JP7736726B2 - absorbent articles - Google Patents

Description

This disclosure relates to absorbent articles.

Some commercially available absorbent products, such as pads for disposable pants, are equipped with fastening materials such as hook-and-loop fasteners or adhesives to prevent them from shifting or becoming distorted during use.

For example, Patent Document 1 discloses an absorbent article constructed by sandwiching an absorbent body between a liquid-impermeable back sheet and a liquid-permeable top sheet. The liquid-impermeable back sheet of this absorbent article has a predetermined pattern of adhesive slip-prevention means formed with a hot-melt adhesive.

Patent Document 2 also discloses an absorbent article in which an absorbent element is sandwiched between a bodily fluid-permeable top sheet and a bodily fluid-impermeable back sheet. The front and back end surfaces of this absorbent article have exposed adhesive sections made of a hot melt adhesive or pressure-sensitive adhesive that adheres to human skin.

Japanese Patent Application Laid-Open No. 2003-10245 Patent No. 4084009

Absorbent articles such as disposable pants pads are prone to shifting and wrinkling over time. When these shifts and wrinkling occur, the absorbent article is unable to absorb body waste effectively, and the waste ends up being caught directly in the disposable pants, causing discomfort and requiring the disposable pants to be replaced, which can be cost-effective.

The absorbent article described in Patent Document 1 has a liquid-impermeable back sheet (back sheet) equipped with anti-slip means that can be attached to disposable pants or underwear used in combination, but if the disposable pants or underwear shifts, the absorbent article will also shift.

Furthermore, the absorbent article described in Patent Document 2 has an adhesive part that adheres to the skin on the surface of the absorbent article that is used, but if the adhesive part continues to come into contact with the skin, it may impede breathability and cause skin rashes and roughness.

The present disclosure therefore aims to provide an absorbent article that can prevent slippage and skin irritation.

In order to solve the above problems, a first aspect of the present invention is an absorbent article that can be worn on a wearer's clothing and used, comprising a liquid-permeable top sheet that is positioned on the skin side when worn, a liquid-impermeable back sheet that is positioned on the non-skin side, and an absorbent body that is placed between the top sheet and the back sheet, and the article also comprises an anti-slip sheet that includes an adhesive material that is provided on the non-skin side of the absorbent article and that can be attached to the skin side of the clothing, a breathable sheet-like substrate that is fixed to the skin side of the absorbent article, and a silicone rubber anti-slip material that is provided on the skin side of the substrate and can prevent slipping against the wearer's skin, and the anti-slip sheet is provided on at least one of first regions on both sides of the absorbent article in the longitudinal direction and second regions on both sides of the absorbent article in the width direction of the absorbent article, on the skin side of the absorbent article.

A second aspect of the present invention is an absorbent article according to the first aspect, wherein the base material of the slip-preventing sheet has a gap on the skin-facing side where the anti-slip material is not disposed.

A third aspect of the present invention is an absorbent article according to the first or second aspect, wherein the first region is a region located at both longitudinal end portions of the absorbent body, and the second region is a region located outboard of the absorbent body in the width direction.

A fourth aspect of the present invention is an absorbent article according to the third aspect, wherein the first region is a region located within a range of 20 mm to 60 mm from both ends of the absorbent body in the longitudinal direction, and the length in the width direction of the anti-slip sheet provided in the first region is 50% to 70% of the total length in the width direction of the absorbent article.

A fifth aspect of the present invention is an absorbent article according to the first or second aspect, wherein the second regions are regions spaced apart on both sides of a center line in the longitudinal direction of the absorbent article, and the distance from the center line to the anti-slip sheets in the second regions on both sides in the longitudinal direction is 10% to 20% of the total length of the absorbent article in the longitudinal direction.

A sixth aspect of the present invention is an absorbent article according to the first or second aspect, wherein the total area of the anti-slip sheets is 10% or more and 30% or less of the area of the skin-side surface of the absorbent article.

A seventh aspect of the present invention is an absorbent article according to the second aspect, wherein the area of the voids provided in the anti-slip sheet is 50% or more and 80% or less of the area of the anti-slip sheet.

The eighth aspect of the present invention is an absorbent article according to the second aspect, wherein the anti-slip material of the anti-slip sheet is provided in parallel on the skin-facing side of the substrate, and the length of the anti-slip material is 50% or less of the length of the long side of the anti-slip sheet.

A ninth aspect of the present invention is an absorbent article according to the second aspect, wherein the anti-slip material of the anti-slip sheet is provided in parallel on the skin-facing side of the substrate, and the width of the anti-slip material is 30% or less of the length of the short side of the anti-slip sheet.

A tenth aspect of the present invention is an absorbent article according to the first or second aspect, wherein the substrate of the slip-prevention sheet is a breathable film or nonwoven fabric, and the basis weight of the substrate is 20 gsm or more and 32 gsm or less.

This disclosure makes it possible to prevent slippage and skin irritation.

1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the skin side. FIG. 2 is a plan view of the absorbent article of FIG. 1 from the non-skin side. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1. FIG. 2 is an enlarged explanatory diagram of a portion IV in FIG. 1 . FIG. 2 is an explanatory diagram showing the absorbent article when worn.

Below, we will explain an absorbent article according to one embodiment of the present invention, with reference to the drawings.

In this specification, "wearing an absorbent article" refers to the state in which the absorbent article is worn on the body, regardless of whether the absorbent article absorbs bodily fluids before, during, or after absorption. The "longitudinal direction" of each component of the absorbent article refers to the longitudinal direction of the absorbent article (the direction running from front to back when worn by the wearer), which is the direction indicated by arrow X in the figure. The "width direction" of each component of the absorbent article refers to the shorter direction perpendicular to the longitudinal direction (the direction running from left to right when worn by the wearer), which is the direction indicated by arrow Y in the figure. The "thickness direction" of each component of the absorbent article refers to the direction in which the components are stacked, which is the direction indicated by arrow Z in the figure. The "skin side" of each component of the absorbent article refers to the direction facing the wearer's body when the absorbent article is worn, and the "non-skin side" refers to the opposite direction in the thickness direction. Body fluids refer to liquids excreted from the body to the outside, such as urine, blood, and water in loose stools. Examples of absorbent articles include absorbent napkins, light incontinence pads, urine absorption pads and other light incontinence products, sanitary napkins and other sanitary products, panty liners, etc., but are not limited to these and other absorbent articles may also be used.

Figure 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the skin side. Figure 2 is a plan view of the absorbent article of Figure 1, viewed from the non-skin side. Figure 3 is a cross-sectional view taken along the arrows III-III in Figure 1. Figure 4 is an explanatory diagram showing an enlargement of part IV in Figure 1. Figure 5 is an explanatory diagram showing the absorbent article being worn. Note that these figures do not stipulate the relative sizes of the components of the absorbent article, and the dimensions of each component can be selected appropriately from a wide range depending on the intended use of the absorbent article, etc.

[Absorbent article]
1 to 3, an absorbent article 10 according to one embodiment of the present invention is a pad-type absorbent article 10 that can be worn on a wearer's underwear, disposable diaper, or other garment A (see FIG. 5). The absorbent article 10 comprises a liquid-permeable top sheet 11 that faces the wearer's skin when worn, a liquid-impermeable back sheet 12 that faces away from the wearer's skin when worn, an absorbent body 13 disposed between the top sheet 11 and the back sheet 12, an adhesive layer (fastening material) 14 provided on the non-skin side (non-skin-facing surface) 10a of the absorbent article 10, and a slip-prevention sheet 15 fixed to the skin side (skin-facing surface) 10b of the absorbent article 10. The absorbent article 10 of this embodiment also comprises three-dimensional gathers 16 in addition to the top sheet 11, back sheet 12, absorbent body 13, adhesive layer 14, and slip-prevention sheet 15. The absorbent article 10 may include sheets other than the top sheet 11, the back sheet 12, the slippage prevention sheet 15, and the three-dimensional gathers 16 (for example, a cover sheet that wraps the absorbent body 13). The shape of the absorbent article 10 is not particularly limited, but is preferably a substantially rectangular or oval shape. The absorbent article 10 of this embodiment has a substantially rectangular shape.

The longitudinal length (maximum length; the same applies below) L1 of the absorbent article 10 is preferably at least 140 mm and not more than 300 mm. The widthwise length L2 of the absorbent article 10 is preferably at least 50 mm and not more than 100 mm. By adjusting the dimensions of the absorbent article 10 to fall within the above ranges, a pad-type absorbent article 10 suitable for light incontinence products, sanitary products such as sanitary napkins, panty liners, etc. can be obtained.

(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 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 substrates include nonwoven fabrics such as air-through nonwoven fabrics, thermal-bonded nonwoven fabrics, and spun-bonded nonwoven fabrics, open-pore films such as open-pore polyethylene films, foamed films such as polyethylene foams and urethane foams, and multilayer sheets made by laminating two or more of these.

The surface of the top sheet 11 may be embossed or perforated to improve liquid permeability. Any known method can be used for embossing or perforating the top sheet 11 without limitation. Furthermore, to reduce irritation to the skin, the top sheet 11 may contain lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizers, etc.

(back seat)
The backsheet 12 may be formed using a liquid-impermeable substrate that prevents the body fluids retained 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 sheet may be manufactured by any method, including 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, as well as composite materials thereof. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, and composite films of polyethylene and polypropylene. To prevent stuffiness during wear, the backsheet 12 is preferably breathable. To achieve breathability, the backsheet 12 may be imparted with a filler by blending a filler into the resin film substrate or by embossing the backsheet 12. The filler may be calcium carbonate, and the method for blending it may be any known method without any restrictions.

(Absorbent)
Examples of the absorbent body 13 include a fluff absorbent body containing absorbent fibers and superabsorbent polymer (hereinafter sometimes referred to as "SAP"), and an SAP sheet in which SAP particles are fixed between liquid-absorbent sheets.

Absorbent fibers are not particularly limited as long as they are commonly used in absorbent articles such as sanitary napkins, disposable diapers, and urine absorption pads. Examples include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic nonwoven fabric. Examples of fluff pulp include wood pulp (e.g., bleached coniferous kraft pulp (N-BKP) such as southern pine or Douglas fir), synthetic fiber, resin fiber, and non-wood pulp that have been defibrated into a cotton-like state. Furthermore, examples of liquid-absorbent sheets include sheets composed of one or more of the above absorbent fibers.

There are no particular restrictions on the superabsorbent polymer, so long as it can absorb body fluids and prevent backflow, and examples include polyacrylates, polyaspartates, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers, and saponified versions thereof. Of these, from the standpoint of absorption per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. Superabsorbent polymers can be used alone or in combination of two or more.

In the absorbent body 13, the absorbent fibers and SAP may be in the form of a mixture of SAP particles in the absorbent fibers, or SAP particles may be fixed between the absorbent fibers.

(Cover sheet)
A cover sheet (not shown) may be provided to encase the absorbent body 13 in order to prevent leakage of SAP particles and stabilize the shape of the absorbent body 13. The base material of the cover sheet may be any hydrophilic material, such as tissue, absorbent paper, airlaid nonwoven fabric, or spunbond nonwoven fabric. Among these, spunbond nonwoven fabric is preferred. Furthermore, when multiple cover sheets are provided, the base materials of the multiple cover sheets may be the same or different. Furthermore, an ADL layer may be provided between the top sheet 11 and the cover sheet to quickly capture and distribute body fluids from the cover sheet side to the absorbent body 13 side.

(3D gathers)
Left and right three-dimensional gathers 16 may be provided on the skin side 10b of the absorbent article 10 to prevent side leakage of bodily fluids excreted by the wearer. In this case, the three-dimensional gathers 16 are provided at both widthwise ends of the skin side 11a of the top sheet 11 so as to extend along the longitudinal direction of the absorbent article 10. The three-dimensional gathers 16 include a water-repellent and/or waterproof gathered sheet 16a and an elastic stretchable member 16b.

The gathered sheet 16a is a water-repellent and/or waterproof (liquid-impermeable) sheet, and is made of, for example, a nonwoven fabric. Any water-repellent and/or waterproof nonwoven fabric made of hydrophobic fibers can be used as the nonwoven fabric, and examples include spunbonded nonwoven fabric, meltblown nonwoven fabric, and composite nonwoven fabrics (SMS nonwoven fabrics) that are spunbonded nonwoven fabric/meltblown nonwoven fabric/spunbonded nonwoven fabric laminates. For example, one widthwise end (fixed end) of the gathered sheet 16a is fixed to the backsheet 12 near both widthwise ends of the skin-side surface 11a, a widthwise middle portion is fixed to the topsheet 11 near both widthwise ends of the skin-side surface 11a, and the other widthwise end is a free end that can stand upright. The fixed position of the gathered sheet is not limited to this embodiment; for example, one widthwise end (fixed end) may be fixed to the topsheet 11 near both widthwise ends of the skin-side surface 11a.

The elastic stretch member 16b is arranged along the longitudinal direction near the free end (other end) of the gathered sheet 16a, imparting standing ability to the free end and allowing the free end of the gathered sheet 16a and the surrounding area to deform to fit the wearer's body shape. The elastic stretch member 16b can be, for example, a thread-, string-, or strip-shaped member made of natural rubber, synthetic rubber, polyurethane, or the like.

(Fixing material)
As shown in FIGS. 2 and 3 , the non-skin side 10a of the absorbent article 10 (in this embodiment, the non-skin side 12a of the backsheet 12) is provided with an adhesive layer (fastening material) 14 for attaching the absorbent article 10 to the skin side A1 of a garment A (such as underwear or a disposable diaper). That is, the adhesive layer 14 is provided on the non-skin side 10a of the absorbent article 10 so that it can be attached to the skin side A1 of the garment A. The adhesive used to form the adhesive layer 14 is not particularly limited, and examples include hot-melt adhesives such as polyacrylic acid ester, vinyl acetate-ethylene copolymer, vinyl acetate-acrylic copolymer, polymethyl methacrylate, polystyrene, styrene-acrylic copolymer, polyester resin, epoxy resin, and butadiene-styrene copolymer. These may be used alone or in a blend of two or more. The adhesive layer 14 can be formed by applying the above-mentioned adhesive to the non-skin side 10a of the absorbent article 10. When the absorbent article 10 is used, the absorbent article 10 is attached to the skin side A1 of the garment A via the adhesive layer 14 (see FIG. 5 ). A removable sheet (such as release paper) may be attached to the adhesive layer 14 of the absorbent article 10 before use to protect the adhesive layer 14. Note that the fastening material is not limited to the adhesive layer 14 formed by applying an adhesive to the non-skin side 10a of the absorbent article 10, and may be, for example, double-sided tape or hook-and-loop fastener attached to the non-skin side 10a of the absorbent article 10 (such as the non-skin side 12a of the backsheet 12).

(Slip prevention sheet)
1, 3, and 4, a plurality of anti-slip sheets 15 are provided on the skin side 10b of the absorbent article 10 to prevent the absorbent article 10 from slipping against the wearer's skin (sometimes referred to as "body") B. Each of the plurality of anti-slip sheets 15 includes a breathable sheet-like substrate 17 fixed to the skin side 10b of the absorbent article 10, and an anti-slip material 18 made of silicone rubber provided on the skin side of the substrate 17 to prevent slipping against the wearer's skin B. The anti-slip sheets 15 are provided on the skin side 10b of the absorbent article 10 to prevent slipping against the wearer's skin B, and have the function of preventing slippage of the absorbent article 10 against the skin B.

(Base material)
The substrate 17 is a breathable sheet-like substrate and is fixed to the skin side 10b of the absorbent article 10. For example, the substrate 17 is adhesively fixed to the skin side 10b of the absorbent article 10 using an adhesive such as a hot melt. The substrate 17 is preferably a breathable film or nonwoven fabric. To prevent stuffiness and skin irritation, examples of the film include a PE-based porous film with a moisture permeability of 6000 (g/ ^m² ·24h) or more, or a plastic film with equivalent breathability. Examples of the nonwoven fabric include a spunbond nonwoven fabric, a meltblown nonwoven fabric, and a composite nonwoven fabric (SMS nonwoven fabric) that is a spunbond nonwoven fabric/meltblown nonwoven fabric/spunbond nonwoven fabric laminate. The basis weight of the substrate 17 is preferably 20 gsm or more at the lower limit and 32 gsm or less at the upper limit. If the basis weight of the substrate 17 is less than 20 gsm, it becomes too thin and it is difficult to ensure the adhesion of the anti-slip material 18, which will be described later. Also, if the basis weight of the substrate 17 is 32 gsm or more, the breathability deteriorates, which is not preferable from the viewpoint of preventing stuffiness and skin rash.

(anti-slip material)
The non-slip material 18 is made of silicone rubber that is non-slip against the skin B, and has the function of preventing the absorbent article 10 from slipping against the skin B. In other words, the non-slip material 18 does not need to have enough adhesive strength to adhere (fasten) the absorbent article 10 to the skin B, but only needs to have enough adhesive strength to prevent the absorbent article 10 from slipping against the skin B. Because the non-slip material 18 is made of silicone rubber, it has excellent gas permeability and water vapor permeability and is less likely to become stuffy.

The anti-slip sheets 15 are provided on the skin-side surface 10b of the absorbent article 10 in at least one of the first regions 19 on both longitudinal sides of the absorbent article 10 and the second regions 20 on both widthwise sides of the absorbent article 10. That is, at least two anti-slip sheets 15 are provided. In this embodiment, anti-slip sheets 15 are provided in both the first region 19 and the second region 20. Specifically, the multiple anti-slip sheets 15 in this embodiment include a pair of front and rear anti-slip sheets 15a, 15b provided in the first region 19, and two pairs of left and right anti-slip sheets 15c to 15f provided in the second region 20 (see Figure 1). It is preferable that the anti-slip sheets 15a, 15b provided in the first region 19 be longer in the widthwise direction of the absorbent article 10 than in the longitudinal direction. Furthermore, it is preferable that the slip prevention sheets 15c to 15f provided in the second region 20 are longer in the longitudinal direction than in the width direction of the absorbent article 10. In this embodiment, the slip prevention sheet 15 is provided in both the first region 19 and the second region 20, but this is not limited to this and it is sufficient that it is provided in at least one of the first region 19 and the second region 20. In this embodiment, the first region 19 is a portion of the skin-side surface 11a of the top sheet 11, and the second region 20 is a portion of the skin-side surface 10b of the gathered sheet 16a, but this is not limited to this and it is sufficient that the first region 19 and the second region 20 are a portion of the skin-side surface 10b of the absorbent article 10.

(First area)
The first regions 19 on both longitudinal sides of the absorbent article 10 are preferably regions that overlap both longitudinal ends of the absorbent body 13 when the absorbent article 10 is viewed from the skin side. In other words, the first regions 19 on both longitudinal sides of the absorbent article 10 are preferably regions located at both longitudinal ends of the absorbent body 13. As a result, when the anti-slip sheet 15 is provided in the first region 19, the front and rear anti-slip sheets 15a, 15b are located at both longitudinal ends of the absorbent body 13, as shown in FIG. 1 . In this way, by setting the first regions 19 in regions located at both longitudinal ends of the absorbent body 13, it is possible to suppress slippage of the absorbent body 13 in a concentrated manner rather than the entire absorbent article 10, and therefore excrement such as bodily fluids can be reliably received by the absorbent body 13.

Furthermore, when the first region 19 is located at both longitudinal ends of the absorbent body 13, it is preferable that the first region 19 be located within a range of 20 mm to 60 mm from both longitudinal ends 13a of the absorbent body 13 inward (toward the center) in the longitudinal direction. If the first region 19 is located less than 20 mm from both longitudinal ends 13a of the absorbent body 13, the operability of providing the anti-slip sheets 15a, 15b in the first region 19 may be reduced, which may result in reduced productivity of the absorbent article 10. Furthermore, if the first region 19 is located more than 60 mm from both longitudinal ends 13a of the absorbent body 13, the anti-slip sheets 15a, 15b in the first region 19 may be located closer to the longitudinal center of the absorbent body 13, which may result in reduced water absorption performance of the absorbent body 13. In other words, by defining the first region 19 as a region within a range of 20 mm to 60 mm from both longitudinal ends 13a of the absorbent body 13, it is possible to prevent a decrease in operability and productivity when providing the anti-slip sheets 15a, 15b in the first region 19, and also ensure the water absorption performance of the absorbent body 13.

When anti-slip sheets 15 are provided in the first region 19, the widthwise length L3 of the anti-slip sheets 15a, 15b is preferably 50% or more and 70% or less of the total widthwise length L2 of the absorbent article 10. By setting the widthwise length L3 of the anti-slip sheets 15a, 15b to 50% or more of the total widthwise length L2 of the absorbent article 10, an anti-slip effect can be achieved. Furthermore, by setting the widthwise length L3 of the anti-slip sheets 15a, 15b to 70% or less of the total widthwise length L2 of the absorbent article 10, a decrease in productivity of the absorbent article 10 can be suppressed, and good productivity can be maintained.

(Second area)
The second regions 20 on both sides in the width direction of the absorbent article 10 are preferably regions located widthwise outward of the absorbent body 13. As a result, when anti-slip sheets 15 are provided in the second regions 20, the left and right anti-slip sheets 15 are located widthwise outward of the absorbent body 13. By setting the second regions 20 on both sides in the width direction of the absorbent article 10 widthwise outward of the absorbent body 13 in this way, it is possible to prevent a decrease in the absorption capacity of the absorbent body 13 due to the anti-slip sheets 15 provided in the second regions 20. Note that the second regions 20 of the absorbent article 10 are not limited to regions located widthwise outward of the absorbent body 13, and may be, for example, regions overlapping the absorbent body 13.

Furthermore, it is preferable that the second regions 20 on both sides of the absorbent article 10 in the width direction are provided spaced apart from each other on both sides of the longitudinal center line CL (shown by the dashed-dotted line CL in Figure 1) of the absorbent article 10. As a result, when anti-slip sheets 15 are provided in the second regions 20, two pairs of anti-slip sheets 15c to 15f are provided on the left and right sides, as shown in Figure 1. In this case, the distance L4 from the center line CL to the anti-slip sheets 15c to 15f of the second regions 20 on both sides in the longitudinal direction is preferably 10% or more and preferably 20% or less of the total longitudinal length L1 of the absorbent article 10. In this way, by spacing the anti-slip sheets 15c to 15f from the center line CL by 10% or more of the total length L1 in the longitudinal direction of the absorbent article 10, it is possible to ensure that the area in the longitudinal central portion, including the center line CL, where the anti-slip sheets 15 are not provided is 20% or more of the total length L1 in the longitudinal direction of the absorbent article 10. This makes it easier for the three-dimensional gathers 16 in the longitudinal central portion of the absorbent article 10 to stand up when the absorbent article 10 receives bodily excrement or other waste, thereby allowing the three-dimensional gathers 16 to function effectively. Furthermore, by spacing the anti-slip sheets 15c to 15f from the center line CL by 20% or less of the total length L1 in the longitudinal direction of the absorbent article 10, it is possible to ensure that the area in the longitudinal central portion of the absorbent article 10 where the anti-slip material 18 is not provided is 40% or less of the total length L1 in the longitudinal direction of the absorbent article 10. This prevents a decrease in the slippage prevention effect of the absorbent article 10 located in the crotch region of the wearer when worn. Note that the second regions 20 of the absorbent article 10 are not limited to two pairs of regions on both sides of the width of the absorbent article 10, but may be one pair of regions on both sides of the width, or three or more pairs of regions on both sides of the width.

(void)
It is preferable to provide a void 21 on the skin-side surface of the substrate 17 of the anti-slip sheet 15, where no anti-slip material 18 is disposed. The area of the void 21 provided on the skin-side surface of the substrate 17 of the anti-slip sheet 15 is preferably 50% or more, and preferably 80% or less, of the area of the anti-slip sheet 15 (the area of the skin-side surface of the substrate 17). Furthermore, the lower limit of the area of the void 21 is more preferably 60% or more of the area of the anti-slip sheet 15, and the upper limit of the area of the void 21 is more preferably 70% or less of the area of the anti-slip sheet 15. If the area of the void 21 is smaller than 50% of the area of the anti-slip sheet 15, the absorbent article 10 will adhere too closely to the skin, increasing the possibility of stuffiness and skin rash. Furthermore, if the area of the void 21 is larger than 80% of the area of the anti-slip sheet 15, the anti-slip effect may not be fully achieved. In other words, by setting the area of the gaps 21 provided in the anti-slip sheet 15 to be between 50% and 80% of the area of the anti-slip sheet 15, it is possible to suppress stuffiness and skin irritation while also achieving a sufficient anti-slip effect.

The shape of the anti-slip material 18 provided on the skin-facing side of the substrate 17 of the anti-slip sheet 15 is not particularly limited. For example, multiple anti-slip materials 18 in wavy, dashed, straight, or dotted shapes may be provided on the skin-facing side of the substrate 17, with gaps 21 formed between them.

For example, as shown in Figures 1 and 4, multiple linear anti-slip materials 18 may be arranged in parallel on the skin-side surface of the substrate 17. That is, multiple anti-slip materials 18 may be arranged in parallel on the skin-side surface of the substrate 17. In this embodiment, the multiple anti-slip materials 18 provided on the anti-slip sheets 15a, 15b in the first region 19 are arranged in parallel in the width direction (Y direction) of the anti-slip sheets 15a, 15b, from one end to the other in the longitudinal direction (X direction) of the anti-slip sheets 15a, 15b, at an angle relative to the longitudinal direction. Furthermore, the multiple anti-slip materials 18 provided on the anti-slip sheets 15c to 15f in the second region 20 are arranged in parallel in the longitudinal direction (X direction) of the anti-slip sheets 15c to 15f, from one end to the other in the width direction (Y direction) of the anti-slip sheets 15c to 15f, at an angle relative to the width direction. The slip-prevention sheets 15a and 15b in the first region 19 are elongated in the width direction of the absorbent article 10, and the slip-prevention sheets 15c to 15f in the second region 20 are elongated in the length direction of the absorbent article 10.

In this case, the length L5 of the multiple anti-slip materials 18 is preferably 50% or less of the length L6 of the anti-slip sheet 15 in the long side direction. If the length L5 of the multiple anti-slip materials 18 is longer than 50% of the length L6 of the anti-slip sheet 15 in the long side direction, the absorbent article 10 may adhere too closely to the skin, potentially causing stuffiness or skin irritation. In other words, by setting the length L5 of the multiple anti-slip materials 18 to 50% or less of the length L6 of the anti-slip sheet 15 in the long side direction, stuffiness and skin irritation can be reduced. Note that the long side direction of the anti-slip sheet 15 is the width direction (Y direction) of the absorbent article 10 for anti-slip sheets 15a and 15b provided in the first region 19, and the length direction (X direction) of the absorbent article 10 for anti-slip sheets 15c to 15f provided in the second region 20 (see Figure 1).

Furthermore, it is preferable that the width L7 of the multiple anti-slip materials 18 be 30% or less of the length L8 of the anti-slip sheet 15 in the short-side direction. If the width L7 of the multiple anti-slip materials 18 is longer than 30% of the length L8 of the anti-slip sheet 15 in the short-side direction, the absorbent article 10 may adhere too closely to the skin, which may cause stuffiness or skin irritation. In other words, by setting the width L7 of the multiple anti-slip materials 18 to 30% or less of the length L8 of the anti-slip sheet 15 in the short-side direction, stuffiness and skin irritation can be reduced. Note that the short-side direction of the anti-slip sheet 15 is the longitudinal direction (X direction) of the absorbent article 10 in the case of anti-slip sheets 15a and 15b provided in the first region 19, and the width direction (Y direction) of the absorbent article 10 in the case of anti-slip sheets 15c to 15f provided in the second region 20.

The total area of the anti-slip sheets 15 (in this embodiment, the total area of the anti-slip sheets 15a to 15f) is preferably at least 10% and preferably no more than 30% of the area of the skin-side surface 10b of the absorbent article 10. By setting the total area of the anti-slip sheets 15 within this range, it is possible to achieve an anti-slip effect while minimizing damage to the skin caused by the anti-slip sheets 15.

(How to use)
Next, an example of how to use the absorbent article 10 will be described. Fig. 5 is an explanatory diagram showing the absorbent article being worn. Fig. 5 is a schematic cross-sectional view of the absorbent article being worn, viewed from the side. Fig. 5 also schematically illustrates clothing A (underwear, disposable diaper, etc.) and a wearer's body B, with the curved lower portion of body B being the crotch area, and the wearer's legs not shown.

As shown in Figure 5, when using the absorbent article 10, the user attaches the adhesive layer (fastening material) 14 on the non-skin side 10a of the absorbent article 10 (in this embodiment, the non-skin side 12a of the back sheet 12) to the skin side A1 of the garment A. When the user puts on the garment A with the absorbent article 10 attached, the anti-slip material 18 of the anti-slip sheet 15 on the skin side 10b of the absorbent article 10 comes into contact with the wearer's skin B. The anti-slip material 18 of the anti-slip sheet 15 in contact with the wearer's skin B has an anti-slip effect on the absorbent article 10 against the wearer's skin B.

The absorbent article 10 configured as described above has an adhesive layer (fastening material) 14 on the non-skin side 10a of the absorbent article 10 that can be attached to the skin side A1 of the clothing A, so that the absorbent article 10 can be attached to the clothing A when in use. Furthermore, the skin side 10b of the absorbent article 10 has an anti-slip sheet 15 that has an anti-slip material 18 that can prevent slipping against the wearer's skin B. Therefore, when the clothing A is worn with the absorbent article 10 attached, the anti-slip material 18 of the anti-slip sheet 15 on the skin side 10b of the absorbent article 10 comes into contact with the wearer's skin B. The anti-slip material 18 prevents the absorbent article 10 from slipping against the wearer's skin B, so that, for example, when the clothing A shifts during prolonged use, the absorbent article 10 can be prevented from shifting against the wearer's skin B.

The anti-slip sheet 15 is provided on at least one of the first regions 19 on both longitudinal sides of the skin-side surface 10b of the absorbent article 10 and the second regions 20 on both widthwise sides. In other words, the anti-slip sheet 15 can be provided symmetrically in the longitudinal or widthwise direction on the skin-side surface 10b of the absorbent article 10, thereby reliably preventing the absorbent article 10 from slipping against the wearer's skin B.

In addition, the base material 17 of the anti-slip sheet 15 is breathable, which helps prevent stuffiness and skin irritation.

Furthermore, the anti-slip material 18 of the anti-slip sheet 15 is made of silicone rubber, which has excellent gas and water vapor permeability, ensuring breathability and preventing stuffiness and skin irritation. Furthermore, since the material prevents the absorbent article 10 from slipping against the skin B and does not adhere (fasten) the absorbent article 10 to the skin B, the anti-slip sheet 15 may come into contact with or separate from the skin B depending on the wearer's movements and posture. In this way, a gap may form between the skin B and the anti-slip sheet 15 depending on the wearer's movements and posture, ensuring breathability and preventing stuffiness and skin irritation.

Therefore, this embodiment can prevent the absorbent article 10 from shifting and causing rough skin.

In addition, by providing gaps 21 on the skin-facing side of the base material 17 of the anti-slip sheet 15 where no anti-slip material 18 is placed, the breathability of the anti-slip sheet 15 can be further improved, reducing stuffiness and skin irritation, and preventing the occurrence of rough skin.

The manner (including shape and dimensions) in which the anti-slip material 18 is provided on the skin-side surface of the substrate 17 of the anti-slip sheet 15 is not limited to the above. For example, in this embodiment, the skin-side surface of the substrate 17 of the anti-slip sheet 15 has a gap 21 where the anti-slip material 18 is not located. However, the anti-slip material 18 may be provided over the entire skin-side surface of the substrate 17 without the gap 21. Even in this case, the substrate 17 is breathable, ensuring breathability and preventing stuffiness and skin irritation. Furthermore, the anti-slip material 18 is made of silicone rubber, which has excellent gas and water vapor permeability and ensures breathability, preventing stuffiness and skin irritation. Furthermore, as described above, depending on the wearer's movement and posture, a gap may appear between the skin B and the anti-slip sheet 15, ensuring breathability and preventing stuffiness and skin irritation.

The present invention has been described above based on the above embodiment, but the present invention is not limited to the content of the above embodiment, and modifications can naturally be made 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 within the scope of the present invention.

10: Absorbent article 10a: Non-skin side of absorbent article 10b: Skin side of absorbent article 11: Top sheet 12: Back sheet 13: Absorbent body 14: Adhesive layer (fastening material)
15: Anti-slip sheet 17: Base material 18: Anti-slip material 19: First region 20: Second region 21: Gap A: Garment A1: Skin side of garment B: Wearer's skin

Claims (7)

An absorbent article that can be worn on a wearer's clothing and used, comprising: a liquid-permeable top sheet that is positioned on the skin side when worn; a liquid-impermeable back sheet that is positioned on the non-skin side; and an absorbent body that is placed between the top sheet and the back sheet,
a fastening material provided on a non-skin side of the absorbent article and attachable to a skin side of the clothing;
a slip prevention sheet including a breathable sheet-like substrate fixed to the skin side of the absorbent article, and a silicone rubber non-slip material provided on the skin side of the substrate to prevent slipping against the wearer's skin,
The slip prevention sheet is provided on the skin side of the absorbent article in at least one of first regions on both sides in the longitudinal direction of the absorbent article and second regions on both sides in the width direction of the absorbent article ,
A gap in which the anti-slip material is not disposed is provided on the skin side of the base material of the anti-slip sheet,
The area of the gap provided in the anti-slip sheet is 50% or more and 80% or less of the area of the anti-slip sheet.
An absorbent article characterized by: the first region is a region located at both ends of the absorbent body in the longitudinal direction,
The absorbent article according to claim 1 , wherein the second region is a region located outward in the width direction from the absorbent body. the first region is a region located within a range of 20 mm to 60 mm from both ends of the absorbent body in the longitudinal direction,
The absorbent article according to claim 2 , wherein the length in the width direction of the anti-slip sheet provided in the first region is 50% to 70% of the entire length in the width direction of the absorbent article. the second region is a region provided on both sides of a center line in the longitudinal direction of the absorbent article, the second region being spaced apart from the center line,
The absorbent article according to claim 1 or claim 2, characterized in that the distance from the center line to the anti-slip sheets in the second regions on both sides of the longitudinal direction is 10% or more and 20% or less of the total length of the absorbent article in the longitudinal direction. The absorbent article according to claim 1 or 2, wherein the total area of the anti-slip sheets is 10% to 30% of the area of the skin-side surface of the absorbent article. The anti-slip material of the anti-slip sheet is provided in parallel on the skin side of the base material,
The absorbent article according to claim 1 , wherein the length of the anti-slip material is 50% or less of the length of the anti-slip sheet in the long side direction. The anti-slip material of the anti-slip sheet is provided in parallel on the skin side of the base material,
The absorbent article according to claim 1 , wherein the width of the anti-slip material is 30% or less of the length of the anti-slip sheet in the short side direction.