absorbent articles

Abstract

To provide an absorbent article with an improved wearing feeling.SOLUTION: An absorbent article having a length along a longitudinal direction and a length along a width direction orthogonal to the longitudinal direction includes: an absorber; a water-permeable skin surface side sheet disposed on a skin surface side of the absorber; and a non-permeable non-skin surface side sheet disposed on a non-skin surface side of the absorber. The skin surface side sheet and the non-skin surface side sheet are longer in the width direction than the absorber, and extends outside a width direction end part of the absorber. The skin surface side sheet is longer in the width direction than the non-skin surface side sheet, and extends outside a width direction end part of the non-skin surface side sheet.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] BACKGROUND ART Absorbent articles that absorb excreted fluids such as urine excreted by a wearer have been known in the past. For example, Patent Document 1 discloses an absorbent pad. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2016 / 114209 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to provide an absorbent article with improved wearing comfort. [Means for solving the problem]

[0005] An absorbent article according to one aspect of the present disclosure is an absorbent article having a length along a longitudinal direction and a length along a width direction perpendicular to the longitudinal direction, and comprising an absorbent body, a water-permeable skin-facing sheet arranged on the skin-facing side of the absorbent body, and a water-impermeable non-skin-facing sheet arranged on the non-skin-facing side of the absorbent body, wherein the skin-facing sheet and the non-skin-facing sheet are longer in the width direction than the absorbent body and extend outward beyond the widthwise ends of the absorbent body, and the skin-facing sheet is longer in the width direction than the non-skin-facing sheet and extends outward beyond the widthwise ends of the non-skin-facing sheet. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to improve the wearing comfort of absorbent articles. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a plan view of an absorbent pad according to an embodiment, viewed from the skin side. [Figure 2] FIG. 2 is an exploded perspective view of the absorbent pad according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view of the absorbent pad according to the embodiment, cut along the width direction. [Figure 4] FIG. 4 is a diagram showing a state in which the absorbent pad according to the embodiment is suspended. [Figure 5] FIG. 5 is a cross-sectional view of the absorbent pad according to the embodiment, cut along the width direction. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

[0009] <Embodiment> In this embodiment, the longitudinal direction of a replaceable (disposable) absorbent pad (an example of the "absorbent article" in this application) is the direction connecting the front body portion, which is placed opposite the wearer's abdomen, and the back body portion, which is placed opposite the wearer's back. Between (at the center in the longitudinal direction) the front body portion (one side in the longitudinal direction) and the back body portion (the other side in the longitudinal direction), a crotch portion, which is placed between the wearer's legs (placed opposite the crotch), is located in a connected manner. In addition, when the absorbent pad is worn by the wearer, In the state where the garment is worn (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inside when worn) is the skin-facing side, and the side opposite the skin-facing side (the outside when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. In addition, the view from the thickness direction is referred to as the planar view.

[0010] FIG. 1 is a plan view of an absorbent pad according to an embodiment, viewed from the skin-facing side. The absorbent pad 1 has a crotch region 1B, which corresponds to the crotch area covering the wearer's genitals when worn; a front body region 1F, which is located on the abdominal side of the crotch region 1B and corresponds to the wearer's front body and waist; and a back body region 1R, which is located on the back side of the crotch region 1B and corresponds to the wearer's back body and waist. An absorbent body 6, which has a rectangular planar shape, is incorporated into the front body region 1F, back body region 1R, and crotch region 1B, with the crotch region 1B at the center. The absorbent pad 1 according to this embodiment has a symmetrical shape and configuration in the longitudinal direction, with the front body region 1F and the back body region 1R having the same shape and configuration. The absorbent pad 1 is used by placing it on the skin-facing side of a tape-type diaper or pants-type diaper. Since the absorbent pad 1 absorbs and retains excreted liquids such as urine excreted by the wearer, only the absorbent pad 1 needs to be replaced and the diaper itself can be reused. The absorbent pad 1 may be placed on the skin-facing side of underwear and used alone without being used in combination with a diaper. In this embodiment, an absorbent pad for adults (for nursing care) will be described.

[0011] The absorbent pad 1 also includes elastic bodies 2L, 2R (an example of the "contraction member" referred to in this application) extending in the longitudinal direction and arranged on both sides in the width direction. The contraction force of the elastic bodies 2L, 2R forms leg gathers in the absorbent pad 1 that fit along the wearer's thighs. As the leg gathers fit along the wearer's thighs, liquid discharged from the wearer is absorbed into the absorbent body of the absorbent pad 1 with almost no leakage from the absorbent pad 1. Note that the elastic members constituting the elastic bodies 2L, 2R can be appropriately selected from rubber threads, band-shaped rubber, etc. Furthermore, the elastic bodies 2L, 2R may be multiple parallel rubber threads. In this embodiment, the elastic bodies 2L, 2R are each composed of two rubber threads.

[0012] FIG. 2 is an exploded perspective view of an absorbent pad according to an embodiment. The absorbent pad 1 comprises a top sheet 7 (an example of the "skin-facing sheet" referred to herein), a back sheet 5 (an example of the "non-skin-facing sheet" referred to herein), an absorbent body 6 disposed between the top sheet 7 and the back sheet 5, and elastic bodies 2L and 2R disposed between the top sheet 7 and the back sheet 5 and on the widthwise outer sides of the absorbent body 6. The absorbent pad 1 has a layered structure in which the top sheet 7, the absorbent body 6, and the back sheet 5 are laminated in this order from the skin-facing side. The top sheet 7, the absorbent body 6, and the back sheet 5 are all rectangular, and their longitudinal directions coincide with the longitudinal direction of the absorbent pad 1. The absorbent body 6 is not present at the front end, the back end, and the widthwise end of the absorbent pad 1, and the top sheet 7 and the back sheet 5 are bonded together. In this manner, in the absorbent pad 1, the top sheet 7 and the back sheet 5 are bonded together outside the area where the absorbent body 6 is located, and the absorbent body 6 is surrounded by this bonded area. The absorbent body 6 may have a gourd-shaped planar shape. The top sheet 7 and the back sheet 5 are bonded together with a hot melt adhesive.

[0013] The top sheet 7 is placed on the wearer's skin side so as to cover the water-absorbing surface of the absorbent body 6. The top sheet 7 is made of a spunbond nonwoven fabric containing thermoplastic resin fibers, an air-through nonwoven fabric, or the like. This top sheet 7 is water-permeable (liquid-permeable) in part or in whole. Therefore, when the absorbent pad 1 is worn, liquid excreted from the wearer passes through the top sheet 7, which may come into contact with the wearer's skin, into the absorbent body 6, and is absorbed therein. The top sheet 7 may also be hydrophilic.

[0014] The absorbent body 6 has an absorbent core that absorbs liquid and a core wrap sheet that wraps around the absorbent core. The absorbent core is formed of staple fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or staple fibers of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. A liquid-permeable nonwoven fabric is used for the core wrap sheet. In this embodiment, tissue is used for the core wrap sheet. Details of the absorbent body 6 will be described later.

[0015] The back sheet 5 is a sheet made of a liquid-impermeable thermoplastic resin material to prevent leakage of exudates. The back sheet 5 is preferably made of a moisture-permeable material to prevent stuffiness when worn.

[0016] The back sheet 5, absorbent body 6, and top sheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the absorbent pad 1 covers the wearer's genitals, both longitudinal ends of the back sheet 5, absorbent body 6, and top sheet 7 are located on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6 from the wearer's ventral to dorsal sides. Therefore, whether the wearer is lying supine or prone, excreted fluid will enter the absorbent body 6 through the top sheet 7.

[0017] FIG. 3 is a cross-sectional view of an absorbent pad according to an embodiment, taken along the width direction. Specifically, FIG. 3 is a cross-sectional view taken along line AA in FIG. 1. The absorbent body 6 of the absorbent pad 1 according to this embodiment includes an absorbent core 6C and a core wrap sheet 6W enveloping the absorbent core 6C. The absorbent core 6C is formed by stacking multiple absorbent mats. Specifically, the absorbent core 6C includes an upper-layer absorbent mat 6A provided on the wearer's skin-facing side and a lower-layer absorbent mat 6B provided on the non-skin-facing side. The absorbent core 6C also includes SAP layers 8L and 8R between the upper-layer absorbent mat 6A and the lower-layer absorbent mat 6B. The SAP layers 8L and 8R are formed by a collection of multiple particles of SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water. The SAP layers 8L and 8R are located outside the center of the absorbent body 6 in the width direction and extend along the longitudinal direction of the absorbent body 6. The SAP layers 8L and 8R are arranged symmetrically with each other in the width direction. The top sheet 7 extends on the non-skin-facing side, that is, on the back sheet 5 side, and is adhered to the back sheet 5.

[0018] In this embodiment, SAP particles refer to granulated resin compositions containing SAP. The term "SAP-containing resin compositions" as used herein encompasses both compositions consisting solely of SAP and compositions containing SAP as the primary component, with other substances added to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives (such as surface modifiers added to hydrophobize particle surfaces) and unreacted monomers remaining during the synthesis of SAP. SAP particles may be disposed between the short fibers of the upper and lower absorbent mats 6A, 6B.

[0019] The core wrap sheet 6W is a thin, liquid-permeable sheet. By wrapping the absorbent core 6C with the core wrap sheet 6W, SAP particles in the SAP layers 8L and 8R are prevented from spilling outside the absorbent body 6. Furthermore, wrapping the absorbent core 6C with the core wrap sheet 6W prevents the absorbent core 6C from losing its shape. The core wrap sheet 6W can be formed from a nonwoven fabric or pulp fiber, and tissue paper is an example of pulp fiber. The absorbent body 6 is wrapped in a back sheet 5 and a top sheet 7, and these sheets also help prevent the absorbent core 6 from losing its shape. Therefore, the core wrap sheet 6W may be omitted. In the configuration shown in Figure 3, the core wrap sheet 6W is composed of two sheets: an upper-layer core wrap sheet 6WA that covers the top sheet 7 side of the absorbent core 6C, which is the skin-facing side; and a lower-layer core wrap sheet 6WB that covers the back sheet 5 side of the absorbent core 6C, which is the non-skin-facing side, and the side surfaces of the absorbent core 6C. The upper core wrap sheet 6WA and the lower core wrap sheet 6WB are The upper core wrap sheet 6WA is laminated on the skin-facing side of the absorbent core 6C at both widthwise ends thereof and bonded to each other. Therefore, the skin-facing side of the absorbent body 6 is made up of the upper core wrap sheet 6WA, and the side and non-skin-facing sides of the absorbent body 6 are made up of the lower core wrap sheet 6WB.

[0020] As mentioned above, absorbent pads are generally used in combination with diapers. Pant-type diapers and tape-type diapers are fastened around the wearer's waist. However, since the absorbent pad is placed on the skin-facing side of the diaper but is not directly fastened to the wearer, there is a risk of the absorbent pad shifting position within the diaper. The absorbent pad 1 according to this embodiment aims to improve the fastening force to the diaper with which it is used in combination. This improvement in fastening force does not require the use of double-sided tape or the like. The absorbent pad 1 according to this embodiment can improve the fastening force to the diaper without using double-sided tape or the like, i.e., while reducing the amount of material used. Therefore, the absorbent pad 1 according to this embodiment can prevent the absorbent pad from shifting position relative to the diaper, thereby improving wearing comfort.

[0021] In the absorbent pad 1 according to this embodiment, as shown in FIGS. 1 and 3, the top sheet 7 and the back sheet 5 are longer in the width direction than the absorbent body 6 and extend outward beyond the widthwise ends of the absorbent body 6. Here, the top sheet 7 is longer in the width direction than the back sheet 5 and extends outward beyond the widthwise ends of the back sheet 5. Therefore, the top sheet 7 is located at the outermost position in the absorbent pad 1 in the width direction and comes into contact with materials such as a diaper that is used in combination with it. The top sheet 7 becomes wet with urine excreted by the wearer and adheres closely to materials such as a diaper. The diaper 1 according to this embodiment can also prevent slippage due to the adhesive force of the top sheet 7.

[0022] Furthermore, diapers are changed less frequently than absorbent pads 1, and a new absorbent pad 1 may be placed in the diaper while the top sheet of the diaper is still wet. In this case, the portion of the top sheet 7 of the absorbent pad 1 that extends outward in the width direction comes into contact with the top sheet of the diaper and becomes wet. When the top sheet 7 becomes wet, it adheres closely to the top sheet of the diaper, thereby preventing the absorbent pad 1 from shifting out of position.

[0023] Furthermore, in the absorbent pad 1 according to this embodiment, the skin-facing side of the top sheet 7 does not have a water-impermeable, leak-proof sheet that forms three-dimensional gathers, and the top sheet 7 is positioned closest to the wearer across the entire width. Typically, the absorbent pad 1 is positioned between a pair of three-dimensional gathers of the diaper it is used in combination with. Since the absorbent pad 1 does not have a leak-proof sheet, the top sheet 7 comes into contact with the three-dimensional gathers of the diaper. In this state, liquid excreted by the wearer spreads across the entire width of the top sheet 7, resulting in moisture being present between the top sheet 7 and the three-dimensional gathers of the diaper. Surface tension between the two forces the top sheet 7 and the three-dimensional gathers of the diaper to adhere closely, thereby preventing the absorbent pad 1 from shifting out of position. It is also possible that excreted liquid leaks from the absorbent pad 1 and penetrates between the diaper and the back sheet 5. The presence of moisture between the back sheet 5 and the diaper top sheet forces the back sheet 5 and the diaper top sheet to adhere closely to each other due to surface tension, preventing the absorbent pad 1 from shifting out of position.

[0024] The elastic bodies 2L, 2R are arranged outside the widthwise ends of the absorbent body 6 and on both sides of the widthwise ends, between the top sheet 7 and the back sheet 5. Figure 4 shows the absorbent pad 1 according to this embodiment in a state where it is hung from above by clamping its longitudinal ends (for example, the ends on the front body region side). The absorbent pad 1 contracts in the longitudinal direction due to the contraction force of the elastic bodies 2L, 2R (see Figures 1 to 3), and bulges and bends towards the back sheet 5. When used in combination with a diaper, the absorbent pad 1 is in roughly the same state as shown in Figure 4. The elastic bodies 2L, 2R are adhered in a stretched state to the back sheet 5, and the elastic bodies 2L, 2R are attached to the back sheet 5. The sheet 5 is shrunk in the longitudinal direction.

[0025] As shown in Fig. 4, the absorbent pad 1 according to this embodiment has widthwise end portions that rise up toward the wearer from the back sheet 5. The absorbent pad according to this embodiment does not have three-dimensional gathers, but because the non-permeable back sheet 5 rises up toward the wearer, leakage of liquid from the outside in the widthwise direction can be suppressed.

[0026] The backsheet 5 also rises toward the wearer, starting from the widthwise end of the absorbent body 6. Here, as shown in FIG. 3 , the region F surrounded by the dotted line in the figure, which is near the widthwise end of the absorbent body 6, becomes a recess that is recessed relative to the upper surface (skin side) of the topsheet 7 when the backsheet 5 rises, and functions as a groove for draining excreted liquids such as urine. This groove extends along the longitudinal direction of the absorbent pad 1. For example, most of the urine that reaches the widthwise end of the absorbent body 6 flows longitudinally along the groove without leaking from the widthwise end, and is absorbed by the absorbent body 6 while flowing. Therefore, although the absorbent pad 1 according to this embodiment does not have three-dimensional gathers, it can reduce the amount of liquid leaking in the widthwise direction, so-called side leakage.

[0027] Furthermore, as shown in Figure 4, the elastic bodies 2L and 2R cause the back sheet 5 to contract, thereby forming multiple first pleats 10 whose main component is in the width direction of the absorbent pad 1 and multiple second pleats 11 whose main component is in the longitudinal direction of the absorbent pad 1.

[0028] In FIG. 4, six first pleats 10 are illustrated by way of example and are assigned reference numerals, but the number of first pleats is not limited to six. A plurality of first pleats are formed on the widthwise end sides of the absorbent pad 1. In addition, in FIG. 4, four second pleats 11 are illustrated by way of example and are assigned reference numerals, but the number of second pleats is not limited to four. A plurality of second pleats are formed on the longitudinal end sides of the absorbent pad 1. Note that the first pleats 10 extend in a diagonal direction and may include a longitudinal component of the absorbent pad 1, but the widthwise component of the absorbent pad 1 is larger than the longitudinal component of the absorbent pad 1. Similarly, the second pleats 11 extend in a diagonal direction and may include a widthwise component of the absorbent pad 1, but the longitudinal component of the absorbent pad 1 is larger than the widthwise component of the absorbent pad 1.

[0029] The absorbent pad 1 prevents displacement within the diaper by sandwiching diaper materials (e.g., the diaper top sheet) between the first pleats 10 and the second pleats 11. The absorbent pad 1 according to this embodiment forms a plurality of first pleats 10 and second pleats 11 during use, so that any of the pleats can sandwich the diaper materials even when used with various types of diapers. Therefore, the absorbent pad 1 can be suitably combined with various diapers.

[0030] 4, the absorbent pad 1 includes a combination of a plurality of first pleats 10 in which the spacing between the plurality of first pleats 10 is different from one another (for example, a combination of first pleats 10A and a combination of first pleats 10B), and a combination of a plurality of second pleats 11 in which the spacing between the plurality of second pleats 11 is different from one another (for example, a combination of second pleats 11A and a combination of second pleats 11B). This increases the likelihood that the absorbent pad 1 will sandwich diaper materials between pleats in any of the combinations of first pleats 10A, first pleats 10B, second pleats 11A, and second pleats 11B. Therefore, the absorbent pad 1 can be suitably combined with a variety of diapers. 4 is one example. The absorbent pad 1 can be suitably combined with various diapers by having multiple combinations of the first pleats 10A, the first pleats 10B, the second pleats 11A, and the second pleats 11B.

[0031] As shown in FIG. 4, the absorbent pad 1 has a plurality of first pleats 10 adjacent to each other. The absorbent pad 1 includes a combination of a plurality of first pleats 10 (for example, a combination of first pleats 10C), and a combination of a plurality of second pleats 11 in which a plurality of second pleats 11 are adjacent to each other (for example, a combination of second pleats 11C). This allows the absorbent pad 1 to more firmly sandwich the diaper materials with the combination of first pleats 10C or the combination of second pleats 11C. Therefore, the absorbent pad 1 can prevent misalignment. Note that the combination of first pleats 10C and second pleats 11C shown in FIG. 4 is one example. By having a plurality of combinations of first pleats 10 and second pleats 11, the absorbent pad 1 can be suitably combined with a variety of diapers.

[0032] Here, the static friction coefficient (static friction coefficient) of the back sheet 5 in this embodiment will be described. The static friction coefficient of the absorbent pad 1 can be measured by the following method. The static friction coefficient was measured using a surface property measuring instrument (Tribogear Type: 14DR) manufactured by Shinto Scientific Co., Ltd., in accordance with JIS P 8147:2010 (Paper and cardboard - Method for measuring static and dynamic friction coefficients). The back sheet 5 The static friction coefficient of the back sheet 5 was 0.63 or less. The static friction coefficient of the back sheet 5 is preferably 0.50 or more, but may be less than 0.50. The back sheet 5 is made of a polyethylene film.

[0033] Generally, absorbent pads with an outer surface made of a slippery material require adhesive bonding to the diaper or holder pants to prevent displacement within the diaper or holder pants used in combination, or require lamination of a nonwoven fabric to increase the static friction coefficient. In commercially available absorbent pads, a cover sheet made of nonwoven fabric often forms the outer surface. In contrast, the absorbent pad 1 of this embodiment does not include a cover sheet, and the back sheet 5 forms the outer surface. The back sheet 5 is made of a liquid-impermeable sheet material (e.g., a film). Such a back sheet 5 has a lower static friction coefficient than a nonwoven fabric cover sheet and is more slippery than a cover sheet. However, the absorbent pad 1 of this embodiment can prevent displacement within the diaper used in combination by using the first pleats 10 and the second pleats 11.

[0034] Here, the contraction regions of the elastics 2L, 2R are contained between both longitudinal ends of the absorbent body 6. The elastics 2L, 2R are adhered to the back sheet 5, and the contraction regions of the elastics 2L, 2R are determined by the ends of the elastics 2L, 2R that are adhered to the back sheet 5 in the contraction direction. In FIG. 1, the adhered ends 2E are the portions of the elastics 2L, 2R that are enclosed by the ellipses indicated by dotted lines. As shown in FIG. 1, in this embodiment, the elastics 2L, 2R themselves are contained between both longitudinal ends of the absorbent body 6, and the adhered ends 2E are also contained between both longitudinal ends of the absorbent body 6. Note that the elastics 2L, 2R themselves may protrude from between both longitudinal ends of the absorbent body 6. Note that the elastics 2L, 2R are also adhered to the top sheet 7.

[0035] The contraction regions of the elastic bodies 2L, 2R are located between the longitudinal ends of the absorbent body 6, so that the backsheet 5 does not rise toward the wearer outside the longitudinal ends of the absorbent body 6. This allows the topsheet 7 to contact the wearer's skin while remaining substantially flush with the absorbent body 6. When the topsheet 7 becomes wet, it adheres closely to the diaper materials. This prevents the absorbent pad 1 from shifting position.

[0036] Furthermore, since a relatively large amount of urine is absorbed in the absorbent core 6 in the area closer to the urethral opening, a relatively small amount of urine reaches a position farther from the wearer's urethral opening. Outside the longitudinal ends of the absorbent core 6, which are positions farther from the urethral opening, the top sheet 7 becomes wet with a small amount of urine and adheres to the diaper materials. Furthermore, in the area closer to the urethral opening, the back sheet 5 rises toward the wearer, thereby preventing side leakage of liquid.

[0037] As shown in Fig. 1, the absorbent body 6 has high-rigidity portions 6H that are provided at both longitudinal and widthwise ends and have higher rigidity than other portions. The opposite ends refer to the four corners of the rectangular absorbent body 6. The rigidity of these four corners is higher than that of other parts of the absorbent body.

[0038] Fig. 5 is a cross-sectional view of an absorbent pad according to an embodiment, cut along the width direction. Specifically, Fig. 5 is a cross-sectional view cut along line BB in Fig. 1. As shown in Fig. 5, the high-rigidity portion 6H has a greater number of stacked core wrap sheets 6W in the thickness direction than other portions. Specifically, an upper-layer core wrap sheet 6WA and a lower-layer core wrap sheet 6WB are stacked on the skin-facing side of the absorbent body 6, and are bonded together with a large amount of hot-melt adhesive. Note that the absorbent body 6 is pressed during the bonding process of the upper-layer core wrap sheet 6WA and the lower-layer core wrap sheet 6WB. The high-rigidity portion 6H is formed by bonding the upper-layer core wrap sheet 6WA and the lower-layer core wrap sheet 6WB, which are stacked in the thickness direction, to each other. Note that the high-rigidity portion 6H may also be formed by stacking multiple core wrap sheets.

[0039] The effect of providing the high stiffness portion 6H will be explained with reference to Figure 4. The high stiffness portion 6H has such rigidity that it does not contract due to the contraction force of the elastic bodies 2L, 2R, or contracts only slightly compared to other portions of the absorbent body 6, the top sheet 7, and the back sheet 5. Because the high stiffness portion 6H does not contract due to the contraction force of the elastic bodies 2L, 2R, or contracts only slightly, third pleats 12 are formed on the exterior surface side near the high stiffness portion 6H. The third pleats 12 are formed between the high stiffness portion 6H and the elastic bodies 2L, 2R. Because the high stiffness portion 6H does not contract, the third pleats 12 are pleats that include a component in the contraction direction of the elastic bodies 2L, 2R, i.e., the longitudinal direction of the absorbent pad 1. The third pleats 1 2 are pleats that extend diagonally and may include a widthwise component of the absorbent pad 1, but whose longitudinal component of the absorbent pad 1 is greater than its widthwise component. The absorbent pad 1 according to this embodiment forms multiple third pleats 12 during use, so that any of the pleats can sandwich the diaper materials even when used with various types of diapers. The third pleats 12 are formed near the high-rigidity portions 6H at the four corners of the absorbent body 6. Therefore, the absorbent pad 1 can be suitably combined with various diapers.

[0040] 1, the distance D1 between the elastic bodies 2L, 2R and the widthwise end of the absorbent body 6 is shorter than the distance D2 between the adhesive end 2E (an example of the "end of the stretchable region" in this application) of the elastic bodies 2L, 2R and the longitudinal end of the absorbent body 6. This allows the formation of third pleats 12 in which the longitudinal component of the absorbent pad 1 is greater than the widthwise component of the absorbent pad 1, as shown in FIG.

[0041] As shown in FIGS. 2 and 3, the absorbent body 6 is laminated on the skin-facing side of the backsheet 5, and the backsheet 5 and the absorbent body 6 are bonded together. Here, as shown in FIG. 4, the backsheet 5 is bonded to the high-rigidity sections 6H of the absorbent body 6, resulting in the formation of diagonal wrinkles 13 in the areas of the backsheet 5 that overlap with the high-rigidity sections 6H. The diagonal direction has components in both the longitudinal and transverse directions of the absorbent pad 1. The wrinkles 13 are more likely to form at the boundaries between the high-rigidity sections 6H and other sections of the absorbent body 6. Because the high-rigidity sections 6H do not shrink, they can maintain their planar shape and face the diaper in a generally parallel state. However, the wrinkles 13 enable the absorbent pad 1 to engage with the diaper materials on the non-skin-facing side (exterior side) of the high-rigidity sections 6H. This prevents the absorbent pad 1 from shifting position within the diaper.

[0042] Although the present embodiment has been described above, the present invention is not limited to the above embodiment. In the absorbent pad 1 according to the above embodiment, the sheet forming the exterior surface is the back sheet 5, but this is not limited to this. In the absorbent pad 1, the sheet forming the exterior surface may be a cover sheet made of nonwoven fabric.

[0043] The features included in each of the embodiments and modifications thereof disclosed above can be combined with each other. [Explanation of symbols]

[0044] 1. Absorbent pad 1B...Inseam area 1F: Front body area 1R: Back body area 2L, 2R... Elastic body 2E·Adhesive end 5. Back seat 6. Absorber 6C··Absorbent Core 6A··Upper layer absorbent mat 6B Lower layer absorbent mat 6W Core Wrap Sheet 6WA··Upper layer core wrap sheet 6WB··Lower layer core wrap sheet 6H·High rigidity part 7. Top sheet 8L,8R··SAP layer 10. First fold 11. Second fold 12. Third fold 13...Wrinkles

Claims

1. An absorbent article having a length along a longitudinal direction and a length along a width direction perpendicular to the longitudinal direction, An absorber; a water-permeable skin-facing sheet disposed on the skin-facing side of the absorbent body; a non-skin-facing sheet having water impermeability and arranged on the non-skin-facing side of the absorbent body; Equipped with the skin-facing side sheet and the non-skin-facing side sheet are longer in the width direction than the absorbent body and extend outward beyond the width direction ends of the absorbent body, the skin-facing side sheet is longer in the width direction than the non-skin-facing side sheet and extends outward beyond the widthwise end of the non-skin-facing side sheet, the absorbent article includes a contraction member that is adhered to the non-skin-facing side sheet in a stretched state and that contracts at least the non-skin-facing side sheet in the longitudinal direction; the contractile members are disposed between the skin-facing side sheet and the non-skin-facing side sheet, on the outer sides of the widthwise ends of the absorbent body and on both sides of the widthwise ends, the absorbent body has a high-rigidity portion that is provided at the longitudinal end and the widthwise end and has higher rigidity than other portions, the high-rigidity portion has such rigidity that it does not contract or only slightly contracts due to the contraction member; By bonding the non-skin-facing side sheet and the high-rigidity portion of the absorbent body, diagonal wrinkles having components in both the longitudinal direction and the width direction are formed in the area of ​​the non-skin-facing side sheet that overlaps the high-rigidity portion. Absorbent articles.

2. The contraction region of the contraction member is located between both ends of the absorbent body in the longitudinal direction. The absorbent article of claim 1.

3. The absorbent body has an absorbent core that absorbs liquid and a core wrap sheet that covers the absorbent core, The high rigidity portion is formed by stacking the core wrap sheets in a thickness direction. More than the parts of The absorbent article of claim 1.

4. The high-rigidity portion is formed by bonding the core wrap sheets stacked in the thickness direction to each other. The absorbent article of claim 3.

5. a distance between the contraction member and the end of the absorbent body in the width direction is shorter than a distance between an end of the stretchable region of the contraction member and an end of the absorbent body in the longitudinal direction; The absorbent article of claim 1.

6. a non-permeable leak-proof sheet that forms three-dimensional gathers is not provided on the skin-facing side of the skin-facing sheet; The skin-facing sheet is disposed closest to the wearer across the entire width direction. The absorbent article according to claim 1 or 2.

7. the non-skin-facing side sheet is a film having a static friction coefficient of 0.50 or more and 0.63 or less; The absorbent article according to any one of claims 1 to 5.

Images