pad

Abstract

The present invention provides a pad that can prevent the diffusibility of liquid from being reduced, maintains the shape of multiple convex parts protruding on the front sheet, and is formed into a state of being folded into three in the front-to-back direction. The subject of the present invention is solved by the following scheme: when viewed from above, the left front side of the front side extends to the left side compared with the left narrowing edge of the narrowest width part of the narrowing part, and the right front side of the front side extends to the right side compared with the right narrowing edge of the narrowest width part of the narrowing part, when viewed from above, the left rear side of the rear side extends to the left side compared with the left narrowing edge of the narrowest width part of the narrowing part, and the right rear side of the rear side extends to the right side compared with the right narrowing edge of the narrowest width part of the narrowing part, the left front side and the left rear side are bent inwardly with the first left bending line extending in the front-to-back direction and arranged close to the left side of the left narrowing edge as the center, and the right front side and the right rear side are bent inwardly with the first right bending line extending in the front-to-back direction and arranged close to the right side of the right narrowing edge as the center.

Description

Technical Field

[0001] The present invention relates to a pad to be attached to a belt-type disposable diaper, and more particularly to a pad formed in a state of being folded into three in the front-back direction in order to maintain a convex portion protrudingly formed on a front sheet. Background Art

[0002] In the past, the following scheme has been proposed: on the front sheet, a convex portion for improving the diffusion of excreted urine is formed on the inner surface, the left side of the absorbent body is bent inwardly with the left imaginary line dividing the left side of the absorbent body into two in the width direction as the center, the right side of the absorbent body is bent inwardly with the right imaginary line dividing the right side of the absorbent body into two in the width direction as the center, then the front side of the absorbent body is bent inwardly with the front side imaginary line dividing the absorbent body into three in the front-to-back direction as the center, and then the rear side of the absorbent body is bent inwardly with the rear side imaginary line dividing the absorbent body into three in the front-to-back direction as the center. (Patent Document 1)

[0003] In order to prevent the diffusibility of the liquid from being reduced, a proposal has been made to form convex portions on the inner surface of the front sheet at predetermined intervals in the width direction. (Patent Document 2)

[0004] Patent Document 1: Japanese Patent Application Publication No. 2015-157047

[0005] Patent Document 2: Japanese Patent Application Publication No. 2004-174234

[0006] However, in the solution of Patent Document 1, the left and right sides of the absorbent body that are bent toward the center of the width direction of the absorbent body overlap, so a large number of convex parts formed at the portion of the front sheet that is opposite to the center of the width direction of the absorbent body may not be able to maintain their shape due to the pressure of the left and right sides of the absorbent body. In addition, Patent Document 2 does not disclose the means for bending the pad. Summary of the invention

[0007] Therefore, an object of the present invention is to provide a pad that can prevent a decrease in the diffusibility of liquid, maintains the shapes of a plurality of convex portions protruding from a surface sheet, and is folded into three in the front-back direction.

[0008] Means for solving the above-mentioned problems are as follows.

[0009] The first scheme is a pad, which comprises: a liquid-permeable front sheet; a liquid-impermeable back sheet; and an absorbent body arranged between the front sheet and the back sheet, characterized in that a protruding convex portion is formed on the front sheet, and the absorbent body is formed by the following parts: a front side portion located on the front side in the front-to-back direction; a narrowed portion located in the central portion in the front-to-back direction; and a rear side portion located on the rear side in the front-to-back direction, when viewed from above, the left front side portion of the front side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, the right front side portion of the front side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, when viewed from above, the left rear side portion of the rear side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right rear side portion of the rear side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, and the left front side portion and the left rear side portion are provided with a first left bending line extending in the front-to-back direction close to the left side of the left narrowed edge. The right front side portion and the right rear side portion are bent inwardly with a first right bending line extending in the front-to-back direction and arranged on the right side close to the right side of the right narrowed edge as the center, and when viewed from above, a second bending line extending in the width direction is arranged at a front position of the position where the absorbent body is divided into three parts in the front-to-back direction, and a third bending line extending in the width direction is arranged at a rear position of the position where the absorbent body is divided into three parts in the front-to-back direction. Line, after the front side portion in the state where the left front side portion and the right front side portion are bent is bent inwardly with the second bending line as the center, or the rear side portion in the state where the left rear side portion and the right rear side portion are bent is bent inwardly with the third bending line as the center, the rear side portion in the state where the left rear side portion and the right rear side portion are bent is bent inwardly with the third bending line as the center, or the front side portion in the state where the left front side portion and the right front side portion are bent is bent inwardly with the second bending line as the center.

[0010] The second scheme is a pad, which comprises: a liquid-permeable front sheet; a liquid-impermeable back sheet; and an absorbent body arranged between the front sheet and the back sheet, characterized in that a protruding convex portion is formed on the front sheet, and the absorbent body is formed by the following parts: a front side portion located on the front side in the front-to-back direction; a narrowed portion located in the central portion in the front-to-back direction; and a rear side portion located on the rear side in the front-to-back direction, when viewed from above, the left front side portion of the front side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, the right front side portion of the front side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, when viewed from above, the left rear side portion of the rear side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right rear side portion of the rear side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, and the left front side portion and the left rear side portion are centered on a first left bending line extending in the front-to-back direction and arranged close to the left side of the left narrowed edge. The right front side portion and the right rear side portion are bent inwardly with a first right bending line extending in the front-to-back direction and arranged on the right side close to the right side of the right narrowed edge as the center. When viewed from above, a second bending line extending in the width direction is arranged at a front position of the position where the absorbent body is divided into three parts in the front-to-back direction, and a third bending line extending in the width direction is arranged at a rear position of the position where the absorbent body is divided into three parts in the front-to-back direction. The front side portion with the left front side portion and the right front side portion bent is bent inwardly with the second bending line as the center, the left front side portion is arranged on the inner side of the first left rear side portion extending on the front side compared with the third bending line in the left rear side portion, and the right front side portion is arranged on the inner side of the first right rear side portion extending on the front side compared with the third bending line in the right rear side portion, and then, the rear side portion with the left rear side portion and the right rear side portion bent is bent inwardly with the third bending line as the center.

[0011] The third aspect is characterized in that, in the structure of the first or second aspect, the first left bending line is located on the left narrowed side, and the first right bending line is located on the right narrowed side.

[0012] The fourth scheme is characterized in that, in the structure of the first or second scheme, a rectangular first left front overlapping portion and a rectangular first right front overlapping portion are respectively provided at a portion in the front part of the front side portion that overlaps with the first left bending line and the first right bending line, and a triangular second left rear overlapping portion having a top on the front side and a triangular second right rear overlapping portion having a top on the front side are respectively provided at a portion in the front part of the rear side portion that overlaps with the first left bending line and the first right bending line, and the second left rear overlapping portion and the second right rear overlapping portion extend to the front side of the third bending line, respectively.

[0013] The fifth scheme is characterized in that, in the structure of the first or second scheme, a rectangular third left center overlapping portion and a rectangular third right center overlapping portion are respectively provided at the portions overlapping with the second bending line in the two side portions of the narrowing portion, and a triangular second left rear overlapping portion having a top on the front side and a triangular second right rear overlapping portion having a top on the front side are respectively provided at the portions overlapping with the first left bending line and the first right bending line in the front portion of the rear side portion, and the second left rear overlapping portion and the second right rear overlapping portion extend to the front side of the third bending line, respectively.

[0014] According to the first scheme, a protruding convex portion is formed on the front sheet, and the absorbent body is formed by the following parts: a front side portion located on the front side in the front-to-back direction; a narrowed portion located in the central portion in the front-to-back direction; and a rear side portion located on the rear side in the front-to-back direction, when viewed from above, the left front side portion of the front side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right front side portion of the front side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, when viewed from above, the left rear side portion of the rear side portion extends to the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right rear side portion of the rear side portion extends to the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, the left front side portion and the left rear side portion are bent inwardly around a first left bending line extending in the front-to-back direction and arranged on the left side close to the left side of the left narrowed edge, and the right front side portion and the right rear side portion are bent inwardly around a first right bending line extending in the front-to-back direction and arranged on the right side close to the right side of the right narrowed edge. In a plan view, a second bending line extending in the width direction is provided at the front position of the position where the absorbent body is divided into three parts in the front-back direction, and a third bending line extending in the width direction is provided at the rear position. When the front side portion is bent with the left front side portion and the right front side portion folded, it is bent inwardly with the second bending line as the center, or when the rear side portion is bent with the left rear side portion and the right rear side portion folded, it is bent inwardly with the third bending line as the center. The rear side portion is bent inwardly with the third bending line as the center when the side portion is bent, or the front side portion is bent inwardly with the second bending line as the center when the left front side portion and the right front side portion are bent. Therefore, a space is formed between the inner surface of the narrowed portion and the inner surface of the rear side portion, and between the outer surface of the rear side portion and the inner surface of the front side portion, thereby maintaining the shape of the convex portion protruding inwardly of the front sheet opposite to the front side portion, the narrowed portion, and the rear side portion, thereby preventing the diffusibility of the liquid from being reduced.

[0015] According to the second scheme, on the basis of the effect of the first scheme, a protruding convex portion is formed on the front sheet, and the absorbent body is formed by the following parts: a front side portion located on the front side in the front-to-back direction; a narrowed portion located in the central portion in the front-to-back direction; and a rear side portion located on the rear side in the front-to-back direction, wherein, when viewed from above, the left front side portion of the front side portion extends on the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right front side portion of the front side portion extends on the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, and when viewed from above, the left rear side portion of the rear side portion extends on the left side compared with the left narrowed edge of the narrowest width portion of the narrowed portion, and the right rear side portion of the rear side portion extends on the right side compared with the right narrowed edge of the narrowest width portion of the narrowed portion, the left front side portion and the left rear side portion are bent inwardly around the first left bending line extending in the front-to-back direction and arranged on the left side close to the left side of the left narrowed edge, and the right front side portion and the right rear side portion are bent inwardly around the first left bending line extending in the front-to-back direction and arranged on ... The absorbent body is bent inwardly with the first right bending line extending in the front-to-back direction provided on the right side near the right narrowing edge as the center. When viewed from above, a second bending line extending in the width direction is provided at the front position of the position where the absorbent body is divided into three parts in the front-to-back direction, and a third bending line extending in the width direction is provided at the rear position. The front side portion in a state where the left front side portion and the right front side portion are bent is bent inwardly with the second bending line as the center, the left front side portion is arranged on the inner side of the first left rear side portion extending forwardly compared with the third bending line in the left rear side portion, and the right front side portion is arranged on the inner side of the first right rear side portion extending forwardly compared with the third bending line in the right rear side portion, and then, the rear side portion in a state where the left rear side portion and the right rear side portion are bent is bent inwardly with the third bending line as the center, thereby forming a larger space between the inner surface of the narrowing portion and the inner surface of the front side portion. Thus, the convex portion protruding inward of the front sheet opposite to the front side portion is not pressed by the narrowing portion. In addition, the convex portion protruding inward of the front sheet opposite to the narrowing portion is not pressed by the front side portion, thereby maintaining the shape of the convex portion protruding inward of the front sheet opposite to the front side portion and the narrowing portion, preventing the diffusibility of the liquid from being reduced.

[0016] According to the third scheme, on the basis of the effects of the first or second scheme, since the first left bending line is located on the left narrowing edge and the first right bending line is located on the right narrowing edge, the left front side portion of the front side portion and the left rear side portion of the rear side portion can be efficiently bent inward along the first left bending line, and the right front side portion of the front side portion and the right rear side portion of the rear side portion can be efficiently bent inward along the first right bending line.

[0017] According to the fourth scheme, on the basis of the effects of the first or second scheme, a rectangular first left front overlapping portion and a rectangular first right front overlapping portion are respectively provided at a portion in the front part of the front side portion that overlaps with the first left bending line and the first right bending line, and a triangular second left rear overlapping portion having a top on the front side and a triangular second right rear overlapping portion having a top on the front side are respectively provided at a portion in the front part of the rear side portion that overlaps with the first left bending line and the first right bending line, the second left rear overlapping portion and the second right rear overlapping portion respectively extend to the front side of the third bending line, so that a larger space is formed between the inner surface of the narrowed portion and the inner surface of the front side portion. Thus, the convex portion protruding inward of the front sheet opposite to the front side portion is not pressed by the narrowing portion. In addition, the convex portion protruding inward of the front sheet opposite to the narrowing portion is not pressed by the front side portion, thereby further maintaining the shape of the convex portion protruding inward of the front sheet opposite to the front side portion and the narrowing portion, further preventing the diffusibility of the liquid from being reduced.

[0018] According to the fifth scheme, on the basis of the effects of the first or second scheme, a rectangular third left center overlapping portion and a rectangular second right center overlapping portion are respectively provided at portions overlapping with the third bending line in both side portions of the narrowing portion, and a triangular second left rear overlapping portion having a top on the front side and a triangular second right rear overlapping portion having a top on the front side are respectively provided at portions overlapping with the first left bending line and the first right bending line in the front portion of the rear side portion, the second left rear overlapping portion and the second right rear overlapping portion respectively extend to the front side of the third bending line, so that a larger space is formed between the inner surface of the narrowing portion and the inner surface of the front side portion. Thus, the convex portion protruding inward of the front sheet opposite to the front side portion is not pressed by the narrowing portion. In addition, the convex portion protruding inward of the front sheet opposite to the narrowing portion is not pressed by the front side portion, thereby further maintaining the shape of the convex portion protruding inward of the front sheet opposite to the front side portion and the narrowing portion, further preventing the diffusibility of the liquid from being reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a plan view showing the inner surface of the pad in the unfolded state.

[0020] Figure 2 It is a top view showing only important parts.

[0021] Figure 3 is along Figure 1 Cross-sectional view along line AA.

[0022] Figure 4 is along Figure 1 Cross-sectional view of line BB.

[0023] Figure 5 It is a cross-sectional view of the convex portion of the front sheet.

[0024] Figure 6 It is a top view of the convex part of the front sheet.

[0025] Figure 7 It is a top view of the outer absorbent body in the unfolded state.

[0026] Figure 8 This is a plan view of a state where both side portions of the outer absorbent body are folded inward.

[0027] Fig. 9 This is a plan view of a state where the front side portion of the outer absorbent body is folded inward.

[0028] Fig.10 This is a plan view of a state where the rear side portion of the outer absorbent body is folded inward.

[0029] Fig.11 along Fig.10 Cross-sectional view along line AA.

[0030] Fig.12 is along Fig.10 Cross-sectional view of line BB.

[0031] Fig.13 is along Fig.10 Cross-sectional view of the CC line.

[0032] Fig.14 The outer absorbent body is bent inwardly after the rear side portion is folded inwardly and the front side portion of the outer absorbent body is folded inwardly. Fig.10 The cross-sectional view along the CC line is equivalent to the cross-sectional view.

[0033] Fig.15 It is a top view of the outer absorbent core of the second embodiment.

[0034] Fig.16 It is a top view of the outer absorbent core of the third embodiment.

[0035] Description of symbols

[0036] 21: back sheet;

[0037] 22: frontal film;

[0038] 23: absorber;

[0039] 30: anterior lateral part;

[0040] 30A: left anterior lateral part;

[0041] 30B: right anterior lateral part;

[0042] 31: narrowing part;

[0043] 31A: Narrow edge on the left;

[0044] 31B: Narrow edge on the right;

[0045] 32: posterior lateral part;

[0046] 32A: left posterior lateral part;

[0047] 32B: right posterior lateral part;

[0048] 33A: 1st left bending line;

[0049] 33B: 1st right bending line;

[0050] 34: 2nd bending line;

[0051] 35: 3rd bending line;

[0052] 36A: 1st left rear side;

[0053] 36B: 1st right posterior part;

[0054] 41: convex part;

[0055] 50A: 1st left front overlap;

[0056] 50B: 1st right front overlap portion;

[0057] 51A: 2nd left rear overlap;

[0058] 51B: 2nd right rear overlapping part;

[0059] 52A: 3rd left middle overlap;

[0060] 52B: 3rd right middle overlap. DETAILED DESCRIPTION

[0061] like Figures 1 to 4 As shown, the pad of the first embodiment is formed of the following parts: a crotch portion C; a front body portion F extending to the front side of the crotch portion C; and a back body portion B extending to the back side of the crotch portion C. The size of each part can be appropriately determined, for example, the length L of the pad in the front-to-back direction is formed to be 350 to 700 mm, the width W in the width direction is formed to be 130 to 400 mm, the length of the front body portion F in the front-to-back direction is formed to be 50 to 350 mm, the length of the crotch portion C in the front-to-back direction is formed to be 10 to 150 mm, the length of the back body portion B in the front-to-back direction is formed to be 50 to 350 mm, and the minimum width of the crotch portion C is formed to be 200 to 260 cm.

[0062] The pad is formed of a liquid-impermeable back sheet 21 , a liquid-permeable front sheet 22 , an absorbent body 23 disposed between the back sheet 21 and the front sheet 22 , and three-dimensional gathering portions 24 provided on both sides of the front sheet 22 in the width direction.

[0063] The back sheet 21 is arranged outside the absorbent body 23 in a manner that it slightly protrudes from the outer periphery of the absorbent body 23. As the back sheet 21, in addition to polyethylene film, a sheet having moisture permeability without impairing water barrier properties can also be used from the viewpoint of preventing dampness. The water-blocking / moisture-permeable sheet can be a microporous sheet obtained by the following method: an inorganic filler material is melt-kneaded in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretched in a uniaxial or biaxial direction.

[0064] The outer covering sheet 27 made of nonwoven fabric is arranged outside the back sheet 21 in a manner that it slightly protrudes from the outer peripheral edge of the back sheet 21. Various nonwoven fabrics can be used as the outer covering sheet 27. As the fabric fiber constituting the nonwoven fabric, in addition to synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and amides, regenerated fibers such as rayon or cuprammonium fibers, and natural fibers such as cotton can also be used.

[0065] A front sheet 22 is provided on the inner side of the absorbent body 23. In the first embodiment, the width of the front sheet 22 in the width direction is formed to be narrower than the width of the absorbent body 23 in the width direction, but the width of the front sheet 22 in the width direction can also be formed to be wider than the width of the absorbent body 23 in the width direction. As the front sheet 22, a non-woven fabric with or without holes, or a perforated plastic sheet, etc. is used. As the fabric fiber constituting the non-woven fabric, in addition to synthetic fibers such as olefin series, polyester series, amide series, etc. such as polyethylene or polypropylene, regenerated fibers such as artificial fibers or cuprammonium fibers, natural fibers such as cotton, etc. can also be used.

[0066] An intermediate sheet 25 is provided between the surface sheet 22 and the absorber 23. As the intermediate sheet 25, a material having low water retention and high liquid permeability, for example, various nonwoven fabrics or mesh films, can be used.

[0067] Three-dimensional gathering portions 24 are provided on both sides of the front sheet 22 in the width direction, and the three-dimensional gathering portions 24 are formed by the following parts: a fixing portion, which is fixed to the side of the outer sheet 27 in the width direction; and a main body portion, which extends from the fixing portion over the side of the absorbent body 23 and the like in the width direction and to the side of the inner surface of the front sheet 22. In addition, the front and rear end portions of the main body portion in the front-to-back direction are fixed to the front sheet 22, and the central portion of the main body portion in the front-to-back direction is not fixed to the front sheet 22 but stands up toward the inside. And, in Figure 1 The fixing portion of the three-dimensional gathering portion 24 is shown by oblique lines.

[0068] The three-dimensional constricting portion 24 is formed by a two-layer constricting sheet 24A and an elongated elastic member 24B extending in the front-to-back direction. As the material of the constricting sheet 24A, a plastic sheet or a melt-blown nonwoven fabric can be used, but in terms of the touch to the skin, the nonwoven fabric can be hydrophobically treated with silicon or the like. In addition, as the elastic member 24B, commonly used materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene polymer, silicon, polyester, etc. formed into a linear, rope-like, or belt-like shape can be used. And, as Figure 4 As shown, the elastic member 24B uses its stretching force to make the three-dimensional gathering portion 24 stand up toward the inside.

[0069] At the front and rear ends of the pad in the front-to-rear direction, the front sheet 22 and the outer sheet 27 are fixed together to form the end wing EF, and at the two side ends in the width direction of the pad, the gathering sheet 24A and the outer sheet 27 are fixed together to form the side wing SF. In addition, the absorbent body 23 does not extend in the end wing EF and the side wing SF.

[0070] The absorbent body 23 is formed of the following parts: an inner absorbent body 23A located on the body surface side of the wearer, that is, on the inner side; and an outer absorbent body 23B located on the outer side. In addition, as for the inner absorbent body 23A and the outer absorbent body 23B, a material made of a fibrous body of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric as a main body, and a material in which high-absorbent polymer particles in a granular form are mixed and fixed as needed can be used. In addition, in order to prevent the high-absorbent polymer particles from falling off, it is preferable that the inner absorbent body 23A and the outer absorbent body 23B are wrapped with a packaging sheet 26 such as crepe paper.

[0071] The outer absorbent body 23B is formed by a front side portion 30 located in the front body portion F of the pad, a narrowed portion 31 located in the crotch portion C of the pad, and a rear side portion 32 located in the rear body portion B of the pad. The narrowed portion 31 is formed by cutting both side portions of the outer absorbent body 23B located in the width direction of the front side portion 30 and the rear side portion 32 into a substantially trapezoidal shape.

[0072] The minimum width of the narrowed portion 31 is formed to be 50 to 65% of the width W1 of the front side portion 30 and the rear side portion 32. In addition, when the front end of the outer absorbent body 23B is 0% and the rear end of the outer absorbent body 23B is 100%, the front end of the narrowed portion 31 is arranged at 10 to 25%, the rear end of the narrowed portion 31 is arranged at 40 to 65%, and the portion of the narrowed portion 31 that becomes the minimum width is arranged at 25 to 30%.

[0073] The inner absorbent body 23A is formed into a substantially rectangular shape extending in the front-back direction with a predetermined interval in the width direction. The length of the inner absorbent body 23A in the front-back direction is formed to be 60 to 90% of the length L1 of the outer absorbent body 23B in the front-back direction, and the width of the inner absorbent body 23A in the width direction is formed to be 60 to 90% of the width W1 of the outer absorbent body 23B in the width direction. In addition, a pair of substantially rectangular slits 40 are formed at a predetermined interval in the width direction at a portion of the inner absorbent body 23A that is opposite to the narrowed portion 31 of the outer absorbent body 23B, and the slits 40 have a predetermined interval in the width direction and have long sides in the front-back direction.

[0074] like Figure 5 As shown, a plurality of convex portions 41 protruding inward are formed in a staggered manner at predetermined intervals in the front-back direction and the width direction at a portion of the surface sheet 22 that faces the slit 40 of the inner absorbent body 23A.

[0075] Therefore, if Figure 6 As shown, for urine excreted at the urination position Z on the front sheet 21, the urine flows in an oblique direction between the convex portion 41 protruding from the front sheet 21 and the adjacent convex portion 41 compared to flowing in the front-to-back direction or the width direction, so that a large amount of urine excreted to the urination position Z flows into the gap 40 formed on both sides of the urination position Z, thereby suppressing the reduction in the absorbable amount, and at the same time, the fit of the crotch portion C is excellent, and the backflow prevention property is also excellent.

[0076] The convex portion 41 can be formed by pressing the surface sheet 22 from the outside to the inside by embossing. In addition, the shape of the convex portion 41 can be formed into a circular shape, an elliptical shape, or a polygonal shape.

[0077] Next, a method of folding the pad to prevent the convex portion 41 protruding from the front sheet 22 from being crushed is described. Also, for ease of understanding, a method of folding the outer absorbent body 23B after removing the three-dimensional gathering portion 24 of the pad, the front sheet 22, the inner absorbent body 23A, the back sheet 21, etc. is described below.

[0078] like Figure 7 , Figure 8As shown, the left front side portion 30A of the front side portion 30 and the left rear side portion 32A of the rear side portion 32 on the left side of the first left side bending line 33A are bent inwardly with the first left side bending line 33A extending in the front-back direction and located on the left narrowed side 31A as the center, wherein the left narrowed side 31A forms the left end portion with the smallest width in the narrowed portion 31 of the outer absorbent body 23B. Similarly, the right front side portion 30B of the front side portion 30 and the right rear side portion 32B of the rear side portion 32 on the right side of the first right side bending line 33B are bent inwardly with the first right side bending line 33B extending in the front-back direction and located on the right narrowed side 31B as the center, wherein the right side narrowed side 31B forms the right end portion with the smallest width in the narrowed portion 31 of the outer absorbent body 23B. Furthermore, the first left bending line 33A and the first right bending line 33B are collectively referred to as the first bending line 33. In addition, the first left bending line 33A may be set at a position biased from the left narrowing side 31A of the narrowing portion 31 to the left narrowing side 31A in the width direction of the left front side portion 30A, and the first right bending line 33B may be set at a position biased from the right narrowing side 31B of the narrowing portion 31 to the right narrowing side 31B in the width direction of the right front side portion 30B.

[0079] Next, if Figure 8 , Fig. 9 As shown, the front side portion 30 is bent inwardly with the second bending line 34 located on the front side among the second and third bending lines 34, 35 extending in the width direction as the center, wherein the second and third bending lines 34, 35 divide the outer absorbent body 23B roughly into three parts in the front-to-back direction.

[0080] Thus, the outer surface of the left front side portion 30A overlaps with the outer surface of the first left rear side portion 36A extending forward from the third bending line 35 in the left rear side portion 32A, and the outer surface of the right front side portion 30B overlaps with the outer surface of the first right rear side portion 36B extending forward from the third bending line 35 in the right rear side portion 32B. Fig.11 , 12 As shown, a large space S1 is formed between the inner surface of the narrowing portion 31 in the central portion in the width direction and the inner surface of the front side portion 30. Therefore, the protruding convex portion 41 of the front sheet 22 located in the central portion in the width direction of the front side portion 30 is not pressed by the inner surface of the narrowing portion 31, and the protruding convex portion 41 of the front sheet 22 located in the central portion in the width direction of the narrowing portion 31 is not pressed by the inner surface of the front side portion 30, so that the shape of the convex portion 41 can be maintained. In addition, as Fig.13As shown, a space S1 is formed in the portion of the narrowed portion 31 that is biased toward the forward side, so that the convex portion 41 near the urination position Z can be maintained, thereby maintaining a pad that can suppress a decrease in the absorbent amount, has excellent fit in the crotch portion C, and has excellent backflow prevention properties.

[0081] Next, if Fig. 9 , Fig.10 As shown, the rear side portion 32 in which the left rear side portion 32A and the right rear side portion 32B are bent is bent inwardly around the third bending line 35 .

[0082] Thus, the outer surface of the second left rear side portion 37A extending rearward from the third bending line 35 in the left rear side portion 32A overlaps with the outer surface of the front side portion 30, and the outer surface of the second right rear side portion 37B extending rearward from the third bending line 35 in the right rear side portion 32B overlaps with the outer surface of the front side portion 30. Fig.11 , 12 As shown, a space S2 is formed between the outer surface of the narrowed portion 31 in the central portion in the width direction and the inner surface of the rear side portion 32. Therefore, for the protruding convex portion 41 of the front sheet 22 located in the central portion in the width direction of the rear side portion 32, it is possible to suppress the outer surface of the narrowed portion 31 from pressing the convex portion, so that the shape of the convex portion 41 can be maintained. In addition, the height of the space S2 in the inner and outer directions is approximately half of the height of the space S1 in the inner and outer directions, so that the proportion of the shape of the convex portion 41 maintained is small.

[0083] In the first embodiment, after the left rear side portion 32A and the right rear side portion 32B are bent inwardly about the third bending line, the left front side portion 30A and the right front side portion 30B may be bent inwardly about the second bending line.

[0084] Therefore, if Fig.14 As shown, a space S3 is formed between the inner surface of the narrowed portion 31 and the inner surface of the rear side portion 32, and a space S4 is formed between the outer surface of the rear side portion 32 and the inner surface of the front side portion 30. Thus, the shapes of the convex portion 41 on the inner surface of the narrowed portion 31 and the rear side portion 32, and the convex portion 41 on the inner surface of the front side portion 30 can be maintained. In addition, the height of the spaces S3 and S4 in the inner and outer directions is approximately half of the height of the space S1 in the inner and outer directions, so that the proportion of the shape of the convex portion 41 being maintained is small.

[0085] <Second embodiment>

[0086] Next, a pad according to a second embodiment will be described. The same reference numerals are used for the same components as those of the pad according to the first embodiment, and description thereof will be omitted. Fig.15As shown in the figure, at the front-back direction end portions of the outer absorbent body 23B, the first left front overlap portion 50A and the first right front overlap portion 50B are respectively provided with a rectangular shape extending in the front-back direction with a predetermined interval in the width direction. The first left front overlap portion 50A and the first right front overlap portion 50B can be formed by increasing the weight per unit area of ​​the pulp fiber accumulation body or the like forming the outer absorbent body 23B.

[0087] A second left rear overlap portion 51A and a second right rear overlap portion 51B having a substantially triangular shape are provided at the portions of both sides in the width direction of the outer absorbent body 23B that are opposite to the third bending line 35. The front side portion of the second left rear overlap portion 51A extends to the front side of the third bending line 35, and the rear side portion of the second left rear overlap portion 51A extends to the rear side of the third bending line 35. Similarly, the front side portion of the second right rear overlap portion 51B extends to the front side of the third bending line 35, and the rear side portion of the second right rear overlap portion 51B extends to the rear side of the third bending line 35. The second left rear overlap portion 51A and the second right rear overlap portion 51B can be formed by increasing the weight per unit area of ​​the pulp fiber accumulation body or the like that forms the outer absorbent body 23B.

[0088] Thus, the inner and outer heights of the space S1 formed in the following circumstances can be made higher: the outer absorbent body 23B is bent inwardly with the first bending line 33 as the center, the front side portion 30 of the outer absorbent body 23B is bent inwardly with the second bending line 34 as the center, and the rear side portion 32 of the outer absorbent body 23B is bent inwardly with the third bending line 35 as the center, thereby further maintaining the shapes of the convex portion 41 of the front sheet 22 located in the central portion of the front side portion 30 and the convex portion 41 of the front sheet 22 located in the central portion of the narrowing portion 31.

[0089] <Third embodiment>

[0090] Next, a pad according to a third embodiment will be described. The same reference numerals are used for the same components as those of the pad according to the first embodiment, and description thereof will be omitted. Fig.16As shown, in the portions of the two sides in the width direction of the outer absorbent body 23B that are opposite to the second bending line 34, a rectangular third left center overlap portion 52A and a third right center overlap portion 52B are provided, respectively, with a predetermined interval in the width direction and extending in the front-back direction. In addition, the front side portion of the third left center overlap portion 52A extends to the front side of the second bending line 34, and the rear side portion of the third left center overlap portion 52A extends to the rear side of the second bending line 34. Similarly, the front side portion of the third right center overlap portion 52B extends to the front side of the second bending line 34, and the rear side portion of the third right center overlap portion 52B extends to the rear side of the second bending line 34. In addition, the third left center overlap portion 52A and the third right center overlap portion 52B can be formed by increasing the weight per unit area of ​​the pulp fiber accumulation body or the like that forms the outer absorbent body 23B.

[0091] A second left rear overlap portion 51A and a second right rear overlap portion 51B having a substantially triangular shape are provided at the portions of both sides in the width direction of the outer absorbent body 23B that are opposite to the third bending line 35. The front side portion of the second left rear overlap portion 51A extends to the front side of the third bending line 35, and the rear side portion of the second left rear overlap portion 51A extends to the rear side of the third bending line 35. Similarly, the front side portion of the second right rear overlap portion 51B extends to the front side of the third bending line 35, and the rear side portion of the second right rear overlap portion 51B extends to the rear side of the third bending line 35. The second left rear overlap portion 51A and the second right rear overlap portion 51B can be formed by increasing the weight per unit area of ​​the pulp fiber accumulation body or the like that forms the outer absorbent body 23B.

[0092] Thus, the inner and outer heights of the space S1 formed in the following circumstances can be made higher: the outer absorbent body 23B is bent inwardly with the first bending line 33 as the center, the front side portion 30 of the outer absorbent body 23B is bent inwardly with the second bending line 34 as the center, and the rear side portion 32 of the outer absorbent body 23B is bent inwardly with the third bending line 35 as the center, thereby further maintaining the shapes of the convex portion 41 of the front sheet 22 located in the central portion of the front side portion 30 and the convex portion 41 of the front sheet 22 located in the central portion of the narrowing portion 31.

[0093] Industrial Applicability

[0094] The present invention can be used in absorbent articles.

Claims

1. A pad comprising: a liquid-permeable front sheet; a liquid-impermeable back sheet; and an absorbent body disposed between the front sheet and the back sheet, It is characterized in that A protruding convex portion is formed on the front sheet, The absorbent body is formed by: a front side portion located at the front side in the front-back direction; a narrowed portion located at the center portion in the front-back direction; and a rear side portion located at the rear side in the front-back direction, When viewed from above, the left front side portion of the front side portion extends to the left side compared to the left narrowing side of the narrowest width portion of the narrowing portion, and the right front side portion of the front side portion extends to the right side compared to the right narrowing side of the narrowest width portion of the narrowing portion. When viewed from above, the left rear side portion of the rear side portion extends to the left side compared to the left narrowing side of the narrowest width portion of the narrowing portion, and the right rear side portion of the rear side portion extends to the right side compared to the right narrowing side of the narrowest width portion of the narrowing portion. The left front side portion and the left rear side portion are bent inwardly with a first imaginary left bending line extending in the front-rear direction and located on the left narrow side as a center. The right front side portion and the right rear side portion are bent inwardly with an imaginary first right bending line extending in the front-rear direction and located on the right narrowed side as a center. The left front side portion and the right front side portion do not overlap each other, and the left rear side portion and the right rear side portion do not overlap each other, The narrowing portion is not bent inwardly with the first left bending line as the center, and is not bent inwardly with the first right bending line as the center, When viewed from above, a second fold line extending in the width direction is provided at a front position of a position where the absorbent body is divided into three parts in the front-back direction, and a third fold line extending in the width direction is provided at a rear position of a position where the absorbent body is divided into three parts in the front-back direction. The front side portion in the state where the left front side portion and the right front side portion are bent is bent inwardly with the second bending line as the center, The left front side portion is arranged inside a first left rear side portion extending forwardly of the third bending line in the left rear side portion, The right front side portion is arranged inside the first right rear side portion extending forwardly from the third bending line in the right rear side portion, and then, The rear side portion in the state where the left rear side portion and the right rear side portion are bent is bent inwardly with the third bending line as the center, Thus, a first space is formed between the inner surface of the narrowed portion and the inner surface of the front side portion in the central portion in the width direction of the pad. A second space is formed between the outer surface of the narrowed portion and the inner surface of the rear portion at the center portion in the width direction of the pad, and the height of the second space in the inner and outer directions is half of the height of the first space in the inner and outer directions. Therefore, the shape of the convex portion of the front sheet that is opposed to the front side portion, the narrowed portion, and the rear side portion and that protrudes inward can be maintained.

2. The pad according to claim 1, characterized in that A rectangular first left front overlapping portion and a rectangular first right front overlapping portion are respectively provided at the portion overlapping the first left bending line and the first right bending line in the front portion of the front side portion. A second left rear overlapping portion having a triangular shape with a top at the front side and a second right rear overlapping portion having a triangular shape with a top at the front side are respectively provided at the portion overlapping with the first left bending line and the first right bending line in the front part of the rear side. The second left rear overlapping portion and the second right rear overlapping portion extend to the front side of the third bending line, respectively.

3. The pad according to claim 1, characterized in that A rectangular third left middle overlapping portion and a rectangular third right middle overlapping portion are respectively provided at the portions overlapping the second bending line in the two side portions of the narrowing portion. A second left rear overlapping portion having a triangular shape with a top at the front side and a second right rear overlapping portion having a triangular shape with a top at the front side are respectively provided at the portion overlapping with the first left bending line and the first right bending line in the front part of the rear side. The second left rear overlapping portion and the second right rear overlapping portion extend to the front side of the third bending line, respectively.

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