CN115551454A

CN115551454A - Absorbent article

Info

Publication number: CN115551454A
Application number: CN202180033756.4A
Authority: CN
Inventors: 高阪翔士; 山本纯子
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2020-05-29
Filing date: 2021-05-19
Publication date: 2022-12-30
Anticipated expiration: 2041-05-19
Also published as: JP6976383B1; CN116650229A; CN115551454B; JP2021186273A; WO2021241346A1; CN116672169A

Abstract

An absorbent article (1) having a longitudinal direction, a width direction and a thickness direction, the absorbent article comprising a multilayer absorbent body (100) comprising: a first absorbent (10) having a first absorbent core (11); and a second absorber (20) having a second absorbent core (21) and arranged on the non-skin side in the thickness direction with respect to the first absorber (10). The absorbent article (1) is characterized in that the multilayer absorbent (100) has a hydrophobic region (H) and a non-hydrophobic region (N) in the thickness direction in a boundary portion between the first absorbent (10) and the second absorbent (20) when viewed in the thickness direction, the hydrophobic region including hydrophobic portions, and the non-hydrophobic region not including hydrophobic portions (25).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

As an absorbent article for absorbing excrement such as urine, a sanitary napkin, a light incontinence pad, and the like are known. For example, patent document 1 discloses an absorbent article in which: a hydrophilic liquid diffusion sheet is provided between the upper layer absorber and the lower layer absorber, and the discharged fluid absorbed in the upper layer absorber is diffused planarly by the liquid diffusion sheet and then absorbed by the lower layer absorber.

CITATION LIST

Patent literature

Patent document 1: japanese patent application laid-open No. 2013-106634

Disclosure of Invention

Technical problem

In the absorbent article described in patent document 1, there is a risk that the discharged fluid that has been absorbed by the lower absorbent layer returns to the upper absorbent layer, causing discomfort to the wearer due to the discharged fluid returning to the upper absorbent layer.

The present invention has been achieved in view of the conventional problems such as those described above, and it is an aspect of the present invention to provide an absorbent article that reduces the return of discharged fluid absorbed by a second absorbent to a first absorbent.

Solution to the problem

One main aspect of the present invention for achieving the above-described aspect is an absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article comprising: a multilayer absorbent body comprising: a first absorbent having a first absorbent core; and a second absorbent body that has a second absorbent core and is arranged on the non-skin side in the thickness direction with respect to the first absorbent body, wherein the multilayer absorbent body has, in a boundary portion between the first absorbent body and the second absorbent body in the thickness direction, a hydrophobic region including a hydrophobic portion and a non-hydrophobic region including no hydrophobic portion, in the hydrophobic portion having hydrophobicity, when viewed in the thickness direction.

Other features of the present invention in addition to those described above will become apparent by reading the description of the present specification and by referring to the accompanying drawings.

Advantageous effects of the invention

According to the present invention, although the multilayer absorbent body absorbs more discharged fluid, the hydrophobic region may enable discharged fluid absorbed by the second absorbent body to return to the first absorbent body less easily, which may reduce the risk of discomfort to the wearer due to discharged fluid leaking from the absorbent article or discharged fluid absorbed by the second absorbent body returning to the first absorbent body.

Drawings

Fig. 1 is a plan view of a light incontinence pad 1 in a stretched state, viewed from the skin side.

Fig. 2 is a plan view of the pad 1 in a stretched state as viewed from the non-skin side.

Fig. 3 is a schematic cross-sectional view of the pad 1 taken along line I-I in fig. 1.

Fig. 4 is an enlarged view of a portion Z in fig. 3.

Fig. 5 is an explanatory view showing the non-slip portion 30, the connecting portion 50, and the separating portion 60.

Fig. 6 is a schematic sectional view showing an end portion in the width direction of the mat 1.

Fig. 7 is a plan view of the pad 1S according to another embodiment when viewed from the skin side.

Fig. 8 is a schematic cross-sectional view of a pad 1S according to another embodiment.

Detailed Description

At least the following matters will become clear from the description of the present specification and the accompanying drawings.

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article comprising: a multilayer absorbent body comprising: a first absorbent having a first absorbent core; and a second absorbent body having a second absorbent core and disposed on a non-skin side in a thickness direction with respect to the first absorbent body, the multilayer absorbent body having a hydrophobic region and a non-hydrophobic region in the thickness direction in a boundary portion between the first absorbent body and the second absorbent body when viewed in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including a hydrophobic portion.

According to the above absorbent article, the multilayer absorbent body can absorb more discharged fluid, and the hydrophobic region makes it possible for discharged fluid absorbed by the second absorbent body to return to the first absorbent body less easily. Thus, the risk of discomfort to the wearer due to leakage of excreted fluid from the absorbent article or return of excreted fluid absorbed by the second absorbent to the first absorbent can be reduced.

In such an absorbent article, it is desirable that the absorbent article has an overlapping region where the first absorber and the second absorber overlap with each other when viewed in the thickness direction, the overlapping region has a portion overlapping with the water-repellent region when viewed in the thickness direction, and the overlapping region has a portion also overlapping with the non-water-repellent region when viewed in the thickness direction.

According to the above absorbent article, since the overlapping region has a portion overlapping with the non-hydrophobic region, the excreted fluid absorbed by the first absorbent is transferred to the second absorbent. The overlapping region has a portion overlapping with the hydrophobic region, and the hydrophobic region makes the excreted fluid absorbed by the second absorbent less likely to return to the first absorbent. This makes it possible to reduce the risk of discomfort to the wearer due to leakage of excreted fluid from the absorbent article or due to return of excreted fluid absorbed by the second absorbent to the first absorbent.

Among such absorbent articles, it is desirable that the absorbent article has: an overlapping region in which the first absorber and the second absorber overlap with each other when viewed in the thickness direction; and a non-overlapping region in which the first absorbent and the second absorbent do not overlap with each other when viewed in the thickness direction, the water-repellent region being provided in the non-overlapping region, and the non-water-repellent region being provided in the overlapping region.

According to the above absorbent article, the first absorbent and the second absorbent absorb more discharged fluid. Also, in the overlapping region, the excreted fluid absorbed by the first absorbent is moved to the second absorbent, and in the non-overlapping region, the risk of the excreted fluid absorbed by the second absorbent moving to the skin side relative to the second absorbent can be reduced. Thus, the risk of leakage of excreted fluid from the absorbent article can be reduced. Further, in the case where the first absorbent is larger than the second absorbent, even if a force is applied to a portion overlapping with the non-overlapping area in the thickness direction due to a change in the sitting posture of the wearer or the like, the hydrophobic area located in the non-overlapping area on the non-skin side surface of the first absorbent overlapping with the non-overlapping area when viewed in the thickness direction makes it possible to reduce the risk of leakage of excrement absorbed by the first absorbent from the non-skin side surface of the first absorbent to the non-skin side.

In such an absorbent article, it is desirable that an adhesive portion is provided on the non-skin side surface of the second absorbent body, and the absorbent article has, at least at predetermined positions in the longitudinal direction, a connecting portion which is a portion provided in a central portion in the width direction and in which the first absorbent body and the second absorbent body are connected, and a pair of separating portions which are portions provided in both end portions in the width direction and in which the first absorbent body and the second absorbent body are spaced apart from each other.

According to the above absorbent article, in the separated portion, the excreted fluid absorbed by the second absorbent is less likely to return to the first absorbent than in the case where the first absorbent and the second absorbent are in contact with each other.

In such an absorbent article, it is desirable that the non-hydrophobic region has a portion that does not overlap with the separation portion when viewed in the thickness direction.

According to the absorbent article described above, the risk of hindering the movement of excreted fluid from the first absorbent to the second absorbent can be reduced.

In such an absorbent article, it is desirable that the adhesive portion has a portion overlapping with the separation portion when viewed in the thickness direction.

According to the above absorbent article, the second absorbent body more easily follows the movement of the undergarment to which the absorbent article is partially adhered by the adhesive. Therefore, in the separation section, the return of the excreted fluid absorbed by the second absorbent to the first absorbent can be further reduced as compared with the case where the first absorbent and the second absorbent are in contact with each other.

In such an absorbent article, it is desirable that the hydrophobic region has a portion overlapping with the separation portion when viewed in the thickness direction.

According to the above absorbent article, the portion of the separation portion overlapping with the hydrophobic region can further reduce the return of the excreted fluid absorbed by the second absorbent to the first absorbent when viewed in the thickness direction.

In such an absorbent article, a pair of elastic members which are desired to be stretched and contracted in the longitudinal direction are arranged in both end portions in the width direction of the first absorbent, and each elastic member has a portion overlapping with the separation portion when viewed in the thickness direction.

According to the above absorbent article, the contraction of the elastic member makes it easier for the first absorbent and the second absorbent to be spaced apart from each other in the separation section, which makes it possible to reduce the return of the discharged fluid absorbed by the second absorbent to the first absorbent.

In such an absorbent article, it is desirable that a portion where the first absorbent core is not arranged is provided in both end portions in the width direction of the first absorbent, and in the portion where the first absorbent core is not arranged, the elastic member is interposed between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric in the thickness direction.

According to the absorbent article described above, the elastic member makes it easier for both end portions in the width direction of the first absorbent to rise, which makes the central portion in the width direction concave, so that the risk of leakage of excreted fluid from the absorbent article can be reduced.

In such an absorbent article, it is desirable that the hydrophobic portion is a non-skin side nonwoven fabric.

According to the above absorbent article, since it is not necessary to provide a new material as the hydrophobic portion, the manufacturing cost can be reduced.

In such an absorbent article, it is desirable that, in the hydrophobic region, a plurality of hydrophobic portions are arranged side by side with respect to the thickness direction.

According to the above absorbent article, the return of the discharged fluid, which has been absorbed by the second absorbent, to the first absorbent can be further reduced.

In such an absorbent article, it is desirable that the first absorbent has a groove portion recessed from the skin side toward the non-skin side, and the groove portion is not present in the hydrophobic region when viewed in the thickness direction.

According to the above absorbent article, the groove portions in the hydrophobic region can suppress the movement of the excreted fluid between the first absorbent and the second absorbent, and this can make it less likely that the excreted fluid absorbed by the second absorbent returns to the first absorbent.

In such an absorbent article, it is desirable that the groove portions are provided from the first absorber to the second absorber in the thickness direction.

According to the above absorbent article, the hydrophobic region makes the discharged fluid absorbed by the second absorbent less likely to return to the first absorbent and facilitates the movement of the discharged fluid from the first absorbent to the second absorbent.

In such absorbent articles, it is desirable that the superabsorbent polymer of the first absorbent core has a weight per unit area that is greater than the weight per unit area of the superabsorbent polymer of the second absorbent core.

According to the above absorbent article, it is possible to improve the water retention property of the first absorbent core and reduce the risk of the excreted fluid absorbed by the first absorbent core returning to the skin side of the wearer, as compared with the case where the weight per unit area of the superabsorbent polymer of the second absorbent core is higher than the weight per unit area of the superabsorbent polymer of the first absorbent core.

In such absorbent articles, it is desirable that the second absorbent core has superabsorbent polymers and pulp fibers.

According to the absorbent article described above, the pulp fibers more easily attract liquid, and therefore, the excreted fluid absorbed by the first absorbent is more easily attracted to the second absorbent, and return of the excreted fluid absorbed by the first absorbent to the skin side is more easily reduced.

In such absorbent articles, it is desirable that the second absorbent core has pulp fibers and does not have superabsorbent polymers.

According to the above-mentioned absorbent article, the property of diffusing discharged fluid in the second absorbent core can be enhanced as compared with the case where superabsorbent polymer is included, and thus discharged fluid can be absorbed more quickly over a wide range of the second absorbent core.

In such an absorbent article, it is desirable that the second absorbent has a greater maximum absorption amount of discharged fluid than the first absorbent.

According to the above absorbent article, the second absorbent is disposed on the non-skin side with respect to the first absorbent. Therefore, the second absorbent body absorbs a larger amount of discharged fluid, which makes it possible to further reduce the discomfort given to the wearer's skin by the discharged fluid.

This embodiment

Next, an absorbent article according to the present embodiment will be described by taking a light incontinence pad as an example. However, the absorbent article is not limited to light incontinence pads, and examples of other absorbent articles include sanitary napkins and panty liners.

Basic structure of a light incontinence pad 1

Fig. 1 is a plan view of a light incontinence pad 1 (hereinafter also referred to as "pad") as viewed from the skin side in a stretched state. Fig. 2 is a plan view of the pad 1 in a stretched state as viewed from the non-skin side. Fig. 3 is a schematic cross-sectional view of the pad 1 taken along line I-I in fig. 1. It should be noted that the stretched state of the cushion 1 means a state in which the cushion 1 is stretched without wrinkles. Specifically, the stretched state refers to a state in which the pad 1 is stretched such that the dimensions of the constituent members of the pad 1 match or are close to the dimensions of the constituent members themselves, in a state in which the constituent members of the pad 1 are not affected by the elastic members of the pad 1.

The pad 1 has a longitudinal direction, a width direction and a thickness direction. In the thickness direction, the side in contact with the skin of the wearer is defined as the skin side, and the side opposite to the skin side is defined as the non-skin side. The pad 1 of the present embodiment has a symmetrical configuration in the longitudinal direction. Thus, one side of the pad 1 in the longitudinal direction may be defined as the front side of the wearer or the back side of the wearer.

As shown in fig. 3, the pad 1 includes a multilayer absorbent body 100, a pair of first side sheets 16, a pair of second side sheets 25, and a back sheet 24.

"multilayer absorbent body" refers to a structure in which a plurality of absorbent bodies are overlapped with each other in the thickness direction. The multilayer absorbent body 100 of the pad 1 comprises: a first absorbent 10; and a second absorbent body 20 disposed on the non-skin side in the thickness direction with respect to the first absorbent body 10. In the multilayer absorbent 100, a larger amount of discharged fluid can be absorbed because the discharged fluid is first absorbed by the first absorbent 10 disposed on the skin side, and then the discharged fluid absorbed by the first absorbent 10 is absorbed by the second absorbent 20 disposed on the non-skin side with respect to the first absorbent. Further, since the excreted fluid absorbed by the first absorbent 10 is transferred to the second absorbent, it is possible to reduce the amount of excreted fluid remaining in the first absorbent 10 and improve the texture during use of the pad. The first absorbent 10 of the diaper 1 has a length in the width direction substantially equal to or slightly shorter than the length in the width direction of the second absorbent 20. It should be noted that the multilayer absorbent 100 is not limited to including two absorbents (the first absorbent 10 and the second absorbent 20) and may include two or more absorbents.

The first absorbent 10 comprises: a first absorbent core 11; a first skin side core wrap 12 covering the skin side surface of the first absorbent core 11; a first non-skin side core wrap 13 covering the non-skin side surface of the first absorbent core 11; a top sheet 14 disposed on the skin side with respect to the first skin side core wrap 12; and an intermediate sheet 15 disposed between the top sheet 14 and the first skin side core wrap 12. These members are joined with adhesives A1 to A6 (such as hot melt adhesives).

The top sheet 14 and the intermediate sheet 15 are liquid-permeable sheets. As the liquid-permeable sheet, a nonwoven fabric sheet (for example, a breathable nonwoven fabric sheet, a spunbonded nonwoven fabric sheet, or the like), a synthetic resin film having through holes, or the like can be used.

The first absorbent core 11 is made of a superabsorbent polymer (hereinafter also referred to as "SAP"). The first skin side core wrap 12 and the first non-skin side core wrap 13 are liquid permeable sheets, and a nonwoven sheet or the like may also be employed. In the following description, the first absorbent core 11, the first skin side core wrap 12 and the first non-skin side core wrap 13 will be collectively referred to as first core portions 11 to 13.

Both end portions in the width direction of the first skin-side core wrap 12 are folded back to be placed on portions of the non-skin-side surface of the first non-skin-side core wrap 13 so as to surround both end edges in the width direction of the first absorbent core 11 and both end edges in the width direction of the first non-skin-side core wrap 13. The fragrance 17 is arranged between the folded back portion of the first skin side core wrap 12 and the first non-skin side core wrap 13. The fragrance 17 may mask the odor of the discharged fluid or reduce the wearer's uneasiness or depression in using the pad 1.

The first side sheet 16 is arranged in both end portions in the width direction of the first absorbent 10. The first side sheet 16 is a liquid-impermeable sheet, and in the present embodiment, the first side sheet 16 is a nonwoven sheet (e.g., an air-permeable nonwoven sheet or a spunbond nonwoven sheet) including hydrophobic fibers. One end portion of the first side sheet 16 is fixed to both end portions in the width direction of the non-skin side surface of the first core portions 11 to 13 (specifically, to the folded-back portion of the first skin-side core wrap 12) with an adhesive A6. The first side sheet 16 is folded back from the fixing portion toward the skin-side surface side of the top sheet 14 so as to surround both end edges in the width direction of the first core portions 11 to 13, the top sheet 14, and the intermediate sheet 15. The other end portion of the first side sheet 16 is fixed to both end portions in the width direction of the skin-side surface of the top sheet 14 with an adhesive A7.

Further, at the end edge in the width direction of the first side sheet 16, a single elastic cord 18 (elastic member) that stretches and contracts in the longitudinal direction is arranged. That is, the elastic cord 18 is fixed to the first side sheet 16 in a state of being stretched in the longitudinal direction. It should be noted that instead of the elastic cord 18 (cord-like elastic member), a sheet-like elastic member such as a stretchable film may be disposed. Further, the number of the elastic cord 18 is not limited to one, and a plurality of elastic cords 18 may be used. Further, in the figure, only the stretching/contracting portions (18 a to 18b in fig. 2) of the elastic cord 18, which exhibit stretchability, are shown.

The second absorbent body 20 includes: a second absorbent core 21; a second skin-side core wrap 22 covering the skin-side surface of the second absorbent core 21; and a second non-skin side core wrap 23 covering the non-skin side surface of the second absorbent core 21. These members are joined with adhesives A8 to a11 (such as hot melt adhesives).

The second absorbent core 21 is an absorbent core obtained by forming liquid-absorbent fibers (such as pulp fibers or cellulose-based absorbent fibers) into a predetermined shape. Superabsorbent polymers (SAP) may or may not be added to the liquid absorbent fibers. The second skin side core wrap 22 and the second non-skin side core wrap 23 are liquid permeable sheets, and may employ tissue paper, nonwoven fabric sheets or the like. Both end portions in the width direction of the second skin-side core wrap 22 are folded back to positions of both end portions in the width direction on the non-skin-side surface of the second absorbent core 21 so as to surround the second absorbent core 21. The second non-skin side core wrap 23 is arranged to cover the non-skin side surface of the second absorbent core 21 from the non-skin side with respect to the folded back portion of the second skin side core wrap 22. In the following description, the second absorbent core 21, the second skin side core wrap 22 and the second non-skin side core wrap 23 will also be collectively referred to as second core portions 21 to 23.

The backsheet 24 is arranged on the non-skin side relative to the second non-skin side core wrap 23. The backsheet 24 is a liquid impermeable sheet material. As the liquid impermeable sheet, a synthetic resin film made of Polyethylene (PE) or polypropylene (PP), a composite sheet formed of a synthetic resin film and a nonwoven fabric sheet, or the like can be employed.

The second side sheet 25 is a pair of sheet members extending outward in the width direction from both end portions in the width direction of the skin-side surface of the second skin-side core wrap 22. The second side sheet 25 is a liquid-impermeable sheet, and a nonwoven sheet including hydrophobic fibers or the like may be used, similarly to the first side sheet 16. The back sheet 24 and the second side sheet 25 extend outward in the width direction beyond the first absorbent body 10 and the second core portions 21 to 23 and are connected to each other at portions extending beyond the second core portions 21 to 23.

The first absorbent body 10 and the second absorbent body 20 are connected with an adhesive a12 disposed on the skin-side surface of the second side sheet 25 and an adhesive A8 disposed between the second side sheet 25 and the second core portions 21 to 23 in the thickness direction. Specifically, the first side sheet 16 and the second side sheet 25 are connected with an adhesive a 12. Further, between a pair of second side sheets 25 arranged at intervals from each other in the width direction, the first core sections 11 to 13 and the second absorbent body 20 are connected with an adhesive A8.

Further, as shown in fig. 1, the planar shape of the first core portions 11 to 13 is rectangular. The second core portions 21 to 23 have a substantially rectangular planar shape in which both end portions in the longitudinal direction are bent and projected outward in the width direction. The first core portions 11 to 13 have a length in the width direction substantially equal to or slightly longer than the second core portions 21 to 23, and the first core portions have a length in the longitudinal direction shorter than the second core portions 21 to 23.

On the non-skin side surface of the back sheet 24, there is provided an anti-slip portion 30 (adhesive portion) to which a hot melt adhesive or the like is applied. The non-slip portion 30 is attached to the skin-side surface of the underwear of the wearer, and the pad 1 is used in a state of being fixed to the underwear. As shown in fig. 2, the slip prevention parts 30 respectively include a pair of central adhesive parts 31 arranged at intervals from each other in the width direction, and four side adhesive parts 32 arranged outside the central adhesive parts 31 in the width direction.

The central adhesive portions 31 each have a rectangular shape, have long sides in the longitudinal direction, and are arranged to extend continuously from one longitudinal end portion to the other longitudinal end portion of the mat 1 in the longitudinal direction. The side adhesive portions 32 each have a rectangular shape, have long sides in the longitudinal direction, and have a shorter longitudinal length than the central adhesive portion 31. Two side adhesive portions 32 of the four side adhesive portions 32 are arranged at one end portion in the longitudinal direction of the mat 1, and the remaining two side adhesive portions 32 are arranged at the other end portion in the longitudinal direction of the mat 1. In other words, the pair of side adhesive portions 32 are arranged apart from each other in the longitudinal direction, outside the central adhesive portion 31 in the width direction.

The pad 1 has a compressed portion 40 in which the pad 1 is depressed in the thickness direction. In the compression section 40 of the present embodiment, the members from the top sheet 14 of the first absorbent 10 to the second core sections 21 to 23 are compressed from the skin side in the thickness direction.

In the compressed portion 40, the thickness of the mat 1 is smaller than that of the surrounding portion, and the fiber density is higher than that of the surrounding portion. These comparisons are suggested to be performed using well known methods. For example, the thickness of each part of the pad 1 can be visually compared, or compared by using a dial thickness gauge ID-C1012C manufactured by Mitutoyo corporation or its equivalent at 3.0gf/cm ² Is pressed against the target portion. The density of each portion of the mat 1 can be compared based on a magnified image of a cross section in the thickness direction of the mat 1 obtained using an electron microscope or the like.

The compressing part 40 includes: a pair of first compressing portions 41 extending in the longitudinal direction and arranged at intervals from each other in the width direction; and a pair of second compressed portions 42 extending in the width direction between the pair of first compressed portions 41 and arranged at intervals from each other in the longitudinal direction. The first compression portions 41 respectively have a curved shape so as to protrude inward in the width direction in the longitudinal central portion of the pad 1 (i.e., in the region that contacts the crotch of the wearer). The second compressing portions 42 respectively have a curved shape to protrude outward in the longitudinal direction. However, the shape, number, and arrangement position of the compression portions 40 shown in fig. 1 are examples, and are not limited thereto. Further, the linear compressed portions 40 (41 and 42) extending in the longitudinal direction or the width direction may be groove-shaped compressed portions extending continuously in the direction in which the pad 1 is depressed, or may be compressed portions in which a plurality of dot-shaped compressed portions are arranged side by side in a row.

The basic configuration of the mat 1 has been described so far, but the configuration of the mat 1 described above is one example, and is not limited thereto. For example, the planar shape of the pad 1 may be a shape that is asymmetrical in the longitudinal direction, or the pad 1 does not necessarily comprise an intermediate sheet 15 or fragrance 17. Further, each of the first absorbent core 11 and the second absorbent core 21 may be surrounded by a single core wrap.

Hydrophobic region H and non-hydrophobic region N of pad 1

The multilayer absorbent 100 of the pad 1 has a hydrophobic portion that is hydrophobic and is located at a boundary portion between the first absorbent 10 and the second absorbent 20 in the thickness direction. Specifically, as shown in fig. 3 and 4, the multilayer absorbent 100 includes a second side sheet 25 which is hydrophobic and is located between the first absorbent 10 and the second absorbent 20 in the thickness direction. Fig. 4 is an enlarged view of a portion Z in fig. 3.

In the pad 1, the "boundary portion" between the first absorbent 10 and the second absorbent 20 refers to a portion between the non-skin-side surface of the first absorbent 10 and the skin-side surface of the second absorbent 20. The portion between the non-skin side surface of the first absorbent 10 and the skin side surface of the second absorbent 20 includes the non-skin side surface of the first absorbent 10 and the skin side surface of the second absorbent 20.

Further, each of the first absorber 10 and the second absorber 20 is not limited to the above-described configuration. For example, it is acceptable to construct the first absorbent 10 (second absorbent 20) only from the first absorbent core 11 (second absorbent core 21) without including the above-described core wrap 11 (22 and 23), or the first absorbent 10 (second absorbent 20) includes a part of a constituent member such as the above-described core wrap 11 (22 and 23), or is a member other than the above-described constituent member.

"hydrophobicity" refers to a property that a liquid is not easily diffused when the liquid is dropped on a surface, and preferably refers to a portion having a property that the dropped liquid is in a state where a contact angle is larger than 90 °. That is, the hydrophobic region H is a region where the movement of the liquid is reduced, and the non-hydrophobic region N is a region where the movement of the liquid is not hindered. The "hydrophobic portion" refers to a portion including a hydrophobic member, and the hydrophobic portion may be made of a hydrophobic sheet member such as the second side sheet 25, or may be a portion to which a hydrophobic agent is applied.

The second side sheet 25 is a hydrophobic nonwoven fabric. Further, as the hydrophobic fibers included in the hydrophobic nonwoven fabric sheet, any material used in the technical field, for example, olefin-based fibers such as Polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), etc. themselves or a combination thereof may be used without particular limitation.

As shown in fig. 1, 3, and 4, the multilayer absorbent body 100 includes, when the pad 1 is viewed in the thickness direction: a hydrophobic region H including a hydrophobic portion (second side sheet 25); and a non-hydrophobic region N that does not include a hydrophobic moiety. This enables the excreted fluid to move from the first absorbent 10 to the second absorbent 20 in the non-hydrophobic region N as indicated by the arrow S1 in fig. 4, while making it difficult for the excreted fluid to return to the first absorbent 10 once absorbed by the second absorbent 20 in the hydrophobic region H as indicated by the arrow S2 in fig. 4. This makes it possible to reduce the risk of the excreted fluid in the first absorbent 10 coming into contact with the skin of the wearer and causing discomfort to the wearer.

Specifically, in the non-hydrophobic region N, the excreted fluid can move from the first absorbent 10 to the second absorbent. Therefore, the discharged fluid that has been absorbed by the first absorbent 10 (first absorbent core 11) first moves from the first absorbent 10 to the second absorbent 20 in the non-hydrophobic region N and is absorbed by the second absorbent 20 (arrow S1 in fig. 4). In the hydrophobic region N, the hydrophobic second side sheet 25 makes it difficult for the excreted fluid that has been absorbed by the second absorbent 20 to return from the second absorbent 20 to the first absorbent 10 (arrow S2 in fig. 4). Therefore, the excreted fluid absorbed by the second absorbent 20 does not easily return to the first absorbent 10, and the risk of the excreted fluid in the first absorbent 10 coming into contact with the wearer's skin to cause discomfort to the wearer can be reduced.

Further, as shown in fig. 1, 3, and 4, it is preferable that, in an overlapping region X where the first absorbent body 10 and the second absorbent body 20 overlap each other when the pad 1 is viewed in the thickness direction, the overlapping region X has a portion Hx overlapping the water-repellent region H, and the overlapping region X has a portion Nx overlapping the non-water-repellent region N. The overlapping region X has a portion Hx overlapping the hydrophobic region H that allows the excreted fluid absorbed by the first absorbent 10 to move toward the second absorbent 20 (the direction of arrow S1 in fig. 4), and furthermore, has a portion Nx overlapping the hydrophobic region H so that the hydrophobic second side sheet 25 can reduce the return of the excreted fluid once it has been absorbed by the second absorbent 20 to the first absorbent 10 (arrow S2 in fig. 4). This reduces the migration of exudates from the second absorbent 20 to the first absorbent 10, so that the risk of discomfort to the wearer due to the return of excreted fluid to the first absorbent 10 can be reduced.

The pad 1 includes the first absorber 10 and the second absorber 20, but both end portions in the width direction of the first absorber 10 are not joined to the second absorber 20. That is, the pad 1 has a connecting portion 50 and a pair of separating portions 60, the connecting portion 50 being a portion located at the center in the width direction and in which the first absorbent 10 and the second absorbent 20 are connected to each other, and the pair of separating portions 60 being portions located at both end portions in the width direction and in which the first absorbent 10 and the second absorbent 20 are spaced from each other. Fig. 5 is an explanatory view showing the non-slip portion 30, the connecting portion 50, and the separating portion 60. Fig. 6 is a schematic sectional view showing an end portion in the width direction of the pad 1. In fig. 5, the connecting portion 50 and the non-slip portion 30 are shown in a state of overlapping in the thickness direction, and the outline of the connecting portion 50 is indicated by a thick line.

Specifically, as shown in fig. 3, the first absorbent 10 and the second absorbent 20 are connected with the adhesive a12 disposed between the first side sheet 16 and the second side sheet 25 and the adhesive A8 disposed between the first core portions 11 to 13 and the second core portions 21 to 23. Therefore, as shown in fig. 5, a region located inside the outer end in the width direction of the adhesive a12 is defined as the connecting portion 50. In the connecting portion 50, the adhesive is not limited to be arranged in the entire area, and the adhesive may be intermittently arranged in accordance with the application pattern of the adhesive.

In the pad 1 having the connecting portion 50 and the separating portion 60, as shown in fig. 6, the pair of separating portions 60 (both end portions in the width direction) of the first absorbent body 10 can rise toward the skin side with respect to the second absorbent body 20. Specifically, as shown in the cross-sectional view of fig. 4, the portion of the first absorbent 10 located outside the adhesive a12 connecting the first side sheet 16 and the second side sheet 25 in the width direction can rise toward the skin side.

By making the cross-sectional shape of the pad 1 dish-shaped, even if a relatively large amount of discharged fluid is discharged in the first absorbent 10, the ascending separation portion 60 of the first absorbent 10 can block the discharged fluid, and lateral leakage of the discharged fluid can be suppressed. Further, the inclined surface of the rising separation portion 60 causes the discharged fluid to be concentrated to the central portion in the width direction of the first absorbent 10, so that the discharged fluid is more easily absorbed and retained in the pad 1. Therefore, leakage of the drainage fluid from the pad 1 can be suppressed.

In the pad 1, the first absorber 10 and the second absorber 20 are spaced from each other in the separating portions 60 located at both end portions in the width direction, and therefore the first absorber 10 is more likely to be away from the second absorber 20 than in the case where the first absorber 10 and the second absorber 20 are in contact with each other, so that the excreted fluid absorbed by the second absorber 20 is less likely to return to the first absorber 10.

It is preferable that a pair of elastic strands 18 stretched and contracted in the longitudinal direction are arranged in both end portions in the width direction of the first absorbent 10 (in the pair of separated portions 60), and the elastic strands 18 respectively have portions overlapping with the separated portions 60 when the pad 1 is viewed in the thickness direction. The contraction of the elastic strands 18 enhances the lifting ability of the discrete portions 60 of the first absorbent 10 and, as shown in figure 6, the cross-sectional shape of the pad 1 is dish-shaped. That is, the elastic strands 18 make it easier for the first absorbent 10 and the second absorbent 20 to be spaced apart from each other in the separation section 60, which makes it less easy for excreted fluid absorbed by the second absorbent 20 to return to the first absorbent 10. The elastic cord 18 may be arranged in the entire longitudinal area of the separating portion 60 and provided to be elongated in the longitudinal direction. Or the elastic cord 18 may be arranged in a part of the separating portion 60 in the longitudinal direction as in the present embodiment.

Further, a portion in which the first absorbent core 11 is not arranged is provided outside the first absorbent 10 in the width direction. That is, as shown in fig. 4, in the pad 1, the widthwise outer end portions of the first side pieces 16 extend widthwise outward beyond the end edges of the first core portions 11 to 13. At this time, each elastic cord 18 is interposed between the skin-side nonwoven fabric (16 a) and the non-skin-side nonwoven fabric (16 b), preferably in the thickness direction. In the first side sheet 16 that has been folded once in the width direction, a portion on the skin side is defined as a skin-side nonwoven fabric 16a, and a portion on the non-skin side is defined as a non-skin-side nonwoven fabric 16b. The skin-side nonwoven fabric 16a and the non-skin-side nonwoven fabric 16b are joined with the adhesives A6 and A7, with the elastic cord 18 interposed between the

nonwoven fabrics

16a and 16b. Therefore, compared with the case where the first absorbent core 11 is arranged to extend to reach the end portions in the width direction of the separating portion 60, the rising ability of the separating portion 60 is enhanced, and a concave shape in which the central portion in the width direction is depressed is formed, so that leakage of the excreted fluid can be suppressed.

It should be noted that the first side sheet 16, which is a hydrophobic nonwoven sheet, is disposed in most of the skin-side surface of the separating portion 60. The first side sheet 16 is made of a nonwoven fabric including hydrophobic fibers. As the hydrophobic fiber, any material used in the technical field may be used without particular limitation, for example, olefin-based fibers such as Polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), and the like by themselves or in combination thereof. The skin-side nonwoven fabric 16a located farthest on the skin-side surface of the separating portion 60 has a hydrophobic portion, which makes it possible to suppress the leakage of excrement outward in the width direction of the pad 1.

By providing a plurality of hydrophobic portions in the boundary portion between the first absorbent 10 and the second absorbent 20, it is possible to further increase the hydrophobicity and prevent excreted fluid once having been absorbed by the second absorbent 20 from returning to the first absorbent 10. In the pad 1, the non-skin side nonwoven fabric 16b (which is a hydrophobic nonwoven fabric sheet) of the first side sheet 16 is disposed in the boundary portion between the first absorbent body 10 and the second absorbent body 20, except that the second side sheet 25 (which is a hydrophobic nonwoven fabric sheet) is a hydrophobic portion. That is, two hydrophobic portions, i.e., the second side sheet 25 and the non-skin side nonwoven fabric 16b, are provided in the hydrophobic region N, and therefore, the hydrophobicity of the hydrophobic region N is enhanced.

Further, as shown in fig. 4, 5, etc., it is preferable that the non-hydrophobic region N has a portion that does not overlap with the separation portion 60 when the pad 1 is viewed in the thickness direction. More preferably, the non-hydrophobic region N may be provided only in a portion where the non-hydrophobic region N overlaps with the connection portion 50 when the pad 1 is viewed in the thickness direction. This makes it easier for the discharged fluid to move from the first absorbent 10 to the second absorbent 20.

Preferably, the water-repellent region H has a portion overlapping with the separation portion 60 when the pad 1 is viewed in the thickness direction. More preferably, the entire area of each separated portion 60 overlaps the hydrophobic region H when the pad 1 is viewed in the thickness direction. For example, even when the wearer applies body pressure in the thickness direction of the pad 1 and the separation between the first absorbent body 10 and the second absorbent body 20 is reduced, the hydrophobic region H located in the portion overlapping with the separation portion 60 makes it possible to reduce the risk of the excreted fluid absorbed by the second absorbent body 20 returning to the first absorbent body 10.

Preferably, each of the non-slip portions 30 has a portion overlapping with the separation portion 60 when the mat 1 is viewed in the thickness direction. In the present embodiment, a part (a portion 321 shown in fig. 5) of the center side in the longitudinal direction of the side adhesive part 32 overlaps with the separation part 60. In this case, even if the separation portion 60 is deformed, the second absorbent body 20 becomes easier to return to the original position (in the vicinity of the edge of the undergarment) due to the restoring force of the undergarment, and the separation between the first absorbent body 10 and the second absorbent body 20 is easier to maintain. This makes it less likely that excreted fluid once having been absorbed by the second absorbent 20 will return to the first absorbent 10, as compared with the case where the first absorbent 10 and the second absorbent 20 are in contact with each other.

Preferably, the first absorbent 10 has a recessed portion (compressed portion 40) recessed from the skin side toward the non-skin side, and the first absorbent 10 has no recessed portion in the water-repellent area H when the pad 1 is viewed in the thickness direction. The "groove portion" is a portion recessed in the thickness direction, and examples thereof include a recessed portion formed by making a recess in advance, or a recessed portion formed by cutting, or a recessed portion formed by compression, and the like. The grooved portions provided in the first absorbent 10 facilitate movement of discharged fluid from the skin side of the first absorbent 10 to the non-skin side, and in association therewith, movement of discharged fluid between the first absorbent 10 and the second absorbent 20. On the other hand, in the case where the groove portions are provided in the hydrophobic region H, there is a risk that a larger amount of discharged fluid is moved into the second absorbent 20 in the hydrophobic region H, and when a force is applied in the thickness direction due to the body pressure of the wearer or the like, the discharged fluid is more likely to return toward the first absorbent 10. In this regard, the groove portions are not provided in the hydrophobic region H, so that the discharged fluid absorbed by the second absorbent 20 is less likely to return to the first absorbent 10.

On the other hand, it is more preferable that the groove portions located in the non-hydrophobic region N are provided from the first absorber 10 to the second absorber 20 in the thickness direction. The provision of the grooved portions from the first absorbent 10 to the second absorbent 20 makes it easier to draw the discharged fluid to the second absorbent 20, which makes it easier and faster to transfer the discharged fluid from the first absorbent 10 to the second absorbent 20.

It is preferable that the compressed portion 40 compressed in the thickness direction is provided as a groove portion, and it is preferable that the compressed portion 40 is provided in the non-hydrophobic region N when the pad 1 is viewed in the thickness direction, as shown in fig. 1. In the compressed portion 40, the fiber density of the mat 1 is higher than the surroundings. Therefore, by providing the compressed portions 40 in the pad 1, not only is the pad depressed in the thickness direction, but also the capillary phenomenon makes the excreted fluid more easily absorbed, and accordingly, the excreted fluid is rapidly transferred from the first absorbent 10 to the second absorbent 20. Therefore, the discharged fluid can be prevented from overflowing and leaking from the pad 1 because the first absorbent 10 cannot completely absorb the discharged fluid. Further, the compressed portions 40 make the shape of the pad 1 less likely to collapse, and the absorber is less likely to be distorted. In the compression section 40 of the present embodiment, the members from the top sheet 14 to the second core sections 21 to 23 are compressed from the skin side to the non-skin side.

However, the configuration is not limited to this, and the compressed portion 40 may be a portion that compresses the first absorber 10 and the second absorber 20 separately. Further, the mat 1 may comprise: compressed portions of the first absorbent 10 and the second absorbent 20 are compressed separately; and a compressed portion extending from the first absorbent 10 to the second absorbent 20.

Preferably, the superabsorbent polymer (SAP) of the first absorbent core 11 has a weight per unit area (g/m) ² ) Greater than the weight per unit area of the superabsorbent polymer of the second absorbent core 21. In general, superabsorbent polymers (SAPs) have a high water retention for excreted fluids or the like. Therefore, the water-retention property of the first absorbent core 11 can be enhanced as compared with the case where the weight per unit area of the SAP of the second absorbent core is higher than the weight per unit area of the SAP of the first absorbent core 11. Therefore, the risk of the excreted fluid absorbed by the first absorbent core 11 returning to the skin-side surface of the first absorbent core 11 and coming into contact with the wearer's skin can be reduced. SAP basis weight (g/m) ² ) Is obtained by cutting predetermined regions from the first absorbent core 11 and the second absorbent core 21 as samples, taking out SAP from each sample, and dividing the weight of the taken-out SAP by the area of each sample.

More preferably, the first absorbent core 11 has superabsorbent polymers (SAP) without having small basis weight pulp fibers or without having pulp fibers. The first absorbent core 11 of the pad 1 is formed only by SAP. By reducing the weight per unit area of the pulp fibers in the first absorbent core 11 or setting the weight per unit area of the pulp fibers in the first absorbent core 11 to zero, the thickness of the first absorbent core 11 becomes small while enhancing the water retentivity of the first absorbent core 11, making the first absorbent body 10 less likely to be distorted.

Further, as with the pad 1, the second absorbent core 21 preferably has a Super Absorbent Polymer (SAP) and pulp fibers. Pulp fibers have the property of readily drawing up liquids. Therefore, the excreted fluid absorbed by the first absorbent 10 is more easily absorbed into the second absorbent 20 by the pulp fibers of the second absorbent 20, which makes it possible to suppress the excreted fluid from spilling and leaking out of the pad 1. Then, the discharged fluid sucked into the pulp fibers is more easily retained by the Super Absorbent Polymers (SAP) contained in the second absorbent body 20, which makes it possible to reduce the return of the discharged fluid absorbed by the second absorbent body 20 to the first absorbent body 10. The second absorbent body 20 has SAP and pulp fibers, which can be confirmed by a generally known method such as a method of visually confirming the surface or cross section of the second absorbent core 21 or a method of confirming the surface or cross section on an image projected with an optical microscope.

It should be noted that a configuration in which the second absorbent core 21 has pulp fibers and does not have a Super Absorbent Polymer (SAP) is acceptable. Pulp fibers absorb liquid more easily and have better liquid spreading properties than superabsorbent polymers (SAPs). Therefore, in the second absorbent core 21 having pulp fibers without superabsorbent polymers (SAPs), the diffusion of discharged fluid is not hindered by the SAPs, compared with the case of having superabsorbent polymers (SAPs). Therefore, the discharged fluid is widely diffused in the planar direction of the second absorbent core 21. Therefore, the excreted fluid is more easily and rapidly absorbed in a wider range of the second absorbent core 21, and the absorbency of the second absorbent core 21 is effectively utilized.

Further, it is preferable that the maximum absorption amount of the discharged fluid by the second absorbent 20 is larger than that of the first absorbent 10. In this case, the excreted fluid transferred from the first absorbent 10 to the second absorbent 20 can be absorbed and retained by the second absorbent 20, which makes it possible to suppress the return (rewet) of the excreted fluid to the first absorbent 10. Thus, the risk of leakage and spillage of excreted fluid from the pad 1 due to the first absorbent 10 not being able to absorb the excreted fluid completely can be reduced. Further, the second absorbent 20 disposed on the non-skin side relative to the first absorbent 10 can absorb a larger amount of discharged fluid, thereby reducing the amount of discharged fluid absorbed by the first absorbent 10 closer to the wearer's skin. Thus, discomfort to the wearer's skin from the fluid being discharged is further reduced, improving the comfort of the pad 1.

The maximum absorption amount of the discharged fluid in the first absorbent 10 and the second absorbent 20 can be determined according to, for example, the following methods: water absorption Capacity test method of super absorbent resin according to JIS K7223 (1996). In short, samples (e.g., 0.20 g or 1.00 g) are cut out from the first and second

absorbent cores

11 and 21 respectively positioned in the first and second

absorbent bodies

10 and 20 to be measured. The mass of each sample is defined as a (g). The samples were then placed in a teabag made of a 250 mesh nylon mesh. The tea bag was immersed in a test liquid (deionized water or 0.9 mass% saline) for 1 hour. Thereafter, the tea bag is hung and drained (e.g., 10 minutes). The weight of the drained teabag is defined as b (g). Further, similarly, the weight c (g) of the empty tea bag after being immersed in the test liquid and drained was measured. It is recommended to perform the above operation a plurality of times (e.g., five times) to obtain the average values a to c (g) of the measured values. The absorption amount W (g/g) per gram of the sample was calculated by the formula "W = (b-c-a)/a". A value obtained by multiplying the absorption amount W (g/g) of each sample by the mass (g) of the first absorbent core 11 and the mass (g) of the second absorbent core 21 is calculated. It is recommended to compare the calculated value as the maximum absorption amount (saturated absorption amount) of the first absorbent 10 and the second absorbent 20. It should be noted that if the weight per unit area and the like differ depending on the position of the plane in the absorbent core, it is recommended, for example, to use the entire absorbent core as a sample.

Other embodiments

In the above-described embodiment, the case where the length in the width direction of the first absorbent core 11 is substantially equal to the length in the width direction of the second absorbent core 21, or the length in the width direction of the first absorbent core 11 is slightly shorter than the length in the width direction of the second absorbent core 21 is described. The invention is not so limited. For example, as shown in fig. 7, the pad 1S may have a structure in which the length in the width direction of the first absorbent core 11 (first absorbent 10) is significantly shorter than the length in the width direction of the second absorbent core 21 (second absorbent 20). Fig. 7 is a plan view of the pad 1S according to another embodiment when viewed from the skin side. Fig. 8 is a schematic cross-sectional view of a pad 1S according to another embodiment. Hereinafter, in another embodiment, portions common to the configuration of the above-described pad 1 are denoted by the same reference numerals and the like, and detailed description thereof will be omitted.

Similar to the above-described embodiment, the pad 1S includes a multilayer absorbent body 100, a pair of first side sheets 16, a pair of second side sheets 25, and a back sheet 24. The multilayer absorbent body 100 includes: a first absorber 10S; and a second absorbent body 20S arranged on the non-skin side in the thickness direction with respect to the first absorbent body 10S.

As shown in fig. 7 and 8, the first absorbent 10S has a shorter length in the width direction than the second absorbent 20S. Similarly, the lengths of the members arranged on the skin side with respect to the second side sheet 25 (e.g., the top sheet 14) are respectively shorter than the lengths in the width direction of the respective members of the above-described diaper 1.

The pad 1S has a hydrophobic portion that is hydrophobic and is located at a boundary portion between the first absorbent 10S and the second absorbent 20 in the thickness direction. Specifically, as shown in fig. 8, the multilayer absorbent 100 includes a second side sheet 25 positioned between the first absorbent 10S and the second absorbent 20S in the thickness direction, the second side sheet being hydrophobic. As shown in fig. 7, when the pad 1 is viewed in the thickness direction, the multilayer absorbent body includes a hydrophobic region H including the second side sheet 25 as a hydrophobic portion and a non-hydrophobic region N not including the hydrophobic portion. Therefore, in the hydrophobic region H of the overlap region X, the excreted fluid absorbed by the second absorbent body 20S is less likely to return to the first absorbent body 10S, and the risk of discomfort to the wearer can be reduced. On the other hand, in the water-repellent region H of each non-overlapping region Y, the side end portion of the second absorbent 20S does not overlap with the first absorbent 10S when the pad 1S is viewed from the thickness direction. Also, in the hydrophobic region H of the non-overlapping region Y, the second side sheet 25 as a hydrophobic portion can reduce the return of the excreted fluid from the second absorbent body 20S to the skin-side surface, so that the risk of leakage of the excreted fluid from the pad 1S can be reduced.

Further, as shown in fig. 7, when the pad 1S is viewed in the thickness direction, a region where the first absorber 10S and the second absorber 20S overlap with each other is defined as an overlapping region X, and a region where the first absorber 10S and the second absorber 20S do not overlap with each other is defined as a non-overlapping region Y. At this time, it is preferable that the hydrophobic region H is disposed in the non-overlapping region Y, and the non-hydrophobic region N is disposed in the overlapping region X. In this case, in the non-hydrophobic region N provided in the overlap region X, the excreted fluid absorbed by the first absorbent 10S can move toward the second absorbent 20. On the other hand, in the hydrophobic region H located in the non-overlapping region Y, the hydrophobic portion (second side sheet 25) reduces the return of the excreted fluid absorbed by the second absorbent body 20S to the first absorbent body 10S, and therefore the risk of discomfort to the wearer due to the return of the excreted fluid from the second absorbent body 20S to the first absorbent body 10S can be reduced.

In the pad 1S shown in fig. 7 and 8, the water-repellent region H and the non-water-repellent region N are disposed in the overlapping region X, and only the water-repellent region H is disposed in the non-overlapping region Y. However, it is not limited to such a configuration. Such a configuration is also acceptable: wherein the overlapping region X includes only the non-hydrophobic region N, and the non-overlapping region Y includes the hydrophobic region H and the non-hydrophobic region N.

It should be noted that, as another embodiment, a configuration is described in which the length in the width direction of the first absorbent 10 is significantly shorter than the length in the width direction of the second absorbent 20. However, it is not limited to such a configuration, and the length in the width direction of the first absorber 10 may be significantly longer than the length in the width direction of the second absorber 20. When the length of the first absorbent 10 in the width direction is longer than the length of the second absorbent 20 in the width direction, the first absorbent 10 has a portion overlapping the non-overlapping region Y when the pad 1 is viewed in the thickness direction. In this case, even when a force is applied to a portion overlapping with the non-overlapping area Y in the thickness direction due to a change in the sitting posture of the wearer or the like, the hydrophobic area H located in the non-overlapping area Y can reduce the risk of leakage of excreted fluid absorbed by the first absorbent 10 from the non-skin side surface of the first absorbent 10 to the non-skin side on the non-skin side surface of the first absorbent overlapping with the non-overlapping area Y.

Other embodiments

Although the above-described embodiments of the present invention have been described, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the explanation of the present invention. Further, the present invention may be modified or improved without departing from the spirit thereof, and it is needless to say that equivalents thereof are also included in the present invention.

In the above-described embodiment, by making the second side sheet 25 a hydrophobic portion, and by using the non-skin side nonwoven fabric 16b (which is a hydrophobic nonwoven fabric sheet) of the first side sheet 16, the hydrophobicity of the hydrophobic region H is enhanced. The invention is not so limited. In the case where the pad 1 has the hydrophobic second side sheet 25, the provision of the non-skin side nonwoven fabric 16b of the first side sheet 16 is not essential, and the non-skin side nonwoven fabric 16b may be a hydrophilic sheet member. Alternatively, a configuration may also be accepted in which the pad 1 does not include the hydrophobic second side sheet 25, and the non-skin side nonwoven fabric 16b of the hydrophobic first side sheet 16 is arranged as a hydrophobic portion. In this case, since the use of the second side sheet 25 is not necessary, the material of the mat 1 can be reduced to reduce the manufacturing cost.

Further, in the above-described embodiment, both end portions in the width direction of the second absorbent body 20 overlap with the second side sheet 25 when the pad 1 is viewed in the thickness direction, and have a pair of hydrophobic regions H. However, it is not limited to such a configuration. The hydrophobic regions H may be disposed in any number and at any location. For example, the water-repellent region H may be provided in a region overlapping with the longitudinal one-side end portion or the longitudinal other-side end portion of the second absorbent body 20 when the pad 1 is viewed in the thickness direction. Further, the water-repellent region H may be provided only in a region overlapping with a region where the first absorbent body 10 and the second absorbent body 20 do not overlap with each other (non-overlapping region Y) when the pad 1 is viewed in the thickness direction.

List of reference numerals

1: pad (light incontinence pad, absorbent article), 10: first absorber, 11: first absorbent core, 12: first skin side core wrap, 13: first non-skin side core wrap, 14: top sheet, 15: intermediate sheet, 16: first side sheet (hydrophobic portion), 16a: skin side nonwoven fabric, 16b: non-skin side nonwoven fabric, 18: elastic cord (elastic member), 20: second absorber, 21: second absorbent core, 22: second cutaneous side core wrap, 23: second non-skin side core wrap, 24 backsheet, 25: second side sheet (hydrophobic portion), 30: non-slip portion (adhesive portion), 31: central adhesive portion, 32: side adhesive portion, 40: compression portion (groove portion), 41: first compression portion (groove portion), 42: second compression portion, 50: connection portion, 60: separation section, 100: multilayer absorbent body, H: hydrophobic region, N: non-hydrophobic region, X: overlap region, Y: a non-overlapping region.

The claims (modification according to treaty clause 19)

1. An absorbent article having a longitudinal direction, a width direction, and a thickness direction,

the absorbent article includes:

a multilayer absorbent body comprising:

a first absorbent having a first absorbent core, an

A second absorbent body having a second absorbent core and disposed on a non-skin side in a thickness direction with respect to the first absorbent body,

the multilayer absorbent body has a hydrophobic region and a non-hydrophobic region in a thickness direction in a boundary portion between the first absorbent body and the second absorbent body when viewed in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including a hydrophobic portion, the absorbent article having:

an overlap region in which the first absorbent and the second absorbent overlap each other, an

A non-overlapping region in which the first absorbent and the second absorbent do not overlap each other,

the hydrophobic region is disposed in a non-overlapping region,

the non-hydrophobic region is disposed in the overlap region.

2. The absorbent article of claim 1, wherein

The overlapping region has a portion overlapping with the water-repellent region when viewed in the thickness direction.

3. An absorbent article having a longitudinal direction, a width direction, and a thickness direction,

the absorbent article includes:

a multilayer absorbent body comprising:

a first absorbent having a first absorbent core, an

the multilayer absorbent body has a hydrophobic region and a non-hydrophobic region in a thickness direction in a boundary portion between the first absorbent body and the second absorbent body when viewed in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including the hydrophobic portion, an adhesive portion provided on a non-skin side surface of the second absorbent body,

the absorbent article has a connecting portion and a pair of separating portions at least at predetermined positions in the longitudinal direction,

the connecting portion is a portion which is provided in a central portion in the width direction and in which the first absorber and the second absorber are connected,

the pair of separation portions are portions that are provided in both end portions in the width direction and in which the first absorber and the second absorber are spaced apart from each other.

4. The absorbent article of claim 3, wherein

The non-hydrophobic region has a portion that does not overlap with the separation portion when viewed in the thickness direction.

5. The absorbent article of claim 3 or 4, wherein

The adhesive portion has a portion overlapping with the separation portion when viewed in the thickness direction.

6. The absorbent article according to any one of claims 3 to 5, wherein

The hydrophobic region has a portion overlapping with the separation portion when viewed in the thickness direction.

7. The absorbent article according to any one of claims 3 to 6, wherein

A pair of elastic members stretched and contracted in the longitudinal direction are arranged in both end portions in the width direction of the first absorbent, and

each elastic member has a portion overlapping the separation portion when viewed in the thickness direction.

8. The absorbent article of claim 7, wherein

A portion where the first absorbent core is not arranged is provided in both end portions in the width direction of the first absorbent, and

in the portion where the first absorbent core is not arranged, the elastic member is interposed between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric in the thickness direction.

9. The absorbent article of claim 8, wherein

The hydrophobic portion is a non-skin side nonwoven fabric.

10. The absorbent article according to any one of claims 1 to 9, wherein

In the water-repellent region, a plurality of water-repellent portions are arranged side by side with respect to the thickness direction.

11. An absorbent article having a longitudinal direction, a width direction, and a thickness direction,

the absorbent article includes:

a multilayer absorbent body comprising:

a first absorbent having a first absorbent core, an

the multilayer absorbent has a hydrophobic region and a non-hydrophobic region in a thickness direction in a boundary portion between a first absorbent and a second absorbent when viewed in the thickness direction, the hydrophobic region including hydrophobic portions, the non-hydrophobic region not including hydrophobic portions, the first absorbent having grooved portions that are recessed from a skin side toward a non-skin side,

the groove portion is not present in the hydrophobic region when viewed in the thickness direction.

12. The absorbent article of claim 11, wherein

The groove portion is provided from the first absorber to the second absorber in the thickness direction.

13. The absorbent article according to any one of claims 1 to 12, wherein

The superabsorbent polymer of the first absorbent core has a weight per unit area that is greater than the weight per unit area of the superabsorbent polymer of the second absorbent core.

14. The absorbent article according to any one of claims 1 to 13, wherein

The second absorbent core has superabsorbent polymer and pulp fibers.

15. The absorbent article according to any one of claims 1 to 13, wherein

The second absorbent core has pulp fibers and does not have superabsorbent polymers.

16. The absorbent article according to any one of claims 1 to 15, wherein

The second absorbent has a greater maximum absorption of the discharged fluid than the first absorbent.

Claims

1. An absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article comprising:

a multilayer absorbent body comprising:

a first absorbent having a first absorbent core, an

the multilayer absorbent body has a hydrophobic region and a non-hydrophobic region in a thickness direction in a boundary portion between the first absorbent body and the second absorbent body when viewed in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including a hydrophobic portion.

2. The absorbent article of claim 1, wherein

The absorbent article has an overlapping region where the first absorbent and the second absorbent overlap with each other when viewed in the thickness direction,

the overlapping region has a portion overlapping with the water-repellent region when viewed in the thickness direction, and

the overlapping region has a portion that also overlaps with the non-hydrophobic region when viewed in the thickness direction.

3. The absorbent article of claim 1, wherein

The absorbent article has:

an overlapping region in which the first absorbent and the second absorbent overlap with each other when viewed in the thickness direction, an

A non-overlapping region in which the first absorbent and the second absorbent do not overlap with each other when viewed in the thickness direction,

the water-repellent region is disposed in the non-overlapping region, and

the non-hydrophobic region is disposed in the overlapping region.

4. The absorbent article according to any one of claims 1 to 3, wherein

An adhesive part is provided on the non-skin side surface of the second absorbent body, and

5. The absorbent article of claim 4, wherein

6. The absorbent article of claim 4 or 5, wherein

7. The absorbent article according to any one of claims 4 to 6, wherein

8. The absorbent article according to any one of claims 4 to 7, wherein

9. The absorbent article of claim 8, wherein

10. The absorbent article of claim 9, wherein

The hydrophobic portion is a non-skin side nonwoven fabric.

11. The absorbent article according to any one of claims 1 to 10, wherein

12. The absorbent article according to any one of claims 1 to 10, wherein

The first absorbent has a groove portion depressed from the skin side to the non-skin side, and

13. The absorbent article of claim 12, wherein

14. The absorbent article according to any one of claims 1 to 13, wherein

The superabsorbent polymer of the first absorbent core has a greater weight per unit area than the superabsorbent polymer of the second absorbent core.

15. The absorbent article according to any one of claims 1 to 14, wherein

The second absorbent core has superabsorbent polymers and pulp fibers.

16. The absorbent article of any one of claims 1 to 14, wherein

17. The absorbent article according to any one of claims 1 to 16, wherein