JP7126420B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles such as disposable diapers, incontinence pads, incontinence pads, and sanitary napkins.

From the standpoint of improving the feel on the skin and transferability of bodily fluids, there is known a technique of forming a specific three-dimensional shape on the side facing the skin of a topsheet used in absorbent articles such as disposable diapers. For example, in Patent Document 1, as a surface sheet of an absorbent article, ridge-shaped convex portions and dotted dots arranged alternately on the right side and left side adjacent positions on both sides of each convex portion at intervals in the longitudinal direction are disclosed. and a concave emboss, and in a cross section in the width direction passing through the concave emboss, the inclined surface between the concave emboss on the side close to the convex portion is a steep inclined surface, and the convex portion The slanted surface between the recessed embossment on the remote side is a gentle slanted surface, and the cross-sectional shape of the convex portion is left-right asymmetrical. The protrusions described in Patent Document 1 are wavy in plan view, and the positions of the tops of the protrusions in the width direction are different in the longitudinal direction. The first defined regions having the first protrusions formed thereon are provided in a grid pattern with the first and second embossings as base ends, and at least the second A second defined region is provided in which a second convex portion having a height relatively lower than that of the first convex portion is formed with the embossing as a base end. An absorbent article is described in which embossments are arranged in a predetermined pattern.

JP 2013-244256 A JP 2016-067466 A

Patent document 1 describes that the contact area between the topsheet and the skin is reduced, the ridge-like protrusions are easily crushed when body pressure is applied from the surface side, and the topsheet touches the skin softly. ing. However, when the skin and the topsheet are in contact with each other, the wavy protrusions deform irregularly in a twisted manner in a plan view. In such an absorbent article, as the wearer moves, the surface sheet tends to slip along the irregularly deformed protrusions, which in turn causes the absorbent article itself to slip, resulting in leakage of excrement such as urine. Inconvenience such as this may occur. Patent Document 2 describes improving the feel of the skin, but in the surface sheet described in Patent Document 2, the protrusions tend to deform in a certain direction when in contact with the skin. Due to this, the surface sheet tends to shift in the predetermined direction.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an absorbent article capable of overcoming the drawbacks of the prior art.

The present invention comprises a topsheet, a backsheet, and an absorbent body disposed between these sheets, each having an uneven region, and an absorbent body having a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction. a plurality of inclined projections protruding toward the wearer's skin side are formed in the uneven region, and the positions of the tops of the inclined projections are the inclined projections in the width direction. The absorptive absorbent is biased to one side or the other side in the width direction from the center position between both ends of the portion, and the direction in which the top portion is biased is the same over the entire length of the inclined convex portion in the longitudinal direction. It provides goods.

According to the absorbent article of the present invention, it is possible to effectively suppress displacement of the surface sheet, thereby reducing inconveniences such as leakage of excrement such as urine.

FIG. 1 is a plan view showing the basic configuration of a disposable diaper as one embodiment of the absorbent article of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a plan view showing the surface sheet (composite sheet) of the disposable diaper of the first embodiment. FIG. 4 is an enlarged plan view showing an enlarged part of the uneven area P of the composite sheet shown in FIG. FIG. 5 is an enlarged cross-sectional view showing a cross section in the thickness direction of the surface sheet (composite sheet) shown in FIG. 3, and FIG. 5(a) is along line III-III in FIG. A cross-sectional view, FIG. 5(b), is a cross-sectional view taken along line IV--IV of FIG. 6 is a thickness direction cross-sectional view along the width direction, showing the arrangement of the inclined convex portions in the width direction convex portion row shown in FIG. 3 . 7A and 7B are diagrams showing inclined convex portions in the concave-convex region of the surface sheet (composite sheet) of the second embodiment. FIG. 7A is a view corresponding to FIG. 6 showing the arrangement of the inclined convex portions. (b) is an enlarged sectional view of FIG. 7(a). FIG. 8 is a view equivalent to FIG. 6 showing the arrangement of inclined convex portions in the concave-convex region of the surface sheet (composite sheet) of the third embodiment. FIG. 9 is a view equivalent to FIG. 6 showing the arrangement of inclined convex portions in the concave-convex region of the surface sheet (composite sheet) of the fourth embodiment. FIG. 10 is a perspective view showing an uneven region of the surface sheet (composite sheet) of the fifth embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on its preferred embodiments with reference to the drawings.
1 and 2 show the basic structure of a disposable diaper 100 (hereinafter also referred to simply as diaper 100), which is an embodiment of the absorbent article of the present invention.
The diaper 100 comprises a liquid-permeable topsheet 12, a liquid-impermeable backsheet 13, and an absorbent body 14 disposed between the sheets 12 and 13, as shown in FIGS. Regarding the backsheet 13, liquid impermeability is a concept that includes liquid impermeability, and includes cases where the backsheet 13 is completely impermeable to liquid, and cases where the backsheet 13 is made of a water-repellent sheet or the like. In addition, in FIG. 2, illustration of an inclined convex portion, which will be described later, is omitted.

The diaper 100 has a longitudinal direction X corresponding to the front-rear direction of the wearer, and a width direction Y perpendicular to the longitudinal direction X when the diaper 100 is laid out flat as shown in FIG. there is In addition, the diaper 100 is divided into three equal parts in the lengthwise direction X, namely, an abdominal part A arranged on the abdomen of the wearer when worn, a dorsal part B arranged on the back of the wearer when worn, and a crotch portion C positioned between the ventral portion A and the back portion B. The diaper 100 is an unfolded disposable diaper, and has fastening tapes 17 on both side edges of the back portion B, and a landing zone 18 to which the fastening tapes 17 are attached on the outer surface of the abdomen portion A. is provided.

The absorbent body 14 in the diaper 100 comprises an absorbent core 14a and a core wrap sheet 14b wrapping the absorbent core 14a. The absorbent core 14a can be composed of, for example, a fiber stack of absorbent fibers such as pulp fibers, or a fiber stack of a mixture of absorbent fibers and water-absorbing polymers. Examples of absorbent fibers include pulp fibers, rayon fibers, cotton fibers, and cellulose-based hydrophilic fibers such as cellulose acetate. In addition to cellulose-based hydrophilic fibers, fibers made of synthetic resins such as polyolefin, polyester, and polyamide, which are hydrophilized with a surfactant or the like, can also be used. As the core wrap sheet 14b, for example, tissue paper or water-permeable nonwoven fabric is used. One core wrap sheet 14b may wrap the entire absorbent core 14a, or two or more sheets may be combined to wrap the absorbent core 14a. As the back sheet 13, a liquid-impermeable or water-repellent resin film, a laminate sheet of a resin film and a non-woven fabric, or the like is used.

Sheets 15 for forming three-dimensional gathers having elastic members 15a are arranged on both sides of the diaper 100 in the longitudinal direction X, and the contraction of the elastic members 15a causes the crotch part C in the worn state to move toward the skin side of the wearer. Three-dimensional gathers standing up toward are formed. In addition, leg elastic members 16 are arranged in a stretched state in the part of the crotch part C that is arranged around the leg, and the contraction of the leg part elastic member 16 allows the crotch part C in the worn state to fit around the leg of the wearer. Creates leg gathers that enhance

The topsheet 12 in the disposable diaper 100 of the first embodiment is composed of the composite sheet 10 shown in FIG. The composite sheet 10 has an uneven region P over its entire area, and a plurality of inclined convex portions 4 are formed in the uneven region P so as to protrude toward the wearer's skin. As described above, the uneven area P is an area in which a plurality of inclined convex portions 41 made of a fiber sheet such as a nonwoven fabric are formed while being dispersed in both the longitudinal direction and the width direction. As shown in FIGS. 3 and 4, it is preferable that a plurality of inclined convex portions 41 be arranged along both the longitudinal direction X and the width direction Y in a predetermined pattern.

As shown in FIG. 5(a), the inclined projection 41 protrudes toward the wearer's skin, and the position of the apex t is the center between both ends e1 and e2 of the inclined projection 41 in the width direction Y. It is a protrusion that is biased to one side or the other side in the width direction Y from the position 41c. Both ends e1 and e2 of the inclined convex portion 41 are both ends in a cross section along the width direction Y of the absorbent article, preferably passing through the top portion t. Both ends are the rising proximal ends of the inclined convex portions 41 .
The one side and the other side where the position of the top portion t is biased are opposite to each other in the width direction Y of the absorbent article, and have a relationship of left side or right side, for example. An inclined convex portion in which the position of the top portion t is deviated to one side in the width direction Y from the central position 41c is also referred to as a first inclined convex portion, and an inclined convex portion in which the position of the top portion t is deviated to the other side in the width direction Y from the central position 41c. The portion is also called a second inclined convex portion. The first inclined convex portion may be an inclined convex portion in which the position of the top portion t is shifted to the left side of the central position 41c, or an inclined convex portion in which the position of the top portion t is shifted to the right side of the central position 41c. good. In FIG. 5(a), for convenience of explanation, an inclined convex portion whose top portion t is shifted leftward from the central position 41c is defined as a first inclined convex portion, and an inclined convex portion whose top portion t is shifted rightward from the central position 41c. Although the convex portion is described as the second inclined convex portion, the left side in FIG. 5A may be the left side in FIG. 1 or the right side in FIG.

The position of the top portion t of the inclined convex portion 41 is 5 in the front and rear direction from the central position 41c when the length L2 between the both ends e1 and e2 of the inclined convex portion 41 in the width direction Y (FIG. 5A) is assumed to be 100%. %, and more preferably outside the distance range of 10% or less from the central position 41c.

The direction J in which the top portion t of the inclined convex portion 41 is biased is the same over the entire length of the inclined convex portion 41 in the longitudinal direction X. As shown in FIG. That is, the apex t of the inclined convex portion 41 is biased to the left or right in the width direction Y from the central position 41c over the entire length of the inclined convex portion 41 in the longitudinal direction X. As shown in FIG. The direction J in which the top portion t is biased is the direction in which the position of the top portion t is biased from the central position 41c in the width direction Y (see FIG. 5A). In each inclined convex portion 41, in the longitudinal direction X, the direction J in which the top portion t is biased is either one side or the other side, and the top portion t is excluded from the one side and the other side. . As the convex portion having the apexes deviated on both sides, the apex t along the longitudinal direction X is arranged on one side and the other side of the width direction Y around the central position 41c, like the convex portion described in Patent Document 1. Examples include those extending on both sides.

In addition to the inclined convex portions 41, non-inclined convex portions may be formed in the uneven region P. FIG. The non-inclined convex portion is a convex portion that protrudes toward the skin side of the wearer and has a top portion located at a central position between both ends in the width direction Y of the non-inclined convex portion. In the composite sheet 10 of the disposable diaper 100 of the first embodiment, the inclined convex portion 41 is formed over the entire uneven area P, and the uneven area P of the topsheet 12 is located on the back side portion B. The inclined convex portion 41 is formed in any of the portion, the portion located in the crotch portion C, and the portion located in the abdominal portion A. As shown in FIG. Further, the inclined convex portions 41 may be formed only in the dorsal portion B of the topsheet 12, or the inclined convex portions 41 may be formed only in the ventral portion A. Both of the portions A may be formed with the inclined convex portions 41 . Further, the crotch portion C may be formed with an inclined convex portion, or may be formed with a non-inclined convex portion.

In the disposable diaper 100 of the present embodiment, since the uneven area P has a plurality of inclined convex portions 41 whose top positions are deviated to one side or the other side in the width direction Y, when the disposable diaper 100 comes into contact with the skin during wearing, the width direction At Y, the inclined convex portion 41 is likely to be deformed so as to fall on the biased side of the top portion t, and is likely to be similarly deformed when coming into contact with the wearer's skin as the wearer moves. In addition, the inclined convex portion 41 is less likely to fall in the direction K opposite to the direction J in which the top portion t is biased, and the frictional force when pressurized along the direction K opposite to the direction J in which the top portion t is biased. is high [see FIG. 5(a)]. When the direction of deformation of the inclined projections 41 is controlled in this way, when the inclined projections 41 are pressed in the opposite direction due to movement of the wearer, the surface sheet 12 shifts in the opposite direction. can be effectively suppressed. As a result, the disposable diaper 100 is maintained at an appropriate position in the width direction Y, so that it is possible to reduce the occurrence of problems such as leakage of excrement such as urine due to displacement of the disposable diaper.
On the other hand, a surface sheet having only non-inclined convex portions or a surface sheet having wavy convex portions in a plan view cannot control the deformation direction of the convex portions when pressure is applied. Therefore, it is difficult to maintain the proper position of the diaper.

The uneven region P may have an inclined convex portion with the top portion t deviated in only one direction. As shown in FIG. 5( a ), it is preferable that the first inclined convex portion and the second inclined convex portion are formed as the inclined convex portion 41 . The coexistence of the first and second inclined convex portions in which the direction in which the top portion t is biased is opposite to each other increases the frictional force in each of the directions on both sides of the width direction Y [left and right in FIG. Shifting of the sheet 12 in the width direction Y can be effectively suppressed.

A plurality of inclined convex portions 41 are formed in the concave-convex region P in the present embodiment so as to be spaced apart in the width direction Y, as shown in FIG. 5(a). From the viewpoint of suppressing irregular deformation of the skin-contacting surface of the topsheet 12 due to overlapping of adjacent inclined convex portions 41 in the width direction Y when the inclined convex portions 41 are deformed, the inclined convex portions 41 are: Like the inclined convex portion 41a shown in FIG. 5A, the position of the top portion t is the width direction Y of the other inclined convex portion 41b that is closest to the top portion t of the inclined convex portion 41a in the width direction Y. It is preferred not to extend beyond the position of the ends. The other inclined convex portion 41b is an inclined convex portion adjacent in the width direction Y to the inclined convex portion 41a. As a result, when the inclined projection 41 is deformed so as to fall in the direction in which the top portion t is biased, the inclined projection 41 is prevented from overlapping other adjacent inclined projections.

Like the inclined convex portion 41a shown in FIG. 5(a), the inclined convex portion 41 existing in the uneven region P has a rising portion g on one side in the width direction Y where the position of the top portion t is deviated. It is preferably slanted to the side. Here, "perpendicular" means perpendicular to a plane F extending parallel to the surface of the surface sheet 12 (a plane perpendicular to the thickness direction) F, and the state of being inclined to the one side from the perpendicular is shown in FIG. When the position of the apex t is deviated to the left from the central position 41c as in the inclined convex portion 41a shown in FIG. , when it is deviated to the right from the center position 41c, it is in a state of being tilted to the right.
The inclined convex portion 41a shown in FIG. 5(a) is inclined such that the rising portion g on the left side in the width direction Y where the position of the top portion t is deviated is inclined to the left side of the vertical, and the inclined convex portion 41a is It has an overhang portion on the left side (one side) where the position of the top portion t is biased. As a result, when the top sheet 12 is pressed against the wearer's skin , the position of the apex t becomes more inclined to the left side (one side), and the direction of deformation of the inclined projections 41 is more controlled.
The rising portion g of the inclined convex portion 41 should have an inclination angle θ of less than 90° with respect to a plane F extending parallel to the surface of the top sheet 12 (a plane perpendicular to the thickness direction), where 90° is perpendicular. is preferable, more preferably 30° or more and less than 80°, and still more preferably 45° or more and 60° or less.

As shown in FIG. 4, the inclined convex portion 41 in the present embodiment has a vertically long shape in plan view in which the length in the longitudinal direction X is longer than the length in the width direction Y of the absorbent article. When the inclined convex portion 41 has a vertically elongated plan view shape, the position of the top portion t is easily biased to one side or the other side in the width direction Y, and when it is pressed by the wearer's skin , the one side or the other side is easily displaced. It becomes easy to fall to the other side, and displacement of the topsheet 12 is further suppressed. In the inclined convex portion 41, the length L1 in the longitudinal direction X (see FIG. 5B) is preferably 1.1 times or more, or more than the length L2 in the width direction Y (see FIG. 5A). preferably 1.5 times or more, more preferably 6.0 times or less, more preferably 4.0 times or less, more preferably 1.1 times or more and 6.0 times or less, more preferably 1.5 times It is more than 4.0 times and less than 4.0 times. The length L1 in the longitudinal direction X of the inclined convex portion 41 is the maximum length in the longitudinal direction X of the inclined convex portion 41, and the length L2 in the width direction of the inclined convex portion 41 is the width direction Y of the inclined convex portion 41. is the maximum length of
From the viewpoint of controlling the deformation direction of the inclined convex portion 41, the length L1 in the longitudinal direction X of the inclined convex portion 41 [see FIG. 5(b)] is preferably 3 mm or more, more preferably 5 mm or more, and It is preferably 100 mm or less, more preferably 75 mm or less, more preferably 3 mm or more and 100 mm or less, more preferably 5 mm or more and 75 mm or less.

In the uneven region P of the present embodiment, the stacked first sheet 1 and second sheet 2 are joined to each other at a plurality of joints 3, and the first sheet 1 is An inclined convex portion 41 is formed so as to protrude in a direction away from the second sheet 2 . As a result, the vicinity of the rising base end of the inclined convex portion 41 is fixed to the second sheet 2 , so that the inclined convex portion 41 easily falls down around the vicinity of the rising base end, and the displacement of the top sheet 12 is further suppressed. be.
Further, in the present embodiment, the composite sheet 10 forming the uneven area P of the surface sheet 12 has a substantially flat surface on the side of the second sheet 2 as shown in FIG. The sloping projections 41 and the recesses 30 between the sloping projections form unevenness with large undulations.

In this embodiment, the surface sheet 12 has a convex portion row R1 in which a plurality of inclined convex portions are arranged along the longitudinal direction X in the concave-convex region P. As shown in FIG. It is preferable that the surface sheet 12 partially has portions 31 and 32 densified by embossing between the inclined convex portions 41 and 41 in the convex portion row R1. The positions of the top portions t of the plurality of inclined convex portions 41 constituting the convex portion row R1 may be biased to the same side in the width direction Y, or the positions of the top portions t may be biased to different sides in the width direction Y. good too. For example, the row of protrusions R1 may be composed of first and second inclined protrusions.

In the present embodiment, the portions 31 and 32 densified by embossing are a first joint portion 31 where the first sheet 1 and the second sheet 2 are fused by heat embossing, and a heat embossing portion. It has a second joint 32 in which the first sheet 1 and the second sheet 2 are fused by embossing (see FIG. 4). The first joint portion 31 has a shape that is longer in the width direction Y than in the longitudinal direction X. As shown in FIG. That is, a plurality of inclined convex portions 41 are formed along the width direction Y in the concave-convex region P, and the oblong joint portions 31 are formed between the inclined convex portions 41 adjacent to each other in the width direction Y. When the horizontally long joint portions 31 are provided between the inclined convex portions 41 arranged in the width direction Y in this way, the positions of the top portions t of the inclined convex portions can be easily shifted to either side of the width direction Y, and the displacement of the top sheet 12 can be prevented. Occurrence can be further suppressed.

In the present embodiment, the disposable diaper 100 has a rear portion disposed on the rear side of the wearer and a front portion disposed on the front side of the wearer with respect to the width direction center line that bisects the entire length in the longitudinal direction. 2, it is preferable that the inclined convex portion 41 is formed at least on the rear portion or the front portion. Since the rear portion is a portion where the surface sheet 12 is likely to be pressed against the wearer's skin as the wearer moves, by arranging the inclined convex portions 41 in the rear portion, the displacement of the surface sheet 12 can be prevented. can be further suppressed.

Further explaining the uneven region P of the surface sheet 12 in this embodiment, as shown in FIG. A plurality of them are arranged along both sides of the width direction Y. More specifically, as shown in FIG. 3, the inclined convex portions 41 are arranged in a staggered manner, and a plurality of inclined convex portions 41 are arranged in series along the longitudinal direction X at regular intervals. R1 are formed in a plurality of rows in the width direction Y, and the arrangement positions of the inclined protrusions 41 of the longitudinal protrusion rows R1 adjacent in the width direction Y are shifted in the longitudinal direction X by half a pitch. Further, the inclined convex portions 41 of the longitudinal convex portion rows R1 adjacent in the width direction Y overlap so that portions thereof are alternately arranged in the longitudinal direction X. As shown in FIG.

Between the inclined convex portions 41 adjacent to each other in the longitudinal direction X in the longitudinal direction convex portion row R1, as shown in FIG. A joint portion 31 is formed. Further, the first joint portion 31 is positioned between the inclined convex portions 41 adjacent to each other in the width direction Y in the width direction convex portion row R2. The first joint portion 31 between the inclined convex portions 41 adjacent in the width direction Y is the first joint portion 31 located between the inclined convex portions 41 in the longitudinal convex portion row R1 adjacent in the width direction. In the laterally long first joint portion 31, the length b in the width direction Y is preferably 1.2 times or more, more preferably 1.5 times or more, and preferably 5.5 times or more, as long as the length a in the longitudinal direction X. It is 0 times or less, more preferably 3.0 times or less, more preferably 1.2 times or more and 5.0 times or less, more preferably 1.5 times or more and 3.0 times or less.

Further, in the uneven region P, a plurality of width direction projection rows R2 are formed in the longitudinal direction X in which a plurality of inclined projections 41 are arranged in series along the width direction Y at regular intervals. FIG. 6 shows the arrangement of the inclined convex portions in the width direction convex portion row R2. In FIG. 6, the joint portion is drawn small for the convenience of explaining the arrangement of the inclined convex portions. The widthwise convex portion row R2 is composed of first and second inclined convex portions whose top portions t are biased in directions opposite to each other. alternately. With such an arrangement, displacement of the topsheet 12 in the width direction Y can be further suppressed.

Like the first sheet 1 of the composite sheet 10 in the present embodiment, the fiber sheet forming the inclined projections 41 may be, for example, a nonwoven fabric, a woven fabric, or a knitted fabric, preferably a nonwoven fabric. As the second sheet 2 that is partially joined to the first sheet 1 to form the composite sheet 10, sheet materials made of various materials such as fiber sheets such as nonwoven fabrics, woven fabrics and knitted fabrics, and films can be used. . The types of sheet materials forming the first sheet 1 and the second sheet 2 may be the same or different. The sheet material forming the second sheet 2 may be mesh or the like.

Examples of nonwoven fabrics in the case of using a nonwoven fabric as a sheet material constituting the first sheet 1 or the second sheet 2 include air-through nonwoven fabrics, spunbond nonwoven fabrics, spunlaced nonwoven fabrics, meltblown nonwoven fabrics, resin-bonded nonwoven fabrics, and needle-punched nonwoven fabrics. be done. A laminate obtained by combining two or more of these nonwoven fabrics, or a laminate obtained by combining these nonwoven fabrics with a film or the like can also be used. Among these, it is preferable to use an air-through nonwoven fabric or a spunbond nonwoven fabric. The basis weight of the nonwoven fabric used as the sheet material constituting the first sheet 1 and the second sheet 2 is preferably 10 g/m ² or more, more preferably 15 g/m ² or more, and preferably 40 g/m ² or less. More preferably, it is 35 g/m ² or less. The basis weight of the nonwoven fabric is preferably 10 g/m ² or more and 40 g/m ² or less, more preferably 15 g/m ² or more and 35 g/m ² or less.

As fibers constituting the nonwoven fabric, fibers made of various thermoplastic resins can be used. Examples of thermoplastic resins include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyamides such as nylon 6 and nylon 66, polyacrylic acid, polymethacrylic acid alkyl esters, polyvinyl chloride, and polyvinylidene chloride. These resins can be used singly or as a blend of two or more. Moreover, it can be used in the form of a composite fiber such as a core-sheath type or a side-by-side type.

As shown in FIG. 4 , each inclined convex portion 41 is surrounded by a first joint portion 31 and a second joint portion 32 having a shorter longitudinal length than the first joint portion 31 . Each inclined convex portion 41 is surrounded by four or more joint portions 3 , thereby forming a concave portion 30 surrounding each inclined convex portion 41 . In addition, the recesses 30 surrounding the plurality of inclined projections 41 are continuous with each other, and continuous recesses are formed in the uneven region P other than the inclined projections 41 in a mesh shape.
When joint portions between the first sheet 1 and the second sheet 2 are collectively referred to as joint portions 3, the number of joint portions 3 surrounding each inclined convex portion 41 is preferably 4 or more, more preferably 8 or more. and preferably 20 or less, more preferably 16 or less. These numbers of joint portions 3 are preferably provided as pairs sandwiching the inclined convex portion 41 from both sides in the longitudinal direction X or as pairs sandwiching the inclined convex portion 41 from both sides in the width direction Y.

In the second joint portion 32, the length d in the width direction Y is preferably 20% or more and 85% or less, more preferably 30% or more and 70% or less of the length b in the width direction Y of the first joint portion 31. be. In addition, the length c of the second joint portion 32 in the longitudinal direction X is preferably 0.8 or more and 1.2 or less, more preferably 0.8 or more and 1.2 or less of the length a of the first joint portion 31 in the longitudinal direction X. It is 9 or more and 1.1 or less.

It is preferable that the first sheet (sheet material) forming the inclined convex portions 41 has a compacted portion between the inclined convex portions 41 adjacent to each other in the width direction Y, where the first sheet (sheet material) is partially compacted. As in this embodiment, when the inclined convex portion 41 is formed from the composite sheet 10 having the joint portion 3 of the first sheet 1 and the second sheet 2, the joint portion 3 is partially formed by embossing or the like. Preferably, the portion is positively pressed and consolidated. In addition, when the single-layer sheet material is partially pressurized and compressed, or when the joint 3 between the first sheet 1 and the second sheet 2 is partially pressurized and compressed by embossing or the like, the pressurized compression The slanted portion is preferable in that it becomes a consolidation portion having a higher density than other portions, and the inclined convex portion is more likely to fall in a direction in which the position of the top portion t is deviated.

From the viewpoint of ensuring that one or more of the above-described effects are achieved, the height H1 of the inclined convex portion 41 [see FIG. .0m
m or more, preferably 5.0 mm or less, more preferably 4.0 mm or less, more preferably 1.0 mm or more and 5.0 mm or less, further preferably 2.0 mm or more and 4.0 mm or less. When a non-inclined convex portion coexists in the uneven region P, the height of the non-inclined convex portion may be the same as or different from that of the inclined convex portion 41, but in one example, the inclined convex portion 41 slightly lower than The preferred range of the height of the non-inclined protrusions is the same as the preferred range of the height of the inclined protrusions described above.
When the uneven area P is formed of the composite sheet 10 having the joint portion 3 of the first sheet 1 and the second sheet 2, the height of the inclined convex portion 41, as shown in FIG. is defined as the distance from the bottom surface of the first sheet 1 to the top surface of the top of the first sheet 1 . The height is a value obtained by observing the cross section of each protrusion using a digital microscope (manufactured by Keyence) and measuring the shortest distance between the bottom surface of the second sheet 2 and the top of the protrusion. The measurement is performed for five or more inclined projections, and the average value of these heights is taken as the height of the inclined projections. The height of the non-inclined convex portion is also measured by the same method.
When the uneven region P is formed of a single-layer sheet material, the height of the inclined projections is determined by a straight line connecting the apexes of the adjacent inclined projections in the width direction Y and the highest point between the inclined projections. The difference in height from the lower surface of the portion apart from the straight line is defined as the height of the inclined convex portion.

The position of the top portion t of the inclined projection 41, the height of the inclined projection 41, and the like are determined by observing a cross section passing through the top portion t of the inclined projection 41 and extending in the width direction Y. FIG. In addition, when the inclined convex portion 41 is formed from a sheet material (first sheet) that is joined to another sheet such as the second sheet 2 , the observation is made between the first sheet 1 and the second sheet 2 . The composite sheet 10 having the joint portion 3 is taken out from the absorbent article, and a cross section passing through the top portion t of the inclined convex portion 41 and extending in the width direction Y is observed and judged.

Next, second to fifth embodiments of the topsheet 12 according to the present invention will be described with reference to FIGS. 7 to 10. FIG. For the topsheets 12a to 12d of the second to fifth embodiments, the description of the topsheet 12 of the first embodiment is appropriately applied as long as there is no contradiction. In FIGS. 7 to 10, the same reference numerals as those of the topsheet 12 of the first embodiment are assigned to the same configurations as those of the topsheet 12 of the first embodiment.

The surface sheet 12 in the above-described first embodiment has a plurality of width direction convex portion rows R2 in which the first and second inclined convex portions are alternately arranged in the width direction Y. Although the first and second inclined convex portions were mixed, in the surface sheet 12a in the second embodiment, the plurality of first inclined convex portions and the plurality of second inclined convex portions are arranged continuously in the width direction Y. It has a plurality of width direction projection rows R2a. The uneven region P in the second embodiment has a region in which the first inclined convex portions coexist in the longitudinal direction X and the width direction Y, and a region in which the second inclined convex portions coexist in the longitudinal direction X and the width direction Y. ing. The width direction convex portion row R2a in the second embodiment includes the first inclined convex portion 41a having the top portion t biased to one side (left or right) and the top portion t being biased to the other side (right or left). A first inclined convex portion small row R3 in which a plurality of first inclined convex portions 41a are continuously arranged, and a plurality of second inclined convex portions 41b are arranged in a row. 7(a)]. With such an arrangement, displacement of the topsheet 12 in the width direction Y can be further suppressed.

FIG. 7(b) is an enlarged cross-sectional view showing the second slanted protrusions 41b forming the second slanted protrusion small row R4 in the second embodiment. As in the second embodiment, the consolidation portion (joint portion 3) formed between the inclined convex portions 41 having the same direction in which the position of the top portion t is biased is the side (left side or It is preferable that the density of the end portion 3b on the side opposite to the biasing side (right or left side) is higher than the density of the end portion 3a on the right side (see FIG. 7(b)). Such a configuration makes it easier for the inclined convex portion to fall in a direction in which the position of the top portion t is deviated.

The densities of the end 3a on the side where the position of the top of the consolidation portion deviates and the end 3b on the side opposite to the deviated side are measured as follows.
[Method for measuring the density of the edge of the compacted part]
The density of the end portion of the consolidation portion is obtained by cutting out a measurement piece of 1.0 mm × 1.0 mm from each end of the consolidation portion in the longitudinal direction X, and measuring the flat area of 1.0 ^mm2 of the measurement piece. Multiply the thickness of the measurement piece to obtain the volume (mm ³ ) of the measurement piece, convert this volume value (mm ³ ) to “cm ³ ”, and convert the weight (g) of the measurement piece to the volume (cm ³ ) can be obtained by dividing by For the weight of the measurement piece, five or more measurement pieces cut out from both ends of the consolidation portion are collectively weighed on a balance, and the average value obtained by dividing by the number of the measurement pieces is used. The thickness of the piece to be measured was determined by cutting the cross section of the compacted portion at a distance of 0.5 mm in the longitudinal direction X from both ends in the longitudinal direction X with a sharp knife in the width direction Y using a digital microscope (manufactured by Keyence). ) and measured the distance from the lower surface to the upper surface of the consolidation portion at the center of the cross section in the width direction. The thickness shall be the average value of a minimum of five specimens measured at each end of the consolidation.

In the topsheet 12 of the first embodiment described above, the first and second inclined convex portions are formed over the entire uneven region P, but in the third and fourth embodiments shown in FIGS. Thus, in the uneven region P, non-inclined convex portions 43 may be formed in addition to the inclined convex portions 41 .
The surface sheet 12b in the third embodiment has a plurality of width direction convex portion rows R2b in which the non-inclined convex portions 43 are arranged between the first and second inclined convex portions 41a and 41b alternately arranged in the width direction Y. (see Figure 8). The width direction convex portion row R2b in the third embodiment is a convex portion small row R6 in which the first inclined convex portion 41a, the second inclined convex portion 41b, and the non-inclined convex portion 43 are arranged in this order. I have several along the way.
The surface sheet 12c in the fourth embodiment includes a first inclined convex portion small row R3 in which a plurality of first inclined convex portions 41a are continuously arranged, and a second inclined convex portion small row R3 in which a plurality of second inclined convex portions 41b are continuously arranged. A plurality of width direction convex portion rows R2c including a small inclined convex portion row R4 and a non-inclined convex portion small row R5 in which a plurality of non-inclined convex portions are continuously arranged between both inclined convex portion small rows R3 and R4. (See FIG. 9).

In the concave-convex region P, the width direction convex portion rows in which the plurality of convex portions 4 are arranged along the width direction Y may be composed only of inclined convex portions as in the first and second embodiments. , and may include inclined convex portions and non-inclined convex portions as in the third and fourth embodiments.
As in the third and fourth embodiments described above, when the inclined convex portions 41 and the non-inclined convex portions 43 coexist in the concave-convex region P, the number of inclined convex portions in the concave-convex region P is preferably 30% or more, more preferably 50% or more, preferably 100% or less, more preferably 90% or less, and preferably 30% or more and 100% or less, More preferably, it is 50% or more and 90% or less.

The ratio of the number of inclined convex portions to the number of all convex portions in the uneven region P, that is, the ratio of the inclined convex portions is the average value of the ratio of the inclined convex portions in five or more measurement pieces. The ratio of inclined convex portions in the measurement piece is obtained by cutting out five or more measurement pieces of 50 mm × 50 mm from the uneven region P, determining the number of all the convex portions present in the measurement piece, and then passing through the top of each convex portion. Then, the cross section extending in the width direction Y is observed to obtain the number of inclined convex portions, and the number of inclined convex portions is obtained by dividing the number of inclined convex portions by the total number of convex portions present on the measuring piece.

Further, when the width-direction convex portion row includes the inclined convex portions 41 and the non-inclined convex portions 43, the order of arrangement of the convex portions is not particularly limited, and the convex portions can be arranged in an arbitrary manner. For example, in the width direction convex portion row, between the convex portion pairs composed of the first and second inclined convex portions 41a and 41b arranged so that the position of the top portion t approaches or moves away from each other, or between the convex portion pairs. One or more non-inclined protrusions 43 may be arranged therebetween.

The uneven region P may have rows of width-direction protrusions with different ratios of the number of inclined protrusions. From the viewpoint of improving the effect of suppressing the displacement of the topsheet, the uneven region P is a row of width-direction projections, and a high proportion of inclined projections in which half or more of the projections constituting the row of width-direction projections are inclined projections. It preferably contains a section. In the high-proportion inclined convex portion row, the ratio of inclined convex portions is more than half, preferably more than half, more preferably 60% or more, still more preferably 80% or more, and even more preferably 100%. From the same point of view as above, it is preferable that the uneven region P includes a plurality of rows of high-ratio inclined convex portions. As a mode including a plurality of rows of high-ratio slanted convex portions, the entirety of the uneven region P is a high-ratio slanted convex portion row, or a high-ratio slanted convex portion row and a non-high-ratio slanted convex portion row are arranged in the longitudinal direction X Any pattern that alternates between As the width direction convex portion row, the non-high ratio inclined convex portion row includes a low ratio inclined convex portion row having a small ratio of inclined convex portions and a non-inclined convex portion row consisting only of non-inclined convex portions. As an arbitrary pattern, for example, a pattern in which two rows of non-high-ratio slanted convex portions and one row of high-ratio slanted convex portions are alternately arranged along the longitudinal direction X can be cited. Further, when the high ratio inclined convex portion row has inclined convex portions and non-inclined convex portions, the high ratio inclined convex portion row is a small row of inclined convex portions in which a plurality of inclined convex portions are continuously arranged in the width direction Y. It is preferable that the non-inclined convex portions are alternately arranged in the width direction Y. Examples of the small row of inclined projections include the first small row R3 of inclined projections and the second small row R4 of inclined projections.

In the case where the surface sheet has a region in which convex portions including inclined convex portions are formed and a region in which only non-inclined convex portions are formed, the ratio of the inclined convex portions in the uneven region P and the rows of convex portions in the width direction The ratio of the inner inclined convex portions and the like are measured with respect to the area in which the convex portions including the inclined convex portions are formed.

In the first to fourth embodiments described above, the uneven region P includes the first and second inclined convex portions. When the inclined convex portions include the first and second inclined convex portions in this way, and the absorbent article is divided into the left region Q1 and the right region Q2 with the vertical center line CL as a boundary (see FIG. 1). , either one of the first inclined convex portion and the second inclined convex portion may be formed in either one of the left region Q1 and the right region Q2. Alternatively, the first inclined convex portion may be formed only in the left region Q1, and the second inclined convex portion may be formed only in the right region Q2. From the viewpoint of further suppressing displacement of the topsheet, it is preferable that the first inclined convex portion and the second inclined convex portion are formed in both the left region and the right region.

From the viewpoint of further suppressing displacement of the topsheet, the absorbent article is bisected in the width direction Y, and the first and second inclined protrusions are bilaterally symmetrical with respect to the longitudinal center line CL extending in the longitudinal direction X. It is preferable that they are arranged in a well-balanced manner. As a mode in which the first and second inclined convex portions are arranged in a well-balanced manner, for example, the absorbent article is divided into a left region Q1 and a right region Q2 with the vertical center line CL as a boundary (see FIG. 1), and both of these regions When the regions Q1 and Q2 are compared, it is preferable that the difference between the number of the first inclined convex portions and the number of the second inclined convex portions is small. More specifically, the difference between the number of the first inclined convex portions in the left region Q1 and the number of the second inclined convex portions in the right region Q2, and the difference between the number of the second inclined convex portions in the left region Q1 and the number of the second inclined convex portions in the right region Q2. It is preferable that there is little difference from the number of 1 inclined convex portions.

From the same point of view as above, let q1a be the number of first inclined convex portions in the left region Q1, q1b be the number of second inclined convex portions in the left region Q1, and q2a be the number of first inclined convex portions in the right region Q2. and the ratio q1 (%) defined by the following formula (1) or the ratio q2 (%) defined by the following formula (2) is low when the number of second inclined convex portions in the right region Q2 is q2b is preferred. Each of the ratio q1 (%) and the ratio q2 (%) is preferably 10% or less, more preferably 5% or less.

The numbers q1a, q1b, q2a, and q2b of the first and second inclined projections in the left area Q1 and the right area Q2 are measured as follows. First, five measurement pieces of 50 mm×50 mm are cut out from each of the left region Q1 and the right region Q2. Next, a cross section passing through the apex of each convex portion and extending in the width direction Y is observed, and the number of the first inclined convex portions and the number of the second inclined convex portions present in each measurement piece are counted. and the right region Q2, and the average values of the numbers q1a and q1b of the first and second sloping protrusions in the left region Q1 and the right region Q2. are the numbers q2a and q2b of the first and second inclined convex portions in .

In the surface sheet 12 of the first embodiment described above, a plurality of first and second inclined convex portions dispersed in the longitudinal direction X and the width direction Y are formed in the concave-convex region P. The sheet 12d has a ridge-groove structure in which a plurality of ridges 46 and grooves 33 positioned between the ridges 46 are provided in the uneven region, and the ridges 46 and the grooves 33 are alternately arranged in the width direction Y. and the ridges 46 are inclined projections (see FIG. 10). Thus, the inclined convex portion may be a ridge portion that is a convex portion continuous in the longitudinal direction X. FIG.

In order to manufacture the composite sheet 10 having the concave-convex region P in which the inclined convex portions 41 are formed, the belt-shaped first sheet 1 is placed in such a manner that the peripheral surfaces After the first sheet 1 is supplied between the first roll and the second roll having a meshing shape to deform the first sheet 1 into an uneven shape, the first sheet 1 is held on the peripheral surface of the first roll. After moving from the meshing portion, the second sheet 2 is supplied so as to be superimposed on the first sheet 1, and both sheets 1 and 2 are nipped under heating between the convex portion of the first roll and the heat roll. and partially join.
Next, the obtained composite sheet is pressed by the first nip roll, and at that time, the composite sheet is strongly pulled downstream and pressed by the second nip roll or the like arranged downstream of the first nip roll. As a result, the width of the composite sheet becomes smaller than that before stretching by stretching the composite sheet. By contracting the width of the composite sheet between the two nip rolls in this manner, the convex portions formed on the composite sheet are also contracted in width, and the tops of the convex portions are inclined in the width direction, forming inclined convex portions 41. A composite sheet 10 having an uneven region P is obtained. At this time, the direction in which the top of the inclined convex portion is biased can be controlled by the shape of the concave portion formed on the peripheral surface of the nip roll. The concave portion of the nip roll has a cross-sectional shape in the axial direction of the nip roll that is inclined in one direction, and this inclination direction corresponds to the direction in which the top portion of the inclined convex portion is displaced. For example, by using a nip roll having an uneven shape on its peripheral surface as the first nip roll, when the composite sheet shrinks in width, the convex portion formed on the composite sheet is pushed to the peripheral surface of the first nip roll. It can be inclined along the shape of the formed concave portion, thereby forming a first inclined convex portion and a second inclined convex portion. In particular, by using a nip roll having a plurality of uneven shapes corresponding to the width direction of the composite sheet, the first inclined convex portion and the second inclined convex portion are formed in both the left area Q1 and the right area Q2. In addition, by using a roll having a shape in which the uneven shape of the nip roll is uniform in the longitudinal direction of the composite sheet, that is, a plurality of strip-like recesses (grooves) extending in the rotation direction, the first and second A row of protrusions in the width direction having inclined protrusions is formed. From the viewpoint of easily forming the inclined convex portion 41, the peripheral speed of the second nip roll is preferably higher than the peripheral speed of the first nip roll, and is 1.05 times or more the peripheral speed of the first nip roll. is preferable, and more preferably 1.1 times or more. In addition, the first nip roll heats at least the roll on the side that contacts the first sheet 1 to a temperature lower than the melting point of the main constituent fibers of the first sheet 1, for example, a temperature lower than the melting point by 50° C. or higher and lower than the melting point. is preferred.

In addition, in order to form a densified portion (joint portion 3) having different densities at both ends in the width direction Y, as the first roll, the height from the base surface to the tip surface of the roll is continuous or continuous in the axial direction of the roll. Using a material having convex portions that change discontinuously, the sheets 1 and 2 are pinched between the first roll and the heat roll to obtain the first joint portion 31, the second joint portion 32, and the like. is formed.

In the case of using a composite sheet having regions where convex portions including inclined convex portions are formed and regions where only non-inclined convex portions are formed as the surface sheet, in order to manufacture a composite sheet with such a configuration, the following steps are required: The uneven shape of the first roll and the second roll and the pattern of the joint formed by the first roll and the heat roll are different between the central part and the side part of one sheet, and the treatment by the first nip roll described above is performed, It may be applied only to predetermined areas of the resulting composite sheet.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above-described embodiments and can be modified as appropriate.
For example, in the composite sheet 10 used as the topsheet 12 in the above-described first embodiment, the inclined convex portions are formed in a predetermined pattern over the entire area. It may have a plurality of sloped regions, or it may have a region in which convex portions including inclined convex portions are formed and a region in which only non-inclined convex portions are formed.
Further, in the above-described first embodiment, as shown in FIG. 3, the uneven region P having the inclined convex portions 41 is formed over the entire length of the diaper 100 in the longitudinal direction. In the absorbent article, the uneven region P having the inclined projections 41 may be formed only at any part in the longitudinal direction of the absorbent article. Alternatively, only the crotch portion C may be formed, or only the crotch portion C and the ventral portion A or only the crotch portion C and the dorsal portion B may be formed.

In addition, the uneven region P may have at least one portion in which two or more inclined convex portions whose apex positions are biased in the same direction are arranged along the longitudinal direction X, and the apex positions are different. The directionally biased inclined projections may have at least one alternate portion along the longitudinal direction X. As shown in FIG.
Further, a convex portion row in which a plurality of first inclined convex portions or second inclined convex portions are arranged in the longitudinal direction X, and a convex portion row in which a plurality of non-inclined convex portions are arranged in the longitudinal direction X may be formed. may be alternately formed in the width direction Y of the absorbent article, or may be formed in an appropriate order.

Also, the shape of the joint portion 3 surrounding the inclined convex portion 41 and other joint portions and their arrangement can be determined as appropriate. The shape of each joint may be rectangular, square, circular, elliptical, oval, triangular, quadrangular, pentagonal, hexagonal, star-shaped, heart-shaped, or any other shape.
In addition, the absorbent article of the present invention may be a pants-type (pull-on type) disposable diaper instead of an unfolded-type disposable diaper, or a pants-type or normal non-pants-type sanitary napkin. It may be an incontinence pad, a panty liner, or the like.

The present invention further discloses the following absorbent articles regarding the above-described embodiments.
<1>
An absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between the two sheets, each having an uneven region, and having a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction. hand,
A plurality of inclined convex portions protruding toward the wearer's skin side are formed in the uneven region,
The position of the apex of the inclined projection is biased toward one side or the other side in the width direction from a center position between both ends of the inclined projection in the width direction, and the direction in which the top is biased is the An absorbent article, wherein the entire length of the inclined protrusions in the longitudinal direction is the same.

<2>
As the inclined convex portions, a first inclined convex portion in which the position of the top portion is shifted from the central position to one side in the width direction, and a first inclined convex portion in which the position of the top portion is shifted to the other side in the width direction from the central position. The absorbent article according to <1> above, wherein two inclined convex portions are formed.
<3>
The absorbent article according to <1> or <2>, wherein a plurality of inclined convex portions are arranged along the longitudinal direction and a plurality of inclined convex portions are arranged along the width direction.
<4>
Any one of <1> to <3>, wherein the position of the apex of the slanted convex portion does not exceed the widthwise end of another slanted convex portion that is closest to the apex in the width direction. 1. The absorbent article according to 1.
<5>
Any one of <1> to <3>, wherein the position of the apex of the inclined projection does not exceed the position of the end in the width direction of another inclined projection adjacent to the inclined projection. Absorbent article according to.
<6>
The absorbent article according to any one of <1> to <5>, wherein the inclined convex portion has a vertically long shape in plan view, the length in the longitudinal direction being longer than the length in the width direction.
<7>
In the inclined convex portion, the maximum length L1 in the longitudinal direction is 1.1 times or more, preferably 1.5 times or more, and preferably 6.0 times or less, preferably 6.0 times or more, the maximum length L2 in the width direction. Any one of <1> to <6> above, which is 4.0 times or less, and is 1.1 times or more and 6.0 times or less, preferably 1.5 times or more and 4.0 times or less. absorbent article.
<8>
The absorbent article according to any one of <1> to <7>, wherein the uneven region has a row of protrusions in which a plurality of the inclined protrusions are arranged along the longitudinal direction.
<9>
A plurality of the inclined convex portions are formed along the width direction in the concave-convex region, and a joint having a shape longer in the width direction than in the longitudinal direction between adjacent inclined convex portions in the width direction. The absorbent article according to any one of <1> to <8> above, in which a part is formed.
<10>
When dividing the absorbent article into two halves along the entire length in the longitudinal direction and dividing the absorbent article into a rear portion arranged on the rear side of the wearer and a front portion arranged on the front side of the wearer, at least the rear portion, The absorbent article according to any one of <1> to <9>, wherein the inclined convex portion is formed.

＜１３＞
前記凹凸領域に、複数本の畝部と該畝部間に位置する溝部とを備え、該畝部と該溝部とが前記幅方向に交互に並んだ畝溝構造を有し、前記畝部が前記傾斜凸部である、前記＜１＞～＜１２＞の何れか１に記載の吸収性物品。
＜１４＞
前記凹凸領域に、前記傾斜凸部に加えて、非傾斜凸部を有しており、
前記非傾斜凸部は、着用者の肌側に向かって突出し、頂部の位置が、該非傾斜凸部における前記幅方向の両端間の中央位置に存する、前記＜１＞～＜１３＞の何れか１に記載の吸収性物品。
＜１５＞
前記傾斜凸部の頂部の位置は、前記幅方向における前記傾斜凸部の両端間の長さを１００％としたとき、中央位置から前後５％以内、好ましくは前後１０％以内の距離範囲の外にある、前記＜１＞～＜１４＞の何れか１に記載の吸収性物品。 <11>
The slanted protruding portions include a first slanted protruding portion in which the position of the apex is shifted from the central position to one side in the width direction, and a second slanted protruding portion in which the position of the apex is shifted from the central position to the other side in the width direction. 2 sloping protrusions, and
When the absorbent article is bisected in the width direction and divided into a left region and a right region with the vertical center line extending in the longitudinal direction as a boundary, both the left region and the right region have the first inclination. The absorbent article according to any one of <1> to <10>, wherein a convex portion and the second inclined convex portion are formed.
<12>
Let q1a be the number of the first inclined convex portions in the left region, q1b be the number of the second inclined convex portions in the left region, and q2a be the number of the first inclined convex portions in the right region. The absorption according to <11>, wherein each of the ratio q1 and the ratio q2 defined by the following formulas (1) and (2) is 10% or less, where q2b is the number of the second inclined convex portions in the region. sexual goods.

<13>
The uneven region has a ridge-groove structure in which a plurality of ridges and grooves located between the ridges are provided, the ridges and the grooves are alternately arranged in the width direction, and the ridges are The absorbent article according to any one of <1> to <12>, which is the inclined convex portion.
<14>
The uneven region has a non-inclined convex portion in addition to the inclined convex portion,
Any one of <1> to <13>, wherein the non-inclined convex portion protrudes toward the wearer's skin side, and the top portion is located at a central position between both ends of the non-inclined convex portion in the width direction. 1. The absorbent article according to 1.
<15>
The position of the apex of the inclined projection is outside the distance range of 5% or less, preferably 10% or less, from the central position when the length between both ends of the inclined projection in the width direction is taken as 100%. The absorbent article according to any one of <1> to <14> above.

100 disposable diapers (absorbent articles)
12 Topsheet 13 Backsheet 14 Absorber 10 Composite Sheet 1 First Sheet 2 Second Sheet 3 Joint 31 First Joint 32 Second Joint 4 Convex 41 Inclined Convex 43 Non-inclined Convex P Uneven Area R1 Longitudinal Row of protrusions in direction R2 Row of protrusions in width direction

Claims (11)

An absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between the two sheets, each having an uneven region, and having a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction. hand,
A plurality of inclined convex portions protruding toward the wearer's skin side are formed in the uneven region,
The position of the apex of the inclined projection is biased toward one side or the other side in the width direction from a center position between both ends of the inclined projection in the width direction, and the direction in which the top is biased is the It is the same over the entire length of the inclined convex portion in the longitudinal direction ,
An absorbent article , wherein each of the inclined projections is surrounded by recesses, and the recesses are continuous with each other in a mesh-like manner . An absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between the two sheets, each having an uneven region, and having a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction. hand,
A plurality of inclined convex portions protruding toward the wearer's skin side are formed in the uneven region,
The position of the apex of the inclined projection is biased toward one side or the other side in the width direction from a center position between both ends of the inclined projection in the width direction, and the direction in which the top is biased is the It is the same over the entire length of the inclined convex portion in the longitudinal direction,
The absorbent article, wherein a plurality of the inclined convex portions are arranged along the longitudinal direction, a plurality of the inclined convex portions are arranged along the width direction, and are dispersed in both the longitudinal direction and the width direction. As the inclined convex portions, a first inclined convex portion in which the position of the top portion is shifted from the central position to one side in the width direction, and a first inclined convex portion in which the position of the top portion is shifted to the other side in the width direction from the central position. 3. The absorbent article according to claim 1, wherein two inclined projections are formed. 4. The inclined projection according to any one of claims 1 to 3, wherein the position of the top of the inclined projection does not exceed the width direction end of another inclined projection that is closest to the top in the width direction. Absorbent article according to. 5. The absorbent article according to any one of claims 1 to 4, wherein said inclined convex portion has a vertically elongated plan view shape in which the length in the longitudinal direction is longer than the length in the width direction. The absorbent article according to any one of claims 1 to 5, wherein the uneven region has a row of protrusions in which a plurality of the inclined protrusions are arranged along the longitudinal direction. A plurality of the inclined convex portions are formed along the width direction in the concave-convex region, and a joint having a shape longer in the width direction than in the longitudinal direction between adjacent inclined convex portions in the width direction. 7. The absorbent article according to any one of Claims 1 to 6, wherein a part is formed. When dividing the absorbent article into two halves along the entire length in the longitudinal direction and dividing the absorbent article into a rear portion arranged on the rear side of the wearer and a front portion arranged on the front side of the wearer, at least the rear portion, The absorbent article according to any one of claims 1 to 7, wherein the inclined projections are formed. The slanted protruding portions include a first slanted protruding portion in which the position of the apex is shifted from the central position to one side in the width direction, and a second slanted protruding portion in which the position of the apex is shifted from the central position to the other side in the width direction. 2 sloping protrusions, and
When the absorbent article is bisected in the width direction and divided into a left region and a right region with the vertical center line extending in the longitudinal direction as a boundary, both the left region and the right region have the first inclination. The absorbent article according to any one of claims 1 to 8, wherein a convex portion and said second inclined convex portion are formed. Let q1a be the number of the first inclined convex portions in the left region, q1b be the number of the second inclined convex portions in the left region, and q2a be the number of the first inclined convex portions in the right region. 10. The absorbent according to claim 9, wherein the ratio q1 and the ratio q2 defined by the following formulas (1) and (2) are each 10% or less when the number of the second inclined convex portions in the region is q2b. Goods.

The uneven region has a non-inclined convex portion in addition to the inclined convex portion,
The non-inclined projection according to any one of claims 1 to 10 , wherein the non-inclined projection protrudes toward the wearer's skin, and the apex is located at a central position between both ends of the non-inclined projection in the width direction. The absorbent article described.

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