absorbent articles

Abstract

To provide an absorbent article which is easy to use and has a fastening part which is hard to twist and has good wearability. [Solution] The present disclosure provides an absorbent article 10 comprising a liquid-permeable top sheet 11 on the skin side, a liquid-impermeable back sheet 12 on the non-skin side, and an absorbent 13 arranged between the top sheet 11 and the back sheet 12, and further comprising a fastening part 14 provided on the non-skin side of the absorbent article 10, and a wrinkle prevention sheet 15 having higher rigidity than the back sheet 12 and arranged on at least one of the skin side of the fastening part 14 and around the fastening part 14 to prevent wrinkles.

Description

[Technical Field]

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

[0002] In pad-type absorbent articles used in combination with outerwear or pad-type absorbent articles used alone, the absorbent article is often fixed to a disposable diaper, underwear, etc. using a mechanical hook tape-like fastening material provided on the non-skin side of the backsheet or a slip-preventing material coated with an adhesive on the backsheet to prevent the absorbent article from slipping or sagging when worn.

[0003] For example, Patent Document 1 discloses a napkin. A surface strength reinforcing element comprising a nonwoven fabric and an adhesive for fixing the nonwoven fabric to the backsheet is disposed on the non-skin-facing surface of the backsheet of the absorbent main body of the napkin. The non-skin-facing surface of the nonwoven fabric constituting the surface strength reinforcing element is provided with a hook material, which is made up of a base sheet having a number of engaging protrusions on its surface, as a slippage prevention part for fixing the absorbent main body to clothing.

[0004] Furthermore, Patent Document 2 discloses absorbent articles such as panty liners, sanitary napkins, panty liners, and incontinence pads. An anti-slip adhesive layer is formed on the underwear-contacting surface of the absorbent article. During production, a release material with an anti-slip adhesive layer applied to the entire surface is adhered to the back sheet of the absorbent article, and the anti-slip adhesive layer is transferred. The adhesive that forms the anti-slip adhesive layer is preferably one whose main component is, for example, a styrene-based polymer, a tackifier, or a plasticizer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-96113 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-10883 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when an absorbent article is fastened to a disposable diaper, underwear, etc., it may not be able to follow the wearer's movements, resulting in the absorbent article slipping or becoming distorted. If the absorbent article is not worn properly, the tape-like member that constitutes the fastening part for fastening to underwear, etc. is soft, which may cause the absorbent article to become distorted. In addition, the adhesive of the fastening part may adhere to the backsheet, which may cause the absorbent article to become distorted.

[0007] In the napkin described in Patent Document 1 and the absorbent article described in Patent Document 2, fastening parts such as hook materials and anti-slip adhesive layers are provided on the non-skin side of the absorbent article to firmly fix it to clothing and make it less likely to slip during use, but this does not make the fastening parts less likely to wrinkle or improve wearability.

[0008] Therefore, an object of the present disclosure is to provide an absorbent article that is easy to use, has fastening parts that are less likely to twist, and is comfortable to wear. [Means for solving the problem]

[0009] In order to solve the above problems, a first aspect of the present invention is an absorbent article comprising a liquid-permeable top sheet on the skin side, a liquid-impermeable back sheet on the non-skin side, and an absorbent body arranged between the top sheet and the back sheet, and further comprising a fastening part provided on the non-skin side of the absorbent article, and a wrinkle prevention sheet that has higher rigidity than the back sheet and is arranged on at least one of the skin side of the fastening part and around the fastening part to prevent wrinkles.

[0010] A second aspect of the present invention is an absorbent article of the first aspect, wherein the anti-wrinkle sheet is not positioned within a range of 30% of the longitudinal length of the absorbent article from the longitudinal center of the absorbent article to both sides of the longitudinal direction.

[0011] A third aspect of the present invention is the absorbent article according to the first or second aspect, wherein the average bending stiffness of the anti-wrinkle sheet is 0.3 gf cm 2 / cm or more, 1.0gf·cm 2 / cm or less.

[0012] A fourth aspect of the present invention is the absorbent article according to the first or second aspect, wherein the fastening part is a hook tape or an adhesive layer formed by applying an adhesive. [Effects of the Invention]

[0013] According to the present disclosure, it is possible to provide an absorbent article that is easy to use, with fastening parts that are less likely to twist and have good wearability. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the skin side. [Figure 2] FIG. 2 is a plan view of the absorbent article of FIG. 1, viewed from the non-skin side. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] FIG. 4 is a perspective view of the non-skin side of the absorbent article, illustrating the relationship between the anti-wrinkle sheet and the fastening part. [Figure 5] FIG. 10 is a perspective view of the non-skin side of the absorbent article, illustrating a modified example of the anti-wrinkle sheet. [Figure 6] 6A and 6B are cross-sectional views taken along the line VI-VI in FIG. 5, in which (a) shows the state in which the wrinkle prevention sheet is laminated on the back sheet, and (b) shows the state in which the wrinkle prevention sheet is continuously extended from the back sheet. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an absorbent article according to one embodiment of the present invention will be described with reference to the drawings.

[0016] In this specification, "wearing an absorbent article" refers to a state in which the absorbent article is attached to the body, regardless of whether the absorbent article is worn before, during, or after absorbing bodily fluids. Furthermore, "left-right direction" refers to the left-right direction as seen from a wearer facing forward. Furthermore, "longitudinal direction" refers to the longitudinal direction of the absorbent article, a direction that runs along the front and back of the wearer when worn, and is the direction indicated by arrow X in the drawings. Furthermore, the inner side in the longitudinal direction refers to the direction toward the center in the longitudinal direction, and the outer side in the longitudinal direction refers to the direction away from the center in the longitudinal direction. Furthermore, "width direction" refers to the direction intersecting (orthogonal to) the longitudinal direction, a direction that runs along the left and right sides of the wearer when worn, and is the direction indicated by arrow Y in the drawings. Furthermore, the inner side in the width direction refers to the direction toward the center in the width direction, and the outer side in the width direction refers to the direction away from the center in the width direction. Furthermore, "thickness direction" refers to the direction in which each component is layered, and is the direction intersecting (orthogonal to) both the longitudinal direction and the width direction, and is the direction along arrow Z in the figure. Furthermore, "skin side" refers to the direction in the thickness direction that faces the body of the wearer when the absorbent article is worn, and "non-skin side" refers to the direction in the thickness direction opposite to the skin side. Furthermore, body fluids refer to liquids excreted from the body to the outside, such as urine, blood, and water in loose stools.

[0017] (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 plan view of the absorbent article of FIG. 1, as viewed from the non-skin side. FIG. 3 is a cross-sectional view taken along the arrows III-III in FIG. 1. FIG. 4 is a perspective view of the non-skin side of the absorbent article, illustrating the relationship between the wrinkle prevention sheet and the fastening part. FIG. 5 is a perspective view of the non-skin side of the absorbent article, illustrating a modified wrinkle prevention sheet. FIG. 6 is a cross-sectional view taken along the arrows VI-VI in FIG. 5, where (a) shows a state in which the wrinkle prevention sheet is laminated on the back sheet, and (b) shows a state in which the wrinkle prevention sheet extends continuously from the back sheet. Note that FIG. 3 illustrates a schematic cross section of the absorbent article. In addition, in FIGS. 4 and 5, the wrinkle prevention sheet is hatched for ease of understanding.

[0018] The absorbent article 10 according to this embodiment can be used as a variety of absorbent articles for both adults and children, and representative examples include pad-type absorbent articles such as light incontinence pads, urine absorption pads, sanitary napkins, etc. Although a rectangular absorbent article 10 is shown in Figures 1 and 2, the shape of the absorbent article 10 is not limited to this, and the shape of the absorbent article 10 may be an oval shape, an hourglass shape, or the like.

[0019] As shown in Figures 1 to 3, 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, fastening parts 14 provided on the non-skin side of the absorbent article 10, and a wrinkle prevention sheet 15 that prevents wrinkles. In addition to these, the absorbent article 10 of this embodiment also comprises left and right three-dimensional gathers 16. The absorbent article 10 may also be provided with a carrier sheet that wraps the absorbent body 13, a transfer sheet that is disposed between the top sheet 11 and the absorbent body 13, etc.

[0020] (Top sheet) The top sheet 11 is a liquid-permeable sheet-like substrate that allows bodily fluids to pass quickly toward the absorbent body 13 and diffuse the bodily fluids in the plane direction of the absorbent body 13. The top sheet 11 is a sheet that is positioned on the skin side when worn and is arranged opposite the back sheet 12 with the absorbent body 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 come into direct contact with the wearer's skin. Examples of the substrate include hydrophilic sheets, composite nonwoven fabrics that are laminates of the same or different hydrophilic sheets, apertured films such as apertured polyethylene films, and foamed films such as polyethylene foam and urethane foam. Examples of hydrophilic sheets include air-through nonwoven fabrics, thermal-bonded nonwoven fabrics, spunlace nonwoven fabrics, and spunbonded nonwoven fabrics made from one or more of synthetic fibers made from synthetic resins such as polypropylene, polyethylene, and polyester, regenerated fibers such as rayon, and natural fibers such as cotton.

[0021] In order to reduce irritation to the skin, the top sheet 11 may contain lotion, antioxidant, anti-inflammatory component, pH adjuster, antibacterial agent, moisturizer, etc. The shape of the top sheet 11 is not particularly limited, and it may be of any shape as long as it has a size required to guide bodily fluids to the absorbent body 13 without leakage and covers part or all of the absorbent body 13.

[0022] (back seat) The backsheet 12 is a sheet positioned away from the skin when worn. The backsheet 12 may be formed using a liquid-impermeable substrate that prevents body fluids held by the absorbent body 13 from wetting the wearer's clothing. Examples of such substrates include resin films and composite sheets that are laminates of resin films and nonwoven fabrics. The nonwoven fabrics used in the composite sheets may be produced by any method, and examples include single-layer nonwoven fabrics such as spunbonded nonwoven fabrics and meltblown nonwoven fabrics, composite nonwoven fabrics such as spunbonded nonwoven fabric / meltblown nonwoven fabric laminates and spunbonded nonwoven fabric / meltblown nonwoven fabric / spunbonded nonwoven fabric laminates, and composite materials thereof. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, and composite films of polyethylene and polypropylene.

[0023] It is preferable that the back sheet 12 be breathable to prevent stuffiness during wear. To provide breathability to the back sheet 12, for example, a filler may be blended into the resin film substrate or the back sheet 12 may be embossed. An example of the filler is calcium carbonate, and the blending method may be any known method without limitation.

[0024] (absorbent) The absorbent body 13 is a member capable of absorbing and retaining mainly bodily fluids, and includes a bodily fluid absorbing material, preferably including absorbent fibers as a base material and a bodily fluid absorbing material retained in the absorbent fibers. The shape of the absorbent body 13 is not particularly limited, and examples thereof include a rectangular, oval, hourglass, etc.

[0025] (absorbent fiber) The absorbent fiber used as the base material of the absorber 13 is not particularly limited as long as it is one generally used in absorbent articles such as sanitary napkins, disposable diapers, and urine absorption pads, and may be formed from materials such as fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic nonwoven fabric, etc. Examples of fluff pulp include wood pulp, synthetic fiber, polymer fiber, non-wood pulp, recycled pulp, etc., which have been defibrated into a cotton-like state.

[0026] (body fluid absorbing material) The body fluid absorbing material of the absorber 13 is not particularly limited as long as it absorbs and retains body fluids, and examples thereof include super absorbent polymers (SAPs). Examples of SAPs include polyacrylates, polyaspartates, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers, and saponified products thereof. Among these, from the viewpoint of absorption per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. SAPs can be used alone or in combination of two or more.

[0027] SAP is used in the form of particles, fibers, etc., for example, but is preferably used in the form of particles from the viewpoint of ease of handling, etc. In this case, by avoiding the use of SAP in the form of a fine powder that has poor fluidity as a powder and using SAP with a medium particle size, it is possible to improve basic absorption performance and reduce the rough feel that occurs when the absorbent body 13 hardens.

[0028] The absorbent fibers and SAP in the absorbent body 13 may be in the form of a mixture of absorbent fibers and SAP particles, or may be an SAP sheet with SAP particles fixed between absorbent fibers. Another form of absorbent body 13 is an absorbent sheet containing multiple hydrophilic nonwoven fabrics and SAP fixed between the hydrophilic nonwoven fabrics.

[0029] (3D gathers) As shown in Figures 1 and 3, the left and right three-dimensional gathers 16 are members for preventing leakage of bodily fluids outward in the width direction, and are arranged to extend longitudinally on both sides of the skin-facing side of the top sheet 11 in the width direction. The left and right three-dimensional gathers 16 have water-repellent and / or waterproof gathered sheets 16a, and are able to stand up from their base ends supported by the top sheet 11 toward their tip (free end) ends. It is preferable to provide elastic stretch members 16b, such as rubber thread, along the longitudinal direction at the tip ends of the left and right three-dimensional gathers 16. The provision of the elastic stretch members 16b makes it easier for the three-dimensional gathers 16 to stand up.

[0030] (Gathered sheet) The gathered sheet 16a is a water-repellent and / or waterproof sheet, and is made of, for example, a nonwoven fabric. The nonwoven fabric for the gathered sheet 16a can be any water-repellent and / or waterproof (liquid-impermeable) nonwoven fabric made of hydrophobic fibers, and examples thereof include spunbond nonwoven fabric, meltblown nonwoven fabric, and composite nonwoven fabric (SMS nonwoven fabric) which is a spunbond nonwoven fabric / meltblown nonwoven fabric / spunbond nonwoven fabric laminate.

[0031] (Elastic elastic member) The elastic stretchable member 16b is disposed along the longitudinal direction near the tip of the gathered sheet 16a, imparting standing ability to the tip side and enabling the tip of the gathered sheet 16a and its neighboring area to deform to fit the wearer's body shape. The elastic stretchable member 16b may be made of, for example, natural rubber, synthetic rubber, polyurethane, or the like, in the form of a thread, string, or band.

[0032] (Fastening part) As shown in FIGS. 2 to 4, the fastening parts 14 are provided on the non-skin side of the absorbent article 10 in order to attach the non-skin side of the absorbent article 10 to the skin side of the wearer's underwear or the like. In this embodiment, the fastening parts 14 are provided on both longitudinal ends of the non-skin side of the absorbent article 10. The fastening parts 14 are not particularly limited as long as they can be fastened to the wearer's underwear or the like. For example, the fastening parts 14 are preferably hook tape or an adhesive layer formed by applying an adhesive. Hook tape is a strip-shaped tape having multiple hooks (not shown), which is detachable from nonwoven fabric or the like, and is sometimes called "mechanical hook tape" or "mechanical tape." When the fastening parts 14 are an adhesive layer, a known material (such as a hot melt adhesive) can be used as the adhesive that forms the adhesive layer.

[0033] (Anti-wrinkle sheet) 3 and 4, the anti-wrinkle sheet 15 is a sheet with higher rigidity than the back sheet 12, and is arranged on at least one of the skin side of the fastening part 14 and the periphery of the fastening part 14 (only the skin side of the fastening part 14 in Figs. 3 and 4) to prevent wrinkling. The material of the anti-wrinkle sheet 15 is not particularly limited as long as it is a sheet with higher rigidity than the back sheet 12. For example, the anti-wrinkle sheet 15 may be a polypropylene sheet, a polyvinyl chloride sheet, a high-density polyethylene sheet, or an ABS (Acrylonitrile Butadiene Styrene) resin sheet.

[0034] Figures 3 and 4 show a state in which a wrinkle prevention sheet 15 having approximately the same shape as the fastening portion 14 is laminated and fixed to the non-skin side of the back sheet 12, and the fastening portion 14 is provided on the non-skin side of the wrinkle prevention sheet 15, but this is not limited to this.

[0035] For example, as shown in Fig. 5, the wrinkle prevention sheet 15 may be provided around the fastening part 14. In this case, the wrinkle prevention sheet 15 may also be provided on the skin side of the fastening part 14 (the part covered by the fastening part 14 in Fig. 5), or may not be provided. Furthermore, as shown in Fig. 6(a), the wrinkle prevention sheet 15 may be provided by being laminated on the non-skin side of the back sheet 12, or as shown in Fig. 6(b), the wrinkle prevention sheet 15 may be provided so as to extend continuously from the back sheet 12. Note that Fig. 6 shows the back sheet 12, the wrinkle prevention sheet 15, and the fastening part 14, but does not show other members (such as the absorbent body 13 and the top sheet 11).

[0036] (non-placement area) As shown in FIG. 2, the non-skin side of the absorbent article 10 preferably has a non-positioning region 17 where the anti-wrinkle sheet 15 is not placed. The non-positioning region 17 is a region extending from the longitudinal center of the absorbent article 10 (the position indicated by the dashed-dotted line 18 in the figure) to both sides in the longitudinal direction. The length L2 of the non-positioning region 17 from the longitudinal center of the absorbent article 10 (the position indicated by the dashed-dotted line 18 in the figure) to one side in the longitudinal direction and the length L3 of the non-positioning region 17 to the other side in the longitudinal direction each are at least 30% of the longitudinal length L1 of the absorbent article 10, which is 100%. In other words, it is preferable that the anti-wrinkle sheet 15 is not placed in a range (non-positioning region 17) of 30% of the longitudinal length of the absorbent article 10 from the longitudinal center of the absorbent article 10 (the position indicated by the dashed-dotted line 18) to both sides in the longitudinal direction. If the wrinkle prevention sheet 15 is disposed in an area that is less than 30% from the center in the longitudinal direction of the absorbent article 10, it may impair wearability and may make the absorbent article more susceptible to leakage.

[0037] (average bending stiffness) The average bending stiffness of the anti-wrinkle sheet 15 is 0.3 gf cm 2 / cm or more, 1.0gf·cm 2 / cm or less. The average bending stiffness of the anti-wrinkle sheet is preferably 0.3 gf cm 2 / cm, the sheet may easily become twisted. On the other hand, if the average bending stiffness of the twist-prevention sheet is set to 1.0 gf cm 2 If the average bending stiffness is larger than 1 / cm, the wearability may decrease and the ability to conform to the body may decrease, making leakage more likely. The average bending stiffness of the wrinkle prevention sheet 15 can be adjusted by appropriately changing the material of the wrinkle prevention sheet 15, etc.

[0038] The average bending rigidity of the anti-wrinkle sheet 15 is measured using a pure bending friction tester (product name: KES-FB2-S, manufactured by Kato Tech Co., Ltd.) by attaching a 100 mm x 100 mm sample to the device with a clamp spacing of 10 mm and at a curvature increase rate of 5 mm / sec.

[0039] The absorbent article 10 configured as described above includes a twist prevention sheet 15 that has higher rigidity than the back sheet 12 and is disposed on at least one of the skin side of the fastening part 14 and the periphery of the fastening part 14 to prevent twisting. This ensures rigidity in the vicinity of the fastening part 14, making it difficult for the fastening part 14 to twist when worn.

[0040] Furthermore, since the anti-wrinkle sheet 15, which is more rigid than the back sheet 12, is disposed on at least one of the skin side of the fastening part 14 and the periphery of the fastening part 14, there is no need to dispose the anti-wrinkle sheet 15 in an area separated from the fastening part 14. This makes it possible to prevent the anti-wrinkle sheet 15 from reducing the wearability of the absorbent article 10, and ensures good wearability of the absorbent article 10.

[0041] As described above, according to this embodiment, it is possible to provide an absorbent article 10 that is easy to use, with fastening parts that are less likely to twist and have good wearability.

[0042] Although the present invention has been described above based on the above embodiment, the present invention is not limited to the content 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, operational techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Example]

[0043] More preferred examples of this embodiment will be described below with reference to examples and comparative examples, but the present invention is not limited to the following examples in any way.

[0044] (Examples 1 to 4 and Comparative Examples 1 to 3) Under the conditions shown in Table 1, absorbent articles of Examples 1 to 4 and Comparative Examples 1 to 3 were produced.

[0045] In these absorbent articles, the total length (maximum length in the longitudinal direction; the same applies below) of the product was standardized to 420 mm, and the total width (maximum length in the width direction; the same applies below) of the product was standardized to 120 mm. In addition, the absorbent body was composed of fluff pulp as an absorbent fiber and SAP (sodium polyacrylate) as a body fluid absorbing material, and the total length of the absorbent body was set to 350 mm, the total width of the absorbent body to 100 mm, and the basis weight of the SAP to 290 g / m 2 The basis weight of the fluff pulp is 430 g / m 2 The mass of SAP was standardized to 10 g and the mass of fluff pulp to 15 g.

[0046] The wrinkle-preventing sheet was made of polypropylene and had a total length of 30 mm and a total width of 80 mm. Such a wrinkle-preventing sheet was laminated and fixed to the widthwise center of the non-skin side of the back sheet at both longitudinal end portions of the absorbent article. The fastening part was made of a polypropylene hook sheet (hook tape) and had a total length of 15 mm and a total width of 60 mm. Such a fastening part was laminated and fixed to the widthwise center of the non-skin side of the wrinkle-preventing sheet at both longitudinal end portions of the absorbent article. That is, in Examples 1 to 4 and Comparative Examples 1 to 3, the wrinkle-preventing sheet was larger than the fastening part and was arranged on both the skin side of the fastening part and around the fastening part. Note that the "position (distance from the longitudinal end portion of the product)" shown in the table indicates the distance from the longitudinal end of the product to the wrinkle-preventing sheet or the fastening part.

[0047] Each absorbent article was then evaluated based on the following three items ("comfort when absorbing body fluids," "comfort when worn," and "resistance to slippage and creases").

[0048] (Comfort when absorbing body fluids) The "comfort when absorbing bodily fluids" was evaluated by a sensory test conducted by 20 test subjects, who wore each absorbent article with 300 mL of 0.9% aqueous sodium chloride solution absorbed in the absorbent body, walked for 30 minutes, and sat for 30 minutes, and rated the comfort on a three-point scale: 0 (uncomfortable), 1 (slightly bothersome), and 2 (comfortable). The total score for each absorbent article was then calculated and evaluated according to the following criteria. ◎: Total points are 30 or more ○: Total points are between 10 and 30 points △: Total points are less than 10 points

[0049] (Good fit) The evaluation of "good wearing comfort (= less discomfort when wearing)" was a sensory evaluation by 20 monitors, who wore and used each absorbent article and rated it as either "good wearing comfort" or "bad wearing comfort." Then, depending on the number of monitors who rated it as "good wearing comfort," the evaluation was made according to the following criteria. ◎: More than 15 monitors felt that the fit was good. ○: 8 to 14 monitors felt that the fit was good. △: Fewer than 8 monitors felt that the fit was good

[0050] (Less likely to shift or twist) The evaluation of "resistance to slipping and creasing" was a sensory evaluation by 20 monitors who wore and used each absorbent article and rated it as either "resistance to slipping and creasing" or "easy to slipping and creasing." Depending on the number of monitors who rated it as "resistance to slipping and creasing," the product was then rated according to the following criteria. ◎: 15 or more testers felt that it was "less likely to slip or twist." ○: 8 to 14 testers felt that it was "less likely to slip or wrinkle." △: Less than 8 people felt that it was "less likely to slip or twist"

[0051] The results obtained are shown in Table 1.

[0052] [Table 1]

[0053] As shown in Table 1, it was confirmed that Examples 1 to 4 could provide absorbent articles that are easy to use and have fastening parts that are less likely to twist and have good wearability. [Explanation of symbols]

[0054] 10: Absorbent articles 11: Top sheet 12: Back seat 13: Absorbent 14: Fastening part 15: Anti-wrinkle sheet

Claims

1. An absorbent article comprising a liquid-permeable top sheet on the skin side, a liquid-impermeable back sheet on the non-skin side, and an absorbent body disposed between the top sheet and the back sheet, a fastening part provided on the non-skin side of the absorbent article; a twist prevention sheet that has higher rigidity than the back sheet and is disposed on at least one of the skin side of the fastening part and the periphery of the fastening part to prevent twisting. An absorbent article characterized by:

2. The anti-wrinkle sheet is not disposed within a range of 30% of the longitudinal length of the absorbent article from the longitudinal center of the absorbent article to both sides of the longitudinal direction.

2. The absorbent article according to claim 1.

3. The average bending rigidity of the anti-wrinkle sheet is 0.3 gf cm ２ / cm or more, 1.0gf・cm ２ / cm or less 3. The absorbent article according to claim 1 or claim 2.

4. The fastening portion is a hook tape or an adhesive layer formed by applying an adhesive.

3. The absorbent article according to claim 1 or claim 2.

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