Absorbent article

Abstract

To provide an absorbent article which is excellent in fitting feeling, wearing feeling and absorption performance.SOLUTION: An absorbent article comprises: a liquid permeable top sheet; a liquid impermeable back sheet; and an absorber arranged between the top sheet and the back sheet. The absorber comprises: two layers of absorbers being upper layer and lower layer absorbers; a first intermediate sheet which has liquid permeability and wraps the two layers of absorbers; and a second intermediate sheet which has liquid permeability and is provided between the upper layer and the lower layer absorbers. The upper layer absorber is formed of: pulp fibers which are included by 40 weight% or more and 100 weight% or less and have basis weight of 50 g / m2 or more and 130 g / m2 or less; and a high absorbent polymer which is included by 0 weight% or more and 60 weight% or less. The lower layer absorber is formed of only the high absorbent polymer. On each of width center parts of the upper layer and lower layer absorbers, a single slit along a longer direction and on which no absorber is arranged, is provided on a position where the upper layer and lower layer absorbers overlap.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an absorbent article having an absorbent core which is thin yet has excellent absorption performance and soft feel against the skin. [Background technology]

[0002] Conventionally, absorbent articles such as urine absorption pads, panty liners, sanitary napkins, and disposable diapers generally have a structure having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet, and in such cases, the absorbent body often has a superabsorbent polymer (SAP) mixed into a base material such as pulp. A user wears an absorbent article in their underwear or a pants-type absorbent article, causing the absorbent article to absorb liquids such as blood and urine (hereinafter referred to as body fluids).

[0003] There are many situations in which absorbent articles absorb large amounts of body fluids when worn for long periods of time, and development is being conducted on compositions, structures, etc. for each component to prevent side leakage of body fluids and improve the fit when worn.

[0004] Patent Document 1 discloses an absorbent article in which a water-absorbent sheet is interposed between a top sheet and a back sheet, the water-absorbent sheet comprising a first sheet, a second sheet, and water-absorbent resin powder fixed between these sheets with an adhesive, a plurality of regions in which the water-absorbent resin powder is present are formed between the first sheet and the second sheet, the plurality of regions each extending in the longitudinal direction of the water-absorbent sheet and arranged in parallel at predetermined intervals in the width direction of the water-absorbent sheet, a non-presence region in which no water-absorbent resin powder is present is formed between adjacent regions and at both ends in the width direction of the water-absorbent sheet, the first sheet and the second sheet are joined in the non-presence region, a part of the non-presence region is a sheet peeling region, and the sheet peeling region is configured so that the first sheet and the second sheet are peeled off due to the absorption and swelling of the water-absorbent resin powder.

[0005] Absorbent articles using thin absorbents are required from the viewpoints of wearing comfort, ease of movement, effect on outerwear, storage, transportability, etc., and the thickness can be reduced by reducing the ratio of pulp fiber among the pulp fiber and superabsorbent polymer (SAP) that compose the absorbent. However, there are issues that increasing the ratio of SAP reduces the water absorption speed and also reduces the feel against the skin. In addition, the thickness can be reduced by reducing the total weight of the absorbent, but there is also the issue that the maximum absorption capacity of the absorbent article decreases and liquid return is more likely to occur when a load is applied. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2009-061230 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorbent article having an absorbent core which is thin yet has excellent absorption performance and a pleasant feel against the skin. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention is realized by the following configuration. (1) The absorbent article of the present invention is an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, the absorbent body having two absorbent layers, an upper absorbent layer and a lower absorbent layer, a liquid-permeable first intermediate sheet enveloping the two absorbent layers, and a liquid-permeable second intermediate sheet disposed between the upper absorbent layer and the lower absorbent layer, the upper absorbent layer having a basis weight of 50 g / m 2 More than 130g / m 2The absorbent article is characterized in that it contains 40% by weight or more and 100% by weight or less of the following pulp fibers and 0% by weight or more and 60% by weight or less of superabsorbent polymer, the lower absorbent body contains only superabsorbent polymer, and both the upper absorbent body and the lower absorbent body have a slit in the widthwise center that is approximately parallel to the longitudinal direction of the absorbent article and is free of absorbent body, at a position where the upper absorbent body and the lower absorbent body overlap in the thickness direction.

[0009] (2) The absorbent article of the present invention, in the configuration of (1), is characterized in that the slit has a longitudinal dimension that is 50% or more and 100% or less of the maximum longitudinal dimension of the two-layer absorbent body, and a widthwise dimension that is 5% or more and 20% or less of the minimum widthwise dimension of the two-layer absorbent body.

[0010] The absorbent article of the present invention has a basis weight of pulp fibers of the upper absorbent body of 130 g / m 2 As described below, the lower absorbent body does not contain pulp fibers, which allows the thickness of the absorbent article to be reduced, the highly absorbent polymers in the upper and lower absorbent bodies prevent liquid returning, and the upper absorbent body has a pulp fiber ratio of 40% or more by weight, which provides a good feel against the skin, and the presence of slits provides a high water absorption rate. Effect of the Invention

[0011] According to the present invention, it is possible to provide an absorbent article having an absorbent core which is thin yet has excellent absorption performance and a pleasant feel against the skin. [Brief description of the drawings]

[0012] [Figure 1] 1 is a plan view showing an embodiment of an absorbent article according to the present invention. [Diagram 2] 2 is a cross-sectional view showing a part of the cross section AA in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (Embodiment) In order to solve the above problems, preferred embodiments of the absorbent article of the present invention (hereinafter, referred to as embodiments) will be described in detail below. In the description of the embodiments, like elements are numbered the same throughout.

[0014] In this specification, "body fluid" refers to liquids such as blood, urine, etc. Furthermore, the "longitudinal direction" of an absorbent article, etc. refers to the direction that runs from the front to the back of the user when the absorbent article is worn, and the "width direction" of an absorbent article, etc. refers to the direction horizontal to or perpendicular to the "longitudinal direction." Furthermore, the "thickness direction" refers to the direction perpendicular to both the "longitudinal direction" and the "width direction."

[0015] (Absorbent articles) An embodiment of an absorbent article 1 of the present invention will be described with reference to Figures 1 and 2. The absorbent article 1 comprises, in order from the side that contacts the skin, a liquid-permeable top sheet 2, an absorbent body 3, and a liquid-impermeable back sheet 4. The absorbent body 3 comprises an upper-layer absorbent body 31 located in the upper layer, a lower-layer absorbent body 32 located in the lower layer, a liquid-permeable first intermediate sheet 5 that encases the upper-layer absorbent body 31 and the lower-layer absorbent body 32, and a liquid-permeable second intermediate sheet 6 that is present between the upper-layer absorbent body 31 and the lower-layer absorbent body 32. Furthermore, a slit 7 is formed in the upper-layer absorbent body 31 and the lower-layer absorbent body 32 along the longitudinal direction at the center in the width direction.

[0016] The absorbent article 1 of the present invention is not particularly limited, but examples thereof include urine absorption pads, panty liners, sanitary napkins, and paper diapers.

[0017] (Top sheet) The substrate of the top sheet 2 of this embodiment only needs to have liquid permeability that allows blood, body fluids, and other liquids to move to the absorbent 3, and is formed from materials such as nonwoven fabrics such as thermal bonded nonwoven fabrics, typified by air-through nonwoven fabrics, composite nonwoven fabrics laminated with thermal bond / spunbond, openable films such as open-pore polyethylene films, foamed films such as polyethylene foam and urethane foam, or composite sheets laminated with these. Of these, air-through nonwoven fabrics and openable films with a funnel-shaped cross section are preferred from the viewpoint of preventing backflow of urine, etc.

[0018] Furthermore, in order to improve liquid permeability, it is preferable to subject the top sheet 2 to embossing or perforation. The processing method can be any known method without any restrictions. In order to reduce irritation to the skin, it is also preferable for the top sheet 2 to contain lotion, antioxidant, anti-inflammatory component, pH adjuster, antibacterial agent, moisturizer, etc. Furthermore, from the viewpoints of strength and processability, the basis weight of the top sheet 2 is preferably 10 g / m 2 More than 50g / m 2 The following is preferred:

[0019] (Back seat) The substrate of the back sheet 4 of this embodiment may be any material that is impermeable to liquid so that the body fluid held by the absorbent 3 does not leak into the underwear, and is formed from a material such as a nonwoven fabric, a resin film, or a composite sheet obtained by laminating these. There are no particular limitations on the manufacturing method of such a nonwoven fabric, and examples thereof include spunbond or meltblown nonwoven fabric, or composite nonwoven fabrics obtained by laminating spunbond / meltblown or spunbond / meltblown / spunbond, and composite materials thereof. Examples of such resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, and composite films of polyethylene and polypropylene. The back sheet 4 is preferably provided with an adhesive portion (not shown) that is attached to underwear or the like.

[0020] The basis weight of the back sheet 4 is set to 15 g / m from the viewpoints of strength and processability. 2 More than 60g / m 2It is preferable that the back sheet 4 has moisture permeability in order to prevent stuffiness during wearing. For example, the back sheet 4 may be imparted with moisture permeability by blending a filler in the resin film of the base material or by embossing the back sheet 4. An example of the filler is calcium carbonate, and the processing method may be any known method without any restrictions.

[0021] (Absorbent) The absorbent body 3 of this embodiment is arranged between the top sheet 2 and the back sheet 4, and has two absorbent layers 3, an upper absorbent layer 31 and a lower absorbent layer 32, a liquid-permeable first intermediate sheet 5 that envelops the two layers of the upper absorbent layer 31 and the lower absorbent layer 32, and a liquid-impermeable second intermediate sheet 6 that is located between the upper absorbent layer 31 and the lower absorbent layer 32.

[0022] (Upper absorber) The upper absorbent body 31 is composed of pulp fiber as a base material and superabsorbent polymer (SAP). The pulp fiber is not particularly limited as long as it is generally used in absorbent articles such as sanitary napkins, diapers, and urine absorption pads, and is formed from materials such as fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic nonwoven fabric. Among these, fluff pulp is preferred from the viewpoint of absorbency. Examples of such fluff pulp include wood pulp and non-wood pulp such as synthetic fiber and polymer fiber that has been defibrated into a cotton-like state.

[0023] The basis weight of the pulp fiber used as the base material of the upper absorbent body 31 is 50 g / m 2 More than 130g / m 2 The basis weight of the pulp fiber is 50 g / m 2 If the weight is less than 130g / m, the amount of liquid returning increases and the texture deteriorates. 2 If the thickness exceeds this value, the absorbent body 3 becomes thick.

[0024] The superabsorbent polymer (SAP) contained in the upper absorbent body 31 is not particularly limited as long as it can absorb body fluids and prevent backflow, and may be formed from materials such as sodium polyacrylate, polyaspartic acid, (starch-acrylic acid) graft copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and saponification products thereof, for example. Among these, sodium polyacrylate is preferred from the viewpoint of absorption per weight.

[0025] The weight ratio of pulp fiber is 40% by weight or more and 100% by weight or less, and the weight ratio of superabsorbent polymer (SAP) is 0% by weight or more and 60% by weight or less in the upper absorbent body 31. If the weight ratio of pulp fiber is less than 40% by weight or the weight ratio of superabsorbent polymer (SAP) exceeds 60% by weight, the absorption performance and the feel on the skin are impaired.

[0026] (Lower absorbent layer) The lower-layer absorbent body 32 contains only superabsorbent polymer (SAP). There are no particular limitations on the superabsorbent polymer (SAP) contained in the lower-layer absorbent body 32 as long as it can absorb body fluids and prevent backflow, and it is formed from materials such as sodium polyacrylate, polyaspartic acid, (starch-acrylic acid) graft copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and saponified products thereof. Of these, sodium polyacrylate is preferred from the viewpoint of absorption capacity per weight. Furthermore, in order not to impair absorption performance and texture, the basis weight of the superabsorbent polymer (SAP) of the lower-layer absorbent body 32 is set to 100 g / m. 2 More than 500g / m 2 It is preferable that:

[0027] (First intermediate sheet) The first intermediate sheet 5 is liquid permeable and is used to collectively encase the upper absorbent body 31 and the lower absorbent body 32. The first intermediate sheet 5 allows bodily fluids to be quickly diffused into the absorbent body 3, and can stabilize the shape of the two-layer absorbent body 3.

[0028] The base material of the first intermediate sheet 5 may be any material that has a faster body fluid permeability rate than the top sheet 2 and quickly diffuses body fluid into the absorbent body 3. Examples of the base material include hydrophilic nonwoven fabrics such as tissue, absorbent paper, airlaid nonwoven fabrics, and spunbond nonwoven fabrics.

[0029] The basis weight of the first intermediate sheet 5 is 10 g / m 2 More than 40g / m 2 The following is preferable. By having the basis weight in the above range, the liquid can be sufficiently diffused over the entire upper surface of the absorbent body 3, and the shape of the absorbent body 3 can be stabilized.

[0030] (Second intermediate sheet) The second intermediate sheet 6 is liquid permeable and is used to be interposed between the upper absorbent body 31 and the lower absorbent body 32. This second intermediate sheet 6 can quickly diffuse bodily fluid that cannot be absorbed by the upper absorbent body 31 to the lower absorbent body 32.

[0031] The base material of the second intermediate sheet 6 may be any material that has hydrophilicity, and examples of such materials include hydrophilic nonwoven fabrics such as tissue, absorbent paper, airlaid nonwoven fabrics, and spunbond nonwoven fabrics.

[0032] (slit) A slit 7 is formed in the widthwise center of both the upper absorbent body 31 and the lower absorbent body 32, which is approximately parallel to the longitudinal direction of the absorbent article 1. The slit 7 penetrates the upper absorbent body 31 and the lower absorbent body 32 in the thickness direction, and one slit is provided at a position where the upper absorbent body 31 and the lower absorbent body 32 overlap in the thickness direction so that the absorbent body 3 is not present. By having this slit 7, bodily fluids can quickly flow around to the lower surface side of the upper absorbent body 31 and the upper and lower surfaces of the lower absorbent body 32, thereby achieving a high water absorption rate.

[0033] The longitudinal dimension of the slit 7 is preferably 50% to 100% of the maximum longitudinal dimension of the upper absorbent body 31 and the lower absorbent body 32. If the longitudinal dimension of the slit 7 is less than 50%, the water absorption rate will be poor. The widthwise dimension of the slit 7 is preferably 5% to 20% of the minimum widthwise dimension of the upper absorbent body 31 and the lower absorbent body 32. If the widthwise dimension of the slit 7 is less than 5%, the water absorption rate will be poor, and if it exceeds 20%, the amount of liquid return will increase and the feel will be impaired.

[0034] Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications or improvements can be made to the above embodiments. In addition, it is clear from the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention. EXAMPLES

[0035] The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to the description of the following examples as long as it does not depart from the gist of the present invention.

[0036] (Example) In this embodiment, the top sheet 2 has a basis weight of 20 g / m 2 The back sheet 4 is made of an air-through nonwoven fabric having a basis weight of 18 g / m 2 A breathable polyethylene film having a basis weight of 16 g / m was used as the first intermediate sheet 5. 2 The second intermediate sheet 6 is made of tissue having a basis weight of 15 g / m 2 A spunbond nonwoven fabric was used.

[0037] Example 1 On the first intermediate sheet 5, 19g of superabsorbent polymer (SAP) was laminated in an area of ​​450mm in length (longitudinal direction) and 150mm in width (transverse direction), and then the second intermediate sheet 6 was laminated, and further, 6.5g of fluff pulp obtained by pulverizing and defibrating a pulp sheet and 5.8g of superabsorbent polymer (SAP) were mixed and laminated, and the laminated components were wrapped with the first intermediate sheet 5 to produce an absorbent body 3 having an upper absorbent body 31 and a lower absorbent body 32. The superabsorbent polymer (SAP) of the lower absorbent body 32 and the mixture of fluff pulp and superabsorbent polymer (SAP) of the upper absorbent body 31 were laminated in the center in the width direction, avoiding the range of the slit part so that one slit (10mm in width direction, 300mm in length direction) extending in the longitudinal direction was formed. Furthermore, the top sheet 2, the back sheet 4, and the absorbent body 3 were integrated by bonding with a hot melt adhesive to obtain an absorbent article 1.

[0038] Example 2 An absorbent article 1 was produced in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 7.7 g and the amount of superabsorbent polymer (SAP) was 6.8 g.

[0039] Example 3 An absorbent article 1 was produced in the same manner as in Example 1, except that the amount of superabsorbent polymer (SAP) in the upper absorbent body 31 was set to 1.6 g.

[0040] Example 4 The absorbent article 1 was prepared in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 6.4 g, the amount of superabsorbent polymer (SAP) was 5.7 g, the amount of superabsorbent polymer (SAP) in the lower absorbent body 32 was 18 g, and the longitudinal dimension of the slit was 405 mm.

[0041] Example 5 The absorbent article 1 was prepared in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 6.2 g, the amount of superabsorbent polymer (SAP) was 5.5 g, the amount of superabsorbent polymer (SAP) in the lower absorbent body 32 was 18 g, and the width dimension of the slit was 20 mm.

[0042] Comparative Example 1 An absorbent article 1 was produced in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 9.7 g and the amount of superabsorbent polymer (SAP) was 8.6 g.

[0043] Comparative Example 2 An absorbent article 1 was produced in the same manner as in Example 1, except for the step of laminating the superabsorbent polymer (SAP) of the lower absorbent body 32 and the second intermediate sheet 6, and for using a single absorbent body.

[0044] Comparative Example 3 The absorbent article 1 was produced in the same manner as in Example 1, except that the upper absorbent body 31 had a fluff pulp amount of 6.8 g, the amount of superabsorbent polymer (SAP) was 6.1 g, the lower absorbent body 32 had a superabsorbent polymer (SAP) amount of 20 g, and the absorbents were stacked so that slits 7 were not formed.

[0045] Comparative Example 4 An absorbent article 1 was produced in the same manner as in Example 1, except that the amount of superabsorbent polymer (SAP) in the upper absorbent body 31 was 15.0 g.

[0046] Comparative Example 5 An absorbent article 1 was produced in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 1.3 g and the amount of superabsorbent polymer (SAP) was 1.2 g.

[0047] Comparative Example 6 An absorbent article 1 was prepared in the same manner as in Example 1, except that the amount of superabsorbent polymer (SAP) in the lower absorbent body 32 was 20 g and the superabsorbent polymer (SAP) was layered so as to prevent slits from forming in the lower absorbent body 32.

[0048] Comparative Example 7 The absorbent article 1 was produced in the same manner as in Example 1, except that the amount of fluff pulp in the upper absorbent body 31 was 6.8 g, the amount of superabsorbent polymer (SAP) was 6.1 g, and the absorbents were laminated so as not to form slits 7 in the upper absorbent body 31.

[0049] The thickness, water absorption rate, amount of wet-back liquid, and texture of the obtained absorbent article 1 were measured and evaluated according to the following methods. The results are shown in Table 1.

[0050] (Thickness of absorbent article) The thickness of the absorbent article 1 was measured at a position in the center of the longitudinal direction of the absorbent article 1, avoiding the slits, using a thickness gauge (product name: dial thickness gauge "PEACOCK (registered trademark)" manufactured by Ozaki Manufacturing Co., Ltd.) to find a thickness of 35 gf / cm 2 The measurements were carried out under the following loading conditions.

[0051] (Water absorption time (water absorption rate)) 40 mL of saline was injected into the center of the absorbent article 1 in the longitudinal and width directions, and after leaving it for 3 minutes, an additional 40 mL of saline was injected. The time until the second injected saline was completely absorbed by the absorbent article 1 was measured and this was taken as the water absorption rate.

[0052] (Amount of liquid returned) 450 mL of physiological saline was injected into the longitudinal and transverse central portions of the absorbent article 1, and after leaving it to stand for 10 minutes, a filter paper (Advantec No. 2, diameter 55 mm) whose weight had been measured in advance was placed in the center of the injected portion, and a pressure of 35 gf / cm was applied to the filter paper. 2 The weight of the filter paper was measured one minute after the weight was placed on the filter paper, and the difference in weight (g) of the filter paper before and after the test was recorded as the amount of liquid returning.

[0053] (touch) Twenty panelists were asked to touch the center of the absorbent article 1 in the longitudinal and widthwise directions with their hands and were asked to select "feels good against the skin" or "feels bad against the skin." Evaluation was performed according to the following criteria. 〇: "Feels good on the skin" - 14 to 20 people △: 7 to 13 people said "it feels good on the skin" ×: 0 to 6 people said "it feels good on the skin"

[0054] [Table 1]

[0055] As a result, as shown in Table 1, the absorbent article 1 according to this embodiment has two absorbent layers, an upper absorbent body 31 and a lower absorbent body 32, a liquid-permeable first intermediate sheet 5 and a liquid-permeable second intermediate sheet 6. The upper absorbent body 31 has a basis weight of 50 g / m 2 More than 130g / m 2 It has been found that it is preferable that the absorbent article 1 contains 40% by weight or more and 100% by weight or less of the following pulp fibers and 0% by weight or more and 60% by weight or less of superabsorbent polymer, that the lower absorbent body 32 contains only superabsorbent polymer, and that both the upper absorbent body 31 and the lower absorbent body 32 have one slit 7 without absorbent body that is approximately parallel to the longitudinal direction of the absorbent article 1 in the widthwise center at a position where the upper absorbent body 31 and the lower absorbent body 32 overlap in the thickness direction.

[0056] The sack has two absorbent layers, an upper absorbent body 31 and a lower absorbent body 32, a liquid-permeable first intermediate sheet 5 and a liquid-permeable second intermediate sheet 6. The upper absorbent body 31 has a basis weight of 50 g / m 2 More than 130g / m 2 It has been found that an absorbent article 1 having excellent thickness, water absorption speed, amount of liquid return and feel on the skin can be provided by containing 40% by weight or more and 100% by weight or less of the following pulp fibers and 0% by weight or more and 60% by weight or less of superabsorbent polymer, the lower absorbent body 32 containing only superabsorbent polymer, and both the upper absorbent body 31 and the lower absorbent body 32 having one slit 7 without absorbent body that is approximately parallel to the longitudinal direction of the absorbent article 1 in the widthwise center at a position where the upper absorbent body 31 and the lower absorbent body 32 overlap in the thickness direction. [Explanation of symbols]

[0057] 1. Absorbent articles 2 Top sheet 3. Absorber 31 Upper absorber 32 Lower absorbent 4 Back Seat 5. First intermediate sheet 6 Second intermediate sheet 7 Slit

Claims

1. An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent disposed between the top sheet and the back sheet, The absorbent body has two absorbent layers, an upper absorbent body and a lower absorbent body, a liquid-permeable first intermediate sheet enveloping the two absorbent layers, and a liquid-permeable second intermediate sheet present between the upper absorbent body and the lower absorbent body, The upper absorbent body has a basis weight of 50 g / m ２ 130g / m or more ２ The present invention comprises 40% by weight or more and 100% by weight or less of the following pulp fibers and 0% by weight or more and 60% by weight or less of a superabsorbent polymer, The lower absorbent body contains only a superabsorbent polymer, An absorbent article characterized in that both the upper absorbent body and the lower absorbent body have a slit in the widthwise center, where no absorbent body is present, that is approximately parallel to the longitudinal direction of the absorbent article, at a position where the upper absorbent body and the lower absorbent body overlap in the thickness direction.

2. The absorbent article described in claim 1, characterized in that the slit has a longitudinal dimension that is 50% or more and 100% or less of the maximum longitudinal dimension of the two-layer absorbent body, and a widthwise dimension that is 5% or more and 20% or less of the minimum widthwise dimension of the two-layer absorbent body.

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