WO2019082819A1

WO2019082819A1 - Absorbent article

Info

Publication number: WO2019082819A1
Application number: PCT/JP2018/039051
Authority: WO
Inventors: 美奈富田; 岳志鈴木; 綾子牧野
Original assignee: 花王株式会社
Priority date: 2017-10-25
Filing date: 2018-10-19
Publication date: 2019-05-02
Also published as: TW201929815A; RU2020116182A3; JP7075740B2; CN111182869B; JP2019076499A; CN111182869A; RU2020116182A

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 articles

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

Conventionally, for the purpose of suppressing the flow of excrement on the surface sheet or controlling the flow direction to a specific direction, the skin facing surface side of the surface sheet of an absorbent article such as a disposable diaper has a three-dimensional shape and Technology is known.
For example, the present applicant has previously joined the first sheet and the second sheet stacked together as a top sheet of the absorbent article at a plurality of junctions, and the first sheet is other than the junctions. It has been proposed to use a composite sheet which protrudes in the direction away from the second sheet at the site of to form a convex portion protruding toward the skin side of the wearer (Patent Document 1).

Moreover, in the underpants type disposable diaper, what arranged the elastic member extended in the width direction of a diaper between the waist opening and the leg opening is known.
For example, the applicant previously has a pair of left and right side stretchable regions between the waist opening and the leg opening in the ventral side and / or the back side, and between the pair of side stretchable regions. The absorbent article is proposed in which the absorber is not arranged at the waist opening side rather than the center position of the side elastic region (Patent Document 2).

JP, 2017-93732, A Japanese Patent Application Publication No. 2007-29479

The present invention comprises a top sheet having a concavo-convex area, a back sheet, and an absorbent core disposed between the two sheets, and has a longitudinal direction corresponding to the longitudinal direction of the wearer and a width direction orthogonal to the longitudinal direction. An absorbent article having a ventral side disposed on the ventral side of the wearer, a dorsal side disposed on the dorsal side of the wearer, and a crotch portion located therebetween. The absorbent article of the present invention has an elastic region in which an elastic member extending in the width direction is disposed at least at a central portion of the back side in the width direction, and the elastic region and the absorbability in the longitudinal direction It has an inelastic region in which the elastic member is not disposed between the core and the core. The surface sheet has a concavo-convex area at a portion overlapping the inelastic area. In the uneven region, convex portions protruding toward the skin side of the wearer are formed in a predetermined pattern, and a plurality of longitudinal grooves extending between the plurality of convex portions and continuing in the longitudinal direction; And a transverse groove continuous in the width direction passing between the projections. The longitudinal groove has a greater degree of meandering than the lateral groove.

FIG. 1 is a plan view showing the basic configuration of a disposable diaper as an embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is a perspective view for explaining the back side of the diaper shown in FIG. FIG. 4: is a top view which shows the surface sheet (composite sheet) of the disposable diaper of 1st Embodiment. FIG. 5 is an enlarged plan view showing a central region of the surface sheet (composite sheet) shown in FIG. 6 is an enlarged cross-sectional view showing a cross-section along the thickness direction of the central region shown in FIG. 5, and FIG. 6 (a) is a cross-sectional view along the line III-III in FIG. 6 (b) is a cross-sectional view taken along the line IV-IV in FIG. FIG. 7 is a view showing a side area of the surface sheet (composite sheet) shown in FIG. 4, FIG. 7 (a) is an enlarged plan view showing the side area in an enlarged manner, and FIG. FIG. 7 is an enlarged cross-sectional view showing a cross section taken along the line VV of FIG. 7 (a). Fig.8 (a) is a top view which shows what cut off the central area M of the surface sheet (composite sheet) shown in FIG. 4 in 20 mm around. FIG. 8B is an explanatory view for explaining the length measured along the longitudinal groove and the length measured along the lateral groove in the composite sheet shown in FIG. 8A. FIG.8 (c) is an enlarged plan view which shows the recessed part formed around the convex part shown to Fig.8 (a). FIG. 9 is a perspective view showing a pocket formed on the back side of the disposable diaper shown in FIG. FIG. 10 is an enlarged cross-sectional view showing a cross section taken along the thickness direction around the pocket shown in FIG. FIG. 11 is a plan view schematically showing the positional relationship between an elastic region, an inelastic region, and an absorbent core according to the present invention. FIG. 12 is a plan view showing the longitudinal grooves and the lateral grooves in the side regions S, S of the surface sheet (composite sheet) shown in FIG.

Detailed Description of the Invention

In absorbent articles such as disposable diapers, excrement such as fluid soft stool moves from the end of the absorbent core on the back side to the waist edge of the back side and is not absorbed by the absorbent core. Since leakage may occur, it is required to prevent such leakage of excrement. The absorbent articles of Patent Document 1 and Patent Document 2 have room for improvement in preventing leakage of excrement at the above-mentioned dorsal side.

The present invention relates to an absorbent article that can overcome the drawbacks of the prior art described above.

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 simply referred to as a diaper 100) which is an embodiment of the absorbent article of the present invention.
The diaper 100 comprises a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13, and an absorbent body 14 disposed between the two

sheets

12, 13 as shown in FIGS. The liquid impermeability of the back sheet 13 is a concept including liquid impermeability, and includes the case where the back sheet 13 does not pass the liquid at all, the case where the back sheet 13 is made of a water repellent sheet, and the like.

The diaper 100 has a longitudinal direction X corresponding to the longitudinal direction of the wearer, and a width direction Y orthogonal to the longitudinal direction X in a state where the diaper 100 is spread in a planar shape as shown in FIG. There is. Moreover, the diaper 100 has a ventral side A, which is disposed on the ventral side of the wearer when worn, a dorsal side B, which is disposed on the dorsal side of the wearer when worn, and a ventral side A and the back in the longitudinal direction X. It has in the crotch C located between the side B and it. In the diaper 100 of the present embodiment, the crotch portion C is narrowed inward in the width direction Y, and the length of the crotch portion C in the width direction Y is in each width direction Y of the belly side A and the back side B. Short to length. The diaper 100 is a spread-type disposable diaper, and fastening tapes 17 are provided on both side edges of the back side B, and a landing zone 18 for fastening the fastening tape 17 on the outer surface of the abdominal side A Is provided.

The absorbent 14 in the diaper 100 includes an absorbent core 14 a and a core wrap sheet 14 b that wraps the absorbent core 14 a. The absorbent core 14a can be composed of, for example, a piled body of liquid absorbent fibers such as pulp fibers, or a mixed piled body of liquid absorbent fibers and a water absorbent polymer. Examples of the absorbent fibers include cellulose-based hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers and cellulose acetate. In addition to the cellulose-based hydrophilic fibers, fibers obtained by hydrophilizing fibers made of synthetic resins such as polyolefin, polyester, and polyamide with a surfactant or the like can also be used. For example, a tissue paper or a water-permeable nonwoven fabric is used as the core wrap sheet 14b. The core wrap sheet 14 b may wrap the whole of the absorbent core 14 a by one sheet, or may combine two or more sheets to wrap the absorbent core 14 a. As the back surface 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.

On both sides of the longitudinal direction X of the diaper 100, a sheet 15 for forming a three-dimensional gather having a three-dimensional gather elastic member 15a is disposed, and the crotch C in the worn state is produced by the contraction of the three-dimensional gather elastic member 15a. The three-dimensional gather which stands up toward the wearer's skin side is formed. In addition, the leg elastic member 16 is disposed in a stretched state at a portion disposed around the leg in the crotch C, and the contraction thereof causes the crotch C in the worn state to fit around the leg of the wearer. Leg gathers are formed to improve

The diaper 100 has an elastic region 20 in which

elastic members

19a and 19b extending in the width direction Y are disposed at least at a central portion of the back side B in the width direction Y. The elastic region 20 is a region that expands and contracts in the width direction Y along the waist peripheral portion, and as shown in FIG. 3, the waist elastic region 22 disposed on the waist peripheral side and the waist portion in the longitudinal direction X The waist portion side elastic region 24 is disposed closer to the absorbent core 14 a than the elastic region 22. The waist elastic region 22 has a waist elastic member 19 a extending in the width direction Y over the entire elastic region 22. The waist portion side elastic region 24 has a waist portion side elastic member 19 b shorter than the length of the waist portion elastic member 19 a, and is disposed on both sides of the absorbent core 14 a in the width direction Y. Hereinafter, the waist portion elastic member 19a and the waist portion side elastic member 19b are collectively referred to as an elastic member 19.

The elastic region 20 expands and contracts in the width direction Y when the

elastic members

19 a and 19 b extending in the width direction Y are fixed in an extended state. In the present embodiment, the elastic region 20 is formed by folding a rectangular base sheet 21 a in two and stacking two sheets, and bonding and fixing a plurality of

elastic members

19 a and 19 b made of thread rubber or the like between two sheets in an extended state. It is formed by the sheet piece 21 (refer FIG. 1). The sheet piece 21 has a rectangular shape having a longitudinal direction of the sheet piece 21 and a width direction orthogonal thereto. The sheet piece 21 is provided so as to extend in one direction over the entire area in the longitudinal direction of the base sheet 21a, and only in the front area and the rear area in the longitudinal direction of the base sheet 21a. It includes two types with the second elastic member 19 b disposed so as to extend in one direction. In the elastic region 20, the first elastic member 19a is a waist elastic member, and the second elastic member 19b is a waist side elastic member 19b. The second elastic member 19 b is inelastic in the central region in the longitudinal direction of the base sheet 21 a. In the diaper 100 of the present embodiment, the sheet piece 21 is disposed between the absorber 14 and the back sheet 13, and the sheet piece 21 is joined to the top sheet 12 and the back sheet 13. The elastic region 20 may be formed by holding and fixing a plurality of elastic members in a stretched state by the top sheet 12 and the back sheet 13.

The diaper 100 has an inelastic 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 between the waist elastic region 22 and the end 14 a 1 on the back side B of the absorbent core 14 a in the longitudinal direction X. have. The inelastic region 25 is disposed between a pair of waistline side elastic regions 24 located on both sides in the width direction Y of the absorbent core 14a.

The surface sheet 12 has the uneven region F in a portion overlapping with the inelastic region 25. The surface sheet 12 in the disposable diaper 100 of this embodiment is comprised from the composite sheet 10 which has the uneven | corrugated area | region F shown in FIG. As shown in FIG. 4, the composite sheet 10 according to the present embodiment has a central area M located at the center in the width direction Y and a pair of side areas S, S located on both sides of the central area M. An uneven region F is provided on the entire composite sheet 10 including the central region M and the pair of side regions S. 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 also 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 "concave / convex area F". In the present embodiment, the inelastic region 25 overlaps the central uneven region F1.

As shown in FIG. 4, the uneven area F including the central uneven area F1 and the pair of side uneven areas F2 is an area in which a plurality of convex portions 4 made of a fiber sheet such as non-woven fabric are formed. Hereinafter, the convex part 4 in the central concavo-convex area F1 is also referred to as a central convex part 41 and the convex part 4 in the side concavo-convex area F2 as a side convex part 43. The center convex part 41 in the center concavo-convex area F1 is formed in a predetermined pattern as shown in FIG. The central concavo-convex area F1 has a longitudinal groove 51 continuous in the longitudinal direction X through a plurality of central convex portions 41, and a lateral groove 55 continuous in the width direction Y through a plurality of central convex portions 41. ing.

As shown in FIG. 8C, the central uneven region F1 in the present embodiment has an annular recess 36 surrounding each of the central protrusions 41 formed in a predetermined pattern. Further, in the central uneven region F1, a plurality of annular recesses 36 are continuous in the longitudinal direction X and the width direction Y. As shown in FIG. 8C, the annular concave portion 36 surrounding the individual convex portions includes a pair of vertical portions 36 a positioned on both sides in the width direction Y of the central convex portion 41 and the longitudinal direction X of the central convex portion 41. It has a pair of horizontal portions 36b located on both sides, and one end of the vertical portion 36a is coupled to the center of the horizontal portion 36b. The annular recesses 36 adjacent to each other in the width direction Y share the vertical portion 36 a between the central projections 41 adjacent to each other in the width direction Y. The annular recesses 36 adjacent to each other in the longitudinal direction X share a lateral portion 36 b between the central projections 41 adjacent to each other in the longitudinal direction X.

Fig.8 (a) is a top view which shows the center area | region M of the composite sheet 10 cut off to square by predetermined length.
As shown in FIG. 8A, the longitudinal groove 51 is formed by connecting a part of the plurality of annular recesses 36 adjacent in the longitudinal direction X to each other. Specifically, the longitudinal groove 51 is a half portion of one horizontal portion 36b, one vertical portion 36a coupled to the one horizontal portion, and the other horizontal portion 36b coupled to the one vertical portion. And the other longitudinal portion 36a coupled to the other lateral portion are continuous along the longitudinal direction X in this order.
As shown to Fig.8 (a), the horizontal groove part 55 is formed by one part of several annular recessed parts 36 adjacent to the width direction Y continuing. Specifically, in the annular groove 36 adjacent to the width direction Y, the lateral groove portions 55 adjacent to each other in the width direction Y are connected with each other and the lateral groove portions 55 are continuous in the width direction Y. Thus, the longitudinal groove 51 and the lateral groove 55 are continuous through a part of the periphery of each of the plurality of central protrusions 41.

The longitudinal groove 51 and the lateral groove 55 meander as shown in FIG. 8A. The longitudinal groove 51 has a greater degree of meandering in the width direction Y than the lateral groove 55. The magnitude of the degree of meandering can be determined, for example, by the following measurement.
The length of each

groove

51, 55 in which the length L of one side is in a square area of a predetermined length is measured along the longitudinal groove 51 for the longitudinal groove 51, and the lateral groove 55 for the lateral groove 55. (See FIG. 8 (b)). The measured lengths are taken as the meandering length L5 of the longitudinal groove 51 and the meandering length L7 of the lateral groove 55. The larger the ratio of the meandering length of the

grooves

51 and 55 to the side length L, the larger the degree of the meandering, and the smaller the smaller the degree of the meandering. The length L of one side is equal to or greater than either the distance between the projections 4 adjacent in the longitudinal direction X and the distance between the projections 4 adjacent in the width direction Y, and is preferably 20 mm. When a square area having a side length L of 20 mm can not be set on the uneven area, a square area having a side length L as close to 20 mm as possible is set. It is also preferable that the setting of the square area and the measurement of the meandering lengths L5 and L7 of the

grooves

51 and 55 be performed by image processing on an image of the concavo-convex area captured by a digital camera or the like.
The meandering length L5 of the longitudinal groove 51 in the present embodiment is longer than the meandering length L7 of the lateral groove 55.

The diaper 100 has an elastic region 20 and an inelastic region 25 on the back side B, and has a central uneven region F1 in a portion where the surface sheet 12 overlaps the inelastic region 25. The longitudinal groove 51 has a greater degree of meandering than the lateral groove 55. By having such a configuration, as shown in FIGS. 9 and 10, the diaper 100 can form the pocket portion P in the portion where the inelastic region 25 and the uneven region F overlap. More specifically, the inelastic region 25 is disposed between the elastic region 20 (waist elastic region 22) and the absorbent core 14a, compared to the portion where the absorbent core 14a is disposed. Low rigidity and easy to bend in the width direction Y. On the other hand, the surface sheet 12 has a greater degree of meandering in the grooved portion 51 in the concavo-convex area F compared to the horizontal groove portion 55, and the length measured along the groove is also longer. Also, since the bending rigidity along the width direction Y is lower, it is easier to bend in the width direction Y. In the diaper 100, the non-elastic region 25 having the above configuration and the uneven region F overlap, and the diaper 100 bends in the width direction Y at the overlapping portion, as shown in FIG. A pocket portion P recessed on the opposite surface side is formed. The pocket portion P captures excrement that has moved to the waist side of the waist than the end of the absorbent core 14a on the dorsal side B side, so that leakage of excrement at the dorsal side B is effective. Can be suppressed. Hereinafter, such an effect is also referred to as a leakage preventing effect.

The meandering length L5 of the longitudinal groove 51 is preferably 110% or more, more preferably 120% or more, with respect to the meandering length L7 of the horizontal groove 55, from the viewpoint of achieving the above-described leakage prevention effect more reliably. Also preferably, it is 300% or less, more preferably 200% or less, and preferably 110% or more and 300% or less, more preferably 120% or more and 200% or less.
When the length L of one side described above is 20 mm, the meandering length L5 of the longitudinal groove 51 is preferably 25 mm or more, more preferably 30 mm or more, and preferably 80 mm or less, more preferably 60 mm or less. Moreover, Preferably they are 25 mm or more and 80 mm or less, More preferably, they are 30 mm or more and 60 mm or less.

From the viewpoint of increasing the degree of meandering of the longitudinal groove 51, the central protrusion 41 preferably has a length L1 in the width direction Y longer than a length L2 in the longitudinal direction X. The central convex portion 41 preferably has a ratio (L1 / L2) of the length L1 in the width direction Y (see FIG. 6A) to the length L2 in the longitudinal direction X (see FIG. 6B) is preferably 1. 1 or more, more preferably 1.5 or more, preferably 6.0 or less, more preferably 4.0 or less, and preferably 1.1 or more, 6.0 or less, more preferably 1.5 or more It is less than 4.0. 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, preferably 30 mm or less, more preferably 15 mm or less, and preferably 3 mm to 30 mm or less Preferably they are 5 mm or more and 15 mm or less.

As described above, the pocket portion P is formed in the portion where the inelastic region 25 and the uneven region F overlap. Hereinafter, a portion Pa (see FIG. 11) where the inelastic region 25 and the uneven region F overlap is also referred to as a pocket planned portion Pa. From the viewpoint that the formation of the pocket portion P is easily performed, the planned pocket portion Pa has a ratio (W1 / LP) of the length W1 of the width direction Y (see FIG. 11) to the length LP of the longitudinal direction X (see FIG. 11). Is preferably 1 or more, more preferably 2 or more, preferably 15 or less, more preferably 10 or less, and preferably 1 or more and 15 or less, more preferably 2 or more and 10 or less. The length LP in the longitudinal direction X of the planned pocket Pa is preferably 10 mm or more, more preferably 15 mm or more, preferably 80 mm or less, more preferably 60 mm or less, and preferably 10 mm to 80 mm or less Preferably they are 15 mm or more and 60 mm or less. The length W1 of the width direction Y of the pocket planned part Pa is approximately equal to or slightly shorter than the length W5 of the absorbent core 14a in the same direction Y. The length W5 (see FIG. 11) of the absorbent core 14a in the width direction Y is the maximum length of the absorbent core 14a in the width direction Y at the back side B.

In the concavo-convex region F of the present embodiment, the stacked first sheet 1 and second sheet 2 are joined to each other at the plurality of joining portions 3 and the first sheet 1 is at a portion other than the joining portion 3 A central convex portion 41 is formed so as to protrude in the direction away from the second sheet 2.
Further, in the present embodiment, as shown in FIG. 6, in the composite sheet 10 constituting the uneven area F of the surface sheet 12, the surface on the side of the second sheet 2 is substantially flat, and on the side of the first sheet 1. The annular concave portion 36 between the convex portion 4 and the convex portion 4 forms a large uneven portion.

The surface sheet 12 has a convex portion row R1 in which convex portions are arranged along the longitudinal direction X in the central concavo-convex area F1, as shown in FIGS. 4 and 5, and the central convex portion in the convex portion row R1. It is preferable to partially have

portions

31 and 32 consolidated by embossing between 41 and 41.
In the present embodiment, the first bonding portion 31 in which the first sheet 1 and the second sheet 2 are fused by heat embossing as the

portions

31 and 32 consolidated by embossing is similarly heated. It has the 2nd junction part 32 by which between the 1st sheet 1 and the 2nd sheet 2 was fusion-bonded by embossing. The above-described annular recess 36 is formed by a first bonding portion 31 having a long shape in the longitudinal direction X, and a second bonding portion 32 intermittently formed in the width direction Y.

As shown in FIGS. 7A and 7B, the pair of side regions S and S of the composite sheet 10 in the present embodiment is the second sheet 2 in a portion other than the bonding portion 3 in the first sheet 1. Side convex parts 43 whose length in the width direction Y is shorter than that of the central convex part 41 of the central area M have side concavo-convex areas F2 formed in a staggered arrangement as the convex parts 4 formed to project in the direction away from ing. In the side concavo-convex area F2, a joint portion pair 34 consisting of a pair of

joint portions

35, 35 arranged close to each other with a space and a side convex portion 43 are alternately arranged at constant intervals in the width direction Y The widthwise composite row J2 and the side convex portions 43 and the joint portion 34 are formed such that a plurality of longitudinal direction composite rows J1 alternately arranged at fixed intervals in the longitudinal direction X are respectively formed. There is. Thus, the side regions S, S have the side convex portions 43 formed in a pattern different from that of the central region M.

As shown in FIG. 12, the side uneven regions F2 of the side regions S and S pass between the plurality of side convex portions 43 and pass through between the plurality of side convex portions 43 and the longitudinal groove portion 52 continuous in the longitudinal direction X. And a lateral groove portion 56 continuous in the width direction Y. As described above, the side regions S, S have the side convex portions 43 formed in a pattern different from that of the central region M. The longitudinal grooves 52 and the lateral grooves 56 in the regions S, S are also different from the central region M. It is formed of a pattern. Further, the lateral groove portions 56 in the side regions S, S meander as much as the longitudinal groove portions 52 of the side regions S, S, or meander as compared to the longitudinal groove portions 52 (see FIG. 12). According to such a configuration, the side regions S, S can be easily bent in the longitudinal direction X, and a pair of blocking structures Pb, Pb rising on the skin side are formed on both sides of the pocket P in the width direction Y to prevent leakage. The effect can be further improved (see FIG. 9). The degree of meandering of the longitudinal grooves 52 and the lateral grooves 56 in the side regions S and S can be determined by the following method. As in the meandering length L5 of the longitudinal groove 51 and the meandering length L7 of the lateral groove 55 in the central concavo-convex area F1, the length L of each side is within a square area of a predetermined length. Measure the length. The measured lengths are taken as the meandering length of the longitudinal groove 52 and the meandering length of the lateral groove 56. In the side regions S and S, the meandering length of the longitudinal groove 52 is preferably equal to or less than the meandering length of the lateral groove 56, and more preferably shorter than the meandering length of the lateral groove 56.

From the viewpoint of increasing the degree of meandering of the horizontal groove 56 more than the vertical groove 52 in the side regions S and S, the length in the longitudinal direction X of the range 35 c in which the bonding portion 35 is provided between adjacent side convex portions 43 It is preferable that the length L9 in the width direction Y is longer than L8 [see FIG. 7 (a)]. For example, in the side regions S and S in the present embodiment, one joint portion 35 is provided between the side convex portions 43 adjacent in the longitudinal direction X, and two joint portions are provided between the side convex portions 43 adjacent in the width direction Y 35 (joint portions 34) are respectively formed, and between adjacent side convex portions 43, joint portions 35 are provided in a longer range in the width direction Y than the longitudinal direction X. The length L8 in the longitudinal direction X of the range 35c in which the bonding portion 35 is provided is the length in the longitudinal direction X of the range 35c in which the bonding portion 35 exists between adjacent side convex portions 43 in the longitudinal direction X The length L9 in the width direction Y of the range 35c in which the portion 35 is provided is the length in the width direction Y of the range 35c in which the joint portion 35 exists between the side convex portions 43 adjacent in the width direction Y.

The degree of meandering of the longitudinal groove portion 52 in the side regions S and S is preferably smaller than the degree of meandering of the longitudinal groove portion 51 in the central region M, from the viewpoint of easily forming the blocking structure portions Pb and Pb described above. The degree of meandering of each

groove

51, 52 can be determined by measuring the length of each

groove

51, 52 in a square area of a predetermined length L, as described above. After the square area is set to each of the side areas S and S and the central area M, the meandering length of the

grooves

51 and 52 is obtained.

The diaper 100 has a pair of waistline side elastic regions 24 on both sides of the inelastic region 25 in the width direction Y. The waist portion side elastic region 24 partially overlaps the side regions S and S of the composite sheet 10. That is, the waist portion side elastic member 19 b partially overlaps the side regions S and S of the composite sheet 10. According to such a configuration, the above-described damming structure portion Pb can be easily formed, and the leakage preventing effect can be further improved. Thus, 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 aforementioned solid gathers in the diaper 100 are formed by the solid gather elastic members 15a that contract in the longitudinal direction X so as to stand up toward the skin side of the wearer, and the solid gathers in the side regions S and S of the surface sheet 12 The fixed ends of the forming sheet 15 are joined. In the diaper 100, the side regions S and S are easily bent in the longitudinal direction X by joining the sheet 15 for forming the three-dimensional gather, and the elastic member 15a for a three-dimensional gather further shrinks in the longitudinal direction X It is easy to bend in X, and the above-mentioned pocket P can be easily formed in the back side B. Further, as shown in FIG. 9, since the solid gathers are formed on both side edge sides of the pocket portion P in the width direction Y, the leakage prevention effect can be further enhanced.

The diaper 100 has the inelastic area 25 at least at the central part of the back side B in the width direction Y, and the inelastic area 25 overlaps with the central uneven area F1 of the composite sheet 10 used as the surface sheet 12 ing. Moreover, as for the diaper 100, the surface sheet 12 is distribute | arranged so that the center part of the absorber 14 and the center area | region M in the width direction Y may overlap. The central convex portions 41 of the central concavo-convex area F1 are arranged in a zigzag as shown in FIG. With such a configuration, irregular creases are formed in the pocket portion P because the side portions of the central concavo-convex area F1 are easily bent in the diagonal direction toward the end side of the back side portion B with respect to the width direction Y. Is effectively suppressed to improve the formability of the pocket portion P. As described above, it is preferable that the projections 4 be formed in a staggered arrangement in the uneven region F.

In the back side B, the absorbent core 14 a of the present embodiment has a pair of corner portions 14 c on both sides in the width direction Y. As shown in FIG. 11, the corner 14 c of the back side B is formed such that its outline is inclined inward from the outside in the width direction Y. According to such a configuration, the damming structure portion Pb extends to the boundary between the corner portion 14 c and the side edge 14 d of the absorbent core 14 a in the longitudinal direction X, so that the leakage preventing effect can be improved. Thus, in the absorbent core 14a, it is preferable that the corner portion 14c of the back side B be cut obliquely.

As the first sheet 1 of the composite sheet 10 in the present embodiment, for example, a non-woven fabric, a woven fabric, a knitted fabric or the like is used as the fiber sheet for forming the convex portion 4 and is preferably a non-woven fabric. As the second sheet 2 partially joined to the first sheet 1 to form the composite sheet 10, sheet materials made of various materials such as non-woven fabric, woven fabric, fibrous sheet such as woven fabric and film, etc. can be 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 a mesh or the like.

When a non-woven fabric is used as the sheet material constituting the first sheet 1 or the second sheet 2, examples of the non-woven fabric include air through non-woven fabric, spunbonded non-woven fabric, spunlace non-woven fabric, meltblown non-woven fabric, resin bonded non-woven fabric, needle punched non-woven fabric, etc. It can be mentioned. It is also possible to use a laminate in which two or more of these nonwoven fabrics are combined, or a laminate in which these nonwoven fabrics are combined with a film or the like. Among these, it is preferable to use an air through nonwoven fabric or a spunbond nonwoven fabric. The basis weight of the non-woven 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 non-woven 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 a fiber which comprises a nonwoven fabric, the fiber which consists of 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 and nylon 66, polyacrylic acid, polymethacrylic acid alkyl ester, polyvinyl chloride, polyvinylidene chloride and the like. These resins can be used alone 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.

Further explaining the central concavo-convex area F1 of the top sheet 12 in the present embodiment, as shown in FIG. 5, in the concavo-convex area F1, as the central convex part 41, the central convex part 41 having a horizontally long shape in plan view It is formed in a dispersed state in the X and width directions Y. More specifically, as shown in FIG. 4, the central convex portions 41 are arranged in a zigzag shape, and a longitudinal convex portion row in which a plurality of central convex portions 41 are arranged in series along the longitudinal direction X at regular intervals. A plurality of rows of R1 are formed in the width direction Y, and the positions of the central protrusions 41 of the longitudinal protrusion row R1 adjacent to each other in the width direction Y are shifted by a half pitch in the longitudinal direction X. Further, central convex portions 41 of the longitudinal direction convex portion row R1 adjacent in the width direction Y overlap so that the portions thereof are alternately arranged in the longitudinal direction X.
In the central concavo-convex area F1, a plurality of width direction convex portion rows R2 in which a plurality of central convex portions 41 are connected in series along the width direction Y at regular intervals are formed in a plurality of rows in the longitudinal direction X.

Between the central convex portions 41 adjacent in the longitudinal direction X in the longitudinal direction convex portion row R 1, as shown in FIG. 5, the first longitudinal first having a length b in the longitudinal direction X longer than a length a in the width direction Y A joint 31 is formed. The first bonding portion 31 is located between the central convex portions 41 adjacent in the width direction Y in the width direction convex portion row R2. The first joint portion 31 between the central convex portions 41 adjacent in the width direction Y is the first joint portion 31 located between the central convex portions 41 in the longitudinal direction convex portion row R1 adjacent in the width direction. In the longitudinally-long first bonding portion 31, the length b in the longitudinal direction X is preferably 1.2 times or more, more preferably 1.5 times or more the length a in the width direction Y, and preferably 5. It is 0 times or less, more preferably 3.0 times or less, 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.

Each central convex portion 41 is surrounded by the first bonding portion 31 and a second bonding portion 32 whose length in the longitudinal direction is shorter than that of the first bonding portion 31. Each central convex portion 41 is surrounded by four or more joints 3 to form a concave portion surrounding each central convex portion 41. Further, concave portions surrounding the plurality of central convex portions 41 are continuously formed, and continuous concave portions continuous in a mesh shape are formed in portions other than the central convex portion 41 in the concave and convex area F.
When the joined portion between the first sheet 1 and the second sheet 2 is collectively referred to as a joined portion 3, the number of joined portions 3 surrounding the individual central convex portions 41 is preferably 4 or more, more preferably 8 or more. And preferably 20 or less, more preferably 16 or less. It is preferable that these junctions 3 be provided as a pair sandwiching the central protrusion 41 from both sides in the longitudinal direction X or a pair sandwiching the central protrusion 41 from both sides in the width direction Y.

The second bonding portion 32 has a length d in the longitudinal direction X of preferably 20% to 85%, and more preferably 30% to 70% of the length b of the first bonding portion 31 in the longitudinal direction. . The length c of the second bonding portion 32 in the width direction Y is preferably 0.8 or more and 1.2 or less of the length a of the first bonding portion 31 in the width direction Y, and more preferably 0. 9 or more and 1.1 or less.

Between the central convex portions 41 and between the side convex portions 43, the first sheet (sheet material) forming the central convex portion 41 or the side convex portions 43 has a partially densified portion. When the center convex part 41 or the side convex part 43 is formed from the composite sheet 10 which has the junction part 3 of the 1st sheet 1 and the 2nd sheet 2 like this embodiment, that junction part However, it is preferable that the part be partially pressed and consolidated by embossing or the like.

From the viewpoint of ensuring that the effect of making the central concavo-convex region F1 easy to bend in the width direction Y is more reliably exhibited and the effect of complementing excrement with the concave portions between the central convex portions 41 is more reliably exhibited, The height H1 (see FIG. 6 (a)) of the portion 41 is preferably 0.6 mm or more, more preferably 1.0 mm or more, and preferably 5.0 mm or less, more preferably 4.0 mm or less It is also preferably 0.6 mm or more and 5.0 mm or less, more preferably 1.0 mm or more and 4.0 mm or less.
The height H3 (see FIG. 7B) of the side convex portion 43 is preferably 0 from the viewpoint of ensuring that the effect of making the side concavo-convex regions F2 and F2 easy to bend in the longitudinal direction X is more reliably exhibited. .5 mm or more, more preferably 1.0 mm or more, preferably 5.0 mm or less, more preferably 4.0 mm or less, and preferably 0.5 mm or more and 5.0 mm or less, more preferably 1.0 mm It is 4.0 mm or less.

When the concavo-convex region F 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 convex portion 4 is the first sheet from the lower surface of the second sheet 2. It is defined as the distance to the top surface of 1 [see FIGS. 6 and 7 (b)]. The height is 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.
When the concavo-convex region F is formed of a single-layer sheet material, the height of the convex portions is a straight line connecting the tops of the convex portions adjacent in the longitudinal direction X, and the position between the convex portions in the sheet material The height difference with the lower surface of the portion farthest from the straight line is taken as the height of the convex portion.

In order to produce the composite sheet 10 having the above-described configuration, the belt-like first sheet 1 is formed such that the peripheral surfaces thereof mesh with one another in the same manner as in the method described in JP-A-2015-112343 or Patent Document 1. After the first sheet 1 was deformed into a concavo-convex shape by being supplied between the first roll and the second roll, the first sheet 1 was moved from the meshing portion along the circumferential surface of the first roll After that, the second sheet 2 is supplied so as to be superposed on the first sheet 1, and both

sheets

1 and 2 are partially joined by sandwiching under heat between the convex portion of the first roll and the heat roll. . And in that case, the uneven | corrugated shape of a 1st roll and a 2nd roll and the pattern of the junction part formed with a 1st roll and a heat roll are made to differ by the center part and side part of a 1st sheet. When the first sheet 1 is deformed into a concavo-convex shape by being engaged with the meshing portion between the first roll and the second roll, the first sheet is sucked toward the inside of the roll to form the first sheet 1. It is preferable to promote the deformation of the metal into the concavo-convex shape.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to each embodiment mentioned above, It can change suitably.
For example, the composite sheet 10 used for the surface sheet 12 may not have the side regions S and S in which the convex portions are formed in a pattern different from the central region M, and the central region M and the entire region A composite sheet 10 having a similar configuration may be used as the top sheet 12.
Further, in the embodiment described above, as shown in FIG. 4, the concavo-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 In the above, the uneven region F having the convex portion 4 may be formed only on the back side B, for example, only on the back side B and crotch C, or only on the back side B and belly side A It may be formed.

Further, the shapes of the bonding portion 3 surrounding the convex portion 4 and other bonding portions, and the arrangement thereof can be determined as appropriate. The shape of each joint may be any shape such as a circle, an ellipse, an oval, a triangle, a quadrangle, a pentagon, a star, a heart, etc., in addition to a rectangle and a square.
Further, the absorbent article of the present invention may be a pant-type (pull-on type) disposable diaper in place of the unfolded disposable diaper, and may be a pant-type or ordinary non-pant type sanitary napkin It may be an incontinence pad, a panty liner or the like.

Regarding the above-mentioned embodiment, the present invention further discloses the following absorbent article.
<1>
A wearer is provided with a front sheet having a concavo-convex area, a back sheet, and an absorbent core disposed between the two sheets, and has a longitudinal direction corresponding to the longitudinal direction of the wearer and a width direction orthogonal to the longitudinal direction An absorbent article having a ventral side disposed on the ventral side, a dorsal side disposed on the dorsal side of the wearer, and a crotch portion located therebetween.
The elastic member has an elastic region in which an elastic member extending in the width direction is disposed at least at a central portion in the width direction of the back side, and the elastic member is disposed between the elastic region in the longitudinal direction and the absorbent core. Have an inelastic area where no
The surface sheet has a concavo-convex area at a portion overlapping the inelastic area,
In the uneven region, convex portions protruding toward the skin side of the wearer are formed in a predetermined pattern, and a plurality of longitudinal grooves extending between the plurality of convex portions and continuing in the longitudinal direction; And a lateral groove continuous in the width direction passing between the convex portions,
The absorbent article, wherein the longitudinal groove has a greater degree of meandering than the lateral groove.

<2>
The length L5 of one side L measured in the longitudinal groove of the longitudinal groove exists in a square area of a predetermined length along the lateral groove of the lateral groove existing in the area The absorbent article according to <1>, which is longer than the measured length L7.
<3>
The length L5 of the longitudinal groove portion measured along the longitudinal groove portion of the longitudinal groove portion existing in a square region of a predetermined length is along the lateral groove portion of the lateral groove portion existing in the region. 110% or more, preferably 120% or more, 300% or less, preferably 200% or less, and 110% or more and 300% or less, preferably 120% or more, of the length L7 measured. The absorbent article as described in said <2> which is the following.
<4>
The length L5 measured along the longitudinal groove portion of the longitudinal groove, which exists in a square area of 20 mm on a side, is 25 mm or more, preferably 30 mm or more, and 80 mm or less, preferably 60 mm or less, The absorbent article as described in said <2> or <3> which is 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 <1> to <4>, wherein the longitudinal groove portion and the lateral groove portion are continuous through a part of the periphery of each of the plurality of convex portions.
<6>
The absorbent article according to any one of <1> to <5>, wherein the convex portion has a length in the width direction longer than a length in the longitudinal direction.
<7>
A ratio (L1 / L2) of the length L1 of the width direction Y to the length L2 of the longitudinal direction X of the convex portion is 1.1 or more, preferably 1.5 or more, and 6.0 or less , The absorbent according to any one of the above <1> to <6>, which is preferably 4.0 or less, and is 1.1 or more and 6.0 or less, preferably 1.5 or more and 4.0 or less. Goods.
<8>
The ratio Pa of the length W1 in the width direction to the length LP in the longitudinal direction (W1 / LP) is 1 or more, preferably 2 or more, in the part Pa where the inelastic area and the uneven area overlap. The absorbent article according to any one of <1> to <7>, which is 15 or less, preferably 10 or less, and 1 or more and 15 or less, preferably 2 or more and 10 or less.
<9>
The length W1 in the width direction of the portion Pa where the inelastic area and the uneven area overlap is approximately equal to or slightly longer than the length W5 in the same direction of the absorbent core. The absorbent article according to any one of the above <1> to <8>.
<10>
The surface sheet has a pair of side areas positioned on both sides of the central area in the width direction, and the side areas are the convex portions formed in a pattern different from the central area, the longitudinal groove, and Each has a horizontal groove,
The absorbent article according to any one of <1> to <9>, wherein the lateral groove portion in the side region has a meandering degree equal to or higher than that of the longitudinal groove portion.

<11>
In the side area, a length L of one side is in a square area of a predetermined length, a length measured along the longitudinal groove of the longitudinal groove is in the area, and the lateral groove of the lateral groove is The absorbent article as described in said <10> which is below the length measured along the part.
<12>
In the side area, a length L of one side is in a square area of a predetermined length, a length measured along the longitudinal groove of the longitudinal groove is in the area, and the lateral groove of the lateral groove is The absorbent article as described in said <10> or <11> short compared with the length measured along the part.
<13>
The absorbent article according to any one of <10> to <12>, wherein the degree of meandering of the longitudinal groove in the side region is smaller than the degree of meandering of the longitudinal groove in the central region.
<14>
In the side area, a length L of one side is within a square area of a predetermined length, and a length measured along the longitudinal groove of the longitudinal groove is a square of the predetermined length in the central area The absorbent article according to <13>, which is shorter than the length measured along the longitudinal groove portion of the longitudinal groove portion existing in the region of.
<15>
The absorbent article according to any one of <10> to <14>, wherein at least a part of the side region overlaps the elastic region.
<16>
A sheet for forming a solid gather having an elastic member is disposed on both sides in the longitudinal direction of the absorbent article, and contraction of the elastic member causes the crotch in the worn state to the wearer's skin side The absorption according to any one of <10> to <15>, wherein a solid gather that rises up is formed, and the fixed end of the sheet for forming the solid gather is joined to the side area of the surface sheet. Sex goods.
<17>
The <10> to <16>, having a pair of waist portion side elastic regions on both sides of the inelastic region in the width direction, wherein the waist portion side elastic regions partially overlap the side regions. The absorbent article according to any one of the above.
<18>
The height H3 of the protrusion in the side area is 0.5 mm or more, preferably 1.0 mm or more, and 5.0 mm or less, preferably 4.0 mm or less, and 0.5 mm or more and 5.0 mm The absorbent article according to any one of the above <10> to <17>, which is preferably 1.0 mm or more and 4.0 mm or less.
<19>
The absorbent article according to any one of <1> to <18>, wherein the convex portions are formed in a staggered arrangement in the uneven region.
<20>
In the uneven region, a plurality of longitudinal convex portion rows in which a plurality of the convex portions are connected in series along the longitudinal direction X at regular intervals are formed in a plurality of rows in the width direction Y, and a plurality of the convex portions are constant A plurality of width direction convex portion rows arranged in series along the width direction at intervals are formed in the longitudinal direction X,
Between the convex portions adjacent in the longitudinal direction in the longitudinal convex portion row, a longitudinally long first joint portion in which the length b in the longitudinal direction is longer than the length a in the width direction Y is formed,
In the first joint portion, the length b in the longitudinal direction is 1.2 times or more, preferably 1.5 times or more, preferably 5.0 times or less, preferably 3 times the length a in the width direction. The absorption according to any one of <1> to <19>, which is not more than 0, and not less than 1.2 and not more than 5.0 times, preferably not less than 1.5 times and not more than 3.0 times Sex goods.
<21>
The convex portion is surrounded by the first joint portion and a second joint portion whose length in the longitudinal direction is shorter than the first joint portion, and the second joint portion is in the longitudinal direction X. The absorbent article according to <20>, wherein the length d of the first bonding portion is 20% or more and 85% or less, preferably 30% or more and 70% or less of the length b of the longitudinal direction.

<22>
In the second bonding portion, the length c in the width direction is preferably 0.8 or more and 1.2 or less, more preferably 0.9 or more, of the length a in the width direction of the first bonding portion. The absorbent article as described in said <21> which is 1.1 or less.
<23>
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 The absorbent article according to any one of the above <1> to <22>, which is 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>, in which the corner of the back side of the absorbent core is cut obliquely.

ADVANTAGE OF THE INVENTION According to the absorbent article of this invention, it is excellent in the leak prevention property of the excretion in a back side.

Claims

A wearer is provided with a front sheet having a concavo-convex area, a back sheet, and an absorbent core disposed between the two sheets, and has a longitudinal direction corresponding to the longitudinal direction of the wearer and a width direction orthogonal to the longitudinal direction An absorbent article having a ventral side disposed on the ventral side, a dorsal side disposed on the dorsal side of the wearer, and a crotch portion located therebetween.
The elastic member has an elastic region in which an elastic member extending in the width direction is disposed at least at a central portion in the width direction of the back side, and the elastic member is disposed between the elastic region in the longitudinal direction and the absorbent core. Have an inelastic area where no
The surface sheet has a concavo-convex area at a portion overlapping the inelastic area,
In the uneven region, convex portions protruding toward the skin side of the wearer are formed in a predetermined pattern, and a plurality of longitudinal grooves extending between the plurality of convex portions and continuing in the longitudinal direction; And a lateral groove continuous in the width direction passing between the convex portions,
The absorbent article, wherein the longitudinal groove has a greater degree of meandering than the lateral groove.
The length L5 of one side L measured in the longitudinal groove of the longitudinal groove exists in a square area of a predetermined length along the lateral groove of the lateral groove existing in the area The absorbent article according to claim 1, which is longer than the measured length L7.
The length L5 of the longitudinal groove portion measured along the longitudinal groove portion of the longitudinal groove portion existing in a square region of a predetermined length is along the lateral groove portion of the lateral groove portion existing in the region. The absorbent article according to claim 2, which is 110% or more and 300% or less with respect to the length L7 measured.
The absorbent article according to claim 2 or 3, wherein a length L5 measured along the longitudinal groove portion of the longitudinal groove portion, which exists in a square area of 20 mm on a side, is 25 mm or more and 80 mm or less.
The absorbent article according to any one of claims 1 to 4, wherein the longitudinal groove portion and the lateral groove portion are continuous through a part of the periphery of each of the plurality of convex portions.
The absorbent article according to any one of claims 1 to 5, wherein the convex portion has a length in the width direction longer than a length in the longitudinal direction.
The ratio (L1 / L2) of the length L1 of the width direction to the length L2 of the longitudinal direction of the convex portion is 1.1 or more and 6.0 or less. The absorbent article as described in.
The ratio of the length W1 in the width direction to the length LP in the longitudinal direction (W1 / LP) is 1 or more and 15 or less in a portion where the inelastic area and the uneven area overlap. The absorbent article according to any one of 7.
The widthwise length W1 of the overlapping portion of the inelastic region and the uneven region is approximately equal to or slightly longer than the length W5 in the same direction of the absorbent core. Item 9. The absorbent article according to any one of Items 1 to 8.
The surface sheet has a pair of side areas positioned on both sides of the central area in the width direction, and the side areas are the convex portions formed in a pattern different from the central area, the longitudinal groove, and Each has a horizontal groove,
The absorbent article according to any one of claims 1 to 9, wherein the lateral groove portion in the side region has a meandering degree equal to or higher than that of the longitudinal groove portion.
In the side area, a length L of one side is in a square area of a predetermined length, a length measured along the longitudinal groove of the longitudinal groove is in the area, and the lateral groove of the lateral groove is The absorbent article according to claim 10, which is equal to or less than the length measured along the part.
In the side area, a length L of one side is in a square area of a predetermined length, a length measured along the longitudinal groove of the longitudinal groove is in the area, and the lateral groove of the lateral groove is The absorbent article according to claim 10 or 11, which is shorter than the length measured along the part.
The absorbent article according to any one of claims 10 to 12, wherein a degree of meandering of the longitudinal groove in the side region is smaller than a degree of meandering of the longitudinal groove in the central region.
In the side area, a length L of one side is within a square area of a predetermined length, and a length measured along the longitudinal groove of the longitudinal groove is a square of the predetermined length in the central area The absorbent article according to claim 13, wherein the absorbent article is shorter than the length measured along the longitudinal groove of the longitudinal groove existing in the area of.
The absorbent article according to any one of claims 10 to 14, wherein the side region at least partially overlaps the elastic region.
A sheet for forming a solid gather having an elastic member is disposed on both sides in the longitudinal direction of the absorbent article, and contraction of the elastic member causes the crotch in the worn state to the wearer's skin side The absorbent article according to any one of claims 10 to 15, wherein a solid gather which rises up is formed, and a fixed end of the sheet for forming the solid gather is joined to the side area of the surface sheet. .
The pair of waist portion side elastic regions are provided on both sides of the inelastic region in the width direction, and the waist portion side elastic regions partially overlap the side regions. The absorbent article according to item 1.
The absorbent article according to any one of claims 10 to 17, wherein the height H3 of the convex portion in the side region is 0.5 mm or more and 5.0 mm or less.
The absorbent article according to any one of claims 1 to 18, wherein the protrusions are formed in a staggered arrangement in the uneven region.
In the uneven region, a plurality of longitudinal convex portion rows in which a plurality of the convex portions are connected in series along the longitudinal direction at a constant interval are formed in a plurality of rows in the width direction, and a plurality of convex portions are at a constant interval And a plurality of width direction convex portion rows arranged in series along the width direction are formed in the longitudinal direction,
Between the convex portions adjacent in the longitudinal direction in the longitudinal convex portion row, a longitudinally long first joint portion in which the length b in the longitudinal direction is longer than the length a in the width direction is formed,
The first joint portion according to any one of claims 1 to 19, wherein the length b in the longitudinal direction is not less than 1.2 times and not more than 5.0 times the length a in the width direction. Absorbent article.
The convex portion is surrounded by the first bonding portion and a second bonding portion whose length in the longitudinal direction is shorter than the first bonding portion, and the second bonding portion is formed in the longitudinal direction. The absorbent article according to claim 20, wherein the length d is 20% or more and 85% or less of the length b in the longitudinal direction of the first bonding portion.
22. The absorbent according to claim 21, wherein the second bonding portion has a length c in the width direction of 0.8 or more and 1.2 or less of a length a in the width direction of the first bonding portion. Goods.
The absorbent article according to any one of claims 1 to 22, wherein the height H1 of the convex portion is 0.6 mm or more and 5.0 mm or less.
The absorbent article according to any one of claims 1 to 23, wherein in the absorbent core, corners of the back side are cut obliquely.