WO2023112759A1

WO2023112759A1 - Absorbent article

Info

Publication number: WO2023112759A1
Application number: PCT/JP2022/044785
Authority: WO
Inventors: 蓮蓮沈; 興旺徐; 詩▲雲▼ 黄; 悟丹下; 寧佐山
Original assignee: ユニ・チャーム株式会社
Priority date: 2021-12-16
Filing date: 2022-12-05
Publication date: 2023-06-22
Also published as: JP2023089756A; CN118215452A

Abstract

One embodiment of the present invention provides an absorbent article which has a longitudinal direction connecting the ventral side and the dorsal side of a wearer, and a width direction that is orthogonal to the longitudinal direction. This absorbent article is provided with an absorbent which comprises: one or more first embossed parts, each of which has a front-side projected part that protrudes toward the skin surface side of a wearer and a back-side recessed part that is recessed toward the skin surface side of the wearer; and a second embossed part which has a front-side recessed part that is recessed toward the non-skin surface side of the wearer and a back-side projected part that protrudes toward the non-skin surface side of the wearer. When viewed from the skin surface side, the back-side recessed part of the first embossed part and the front-side recessed part of the second embossed part are formed to be out of alignment with each other.

Description

absorbent article

The present disclosure relates to absorbent articles.

Absorbent articles such as disposable diapers and sanitary napkins are widely used. This type of absorbent article includes an absorbent body that absorbs body fluids of the wearer, such as urine and blood. For example, Patent Literature 1 describes a disposable diaper having an absorbent body. The absorbent surface of the absorbent body of this disposable diaper is formed with grid-like grooves recessed from the wearer's skin side toward the non-skin side. By forming the grooves on the absorbent surface of the absorbent body, a gap is formed between the skin surface of the wearer and the absorbent surface of the absorbent body, thereby enhancing the breathability of the disposable diaper.

Japanese Patent No. 6911515

In order to increase the breathability of absorbent articles, it is necessary to increase the gap between the wearer's skin surface and the absorbent body. In order to form deep grooves in the absorber in order to increase the voids, it is necessary to increase the thickness of the absorber. However, increasing the thickness of the absorbent body increases the rigidity of the absorbent body, impairing the wearing comfort of the absorbent article. On the other hand, if the thickness of the absorbent body is reduced in order to improve the wearing comfort of the absorbent article, the depth of the voids that can be formed in the absorbent body is reduced, resulting in impairing the breathability.

Therefore, there is a demand for providing an absorbent article that can achieve both reduction in thickness of the absorbent body and improvement in breathability.

In one aspect, an absorbent article is provided that has a longitudinal direction connecting the wearer's ventral side and a dorsal side, and a width direction orthogonal to the longitudinal direction. This absorbent article includes one or more first embossed portions including a surface convex portion protruding toward the wearer's skin side and a back concave portion recessed toward the skin side, and recessed toward the non-skin side of the wearer. The absorbent body includes a second embossed portion including a surface concave portion and a back convex portion protruding toward the non-skin surface side. When viewed from the skin side, the recessed portions on the back surface of the first embossed portion and the recessed portions on the surface of the second embossed portion are formed at positions shifted from each other.

In the absorbent article according to the above aspect, since the surface convex portion of the first embossed portion protrudes to the skin surface side and the surface concave portion of the second embossed portion is concave to the non-skin surface side, the surface concave portion of the second embossed portion is The height of the surface convex portion of the first embossed portion used as a reference can be increased. Therefore, a large gap can be formed between the wearer's skin surface and the surface concave portion of the second embossed portion without increasing the thickness of the absorbent body. Therefore, according to the absorbent article according to this aspect, it is possible to achieve both reduction in the thickness of the absorbent body and improvement in breathability.

In one aspect, the recesses on the back surface of the first embossed portion may be arranged on the non-skin surface side of the recesses on the surface of the second embossed portion. In this aspect, it is possible to reduce the thickness of the absorber.

In one aspect, the recesses on the back surface of the first embossed portion may be arranged closer to the skin than the recesses on the surface of the second embossed portion. In this aspect, the voids formed on the surface of the absorbent body can be increased, so that the breathability of the absorbent article can be improved.

In one aspect, the absorbent body may include a plurality of first embossed portions, and the plurality of first embossed portions may be arranged at intervals in the width direction. By arranging the plurality of first embossed portions at intervals in the width direction, air can pass between the plurality of first embossed portions, so that the breathability of the absorbent article can be improved. can.

In one aspect, the plurality of first embossed portions may be arranged at intervals in the longitudinal direction. By arranging the plurality of first embossed portions at intervals in the longitudinal direction, air can pass between the plurality of first embossed portions, thereby improving the breathability of the absorbent article. be able to.

In one aspect, the second embossed portions may be arranged between the plurality of first embossed portions. By forming the second embossed portions between the plurality of first embossed portions, deep voids are formed between the plurality of first embossed portions, so that the breathability of the absorbent article is improved. can be done.

In one aspect, the total area of the plurality of first embossed portions viewed from the skin side may be larger than the area of the second embossed portions viewed from the skin side. In this aspect, the wearer's bodily fluids can be effectively absorbed by the plurality of first embossed portions.

In one aspect, the second embossed portion is formed along a grid-like pattern when viewed from the skin surface side, and the plurality of first embossed portions are within the plurality of absorbent regions defined by the second embossed portion may be formed respectively. By forming the second embossed portions along the lattice pattern, the wearer's bodily fluids and air can flow in the longitudinal direction and the width direction of the absorbent article, thereby improving the breathability of the absorbent article. can be improved.

In one aspect, the maximum width in the width direction of at least one absorbent region among the plurality of absorbent regions may be greater than the maximum width in the longitudinal direction of one absorbent region. In this aspect, body fluid flowing in the longitudinal direction can be effectively absorbed in at least one absorbent region, so body fluid leakage from the ends in the longitudinal direction of the absorbent article can be suppressed.

In one aspect, the absorbent body includes a superabsorbent polymer, each of the plurality of absorbent regions of the absorbent body includes a central region and a peripheral region surrounding the central region, the density of the superabsorbent polymer present in the central region may be lower than the density of the superabsorbent polymer present in the peripheral region. Areas of lower density of superabsorbent polymer are more air permeable than areas of higher density of superabsorbent polymer. Therefore, the air permeability of the absorbent article can be improved by lowering the density of the superabsorbent polymer in the central region, which tends to come into contact with the wearer's skin.

In one aspect, the absorbent body comprises a first absorbent layer positioned on the skin side, a second absorbent layer positioned on the non-skin side, and an intermediate layer positioned between the first absorbent layer and the second absorbent layer. and the first absorbent layer, the second absorbent layer and the intermediate layer may comprise a superabsorbent polymer. In this aspect, since the superabsorbent polymer is dispersed in the first absorbent layer, the second absorbent layer and the intermediate layer, the breathability of the absorbent body can be improved.

In one aspect, each of the plurality of absorbent regions of the absorbent body includes a central region and a peripheral region surrounding the central region, and the absorbent body includes a first absorbent layer positioned on the skin side and a first absorbent layer positioned on the non-skin side. a second absorbent layer and an intermediate layer positioned between the first absorbent layer and the second absorbent layer, wherein the first absorbent layer, the second absorbent layer and the intermediate layer comprise a superabsorbent polymer; The density of the superabsorbent polymer present in the intermediate layer of the region may be higher than the density of the superabsorbent polymer present in the intermediate layer of the peripheral region. In this aspect, since the density of the superabsorbent polymer in the intermediate layer of the peripheral region is relatively low, the air permeability of the peripheral region can be improved.

In one aspect, the absorbent body further comprises a top sheet disposed on the skin side, the top sheet is formed with a plurality of ventilation holes, and at least one or more of the plurality of ventilation holes is located on the skin side. It may overlap with the second embossed portion when viewed from above. By arranging the air holes so as to overlap the second embossed parts, the moisture in the voids defined on the skin side of the absorbent body by the second embossed parts is released through the air holes. The breathability of the article can be improved.

In one aspect, the absorbent body further comprises a top sheet disposed on the skin side, the top sheet is formed with a plurality of ventilation holes, and at least one or more of the plurality of ventilation holes is located on the skin side. It may overlap with the first embossed portion when viewed from above. By arranging the ventilation holes so as to overlap the first embossed portions when viewed from the skin surface side, the moisture absorbed by the first embossed portions can be released through the ventilation holes, thereby improving ventilation of the absorbent article. can improve sexuality.

In one aspect, it may further include a cushion sheet provided between the top sheet and the absorbent body and having a higher rigidity than that of the top sheet. By arranging a highly rigid cushion sheet between the top sheet and the absorbent body, the top sheet is less likely to enter the gap formed on the skin surface side of the absorbent body, making it easier to maintain the volume of the gap. Therefore, the breathability of the absorbent article can be improved.

In one aspect, at least a portion of the cushion sheet may have a tapered shape that narrows in the width direction as it approaches the ends in the longitudinal direction. By changing the width of the cushion sheet, wrinkles are formed in the top sheet on the cushion sheet, and a gap is formed between the top sheet and the absorbent body. As a result, air flows through the voids, and the breathability of the absorbent article can be improved.

According to various aspects of the present invention, it is possible to achieve both reduction in thickness of the absorbent body and improvement in breathability.

1 is a perspective view schematically showing an absorbent article according to one embodiment; FIG. 1 is a plan view of an absorbent article viewed from the skin surface side; FIG. Fig. 2 is a plan view of the absorbent article viewed from the non-skin surface side; FIG. 3 is a cross-sectional view of the absorbent article taken along line IV-IV of FIG. 2; Fig. 2 is a plan view of the absorbent body viewed from the skin surface side; Fig. 3 is a plan view of the absorbent body viewed from the non-skin surface side; FIG. 6 is a cross-sectional view of the absorber along line VII-VII in FIG. 5; It is a top view which expands and shows a part of absorber. It is a top view which shows the modification of an absorber. It is a sectional view showing a modification of an absorber. It is a figure which shows roughly the modification of a 2nd embossing part.

Embodiments of the present disclosure will be described below with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description will not be repeated. The drawings may be partially simplified or exaggerated for easier understanding, and the dimensional ratios are not limited to those described in the drawings.

An absorbent article according to one embodiment will be described below. FIG. 1 is a perspective view of an absorbent article 1 according to one embodiment. 2 is a plan view of the absorbent article 1 viewed from the skin side Z1, and FIG. 3 is a plan view of the absorbent article 1 viewed from the non-skin side Z2. FIG. 4 is a cross-sectional view of the absorbent article 1 taken along line IV-IV of FIG. The absorbent article 1 shown in FIGS. 1-4 is a pants-type disposable diaper that absorbs the wearer's urine. Note that the absorbent article 1 is not limited to a pants-type disposable diaper, and may be a tape-type disposable diaper, a pet disposable diaper, toilet training pants, a sanitary napkin, or the like.

2 and 3, the absorbent article 1 is cut at the side ends 34 of the ventral waist portion 3 and the side ends 44 of the dorsal waist portion 4, which will be described later, and the absorbent article 1 is cut to a state where no wrinkles are formed. 1 shows the absorbent article 1 in a stretched state with 1 unfolded. The skin side Z1 is the side facing the wearer's skin when the absorbent article 1 is in use (wearing state), and the non-skin side Z2 is the use state (wearing state) of the absorbent article 1. This is the side facing away from the wearer's skin when . A wearer is a subject who wears the absorbent article 1 . In the following description, the positional relationship in the extended state will be described unless otherwise specified.

As shown in FIGS. 2 and 3, the absorbent article 1 extends in the width direction X and the longitudinal direction Y in the stretched state. The longitudinal direction Y is the direction extending between the abdomen and the back of the wearer when the absorbent article 1 is worn. The width direction X is a direction orthogonal to the longitudinal direction Y, and is a direction extending in the lateral direction of the wearer when the absorbent article 1 is worn. The thickness direction Z is a direction perpendicular to the width direction X and the longitudinal direction Y. As shown in FIG. In the following description, one end side of the absorbent article 1 in the longitudinal direction Y may be referred to as the ventral side, and the other end side in the longitudinal direction Y may be referred to as the dorsal side.

The absorbent article 1 includes a ventral waist portion 3, a back waist portion 4, and a body portion 10. The body portion 10 has a substantially rectangular planar shape elongated in the longitudinal direction Y of the absorbent article 1 . As shown in FIGS. 2 and 3, the main body 10 includes a ventral end 10a arranged at one end in the longitudinal direction Y, a dorsal end 10b arranged at the other end in the longitudinal direction Y, It includes a crotch portion 10c arranged in the longitudinal direction Y between the ventral end 10a and the dorsal end 10b.

The ventral waist portion 3 is joined to the ventral side end portion 10a of the main body portion 10 from the non-skin surface side Z2. The back side waist portion 4 is joined to the back side end portion 10b of the body portion 10 from the non-skin side Z2. In the absorbent article 1, the main body portion 10 is folded in half so that the abdominal waist portion 3 and the back waist portion 4 face each other, and the side end portion 34 in the width direction X of the abdomen waist portion 3 and the back waist portion are separated. By welding the side ends 44 of the portion 4 in the width direction X, the ventral waist portion 3 and the back waist portion 4 are connected in a belt shape. Thereby, as shown in FIG. 1, the absorbent article 1 is formed into a pants type. The pants-type absorbent article 1 is formed with a waist opening BH through which the wearer's torso is passed, and a pair of leg openings LH through which the wearer's legs are passed.

The abdominal waist portion 3 has a substantially rectangular planar shape whose longitudinal direction is the width direction X of the absorbent article 1, and is arranged on the non-skin surface side Z2 relative to the abdominal end portion 10a of the main body portion 10. ing. The abdominal waist portion 3 includes a skin sheet 31 arranged on the skin side Z1, a non-skin sheet 32 arranged on the non-skin side Z2, and a plurality of elastic members (second elastic members) 33. contains. The skin sheet 31 and the non-skin sheet 32 are, for example, an SMS nonwoven fabric, a spunbond nonwoven fabric, an air-through nonwoven fabric, a plastic sheet, a perforated plastic sheet, or a laminate of these nonwoven fabrics, in which spunbond, meltblown and spunbond are laminated in this order. etc. The skin sheet 31 and the non-skin sheet 32 are joined together with an adhesive such as hot melt.

A plurality of stretchable members 33 are arranged at intervals in the longitudinal direction Y between the skin sheet 31 and the non-skin sheet 32 . The plurality of stretchable members 33 extend between side ends 34 in the width direction X of the ventral waist portion 3 . Therefore, the ventral waist portion 3 expands and contracts in the width direction X while fitting to the wearer's waist. The elastic member 33 is made of an elastic material such as rubber or spandex. As shown in FIG. 2, at least some of the plurality of stretchable members 33 extend across the width direction X of the absorber 13, which will be described later, when viewed from the skin surface side Z1.

The dorsal waist portion 4 has a substantially rectangular planar shape elongated in the width direction X of the absorbent article 1 and is arranged on the non-skin surface side Z2 from the dorsal end portion 10b of the main body portion 10 . The back waist portion 4 includes a skin sheet 41 arranged on the skin side Z1, a non-skin sheet 42 arranged on the non-skin side Z2, and a plurality of elastic members (second elastic members) 43. contains. The skin sheet 41 and the non-skin sheet 42 are, for example, an SMS nonwoven fabric, a spunbond nonwoven fabric, an air-through nonwoven fabric, a plastic sheet, a perforated plastic sheet, or a laminate of these nonwoven fabrics, in which spunbond, meltblown and spunbond are laminated in order. etc. The skin sheet 41 and the non-skin sheet 42 are joined together with an adhesive such as hot melt.

A plurality of stretchable members 43 are arranged at intervals in the longitudinal direction Y between the skin sheet 41 and the non-skin sheet 42 . The plurality of stretchable members 43 extend between side ends 44 in the width direction X of the back waist portion 4 . Therefore, the back side waist part 4 expands and contracts in the width direction X while fitting to the wearer's waist. The elastic member 43 is made of an elastic material such as rubber or spandex. As shown in FIG. 2, at least some of the plurality of stretchable members 43 extend across the width direction X of the absorber 13, which will be described later, when viewed from the skin surface side Z1.

The body portion 10 includes a top sheet 11, a back sheet 12 and an absorbent body 13. The top sheet 11 constitutes the surface of the body portion 10 that is brought into contact with the wearer, and is arranged on the skin surface side Z1. The top sheet 11 includes a center sheet 11a covering the absorber 13 and side sheets 11b covering both sides in the width direction X of the center sheet 11a. The center sheet 11a is made of, for example, a water-permeable nonwoven fabric such as a spunbond nonwoven fabric. The side sheet 11b is made of, for example, a water-impermeable nonwoven fabric. Both ends of the side sheet 11b in the longitudinal direction Y are joined to the center sheet 11a with a hot-melt adhesive or the like.

Leakage prevention gathers 80 are formed on the side sheet 11b. Leakage-preventing gathers 80 are arranged outside in the width direction X of the absorbent body 13 and suppress leakage of urine excreted into the absorbent body 13 in the width direction X. As shown in FIG. In one embodiment, the leak-proof gathers 80 include a pair of stretchable members (first stretchable members) 71 extending in the longitudinal direction Y, a standing portion 81 standing by contraction of the pair of stretchable members 71, and It includes a horizontal fixing portion 82 that serves as an erecting fulcrum of the erecting portion 81 and a vertical fixing portion 83 that serves as an erecting fulcrum of the erecting portion 81 in the longitudinal direction Y. As shown in FIG.

A pair of elastic members 71 are provided in the inner portion of the side seat 11b in the width direction X and extend in the longitudinal direction Y. The pair of elastic members 71 is, for example, thread rubber or flat rubber that can contract in the length direction. The pair of stretchable members 71 are spaced apart from each other across the center line CL in the width direction X of the main body 10, and are fixed to the side seat 11b while being stretched in the longitudinal direction Y. As shown in FIG. The ventral ends of the pair of stretchable members 71 are arranged at the ventral end 10a, and the dorsal ends of the pair of stretchable members 71 are arranged at the dorsal end 10b. The pair of elastic members 71 are arranged on the non-skin surface side Z2 of the absorbent body 13 .

The lateral fixing portion 82 is formed in substantially the entire longitudinal direction Y of the main body portion 10 at a position outside the standing portion 81 in the width direction X of the side seat 11b. The lateral fixed portion 82 is a part of the side seat 11b and is fixed to the center seat 11a. The lateral fixing portion 82 serves as a standing fulcrum of the standing portion 81 in the width direction X. As shown in FIG.

The vertical fixing part 83 is formed on the ventral side end part 10a and the dorsal side end part 10b at positions inside the horizontal fixing part 82 in the width direction X. The vertical fixed portion 83 is a part of the side seat 11b and is fixed to the center seat 11a. The vertical fixed portion 83 serves as an upright fulcrum of the upright portion 81 in the longitudinal direction Y. As shown in FIG.

The standing portion 81 is formed between vertical fixing portions 83 respectively formed on the abdominal end portion 10a and the dorsal end portion 10b. That is, the upright portion 81 is arranged at a position inside the lateral fixing portion 82 in the width direction X and inside the longitudinal fixing portion 83 in the longitudinal direction Y. As shown in FIG. The standing portion 81 is a portion of the side seat 11b that is not fixed to the center seat 11a. An elastic member 71 elongated in the longitudinal direction Y is connected to the standing portion 81 . When the expandable member 71 contracts in the longitudinal direction Y, the body portion 10 is deformed in the closing direction, and the standing portion 81 rises with the horizontal fixing portion 82 as a starting point. Urinary leakage is prevented by standing upright portions 81 at positions sandwiching absorbent body 13 in the width direction X in this manner.

A pair of elastic members 72 extending in the longitudinal direction Y are provided on the outer side portion in the width direction X of the side seat 11b. As shown in FIG. 2 , the pair of elastic members 72 are arranged outside the pair of elastic members 71 in the width direction X. As shown in FIG. The pair of stretchable members 72 are, for example, thread rubber or flat rubber that can be contracted in the length direction, and are fixed to the side seat 11b while being stretched in the longitudinal direction Y. As shown in FIG. As described above, the pair of stretchable members 72 are fixed to the side seat 11b in a state of being stretched in the longitudinal direction Y, thereby applying force to deform the main body 10 in the closing direction. The pair of stretchable members 72 are arranged on the non-skin surface side Z2 of the absorbent body 13, and are arranged along the side edges of the main body 10 between the top sheet 11 and the back sheet 12 of the main body 10. . By contracting the pair of elastic members 72 in the longitudinal direction Y, the side edges of the main body 10 fit around the wearer's legs. The pair of elastic members 72 may extend in the longitudinal direction Y while being sewn to the top sheet 11 and the back sheet 12 of the main body 10 .

A cushion sheet 22 may be provided between the top sheet 11 and the absorbent body 13 as shown in FIG. The cushion sheet 22 is made of, for example, a nonwoven fabric having higher rigidity than the top sheet 11 . By placing the cushion sheet 22 having high rigidity between the top sheet 11 and the absorbent body 13, it becomes difficult for the top sheet 11 to enter the surface voids 20 of the absorbent body 13, which will be described later, and the volume of the surface voids 20 is maintained. be done. The cushion sheet 22 is bonded to the top sheet 11 and the surface 14 of the absorbent body 13 with an adhesive such as hot melt.

At least part of the cushion seat 22 may have a tapered shape that shrinks in the width direction X as it approaches the end in the longitudinal direction Y. In the embodiment shown in FIG. 2, the cushion seat 22 is arranged in the crotch portion 10c of the main body portion 10, and the width in the width direction X of the cushion seat 22 is reduced as it approaches the dorsal end portion 10b. Since the cushion sheet 22 has such a shape, the top sheet 11 arranged on the cushion sheet 22 is wrinkled, and a gap is formed between the top sheet 11 and the absorbent body 13 . The air permeability of the absorbent article 1 is improved by allowing air to flow through the voids.

Further, as shown in FIG. 4, the top sheet 11 may be formed with a plurality of ventilation holes 74 penetrating through the top sheet 11 in the thickness direction. A plurality of ventilation holes 74 are two-dimensionally formed in the top sheet 11 when viewed from the skin surface side Z1. For example, when viewed from the skin surface side Z1, at least one or more vent holes 74 out of the plurality of vent holes 74 overlap at least one of the first embossed portion 16 and the second embossed portion 18 of the absorber 13, which will be described later. may be placed.

The back sheet 12 constitutes a surface positioned on the outer side of the body portion 10 when worn, and is arranged on the non-skin surface side Z2. The back sheet 12 includes a water-impermeable back film 12a and a back non-woven fabric 12b arranged on the non-skin surface side Z2 of the back film 12a. The width of the back film 12a in the width direction X may be smaller than the width of the back nonwoven fabric 12b in the width direction X, and the back nonwoven fabric 12b may extend to both sides in the width direction X beyond the back film 12a.

The absorber 13 is arranged between the top sheet 11 and the back sheet 12 of the body part 10 and absorbs the wearer's urine that permeates through the top sheet 11 . 5 is a plan view of the absorbent body 13 seen from the skin side Z1, and FIG. 6 is a plan view of the absorbent body 13 seen from the non-skin side Z2. FIG. 7 is a cross-sectional view of absorbent body 13 taken along line VII-VII in FIG. As shown in FIG. 5, the absorbent body 13 has a substantially rectangular shape elongated in the longitudinal direction Y when viewed from the skin surface side Z1, and the width of the absorbent body 13 in the width direction X is equal to It is formed shorter than the width in X. The absorber 13 is arranged substantially in the center of the body portion 10 in the width direction X. As shown in FIG. The ventral end of the absorber 13 is arranged at the ventral end 10a of the main body 10, and the dorsal end of the absorber 13 is arranged at the dorsal end 10b of the main body 10 ( See Figure 2).

The absorbent body 13 has a front surface 14 arranged on the wearer's skin side Z1 and a back surface 15 arranged on the wearer's non-skin side Z2. The absorbent body 13 is embossed from the skin surface side Z1 and the non-skin surface side Z2. Concavo-convex shapes formed on the front surface 14 and the back surface 15 of the absorber 13 will be described later.

As shown in FIG. 7, the absorbent body 13 includes a core portion 13a and a core wrap 13b. The core portion 13a includes, for example, plant-derived pulp fibers and a super absorbent polymer (SAP), and has water absorbency. The core wrap 13b is made of, for example, a tissue or a non-woven fabric sheet, and covers the skin side Z1 and the non-skin side Z2 of the core portion 13a. The core wrap 13b is adhered to the surface of the core portion 13a with, for example, a hot melt adhesive. The area of the core wrap 13b bonded to the core portion 13a may be larger than the area of the core wrap 13b not bonded to the core portion 13a. Therefore, the core wrap 13b is joined to the core portion 13a so as to follow the uneven surface shape of the core portion 13a. In one embodiment, the skin surface side Z1 and the non-skin surface side Z2 of the core wrap 13b constitute the front surface 14 and the back surface 15 of the absorbent body 13, respectively.

A pair of slits 61 may be formed in the absorber 13 as shown in FIG. The pair of slits 61 are arranged apart from each other across the center line CL of the main body 10 and extend in the longitudinal direction Y. As shown in FIG. The basis weight of the pair of slits 61 is set lower than the basis weight of other portions of the absorbent body 13 . For example, the pair of slits 61 are elongated through-holes penetrating through the absorbent body 13 in the thickness direction, and the basis weight of the slits 61 is zero. Forming the pair of slits 61 in the absorber 13 facilitates the flow of urine excreted from the wearer in the longitudinal direction Y. As shown in FIG. That is, the pair of slits 61 has the function of controlling the direction of urine flow.

The absorbent body 13 includes a plurality of first embossed portions 16 and second embossed portions 18 . The plurality of first embossed portions 16 are portions compressed from the non-skin surface side Z2 toward the skin surface side Z1 by embossing. As shown in FIG. 5, the plurality of first embossed portions 16 are two-dimensionally arranged when viewed from the skin surface side Z1. More specifically, as shown in FIG. 5 , the plurality of first embossed portions 16 are arranged at intervals in the width direction X and the longitudinal direction Y of the absorbent body 13 . Furthermore, the plurality of first embossed portions 16 are arranged at intervals in an oblique direction intersecting the width direction X and the longitudinal direction Y. As shown in FIG. In addition, the some 1st embossed part 16 should just be arrange|positioned two-dimensionally, and does not need to be arranged in the width direction X, the longitudinal direction Y, and the diagonal direction.

As shown in FIG. 7, each of the plurality of first embossed portions 16 includes a front convex portion 16a protruding toward the skin side Z1 and a rear concave portion 16b recessed toward the skin side Z1. The front convex portion 16a is a portion of the surface 14 of the absorbent body 13 that protrudes toward the skin side Z1, and the back concave portion 16b is a portion of the back surface 15 of the absorbent body 13 that is recessed toward the skin side Z1. That is, the front surface convex portions 16a and the rear surface concave portions 16b of the plurality of first embossed portions 16 form parts of the front surface 14 and the rear surface 15 of the absorbent body 13, respectively. Although not limited, the plurality of first embossed portions 16 are formed by, for example, using a roller formed with a plurality of convex portions having an inverted shape of the plurality of first embossed portions 16 so that the absorber 13 is placed on the non-skin surface side. Formed by squeezing from Z2. At least one of the front convex portion 16a and the rear concave portion 16b of the first embossed portion 16 may include a flat surface. In the following description, a region of the absorbent body 13 that overlaps the surface convex portion 16a in the thickness direction Z is referred to as a first embossed portion 16. As shown in FIG.

The second embossed portion 18 includes a surface recessed portion 18a recessed on the wearer's non-skin side Z2 and a back surface convex portion 18b protruding on the non-skin side Z2. The surface concave portion 18a is a portion of the surface 14 of the absorbent body 13 that is recessed toward the non-skin surface side Z2, and the rear surface convex portion 18b is a portion of the rear surface 15 of the absorbent body 13 that protrudes toward the non-skin surface side Z2. . In other words, the surface concave portion 18a and the rear surface convex portion 18b of the second embossed portion 18 form part of the front surface 14 and the rear surface 15 of the absorbent body 13, respectively. Although not limited, the second embossed portion 18 is formed by squeezing the absorbent body 13 from the skin surface side Z1 using, for example, a roller on which a convex portion having a reverse shape of the second embossed portion 18 is formed. be done. At least one of the surface concave portion 18a and the rear surface convex portion 18b of the second embossed portion 18 may include a flat surface. In the following description, a region of the absorbent body 13 that overlaps the rear surface convex portion 18b in the thickness direction Z is referred to as a second embossed portion 18. As shown in FIG.

As shown in FIG. 7, the surface convex portion 16a of the first embossed portion 16 is arranged closer to the skin surface side Z1 than the surface concave portion 18a of the second embossed portion 18. As shown in FIG. The rear concave portion 16b of the first embossed portion 16 is arranged closer to the skin surface side Z1 than the rear convex portion 18b of the second embossed portion 18 is. The back surface recessed portion 16b of the first embossed portion 16 is arranged on the non-skin surface side Z2 relative to the front surface recessed portion 18a of the second embossed portion 18. As shown in FIG. When viewed from the skin surface side Z1, the rear surface recessed portion 16b of the first embossed portion 16 and the front surface recessed portion 18a of the second embossed portion 18 are formed at positions shifted from each other.

As described above, the surface protrusions 16a and the surface recesses 18a are arranged at different positions in the thickness direction Z, so that the surface 14 of the absorber 13 is uneven. Similarly, since the back concave portion 16b and the back convex portion 18b are arranged at different positions in the thickness direction Z, the back surface 15 of the absorber 13 is formed with an uneven shape. Therefore, the surface 14 of the absorbent body 13 is defined by the surface recesses 18a, and the surface voids 20 that are open to the skin surface side Z1 are formed. Similarly, on the back surface 15 of the absorbent body 13, a back surface gap 21 defined by the back recess 16b and opening to the non-skin surface side Z2 is formed. These surface voids 20 and back voids 21 function as channels through which urine or air discharged from the wearer flows. For example, when a large amount of urine is supplied to the absorbent body 13 , urine that has not been completely absorbed by the absorbent body 13 is accumulated in the back surface gap 21 .

The total area of the plurality of first embossed portions 16 viewed from the skin side Z1 may be larger than the area of the second embossed portions 18 viewed from the skin side Z1. The total area of the plurality of first embossed portions 16 corresponds to the total projected area of the surface convex portions 16a of the plurality of first embossed portions 16 viewed from the skin surface side Z1. The area corresponds to the projected area of the surface recessed portion 18a of the second embossed portion 18 viewed from the skin surface side Z1.

As shown in FIG. 7, in one embodiment, the absorbent body 13 has a multi-layered structure including a first absorbent layer 26, a second absorbent layer 27 and an intermediate layer . The first absorbent layer 26 is a water absorbent layer containing a superabsorbent polymer, and is arranged on the skin surface side Z1. The second absorbent layer 27 is a water absorbent layer containing a super absorbent polymer, and is arranged on the non-skin surface side Z2. The intermediate layer 28 is arranged between the first absorbent layer 26 and the second absorbent layer 27 . When forming the first embossed portion 16 and the second embossed portion 18, the intermediate layer 28 is squeezed together with the first absorbent layer 26 and the second absorbent layer 27 and deformed into an uneven shape.

In addition to the first absorbent layer 26 and the second absorbent layer 27, the intermediate layer 28 may also contain the superabsorbent polymer. Although the intermediate layer 28 does not originally contain a superabsorbent polymer, the absorbent body 13 is squeezed during the formation of the first embossed portion 16 and the second embossed portion 18 so that the first absorbent layer 26 and the second absorbent A portion of the superabsorbent polymer contained in the layer 27 migrates to the intermediate layer 28 to place the superabsorbent polymer within the intermediate layer 28 . In this way, by including the superabsorbent polymer in the first absorbent layer 26, the second absorbent layer 27, and the intermediate layer 28, the superabsorbent polymer is dispersed and arranged in the thickness direction Z of the absorbent body 13, The breathability of the body 13 is improved. The density of the superabsorbent polymer present in the intermediate layer 28 may be lower than the density of the superabsorbent polymer present in the first absorbent layer 26 and the second absorbent layer 27 .

The second embossed portions 18 are formed between the plurality of first embossed portions 16 . For example, as shown in FIG. 5 , the second embossed portions 18 are formed so as to surround each of the plurality of first embossed portions 16 . More specifically, as shown in FIG. 8, the second embossed portion 18 may be formed along a grid pattern 24 when viewed from the skin surface side Z1. The lattice pattern 24 includes a plurality of first imaginary lines 24a extending parallel to each other in a direction intersecting the width direction X and the longitudinal direction Y, and a plurality of first imaginary lines 24a extending in a direction intersecting the width direction X and the longitudinal direction Y parallel to each other. and a plurality of existing second virtual lines 24b. The plurality of first virtual lines 24 a and the plurality of second virtual lines 24 b extend in symmetrical directions with respect to the center line CL of the absorbent article 1 and cross each other to form a grid pattern 24 . As shown in FIG. 8, the second embossed portions 18 may be intermittently formed along a plurality of first virtual lines 24a and a plurality of second virtual lines 24b. The second embossed portions 18 may be arranged in a wavy line pattern along the plurality of first virtual lines 24a and the plurality of second virtual lines 24b, or may be arranged in a dot pattern.

As shown in FIG. 8, non-squeezed portions 25 are formed at positions corresponding to grid points (intersections of a plurality of first virtual lines 24a and a plurality of second virtual lines 24b) of the grid pattern 24. there is The non-pressed portion 25 is a portion that is not substantially subjected to pressing such as embossing. Therefore, in the thickness direction Z, the surface 14 of the skin surface side Z1 of the non-squeezed portion 25 is arranged between the surface convex portion 16a of the first embossed portion 16 and the surface concave portion 18a of the second embossed portion 18, and is not compressed. The back surface 15 of the non-skin surface side Z2 of the portion 25 is arranged between the back concave portion 16b of the first embossed portion 16 and the back convex portion 18b of the second embossed portion 18 .

By arranging the second embossed portions 18 along the lattice pattern 24 as described above, a plurality of absorbent regions 30 are formed in the absorbent body 13 . The plurality of absorbent regions 30 are regions defined by the grid-like pattern 24, and are two-dimensionally arranged over substantially the entire area of the absorbent body 13 when viewed from the skin surface side Z1. That is, the absorbent region 30 is a region surrounded by the second embossed portions 18 . The plurality of absorbent regions 30 are arranged at intervals in a direction intersecting the longitudinal direction Y, for example, in the width direction X, or in an oblique direction intersecting the width direction X and the longitudinal direction Y. In the example shown in FIG. 8 , the plurality of absorbent regions 30 are two-dimensionally arranged in the width direction X, the longitudinal direction Y, and the diagonal direction of the absorbent body 13 . The maximum width in the width direction X of at least one absorbent region 30 among the plurality of absorbent regions 30 may be larger than the maximum width in the longitudinal direction Y of the absorbent region 30 . For example, in the example shown in FIG. 8 , each of the plurality of absorbent regions 30 has a rhombic shape with long sides extending in the width direction X and short sides extending in the longitudinal direction Y. As shown in FIG. The absorbent region 30 may have a vertically long rhombic shape with long sides extending in the longitudinal direction Y and short sides extending in the width direction X, or may be circular, elliptical, polygonal, or the like. , may have a shape other than a rhombus.

In one embodiment, a plurality of first embossed portions 16 are formed inside the plurality of absorbent regions 30 . Therefore, the plurality of absorbent regions 30 protrude to the skin surface side Z1. In other words, at least a portion of the plurality of absorbent regions 30 are configured by the plurality of first embossed portions 16 . The plurality of absorbent regions 30 absorb urine excreted from the wearer by the pulp fibers and superabsorbent polymer contained in the first embossed portion 16 . As shown in FIG. 8 , each of the plurality of absorbent regions 30 includes a central region 36 and a peripheral region 37 arranged to surround the central region 36 . A central region 36 is a generally circular region located near the center of each absorbent region 30 . The peripheral region 37 is a substantially annular region arranged on the periphery of the absorbent region 30 . For example, the central portion of the first embossed portion 16 is arranged in the central region 36 and the peripheral portion of the first embossed portion 16 is arranged in the peripheral region 37 .

The density of the superabsorbent polymer present in the central region 36 is lower than the density of the superabsorbent polymer present in the peripheral region 37 . For example, the percentage of pulp fibers in the central region 36 is higher than the percentage of pulp fibers in the peripheral region 37, and the percentage of superabsorbent polymer in the central region 36 is higher than the percentage of superabsorbent polymer in the peripheral region 37. is also lower. For example, the density of the superabsorbent polymer present in the peripheral region 37 may be set 10% or more higher than the density of the superabsorbent polymer present in the central region 36 . Since the central region 36 contains a high proportion of pulp fibers, the water absorption rate of the central region 36 is higher than that of the peripheral region 37 . On the other hand, since the peripheral region 37 contains a high water-absorbent polymer, the maximum water absorption of the peripheral region 37 is higher than the maximum water absorption of the central region 36 . The density of the superabsorbent polymer represents the average number of superabsorbent polymers per unit area of the absorbent body 13 .

In the absorber 13 described above, urine excreted from the wearer is supplied to the plurality of absorption regions 30 and is quickly absorbed in the central region 36 having a high water absorption rate. Urine absorbed in the central region 36 is diffused in the thickness direction Z of the absorbent body 13 . Urine that has not been absorbed in the central region 36 is absorbed by the peripheral region 37 . At this time, since the peripheral region 37 contains the superabsorbent polymer at a high density, it can absorb a large amount of urine. Here, the superabsorbent polymer has the property that the water permeability decreases as the water absorption increases. Therefore, as the amount of urine absorbed in the peripheral region 37 increases, the permeability of the peripheral region 37 decreases until a less permeable barrier is formed around the central region 36 . The barrier is a region in which water permeability is lower than that of other portions of the absorbent body 13, and has an annular shape when viewed from the skin surface side Z1.

When a barrier with low water permeability is formed around the central region 36, the flow of urine in the longitudinal direction Y indicated by arrow D1 in FIG. spread over X. The urine spread out in the width direction X is absorbed by the surrounding absorbent regions 30 having a relatively low water absorption capacity. As described above, each of the plurality of absorbent regions 30 includes a central region 36 and a peripheral region 37 to allow urine to diffuse throughout the absorbent body 13 . Therefore, it is possible to absorb urine with the entire absorbent body 13 , and for example, urine leakage from the ends of the absorbent body 13 in the longitudinal direction Y can be suppressed.

As described above, the density of the superabsorbent polymer present in the central region 36 is lower than the density of the superabsorbent polymer present in the peripheral region 37, but the density present in the intermediate layer 28 of the central region 36 The density of the superabsorbent polymer present in the peripheral region 37 may be higher than the density of the superabsorbent polymer present in the intermediate layer 28 in the peripheral region 37 .

Next, the dimensions of the first embossed portion 16 and the second embossed portion 18 will be described in detail with reference to FIG. BW1 in FIG. 7 represents the depth of the surface void 20, and BW2 in FIG. 7 represents the depth of the back surface void 21. FIG. That is, the depth BW1 of the surface void 20 corresponds to the distance in the thickness direction Z between the surface convex portion 16a of the first embossed portion 16 and the surface concave portion 18a of the second embossed portion 18, and the depth BW2 of the back surface void 21 is , corresponds to the distance in the thickness direction Z between the rear concave portion 16 b of the first embossed portion 16 and the rear convex portion 18 b of the second embossed portion 18 .

In addition, T1 in FIG. 7 represents the thickness of the first embossed portion 16, and T2 in FIG. 7 represents the thickness of the second embossed portion 18. The thickness T1 of the first embossed portion 16 corresponds to the distance in the thickness direction Z between the front convex portion 16a and the rear concave portion 16b of the first embossed portion 16, and the thickness T2 of the second embossed portion 18 corresponds to the thickness of the second embossed portion 18. corresponds to the distance in the thickness direction Z between the front surface concave portion 18a and the rear surface convex portion 18b. T3 in FIG. 7 represents the thickness of the absorbent body 13 . The thickness T3 of the absorbent body 13 corresponds to the distance in the thickness direction Z between the front convex portion 16 a of the first embossed portion 16 and the rear convex portion 18 b of the second embossed portion 18 .

The thickness T3 of the absorbent body 13 is smaller than the sum of the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 . In addition, the sum of the thickness T1 of the first embossed portion 16 and the depth BW2 of the back surface void 21 is set to be approximately the same as the sum of the thickness T2 of the second embossed portion 18 and the depth BW1 of the surface void 20. . For example, the difference between the sum of the thickness T1 of the first embossed portion 16 and the depth BW2 of the back surface gap 21 and the sum of the thickness T2 of the second embossed portion 18 and the depth BW1 of the surface gap 20 |(T1+BW2)− (T2+BW1)| may be 50% or less, 40% or less, 30% or less, 20% or less, or 10% or less with respect to the thickness T3 of the absorbent body 13 .

The thickness T1 of the first embossed portion 16 may be larger or smaller than the thickness T2 of the second embossed portion 18. However, in the absorbent body 13, the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is set small. For example, the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is 50% or less, 40% or less, 30% or less, 20% or less with respect to the thickness T1 of the first embossed portion, or , 10% or less. By thus reducing the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18, BW1>|T1-T2| That is, the depth BW1 of the surface void 20 is set larger than the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 .

If there is a difference in thickness in the absorber 13, the load may be concentrated on a portion with a small thickness, causing the absorber 13 to bend. On the other hand, in the absorbent body 13, since the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is small, the shape of the absorbent body 13 can be easily maintained. Moreover, since non-uniformity in the density of the absorbent body 13 is suppressed, urine can be absorbed in the entire absorbent body 13 with high uniformity. Furthermore, in the absorbent body 13, by increasing the depth BW1 of the surface voids 20, the voids formed between the wearer's skin surface and the surface 14 of the absorbent body 13 can be increased. As a result, a clear shadow of the surface voids 20 is formed on the surface 14 of the absorbent body 13, and the air permeability of the absorbent body 13 is improved.

The depth BW1 of the surface void 20 and the depth BW2 of the back surface void 21 may be approximately the same depth. For example, the difference |BW1-BW2| It may be 20% or less, or 10% or less. In one embodiment, depth BW1 of surface air gap 20 may be greater than depth BW2 of back surface air gap 21 . When the depth BW1 of the surface voids 20 is greater than the depth BW2 of the back surface voids 21, the breathability of the absorbent body 13 is improved. Note that the depth BW1 of the surface gap 20 may be smaller than the depth BW2 of the backside gap 21 .

The thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 may differ depending on the position in the width direction X of the absorbent body 13 . For example, as shown in FIGS. 5 and 6, the absorbent body 13 has a central portion 45 arranged substantially in the center in the width direction X and both side portions 46 arranged on both sides of the central portion 45 in the width direction X. Including, the first embossed portion 16 and the second embossed portion 18 are formed in the central portion 45 and the side portions 46 . At this time, the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 of the central portion 45 are different from the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 of the side portions 46. may For example, the thickness T1 of the first embossed portions 16 in the central portion 45 may be greater than the thickness T1 of the first embossed portions 16 formed in the side portions 46 . Also, the thickness T2 of the second embossed portions 18 of the central portion 45 may be greater than the thickness T2 of the second embossed portions 18 of the side portions 46 . Note that the thickness T1 of the first embossed portions 16 of the central portion 45 may be smaller than the thickness T1 of the first embossed portions 16 formed on both side portions 46, and the thickness T2 of the second embossed portions 18 of the central portion 45 may be smaller than the thickness T2 of the second embossed portion 18 on both side portions 46 . Also, the thickness T1 of the first embossed portions 16 of the central portion 45 may be greater than the thickness T2 of the second embossed portions 18 of the central portion 45 .

Accordingly, the difference |T1-T2| For example, the difference between the thickness T1 of the first embossed portion 16 of the central portion 45 and the thickness T2 of the second embossed portion 18 of the central portion 45 is the thickness T1 of the first embossed portion 16 of the side portions 46 and the thickness T2 It may be larger than the difference from the thickness T2 of the second embossed portion 18 . By increasing the difference between the thickness T1 of the first embossed portion 16 of the central portion 45 and the thickness T2 of the second embossed portion 18 of the central portion 45, the thick portion of the central portion 45 absorbs urine at a high absorption rate. can do. On the other hand, by reducing the difference between the thickness T1 of the first embossed portions 16 of the side portions 46 and the thickness T2 of the second embossed portions 18 of the side portions 46, urine of the wearer can be absorbed with high uniformity. . Therefore, the central portion 45 near the wearer's urination opening can absorb urine at a high absorption rate, and the side portions 46 arranged around the wearer's legs can facilitate the diffusion of urine.

W1 in FIG. 7 represents the width of the rear recessed portion 16b of the first embossed portion 16, and W2 in FIG. 7 represents the width of the surface recessed portion 18a of the second embossed portion 18. W3 in FIG. 7 represents the distance between the rear recesses 16b of the adjacent first embossed portions 16 among the plurality of first embossed portions 16, and W4 in FIG. It represents the distance between the surface recesses 18a. Note that the width W1 of the rear recessed portion 16b, the width W2 of the front recessed portion 18a, the distance W3 between adjacent rear recessed portions 16b, and the distance W4 between adjacent front recessed portions 18a are defined by the first virtual line 24a or the second virtual line 24b. 5 represents the width or distance when viewed from a cross section (a cross section along line VII-VII in FIG. 5) along a direction (predetermined direction) parallel to . As shown in FIG. 7, in the absorber 13, the distance W3 between the adjacent back recesses 16b is set larger than the width W2 of the front recesses 18a. Also, the distance W4 between the adjacent front surface recesses 18a is set larger than the width W1 of the rear surface recesses 16b.

As described above, in the absorbent article 1, the surface convex portion 16a of the first embossed portion 16 protrudes toward the skin side Z1, and the surface concave portion 18a of the second embossed portion 18 is recessed toward the non-skin side Z2. , the height of the surface convex portion 16a of the first embossed portion 16 relative to the surface concave portion 18a of the second embossed portion 18 can be increased. Therefore, the depth BW1 of the surface void 20 formed between the wearer's skin surface and the surface recessed portion 18a of the second embossed portion 18 can be increased without increasing the thickness T3 of the absorbent body 13. Therefore, it is possible to both reduce the thickness of the absorbent body 13 and improve the breathability.

In addition, in the absorbent article 1, the difference between the thickness T1 of the first embossed portion and the thickness T2 of the second embossed portion is reduced while the depth BW1 of the surface voids 20 is increased. It is possible to form clear shadows of the surface recessed portions 18a on the surface of the absorbent body while suppressing the absorption property. In particular, the absorbent article 1 includes a pair of stretchable members 71 extending in the longitudinal direction Y, a plurality of stretchable members 33 extending in the width direction X so as to cross the absorbent body 13, and A plurality of elastic members 43 extending in the width direction X are provided as follows. The elastic member 71, the elastic member 33, and the elastic member 43 are contracted, and the absorber 13 is contracted in the width direction X and the longitudinal direction Y, so that the shadow of the surface concave portion 18a can be further clarified.

In addition, since the absorbent article 1 does not have a portion where the thickness of the absorbent body 13 is locally reduced, the absorbent body 13 is less likely to be torn. Therefore, the superabsorbent polymer contained in the absorbent body 13 is prevented from leaking out and adhering to the wearer. Furthermore, in the absorber 13 described above, the body pressure of the wearer is applied from the skin surface side Z1, so that the uneven shape of the absorber 13 is evened out, and when the body pressure is relieved, a restoring force is generated to absorb. The uneven shape of the body 13 is restored. At this time, air circulation occurs inside and outside the absorbent body 13, and the moisture inside the absorbent article 1 is released to the outside. This further enhances the breathability of the absorbent body 13 .

Further, in the absorbent article 1, at least one of the plurality of vent holes 74 overlaps the first embossed portion 16 and the second embossed portion 18 of the absorbent body 13 when viewed from the skin side Z1. , the moisture in the surface recessed portion 18a and the moisture absorbed in the first embossed portion 16 can be released to the outside through the plurality of air holes 74. As shown in FIG. Therefore, the breathability of the absorbent article 1 can be further improved.

Although the absorbent articles according to various embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without changing the gist of the invention. That is, it should be noted that the above-described embodiments are for illustrative purposes and are not intended to limit the scope of the invention.

For example, in the example shown in FIG. 5, a plurality of first embossed portions 16 and second embossed portions 18 are formed substantially throughout the absorbent body 13, but the plurality of first embossed portions 16 and second embossed portions 18 are It may be formed only on a part of the absorbent body 13 . For example, as shown in FIG. 9 , the absorber 13 has a ventral portion 51 located on one end side in the longitudinal direction Y, a dorsal portion 52 located on the other end side in the longitudinal direction Y, and an ventral portion 51 . The plurality of first embossed portions 16 and second embossed portions 18 may be formed only in the intermediate portion 53 of the absorbent body 13 , including the intermediate portion 53 positioned between the dorsal portion 52 .

Also, as shown in FIG. 9, a plurality of end embossed portions 55 may be formed on the ventral portion 51 and the dorsal portion 52 . The plurality of end embossed portions 55 are portions compressed toward the skin surface side Z1 or the non-skin surface side Z2 by being embossed. The plurality of end embossed portions 55 are formed at intervals in the longitudinal direction Y and extend in a wavy line between both ends in the width direction X of the ventral portion 51 and the dorsal portion 52 . The plurality of end embossed portions 55 block the flow of urine reaching the abdominal portion 51 and the dorsal portion 52 in the longitudinal direction Y, thereby suppressing urine leakage from the ends in the longitudinal direction Y of the absorber 13. . Note that the plurality of end embossed portions 55 may be formed only on one of the ventral portion 51 and the dorsal portion 52 . At least one end embossed portion 55 may be formed in the absorbent body 13 .

In addition, as shown in FIG. 9, the absorbent body 13 may further include non-absorbent regions 62 that do not contain pulp fibers and superabsorbent polymers. The non-absorbent regions 62 are formed in the ventral portion 51 and the dorsal portion 52 . More specifically, the non-absorbent region 62 is positioned closer to one end in the longitudinal direction Y of the absorber 13 than the boundary between the abdominal portion 51 and the intermediate portion 53 and closer than the boundary between the dorsal portion 52 and the intermediate portion 53. It is arranged on at least one of the other ends in the longitudinal direction of the absorber 13 . For example, the non-absorbent region 62 is formed in substantially the entire width direction X of the absorbent body 13 , and the basis weight of the non-absorbent region 62 is one end side in the longitudinal direction Y of the absorbent body 13 or one end of the absorbent body 13 . It decreases as it approaches the other end side in the longitudinal direction. Accordingly, the thicknesses of the abdominal portion 51 and the dorsal portion 52 become thinner toward the one end side and the other end side of the longitudinal direction Y of the absorber 13 . Therefore, the average thickness of the ventral portion 51 and the dorsal portion 52 is smaller than the average thickness of the intermediate portion 53 .

Furthermore, in the embodiment shown in FIG. 7, the back recessed portion 16b of the first embossed portion 16 is arranged on the non-skin surface side Z2 from the surface recessed portion 18a of the second embossed portion 18, but as shown in FIG. , the rear surface recessed portion 16b of the first embossed portion 16 may be arranged closer to the skin surface side Z1 than the surface recessed portion 18a of the second embossed portion 18. The depth BW1 of the surface void 20 can be increased by arranging the back surface recess 16b closer to the skin surface side Z1 than the surface recess 18a, and as a result, the breathability of the absorbent article 1 can be improved. .

Also, in the embodiment shown in FIG. 8, the second embossed portions 18 are intermittently formed along the lattice pattern 24, but the second embossed portions 18 may be formed continuously. For example, as shown in FIG. 11( a ), the non-squeezed portions 25 may not be formed on the absorbent body 13 and the second embossed portions 18 may be formed continuously along a lattice pattern. In another embodiment, as shown in FIG. 11(b), the second embossed portion 18 may extend in a wavy line or curved line. Note that the absorbent body 13 does not necessarily have to include a plurality of first embossed portions 16 , and may include at least one first embossed portion 16 .

Also, in the above-described embodiment, the plurality of absorbent regions 30 protrude to the skin surface side Z1, but a part of the plurality of absorbent regions 30 may protrude to the non-skin surface side Z2. The various embodiments described above can be arbitrarily combined within a consistent range.

DESCRIPTION OF SYMBOLS 1... Absorbent article 11... Top sheet 13... Absorbent body 16... 1st embossed part 16a... Surface convex part 16b... Back concave part 18... Second embossed part 18a... Surface concave part 18b... Back convex part Section 22 Cushion sheet 24 Pattern 26 First absorbent layer 27 Second absorbent layer 28 Intermediate layer 30 Absorbent area 36 Central area 37 Peripheral area 74 Air hole Z1: skin side, Z2: non-skin side.

Claims

An absorbent article having a longitudinal direction connecting the abdominal side and the dorsal side of a wearer and a width direction orthogonal to the longitudinal direction,
One or a plurality of first embossed portions including surface protrusions protruding toward the wearer's skin side and back recesses recessed toward the wearer's skin side, and surface recesses recessed toward the non-skin side of the wearer. An absorbent body including a second embossed portion including a rear convex portion protruding to the non-skin surface side,
The absorbent article, wherein the back recessed portion of the first embossed portion and the front recessed portion of the second embossed portion are formed at positions shifted from each other when viewed from the skin surface side.
The absorbent article according to claim 1, wherein the back recessed portion of the first embossed portion is arranged closer to the non-skin surface than the surface recessed portion of the second embossed portion.
The absorbent article according to claim 1, wherein the back recessed portion of the first embossed portion is arranged closer to the skin than the surface recessed portion of the second embossed portion.
The absorbent body includes a plurality of the first embossed portions,
The absorbent article according to any one of claims 1 to 3, wherein the plurality of first embossed portions are arranged at intervals in the width direction.
The absorbent article according to claim 4, wherein the plurality of first embossed portions are arranged at intervals in the longitudinal direction.
The absorbent article according to claim 4 or 5, wherein the second embossed portions are arranged between the plurality of first embossed portions.
The total area of the plurality of first embossed portions viewed from the skin surface side is larger than the area of the second embossed portions viewed from the skin surface side, according to any one of claims 4 to 6. absorbent article.
The second embossed portion is formed along a grid-like pattern when viewed from the skin surface side,
The absorbent article according to any one of claims 4 to 7, wherein said plurality of first embossed portions are formed within a plurality of absorbent regions defined by said second embossed portions.
The absorbent article according to claim 8, wherein the maximum width in the width direction of at least one absorbent region among the plurality of absorbent regions is greater than the maximum width in the longitudinal direction of the one absorbent region.
The absorbent body contains a super absorbent polymer,
each of the plurality of absorbent regions of the absorber includes a central region and a peripheral region surrounding the central region;
10. The absorbent article according to claim 8 or 9, wherein the density of the superabsorbent polymer present in the central region is lower than the density of the superabsorbent polymer present in the peripheral region.
The absorbent body includes a first absorbent layer positioned on the skin side, a second absorbent layer positioned on the non-skin side, and an intermediate absorbent layer positioned between the first absorbent layer and the second absorbent layer. having a multi-layer structure containing layers,
The absorbent article according to any one of claims 8 to 10, wherein said first absorbent layer, said second absorbent layer and said intermediate layer comprise a superabsorbent polymer.
each of the plurality of absorbent regions of the absorber includes a central region and a peripheral region surrounding the central region;
The absorbent body includes a first absorbent layer positioned on the skin side, a second absorbent layer positioned on the non-skin side, and an intermediate absorbent layer positioned between the first absorbent layer and the second absorbent layer. having a multi-layer structure containing layers,
The first absorbent layer, the second absorbent layer and the intermediate layer comprise a superabsorbent polymer,
11. Any one of claims 8 to 10, wherein the density of the superabsorbent polymer present in the intermediate layer in the central region is higher than the density of the superabsorbent polymer present in the intermediate layer in the peripheral region. Absorbent article according to.
further comprising a top sheet arranged on the skin surface side of the absorbent body,
A plurality of ventilation holes are formed in the top sheet,
13. The absorbent article according to any one of claims 1 to 12, wherein at least one of the plurality of vent holes overlaps the second embossed portion when viewed from the skin surface side.
further comprising a top sheet arranged on the skin surface side of the absorbent body,
A plurality of ventilation holes are formed in the top sheet,
13. The absorbent article according to any one of claims 1 to 12, wherein at least one of the plurality of vent holes overlaps the first embossed portion when viewed from the skin surface side.
The absorbent article according to claim 13 or 14, further comprising a cushion sheet provided between said top sheet and said absorbent body and having a rigidity higher than that of said top sheet.
16. The absorbent article according to claim 15, wherein at least part of said cushion sheet has a tapered shape that narrows in said width direction as it approaches said longitudinal end.