TW201929815A - Absorbent article - Google Patents

Abstract

An absorbent article (100) has an elastic region (20) in which an elastic member (19) is disposed at least in the center section in the width direction (Y) of a dorsal side section (B), the elastic member (19) extending in the width direction (Y), and has an inelastic region (25), in which the elastic member (19) is not disposed, between the elastic region (20) and an absorbent core (14a) in the longitudinal direction (X). A top sheet (12) has a raised-and-recessed region (F) at a position overlapping the inelastic region (25). The raised-and-recessed region (F) has vertical grooves (51) which pass between a plurality of protrusions (41) and are continuous in the longitudinal direction (X), the protrusions (41) being formed in a prescribed pattern, and has horizontal grooves (55) which pass between the plurality of protrusions (41) and are continuous in the width direction (Y). The extent to which the vertical grooves (51) meander is greater than that of the horizontal grooves (55).

Description

Absorbent article

The invention relates to an absorbent article such as disposable diapers, urine-absorbing pads, incontinence pads, menstrual pads and the like.

Previously, the following techniques have been known: for the purpose of suppressing the flow of excreta on the front sheet or controlling the direction of the flow to a specific direction, the skin in the front sheet of absorbent articles such as disposable diapers It has a three-dimensional shape toward the surface. For example, the applicant previously proposed that the laminated first sheet and the second sheet are joined to each other in a plurality of joints, and the first sheet is away from the second sheet at a position other than the joint The composite sheet that protrudes in the direction to form a convex portion that protrudes toward the skin side of the wearer is used as the front sheet of the absorbent article (Patent Document 1).

Also, in the pant-type disposable diaper, it is known to arrange an elastic member extending in the width direction of the diaper between the waist opening and the leg opening. For example, the applicant has previously proposed an absorbent article having a pair of left and right side telescopic regions between the waist opening and the leg opening in the ventral and / or back sides, There is no absorber on the waist opening side from the center position of the side expansion region (Patent Document 2). [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2017-93732 Patent Document 2: Japanese Patent Laid-Open No. 2007-29479

The present invention is an absorbent article comprising a front sheet having a concave-convex area, a back sheet, and an absorbent core disposed between the two sheets, and having a length direction corresponding to the front-back direction of the wearer and the The width direction is orthogonal to the longitudinal direction, and has a ventral portion disposed on the ventral side of the wearer, a backside portion disposed on the back side of the wearer, and a lower crotch located therebetween. The absorbent article of the present invention is provided in at least the central portion in the width direction of the back side portion, and has an elastic region in which an elastic member extending in the width direction is disposed, and the elastic region in the longitudinal direction and the absorption There is a non-elastic region where the elastic member is not arranged between the sexual cores. The front surface sheet has uneven areas at a portion overlapping with the inelastic area. The concave-convex area is formed by a convex pattern protruding toward the wearer's skin side in a specific pattern, and has a longitudinal groove portion that is continuous in the longitudinal direction through a plurality of the convex portions, and a plurality of the convex portions between the convex portions The lateral groove portion continuous in the width direction. The longitudinal groove portion is more meandering than the lateral groove portion.

Absorbent articles such as disposable diapers have a situation in which excreta such as fluid stools move from the end of the absorbent core on the back side to the waist peripheral side of the back side and are not absorbed by the absorbent core. Leakage, so it is required to prevent the leakage of such excreta. The absorbent articles of Patent Document 1 and Patent Document 2 still have room for improvement in preventing the leakage of the excrement in the back side portion.

The present invention relates to an absorbent article that can eliminate the disadvantages of the aforementioned prior art.

Hereinafter, the present invention will be described based on preferred embodiments of the present invention while referring to the drawings. 1 and 2 show the basic structure of a disposable diaper 100 (hereinafter, also simply referred to as diaper 100) as an embodiment of the absorbent article of the present invention. As shown in FIGS. 1 and 2, the diaper 100 includes a liquid-permeable front sheet 12, a liquid-impermeable back sheet 13, and an absorber 14 disposed between the two sheets 12 and 13. Regarding the back sheet 13, the so-called liquid impermeability refers to the concept of liquid impermeability. In addition to the case where the back sheet 13 does not allow liquid to pass through at all, it also includes the case composed of a water-repellent sheet. Wait.

The diaper 100 has a longitudinal direction X corresponding to the front-rear direction of the wearer, and a width direction Y orthogonal to the longitudinal direction X in a state where the diaper 100 is flatly spread as shown in FIG. 1. In addition, the diaper 100 has a ventral portion A disposed on the ventral side of the wearer when worn in the longitudinal direction X, a backside portion B disposed on the back side of the wearer when worn, and located on the ventral side A and the backside The lower part of the crotch between B and C. In the diaper 100 of this embodiment, the crotch portion C shrinks inward in the width direction Y, and the length of the crotch portion C in the width direction Y is shorter than the length in the width direction Y of the ventral portion A and the back portion B. The diaper 100 is an unfolded disposable diaper, and a hook-and-loop fastener 17 is provided on both sides of the back side B, and a fastening area 18 for fixing the hook-and-loop fastener 17 is provided on the outer surface of the ventral side A.

The absorber 14 in the diaper 100 includes an absorbent core 14a and a core-wrap material 14b that wraps the absorbent core 14a. The absorbent core 14a can be composed of, for example, a fiber pile of liquid-absorbent fibers such as pulp fibers or a mixed fiber pile of liquid-absorbent fibers and a water-absorbing polymer. Examples of the liquid-absorbing fibers include cellulose-based hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate. In addition to cellulose-based hydrophilic fibers, fibers made of synthetic resins such as polyolefins, polyesters, and polyamides, which are made hydrophilic by surfactants or the like, can also be used. As the chip wrapping 14b, for example, toilet paper or water-permeable non-woven fabric is used. The chip-coated material 14b may wrap the entire absorbent core 14a with one piece, or may combine two or more pieces to wrap the absorbent core 14a. As the back sheet 13, a liquid-impermeable or water-repellent resin film, a laminated sheet of resin film and non-woven fabric, or the like is used.

On both sides of the diaper 100 in the longitudinal direction X, a sheet 15 for forming three-dimensional pleats having an elastic member 15a for three-dimensional pleats is arranged, and by contraction of the elastic member 15a for three-dimensional pleats, the crotch portion in a worn state C, forming a three-dimensional fold that rises toward the wearer's skin side. Furthermore, in the portion of the lower crotch C where the leg circumference is arranged, the leg elastic member 16 is arranged in an elongated state, and by contraction, the lower crotch C in the worn state forms a garment that enhances the wearer's leg circumference Sexual leg folds.

The diaper 100 is attached to at least the central portion in the width direction Y of the back side portion B, and has an elastic region 20 in which elastic members 19a and 19b extending in the width direction Y are arranged. The elastic region 20 is a region that expands and contracts in the width direction Y along the circumference of the waist. As shown in FIG. 3, it has a waist elastic region 22 disposed on the side of the waist periphery and a longer elastic region in the longitudinal direction X 22 is the elastic region 24 on the waist side of the absorbent core 14a. The waist elastic region 22 has a waist elastic member 19a that extends across the entire region of the elastic region 22 in the width direction Y. The waist-side elastic region 24 has a waist-side elastic member 19b shorter than the length of the waist elastic member 19a, and is disposed on both sides of the absorbent core 14a in the width direction Y. Hereinafter, the waist elastic member 19 a and the waist-side elastic member 19 b are also collectively referred to as an elastic member 19.

The elastic region 20 is fixed in an expanded state by elastic members 19 a and 19 b extending in the width direction Y, and expands and contracts in the width direction Y. In this embodiment, the elastic region 20 is formed by folding a rectangular base material sheet 21a in half and overlapping two pieces, and a plurality of elastic members 19a, 19b including rubber threads and the like are joined in an extended state between the two sheets The fixed sheet piece 21 (see FIG. 1) is formed. The sheet piece 21 is a rectangular one having a length direction of the sheet piece 21 and a width direction orthogonal thereto. The sheet piece 21 includes a first elastic member 19a arranged so as to extend in one direction over the entire area of the longitudinal direction of the base material sheet 21a, and a region only in front of the longitudinal direction of the base material sheet 21a and There are two types of second elastic members 19b arranged in such a manner that the rear region extends in one direction. In the elastic region 20, the first elastic member 19a becomes a waist elastic member, and the second elastic member 19b becomes a waist-side elastic member 19b. The second elastic member 19b is made inelastic in the center region of the base material sheet 21a in the longitudinal direction. In the diaper 100 of this embodiment, the sheet sheet 21 is arranged between the absorber 14 and the back sheet 13, and the sheet sheet 21 is joined to the front sheet 12 and the back sheet 13. The elastic region 20 may be formed by sandwiching and fixing a plurality of elastic members by the front sheet 12 and the back sheet 13 in an expanded state.

The diaper 100 has a non-elastic region 25 in which the elastic member 19 is not disposed between the elastic region 20 in the longitudinal direction X and the absorbent core 14a. More specifically, as shown in FIG. 3, the diaper 100 has a non-elastic region 25 in the longitudinal direction X between the waist elastic region 22 and the end 14a1 on the back side B side of the absorbent core 14a. The non-elastic region 25 is disposed between the pair of waist-side elastic regions 24 on both sides of the absorbent core 14a in the width direction Y.

The front sheet 12 has a concave-convex area F at a portion overlapping the inelastic area 25. The front sheet 12 in the disposable diaper 100 of this embodiment is composed of the composite sheet 10 having the concave-convex area F shown in FIG. 4. As shown in FIG. 4, the composite sheet 10 of this embodiment has a central region M located in the center of the width direction Y and one of the opposite regions S, S located on both sides of the central region M, and includes the central region M The entire composite sheet 10 of the pair of side regions S, S has an uneven region F. The uneven region in the central region M is also referred to as a central uneven region F1, and the uneven region in the side region S is referred to as a side uneven region F2. In addition, the central concavo-convex area F1 and the side concavo-convex area F2 are collectively referred to as "concavo-convex area F". In this embodiment, the inelastic region 25 overlaps the central uneven region F1.

As shown in FIG. 4, the concave-convex area F including the central concave-convex area F1 and the pair of side concave-convex areas F2 is formed with a plurality of convex portions 4 including fiber sheets such as nonwoven fabric. Hereinafter, the convex portion 4 in the central concave-convex area F1 is also referred to as a central convex portion 41, and the convex portion 4 in the side concave-convex area F2 is also referred to as a side convex portion 43. As shown in FIG. 4, the central convex portion 41 in the central concave-convex region F1 is formed by a specific pattern. The central concavo-convex region F1 has a longitudinal groove 51 continuous between the plurality of central convex parts 41 in the longitudinal direction X, and a lateral groove 55 continuous between the plurality of central convex parts 41 in the width direction Y.

As shown in FIG. 8 (c), the central concave-convex region F1 in this embodiment has ring-shaped concave portions 36 that respectively surround the central convex portions 41 formed by a specific pattern. Further, the central concave-convex region F1 is a plurality of annular concave portions 36 continuous in the longitudinal direction X and the width direction Y. As shown in FIG. 8 (c), the annular concave portion 36 surrounding each convex portion has a pair of longitudinal portions 36a located on both sides in the width direction Y of the central convex portion 41 and two located in the longitudinal direction X of the central convex portion 41 One of the sides is the horizontal portion 36b, and one end of the vertical portion 36a is joined to the center of the horizontal portion 36b. The annular concave portions 36 adjacent in the width direction Y share the longitudinal portions 36a between the central convex portions 41 adjacent in the width direction Y. The annular concave portions 36 adjacent in the longitudinal direction X share the horizontal portions 36b between the central convex portions 41 adjacent in the longitudinal direction X.

FIG. 8 (a) is a plan view showing the central region M of the composite sheet 10 cut squarely at a specific length. As shown in FIG. 8 (a), the longitudinal groove portion 51 is formed by continuing a part of the plurality of annular concave portions 36 adjacent in the longitudinal direction X. Specifically, the longitudinal groove portion 51 is formed according to a half of a horizontal portion 36b, a longitudinal portion 36a coupled to the one horizontal portion, a half portion of the other horizontal portion 36b coupled to the one longitudinal portion, and the The order of the other vertical portions 36a of the other horizontal portions is continuous along the longitudinal direction X. As shown in FIG. 8 (a), the lateral groove portion 55 is formed by continuing a part of the plurality of annular concave portions 36 adjacent in the width direction Y to each other. Specifically, the lateral groove portion 55 is an annular concave portion 36 adjacent in the width direction Y, and the lateral portions 36b adjacent in the width direction Y are coupled to each other and continuous in the width direction Y. In this way, the vertical groove portion 51 and the horizontal groove portion 55 are continuous by a portion of each of the plurality of central convex portions 41 around each.

As shown in FIG. 8 (a), the vertical groove portion 51 and the horizontal groove portion 55 meander respectively. The longitudinal groove portion 51 has a greater meandering width direction Y than the lateral groove portion 55. The magnitude of the meandering degree can be determined by the following measurement, for example. Regarding the vertical groove portion 51, the length of each groove portion 51, 55 existing in the area of a square whose length L is a specific length is measured along the vertical groove portion 51, and regarding the horizontal groove portion 55, along the horizontal groove portion 55 Measuring the length of each groove portion 51, 55 existing in the area of the square where the length L of one side is a specific length [refer to FIG. 8 (b)]. Let these measured lengths be the meandering length L5 of the longitudinal groove portion 51 and the meandering length L7 of the lateral groove portion 55. It is determined that the greater the ratio of the meandering length of the grooves 51, 55 to the length L of one side, the greater the degree of meandering, and the smaller the ratio of the meandering length of the grooves 51, 55 to the length L of one side, the more meandering The smaller the serpentine degree. The length L of one side is set to be longer than the distance between the adjacent convex portions 4 in the longitudinal direction X and the distance between the adjacent convex portions 4 in the width direction Y, preferably 20 mm. When it is not possible to set a square area with a side length L of 20 mm on the concavo-convex area, set a side area with a length L as close to a 20 mm square as possible. The setting of the square area and the measurement of the meandering lengths L5 and L7 of the groove portions 51 and 55 are also preferably performed by image processing of the image of the concavo-convex area taken with a digital camera or the like. The meandering length L5 of the vertical groove portion 51 in this embodiment is longer than the meandering length L7 of the horizontal groove portion 55.

The diaper 100 has an elastic region 20 and an inelastic region 25 on the back side portion B, and has a central uneven region F1 where the front sheet 12 overlaps the inelastic region 25, and the longitudinal groove portion 51 of the uneven region F1 bends The serpentine degree is greater than that of the lateral groove portion 55. With this configuration, as shown in FIGS. 9 and 10, the diaper 100 can form the bag portion P at a portion where the non-elastic region 25 and the uneven region F overlap. More specifically, the non-elastic region 25 is arranged between the elastic region 20 (waist elastic region 22) and the absorbent core 14a, but it has a lower rigidity than the portion where the absorbent core 14a is arranged, and is relative to the width direction Y Easy to buckle. On the other hand, in the front sheet 12, the longitudinal groove 51 in the concavo-convex area F has a greater meandering degree than the horizontal groove 55, and the length measured along the groove is also longer. The bending rigidity in the direction X decreases along the width direction Y, so it tends to buckle with respect to the width direction Y. The diaper 100 has the non-elastic region 25 and the uneven region F overlapped as described above, and the diaper 100 flexes with respect to the width direction Y in the overlapped portion, thereby forming a non-skin facing surface as shown in FIG. The pocket P of the side depression. The bag portion P captures the excrement that moves to the waist peripheral side side of the absorbent core 14a side of the back side portion B to the concave portion, so the leakage of the excrement in the back side portion B can be effectively suppressed. Hereinafter, this effect is also referred to as a leakage prevention effect.

From the viewpoint of more surely exerting the above-mentioned leakage prevention effect, the meandering length L5 of the vertical groove portion 51 is preferably 110% or more and more preferably 120% or more with respect to the meandering length L7 of the lateral groove portion 55. It is preferably 300% or less, more preferably 200% or less, and preferably 110% or more and 300% or less, and more preferably 120% or more and 200% or less. When the length L of the above side is set to 20 mm, the meandering length L5 of the longitudinal groove portion 51 is preferably 25 mm or more, more preferably 30 mm or more, and further preferably 80 mm or less, more preferably 60 mm or less, and preferably 25 mm or more and 80 mm or less, and more preferably 30 mm or more and 60 mm or less.

From the viewpoint of increasing the degree of meandering of the vertical groove portion 51, the central convex portion 41 preferably has a length L1 in the width direction Y that is longer than a length L2 in the length direction X. The central convex portion 41 is a ratio (L1 / L2) of the length L1 in the width direction Y [refer to FIG. 6 (a)] to the length L2 in the length direction X [refer to FIG. 6 (b)] is preferably 1.1 or more, more preferably 1.5 or more, preferably 6.0 or less, more preferably 4.0 or less, and more preferably 1.1 or more and 6.0 or less, more preferably 1.5 or more and 4.0 or less. The length L1 of the central convex portion 41 in the width direction Y is preferably 3 mm or more, more preferably 5 mm or more, and more preferably 30 mm or less, more preferably 15 mm or less, and still more preferably 3 mm or more 30 mm or less, more preferably 5 mm or more and 15 mm or less.

As described above, the bag portion P is formed in the portion where the non-elastic region 25 and the uneven region F overlap. Hereinafter, the portion Pa (see FIG. 11) where the non-elastic region 25 and the uneven region F overlap is also referred to as a planned bag portion Pa. From the viewpoint of easy formation of the bag portion P, the planned bag portion Pa is the ratio (W1 / LP) of the length W1 (see FIG. 11) in the width direction Y to the length LP (see FIG. 11) in the longitudinal direction X It is preferably 1 or more, more preferably 2 or more, and more preferably 15 or less, more preferably 10 or less, and further preferably 1 or more and 15 or less, more preferably 2 or more and 10 or less. The length LP of the longitudinal direction X of the predetermined portion Pa of the bag is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 80 mm or less, more preferably 60 mm or less, and still more preferably 10 mm or more 80 mm or less, more preferably 15 mm or more and 60 mm or less. The length W1 in the width direction Y of the predetermined portion Pa of the bag is approximately equal to the length W5 in the width direction Y of the absorbent core 14a, or slightly shorter. Furthermore, the length W5 (see FIG. 11) of the width direction Y of the absorbent core 14a is the maximum length of the width direction Y of the absorbent core 14a in the back side portion B.

In the concavo-convex area F of the present embodiment, the stacked first sheet 1 and second sheet 2 are bonded to each other in the plurality of bonding portions 3, and the first sheet 1 is away from the bonding portion 3 at a position Two sheets 2 protrude in the direction to form a central convex portion 41. Furthermore, in this embodiment, as shown in FIG. 6, the composite sheet 10 constituting the concave-convex area F of the front sheet 12 is substantially flat on the second sheet 2 side, and on the first sheet 1 side, by The ring-shaped concave portion 36 between the portion 4 and the convex portion 4 is formed with irregularities with large fluctuations.

Preferably, the front sheet 12 is located in the central concave-convex region F1, as shown in FIGS. 4 and 5, has a convex row R1 where the convex portions are arranged along the longitudinal direction X, and the central convex in the convex row R1 Between the parts 41 and 41, there are parts 31 and 32 that are densified by embossing. In this embodiment, as the portions 31 and 32 that are densified by embossing, there is a first joining portion 31 that is fused between the first sheet 1 and the second sheet 2 by heat embossing In the same way, the second bonding portion 32 is fused between the first sheet 1 and the second sheet 2 by heat embossing. The annular concave portion 36 is formed by a first bonding portion 31 having a shape longer in the longitudinal direction X and a second bonding portion 32 formed intermittently in the width direction Y.

As shown in FIGS. 7 (a) and 7 (b), one of the side regions S, S of the composite sheet 10 in this embodiment has a side concave-convex region F2 formed with a side convex portion 43 in a zigzag arrangement. The portion 43 is a convex portion 4 formed as the first sheet 1 protruding in a direction away from the second sheet 2 at a portion other than the joining portion 3, and the length in the width direction Y is shorter than the central convex portion 41 in the central region M. In the side concave-convex region F2, the bonding portion pair 34 and the side convex portions 43 including a pair of bonding portions 35 and 35 close to each other are arranged at regular intervals in the width direction Y, and are alternately arranged at fixed intervals in the width direction The composite row J2, the side convex portions 43, and the pair of joint portions 34 are formed alternately at regular intervals in the longitudinal direction X, and the longitudinal composite rows J1 are formed so as to form a plurality. In this way, the side regions S and S have the side convex portions 43 formed in a different pattern from the center region M.

As shown in FIG. 12, the side concave-convex region F2 of the side regions S and S has a longitudinal groove portion 52 continuous in the longitudinal direction X through a plurality of side convex portions 43 and a width direction through a plurality of side convex portions 43 YContinuous horizontal groove 56. As described above, the side regions S and S are formed with the side convex portions 43 in a different pattern from the central region M, and the vertical groove portions 52 and the lateral groove portions 56 in the regions S and S also have different patterns from the central region M form. In addition, the lateral groove portions 56 in the side regions S and S are the same as the vertical groove portions 52 of the side regions S and S, or meander more than the vertical groove portions 52 (see FIG. 12). With this configuration, the side regions S, S can be easily bent in the longitudinal direction X, and a pair of blocking structure portions Pb, Pb that bulge toward the skin side are formed on both sides of the bag portion P in the width direction Y to further improve Leak prevention effect (refer to Figure 9). The degree of meandering of the longitudinal groove portion 52 and the lateral groove portion 56 of the side regions S, S can be obtained by the following method. As with the meandering length L5 of the longitudinal groove portion 51 and the meandering length L7 of the lateral groove portion 55 in the central concave-convex area F1, each of the groove portions 52 existing in a square area where the length L of one side is a specific length The length of 56. Let these measured lengths be the meandering length of the longitudinal groove portion 52 and the meandering length of the lateral groove portion 56. In the side regions S and S, the meandering length of the vertical groove portion 52 is preferably equal to or less than the meandering length of the lateral groove portion 56 and more preferably shorter than the meandering length of the lateral groove portion 56.

From the viewpoint of making the lateral groove portion 56 meander more than the vertical groove portion 52 in the side regions S, S, it is preferable that the range 35c where the joining portion 35 is provided between the adjacent side convex portions 43 The length L9 of the width direction Y is longer than the length L8 of the length direction X [refer to FIG. 7 (a)]. For example, in the present embodiment, one bonding portion 35 is formed between the side convex portions 43 adjacent in the longitudinal direction X and two bondings are formed between the adjacent side convex portions 43 in the width direction Y in the present embodiment. The portion 35 (joint portion pair 34) is provided between the adjacent side convex portions 43 in the area where the width direction Y is longer than the longitudinal direction X. The length L8 of the longitudinal direction X of the range 35c where the joint 35 is provided is the length of the longitudinal direction X of the range 35c where the joint 35 exists between the adjacent side convex portions 43 in the longitudinal direction X, and the range 35c where the joint 35 is provided The length L9 of the width direction Y is the length of the width direction Y of the range 35c where the joining portion 35 exists between the adjacent side convex portions 43 in the width direction Y.

From the viewpoint of easily forming the above-mentioned shutoff structure portions Pb, Pb, it is preferable that the meandering degree of the longitudinal groove portion 52 in the side regions S, S is smaller than that of the meandering groove portion 51 in the central region M degree. The degree of meandering of the groove portions 51 and 52 can be obtained by measuring the length of the groove portions 51 and 52 existing in a square area where the length L of one side is a specific length as described above. The square areas are set to the side areas S, S and the central area M, respectively, and the meandering lengths of the groove portions 51 and 52 are obtained.

The diaper 100 is attached to both sides of the non-elastic region 25 in the width direction Y, and has a pair of waist-side elastic regions 24. The waist-side elastic region 24 partially overlaps the side regions S, S of the composite sheet 10. That is, the waist-side elastic member 19b partially overlaps the side regions S, S of the composite sheet 10. With this configuration, the above-mentioned shutoff structure portion Pb can be easily formed, and the leakage prevention effect can be further improved. In this way, it is preferable that at least a part of the side regions S and S of the composite sheet 10 overlap the elastic region 20.

The three-dimensional folds in the diaper 100 are formed by the elastic members 15a for three-dimensional folds contracted in the longitudinal direction X, and are formed so as to rise toward the wearer's skin side, and the three-dimensional folds are joined to the side regions S, S of the front sheet 12 The fixed end of the sheet 15 for wrinkle formation. The diaper 100 is formed by joining the sheet 15 for forming three-dimensional wrinkles, and the side regions S, S are easily flexed in the longitudinal direction X, and the elastic member 15a for three-dimensional wrinkles contracted in the longitudinal direction X is more likely to flex in the longitudinal direction X The bag portion P can be easily formed in the back side portion B. Furthermore, as shown in FIG. 9, since the three-dimensional wrinkles are formed on both side edges of the bag portion P in the width direction Y, the leakage prevention effect can be further improved.

The diaper 100 is attached to at least the central portion of the back side portion B in the width direction Y, and has an inelastic region 25 which overlaps the central uneven region F1 of the composite sheet 10 used as the front sheet 12. In addition, in the diaper 100, the front sheet 12 is arranged so that the central portion of the absorber 14 in the width direction Y overlaps with the central region M. The central convex portion 41 of the central concave-convex region F1 is arranged in a zigzag shape as shown in FIG. 4. With this configuration, since the side portion of the central concave-convex region F1 is easily bent in an oblique direction toward the end side of the back side portion B with respect to the width direction Y, the formation of irregular wrinkles in the pocket portion P is effectively suppressed To improve the formability of the bag P. In this way, it is preferable that the convex portion 4 is formed in a zigzag arrangement in the uneven region F.

The absorbent core 14a of this embodiment is provided in the back side portion B, and has a pair of corner portions 14c on both sides in the width direction Y. As shown in FIG. 11, the corner portion 14c of the back side portion B is formed so that its outline is inclined from the outside in the width direction Y toward the inside. With this configuration, since the shutoff structure portion Pb extends in the longitudinal direction X to the boundary between the corner portion 14c of the absorbent core 14a and the side edge 14d, the leakage prevention effect can be improved. In this manner, it is preferable that the absorbent core 14a cut the corner portion 14c of the back side portion B at an angle.

Like the first sheet 1 of the composite sheet 10 in this embodiment, as the fiber sheet forming the convex portion 4, for example, a non-woven fabric, a woven fabric, a knitted fabric, or the like is used, preferably a non-woven fabric. As the second sheet 2 partially joined to the first sheet 1 to form the composite sheet 10, a sheet material including various materials such as fiber sheets or films such as nonwoven fabric, woven fabric, and knitted fabric is used. The types of sheet materials constituting the first sheet 1 and the second sheet 2 may be the same or different. The sheet material constituting the second sheet 2 may be mesh or the like.

When a nonwoven fabric is used as the sheet material constituting the first sheet 1 or the second sheet 2, examples of the nonwoven fabric include hot air nonwoven fabric, spunbonded nonwoven fabric, spunlace nonwoven fabric, meltblown nonwoven fabric, and resin binder Non-woven fabric, needle punched non-woven fabric, etc. A laminate obtained by combining two or more kinds of these nonwoven fabrics or a laminate formed by combining these nonwoven fabrics with a film or the like can also be used. Among these, it is preferable to use hot air nonwoven fabric or 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 further preferably 40 g / m ² or less, more preferably 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, and more preferably 15 g / m ² or more and 35 g / m ² or less.

As the fibers constituting the nonwoven fabric, fibers containing various thermoplastic resins can be used. Examples of the thermoplastic resin include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyamides such as nylon 6 or nylon 66, polyacrylic acid, polyalkyl methacrylate, and polychloride Ethylene, polyvinylidene chloride, etc. One of these resins can be used alone or as a blend of two or more. In addition, it can be used in the form of core-sheath type or side-by-side type composite fibers.

If the central concave-convex region F1 of the front sheet 12 in this embodiment is further explained, as shown in FIG. 5, the central convex portion 41 in the concave-convex region F1 is formed as a horizontally elongated central convex portion 41 as shown in FIG. The state is dispersed in the longitudinal direction X and the width direction Y. More specifically, as shown in FIG. 4, the central convex portions 41 are arranged in a zigzag shape, and a plurality of central convex portions 41 are formed in series along the longitudinal direction X at fixed intervals in a longitudinal direction row R1 formed in the width direction Y There are a plurality of rows, and the rows of longitudinal convex portions R1 adjacent to each other in the width direction Y are arranged so that the arrangement position of the central convex portions 41 is shifted by a half pitch in the longitudinal direction X. In addition, the central convex portions 41 of the longitudinal convex row R1 adjacent in the width direction Y overlap so that a part of them are alternately arranged in the longitudinal direction X. Further, in the central concave-convex region F1, a plurality of central convex portions 41 are formed in series along the width direction Y at a fixed interval, and a plurality of rows are formed in the longitudinal direction X.

Between the central convex portions 41 adjacent in the longitudinal direction X in the longitudinal convex row R1, as shown in FIG. 5, there is formed a first lengthwise length of the longitudinal direction X that is longer than the length a of the width direction Y Joint part 31. In addition, the first joint portion 31 is located between the central convex portions 41 adjacent in the width direction Y in the widthwise convex portion row R2. The first bonding portion 31 between the central convex portions 41 adjacent in the width direction Y is the first bonding portion 31 between the central convex portions 41 in the longitudinal convex portion row R1 adjacent in the width direction. The lengthwise first joint portion 31 is preferably 1.2 times or more, more preferably 1.5 times or more, and more preferably 5.0 times or less, and more preferably 3.0 times the length b of the longitudinal direction X and the length a of the width direction Y. Times or less, and preferably 1.2 times or more and 5.0 times or less, and more preferably 1.5 times or more and 3.0 times or less.

In addition, each central convex portion 41 is surrounded by the first joining portion 31 and the second joining portion 32 whose length in the longitudinal direction is shorter than the first joining portion 31. Each central convex portion 41 is surrounded by four or more joint portions 3, and a concave portion surrounding each central convex portion 41 is formed. In addition, the concave portions surrounding the plurality of central convex portions 41 are continuous with each other, and a continuous concave portion in a mesh shape is formed in a portion other than the central convex portion 41 in the concave-convex area F. If the junction of the first sheet 1 and the second sheet 2 is collectively referred to as the junction 3, the number of junctions 3 surrounding each central convex portion 41 is preferably 4 or more, more preferably 8 or more, and , Preferably 20 or less, more preferably 16 or less. The joining portions 3 are preferably a pair sandwiching the central convex portion 41 from both sides in the longitudinal direction X or a pair sandwiching the central convex portion 41 from both sides in the width direction Y.

The length d of the second bonding portion 32 in the longitudinal direction X is preferably the length b of the first bonding portion 31 in the longitudinal direction, preferably 20% or more and 85% or less, and more preferably 30% or more and 70% or less. The length c of the second joining portion 32 in the width direction Y is preferably the length a of the first joining portion 31 in the width direction Y of 0.8 or more and 1.2 or less, and more preferably 0.9 or more and 1.1 or less.

Preferably, between the central convex portions 41 or the lateral convex portions 43, there is a compaction in which the first sheet (sheet material) forming the central convex portions 41 or the lateral convex portions 43 is partially densified As in the present embodiment, when the central convex portion 41 or the lateral convex portion 43 is formed of the composite sheet 10 having the joining portion 3 of the first sheet 1 and the second sheet 2, it is preferable that the The joining portion is a portion that is locally pressed and densified by embossing or the like.

From the viewpoint of further exerting the effect of making the central concave-convex region F1 easier to buckle in the width direction Y, and further exerting the effect of capturing excreta from the concave portion between the central convex portions 41, the height H1 of the central convex portion 41 a)] preferably 0.6 mm or more, more preferably 1.0 mm or more, and more preferably 5.0 mm or less, more preferably 4.0 mm or less, and further preferably 0.6 mm or more and 5.0 mm or less, more preferably 1.0 mm Above 4.0 mm. From the viewpoint of further exerting the side concave-convex regions F2 and F2 to buckle in the longitudinal direction X, the height H3 of the side convex portions 43 [see FIG. 7 (b)] is preferably 0.5 mm or more, more preferably 1.0 mm or more, In addition, it is preferably 5.0 mm or less, more preferably 4.0 mm or less, and more preferably 0.5 mm or more and 5.0 mm or less, more preferably 1.0 mm or more and 4.0 mm or less.

In the case where the concave-convex area F is formed by the composite sheet 10 having the joining portion 3 of the first sheet 1 and the second sheet 2, the height of the convex portion 4 is defined from the lower surface of the second sheet 2 to the first The distance to the upper surface of the sheet 1 [refer to FIG. 6 and FIG. 7 (b)]. In addition, the height was set to a value obtained by observing the cross section of each convex portion using a digital microscope (manufactured by Keyence) and measuring the shortest distance between the lower surface of the second sheet 2 and the top of the convex portion. In the case where the concavo-convex area F is formed of a single layer of sheet material, the height of the convex portion is such that the straight line connecting the tops of the adjacent convex portions in the longitudinal direction X to the convex portion of the sheet material The height difference of the lower surface of the part farthest from the straight line is set as the height of the convex portion.

In order to manufacture the composite sheet 10 having the above-described structure, the first sheet 1 in a band shape is supplied to the peripheral surface to be in an intermeshing shape in the same manner as the method described in Japanese Patent Laid-Open No. 2015-112343 or Patent Document 1. After the first sheet 1 is deformed into an uneven shape between the first roll and the second roll, after moving the first sheet 1 along the self-engaging portion of the peripheral surface of the first roll, the second sheet 2 The first sheet 1 is fed so that the two sheets 1 and 2 are nipped between the convex portion of the first roller and the heating roller under heating to be partially joined. In addition, at this time, the pattern of the irregularities of the first roller and the second roller and the joint portion formed by the first roller and the heating roller are different between the center and the side of the first sheet. Furthermore, when the first sheet 1 is deformed into a concave-convex shape by biting into the meshing portion of the first roll and the second roll, it is preferable to suck the first sheet toward the inside of the roll to promote the first sheet The deformation of the material 1 to the uneven shape.

In the above, the present invention has been described based on the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments and can be appropriately changed. For example, the composite sheet 10 used for the front sheet 12 may not have side regions S, S in which convex portions are formed in a pattern different from that of the central region M, or may cover the entire region, and will have the same configuration as the central region M The composite sheet 10 is used as the front sheet 12. In the above embodiment, as shown in FIG. 4, the concave-convex area F having the central convex portion 41 is formed to extend over the entire length in the longitudinal direction of the diaper 100, but the absorbent article of the present invention has the convex portion 4 The concavo-convex region F only needs to be formed on the back side portion B, for example, it may be formed only on the back side portion B and the crotch portion C, or only on the back side portion B and the ventral portion A.

In addition, the shape of the joint portion 3 or other joint portions surrounding the convex portion 4 and the arrangement of the joint portions can be appropriately determined. In addition to a rectangular or square shape, the shape of each joint may be any shape such as a circle, an ellipse, an oval, a triangle, a quadrangle, a pentagon, a hexagon, a star, or a heart. In addition, the absorbent article of the present invention can replace the unfolded disposable diaper, but it is a shorts type (pull-on type) disposable diaper, or it can also be a shorts type or a normal non-shorts type menstrual sanitary napkin. Can also be incontinence pads, sanitary pads, etc.

Regarding the above embodiment, the present invention further discloses the following absorbent articles. <1> An absorbent article comprising a front sheet having a concave-convex area, a back sheet, and an absorbent core disposed between the two sheets, and having a length direction corresponding to the front and back directions of the wearer and the The width direction orthogonal to the longitudinal direction, and having a ventral portion disposed on the ventral side of the wearer, a back portion disposed on the back side of the wearer, and a lower crotch portion located between them, on the back side portion At least a central portion in the width direction has an elastic region in which an elastic member extends in the width direction, and an inelasticity in which the elastic member is not disposed between the elastic region in the longitudinal direction and the absorbent core Area, the front sheet has a concave-convex area at a position overlapping the non-elastic area, the concave-convex area is formed by a convex pattern protruding toward the wearer's skin side in a specific pattern, and has a plurality of convex areas between The longitudinal groove portion that is continuous in the longitudinal direction and the lateral groove portion that is continuous in the width direction through a plurality of the convex portions have a greater degree of meandering than the lateral groove portion.

<2> The absorbent article as described in <1> above, in which the length L5 measured along the longitudinal groove portion of the longitudinal groove portion existing in a square with a length L of a certain length on one side is more present in the area The length L7 of the above-mentioned horizontal groove portion measured along the horizontal groove portion is long. <3> The absorbent article according to the above <2>, wherein the length L5 of the longitudinal groove portion measured along the longitudinal groove portion existing in the area of the square whose length L is a specific length on the side is relative to the presence in The length L7 of the lateral groove portion measured along the lateral groove portion in this region is 110% or more, preferably 120% or more, and also 300% or less, preferably 200% or less, and is 110 % Or more and 300% or less, preferably 120% or more and 200% or less. <4> The absorbent article as described above in <2> or <3>, wherein the length L5 measured along the longitudinal groove portion of the longitudinal groove portion existing in the area of a square with a side of 20 mm is 25 mm or more It is preferably 30 mm or more, and 80 mm or less, preferably 60 mm or less, and 25 mm or more and 80 mm or less, preferably 30 mm or more and 60 mm or less. <5> The absorbent article according to any one of the above <1> to <4>, wherein the longitudinal groove portion and the lateral groove portion are continuous by a portion of each of the plurality of convex portions. <6> The absorbent article according to any one of the above <1> to <5>, wherein the convex portion is longer in the width direction than in the longitudinal direction. <7> The absorbent article according to any one of the above <1> to <6>, wherein the convex portion is a ratio of the length L1 of the width direction Y to the length L2 of the length direction X (L1 / L2) is 1.1 or more, preferably 1.5 or more, and 6.0 or less, preferably 4.0 or less, and 1.1 or more and 6.0 or less, preferably 1.5 or more and 4.0 or less. <8> The absorbent article according to any one of the above <1> to <7>, wherein the portion Pa where the non-elastic region and the uneven region overlap is the length W1 of the width direction relative to the length LP of the longitudinal direction The ratio (W1 / LP) is 1 or more, preferably 2 or more, and is 15 or less, preferably 10 or less, and is 1 or more and 15 or less, preferably 2 or more and 10 or less. <9> The absorbent article according to any one of the above <1> to <8>, wherein the widthwise length W1 of the portion Pa where the non-elastic region and the uneven region overlap the widthwise direction of the absorbent core The length W5 is approximately equal or slightly longer. <10> The absorbent article according to any one of the above <1> to <9>, wherein the front sheet has a pair of side regions located on both sides of the center region in the width direction, the side regions each having In the convex portion, the vertical groove portion, and the lateral groove portion formed in a pattern different from the central area, the degree of meandering of the lateral groove portion in the side area is equal to or greater than that of the vertical groove portion.

<11> The absorbent article according to the above <10>, wherein in the side region, the length of the longitudinal groove portion measured along the longitudinal groove portion existing in a square with a length L of a certain length on one side It is the length of the said lateral groove part existing in this area measured along the lateral groove part or less. <12> The absorbent article according to the above <10> or <11>, wherein in the side area, the longitudinal groove portion existing in the area of a square whose length L is a specific length on one side is along the longitudinal groove portion The measured length is shorter than the length measured along the lateral groove portion of the aforementioned lateral groove portion existing in the area. <13> The absorbent article according to any one of the above <10> to <12>, wherein the meandering degree of the longitudinal groove portion in the side area is smaller than that of the meandering groove portion in the center area degree. <14> The absorbent article according to the above <13>, wherein the length of the longitudinal groove portion measured along the longitudinal groove portion of the longitudinal groove portion existing in the area of the square in which the length L of a side is a specific length in the side region In the central region, the length of the longitudinal groove portion existing in the square region of the specific length measured along the longitudinal groove portion is short. <15> The absorbent article according to any one of the above <10> to <14>, wherein at least a part of the side region overlaps the elastic region. <16> The absorbent article according to any one of the above <10> to <15>, wherein sheets for forming three-dimensional wrinkles with elastic members are arranged on both sides of the absorbent article in the longitudinal direction by The elastic member shrinks, and the crotch portion in the worn state forms a three-dimensional fold that rises toward the wearer's skin side, and the three-dimensional fold-forming sheet is joined to the side region of the front sheet Fixed end. <17> The absorbent article according to any one of the above <10> to <16>, wherein on both sides of the non-elastic region in the width direction, there is a pair of waist-side elastic regions, the waist-side elastic The area partially overlaps the above-mentioned side area. <18> The absorbent article according to any one of the above <10> to <17>, wherein the height H3 of the convex portion in the side region is 0.5 mm or more, preferably 1.0 mm or more, and 5.0 mm Below, preferably 4.0 mm or less, and 0.5 mm or more and 5.0 mm or less, preferably 1.0 mm or more and 4.0 mm or less. <19> The absorbent article according to any one of the above <10> to <18>, wherein the convex portion is formed in a zigzag arrangement in the uneven region. <20> The absorbent article according to any one of the above <10> to <19>, wherein in the concave-convex area, a plurality of the convex portions are connected in series along the longitudinal direction X at a fixed interval along the longitudinal direction. A plurality of rows are formed in the width direction Y, and a plurality of the convex portions are connected in series along the width direction at a fixed interval in the width direction. A plurality of rows are formed in the longitudinal direction X. Among the protruding portions adjacent to each other in the longitudinal direction, there is formed a first joint portion having a length b in the longitudinal direction that is longer than a length a in the width direction Y, and the first joint portion is the length in the longitudinal direction b is 1.2 times or more, preferably 1.5 times or more, and 5.0 times or less, preferably 3.0 times or less, 1.2 times or more, 5.0 times or less, preferably 1.5 times or more 3.0 times or less. <21> The absorbent article according to the above <20>, wherein the convex portion is surrounded by the first bonding portion and the second bonding portion whose length in the longitudinal direction is shorter than the first bonding portion, the second bonding portion The length d of the longitudinal direction X is 20% or more and 85% or less, preferably 30% or more and 70% or less of the length b of the first joining portion in the longitudinal direction.

<22> The absorbent article according to the above <21>, wherein the second joining portion is that the length c in the width direction is preferably the length a in the width direction of the first joining portion, preferably 0.8 or more and 1.2 or less, more preferably It is 0.9 or more and 1.1 or less. <23> The absorbent article according to any one of the above <1> to <22>, wherein the height H1 of the convex portion is 0.6 mm or more, preferably 1.0 mm or more, and 5.0 mm or less, preferably 4.0 mm or less, and 0.6 mm or more and 5.0 mm or less, preferably 1.0 mm or more and 4.0 mm or less. <24> The absorbent article according to any one of the above <1> to <23>, wherein the absorbent core is cut at an angle of the corner of the back side portion. [Industry availability]

According to the absorbent article of the present invention, the leakage prevention of excrement in the back side portion is excellent.

1‧‧‧1st sheet

2‧‧‧2nd sheet

3‧‧‧Joint

4‧‧‧Convex

10‧‧‧composite sheet

12‧‧‧Front sheet

13‧‧‧Back sheet

14‧‧‧Absorber

14a‧‧‧absorbent core

14a1‧‧‧End

14b‧‧‧Package chips

14c‧‧‧Corner

14d‧‧‧Side edge

15‧‧‧Three-dimensional wrinkle forming sheet

15a‧‧‧Elastic members for three-dimensional pleats

16‧‧‧Leg elastic member

17‧‧‧ Velcro

18‧‧‧ Locking area

19a‧‧‧Elastic waist member

19b‧‧‧ Elastic member on waist side

21‧‧‧ sheet

21a‧‧‧Substrate sheet

22‧‧‧Elastic waist area

24‧‧‧ Elastic area on waist side

25‧‧‧Inelastic region

31‧‧‧The first joint

32‧‧‧The second joint

34‧‧‧ Joint

35‧‧‧Joint

35c‧‧‧Scope

36‧‧‧Annular recess

36a‧‧‧Vertical

36b‧‧‧Horizontal

41‧‧‧Central convex

43‧‧‧Convex part

51‧‧‧Long groove

55‧‧‧Transverse groove

56‧‧‧Transverse groove

100‧‧‧Disposable diapers

a‧‧‧Length

A‧‧‧Ventral

b‧‧‧Length

B‧‧‧back side

c‧‧‧Length

C‧‧‧Lower crotch

d‧‧‧Length

F1‧‧‧Central bump area

F2‧‧‧Side concave and convex area

H1‧‧‧ Height

H3‧‧‧ Height

J1‧‧‧longitudinal compound row

J2‧‧‧Composite row in width direction

L‧‧‧Length

L1‧‧‧Length

L2‧‧‧Length

L5‧‧‧Length

L7‧‧‧Length

L8‧‧‧Length

L9‧‧‧Length

LP‧‧‧Length

M‧‧‧Central area

P‧‧‧Bag

Pa‧‧‧Bag Reservation Department

Pb‧‧‧Closing Structure Department

R1‧‧‧Long convex row

R2‧‧‧ Row of convex parts in the width direction

S‧‧‧side area

W1‧‧‧Length

W5‧‧‧Length

X‧‧‧length direction

Y‧‧‧Width direction

Fig. 1 is a plan view showing the basic structure of a disposable diaper which is one embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1. Fig. 3 is a perspective view for explaining the back side portion of the diaper shown in Fig. 1. Fig. 4 is a plan view showing the front sheet (composite sheet) of the disposable diaper according to the first embodiment. FIG. 5 is an enlarged plan view showing an enlarged central area of the front sheet (composite sheet) shown in FIG. 4. 6 is an enlarged cross-sectional view of the cross-section along the thickness direction of the central region shown in FIG. 5, FIG. 6 (a) is a cross-sectional view taken along the line III-III of FIG. 5 and passing through the top of the convex portion, and FIG. 6 (b ) Is a cross-sectional view taken along line IV-IV of FIG. 5. 7 is a view showing the side area of the front sheet (composite sheet) shown in FIG. 4, FIG. 7 (a) is an enlarged plan view showing the side area enlarged, and FIG. 7 (b) is shown along FIG. (a) An enlarged cross-sectional view of the cross-section of the VV line. FIG. 8 (a) is a plan view of the center region M of the front sheet (composite sheet) shown in FIG. 4 cut at 20 mm square. 8 (b) is an explanatory diagram illustrating the length measured along the longitudinal groove and the length measured along the horizontal groove in the composite sheet shown in FIG. 8 (a). FIG. 8 (c) is an enlarged plan view showing a concave portion formed around the convex portion shown in FIG. 8 (a). Fig. 9 is a perspective view showing a bag portion formed in the back side portion of the disposable diaper shown in Fig. 1. 10 is an enlarged cross-sectional view showing a cross-section along the thickness direction of the periphery of the bag shown in FIG. 9. 11 is a plan view schematically showing the positional relationship between the elastic region, the non-elastic region, and the absorbent core of the present invention. FIG. 12 is a plan view showing vertical groove portions and horizontal groove portions in side regions S, S of the front sheet (composite sheet) shown in FIG. 4.

Claims (20)

An absorbent article comprising a front sheet having a concave-convex area, a back sheet, and an absorbent core disposed between the two sheets, and having a longitudinal direction corresponding to the front-rear direction of the wearer and positive to the longitudinal direction The width direction intersecting, and having a ventral portion disposed on the ventral side of the wearer, a back side portion disposed on the back side of the wearer, and a lower crotch located therebetween, in the width direction on the back side portion At least the central portion of the upper portion has an elastic region in which an elastic member extending in the width direction is disposed, and a non-elastic region in which the elastic member is not disposed between the elastic region in the longitudinal direction and the absorbent core, The front sheet has a concave-convex area at a portion overlapping with the non-elastic area, the concave-convex area is formed by a convex pattern protruding toward the wearer's skin side in a specific pattern, and has a plurality of convex areas in the longitudinal direction A continuous longitudinal groove portion and a lateral groove portion continuous in the width direction through a plurality of the convex portions, the longitudinal groove portion meanders more than the lateral groove portion. The absorbent article according to claim 1, wherein the length L5 measured along the longitudinal groove portion of the above-mentioned longitudinal groove portion existing in a square with a length L of a specific length on one side is greater than the transverse width existing in the area The length L7 of the groove portion measured along the horizontal groove portion is long. The absorbent article according to claim 2, wherein the length L5 measured along the longitudinal groove portion of the longitudinal groove portion existing in the area of the square with the length L of a certain length on the side is relative to the length of the longitudinal groove portion. The length L7 of the lateral groove portion measured along the lateral groove portion is 110% or more and 300% or less. The absorbent article according to claim 1, wherein the longitudinal groove portion and the lateral groove portion are continuous by a portion of each of the plurality of convex portions. The absorbent article according to claim 1, wherein the convex portion is longer in the width direction than in the longitudinal direction. The absorbent article according to claim 1, wherein the convex portion is a ratio (L1 / L2) of the length L1 in the width direction to the length L2 in the longitudinal direction is 1.1 or more and 6.0 or less. The absorbent article according to claim 1, wherein the portion where the non-elastic region overlaps with the uneven region is a ratio (W1 / LP) of the widthwise length W1 to the lengthwise length LP (W1 / LP) of 1 or more and 15 or less. The absorbent article according to claim 1, wherein the widthwise length W1 of the portion where the non-elastic region overlaps with the uneven region is substantially equal to or slightly longer than the widthwise length W5 of the absorbent core. The absorbent article according to claim 1, wherein the front sheet has a pair of side regions located on both sides of the center region in the width direction, the side regions each having the convexities formed in a different pattern from the center region Part, the vertical groove portion, and the horizontal groove portion, the degree of meandering of the horizontal groove portion in the side region is greater than or equal to the vertical groove portion. The absorbent article according to claim 9, wherein the length measured along the longitudinal groove portion of the longitudinal groove portion existing in the area of the square in which the length L of one side is a specific length in the side area is present in the The length of the above-mentioned transverse groove portion in the region measured along the transverse groove portion is less than or equal to. The absorbent article according to claim 9, wherein the length of the longitudinal groove portion measured along the longitudinal groove portion of the longitudinal groove portion existing in the area of a square whose length L is a specific length in the side area is greater than that of the The length of the lateral groove portion measured along the lateral groove portion in the region is short. The absorbent article according to claim 9, wherein the meandering degree of the longitudinal groove portion in the side area is smaller than the meandering degree of the longitudinal groove portion in the center area. The absorbent article according to claim 12, wherein the length of the longitudinal groove portion measured along the longitudinal groove portion in the area of the side of the square in which the length L of the side is a specific length in the side area is higher than that in the central area The length of the vertical groove portion existing in the area of the square of the specific length measured along the vertical groove portion is short. The absorbent article according to claim 9, wherein at least a part of the side region overlaps the elastic region. The absorbent article according to claim 9, wherein sheets for forming three-dimensional wrinkles having elastic members are arranged on both sides of the absorbent article in the longitudinal direction, and the elastic member shrinks while being worn. The lower part of the crotch is formed with a three-dimensional fold that rises toward the wearer's skin side, and a fixed end of the three-dimensional fold-forming sheet is joined to the side region of the front sheet. The absorbent article according to claim 9, wherein on both sides of the non-elastic region in the width direction, there is a pair of waist-side elastic regions, and the waist-side elastic regions partially overlap the side regions. The absorbent article according to claim 1, wherein the convex portion is formed in a zigzag arrangement in the concave-convex area. The absorbent article according to claim 1, wherein in the concave-convex area, a plurality of the convex portions are connected in series along the longitudinal direction at a fixed interval along the longitudinal direction. A plurality of rows in the longitudinal direction are formed in a row of the widthwise convex portions in which the convex portions are connected in series along the width direction at a fixed interval, and between the convex portions adjacent in the longitudinal direction in the longitudinal convex row , A first joint portion having a length b in the longitudinal direction that is longer than the length a in the width direction is formed, and the first joint portion is that the length b in the length direction is 1.2 times or more of the length a in the width direction 5.0 Times below. The absorbent article according to claim 18, wherein the convex portion is surrounded by the first joint portion and the second joint portion whose length in the longitudinal direction is shorter than the first joint portion, and the second joint portion is the longitudinal direction The length d is 20% or more and 85% or less of the length b of the first joining portion in the longitudinal direction. The absorbent article according to claim 19, wherein the second joint portion is that the length c in the width direction is 0.8 or more and 1.2 or less the length a in the width direction of the first joint portion.