided at least in the central region R3. The central region R3 includes the excretory contact portion R33, and body fluid discharged from the wearer is easily guided. Since the opening 45 is formed in the central region R3, the body fluid can be guided by the opening 45 in the thickness direction T, that is, from the skin facing surface side T1 to the non-skin facing surface side T2. The opening 45 may be provided in the first central region R31. The first central region R31 is a region that includes the excretion opening contact portion R33 and is easily guided by body fluid from the excretion opening of the wearer. The opening 45 may also be provided in the front area R1 and the rear area R2.

The opening 45 may have a dot shape in a plan view, a linear shape, a curved shape, or a plurality of openings. The opening 45 may be formed by processing such as cutting and cutting the surface sheet to the absorbent core without applying heat, may be formed by linear embossing, or may be dot-like embossing. May be formed by. It is preferable that the surface sheet 11 and the fibers constituting the absorbent core 20 are not pressure-bonded to each other by pressure-bonding. That is, it is preferable that at least a part of the peripheral portion R5 (see FIG. 3) surrounding the opening 45 is not provided with the pressure bonding portion. When the crimping portion is formed on the entire peripheral portion R5 of the opening 45, the body fluid guided to the opening 45 is drawn into the crimping portion and easily diffuses in the planar direction. Since the pressure-bonded portion is not formed in the peripheral portion R5, the body fluid guided to the opening 45 is more likely to diffuse in the thickness direction than in the plane direction. Therefore, the body fluid can be guided to the non-skin-facing surface side of the absorbent core 20. The peripheral portion R5 is a portion that surrounds the opening 45 in a plan view, and is a portion from the opening 45 to a distance corresponding to the thickness of the surface sheet or the absorbent core. Further, at least a part of the peripheral portion is a part of the entire periphery of the opening in plan view. It is preferable that the crimping portion is not provided with the crimping portion in 50% or more of the peripheral portion.

The absorbent core 20 is provided with a recess 30 that is recessed in the thickness direction on the non-skin-facing surface of the absorbent core 20. The recess 30 is recessed from the non-skin facing surface side T2 of the absorbent core 20 toward the skin facing surface side T1. The bottom of the recess 30 (the most recessed portion) does not reach the skin-facing surface of the absorbent core 20. Therefore, as shown in FIGS. 2 and 3, the absorbent material is disposed on the skin facing surface side T1 of the recess 30. The depth of the recess 30 can be 10 to 80% of the thickness of the absorbent core. The recessed portion 30 may be configured by a low basis weight portion having a lower basis weight of the absorbent material than the surrounding area, or may be configured by a portion compressed in the thickness direction.

The recess 30 is located outside the opening 45 in a plan view and extends toward the outer edge 20E of the absorbent core 20. The body fluid guided to the non-skin facing surface side by the opening 45 can be diffused toward the outer edge of the absorbent article. The recess 30 need only be located outside one opening 45, and need not be located outside all openings 45. For example, the opening 45 may be arranged outside the recess 30. The outer edge is a peripheral edge of the member and includes a front end edge and a rear end edge in the front-rear direction, and an outer edge in the width direction. The outside of the opening 45 means the outer edge side of the opening 45. That is, the recess 30 may be provided between the opening 45 and the outer edge 20E of the absorbent core 20. The recesses 30 may be provided in the front area R1, the central area R3, and the rear area R2. In the central region R3, the recess 30 may be provided in the second central region R32.

The recess may include a width recess 31 extending in the width direction W and a front-rear recess 32 extending in the front-rear direction L. The width concave portion 31 includes not only a structure extending parallel to the width direction W but also a structure extending along a line forming an angle of 45 degrees or less with the width direction W. The front-rear recesses 32 include not only a structure extending parallel to the front-rear direction L but also a structure extending along a line forming an angle of less than 45 degrees with respect to the front-rear direction L.

The width recess 31 may be provided outside the opening 45 in the width direction W. The body fluid guided by the opening 45 in the thickness direction T can be guided to the outside in the width direction W by the width recessed portion 31, and the body fluid can be easily diffused over the entire width direction W of the absorbent core 20. The width recess 31 may be provided within the range of the opening 45 in the front-rear direction L, that is, in a region extending in the width direction from the entire area of the opening 45 in the front-rear direction. The width recess 31 may be provided in the second central region R32. Since the opening 45 is provided in the first central region R31 and the width concave portion 31 is provided in the second central region R32, the body fluid is guided to the non-skin facing surface side T2 in the first central region R31, and the absorbent core is provided. The non-skin facing surface side T2 of 20 can be guided from the first central region R31 to the second central region side. In addition, the width recess 31 may be provided outside the opening 45 in the front-rear direction L. The width recess 31 of the present embodiment is arranged in each of the front region R1, the central region R3, and the rear region R2. Therefore, the effect of diffusing the body fluid can be exerted over the entire area of the absorbent core 20 in the front-rear direction.

The front-rear recess 32 may be provided outside the opening 45 in the front-rear direction L. Body fluid can be guided to the outside in the front-rear direction L by the opening 45. Generally, the length of the absorbent core 20 in the front-rear direction L is longer than the length thereof in the width direction W. By providing the front and rear recesses 32, it becomes easy to guide the body fluid to the entire region of the absorbent core 20 in the front and rear direction L. The front-rear recess 32 may be provided within the range of the opening 45 in the width direction W, that is, in the region extending in the front-rear direction from the entire area of the opening 45 in the width direction. Further, the front-rear recess 32 may be provided outside the opening 45 in the width direction W. The front and rear recesses 32 may be arranged so as to straddle the center of the absorbent article 10 in the width direction W. The front-rear recess 32 may be provided in at least one of the front region R1 and the rear region R2. The body fluid guided to the non-skin facing surface side by the opening 45 of the central region R3 is guided to the front region R1 or the rear region R2 by the front and rear recesses 32, and the body fluid is easily guided to the entire region in the front-rear direction L of the absorbent core 20.

Both the width recess 31 and the front-rear recess 32 are preferably provided. The body fluid can be diffused in both the width direction W and the front-rear direction L, and the body fluid can be more easily guided to the entire absorbent core 20. The width recess 31 and the front-rear recess 32 may be partially continuous. The width recess 31 and the front-rear recess 32 cooperate to efficiently diffuse the body fluid in the front-rear direction L and the width direction W.

Next, a diffusion mode of body fluid will be described with reference to FIG. FIG. 4 is a diagram schematically showing how the body fluid of the absorbent core 20 diffuses. The body fluid discharged from the excretory mouth of the wearer is guided to the central region R3 including the excretory mouth contact portion R33. The body fluid guided to the central region R3 is guided to the non-skin facing surface side T2 through the opening 45 (arrow A in FIG. 4). At this time, since the opening 45 straddles the topsheet 11 and the absorbent core 20, the body fluid is likely to be guided to the inside of the absorbent core 20 (the inside of the skin-facing surface). By guiding the body fluid to the non-skin-facing surface side, the diffusion of the body fluid on the skin-facing surface side of the absorbent core 20 can be suppressed, and the leakage of the body fluid can be suppressed.

The body fluid guided to the absorbent core 20 diffuses inside the absorbent core 20. More specifically, the bodily fluid diffuses toward the outside in the width direction W by the width recess 31 provided outside the opening 45 in the width direction W (arrow B). In addition, the body fluid diffuses outward in the front-rear direction L by the front-rear recesses 32 provided outside the opening 45 in the front-rear direction L (arrow C). At this time, since the width recess 31 is connected to the front recess 32, the body fluid in the process of being guided to the rear side by the front recess 32 is guided toward the outer edge 20E of the absorbent core 20 via the width recess 31 (arrow D). ). The concave portion 30 is formed on the non-skin facing surface of the absorbent core 20, and the body fluid can be diffused in the plane direction on the non-skin facing surface side of the absorbent core 20, and the body fluid can be guided to the entire absorbent core 20. Therefore, it becomes easy to guide the body fluid to the entire absorbent core 20 while suppressing the leakage of the body fluid.

Further, in order to facilitate movement of the body fluid guided by the opening 45 to the recess 30, the opening 45 and the recess 30 are preferably provided at the same level in the thickness direction. That is, the non-skin facing surface of the opening 45 may be located closer to the non-skin facing surface side T2 than the bottom surface (skin facing surface) of the recess 30. With such a configuration, the bodily fluid can easily move from the opening 45 to the recess 30. Suitably, the opening 45 may reach the non-skin facing surface of the absorbent core 20. The opening 45 makes it easier to guide the body fluid to the non-skin-facing surface of the absorbent core 20, and can further suppress the diffusion of the body fluid on the skin-facing surface side of the absorbent core 20.

A plurality of width recesses 31 may be provided at intervals in the front-rear direction L. The shape of the body along the front-rear direction L extending from the ventral side to the dorsal side is a rounded curved shape. The absorbent article is preferably arranged along the roundness of the body when worn by the wearer. The width concave portion 31 extends in the width direction, and is likely to serve as a folding base point of the absorbent core 20 extending in the width direction. The absorbent core 20 is easily arranged along the roundness of the body by the plurality of folding base points which are spaced apart in the front-rear direction. By disposing the absorbent core 20 along the body, it is easier to obtain the effect of absorbing the body fluid in the central region R3 and diffusing the body fluid by the opening 45 and the recess 30. Further, since the concave portion is formed on the non-skin facing surface of the absorbent core 20, when the absorbent core 20 is deformed so as to bend along the body at the time of wearing, the width of the concave portion 30 on the non-skin facing surface side (longitudinal direction length). Is longer than the length before deformation. The cross-sectional area of the body fluid diffusion path located on the non-skin facing surface side of the absorbent core 20 is increased, and the body fluid is more easily diffused on the non-skin facing surface side of the absorbent core 20.

The width recess 31 may pass through the center of the absorbent core 20 in the width direction and may be arranged symmetrically with respect to the width center line CL extending in the front-rear direction L. Since the width recesses 31 are symmetrical, a folding base point that connects the width recesses 31 to each other is formed, and the entire width direction of the absorbent core 20 can more easily follow the body. In addition, one of the width recesses 31 in the second central region and the other width recess 31 in the second central region are deformed in the same direction (deformation that is rounded with the skin-facing surface side inside), and the front-back direction thereof. Since the positions of L match, it becomes easy to maintain the deformed shape of the absorbent core 20 by the width recess 31 in cooperation with each other.

The recess 30 preferably does not reach the outer edge 20E of the absorbent core 20. The body fluid guided by the recess 30 can be absorbed by the absorbent material provided on the outer edge of the absorbent core 20, and side leakage can be prevented. In another form, the recess 30 may reach the outer edge of the absorbent core 20.

In a plan view, the compression unit 41 may be arranged across the plurality of recesses 30. In the squeezing section 41, the topsheet 11 and the absorbent core 20 are compressed, the density is higher than the surrounding area, and body fluid is easily drawn. In addition, the concave portion 30 does not have the absorbent core 20 arranged therein and has a lower density than the compressed portion 41. Therefore, the body fluid drawn in by the compression unit 41 is likely to be guided to the recess 30 after spreading along the compression unit 41. Body fluid can be drawn in by the squeezing section 41, and guided to the plurality of recesses 30 via the squeezing section 41. Due to the recess 30, the body fluid can be diffused in the plane direction on the non-skin-facing surface side of the absorbent core 20, and the body fluid can be guided to the entire absorbent core 20. In addition, the compression unit 41 and the recess 30 may be partially continuous. According to this, the bodily fluid is more likely to diffuse from the squeezing section 41 to the recess 30, and the effect of guiding the bodily fluid to the entire absorbent core 20 can be enhanced.

Further, the body fluid may be diffused in the front-back direction by the surface sheet 11. FIG. 5 is a schematic enlarged view of the topsheet. The surface sheet 11 may be provided with a surface recess 11A recessed to the non-skin facing surface side and a surface protrusion 11B arranged between the surface recesses 11A. The surface concave portions 11A and the surface convex portions 11B may extend in the front-rear direction L and may be alternately arranged in the width direction W. Body fluid can be diffused in the front-rear direction L along the surface recess 11A. In general, the absorbent core 20 has a length in the front-rear direction longer than that in the width direction. By providing the surface recessed portion 11A, it becomes easy to guide the body fluid to the entire region in the front-rear direction of the relatively long absorbent core 20.

Although the present invention has been described in detail above using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

It is possible to provide an absorbent article that easily guides body fluid to the entire absorbent core while suppressing leakage of body fluid.

10 Absorbent article 11 Topsheet 11A Surface recess 11B Surface projection 12 Backsheet 20 Absorbing core 30 Recess 31 Width recess 32 Front-rear recess 41 Compressed part 45 Opening R1 Front side area R2 Rear side area R3 Central area R5 Surrounding area R31 1st Central area R32 Second central area

Claims (8)

Back and forth,
A width direction orthogonal to the front-rear direction,
A central region including an excretory opening contact portion facing the excretory opening of the wearer,
Surface sheet,
An absorbent core arranged on the non-skin facing surface side of the surface sheet,
An absorbent article having the surface sheet and an opening extending in the thickness direction across the absorbent core,
The absorbent core is seen concave in the thickness direction at the non-skin facing surface of the absorbent core is provided with a recess having a basis weight less absorbent material than the surrounding,
The opening is arranged at least in the central region,
The recess has a width recess extending in the width direction toward the outer edge of the absorbent core,
Only the width recessed portion is arranged on the outer side in the width direction with respect to the opening,
A plurality of the width recesses are arranged at intervals in the front-rear direction,
An absorbent article in which the plurality of width recesses are separated from each other . The recess includes front and rear recesses extending in the front and rear direction,
The front and rear recesses are arranged only on the rear side of the opening,
The absorbent article according to claim 1, wherein the width recess is provided so as to be continuous with the front and rear recesses. The opening is formed by a hollowing process of cutting from the surface sheet to the absorbent core without applying heat,
The absorbent article according to claim 1 or 2, wherein a crimping portion to which fibers constituting the surface sheet and fibers constituting the absorbent core are pressure-bonded is not provided in a peripheral portion surrounding the opening . The absorbent article according to any one of claims 1 to 3, wherein the recess is provided so as not to reach an outer edge of the absorbent core. The absorbent article according to any one of claims 1 to 4, wherein the opening reaches a non-skin-facing surface of the absorbent core. The central region has a first central region located in the center of the central region in the width direction, and a pair of second central regions located on both sides in the width direction with respect to the first central region,
The opening is provided in the first central region,
The width concave portion is provided in each of the pair of second central regions,
The width recess, through the center of the width direction of the absorbent core, and wherein are arranged symmetrically with respect to the width center line extending in the longitudinal direction, claimed in any one of claims 5 Absorbent article. A plurality of the recesses are provided,
The surface sheet and the absorbent core are provided with a compressed portion compressed in the thickness direction,
The compressed portion is disposed astride a plurality of recesses in a flat surface when viewed absorbent article as claimed in any one of claims 6. The surface sheet is provided with a surface recess that is recessed on the non-skin facing surface side, and a surface protrusion that is disposed between the surface recesses,
The absorbent article according to any one of claims 1 to 7 , wherein the surface recesses and the surface protrusions extend in the front-rear direction and are alternately arranged in the width direction.

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