Absorbent article

Abstract

To provide a technique capable of improving wearing comfort of an absorbent article.SOLUTION: An absorbent article comprises: an absorber including an absorbent core for absorbing a liquid, and a core wrap sheet for covering at least a part of the absorbent core and including grooves recessed from the skin surface side toward the non-skin surface side; a skin surface-side sheet disposed on the skin surface side of the absorber; and non-adhesive parts not bonded either between the skin surface-side sheet and the core wrap sheet, and between the core wrap sheet and the absorbent core in the grooves.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] 2. Description of the Related Art In absorbent articles for absorbing liquids such as urine and body fluids, it is known to squeeze an absorbent body (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-103782 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is known that in absorbent articles, the absorbent body is compressed to form compressed grooves, which allow liquid to be diffused throughout the absorbent body. However, the compressed parts of the absorbent body become hard, and the direct or indirect contact of these parts with the skin reduces the comfort of wearing the absorbent article.

[0005] Therefore, an object of the present invention is to provide a technique capable of improving the wearing comfort of an absorbent article. [Means for solving the problem]

[0006] An absorbent article according to one aspect of the present invention is an absorbent article comprising an absorbent body having an absorbent core that absorbs liquid, and a core wrap sheet that covers at least a portion of the absorbent core and has a groove portion formed therein that is recessed from the skin side to the non-skin side, a skin side sheet arranged on the skin side of the absorbent body, and a non-adhesive portion in the groove portion that is not adhered either between the skin side sheet and the core wrap sheet or between the core wrap sheet and the absorbent core. Effect of the Invention

[0007] According to the present invention, the wearing comfort of an absorbent article can be improved. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a diaper according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the diaper according to the embodiment. [Diagram 3] FIG. 3 is a plan view of the diaper in a stretched state, as viewed from the skin-facing side. [Figure 4] FIG. 4 is a cross-sectional view of the diaper in the width direction taken along line AA in FIG. [Diagram 5] Fig. 5(A) is a cross-sectional view of the core wrap sheet and the top sheet taken along line BB in Fig. 3. Fig. 5(B) is a cross-sectional view of the core wrap sheet and the top sheet taken along line CC in Fig. 3. [Figure 6] 6(A) to 6(C) are plan views of the core wrap sheet as viewed from the skin side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] 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 merely examples, and the present invention is not limited to the configurations of these embodiments.

[0010] <Embodiment> In this embodiment, the longitudinal direction of a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as a "diaper") is the direction connecting the front body arranged opposite the wearer's abdomen and the rear body arranged opposite the wearer's back. Between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction), a crotch portion arranged under the wearer's crotch (opposed to the crotch). In addition, when the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is the skin-facing side, and the opposite side of the skin-facing side (the outer side 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 the planar view.

[0011] FIG. 1 is a perspective view of a diaper according to the present embodiment. The diaper 1 has a crotch region 1B, which is a region corresponding to the crotch of the wearer covering the pubic area when worn, a front body region 1F, which is located in front of the crotch region 1B and corresponds to the front body of the wearer, and a back body region 1R, which is located behind the crotch region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R that can be attached to a front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on both left and right edges of the back body region 1R. When the tapes 2L and 2R are attached to the front patch 2F with the front body region 1F positioned on the wearer's abdomen and the back body region 1R positioned on the wearer's back, the diaper 1 is fixed to the wearer's body in a state surrounding the wearer's waist circumference and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand and walk while wearing the diaper 1.

[0012] In the diaper 1, an absorbent capable of absorbing and retaining liquid is mainly disposed near the crotch region 1B. In addition, in order to prevent the formation of a gap between the diaper 1 and the wearer's skin that can be a liquid outflow path, the diaper 1 is provided with leg gathers 3AL, 3AR at a portion surrounding the wearer's legs (thighs), and three-dimensional gathers 3BL, 3BR are provided on the inner side of the leg gathers 3AL, 3AR in the width direction of the diaper 1, and a waist gather 3R is provided at a portion surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are in close contact with the wearer's skin by the elastic force of the elastic members. Therefore, liquid discharged from the wearer's private parts is absorbed by the absorbent of the diaper 1 without leaking out of the diaper 1. As the elastic member, a thread-like or strip-like rubber or the like can be appropriately selected.

[0013] FIG. 2 is an exploded perspective view of the diaper 1. The diaper 1 has a cover sheet 4 that forms an outer surface when worn. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with constrictions 4KL, 4KR at the portions corresponding to the long sides, and forms the exterior surface of the diaper 1. The constrictions 4KL, 4KR are provided at the portions where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the back sheet 5 described later and to improve the feel. For example, in order to suppress leakage of excrement, a nonwoven fabric made of a liquid-impermeable thermoplastic resin can be used as the material for the cover sheet 4. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may be a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0014] The diaper 1 comprises a back sheet 5 (an example of the "non-skin-facing sheet" as referred to in the present application), an absorbent body 6, and a top sheet 7 (an example of the "skin-facing sheet" as referred to in the present application), which are laminated in this order on the wearer-facing surface of the cover sheet 4. The top sheet 7 may consist of a single sheet, or multiple sheets may be laminated together. The back sheet 5, absorbent body 6, and top sheet 7 are all sheet-like members having a substantially rectangular appearance, and are laminated in this order on the cover sheet 4 with their longitudinal directions coinciding with the longitudinal direction of the cover sheet 4. The back sheet 5 and the cover sheet 4 are laminated in this order. Similarly, the top sheet 7 is a sheet formed of a liquid-impermeable thermoplastic resin material to suppress leakage of excrement. The back sheet 5 is preferably made of a material that is also moisture permeable to suppress stuffiness when worn. The top sheet 7 is made of an air-through nonwoven fabric formed containing thermoplastic resin fibers and disposed on the wearer's skin side so as to cover the water-absorbing surface of the absorbent 6. The top sheet 7 is liquid permeable in part or in whole. Therefore, when the diaper 1 is worn, liquid excreted from the wearer passes through the top sheet 7 that may come into contact with the wearer's skin and enters the absorbent 6, where it is absorbed. The top sheet 7 may also be hydrophilic. The longitudinal direction of the diaper 1 is the same as the longitudinal directions of the absorbent 6 and the top sheet 7.

[0015] The back sheet 5, absorbent body 6, and top sheet 7 all extend from the front body region 1F to the rear body region 1R. Therefore, when the wearer's private parts are covered with the cover sheet 4 in which the back sheet 5, absorbent body 6, and top sheet 7 are laminated, both ends in the longitudinal direction of the back sheet 5, absorbent body 6, and top sheet 7 are located on the wearer's ventral side and back side. In other words, the wearer's private parts are covered by the absorbent body 6 from the wearer's ventral side to the back side. Therefore, whether the wearer is in a ventral or back-facing position when excreting liquid, the excreted liquid comes into contact with the absorbent body 6 via the top sheet 7.

[0016] The diaper 1 also has elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR described above, which are provided between the cover sheet 4 and the back sheet 5 so as to stretch in the longitudinal direction of the diaper 1. The elastic members 4SL, 4SR are provided in an appropriate number (three in this embodiment) determined according to the elastic force (contractile force) required for the design of the diaper 1.

[0017] The diaper 1 also has long, narrow, strip-like side sheets 8L, 8R. The side sheets 8L, 8R are liquid-impermeable sheets provided on the long sides of the top sheet 7. Like the cover sheet 4, the side sheets 8L, 8R have constrictions 8KL, 8KR at the locations where the wearer's thighs are located. The side sheets 8L, 8R have elastic members 8EL, 8ER arranged along the longitudinal direction for forming three-dimensional gathers 3BL, 3BR. When the diaper 1 is worn, i.e., when the diaper 1 is U-shaped in side view, the side sheets 8L, 8R are pulled in the longitudinal direction by the contractile force of the elastic members 8EL, 8ER and rise from the top sheet 7, forming three-dimensional gathers 3BL, 3BR that prevent liquid from leaking out.

[0018] The cover sheet 4 is provided with elastic members 4C, which prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference, on the inner side in the width direction of the diaper 1 than the elastic members 4SL, 4SR and along the longitudinal direction of the diaper 1. The elastic members 4C are provided according to the elastic force (contractile force) required for the design of the diaper 1.

[0019] Furthermore, the elastic member 9ER for forming the above-mentioned waist gather 3R is provided between the back sheet 5 and the top sheet 7, at a position further back than the end of the absorbent body 6. The elastic member 9ER is provided between the back sheet 5 and the top sheet 7 with its longitudinal direction, which is the stretch direction, oriented in the left-right direction of the diaper 1. Thus, when the tapes 2L, 2R provided on both the left and right sides of the elastic member 9ER are attached to the front patch 2F on the abdominal side of the wearer, the elastic member 9ER exerts a contractile force to bring the diaper 1 into close contact with the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

[0020] Fig. 3 is a plan view of the diaper 1 in an extended state, as viewed from the skin side. Fig. 4 is a widthwise cross-sectional view of the diaper 1 taken along line AA in Fig. 3. Note that the front patch 2F, elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and side sheets 8L, 8R are omitted from Figs. 3 and 4.

[0021] The absorbent body 6 has an absorbent core 6A and a core wrap sheet 6B that covers a part or the whole of the absorbent core 6A. The core wrap sheet 6B is made of tissue paper or liquid-permeable nonwoven fabric. The absorbent core 6A has a structure in which granular absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is held in the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by subjecting synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate to hydrophilic treatment. Therefore, in the absorbent core 6A, the volumetric change of the absorbent resin before and after absorbing liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when the absorbent core 6A is viewed as a whole, it can be said that the expansion rate of the thickness of the absorbent core 6A that absorbs liquid is not as large as the expansion rate of the absorbent resin itself.

[0022] The SAP particles of this embodiment refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein includes both a composition consisting of SAP alone and a composition containing SAP as the main component and containing other substances to the extent that they do not adversely affect the water absorption. Examples of "other substances" include additives (such as surface modifiers added to make the particle surface hydrophobic) and unreacted monomers remaining during the synthesis of SAP.

[0023] The core wrap sheet 6B may be composed of a single sheet. The core wrap sheet 6B may be divided into at least an upper layer core wrap sheet that overlaps the skin-facing side of the absorbent core 6A, and a lower layer core wrap sheet that overlaps the side and non-skin-facing side of the absorbent core 6A. The upper layer core wrap sheet is a sheet that easily allows the liquid that has flowed into the absorbent core 6A to pass through, and a fine air-through nonwoven fabric can be used as an example. The lower layer core wrap sheet can be made of the same material as the upper layer core wrap sheet, or can be made of a different material such as tissue paper that is less permeable to liquid but easily maintains the shape of the absorbent core 6A. The upper layer core wrap sheet and the lower layer core wrap sheet may be bonded to each other.

[0024] The core wrap sheet 6B has a compressed portion (groove portion) 20 recessed from the skin-facing side to the non-skin-facing side. The compressed portion 20 is formed by compressing the absorbent body 6 from the skin-facing side. In the configuration example shown in FIG. 3, the compressed portion 20 is composed of a plurality of grooves having grooves 20A and grooves 20B intersecting each other. In the configuration example shown in FIG. 3, the groove 20A extends from the left front side to the right rear side of the diaper 1, and the groove 20B extends from the right front side to the left rear side of the diaper 1. In the configuration example shown in FIG. 3, the grooves 20A and 20B are formed in a diagonal lattice pattern with respect to the long side or short side of the rectangular absorbent body 6. The extending direction of the grooves 20A and 20B is not limited to the configuration example shown in FIG. 3. For example, the groove 20A may extend from the front to the rear side of the diaper 1, and the groove 20B may extend from the right side to the left side of the diaper 1. The grooves 20A and the grooves 20B may be formed in a lattice pattern parallel to the long or short sides of the absorbent body 6 having a rectangular shape.

[0025] Air flows along the grooves 20A and 20B provided on the skin-facing side of the absorbent body 6, improving the breathability of the diaper 1. Urine excreted by the wearer is dispersed throughout the absorbent body 6 along the grooves 20A and 20B provided on the skin-facing side of the absorbent body 6. This allows the diaper 1 to efficiently absorb urine excreted by the wearer throughout the absorbent body 6. Furthermore, providing the grooves 20A and 20B in the absorbent body 6 makes it easier to bend, improving the comfort of wearing the diaper 1 for the wearer.

[0026] The core wrap sheet 6B and the top sheet 7 may be intermittently bonded together. For example, the core wrap sheet 6B and the top sheet 7 are intermittently bonded together by partially applying an adhesive such as a hot melt to at least one of the core wrap sheet 6B and the top sheet 7. However, Thus, the diaper 1 has a plurality of bonded parts (bonded regions) spaced apart from each other between the core wrap sheet 6B and the top sheet 7, which are bonded to the core wrap sheet 6B and the top sheet 7. The bonded parts are formed by an adhesive that intermittently bonds the core wrap sheet 6B and the top sheet 7. The bonded parts are arranged in a predetermined region including the region in which the compressed parts 20 are formed in the top sheet 7. The bonded parts may be formed linearly, curvedly, or bent. The diaper 1 has a plurality of non-bonded parts (non-bonded regions) spaced apart from each other between the core wrap sheet 6B and the top sheet 7, where the core wrap sheet 6B and the top sheet 7 are not bonded. The non-bonded parts are arranged in a predetermined region including the region in which the compressed parts 20 are formed in the core wrap sheet 6B.

[0027] Also, the absorbent core 6A and the core wrap sheet 6B may be intermittently bonded together. For example, the absorbent core 6A and the core wrap sheet 6B are intermittently bonded together by partially providing an adhesive such as a hot melt on at least one of the absorbent core 6A and the core wrap sheet 6B. Thus, the diaper 1 has a plurality of bonded parts (bonded regions) that are spaced apart from each other between the absorbent core 6A and the core wrap sheet 6B and bonded together. The plurality of bonded parts are formed by an adhesive that bonds the absorbent core 6A and the core wrap sheet 6B intermittently. The plurality of bonded parts are arranged in a predetermined region including a region in the absorber 6 where the compressed parts 20 are formed. The plurality of bonded parts may be formed linearly, curvedly, or bently. The diaper 1 has a plurality of non-bonded parts (non-bonded regions) that are spaced apart from each other between the absorbent core 6A and the core wrap sheet 6B and where the absorbent core 6A and the core wrap sheet 6B are not bonded together. The non-adhesive portions are arranged in predetermined regions including the regions of the absorbent body 6 where the compressed portions 20 are formed.

[0028] FIG. 5(A) is a cross-sectional view of the core wrap sheet 6B and the top sheet 7 when cut along the line BB in FIG. 3. In FIG. 5(A), the groove 20A and its vicinity are enlarged. FIG. 5(B) is a cross-sectional view of the core wrap sheet 6B and the top sheet 7 when cut along the line CC in FIG. 3. In FIG. 5(B), the groove 20B and its vicinity are enlarged. Between the core wrap sheet 6B and the top sheet 7, an adhesive 21 is intermittently provided to bond the core wrap sheet 6B and the top sheet 7. By bonding the core wrap sheet 6B and the top sheet 7, the core wrap sheet 6B and the top sheet 7 are closely attached to each other. By closely attaching the core wrap sheet 6B and the top sheet 7, the shapes of the grooves 20A and 20B provided on the skin-facing side of the absorbent body 6 are transferred to the top sheet 7, and the top sheet 7 is provided with grooves corresponding to the grooves 20A and 20B. Air flows along the grooves provided in the top sheet 7, improving the breathability of the diaper 1. Urine discharged by the wearer is dispersed along the grooves provided in the top sheet 7 to the portion of the top sheet 7 overlapping with the absorbent body 6. This allows the diaper 1 to efficiently absorb urine discharged by the wearer with the entire absorbent body 6. Between the absorbent core 6A and the core wrap sheet 6B, adhesives 21 for bonding the absorbent core 6A and the core wrap sheet 6B may be intermittently provided. That is, between the absorbent core 6A and the core wrap sheet 6B, a plurality of adhesives 21 for bonding the absorbent core 6A and the core wrap sheet 6B may be provided. By bonding the absorbent core 6A and the core wrap sheet 6B, the absorbent core 6A and the core wrap sheet 6B are closely attached to each other.

[0029] The adhesive 21 may have a spiral shape. Fig. 6(A) is a plan view of the core wrap sheet 6B viewed from the skin-facing side. In Fig. 6(A), the spiral-shaped adhesive 21 is formed on the core wrap sheet 6B on the skin-facing side. The core wrap sheet 6B on the skin-facing side is the core wrap sheet 6B between the absorbent core 6A and the top sheet 7. The spiral-shaped adhesive 21 may also be formed between the absorbent core 6A and the core wrap sheet 6B. The spiral-shaped adhesive 21 is formed in a continuous line, and the adhesive 21 extends in a predetermined direction. A part of the compressed portion 20 and a plurality of non-adhesive portions are arranged alternately. The predetermined direction may be the fiber orientation direction of the core wrap sheet 6B, or a direction perpendicular to the fiber orientation direction of the core wrap sheet 6B. The predetermined direction is not limited to these, and may be another direction. When the core wrap sheet 6B is viewed in a plane, the adhesive 21 is formed in a spiral shape, and a part of the compressed portion 20 and a part of the adhesive 21 overlap each other. By applying the adhesive 21 in a spiral shape to the core wrap sheet 6B on the skin side, the compressed portion 20 has an area where the adhesive 21 is applied and an area where the adhesive 21 is not applied. After applying the adhesive 21 to the core wrap sheet 6B on the skin side, the top sheet 7 is placed on the core wrap sheet 6B, so that the core wrap sheet 6B and the top sheet 7 are intermittently bonded to each other. Furthermore, by applying adhesive 21 in a spiral shape to absorbent core 6A or to core wrap sheet 6B on the skin-facing side, regions where adhesive 21 is applied and regions where adhesive 21 is not applied are formed in compressed portion 20. After adhesive 21 is applied to absorbent core 6A or to core wrap sheet 6B on the skin-facing side, core wrap sheet 6B is placed on absorbent core 6A, whereby absorbent core 6A and core wrap sheet 6B are intermittently bonded together.

[0030] The adhesive 21 may have a serpentine shape. The serpentine shape may be a shape in which a plurality of mountain shapes and a plurality of valley shapes are alternately arranged. The serpentine shape may be a shape in which a plurality of arc shapes are arranged, and the orientation of two adjacent arc shapes is different from each other. Figures 6(B) and 6(C) are plan views of the core wrap sheet 6B as viewed from the skin side. In Figures 6(B) and 6(C), the serpentine adhesive 21 is formed on the core wrap sheet 6B on the skin side. The serpentine adhesive 21 is formed in a continuous line shape, and a portion of the adhesive 21 and a plurality of non-adhesive portions are arranged alternately along a predetermined direction. The predetermined direction may be the fiber orientation direction of the core wrap sheet 6B, or a direction perpendicular to the fiber orientation direction of the core wrap sheet 6B. In addition, the predetermined direction is not limited to these, and may be another direction. When the core wrap sheet 6B is viewed in a plan view, the adhesive 21 is formed in a serpentine shape, and a portion of the compressed portion 20 and a portion of the adhesive 21 overlap each other. By applying the adhesive 21 in a meandering shape to the core wrap sheet 6B on the skin-facing side, the compressed portion 20 has an area where the adhesive 21 is applied and an area where the adhesive 21 is not applied. After applying the adhesive 21 to the core wrap sheet 6B on the skin-facing side, the top sheet 7 is placed on the core wrap sheet 6B, so that the core wrap sheet 6B and the top sheet 7 are intermittently bonded to each other. Furthermore, by applying the adhesive 21 in a meandering shape to the absorbent core 6A or the core wrap sheet 6B on the skin-facing side, the compressed portion 20 has an area where the adhesive 21 is applied and an area where the adhesive 21 is not applied. After applying the adhesive 21 to the absorbent core 6A or the core wrap sheet 6B on the skin-facing side, the core wrap sheet 6B is placed on the absorbent core 6A, so that the absorbent core 6A and the core wrap sheet 6B are intermittently bonded to each other. Furthermore, the adhesive 21 may have a shape in which a plurality of arc shapes and a plurality of straight lines are alternately arranged.

[0031] The thickness of the multiple bonded parts and the size of the non-bonded part between two adjacent bonded parts of the multiple bonded parts can be set to any value within a range in which sufficient adhesive strength can be exerted. The thickness of the multiple bonded parts (e.g., adhesives 21A to 21C) may be 0.1 mm or more and 2 mm or less. The size of the non-bonded part between two adjacent bonded parts of the multiple bonded parts (e.g., the size of the non-bonded part between adhesive 21A and adhesive 21B) may be 1 mm or more and 20 mm or less. The width of the compressed parts 20 (e.g., grooves 20A and 20B) may be 0.5 mm or more and 20 mm or less. The depth of the compressed parts 20 (e.g., grooves 20A and 20B) may be 0.5 mm or more and 5 mm or less.

[0032] One of the multiple adhesive portions and another of the multiple adhesive portions may be disposed adjacent to each other. For example, adhesive 21A and adhesive 21B may be disposed adjacent to each other, or adhesive 21B and adhesive 21C may be disposed adjacent to each other. In addition, when core wrap sheet 6B is viewed in a plan view, a part of the adhesive of one of the multiple adhesive portions and another of the multiple adhesive portions may be disposed adjacent to each other. For example, a part of adhesive 21A and a part of adhesive 21B may overlap, or a part of adhesive 21B and a part of adhesive 21C may overlap.

[0033] The grooves 20A of the compression section 20 have, between the core wrap sheet 6B and the top sheet 7, a bonded portion where the core wrap sheet 6B and the top sheet 7 are bonded, and a non-bonded portion where the core wrap sheet 6B and the top sheet 7 are not bonded. Similarly, the grooves 20B of the compression section 20 have, between the core wrap sheet 6B and the top sheet 7, a bonded portion where the core wrap sheet 6B and the top sheet 7 are bonded, and a non-bonded portion where the core wrap sheet 6B and the top sheet 7 are not bonded.

[0034] For example, when the entire skin-facing side of the core wrap sheet 6B is bonded to the top sheet 7, the compression portion 20 (grooves 20A and 20B) has high rigidity, so the hardness of the compression portion 20 is directly transmitted to the wearer's skin. In this embodiment, by intermittently bonding the core wrap sheet 6B and the top sheet 7, the diaper 1 may have a non-bonded portion in the compression portion 20 where the core wrap sheet 6B and the top sheet 7 are not bonded. In the non-bonded portion, a space is formed between the core wrap sheet 6B and the top sheet 7. The distance between the core wrap sheet 6B and the top sheet 7 in the non-bonded portion is longer than the distance between the core wrap sheet 6B and the top sheet 7 in the bonded portion. By intermittently bonding the core wrap sheet 6B and the top sheet 7, the top sheet 7 can move relative to the core wrap sheet 6B. This makes it difficult for the wearer to feel the hardness of the compression portion 20, improving the wearing comfort of the diaper 1 for the wearer.

[0035] For example, when the entire surface of the non-skin-facing side of the core wrap sheet 6B is bonded to the absorbent core 6A, the compressed portion 20 has high rigidity, so that the hardness of the compressed portion 20 is directly transmitted to the wearer's skin. In this embodiment, the absorbent core 6A and the core wrap sheet 6B are bonded intermittently, so that the diaper 1 may have a non-bonded portion in the compressed portion 20 where the absorbent core 6A and the core wrap sheet 6B are not bonded. In the non-bonded portion, a space is formed between the absorbent core 6A and the core wrap sheet 6B. The distance between the absorbent core 6A and the core wrap sheet 6B in the non-bonded portion is longer than the distance between the absorbent core 6A and the core wrap sheet 6B in the bonded portion. By bonding the absorbent core 6A and the core wrap sheet 6B intermittently, the core wrap sheet 6B can move relative to the absorbent core 6A. This makes it difficult for the wearer to feel the hardness of the compressed portion 20, and improves the wearing comfort of the diaper 1 for the wearer.

[0036] The diaper 1 may have a non-adhesive portion in the compressed portion 20 that is not bonded either between the core wrap sheet 6B and the top sheet 7 or between the absorbent core 6A and the core wrap sheet 6B. The diaper 1 may have a non-adhesive portion in the compressed portion 20 that is not bonded either between the core wrap sheet 6B and the top sheet 7 or between the absorbent core 6A and the core wrap sheet 6B. By providing a non-adhesive portion both between the core wrap sheet 6B and the top sheet 7 and between the absorbent core 6A and the core wrap sheet 6B, the top sheet 7 can move relative to the core wrap sheet 6B, and the core wrap sheet 6B can move relative to the absorbent core 6A. This makes it less likely for the wearer to feel the hardness in the compressed portion 20, and improves the wearing comfort of the diaper 1 for the wearer.

[0037] The non-adhesive portion may be disposed at the curved portion of the compressed portion 20 in the cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. The non-adhesive portion may be disposed at the curved portion of the groove 20A in the cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. The curved portion of the groove 20A may be angular (bent) or curved. The curved portion of the groove 20A may be Since the non-adhesive portions are highly rigid, the stiffness of the curved portions of the grooves 20A is easily transmitted to the wearer's skin. In this embodiment, by arranging non-adhesive portions at the curved portions of the grooves 20A in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B, the wearer is less likely to feel the stiffness of the grooves 20A, and the wearing comfort of the diaper 1 for the wearer can be improved.

[0038] A non-adhesive portion may be disposed at the curved portion of the groove 20B in the cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. The curved portion of the groove 20B may be angular (bent) or curved. Since the curved portion of the groove 20B has high rigidity, the stiffness of the curved portion of the groove 20B is easily transmitted to the wearer's skin. In this embodiment, by disposing a non-adhesive portion at the curved portion of the groove 20B in the cross-sectional view of the absorbent core 6A or the core wrap sheet 6B, the wearer is less likely to feel the stiffness of the groove 20B, and the wearing comfort of the diaper 1 for the wearer can be improved.

[0039] The compressed portion 20 has a side surface (wall surface) including a directional component perpendicular to the planar direction of the absorbent core 6A or the core wrap sheet 6B, and a bottom surface including a directional component parallel to the planar direction of the absorbent core 6A or the core wrap sheet 6B. A non-adhesive portion may be disposed on a part or all of the bottom surface of the compressed portion 20. The bottom surface of the compressed portion 20 may be a flat surface or a curved surface. The bottom surface of the compressed portion 20 may be a shape composed of a flat surface and a curved surface. The bottom surface portion (bottom portion) of the compressed portion 20 is easily compressed and hardened, so that the hardness of the bottom surface portion of the compressed portion 20 is easily transmitted to the skin of the wearer. In this embodiment, by disposing a non-adhesive portion on a part or all of the bottom surface of the compressed portion 20 in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B, the wearer is less likely to feel the hardness of the compressed portion 20, and the wearing comfort of the diaper 1 for the wearer can be improved.

[0040] The groove 20A has a side surface (wall surface) including a directional component perpendicular to the planar direction of the absorbent core 6A or the core wrap sheet 6B, and a bottom surface including a directional component parallel to the planar direction of the absorbent core 6A or the core wrap sheet 6B. A non-adhesive portion may be disposed on a part or all of the bottom surface of the groove 20A in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. The bottom surface of the groove 20A may be a flat surface or a curved surface. The bottom surface of the groove 20A may be a shape composed of a flat surface and a curved surface. The bottom surface portion (bottom) of the groove 20A is easily compressed and hardened, so that the hardness of the bottom surface portion of the groove 20A is easily transmitted to the skin of the wearer. In this embodiment, by disposing a non-adhesive portion on a part or all of the bottom surface of the groove 20A in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B, the wearer is less likely to feel the hardness of the groove 20A, and the wearing comfort of the diaper 1 for the wearer can be improved.

[0041] The groove 20B has a side surface (wall surface) including a directional component perpendicular to the planar direction of the absorbent core 6A or the core wrap sheet 6B, and a bottom surface including a directional component parallel to the planar direction of the absorbent core 6A or the core wrap sheet 6B. A non-adhesive portion may be disposed on a part or all of the bottom surface of the groove 20B in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. The bottom surface of the groove 20B may be a flat surface or a curved surface. The bottom surface of the groove 20B may be a shape composed of a flat surface and a curved surface. The bottom surface portion (bottom portion) of the groove 20B is easily compressed and hardened, so that the hardness of the bottom surface portion of the groove 20B is easily transmitted to the skin of the wearer. In this embodiment, by disposing a non-adhesive portion on a part or all of the bottom surface portion of the groove 20B in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B, the wearer is less likely to feel the hardness of the groove 20B, and the wearing comfort of the diaper 1 for the wearer can be improved.

[0042] A non-adhesive portion may be disposed at the boundary between the side and bottom surfaces of the compressed portion 20, which is a curved portion of the compressed portion 20 in cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be raised from the boundary between the side and bottom surfaces of the compressed portion 20, which is a curved portion in cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. , it becomes easier for the compressed air to move to the side and bottom sides of the compression portions 20. As a result, the wearer is less likely to feel the hardness of the compression portions 20, and the comfort of the diaper 1 when worn by the wearer can be improved.

[0043] A non-adhesive portion may be disposed at the boundary between the side and bottom surfaces of the groove 20A, where the groove 20A is curved in cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be lifted up from the boundary between the side and bottom surfaces of the groove 20A, where the absorbent core 6A or the core wrap sheet 6B is curved in cross-sectional view, and to move toward the side and bottom surfaces of the groove 20A. This makes it harder for the wearer to feel the stiffness of the groove 20A, improving the fit of the diaper 1 for the wearer.

[0044] A non-adhesive portion may be disposed at the boundary between the side surface and the bottom surface of the groove 20B, where the groove 20B is curved in cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be lifted up from the boundary between the side surface and the bottom surface of the groove 20B, where the absorbent core 6A or the core wrap sheet 6B is curved in cross-sectional view, and to move toward the side surface and bottom surface of the groove 20B. This makes it harder for the wearer to feel the stiffness of the groove 20B, improving the fit of the diaper 1 for the wearer.

[0045] Non-adhesive portions may be disposed on all or part of the side surfaces of the compressed portions 20 in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be raised from the side surfaces of the compressed portions 20 in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B and to move toward the bottom surfaces of the compressed portions 20. This makes it harder for the wearer to feel the hardness of the compressed portions 20, improving the comfort of wearing the diaper 1 for the wearer.

[0046] Non-adhesive portions may be disposed on some or all of the side surfaces of the grooves 20A in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be raised from the side surfaces of the grooves 20A in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B and to move toward the bottom surfaces of the grooves 20A. This makes it harder for the wearer to feel the stiffness of the grooves 20A, improving the comfort of wearing the diaper 1 for the wearer.

[0047] Non-adhesive portions may be disposed on all or part of the side surfaces of the grooves 20B in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B. This makes it easier for the top sheet 7 to be raised from the side surfaces of the grooves 20B in a cross-sectional view of the absorbent core 6A or the core wrap sheet 6B and to move toward the bottom surfaces of the grooves 20B. This makes it harder for the wearer to feel the stiffness of the grooves 20B, improving the fit of the diaper 1 for the wearer.

[0048] A non-adhesive portion may be disposed at the intersection of groove 20A and groove 20B, which makes the wearer less likely to feel stiffness at the intersection of groove 20A and groove 20B, thereby improving the fit of diaper 1 to the wearer.

[0049] A second sheet (not shown) may be further disposed between the absorbent body 6 and the top sheet 7. The second sheet is liquid permeable, like the top sheet 7. The second sheet may be intermittently bonded to the top sheet 7. The second sheet may be intermittently bonded to the core wrap sheet 6B. The diaper 1 may have a non-adhesive portion in the compression section 20 that is not bonded either between the second sheet and the top sheet 7 or between the second sheet and the core wrap sheet 6B. The diaper 1 may have a non-adhesive portion in the compression section 20 that is not bonded between the second sheet and the top sheet 7 and between the second sheet and the core wrap sheet 6B.

[0050] The compressed section 20 may be arranged in a grid pattern with a plurality of grooves angled in the longitudinal direction of the absorbent core 6A, and may be arranged so that the continuous direction (stretching direction) of the continuous linear adhesive 21 coincides with the longitudinal direction of the absorbent core 6A. For example, the grid of the plurality of grooves in the compressed section 20 may be inclined at 45 degrees with respect to the longitudinal direction of the absorbent core 6A.

[0051] <Other embodiments> Next, other embodiments will be described. The diaper 1 according to the above embodiment is a tape-type diaper, but the absorbent article according to the present invention can be applied to pants-type diapers. [Explanation of symbols]

[0052] 1. Diapers 2F: Front patch 2L, 2R Tape 4. Cover sheet 5. Back sheet 6. Absorber 6A··Absorbent core 6B··Core wrap sheet 7. Top sheet 8. Side seat 20. Pressing section 20A,20B·Groove 21. Adhesive

Claims

1. an absorbent body having an absorbent core for absorbing liquid and a core wrap sheet covering at least a part of the absorbent core and having a groove recessed from the skin-facing side to the non-skin-facing side; A skin-facing sheet disposed on the skin-facing side of the absorbent body; a non-adhesive portion in the groove that is not bonded either between the skin-facing sheet and the core wrap sheet or between the core wrap sheet and the absorbent core; Equipped with Absorbent articles.

2. The non-adhesive portion is disposed in a curved portion of the groove portion in a cross-sectional view. The absorbent article of claim 1.

3. The groove portion has a side surface including a directional component perpendicular to the planar direction of the absorbent core, and a bottom surface including a directional component parallel to the planar direction of the absorbent core, The non-adhesive portion is disposed on a part or the whole of the bottom surface of the groove portion. The absorbent article of claim 1.

4. The groove portion has a side surface including a directional component perpendicular to the planar direction of the absorbent core, and a bottom surface including a directional component parallel to the planar direction of the absorbent core. The non-adhesive portion is disposed at a boundary portion between the side surface and the bottom surface of the groove portion and at a curved portion of the groove portion in a cross-sectional view. The absorbent article of claim 1.

5. The groove portion has a side surface including a directional component perpendicular to the planar direction of the absorbent core, and a bottom surface including a directional component parallel to the planar direction of the absorbent core, The non-adhesive portion is disposed on a part or the whole of the side surface of the groove portion. The absorbent article of claim 1.

6. The groove portion has a plurality of grooves, The non-adhesive portion is disposed at an intersection portion where the plurality of grooves intersect. The absorbent article of claim 1.

7. The core wrap sheet and the skin side sheet are bonded together, and a plurality of adhesive portions are provided between the core wrap sheet and the skin side sheet at a distance from each other and arranged in a predetermined area including the area in which the groove portion is formed, The plurality of adhesive portions are formed by a continuous line of adhesive that bonds the core wrap sheet and the skin-facing sheet, A portion of the adhesive and a plurality of the non-adhesive portions are alternately arranged along a predetermined direction, and a portion of the groove portion and a portion of the adhesive are overlapped with each other.

7. An absorbent article according to any one of claims 1 to 6.

8. When the core wrap sheet is viewed in a plane, the adhesive is formed in a spiral shape or a serpentine shape. The absorbent article of claim 7.

Images