TWI712400B - Absorbent articles - Google Patents

Abstract

The absorbent article (10) has: a central domain (R3) that includes an excretion opening abutting part facing the wearer's excretion opening, a surface sheet (11), an absorption chip (20), and a spanning surface sheet and An opening (45) extending in the thickness direction to absorb the chip. The absorbent core is provided with a recess (30) recessed in the thickness direction on the non-skin facing surface of the absorbent core. The opening is arranged at least in the central area. At least a part of the recess is located outside the opening in a plan view, and extends toward the outer edge (20E) of the absorption chip.

Description

Absorbent articles

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

Patent Document 1 discloses an absorbent article equipped with an absorbent core provided with a plurality of recesses. The recesses of the absorbent core of Patent Document 1 are respectively 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 part is provided between the recesses. The concave part and the small absorption part are provided on the skin facing side of the absorption core. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2015-97715 A

[The problem to be solved by the invention]

In the absorbent article of Patent Document 1, the body fluid discharged from the wearer is guided to the concave portion and the small absorbent portion provided in the area facing the excretion opening. The body fluid is absorbed by the small absorption part and guided to the outside in the width direction and the outside in the front-rear direction by the concave part. The recesses are on the skin-facing surface side of the absorbent core and reach the outer edge of the absorbent core in the width direction and the outer edge of the front and rear direction. Therefore, the body fluid discharged from the wearer spreads over the entire absorbent core on the skin facing side of the absorbent core before being guided to the non-skin facing surface side of the absorbent core, and leakage of the body fluid may occur.

Therefore, while suppressing the leakage of bodily fluids, absorbent articles that can easily guide bodily fluids to the entire absorbent core are desirable. [Means to solve the problem]

An absorbent article of one form has: a central domain, a surface sheet, and an absorption chip, and an opening; the central domain includes an excretion opening contact portion facing the wearer's excretion opening, and the absorption chip is arranged in The non-skin facing side of the surface sheet, the opening extends in the thickness direction across the surface sheet and the absorbent core; the absorbent article is characterized in that the absorbent core is on the non-skin facing side of the absorbent core The skin facing surface is provided with a recessed portion recessed in the thickness direction. The opening is arranged at least in the central region, and at least a part of the recess is located closer to the outside than the opening in a plan view and faces the absorption The outer edge of the chip extends.

(1) Outline of implementation mode According to the description of this patent specification and the attached drawings, at least the following matters can be made clear.

A related aspect of an absorbent article has: a front-rear direction, a width direction, a central domain, a surface sheet, an absorbent core, and an opening; the width direction is orthogonal to the front-rear direction, and the central domain includes The abutment part of the excretion opening opposite to the excretion opening of the wearer, the absorption chip is arranged on the non-skin-facing side of the surface sheet, and the opening extends across the surface sheet and the absorption chip in the thickness direction; The absorbent article is characterized in that the absorbent core is provided with a concave portion recessed in the thickness direction on the non-skin facing surface of the absorbent core, and the opening is arranged at least in the central region, and at least a part of the concave portion In a plan view, it is located closer to the outside than the opening and extends toward the outer edge of the absorption chip.

According to a preferred aspect, the opening portion reaches the non-skin facing surface of the absorption chip.

The opening makes it easier to guide body fluids to the non-skin facing surface of the absorption chip, and it is possible to suppress the spread of body fluids on the skin facing surface of the absorption chip.

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

If the crimping portion is formed on the entire circumference of the opening, the body fluid guided to the opening is introduced into the crimping portion, and it becomes easy to spread in the plane direction around the opening. Since the crimping portion is not formed in the entire surrounding portion, the body fluid guided to the opening portion is more likely to spread 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 absorption core on the non-skin facing surface side of the absorption core.

According to a preferred aspect, the concave portion has a width concave portion extending in the width direction, and the width concave portion is provided in plural at intervals in the front-rear direction.

Since the width recesses are arranged in plural at intervals in the front-rear direction, the absorbent chip can be easily arranged along the curve of the body by the plural folding base points at intervals in the front-rear direction. By arranging the absorption chip along the body, it is easier to obtain the effect of absorbing body fluids through the central area of the absorption chip and diffusing body fluids through the openings and recesses.

According to a preferred aspect, the central domain has: a first central domain located at the center of the central domain in the width direction, and a pair of second central domains located on both sides of the width direction relative to the first central domain Central region; in the first central region, the opening is provided, each of the pair of second central regions is provided with the width recessed portion, the width recessed portion is relative to the center of the width direction passing through the absorption chip , And the width center lines extending in the front-rear direction are symmetrically arranged.

The body fluid discharged from the first central zone can be guided to the non-skin facing surface side, and the non-skin facing surface side of the absorption chip can be guided from the first central zone to the second central zone side. In addition, since the width recesses are symmetrical, a folding base point connecting the width recesses is formed, and the entire width direction of the absorption chip becomes easier to fit along the body. The width recessed portion of the second central area on one side and the width recessed portion of the second central area on the other side are deformed in the same direction and the positions in the front and rear directions are the same. Therefore, it becomes easy to cooperate with each other and maintain the The deformed shape of the absorbing chip formed by the recess.

According to a preferred aspect, the concave portion has a front and back concave portion extending in the front-rear direction.

The body fluid can be guided in the front and rear direction by the front and rear recesses, and the body fluid can be diffused in the front and rear directions. Generally, the length of the absorption chip in the front-rear direction is longer than the length in the width direction. By providing the front and rear recesses, it becomes easy to guide body fluids to the entire area in the front and rear direction of the absorption chip.

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

Through the opening of the central region, the body fluid guided to the non-skin facing side can be guided to the front region or the back region through the front and rear recesses. It becomes easy to guide body fluids to the entire area in the front and rear direction of the absorption chip.

According to a preferred aspect, the concave portion is provided with a plurality of squeezing portions for compressing the surface sheet and the absorbent core in the thickness direction, and the squeezing portion spans the plurality of concave portions in the plan view.地Configuration.

The body fluid is introduced by the squeezing part, and the body fluid can be guided to a plurality of recesses through the squeezing part. With the recess, the body fluid can be diffused in the plane direction on the non-skin facing surface side of the absorption chip, and the body fluid can be guided to the entire absorption chip.

According to a preferred aspect, the surface sheet is provided with: surface concave portions recessed toward the non-skin facing surface side, and surface convex portions arranged between the surface concave portions, and the surface concave portions and the surface convex portions extend from the surface In the front-rear direction, and alternately arranged in the above-mentioned width direction.

The surface recesses can diffuse body fluids in the front and rear directions. Generally, the length of the absorption chip in the front-rear direction is longer than the length in the width direction. With the provision of the surface recesses, it becomes easy to guide body fluids to the entire area of the relatively long absorption chip in the front and rear direction.

(2) The composition of absorbent articles Hereinafter, the absorbent article of the embodiment will be described with reference to the drawings. Absorbent articles can be sanitary napkins for sanitary use, cotton pads for daily use, breast milk pads, incontinence pads for adults, fecal cotton pads, or absorbent articles like sweat-absorbent sheets. In particular, the absorbent article may be an article that is attached to the inner side of a wearing article such as underwear for use.

In addition, in the description of the following drawings, the same or similar parts are marked with the same or similar symbols. However, it should also be noted that the drawing is a schematic representation, and the ratio of each size may be different from reality. Therefore, the specific dimensions, etc., should be judged with reference to the following description. In addition, there may be parts with different size relationships or ratios between the drawings.

Fig. 1 is a plan view of the absorbent article 10 of the first embodiment viewed from the skin facing surface side. Here, the "skin facing side" is equivalent to the side facing the wearer's skin during use. "Non-skin facing side" is equivalent to the side facing the wearer's skin during use. Figure 2 is a cross-sectional view taken along the line A-A shown in Figure 1; Figure 3 is a cross-sectional view taken along the line B-B shown in Figure 1.

The absorbent article 10 has a front-rear direction L and a width direction W. The front-rear direction L is a direction extending from the front side (ventral side) of the wearer to the back side (dorsal side), or a direction extending from the back 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 domain R1, a rear domain R2, and a central domain R3. The central domain R3 includes an excretion opening abutting portion R33 facing the wearer's excretion opening (for example, a fat mouth). When the absorbent article 10 is worn on underwear, the central region R3 is located at the bottom of the buttocks of the underwear. That is, the excretion opening contact portion R33 is arranged under the wearer's buttocks, that is, in the area between the wearer's feet. The central region R3 has a first central region R31 located in the center of the width direction W of the central region R3, and a pair of second central regions R32 located on either side of the width direction W with respect to the first central region R31.

The front domain R1 is located closer to the front than the central domain R3. The front end edge of the front domain R1 determines the front end edge of the absorbent article 10. The back domain R2 is located closer to the back than the central domain R3. The rear edge of the rear domain R2 determines the rear edge of the absorbent article 10. The length of the front-rear direction L of the rear domain R2 is longer than the length of the front-rear direction L of the central domain R3.

In the central area R3, a side wing 3 described later is provided. In addition, the rear region R2 is provided with hip wings 4 that expand outward in the width direction W. The front end edge of the side flap 3 is determined by the base of the side flap 3, and corresponds to the portion located on the front side of the two portions recessed most toward the inner side of the width direction W. The front edge of the wing 3 can also determine the boundary between the central region R3 and the front side region R1. The rear end edge of the side wing 3 is determined by the base of the side wing 3, and corresponds to the portion on the rear side of the two portions recessed most toward the inner side of the width direction W. The rear edge of the wing 3 can also determine the boundary between the central domain R3 and the rear domain R2.

The absorbent article 10 includes a top sheet 11 facing the wearer's skin, a back sheet 12 facing the opposite side of the wearer's skin, and an absorbent core 20 arranged between the top sheet 11 and the back sheet 12. The surface sheet 11 is provided closer to the skin-facing surface side T1 than the absorption core 20. The back sheet 12 is provided closer to the non-skin facing surface side T2 than the absorption core 20. The absorption chip 20 is provided between the front sheet 11 and the back sheet 12. At least a pressing part 41 for compressing the surface sheet 11 and the absorption core 20 in the thickness direction is provided.

The surface sheet 11 is a liquid-permeable sheet that allows liquids such as body fluids to permeate. The surface sheet 11 can cover the center of the absorption chip 20 in the width direction W. The surface sheet 11 can extend from the front domain R1 to the rear domain R2 in the front-rear direction L. The surface sheet 11 is composed of any sheet-like material having a liquid-permeable structure, such as non-woven fabric, woven fabric, perforated plastic sheet, and net-like sheet. As a woven or non-woven material, both natural fiber and chemical fiber can be used. The surface sheet 11 may also be composed of a plurality of layers, or may be composed of a sheet covering the absorption chip 20 and a side sheet covering the outer edge of the absorption chip 20.

The back sheet 12 is a liquid-impermeable sheet. The back sheet 12 can be used: laminated non-woven fabric with polyethylene sheet, polypropylene, etc. as the main body, breathable resin film, spunbond or spunlace non-woven fabric bonded with breathable resin film The slices and so on.

The absorption chip 20 is arranged at least in the central area R3 and the rear area R2. Moreover, the absorption chip 20 may extend from the central region R3 to the front side region R1. The absorption chip 20 contains an absorption material that absorbs liquid. The absorption chip 20 can also be covered by a chip adhesive film. The absorbent material constituting the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp, and super absorbent polymer (SAP). The chip glue film may be composed of non-woven fabric or fiber paper sheet, for example.

As described above, the absorbent article 10 is provided with side flaps 3 and buttocks flaps 4. The side wings 3 and the buttocks wings 4 extend outward in the width direction W than the outer edge of the absorbent core 20 located in the central region R3. The side flaps 3 and the buttocks flaps 4 are composed of a stack of a top sheet 11 and a back sheet 12. The side flap 3 is configured to be foldable on the back sheet 12 side. The side flap 3 is turned over on the non-skin facing side of the underpants crotch when in use.

The hip wings 4 are located closer to the back than the side wings 3, and are provided in the back region R2. The hip wings 4 are not folded during use and are arranged between the underwear and the wearer's hips. In this embodiment, no absorbent material is provided in the buttocks flap 4. Instead, an absorbent material may be provided on the hip wing part 4.

Next, a description will be given of the body fluid diffusion structure of the absorbent article 10 configured in this way. The absorbent article 10 has an overall structure that suppresses the leakage of bodily fluids and facilitates the introduction of bodily fluids to the absorbent core 20. The absorbent article 10 has an opening 45 extending in the thickness direction across the surface sheet 11 and the absorbent core 20. The body fluid discharged from the skin-facing surface of the surface sheet 11 can be introduced to the non-skin-facing surface side T2 by the opening 45 and guided to the absorption chip 20. The opening 45 only needs to span the surface sheet 11 and the absorption core 20, and can be provided in a part of the surface sheet 11 and the absorption core 20 in the thickness direction T. The opening 45 can penetrate from the skin-facing surface of the surface sheet 11 to the non-skin-facing surface of the absorption core 20.

The opening 45 may be provided at least in the central region R3. The central region R3 includes the excretion opening abutting portion R33, and it is easy to guide the body fluid discharged from the wearer. By forming the opening 45 in the central region R3, the body fluid can be guided in the thickness direction T by the opening 45, that is, from the skin-facing surface side T1 to the non-skin-facing surface side T2. The opening 45 can be provided in the first central region R31. The first central region R31 includes the excretion opening abutting portion R33, and is an area where body fluids are easily guided from the wearer's excretion opening. In addition, the opening 45 may be provided in the front region R1 and the rear region R2.

The opening 45 may be dot-shaped, linear, or curved in plan view, and may be formed in plural. The opening 45 may be formed by cutting and hollowing from the surface sheet to the absorbent core without heating, may be formed by linear embossing, or may be formed by dot-shaped embossing. Preferably, there is no processing of the crimping portion after crimping the fibers constituting the surface sheet 11 and the absorbent core 20. That is, it is preferable that no crimping part is provided in at least a part of the peripheral part R5 (refer to FIG. 3) surrounding the opening 45. If a crimping portion is formed in the entire surrounding portion R5 of the opening 45, the body fluid guided to the opening 45 is introduced into the crimping portion, and it becomes easy to spread in the planar direction. Since the pressure contact part is not formed in the peripheral part R5, the body fluid guided to the opening part 45 becomes easier to spread in the thickness direction than the planar direction. Therefore, the body fluid can be guided to the non-skin facing surface side of the absorption core 20. In addition, the peripheral portion R5 is a portion surrounding the opening 45 in a plan view, and is a portion from the opening 45 to the thickness of the surface sheet or absorption chip. In addition, at least a part of the peripheral portion is a part of the entire periphery of the opening in a plan view. Preferably, the crimping portion is preferably not provided with a crimping portion over 50% of the surrounding portion.

The absorption core 20 is provided with a recess 30 recessed in the thickness direction on the non-skin facing surface of the absorption core 20. The recess 30 is recessed from the non-skin facing surface side T2 of the absorption core 20 toward the skin facing surface side T1. The bottom (most concave portion) of the concave portion 30 does not reach the skin facing surface of the absorption chip 20. Therefore, as shown in 2 and 3, the absorbent material is arrange|positioned on the skin-facing surface side T1 of the recessed part 30. As shown in FIG. The depth of the recess 30 can be made to absorb 10 to 80% of the thickness of the chip. The recessed portion 30 may be formed of a low-basis weight portion in which the basis weight of the absorbent material is lower than that of the surrounding area, or may be formed of a portion compressed in the thickness direction.

The recess 30 is located closer to the outside than the opening 45 in a plan view, and extends toward the outer edge 20E of the absorption chip 20. With the opening 45, the body fluid guided to the non-skin facing surface side can be diffused toward the outer edge of the absorbent article. The recessed portion 30 only needs to be located on the outside of one opening 45 and need not be located on the outside of all the openings 45. For example, the opening 45 may be arranged on the outside of the recess 30. In addition, the outer edge is the peripheral end of the member, and includes the front and rear edges in the front-rear direction, and the outer edge in the width direction. In addition, the outside of the opening 45 refers to a place closer to the outer edge than the opening 45. That is, as long as the recess 30 is provided between the opening 45 and the outer edge 20E of the absorption chip 20. The recess 30 is provided in the front region R1, the central region R3, and the rear region R2. In the central region R3, the recess 30 may be provided in the second central region R32.

The recess includes a width recess 31 extending in the width direction W, and a front and rear recess 32 extending in the front and rear direction L. The width recessed portion 31 is not only a configuration extending in parallel in the width direction W, but also includes a configuration extending along a line forming an angle of 45 degrees or less with respect to the width direction W. In addition, the front-rear recessed portion 32 is not only a configuration extending in parallel in the front-rear direction L, but also includes a configuration 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 width direction W of the opening 45. The body fluid guided in the thickness direction T by the opening 45 can be guided to the outside of the width direction W by the width recessed portion 31, and the body fluid can easily spread across the entire area of the width direction W of the absorption chip 20. The width recessed portion 31 may be provided in the range of the front-rear direction L of the opening 45, that is, a region extending from the entire front-rear direction of the opening to the width direction. The width recess 31 can be provided in the second central region R32. By providing the opening 45 in the first central region R31 and the wide recess 31 in the second central region R32, the body fluid can be guided to the non-skin facing side T2 in the first central region R31, and the absorption chip The non-skin facing surface side T2 of 20 is guided from the first central area R31 to the second central area side. Moreover, the width recessed part 31 may be provided in the outer side of the front-back direction L of the opening part 45. The width recesses 31 of the embodiment of this embodiment are respectively arranged in the front region R1, the central region R3, and the rear region R2. Therefore, the body fluid can be diffused across the entire area of the absorption chip 20 in the front-rear direction.

The front and rear recesses 32 may be provided on the outer side of the opening 45 in the front and rear direction L. The body fluid can be guided to the outside in the front-rear direction L by the opening 45. Generally, the length of the absorption chip 20 in the front-rear direction L is longer than the length in the width direction W. By providing the front and rear recesses 32, it becomes easy to guide body fluids to the entire area in the front and rear direction L of the absorption chip 20. The front and rear recesses 32 may be provided in the range of the width direction W of the opening 45, or may be provided in an area extending from the entire width direction of the opening in the front and rear direction. In addition, the front and rear recesses 32 may be provided outside the width direction W of the opening 45. The front and rear recesses 32 may be arranged across the center in the width direction W of the absorbent article 10. The front and rear recesses 32 may be provided in at least one of the front domain R1 and the rear domain R2. The opening 45 of the central region R3 is guided to the body fluids on the non-skin facing side, and the front and rear recesses 32 are guided to the front region R1 or the rear region R2, and it becomes easy to guide the body fluids to the front and rear of the absorption chip 20 The entire area in the direction L.

Preferably, both the width recess 31 and the front and rear recesses 32 are provided. The body fluid can be diffused in both the width direction W and the front-rear direction L, and it becomes easier to guide the body fluid to the entire absorption chip 20. In addition, the width recesses 31 and the front and rear recesses 32 may be partially connected. The width recesses 31 and the front and rear recesses 32 cooperate with each other to efficiently diffuse body fluids in the front and rear direction L and the width direction W.

Next, based on Figure 4, the diffusion mode of body fluids will be explained. FIG. 4 is a diagram schematically showing the diffusion state of body fluid of the absorption chip 20. FIG. The body fluid discharged from the excretion port of the wearer is guided to the central region R3 including the excretion port contact portion R33. The bodily fluid guided to this central region R3 is guided to the non-skin facing surface side T2 via the opening 45 (arrow A in Fig. 4). At this time, since the opening 45 spans the surface sheet 11 and the absorption core 20, body fluids are easily guided to the inside of the absorption core 20 (inside of the skin facing surface). By guiding the bodily fluid to the non-skin-facing surface side, the diffusion of the bodily fluid on the skin-facing surface side of the absorption chip 20 can be suppressed, and the leakage of the bodily fluid can be suppressed.

The body fluid guided to the absorption chip 20 diffuses in the absorption chip 20. In more detail, the body fluid spreads toward the outside of the width direction W by the width recess 31 provided on the outer side of the width direction W of the opening 45 (arrow B). In addition, the body fluid spreads toward the outside of the front-rear direction L by the front-rear recesses 32 provided on the outer side of the front-rear direction L of the opening 45 (arrow C). At this time, since the width recesses 31 are connected to the front and rear recesses 32, the body fluid in the process of being guided to the rear side by the front and rear recesses 32 is guided toward the outer edge 20E of the absorption chip 20 via the width recesses 31 (arrow D ). The recess 30 is formed on the non-skin facing surface of the absorption core 20 and can diffuse body fluids in the planar direction on the non-skin facing surface of the absorption core 20 and can guide the body fluids to the entire absorption core 20. Therefore, it becomes easy to guide the bodily fluid to the entire absorption chip 20 while suppressing the leakage of bodily fluid.

In addition, since the body fluid guided by the opening 45 is easy to move 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. According to such a configuration, body fluids tend to move from the opening 45 to the recess 30. Preferably, the opening 45 reaches the non-skin facing surface of the absorption chip 20. The opening 45 makes it easier to guide bodily fluids to the non-skin facing surface of the absorption core 20, and it is possible to suppress the spread of bodily fluids on the skin facing surface of the absorption core 20.

The width recesses 31 may be provided in plural at intervals in the front-rear direction L. The shape of the body along the front and back direction L from the abdomen to the back is a curved shape with an arc. The absorbent article should be arranged along the curve of the body when it is worn by the wearer. The width recessed portion 31 extends in the width direction and easily becomes a folding base point of the absorbent core 20 extending in the width direction. The absorption chip 20 can be easily arranged along the curve of the body by a plurality of folding base points arranged at intervals in the front-rear direction. By arranging the absorption chip 20 along the body, it is easier to obtain the effect of absorbing bodily fluid in the central region R3, and diffusing the bodily fluid through the opening 45 and the recess 30. In addition, since the recessed portion is formed on the non-skin facing surface of the absorbent core 20, when the absorbent core 20 is bent and deformed along the body during installation, the width of the non-skin facing surface of the recessed portion 30 (the length in the front-rear direction) will change. It is longer than the length before deformation. The cross-sectional area of the diffusion path of the bodily fluid located on the non-skin facing surface side of the absorption chip 20 becomes larger, and it becomes easier to diffuse bodily fluids on the non-skin facing surface side of the absorption chip 20.

The width recesses 31 pass through the center of the absorbing chip 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 where the width recesses 31 are connected to each other is formed, and the entire width direction of the absorption chip 20 is easier to fit along the body. In addition, the width recessed portion 31 of the second central area on one side and the width recessed portion 31 of the second central area on the other side are deformed in the same direction (curved and deformed so that the facing side of the skin becomes the inner side). The position of the direction L is consistent, so it becomes easy to cooperate with each other to maintain the deformed shape of the absorption chip 20 by the width recess 31.

The recess 30 preferably does not reach the outer edge 20E of the absorption chip 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, which can prevent side leakage. In other forms, the recess 30 can also reach the outer edge of the absorption chip 20.

In a plan view, the pressing portion 41 can be arranged to span a plurality of recesses 30. In the pressing part 41, the surface sheet 11 and the absorption core 20 are compressed, and compared with the surroundings, it has a higher density and is easy to introduce body fluids. In addition, the recessed portion 30 is not provided with the absorption core 20, and its density is lower than that of the press portion 41. Therefore, the body fluid introduced by the squeezing part 41 is easily guided to the recessed part 30 after spreading along the squeezing part 41. The squeezing part 41 introduces the body fluid, and the squeezing part 41 can be interposed to guide the body fluid to the plurality of recesses 30. With the recess 30, the body fluid can be diffused in the planar direction on the non-skin facing surface side of the absorption chip 20, and the body fluid can be guided to the entire absorption chip 20. Moreover, the press part 41 and the recessed part 30 may be partially connected. Thereby, it becomes easier for the bodily fluid to diffuse from the pressing portion 41 toward the recessed portion 30, and the effect of guiding the bodily fluid to the entire absorption chip 20 can be improved.

In addition, the body fluid may be diffused in the front-rear direction by the surface sheet 11. Figure 5 is a schematic enlarged view of the surface sheet. The surface sheet 11 may be provided with a surface concave portion 11A recessed toward the non-skin facing surface side and a surface convex portion 11B arranged between the surface concave portion 11A. The surface concave portion 11A and the surface convex portion 11B may extend in the front-rear direction L and are alternately arranged in the width direction W. The body fluid can be diffused in the front-rear direction L along the surface recess 11A. Generally, the length of the absorption chip 20 in the front-rear direction is longer than the length in the width direction. With the provision of the surface recess 11A, it becomes easy to guide the body fluid to the entire area of the relatively long absorption chip 20 in the front-rear direction.

As mentioned above, the present invention has been explained in detail using the above-mentioned embodiments, but it is clear to the practitioner that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of patent claims. Therefore, the description in this specification is for the purpose of illustration and does not imply any limitation on the present invention. [Industrial availability]

It is possible to provide an absorbent article that can easily guide the body fluid to the entire absorption chip while suppressing the leakage of body fluid.

3‧‧‧flank 4‧‧‧Hip Wing 10‧‧‧Absorbent articles 11‧‧‧Surface sheet 11A‧‧‧Surface concave 11B‧‧‧Surface convex 12‧‧‧Back sheet 20‧‧‧Absorption chip 20E‧‧‧Outer edge 30‧‧‧Concave 31‧‧‧Width recess 32‧‧‧Front and back recesses 41‧‧‧Press section 45‧‧‧Opening R1‧‧‧Front domain R2‧‧‧Rear domain R3‧‧‧Central Domain R5‧‧‧peripheral part R31‧‧‧The first central domain R32‧‧‧Second Central Domain R33‧‧‧Excretion port abutment part CL‧‧‧Width center line W‧‧‧Width direction L‧‧‧Front and back direction

Figure 1 is a plan view of the absorbent article of the embodiment viewed from the skin facing surface side. Figure 2 is a cross-sectional view along the line A-A shown in Figure 1. Figure 3 is a cross-sectional view along the line B-B shown in Figure 1. Figure 4 is a schematic diagram showing the diffusion state of body fluids of the absorption chip. Figure 5 is a schematic enlarged view of the surface sheet.

3‧‧‧flank

4‧‧‧Hip Wing

10‧‧‧Absorbent articles

11‧‧‧Surface sheet

20‧‧‧Absorption chip

20E‧‧‧Outer edge

30‧‧‧Concave

31‧‧‧Width recess

32‧‧‧Front and back recesses

41‧‧‧Press section

45‧‧‧Opening

CL‧‧‧Width center line

R1‧‧‧Front domain

R2‧‧‧Rear domain

R3‧‧‧Central Domain

R31‧‧‧The first central domain

R32‧‧‧Second Central Domain

R33‧‧‧Excretion port abutment part

W‧‧‧Width direction

L‧‧‧Front and back direction

Claims (8)

An absorbent article having: a front-rear direction, a width direction orthogonal to the aforementioned front-rear direction, a central area including an excretion opening abutting portion facing the excretion opening of a wearer, a surface sheet, and a surface sheet disposed on the surface The absorbent core on the non-skin facing side of the sheet, and an opening extending in the thickness direction across the surface sheet and the absorbent core; the absorbent article is characterized in that the absorbent core is provided on the absorbent core The non-skin facing surface is provided with a recess that is recessed in the thickness direction and the basis weight of the absorbent material is lower than the surrounding; the opening is arranged at least in the central region; the recess has an outer edge facing the absorbent core and extends The width recessed portion in the width direction; the width recessed portion is arranged on the outer side of the width direction than the opening portion; the width recessed portion is provided in plural at intervals in the front and rear direction; the plural width The recesses are spaced apart from each other. The absorbent article according to claim 1, wherein the recessed portion has a front and rear recessed portion extending in the front-rear direction; the front and rear recessed portion is arranged only behind the opening; the width recessed portion , Is connected to the above-mentioned front and rear recesses and provided. The absorbent article according to claim 1 or 2, wherein the opening is formed by cutting and hollowing from the surface sheet to the absorbent core without heating; and surrounding the opening There is no crimping portion for crimping the fibers constituting the surface sheet and the absorbent core. The absorbent article described in item 1 or 2 of the scope of the patent application, wherein the concave portion is provided in a manner that does not reach the outer edge of the absorbent core. The absorbent article according to claim 1 or 2, wherein the opening portion reaches the non-skin facing surface of the absorbent core. The absorbent article according to claim 1 or 2, wherein the central domain has: a first central domain positioned at the center of the width direction of the central domain, and a first central domain positioned relative to the first center A pair of a second central domain on one of the two sides in the width direction of the domain; the opening is provided in the first central domain; Each of the pair of second central regions is provided with the width recess; the width recess is symmetrically arranged with respect to the center of the width direction passing through the absorption chip and extending in the front and rear direction . The absorbent article according to item 1 or 2 of the scope of patent application, wherein the concave portion is provided with a plurality of recesses; a pressing portion that compresses the surface sheet and the absorbent core in the thickness direction is provided; the pressing portion, It is arranged so as to straddle the plurality of recesses in a plan view. The absorbent article according to claim 1 or 2, wherein the surface sheet is provided with: surface concave portions recessed toward the non-skin facing surface side and surface convex portions arranged between the surface concave portions; 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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