Absorbent article

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

Description

[0001] This application is a divisional application of the patent application with the application date of May 19, 2021, the application number of 202180033756.4 (international application number of PCT / JP2021 / 018925), and the invention name of "Absorbent article". TECHNICAL FIELD

[0002] The present invention relates to an absorbent article. BACKGROUND

[0003] As an absorbent article that absorbs excretions such as urine, sanitary napkins, light incontinence pads, and the like are known. For example, Patent Literature 1 discloses an absorbent article in which a liquid diffusion sheet that is hydrophilic is provided between an upper layer absorbent and a lower layer absorbent, excreted fluid absorbed in the upper layer absorbent is diffused flat by the liquid diffusion sheet, and then is absorbed by the lower layer absorbent.

[0004] LIST OF CITATIONS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Publication No. 2013-106634 SUMMARY

[0007] PROBLEMS

[0008] In the absorbent article described in Patent Literature 1, there is a risk that excreted fluid that has been absorbed by the lower layer absorbent returns to the upper layer absorbent, and the wearer is uncomfortable due to the excreted fluid that has returned to the upper layer absorbent.

[0009] The present invention was achieved in view of the conventional problems such as the above, and one aspect of the present invention is to provide an absorbent article that reduces the return of excreted fluid absorbed by a second absorbent to a first absorbent.

[0010] SOLUTION TO THE PROBLEM

[0011] One main aspect for achieving the above aspect of the present invention is an absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article including: a multilayer absorbent including: a first absorbent having a first absorbent core; and a second absorbent having a second absorbent core and disposed in the thickness direction on a non-skin side with respect to the first absorbent, wherein, when viewed in the thickness direction, the multilayer absorbent has a hydrophobic region and a non-hydrophobic region in a boundary portion between the first absorbent and the second absorbent in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including the hydrophobic portion.

[0012] Other features of the present application will become apparent from a review of the description of the application and the appended drawings.

[0013] Advantages of the present application

[0014] According to the present application, although the multi-layer absorbent absorbs more excretion fluid, the hydrophobic region can be able to make the excretion fluid absorbed by the second absorbent less likely to return to the first absorbent, which can reduce the risk of discomfort to the wearer due to the excretion fluid leaking from the absorbent article or the excretion fluid absorbed by the second absorbent returning to the first absorbent. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a plan view of the light incontinence pad 1 when viewed from the skin side in a stretched state.

[0016] Figure 2 is a plan view of the pad 1 when viewed from the non-skin side in a stretched state.

[0017] Figure 3 is a schematic cross-sectional view of the pad 1 taken along the line I-I in Figure 1

[0018] Figure 4 is an enlarged view of the portion Z in Figure 3

[0019] Figure 5

[0020] Figure 6 is a schematic cross-sectional view showing an end portion in the width direction of the pad 1.

[0021] Figure 7 is a plan view of the pad 1S according to another embodiment when viewed from the skin side.

[0022] Figure 8 is a schematic cross-sectional view of the pad 1S according to another embodiment. DETAILED DESCRIPTION

[0023] At least the following matters will become clear through the description of the present specification and the drawings.

[0024] ​​​An absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article including: a multilayer absorbent body including: a first absorbent body having a first absorbent core; and a second absorbent body having a second absorbent core and arranged in the thickness direction with respect to the first absorbent body on a non-skin side, the multilayer absorbent body having a hydrophobic region and a non-hydrophobic region in a boundary portion between the first absorbent body and the second absorbent body in the thickness direction when viewed in the thickness direction, the hydrophobic region including a hydrophobic portion, the non-hydrophobic region not including the hydrophobic portion.

[0025] According to the above-described absorbent article, the multilayer absorbent body is able to absorb more excreted fluid, and the hydrophobic region makes it less likely for the excreted fluid absorbed by the second absorbent body to return to the first absorbent body. Thus, it is possible to reduce the risk of discomfort to the wearer due to leakage of the excreted fluid from the absorbent article, or return of the excreted fluid absorbed by the second absorbent body to the first absorbent body.

[0026] In such an absorbent article, it is desirable that the absorbent article have an overlapping region in which the first absorbent body and the second absorbent body overlap each other when viewed in the thickness direction, the overlapping region have a portion overlapping the hydrophobic region when viewed in the thickness direction, and the overlapping region have a portion also overlapping the non-hydrophobic region when viewed in the thickness direction.

[0027] According to the above-described absorbent article, since the overlapping region has a portion overlapping the non-hydrophobic region, the excreted fluid absorbed by the first absorbent body is moved to the second absorbent body. And, the overlapping region has a portion overlapping the hydrophobic region, the hydrophobic region makes it less likely for the excreted fluid absorbed by the second absorbent body to return to the first absorbent body. This makes it possible to reduce the risk of discomfort to the wearer due to leakage of the excreted fluid from the absorbent article, or return of the excreted fluid absorbed by the second absorbent body to the first absorbent body.

[0028] In such an absorbent article, it is desirable that the absorbent article have: an overlapping region in which the first absorbent body and the second absorbent body overlap each other when viewed in the thickness direction; and a non-overlapping region in which the first absorbent body and the second absorbent body do not overlap each other when viewed in the thickness direction, the hydrophobic region is provided in the non-overlapping region, and the non-hydrophobic region is provided in the overlapping region.

[0029] According to the above-described absorbent article, the first absorbent body and the second absorbent body absorb more of the excreted fluid. Also, in the overlapping region, the excreted fluid absorbed by the first absorbent body is moved to the second absorbent body, and in the non-overlapping region, the risk of the excreted material absorbed by the second absorbent body being moved to the skin side with respect to the second absorbent body can be reduced. Thus, the risk of the excreted fluid leaking out of the absorbent article can be reduced. Furthermore, in the case where the first absorbent body is larger than the second absorbent body, even if a force is applied in the thickness direction to the portion overlapping with the non-overlapping region due to a change in the sitting posture of the wearer or the like, on the non-skin side surface of the first absorbent body overlapping with the non-overlapping region when viewed in the thickness direction, the hydrophobic region located in the non-overlapping region makes it possible to reduce the risk of the excreted material absorbed by the first absorbent body leaking to the non-skin side from the non-skin side surface of the first absorbent body.

[0030] In such an absorbent article, it is desirable that the adhesive portion be provided on the surface of the non-skin side of the second absorbent body, and the absorbent article have a connection portion and a pair of separation portions at least at a predetermined position in the longitudinal direction, the connection portion being a portion provided in a center portion in the width direction and in which the first absorbent body and the second absorbent body are connected, and the pair of separation portions being portions provided in two end portion portions in the width direction and in which the first absorbent body and the second absorbent body are spaced apart from each other.

[0031] According to the above-described absorbent article, in the separation portion, the excreted fluid absorbed by the second absorbent body is less likely to return to the first absorbent body than in the case where the first absorbent body and the second absorbent body are in contact with each other.

[0032] In such an absorbent article, it is desirable that the non-hydrophobic region have a portion that does not overlap with the separation portion when viewed in the thickness direction.

[0033] According to the above-described absorbent article, the risk of hindering the movement of the excreted fluid from the first absorbent body to the second absorbent body can be reduced.

[0034] In such an absorbent article, it is desirable that the adhesive portion have a portion that overlaps with the separation portion when viewed in the thickness direction.

[0035] According to the above-described absorbent article, the second absorbent body is more likely to follow the movement of the undergarment to which the absorbent article is adhered by the adhesive portion. Thus, in the separation portion, the return of the excreted fluid absorbed by the second absorbent body to the first absorbent body can be further reduced than in the case where the first absorbent body and the second absorbent body are in contact with each other.

[0036] In such an absorbent article, it is desirable that the hydrophobic region have a portion that overlaps with the separation portion when viewed in the thickness direction.

[0037] According to the absorbent article described above, 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 body to the first absorbent body when viewed in the thickness direction.

[0038] In such an absorbent article, it is desirable that a pair of elastic members that stretch and contract in the longitudinal direction be arranged in the two end portion portions in the width direction of the first absorbent body, and each of the elastic members have a portion overlapping with the separation portion when viewed in the thickness direction.

[0039] According to the absorbent article described above, the contraction of the elastic members makes it easier for the first absorbent body and the second absorbent body to be spaced apart from each other in the separation portion, which makes it possible to reduce the return of the excreted fluid absorbed by the second absorbent body to the first absorbent body.

[0040] In such an absorbent article, it is desirable that portions in which the first absorbent core is not arranged be provided in the two end portion portions in the width direction of the first absorbent body, and in the portions in which the first absorbent core is not arranged, the elastic members be interposed between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric in the thickness direction.

[0041] According to the absorbent article described above, the elastic members make it easier for the two end portion portions in the width direction of the first absorbent body to rise, which makes the central portion in the width direction concave, making it possible to reduce the risk of excreted fluid leaking from the absorbent article.

[0042] In such an absorbent article, it is desirable that the hydrophobic portion be the non-skin-side nonwoven fabric.

[0043] According to the absorbent article described above, since it is not necessary to provide a new material as the hydrophobic portion, it is possible to reduce manufacturing costs.

[0044] In such an absorbent article, it is desirable that, in the hydrophobic region, a plurality of hydrophobic portions be arranged side by side with respect to the thickness direction.

[0045] According to the absorbent article described above, it is possible to further reduce the return of the excreted fluid that has been absorbed by the second absorbent body to the first absorbent body.

[0046] In such an absorbent article, it is desirable that the first absorbent body have a recessed groove portion that is recessed from the skin side toward the non-skin side, and that the recessed groove portion be absent from the hydrophobic region when viewed in the thickness direction.

[0047] According to the absorbent article described above, the recessed groove portion in the hydrophobic region can inhibit the movement of the excreted fluid between the first absorbent body and the second absorbent body, and this can make the excreted fluid absorbed by the second absorbent body less likely to return to the first absorbent body.

[0048] In such an absorbent article, it is desirable that the groove portion be provided in the thickness direction from the first absorbent body to the second absorbent body.

[0049] According to the above-described absorbent article, the hydrophobic region makes it less likely for the excreted fluid absorbed by the second absorbent body to return to the first absorbent body, and facilitates the movement of the excreted fluid from the first absorbent body to the second absorbent body.

[0050] In such an absorbent article, it is desirable that the unit area weight of the superabsorbent polymer of the first absorbent core be greater than the unit area weight of the superabsorbent polymer of the second absorbent core.

[0051] According to the above-described absorbent article, the water retention property of the first absorbent core can be improved, and the risk of the excreted fluid absorbed by the first absorbent core returning to the skin side of the wearer can be reduced, as compared to the case where the unit area weight of the superabsorbent polymer of the second absorbent core is higher than the unit area weight of the superabsorbent polymer of the first absorbent core.

[0052] In such an absorbent article, it is desirable that the second absorbent core have superabsorbent polymer and pulp fibers.

[0053] According to the above-described absorbent article, the pulp fibers more easily attract liquid, and thus the excreted fluid absorbed by the first absorbent body is more easily attracted to the second absorbent body, thereby more easily reducing the return of the excreted fluid absorbed by the first absorbent body to the skin side.

[0054] In such an absorbent article, it is desirable that the second absorbent core have pulp fibers and not have superabsorbent polymer.

[0055] According to the above-described absorbent article, the performance of diffusing the excreted fluid in the second absorbent core can be enhanced as compared to the case where superabsorbent polymer is included, and thus the excreted fluid can be more quickly absorbed in a large area of the second absorbent core.

[0056] In such an absorbent article, it is desirable that the second absorbent body have a greater maximum absorption amount of the excreted fluid than the first absorbent body.

[0057] According to the above-described absorbent article, the second absorbent body is provided on the non-skin side with respect to the first absorbent body. Thus, the second absorbent body absorbs a larger amount of the excreted fluid, which makes it possible to further reduce the discomfort of the excreted fluid to the skin of the wearer.

[0058] This Embodiment

[0059] Hereinafter, an absorbent article according to this embodiment will be described taking a light incontinence pad as an example. However, the absorbent article is not limited to a light incontinence pad, and examples of other absorbent articles include sanitary napkins and panty liners.

[0060] Basic configuration of a light incontinence pad 1

[0061] Figure 1 is a plan view of the light incontinence pad 1 (hereinafter also referred to as "pad") when viewed from the skin side in a stretched state. Figure 2 is a plan view of the pad 1 when viewed from the non-skin side in a stretched state. Figure 3 is a schematic cross-sectional view of the pad 1 taken along the line I-I in Figure 1 It should be noted that the stretched state of the pad 1 means that the pad 1 is stretched to a state without wrinkles. Specifically, the stretched state means that the pad 1 is stretched to a state in which the dimensions of the constituent members of the pad 1 match or approximate 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.

[0062] The pad 1 has a longitudinal direction, a width direction, and a thickness direction. In the thickness direction, the side that comes into 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 configuration that is symmetrical in the longitudinal direction. Therefore, one side of the pad 1 in the longitudinal direction can be defined as the front side of the wearer or the back side of the wearer.

[0063] As shown in Figure 3 , the pad 1 includes a multi-layer absorbent body 100, a pair of first side panels 16, a pair of second side panels 25, and a back panel 24.

[0064] The "multi-layer absorbent body" means a structure in which a plurality of absorbent bodies are overlaid on each other in the thickness direction. The multi-layer absorbent body 100 of the pad 1 includes a first absorbent body 10, and a second absorbent body 20 arranged on the non-skin side with respect to the first absorbent body 10 in the thickness direction. In the multi-layer absorbent body 100, a larger amount of excreted fluid can be absorbed because the excreted fluid is first absorbed by the first absorbent body 10 arranged on the skin side, and then the excreted fluid absorbed by the first absorbent body 10 is absorbed by the second absorbent body 20 arranged on the non-skin side with respect to the first absorbent body. Furthermore, since the excreted fluid absorbed by the first absorbent body 10 is transferred to the second absorbent body, the amount of excreted fluid remaining in the first absorbent body 10 can be reduced, and the texture during use of the pad can be improved. The length of the first absorbent body 10 in the width direction of the diaper 1 is substantially equal to or slightly shorter than the length of the second absorbent body 20 in the width direction. It should be noted that the multi-layer absorbent body 100 is not limited to including two absorbent bodies (the first absorbent body 10 and the second absorbent body 20), and can include two or more absorbent bodies.

[0065] The first absorbent body 10 includes: a first absorbent core 11; a first skin-side core wrap 12 covering a skin-side surface of the first absorbent core 11; a first non-skin-side core wrap 13 covering a non-skin-side surface of the first absorbent core 11; a top sheet 14 arranged on the skin side with respect to the first skin-side core wrap 12; and an intermediate sheet 15 arranged between the top sheet 14 and the first skin-side core wrap 12. These members are connected with adhesives Al to A6 (such as hot melt adhesives).

[0066] The top sheet 14 and the intermediate sheet 15 are liquid-permeable sheets. As the liquid-permeable sheets, nonwoven fabric sheets (for example, air-through nonwoven fabric sheets, spun-bond nonwoven fabric sheets, or the like), synthetic resin films having through-holes, or the like can be used.

[0067] The first absorbent core 11 is made of superabsorbent polymers (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 nonwoven fabric sheets or the like can also be used. 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.

[0068] Both end portions in the width direction of the first skin-side core wrap 12 are placed folded back on portions of the non-skin-side surface of the first non-skin-side core wrap 13 so as to enclose 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. A perfume 17 is arranged between the folded-back portions of the first skin-side core wrap 12 and the first non-skin-side core wrap 13. The perfume 17 can mask the odor of the excreted fluid, or alleviate the wearer's uneasiness or melancholy about using the pad 1.

[0069] The first side sheet 16 is arranged in both end portions in the width direction of the first absorbent body 10. The first side sheet 16 is a liquid-impermeable sheet, and in the present embodiment, the first side sheet 16 is a nonwoven fabric sheet including hydrophobic fibers (for example, an air-through nonwoven fabric sheet or a spun-bond nonwoven fabric sheet). One end portion of the first side sheet 16 is fixed with an adhesive A6 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 portions of the first skin-side core wrap 12). The first side sheet 16 is folded back from the fixed portions toward the skin-side surface side of the top sheet 14 so as to enclose 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 with an adhesive A7 to both end portions in the width direction of the skin-side surface of the top sheet 14.

[0070] Furthermore, at the end edges in the width direction of the first side sheet 16, single elastic strings 18 (elastic members) that stretch and contract in the longitudinal direction are arranged. That is, the elastic strings 18 are fixed to the first side sheet 16 in a state of being stretched in the longitudinal direction. Note that, instead of the elastic strings 18 (string-shaped elastic members), sheet-shaped elastic members, such as a stretchable film, can be arranged. Furthermore, the number of elastic strings 18 is not limited to one, and a plurality of elastic strings 18 can be used. Furthermore, in the drawings, only the stretchable / contractible portions (18a to 18b) of the elastic strings 18 that exhibit stretchability are shown. Figure 2

[0071] The second absorbent body 20 includes a second absorbent core 21, a second skin-side core wrap 22 that covers the skin-side surface of the second absorbent core 21, and a second non-skin-side core wrap 23 that covers the non-skin-side surface of the second absorbent core 21. These members are connected with adhesives A8 to Al 1 (such as a hot melt adhesive).

[0072] The second absorbent core 21 is an absorbent core obtained by molding liquid-absorbing fibers (such as pulp fibers or cellulose-based absorbent fibers) into a predetermined shape. The liquid-absorbing fibers can or can not have superabsorbent polymers (SAP) added thereto. The second skin-side core wrap 22 and the second non-skin-side core wrap 23 are liquid-permeable sheets, and can employ tissue paper, a nonwoven fabric sheet, or the like. The two end portions in the width direction of the second skin-side core wrap 22 are folded back to the positions of the two end portions in the width direction on the non-skin-side surface of the second absorbent core 21 so as to enclose the second absorbent core 21. The second non-skin-side core wrap 23 is arranged so as to cover the non-skin-side surface of the second absorbent core 21 from the non-skin-side with respect to the folded-back portions 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 a second core portion 21 to 23.

[0073] The back sheet 24 is arranged on the non-skin-side with respect to the second non-skin-side core wrap 23. The back sheet 24 is a liquid-impermeable sheet. 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.

[0074] ​The second side sheet 25 is a pair of sheet members that extend 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. Like the first side sheet 16, the second side sheet 25 is a liquid impermeable sheet that can take a nonwoven sheet including hydrophobic fibers or the like. 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.

[0075] The first absorbent body 10 and the second absorbent body 20 are connected with the adhesive A12 disposed on the skin side surface of the second side sheet 25 and the adhesive A8 disposed in the thickness direction between the second side sheet 25 and the second core portions 21 to 23. Specifically, the first side sheet 16 and the second side sheet 25 are connected with the adhesive A12. Further, between a pair of second side sheets 25 disposed apart from each other in the width direction, the first core portions 11 to 13 and the second absorbent body 20 are connected with the adhesive A8.

[0076] Further, as shown in Figure 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 curved and protrude outward in the width direction. The length in the width direction of the first core portions 11 to 13 is substantially equal to or slightly longer than the second core portions 21 to 23, and the length in the longitudinal direction of the first core portions is shorter than the second core portions 21 to 23.

[0077] On the non-skin side surface of the back sheet 24, an anti-slip portion 30 (adhesive portion) on which a hot melt adhesive or the like is applied is provided. The anti-slip portion 30 is attached to the skin side surface of the wearer's undergarment, and the pad 1 is used in a state fixed to the undergarment. As shown in Figure 2 the anti-slip portion 30 includes a pair of central adhesive portions 31 disposed apart from each other in the width direction, and four side adhesive portions 32 disposed outside the central adhesive portions 31 in the width direction, respectively.

[0078] The central adhesive portions 31 each have a rectangular shape with a long side in the longitudinal direction, and are arranged so as to continuously extend in the longitudinal direction from one longitudinal end portion to the other longitudinal end portion of the pad 1. The side adhesive portions 32 each have a rectangular shape with a long side in the longitudinal direction, and have a shorter longitudinal length than the central adhesive portions 31. Two of the four side adhesive portions 32 are arranged at one longitudinal end portion of the pad 1, and the remaining two side adhesive portions 32 are arranged at the other longitudinal end portion of the pad 1. In other words, a pair of side adhesive portions 32 are disposed apart from each other in the longitudinal direction outside the central adhesive portions 31 in the width direction.

[0079] The pad 1 has a compressed portion 40 in which the pad 1 is recessed in the thickness direction. In the compressed portion 40 of the present embodiment, the member from the top sheet 14 of the first absorbent body 10 to the second core portions 21 to 23 is compressed in the thickness direction from the skin side.

[0080] In the compressed portion 40, the thickness of the pad 1 is smaller than that of the surrounding portions, and the fiber density is higher than that of the surrounding portions. These comparisons are suggested to be made using well-known methods. For example, the thickness of each portion of the pad 1 can be compared visually, or by comparing the values measured by pressing the target portions with a dial thickness gauge ID-C1012C manufactured by Mitutoyo Corporation or its equivalent product at a pressure of 3.0 gf / cm 2 The density of each portion of the pad 1 can be compared based on the enlarged images of the thickness-direction cross sections of the pad 1 obtained using an electron microscope or the like.

[0081] The compressed portion 40 includes a pair of first compressed portions 41 extending in the longitudinal direction and arranged apart 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 apart from each other in the longitudinal direction. The first compressed portions 41 each have a curved shape so as to bulge inwardly in the width direction in the longitudinal central portion of the pad 1, i.e., in the region contacting the crotch portion of the wearer. The second compressed portions 42 each have a curved shape so as to bulge outwardly in the longitudinal direction. However, Figure 1 The shape, number, and arrangement position of the compressed portions 40 shown in FIG. 8 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 can be a groove-shaped compressed portion in which the pad 1 is recessed continuously in that direction, or a compressed portion in which a plurality of dot-shaped compressed portions are arranged side by side in a row.

[0082] So far, the basic configuration of the pad 1 has been described, but the configuration of the pad 1 described above is one example, and is not limited thereto. For example, the planar shape of the pad 1 can be an asymmetric shape in the longitudinal direction, or the pad 1 does not necessarily have to include the intermediate sheet 15 or the perfume 17. Further, each of the first absorbent core 11 and the second absorbent core 21 can be surrounded by a single core wrap.

[0083] Hydrophobic region H and non-hydrophobic region N of the pad 1

[0084] The multi-layer absorbent body 100 of the pad 1 has a hydrophobic portion that is hydrophobic, which is located in the boundary portion between the first absorbent body 10 and the second absorbent body 20 in the thickness direction. Specifically, as Figure 3 and Figure 4As shown, the multilayer absorber 100 includes a hydrophobic second side sheet 25, which is located between the first absorber 10 and the second absorber 20 in the thickness direction. Figure 4 yes Figure 3 A magnified view of the middle Z-section.

[0085] In pad 1, the "boundary portion" between the first absorbent 10 and the second absorbent 20 refers to the 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 both the non-skin side surface of the first absorbent 10 and the skin side surface of the second absorbent 20.

[0086] Furthermore, each of the first absorber 10 and the second absorber 20 is not limited to the above-described configuration. For example, an acceptable configuration is that the first absorber 10 (second absorber 20) is formed solely of the first absorbent core 11 (second absorbent core 21) without including the aforementioned core wrappers 11 (22 and 23), or that the first absorber 10 (second absorber 20) includes a portion of a constituent component such as the aforementioned core wrappers 11 (22 and 23), or a component other than the aforementioned constituent components.

[0087] "Hydrophobicity" refers to the property that a liquid does not easily spread when it falls onto a surface. Preferably, it refers to a portion where the fallen liquid has a contact angle greater than 90°. That is, the hydrophobic region H is the region that reduces liquid movement, and the non-hydrophobic region N is the region that does not impede liquid movement. "Hydrophobic portion" refers to a portion that includes a hydrophobic component. The hydrophobic portion can be made of a hydrophobic sheet component such as the second side piece 25, or it can be a portion to which a hydrophobic agent is applied.

[0088] The second side sheet 25 is a hydrophobic nonwoven fabric. Furthermore, any material used in the art can be used without particular limitation as the hydrophobic fiber included in the hydrophobic nonwoven fabric sheet, such as olefin-based fibers like polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), or combinations thereof.

[0089] like Figure 1 , 3 As shown in Figure 4, when the pad 1 is viewed along its thickness direction, the multilayer absorber 100 includes: a hydrophobic region H including a hydrophobic portion (second side sheet 25); and a non-hydrophobic region N excluding the hydrophobic portion. This allows excreted fluid to move from the first absorber 10 to the second absorber 20 in the non-hydrophobic region N, such as... Figure 4 As indicated by arrow S1, this design also ensures that once the discharged fluid is absorbed by the second absorber 20 in the hydrophobic region H, it is less likely to return to the first absorber 10, as shown in the image.Figure 4 This makes it possible to reduce the risk of the wearer's discomfort caused by the excretion fluid in the first absorbent body 10 coming into contact with the wearer's skin.

[0090] Specifically, in the non-hydrophobic region N, the excretion fluid can move from the first absorbent body 10 to the second absorbent body. Thus, the excretion fluid that has been absorbed by the first absorbent body 10 (the first absorbent core 11) is first moved from the first absorbent body 10 to the second absorbent body 20 in the non-hydrophobic region N, and is absorbed by the second absorbent body 20 (arrow S1 in Figure 4 In the hydrophobic region H, the hydrophobic second side sheet 25 makes it difficult for the excretion fluid that has been absorbed by the second absorbent body 20 to return to the first absorbent body 10 (arrow S2 in Figure 4 Thus, the excretion fluid absorbed by the second absorbent body 20 is not likely to return to the first absorbent body 10, and it is possible to reduce the risk of the wearer's discomfort caused by the excretion fluid in the first absorbent body 10 coming into contact with the wearer's skin.

[0091] Further, as shown in Figs. Figure 1 , 3 and 4, it is preferable that, when the pad 1 is viewed in the thickness direction, in the overlapping region X in which the first absorbent body 10 and the second absorbent body 20 overlap each other, the overlapping region X has a portion Hx that overlaps the hydrophobic region H, and the overlapping region X has a portion Nx that overlaps the non-hydrophobic region N. The overlapping region X having the portion Hx that overlaps the hydrophobic region H allows the excretion fluid absorbed by the first absorbent body 10 to move toward the second absorbent body 20 (in the direction of arrow S1 in Figure 4 Further, the overlapping region X having the portion Nx that overlaps the non-hydrophobic region N makes it possible for the hydrophobic second side sheet 25 to reduce the return of the excretion fluid that has been absorbed by the second absorbent body 20 to the first absorbent body 10 (in the direction of arrow S2 in Figure 4 This makes it possible to reduce the movement of the excretion fluid from the second absorbent body 20 to the first absorbent body 10, making it possible to reduce the risk of the wearer's discomfort caused by the excretion fluid returning to the first absorbent body 10.

[0092] The pad 1 includes the first absorbent body 10 and the second absorbent body 20, but the two end portions in the width direction of the first absorbent body 10 are not joined to the second absorbent body 20. That is, the pad 1 has a connection portion 50 that is a central portion in the width direction and in which the first absorbent body 10 and the second absorbent body 20 are connected to each other, and a pair of separation portions 60 that are the two end portions in the width direction and in which the first absorbent body 10 and the second absorbent body 20 are spaced apart from each other. Figure 5 is an explanatory view showing the anti-skid portion 30, the connection portion 50, and the separation portions 60. Figure 6is a schematic cross-sectional view showing an end portion in the width direction of the pad 1. In Figure 5 In the middle, the connecting portion 50 and the anti-skid 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.

[0093] Specifically, as shown in Figure 3 the first absorbent body 10 and the second absorbent body 20 are connected with the adhesive A12 arranged between the first side sheet 16 and the second side sheet 25 and the adhesive A8 arranged between the first core portions 11 to 13 and the second core portions 21 to 23. Thus, as shown in Figure 5 the area 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 being arranged in the entire area, and the adhesive can be intermittently arranged in accordance with the application pattern of the adhesive.

[0094] In the pad 1 having the connecting portion 50 and the separation portion 60, as shown in Figure 6 a pair of the separation 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 Figure 4 the portion of the first absorbent body 10 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.

[0095] By making the cross-sectional shape of the pad 1 dish-shaped, even if a relatively large amount of excreted fluid is excreted in the first absorbent body 10, the rising separation portion 60 of the first absorbent body 10 can block the excreted fluid, and the lateral leakage of the excreted fluid can be suppressed. Further, the inclined surface of the rising separation portion 60 causes the excreted fluid to concentrate to the central portion in the width direction of the first absorbent body 10, so that the excreted fluid is more easily absorbed and retained in the pad 1. Thus, the leakage of the excreted fluid from the pad 1 can be suppressed.

[0096] In the pad 1, the first absorbent body 10 and the second absorbent body 20 are spaced apart from each other in the separation portions 60 at both end portions in the width direction, so that the first absorbent body 10 is more easily distanced from the second absorbent body 20 than in the case where the first absorbent body 10 and the second absorbent body 20 are in contact with each other, so that the excreted fluid absorbed by the second absorbent body 20 is less likely to return to the first absorbent body 10.

[0097] It is preferable that a pair of elastic strings 18 that stretch and contract in the longitudinal direction be arranged in the two end portions in the width direction of the first absorbent body 10 (in the pair of separation portions 60), and that the elastic strings 18 each have a portion that overlaps the separation portion 60 when the pad 1 is viewed in the thickness direction. The contraction of the elastic strings 18 enhances the rising ability of the separation portion 60 of the first absorbent body 10, and as shown in Figure 6 the cross-sectional shape of the pad 1 is dished. That is, the elastic strings 18 make it easier for the first absorbent body 10 and the second absorbent body 20 to be spaced apart from each other in the separation portion 60, which makes it less likely for the excreted fluid absorbed by the second absorbent body 20 to return to the first absorbent body 10. The elastic strings 18 can be arranged in the entire longitudinal region of the separation portion 60, and provided to be elongated in the longitudinal direction. Or the elastic strings 18 can be arranged in a portion of the separation portion 60 in the longitudinal direction, as in the present embodiment.

[0098] Further, in the width direction, a portion in which the first absorbent core 11 is not arranged is provided outside the first absorbent body 10. That is, as shown in Figure 4 the pad 1, the outer end portion in the width direction of the first side sheet 16 extends outward beyond the end edge of the first core portion 11 to 13 in the width direction. At this time, it is preferable that each elastic string 18 be interposed between the skin-side nonwoven fabric (16a) and the non-skin-side nonwoven fabric (16b) in the thickness direction. In the first side sheet 16 that has been folded once in the width direction, the portion on the skin side is defined as the skin-side nonwoven fabric 16a, and the portion on the non-skin side is defined as the non-skin-side nonwoven fabric 16b. The skin-side nonwoven fabric 16a and the non-skin-side nonwoven fabric 16b are connected with adhesives A6 and A7, while the elastic string 18 is interposed between the nonwoven fabrics 16a and 16b. Thus, compared to the case in which the first absorbent core 11 is arranged to extend to the end portion in the width direction of the separation portion 60, the rising ability of the separation portion 60 is enhanced, and a concave shape in which the central portion in the width direction is concave is formed, so that leakage of excreted fluid can be suppressed.

[0099] It should be noted that the first side sheet 16, which is a hydrophobic nonwoven fabric sheet, is arranged in most of the skin-side surface of the separation portion 60. The first side sheet 16 is made of a nonwoven fabric that includes a hydrophobic fiber. As the hydrophobic fiber, any material used in the technical field can 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, per se or combinations thereof. The skin-side nonwoven fabric 16a located farthest on the skin-side surface of the separation portion 60 has a hydrophobic portion, which makes it possible to suppress leakage of excrement outward in the width direction of the pad 1.

[0100] By providing multiple hydrophobic portions in the boundary portion between the first absorber 10 and the second absorber 20, the hydrophobicity can be further improved, and the return of excreted fluid absorbed by the second absorber 20 to the first absorber 10 can be prevented. In the pad 1, in addition to the second side sheet 25 (which is a hydrophobic nonwoven fabric sheet) being a hydrophobic portion, the non-skin-side nonwoven fabric 16b of the first side sheet 16 (which is a hydrophobic nonwoven fabric sheet) is provided in the boundary portion between the first absorber 10 and the second absorber 20. That is, two hydrophobic portions, namely the second side sheet 25 and the non-skin-side nonwoven fabric 16b, are provided in the hydrophobic region N, thus enhancing the hydrophobicity of the hydrophobic region N.

[0101] In addition, such as Figure 4 , 5 As shown, preferably, when the pad 1 is observed along its thickness direction, the non-hydrophobic region N has a portion that does not overlap with the separating portion 60. More preferably, when the pad 1 is observed along its thickness direction, the non-hydrophobic region N may only be provided in the portion where the non-hydrophobic region N overlaps with the connecting portion 50. This makes it easier for the drained fluid to move from the first absorber 10 to the second absorber 20.

[0102] Preferably, when the pad 1 is viewed along its thickness direction, the hydrophobic region H has a portion that overlaps with the separation portion 60. More preferably, when the pad 1 is viewed along its thickness direction, the entire area of ​​each separation portion 60 overlaps with the hydrophobic region H. For example, even when the wearer applies body pressure in the thickness direction of the pad 1, and the separation between the first absorber 10 and the second absorber 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 excretory fluid absorbed by the second absorber 20 returning to the first absorber 10.

[0103] Preferably, when the pad 1 is viewed along its thickness direction, each anti-slip portion 30 has a portion overlapping with the separating portion 60. In this embodiment, a portion of the central side of the side adhesive portion 32 in the longitudinal direction ( Figure 5 The portion 321 shown overlaps with the separating portion 60. In this case, even if the separating portion 60 deforms, the second absorbent 20 becomes easier to return to its original position (near the edge of the underwear) due to the restoring force of the underwear, and the separation between the first absorbent 10 and the second absorbent 20 is more easily maintained. This makes it less likely for excretory fluid that has been absorbed by the second absorbent 20 to return to the first absorbent 10 compared to the case where the first absorbent 10 and the second absorbent 20 are in contact with each other.

[0104] Preferably, the first absorbent body 10 has a recessed portion (compression portion 40) recessed from the skin side to the non-skin side, and the first absorbent body 10 does not have a recessed portion in the hydrophobic region H when the pad 1 is viewed in the thickness direction. The "recessed portion" is a portion recessed in the thickness direction, examples of which include a recessed portion formed by recessing in advance, or a recessed portion formed by cutting, or a recessed portion formed by compression, and the like. The recessed portion provided in the first absorbent body 10 is advantageous for moving the exudate from the skin side to the non-skin side of the first absorbent body 10, and in relation thereto, also advantageous for moving the exudate between the first absorbent body 10 and the second absorbent body 20. On the other hand, in the case where a recessed portion is provided in the hydrophobic region H, in the hydrophobic region H, a greater amount of exudate is moved into the second absorbent body 20, and when a force is applied in the thickness direction due to the body pressure of the wearer or the like, there is a risk that the exudate more easily returns to the first absorbent body 10. In this regard, not providing a recessed portion in the hydrophobic region H makes the exudate absorbed by the second absorbent body 20 less likely to return to the first absorbent body 10.

[0105] On the other hand, more preferably, the recessed portion located in the non-hydrophobic region N is provided from the first absorbent body 10 to the second absorbent body 20 in the thickness direction. The recessed portion provided from the first absorbent body 10 to the second absorbent body 20 makes it easier to draw the exudate to the second absorbent body 20, which makes it easier and faster for the exudate to transfer from the first absorbent body 10 to the second absorbent body 20.

[0106] Preferably, the compression portion 40 compressed in the thickness direction is provided as the recessed portion, and preferably, the compression portion 40 is provided in the non-hydrophobic region N when the pad 1 is viewed in the thickness direction, as shown in Figure 1 In the compression portion 40, the fiber density of the pad 1 is higher than the surrounding. Therefore, by providing the compression portion 40 in the pad 1, not only is the pad recessed in the thickness direction, but also the capillary phenomenon makes it easier for the exudate to be drawn, and accordingly, the exudate is rapidly transferred from the first absorbent body 10 to the second absorbent body 20. Therefore, it is possible to prevent the exudate from overflowing and leaking from the pad 1 due to the first absorbent body 10 not being able to completely absorb the exudate. Furthermore, the compression portion 40 makes the shape of the pad 1 less likely to collapse, and the absorbent body is also less likely to be distorted. In the compression portion 40 of the present embodiment, the member from the top sheet 14 to the second core portions 21 to 23 is compressed from the skin side to the non-skin side.

[0107] However, the configuration is not limited thereto, and the compression portion 40 can be a portion that individually compresses the first absorbent body 10 and the second absorbent body 20. Further, the pad 1 can include: a compression portion that individually compresses the first absorbent body 10 and the second absorbent body 20; and a compression portion that extends from the first absorbent body 10 to the second absorbent body 20.

[0108] Preferably, the weight per unit area (g / m 2 ) of the superabsorbent polymer (SAP) of the first absorbent core 11 is greater than the weight per unit area of the superabsorbent polymer of the second absorbent core 21. Generally, the superabsorbent polymer (SAP) has a higher water retention property for the excreted fluid or the like. Therefore, the water retention property of the first absorbent core 11 can be enhanced compared to a case where the weight per unit area of the SAP of the second absorbent core is higher than that of the first absorbent core 11. Thus, 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. The weight per unit area (g / m 2 ) of the SAP is obtained by cutting a predetermined area from the first absorbent core 11 and the second absorbent core 21 as samples, taking out the SAP from each sample, and dividing the weight of the taken-out SAP by the area of each sample.

[0109] More preferably, the first absorbent core 11 has the superabsorbent polymer (SAP) and has no pulp fiber or has no pulp fiber with a small weight per unit area. The first absorbent core 11 of the pad 1 is formed only of the SAP. By reducing the weight per unit area of the pulp fiber in the first absorbent core 11 or setting the weight per unit area of the pulp fiber in the first absorbent core 11 to zero, the thickness of the first absorbent core 11 becomes small while the water retention property of the first absorbent core 11 is enhanced, making the first absorbent body 10 less likely to be distorted.

[0110] Further, like the pad 1, the second absorbent core 21 preferably has the superabsorbent polymer (SAP) and the pulp fiber. The pulp fiber has a property of easily taking up liquid. Therefore, the excreted fluid absorbed by the first absorbent body 10 is more easily attracted by the pulp fiber of the second absorbent body 20 and absorbed into the second absorbent body 20, which makes it possible to suppress the excreted fluid from overflowing and leaking from the pad 1. Then, the excreted fluid absorbed into the pulp fiber is more easily retained by the superabsorbent polymer (SAP) contained in the second absorbent body 20, which makes it possible to reduce the return of the excreted fluid absorbed by the second absorbent body 20 to the first absorbent body 10. The second absorbent body 20 has the SAP and the pulp fiber, which can be confirmed by a generally known method, such as a method of visually confirming the surface or the cross section of the second absorbent core 21 or a method of confirming the surface or the cross section on an image projected with an optical microscope.

[0111] It should be noted that it is acceptable for the second absorbent core 21 to have a configuration of pulp fibers and not have superabsorbent polymers (SAP). Pulp fibers more easily take in liquid, and have better liquid spreading properties than superabsorbent polymers (SAP). Therefore, in the second absorbent core 21 having pulp fibers and not having superabsorbent polymers (SAP), the spreading of the excreted fluid is not hindered by the SAP compared to the case of having superabsorbent polymers (SAP). Therefore, the excreted fluid is widely spread in the planar direction of the second absorbent core 21. As a result, the excreted fluid is more easily and quickly absorbed over a wider range of the second absorbent core 21, and the absorbency of the second absorbent core 21 is effectively utilized.

[0112] Further, preferably, the maximum absorbency of the second absorbent body 20 for the excreted fluid is greater than that of the first absorbent body 10. In this case, the excreted fluid transferred from the first absorbent body 10 to the second absorbent body 20 can be absorbed and retained by the second absorbent body 20, which makes it possible to suppress the return (rewetting) of the excreted fluid to the first absorbent body 10. Therefore, it is possible to reduce the risk of the excreted fluid overflowing and leaking from the pad 1 due to the first absorbent body 10 being unable to completely absorb the excreted fluid. Further, the second absorbent body 20 disposed on the non-skin side with respect to the first absorbent body 10 can absorb a larger amount of the excreted fluid, and thus the amount of the excreted fluid absorbed by the first absorbent body 10, which is closer to the wearer's skin, is reduced. Therefore, the discomfort to the wearer's skin caused by the excreted fluid is further reduced, and the comfort of the pad 1 is improved.

[0113] The maximum absorption amount of the first absorbent 10 and the second absorbent 20 for the excreted fluid can be determined according to, for example, the following method: Test Method for Water Absorption Capacity of Superabsorbent Resin of JIS K7223 (1996). In brief, a sample (e.g., 0.20 g or 1.00 g) is cut out from the first and second absorbent cores 11 and 21, respectively, in the first and second absorbents 10 and 20 to be measured. The mass of each sample is defined as a (g). Then, the sample is put in a tea bag made of a 250-mesh nylon net. The tea bag is 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., for 10 minutes). The mass of the tea bag after the draining is defined as b (g). Further, similarly, the mass c (g) of the empty tea bag after the immersion in the test liquid and the draining is measured. It is recommended that the above operation be performed 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 is calculated according to the formula "W = (b - c - a) / a". The 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 that the calculated value be compared as the maximum absorption amount (saturation absorption amount) of the first absorbent 10 and the second absorbent 20. It should be noted that, if the areal weight and the like differ depending on the planar position in the absorbent core, it is recommended, for example, that the entire absorbent core be taken as the sample.

[0114] Other Embodiments

[0115] In the above-described embodiments, 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. However, the present application is not limited thereto. For example, as shown in FIG. 17, the pad 1S can have a structure in which the length in the width direction of the first absorbent core 11 (the first absorbent 10) is significantly shorter than the length in the width direction of the second absorbent core 21 (the second absorbent 20). Figure 7 Figure 7 is a plan view of a pad 1S according to another embodiment as viewed from the skin side. Figure 8 is a schematic cross-sectional view of the 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.

[0116] Like the above-described embodiments, the pad 1S includes a multilayer absorbent 100, a pair of first side sheets 16, a pair of second side sheets 25, and a back sheet 24. The multilayer absorbent 100 includes a first absorbent 10S and a second absorbent 20S disposed on the non-skin side in the thickness direction with respect to the first absorbent 10S. ​

[0117] As Figure 7 and Figure 8 shown, the length in the width direction of the first absorbent body 10S is shorter than the length in the width direction of the second absorbent body 20S. Similarly, the length of the member arranged on the skin side with respect to the second side sheet 25 (such as the top sheet 14) is shorter than the length in the width direction of the corresponding member of the above-described diaper 1, respectively.

[0118] The pad 1S has a hydrophobic portion that is hydrophobic, which is located in the boundary portion between the first absorbent body 10S and the second absorbent body 20 in the thickness direction. Specifically, as Figure 8 shown, the multi-layer absorbent body 100 includes the second side sheet 25, which is hydrophobic, located between the first absorbent body 10S and the second absorbent body 20S in the thickness direction. As Figure 7 shown, when the pad 1S is viewed in the thickness direction, the multi-layer 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 a 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 causing discomfort to the wearer can be reduced. On the other hand, in the hydrophobic region H of each non-overlap region Y, the side end portion of the second absorbent body 20S does not overlap with the first absorbent body 10S when the pad 1S is viewed in the thickness direction. Also, in the hydrophobic region H of the non-overlap 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.

[0119] Further, as Figure 7 shown, when the pad 1S is viewed in the thickness direction, the region where the first absorbent body 10S and the second absorbent body 20S overlap with each other is defined as the overlap region X, and the region where the first absorbent body 10S and the second absorbent body 20S do not overlap with each other is defined as the non-overlap region Y. At this time, preferably, the hydrophobic region H is provided in the non-overlap region Y, and the non-hydrophobic region N is provided in the overlap 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 body 10S can move to the second absorbent body 20. On the other hand, in the hydrophobic region H located in the non-overlap region Y, the hydrophobic portion (the 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 thus the risk of the return of the excreted fluid from the second absorbent body 20S to the first absorbent body 10S causing discomfort to the wearer can be reduced.

[0120] In Figure 7 and Figure 8In the illustrated pad 1S, the hydrophobic region H and the non-hydrophobic region N are provided in the overlapping region X, and only the hydrophobic region H is provided in the non-overlapping region Y. However, the configuration is not limited to this. A configuration in which 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 is also acceptable.

[0121] It should be noted that, as another embodiment, a configuration in which the length in the width direction of the first absorbent body 10 is significantly shorter than the length in the width direction of the second absorbent body 20 is described. However, the configuration is not limited to this, and the length in the width direction of the first absorbent body 10 can be significantly longer than the length in the width direction of the second absorbent body 20. In the case where the length in the width direction of the first absorbent body 10 is longer than the length in the width direction of the second absorbent body 20, the first absorbent body 10 has a portion overlapping with 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 the portion overlapping with the non-overlapping region Y in the thickness direction due to a change in the sitting posture of the wearer or the like, the hydrophobic region H located in the non-overlapping region Y can reduce the risk of the excreted fluid absorbed by the first absorbent body 10 leaking from the non-skin side surface of the first absorbent body 10 toward the non-skin side on the non-skin side surface of the first absorbent body overlapping with the non-overlapping region Y.

[0122] Other Embodiments

[0123] Although the above-described embodiments of the present application have been described, the purpose of the above-described embodiments is to facilitate understanding of the present application, and is not intended to limit the interpretation of the present application. Furthermore, the present application can be modified or improved without departing from the spirit thereof, and, needless to say, equivalents thereof are also included in the present application.

[0124] In the above-described embodiments, the hydrophobicity of the hydrophobic region H is enhanced by making the second side sheet 25 a hydrophobic portion, and by using the non-skin side nonwoven fabric 16b of the first side sheet 16, which is a hydrophobic nonwoven fabric sheet. However, the present application is not limited to this. 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 necessary, and the non-skin side nonwoven fabric 16b can be a hydrophilic sheet member. Alternatively, a configuration 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 is also acceptable. In this case, since the use of the second side sheet 25 is not necessary, the material of the pad 1 can be reduced to lower the manufacturing cost.

[0125] Further, in the above-described embodiment, when the pad 1 is viewed in the thickness direction, both end portions in the width direction of the second absorbent body 20 overlap the second side sheet 25, and have a pair of the hydrophobic regions H. However, the configuration is not limited to this. The hydrophobic regions H can be provided in any number and at any position. For example, when the pad 1 is viewed in the thickness direction, the hydrophobic regions H can be provided in regions overlapping either the longitudinal one-side end portion or the longitudinal other-side end portion of the second absorbent body 20. Further, when the pad 1 is viewed in the thickness direction, the hydrophobic regions H can be provided only in regions overlapping the region (non-overlapping region Y) in which the first absorbent body 10 and the second absorbent body 20 do not overlap each other.

[0126] LIST OF REFERENCE NUMERALS

[0127] 1: Pad (light incontinence pad, absorbent article), 10: First absorbent body, 11: First absorbent core, 12: First skin-side core wrap, 13: First non-skin-side core wrap, 14: Top sheet, 15: Middle sheet, 16: First side sheet (hydrophobic portion), 16a: Skin-side nonwoven fabric, 16b: Non-skin-side nonwoven fabric, 18: Elastic string (elastic member), 20: Second absorbent body, 21: Second absorbent core, 22: Second skin-side core wrap, 23: Second non-skin-side core wrap, 24: Back sheet, 25: Second side sheet (hydrophobic portion), 30: Anti-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 portion, 100: Multilayer absorbent body, H: Hydrophobic region, N: Non-hydrophobic region, X: Overlapping region, Y: Non-overlapping region.

Claims

1. An absorbent article having a longitudinal direction, a width direction, and a thickness direction, the absorbent article comprising: a multilayer absorbent body including: a first absorbent body having a first absorbent core, and a second absorbent body having a second absorbent core and disposed on a non-skin side in the 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 the hydrophobic portion, an adhesive portion provided on a surface of the non-skin side of the second absorbent body, the absorbent article having a connection portion and a pair of separation portions at least at a predetermined position in the longitudinal direction, the connection portion being a portion in which the first absorbent body and the second absorbent body are connected, provided in a central portion in the width direction, the pair of separation portions being portions in which the first absorbent body and the second absorbent body are spaced apart from each other, provided in two end portions in the width direction.

2. The absorbent article according to claim 1, wherein the non-hydrophobic region has a portion that does not overlap with the separation portion when viewed in the thickness direction.

3. The absorbent article according to claim 1 or 2, wherein the adhesive portion has a portion that overlaps with the separation portion when viewed in the thickness direction.

4. The absorbent article according to claim 1 or 2, wherein the hydrophobic region has a portion that overlaps with the separation portion when viewed in the thickness direction.

5. The absorbent article according to claim 1 or 2, wherein a pair of elastic members that stretch and contract in the longitudinal direction are disposed in two end portions in the width direction of the first absorbent body, and each of the elastic members has a portion that overlaps with the separation portion when viewed in the thickness direction.

6. The absorbent article according to claim 5, wherein a portion in which the first absorbent core is not disposed is provided in the two end portions in the width direction of the first absorbent body, and in the portion in which the first absorbent core is not disposed, the elastic member is interposed between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric in the thickness direction.

7. The absorbent article according to claim 6, wherein the hydrophobic portion is the non-skin-side nonwoven fabric.

8. The absorbent article according to claim 1 or 2, wherein a plurality of hydrophobic portions are provided side by side with respect to the thickness direction in the hydrophobic region.

9. The absorbent article according to claim 1 or 2, wherein the unit area weight of the superabsorbent polymer of the first absorbent core is greater than the unit area weight of the superabsorbent polymer of the second absorbent core.

10. The absorbent article according to claim 1 or 2, wherein the second absorbent core has a superabsorbent polymer and a pulp fiber.

11. The absorbent article according to claim 1 or 2, wherein the second absorbent core has a pulp fiber and does not have a superabsorbent polymer.

12. The absorbent article according to claim 1 or 2, wherein The second absorbent has a greater maximum absorption of the excreted fluid than the first absorbent.

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