Absorbent article

Abstract

To provide an absorbent article which is thin but excels in absorption performance and walking ease.SOLUTION: An absorbent article 10 comprises: a top sheet 11; a back sheet 12; an absorber 13 having an upper layer absorber 17 and a lower layer absorber 18; a first intermediate sheet 14 wrapping the upper layer absorber 17 and the lower layer absorber 18; and a second intermediate sheet 15 arranged between the upper layer absorber 17 and the lower layer absorber 18. The upper layer absorber 17 is composed of pulp fibers of 50 wt.% or more and 100 wt.% or less, 50 g / m2 or more and 130 g / m2 or less and SAP of 0 wt.% or more and 50 wt.% or less, and has a slit 19 extending along a longer direction. The lower layer absorber 18 has Y-shaped absorbing parts 18a where no pulp fibers are included and the SAP is arranged in a Y-shape, on both sides in the longer direction, and a SAP non-arrangement area 22 is provided between the first areas 20 in the Y-shaped absorbing part 18a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to absorbent articles. [Background technology]

[0002] In general, absorbent articles such as light incontinence pads, pants-type paper diapers, and tape-fastened paper diapers are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between the two sheets. As a result, body fluids such as urine are absorbed into the absorbent body through the top sheet, and the back sheet prevents the body fluids from leaking to the outside. Various ideas have been implemented in such absorbent articles to improve the absorbency of body fluids, improve the wearing comfort of the wearer, prevent leakage, etc.

[0003] For example, the absorbent article disclosed in Patent Document 1 is described as having a configuration in which a plurality of regions in which a water-absorbent resin powder is present are formed in an absorbent sheet, and between adjacent regions in which a water-absorbent resin powder is present and at both ends in the width direction of the absorbent sheet, there are regions in which no water-absorbent resin powder is present. Therefore, the absorbent article is thin and is unlikely to suffer from inhibition of swelling of the water-absorbent resin powder, and has excellent body fluid absorption performance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-061230 A Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, absorbent articles using thin absorbents are required from the viewpoints of wearing comfort, ease of movement, effect on outerwear, storability, transportability, etc. The absorbent body is composed of pulp fibers and superabsorbent polymers (hereinafter sometimes referred to as "SAP"), and by reducing the proportion of pulp fibers, the thickness of the absorbent body can be reduced, but on the other hand, there is a problem that increasing the proportion of SAP reduces the water absorption speed and also reduces the feel against the skin. In addition, the thickness of the absorbent body can be reduced by reducing the total weight of the absorbent body, but reducing the total weight reduces the maximum absorption capacity of the absorbent article, and there is a problem that liquid return is more likely to occur when a load is applied.

[0006] The absorbent article described in Patent Document 1 has a slow absorption rate, and once it has absorbed body fluids, its absorption performance is likely to decrease with repeated use, and it also feels bad against the skin and is not easy to walk in after absorption.

[0007] Therefore, an object of the present disclosure is to provide an absorbent article that is thin yet has excellent absorption performance and is easy to walk in. [Means for solving the problem]

[0008] In order to solve the above problems, an absorbent article according to a first aspect of the present invention has a liquid-permeable top sheet on the skin side, a liquid-impermeable back sheet on the non-skin side, an upper absorbent body on the skin side, and a lower absorbent body on the non-skin side, and is provided with an absorbent body disposed between the top sheet and the back sheet, a liquid-permeable first intermediate sheet located between the top sheet and the back sheet and enveloping the upper absorbent body and the lower absorbent body, and a liquid-permeable second intermediate sheet disposed between the upper absorbent body and the lower absorbent body, and the upper absorbent body has a density of 50 g / m2 or more at 50% by weight or more and 100% by weight or less. 2 More than 130g / m 2The lower absorbent body is composed of the following pulp fibers and 0% or more and 50% or less by weight of superabsorbent polymer, and has a slit extending along the longitudinal direction in the widthwise center, and the lower absorbent body has Y-shaped absorbent sections on both longitudinal sides which do not contain pulp fibers and have superabsorbent polymer arranged in a Y shape, and the Y-shaped absorbent sections on both longitudinal sides each have a first region extending longitudinally in the widthwise center, and a pair of second regions which become spaced apart in the width direction from the longitudinal outer ends of the first regions toward the longitudinal outside, and the first regions of the Y-shaped absorbent sections on both longitudinal sides are spaced apart from each other in the longitudinal direction, and a region where no superabsorbent polymer is arranged is provided between the first regions.

[0009] A second aspect of the present invention is an absorbent article according to the first aspect, wherein the longitudinal length of the slit in the upper absorbent body is between 50% and 100% of the total length of the maximum parts of the upper absorbent body and the lower absorbent body, and the widthwise length of the slit in the upper absorbent body is between 5% and 20% of the total length of the minimum parts of the upper absorbent body and the lower absorbent body.

[0010] A third aspect of the present invention is an absorbent article according to the first or second aspect, wherein the first region of the Y-shaped absorbent section of the lower absorbent body is located on the non-skin side of the slit of the upper absorbent body. Effect of the Invention

[0011] According to the present disclosure, it is possible to provide an absorbent article that is thin yet has excellent absorption performance and is easy to walk in. [Brief description of the drawings]

[0012] [Figure 1] 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the skin side. [Diagram 2] FIG. 2 is a cross-sectional view taken along the line II-II of FIG. [Diagram 3] FIG. 2 is a plan view of the upper absorbent body from the skin side. [Figure 4] FIG. 2 is a plan view of the lower absorbent body from the skin side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an absorbent article according to one embodiment of the present invention will be described with reference to the drawings.

[0014] In this specification, wearing an absorbent article means a state in which the absorbent article is worn on the body, regardless of whether the absorbent article is worn before, during, or after the absorption of bodily fluids. In addition, the "front side" means a direction that is the ventral side of the wearer when the absorbent article is worn, and the "rear side" means a direction that is the dorsal side of the wearer. In addition, the left-right direction means a left-right direction as seen from a wearer facing forward. In addition, the longitudinal direction of each component of the absorbent article means the longitudinal direction of the absorbent article, which is a direction along the front and back of the wearer when worn, and is a direction along the arrow X in the figure. In addition, the inner side in the longitudinal direction means a direction toward the center in the longitudinal direction, and the outer side in the longitudinal direction means a direction away from the center in the longitudinal direction. In addition, the width direction of each component of the absorbent article means a direction that intersects (is perpendicular to) the longitudinal direction, which is a direction along the left and right of the wearer when worn, and is a direction along the arrow Y in the figure. The inside of the width direction is the direction toward the center of the width direction, and the outside of the width direction is the direction away from the center of the width direction. The thickness direction of each component of the absorbent article refers to the direction in which each component is stacked, and is the direction that intersects (is perpendicular to) both the longitudinal direction and the width direction, and is the direction along the arrow Z in the figure. The "skin side" refers to the direction toward the wearer's body when the absorbent article is worn in the thickness direction, and the "non-skin side" refers to the direction opposite to the skin side in the thickness direction. Body fluids refer to liquids discharged from the body to the outside, such as urine, blood, and water in loose stools.

[0015] (Absorbent articles) Fig. 1 is a plan view of an absorbent article according to one embodiment of the present invention, as viewed from the skin side. Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 1. Fig. 3 is a plan view of an upper absorbent body, as viewed from the skin side. Fig. 4 is a plan view of a lower absorbent body, as viewed from the skin side. Fig. 2 shows a schematic cross section of the absorbent article.

[0016] The absorbent article 10 according to the present embodiment can be used as various absorbent articles for both adults and non-adults, and representative examples include light incontinence pads, urine absorption pads, pants-type paper diapers, tape-fastened paper diapers, sanitary products, etc. Various paper diapers as outerwear may be combined with the absorbent article 10 as innerwear. The absorbent article 10 is thin yet has an absorbent body with excellent absorption performance and ease of walking, and can be used suitably by users who do not want others to notice that they are wearing it.

[0017] 1 and 2, the absorbent article 10 comprises a liquid-permeable top sheet 11 on the skin side, a liquid-impermeable back sheet 12 on the non-skin side, an absorbent body 13 disposed between the top sheet 11 and the back sheet 12, a liquid-permeable first intermediate sheet 14 enveloping the absorbent body 13, and a liquid-permeable second intermediate sheet 15 disposed within the first intermediate sheet 14. In addition to these, the absorbent article 10 of this embodiment comprises three-dimensional gathers 16 on both sides in the width direction (Y direction) provided on the skin side.

[0018] (Top sheet) The top sheet 11 is a liquid-permeable sheet-like substrate that quickly passes bodily fluids toward the absorbent 13 and diffuses the bodily fluids in the surface direction of the absorbent 13. The top sheet 11 is a sheet that is located on the skin side when worn, and is arranged opposite the back sheet 12 with the absorbent 13 in between. The top sheet 11 is preferably a substrate that is soft to the touch and does not irritate the skin so that it may be directly abutted against the wearer's skin. Examples of substrates include hydrophilic sheets, composite nonwoven fabrics that are laminates of the same or different hydrophilic sheets, open-type films such as open-type polyethylene films, and foamed films such as polyethylene foam and urethane foam. Examples of hydrophilic sheets include air-through nonwoven fabrics, thermal bond nonwoven fabrics, spunlace nonwoven fabrics, spunbond nonwoven fabrics, and the like, which are made using one or more of synthetic fibers made of synthetic resins such as polypropylene, polyethylene, and polyester, regenerated fibers such as rayon, and natural fibers such as cotton.

[0019] In order to improve the liquid permeability of the topsheet 11, the surface thereof may be embossed or perforated. As methods for performing these embossing and perforating processes, known methods can be implemented without limitation. Further, in order to reduce irritation to the skin, the topsheet 11 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent, etc. The shape of the topsheet 11 is not particularly limited, and it may have a size necessary for guiding body fluid to the absorber 13 so as not to leak, and may be a shape that covers part or all of the absorber 13.

[0020] (Backsheet) The backsheet 12 is a sheet located on the non-skin side during wearing. The backsheet 12 may be formed using a liquid-impermeable base material that prevents the body fluid held by the absorber 13 from wetting the wearer's clothing. Examples of the base material include a resin film, a composite sheet that is a laminate of a resin film and a non-woven fabric, etc. The non-woven fabric used in the composite sheet is not particularly limited in the manufacturing method, and examples thereof include single-layer non-woven fabrics such as spunbond non-woven fabric and meltblown non-woven fabric, composite non-woven fabrics such as spunbond non-woven fabric / meltblown non-woven fabric laminate and spunbond non-woven fabric / meltblown non-woven fabric / spunbond non-woven fabric laminate, and these composite materials, etc. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, a composite film of polyethylene and polypropylene, etc.

[0021] It is preferable to provide the backsheet 12 with air permeability in order to prevent stuffiness during wearing. In order to provide the backsheet 12 with air permeability, for example, a filler may be blended into the resin film of the base material, or the backsheet 12 may be embossed. Examples of the filler include calcium carbonate, and the blending method can be performed using known methods without limitation.

[0022] (Absorber) As shown in Figs. 1 to 4, the absorbent body 13 has an upper absorbent body 17 located relatively closer to the skin and a lower absorbent body 18 located relatively closer to the non-skin side, and is arranged in layers so as to overlap each other. The upper absorbent body 17 and the lower absorbent body 18 are wrapped in a first intermediate sheet 14 described later. A second intermediate sheet 15 described later is arranged between the upper absorbent body 17 and the lower absorbent body 18. In the present disclosure, the side located closer to the skin is referred to as the upper layer, and the side located closer to the non-skin side is referred to as the lower layer. In the present embodiment, the size (length in the longitudinal direction and length in the width direction) of the lower absorbent body 18 is smaller than that of the upper absorbent body 17, but this is not limited thereto, and the size of the lower absorbent body 18 may be larger than that of the upper absorbent body 17, or they may be the same size.

[0023] (Upper absorber) As shown in Figs. 1 to 3, the upper absorbent body 17 has a basis weight of 50 g / m 2 More than 130g / m 2 It is composed of the following pulp fibers and superabsorbent polymer (hereinafter referred to as "SAP"), and has a slit 19 extending along the longitudinal direction (X direction) in the center in the width direction. The slit 19 is an area where pulp fibers and SAP are not arranged, and extends in the longitudinal direction while penetrating in the thickness direction (Z direction). In Fig. 2, the hatched parts of the upper absorbent body 17 indicate parts containing pulp fibers and SAP, and the non-hatched parts indicate the slits 19.

[0024] The pulp fibers used in the upper absorbent body 17 are not particularly limited as long as they are generally used in absorbent articles such as sanitary napkins, disposable diapers, light incontinence liners, and urine pads, and examples thereof include wood pulp (e.g., bleached coniferous kraft pulp (N-BKP) such as southern pine and Douglas fir), synthetic fibers, resin fibers, non-wood pulp, etc. that have been defibrated into a cotton-like form.

[0025] The SAP used in the upper absorbent body 17 and the lower absorbent body 18 described below is not particularly limited as long as it can absorb body fluids and prevent backflow, and examples thereof include polyacrylates, polyaspartates, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers, and saponification products thereof. Among these, from the viewpoint of absorption amount per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. The SAP can be used alone or in combination of two or more.

[0026] The blending ratio of pulp fiber and SAP in the upper absorbent body 17 is 50% by weight or more and 100% by weight or less of pulp fiber, and 0% by weight or more and 50% by weight or less of SAP. In other words, the upper absorbent body 17 may contain no SAP and be composed only of pulp fiber. In the upper absorbent body 17 containing SAP, the pulp fiber and SAP are preferably formed by mixing SAP particles in the pulp fiber.

[0027] The length L2 of the slit 19 in the upper absorbent body 17 in the longitudinal direction is preferably 50% or more and 100% or less of the total length L1 in the longitudinal direction of the maximum part of the upper absorbent body 17 and the lower absorbent body 18. If the length L2 of the slit 19 in the longitudinal direction is shorter than 50% of the total length L1 in the longitudinal direction of the maximum part of the upper absorbent body 17 and the lower absorbent body 18, the diffusion of the body fluid may be insufficient when the body fluid is repeatedly absorbed, and the absorption capacity of the lower absorbent body 18 may not be fully utilized. In FIG. 3, the length L2 of the slit 19 in the longitudinal direction is shorter than the total length L1 (100%), but is not limited to this and may be the same length (100%) as the total length L1. In this case, the upper absorbent body 17 may be an absorbent body divided into both sides in the width direction. In addition, in this embodiment, the longitudinal length of the upper absorbent body 17 is longer than the longitudinal length of the lower absorbent body 18 (the distance between the longitudinal outer ends of the Y-shaped absorbent section 18a described later), so in Figure 3, the longitudinal length of the upper absorbent body 17 is the total longitudinal length L1 of the maximum part of the upper absorbent body 17 and the lower absorbent body 18.

[0028] The widthwise length W2 of the slit 19 of the upper absorbent body 17 is preferably 5% to 20% of the total length W1 of the smallest parts of the upper absorbent body 17 and the lower absorbent body 18. If the widthwise length W2 of the slit 19 is shorter than 5% of the total length W1 of the smallest parts of the upper absorbent body 17 and the lower absorbent body 18, a sufficient diffusion path for bodily fluids cannot be secured, and the absorption speed may be slowed. On the other hand, if the widthwise length W2 of the slit 19 is longer than 20% of the total length W1 of the smallest parts of the upper absorbent body 17 and the lower absorbent body 18, there is a risk that the shape retention of the absorbent body 13 cannot be maintained due to the load when the body position is changed after absorbing bodily fluids. In this embodiment, the widthwise length of the upper absorbent body 17 is longer than the widthwise length of the lower absorbent body 18 (the distance between the outer ends of both widthwise sides of the Y-shaped absorbent section 18a described later), so in Figure 3, the widthwise length of the upper absorbent body 17 is the total widthwise length W1 of the maximum part of the upper absorbent body 17 and the lower absorbent body 18.

[0029] (Lower absorbent layer) 1, 2, and 4, the lower absorbent body 18 has Y-shaped absorbent sections 18a on both sides in the longitudinal direction, which do not contain pulp fibers and in which SAPs are arranged in a Y shape. In this specification, "Y-shaped" includes "approximately Y-shaped".

[0030] The Y-shaped absorber portions 18a on both sides in the longitudinal direction each have a first region 20 extending in the longitudinal direction at the center in the width direction, and a pair of second regions 21 that become increasingly spaced apart in the width direction from the outer longitudinal ends of the first region 20 toward the outside in the longitudinal direction.

[0031] (1st area) The first regions 20 of the Y-shaped absorbent portions 18a on both sides in the longitudinal direction are disposed apart from each other in the longitudinal direction. The first regions 20 of the Y-shaped absorbent portions 18a in this embodiment extend linearly in the longitudinal direction. Between the first regions 20 of the Y-shaped absorbent portions 18a on both sides in the longitudinal direction, a region 22 where SAP is not disposed (hereinafter referred to as "SAP-free region 22") is provided. The SAP-free region 22 in this embodiment is disposed in the longitudinal center of the Y-shaped absorbent portions 18a on both sides in the longitudinal direction. The Y-shaped absorbent portions 18a on both sides in the longitudinal direction may be disposed symmetrically in the longitudinal direction or asymmetrically. In other words, the longitudinal lengths of the first regions 20 may be set to different lengths, and the SAP-free region 22 may be disposed at a position biased to one side in the longitudinal direction of the Y-shaped absorbent portions 18a on both sides in the longitudinal direction.

[0032] The first region 20 of the Y-shaped absorbent section 18a is located on the non-skin side of the slit 19 of the upper absorbent body 17. That is, as shown in Fig. 1, in a plan view of the absorbent article 10, the first region 20 and the non-SAP region 22 of the Y-shaped absorbent section 18a on both sides in the longitudinal direction overlap with the slit 19 of the upper absorbent body 17 in the thickness direction.

[0033] The longitudinal length L3 of the non-SAP regions 22 (the longitudinal separation distance between the first regions 20) is preferably 50 mm or more and 200 mm or less. If the length L3 of the non-SAP regions 22 is made shorter than 50 mm, there is a risk that the SAP in the crotch area will swell after absorbing bodily fluids, interfering with movements such as walking. On the other hand, if the length L3 of the non-SAP regions 22 is made longer than 200 mm, bodily fluids will be less likely to diffuse to the separated first regions 20 of the Y-shaped absorbent section 18a, and there is a risk that the absorbency of the entire lower absorbent body 18 will not be fully utilized.

[0034] (Second area) A pair of second regions 21 of the Y-shaped absorbent portion 18a on both sides in the longitudinal direction extend outward in the longitudinal direction so as to spread outward from the outer longitudinal ends of the first region 20 to both sides in the width direction. The pair of second regions 21 of the Y-shaped absorbent portion 18a in this embodiment extend linearly while being inclined with respect to the longitudinal direction.

[0035] (Method of forming Y-shaped absorbing part) The following describes one example of a method for forming the Y-shaped absorbent section 18a of the lower absorbent body 18. Note that the method for forming the Y-shaped absorbent section 18a is not limited to the following method, and any other method that does not contain pulp fibers and can arrange SAP in a Y shape may be used.

[0036] 4, for example, a Y-shaped absorbent section 18a may be formed by providing a base nonwoven fabric 23, applying adhesive in a Y-shape on both longitudinal sides of the base nonwoven fabric 23, and adhering SAP to the areas where the adhesive is applied. Alternatively, SAP may be arranged in a Y-shape between two sheets of base nonwoven fabric 23 on both longitudinal sides, and the two sheets of base nonwoven fabric 23 may be adhered to surround the SAP arranged in the Y-shape.

[0037] An example of an adhesive for bonding the SAP to the base nonwoven fabric 23 is a hot melt adhesive. Examples of hot melt adhesives include hot melt adhesives such as styrene-butadiene-styrene copolymers, synthetic rubber hot melt adhesives such as styrene-isoprene-styrene copolymers, and olefin hot melt adhesives such as ethylene-vinyl acetate copolymers. Known methods can be used to apply the hot melt adhesive, such as a curtain coat method or a spiral method in which the molten hot melt adhesive is applied from a nozzle in a non-contact manner, or a slot method in which the adhesive is applied in a contact manner.

[0038] In this embodiment, the Y-shaped absorbent portion 18a is formed by adhering SAP in a Y shape to the base nonwoven fabric 23, but this is not limited to this. For example, the Y-shaped absorbent portion 18a may be formed by adhering SAP in a Y shape to the first intermediate sheet 14 or the second intermediate sheet 15 described below.

[0039] (First intermediate sheet) The first intermediate sheet 14 is a liquid-permeable sheet, and is located between the top sheet 11 and the back sheet 12, and envelops the upper absorbent body 17 and the lower absorbent body 18. The base material of the first intermediate sheet 14 may be any material that has a faster body fluid permeation rate than the top sheet 11 and quickly diffuses body fluid into the absorbent body 13. Examples of the base material include hydrophilic nonwoven fabrics such as tissue, absorbent paper, airlaid nonwoven fabric, and spunbond nonwoven fabric. In FIG. 2, both ends of the first intermediate sheet 14 in the width direction are overlapped with each other on the skin side (top sheet 11 side) of the absorbent body 13, but this is not limiting, and for example, they may be overlapped with each other on the non-skin side (back sheet 12 side) of the absorbent body 13.

[0040] The basis weight of the first intermediate sheet 14 is 10 g / m 2 More than 40g / m 2 The following is preferable: When the basis weight of the first intermediate sheet 14 is within the above range, liquid can be sufficiently diffused over the entire upper surface of the absorbent body 13, and the shape of the absorbent body 13 can be stabilized.

[0041] (Second intermediate sheet) The second intermediate sheet 15 is a liquid-permeable sheet, and is disposed between the upper absorbent body 17 and the lower absorbent body 18. The substrate of the second intermediate sheet 15 may be any substrate having hydrophilic properties, and examples of such substrates include hydrophilic nonwoven fabrics such as tissue, absorbent paper, airlaid nonwoven fabrics, and spunbonded nonwoven fabrics. The substrate of the second intermediate sheet 15 may be the same substrate as that of the first intermediate sheet 14, or may be a different substrate.

[0042] (3D gathers) As shown in Fig. 1 and Fig. 2, the left and right three-dimensional gathers 16 are provided on both the left and right sides of the skin-facing side of the absorbent article 10 to prevent side leakage of bodily fluids excreted by the wearer. The three-dimensional gathers 16 are provided on both widthwise ends of the skin-facing side of the top sheet 11 so as to extend along the longitudinal direction. The three-dimensional gathers 16 include a water-repellent and / or waterproof gathered sheet 16a, and an elastic stretchable member 16b such as rubber thread that is provided on the free end side (inner end side in the widthwise direction) of the gathered sheet 16a and provides standing ability. Note that, although the absorbent article 10 is provided with the left and right three-dimensional gathers 16 in this embodiment, the left and right three-dimensional gathers 16 may not be provided.

[0043] In the absorbent article 10 constructed as described above, the upper absorbent body 17 contains 50% by weight or more of pulp fibers and has slits 19 extending along the longitudinal direction, so that a high water absorption rate can be ensured.

[0044] Additionally, the upper absorbent body 17 has a slit 19 extending along the longitudinal direction in the widthwise center, and the lower absorbent body 18 has Y-shaped absorbent sections 18a on both longitudinal sides, which do not contain pulp fibers and in which SAP is arranged in a Y shape. This allows bodily fluids that pass through the slits 19 of the upper absorbent body 17 to escape radially to both longitudinal sides and both widthwise sides by the Y-shaped absorbent sections 18a of the lower absorbent body 18. This makes it possible to reduce the effect on the crotch area even if the SAP absorbs bodily fluids and expands, ensuring ease of walking.

[0045] Additionally, the first regions 20 of the Y-shaped absorbent section 18a of the lower absorbent body 18 are spaced apart from each other in the longitudinal direction, and non-SAP regions 22 are provided between the first regions 20. As a result, bodily fluids that have passed through the slits 19 of the upper absorbent body 17 can be quickly diffused by the non-SAP regions 22, and the area that swells can be reduced, ensuring ease of walking (ease of movement).

[0046] Furthermore, bodily fluids can be absorbed by the SAP of both the upper absorbent body 17 and the lower absorbent body 18, and backflow of bodily fluids can be suppressed.

[0047] The weight of the pulp fiber of the upper absorbent body 17 is 130 g / m 2 or less, and since the lower absorbent body 18 does not contain pulp fibers, the thickness of the absorbent body 13 can be reduced, and the thickness of the absorbent article 10 as a whole can also be reduced.

[0048] Furthermore, the upper absorbent body 17 contains 50% by weight or more of pulp fibers, so that it has a pleasant feel against the skin.

[0049] In addition, since it is provided with a liquid-permeable first intermediate sheet 14 that wraps the upper absorbent body 17 and the lower absorbent body 18, it is possible to quickly diffuse body fluids into the absorbent body 13 and to stabilize the shape of the two-layer absorbent body 13 (upper absorbent body 17 and lower absorbent body 18).

[0050] Since it is provided with a liquid-permeable second intermediate sheet 15 arranged between the upper absorbent body 17 and the lower absorbent body 18, bodily fluids that cannot be absorbed by the upper absorbent body 17 can be quickly diffused to the lower absorbent body 18.

[0051] Therefore, according to this embodiment, it is possible to provide an absorbent article 10 that is thin yet has excellent absorption performance and is easy to walk in.

[0052] Furthermore, since the first region 20 of the Y-shaped absorbent section 18a of the lower absorbent body 18 is located on the non-skin side of the slits 19 of the upper absorbent body 17, bodily fluids that pass through the slits 19 of the upper absorbent body 17 can be reliably guided to the first region 20 of the Y-shaped absorbent section 18a.

[0053] In this embodiment, the absorbent article according to the present disclosure is applied to a pad-type product, but is not limited to this and can also be applied to paper diaper products such as pants-type paper diapers and tape-fastened paper diapers.

[0054] Although the present invention has been described based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Explanation of symbols]

[0055] 10: Absorbent articles 11: Top sheet 12: Back seat 13: Absorbent 14: First intermediate sheet 15: Second intermediate sheet 17: Upper absorbent 18: Lower absorbent 18a: Y-shaped absorbing section 19: Slit 20:First area 21:Second area 22: SAP non-placement area (area)

Claims

1. a liquid-permeable topsheet on the skin side, a liquid-impermeable backsheet on the non-skin side, an upper absorber on the skin side and a lower absorber on the non-skin side, and an absorber disposed between the topsheet and the backsheet, a liquid-permeable first intermediate sheet positioned between the topsheet and the backsheet and wrapping the upper absorber and the lower absorber, and a liquid-permeable second intermediate sheet disposed between the upper absorber and the lower absorber, The upper absorbent body is composed of pulp fibers of 50% by weight or more and 100% by weight or less, 50 g / m ２ or more and 130 g / m ２ or less, and a superabsorbent polymer of 0% by weight or more and 50% by weight or less, and has a slit extending along the longitudinal direction at the central portion in the width direction. wherein the lower absorber has Y-shaped absorption portions in which superabsorbent polymers are arranged in a Y shape on both longitudinal sides without containing pulp fibers, the Y-shaped absorption portions on both longitudinal sides each have a first region extending longitudinally at the center in the width direction and a pair of second regions spaced apart from each other in the width direction toward the outside in the longitudinal direction from the outer end in the longitudinal direction of the first region, the first regions of the Y-shaped absorption portions on both longitudinal sides are spaced apart from each other in the longitudinal direction, and a region where no superabsorbent polymer is disposed is provided between the first regions. The absorbent article is characterized by the above.

2. The longitudinal length of the slit in the upper absorber is 50% or more and 100% or less of the total length of the maximum portions of the upper absorber and the lower absorber, and the widthwise length of the slit in the upper absorber is 5% or more and 20% or less of the total length of the minimum portions of the upper absorber and the lower absorber. The absorbent article according to claim 1, characterized by the above.

3. The first region of the Y-shaped absorption portion of the lower absorber is located on the non-skin side of the slit in the upper absorber. The absorbent article according to claim 1 or claim 2, characterized by the above.

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