阅读说明：本技术 吸收性物品 (Absorbent article ) 是由 牧野绫子 富田美奈 铃木岳志 于 2018-12-06 设计创作，主要内容包括：本发明的吸收性物品包括正面片(12),且具有长度方向(X)和与该长度方向正交的宽度方向(Y)。正面片(12)中,中央区域(M)和侧部区域(S、S)分别具有格子状凹部(30)和凸部(4),上述格子状凹部(30)包括：以一定间隔配置的在一个方向上连续地延伸的多条第1连续凹部(31)；和以一定间隔配置的在与上述一个方向交叉的方向上连续地延伸的多条第2连续凹部(35),上述凸部(4)被该第1连续凹部(31)和该第2连续凹部(35)包围。第1和第2连续凹部(31、35)分别相对于长度方向(X)和宽度方向(Y)不平行,与侧部区域(S、S)相比,中央区域(M)的第1和第2连续凹部(31、35)的宽度较大。(The absorbent article of the present invention includes a front sheet (12), and has a longitudinal direction (X) and a width direction (Y) orthogonal to the longitudinal direction. In the front surface sheet (12), a central region (M) and a side region (S, S) have lattice-shaped recesses (30) and protrusions (4), respectively, and the lattice-shaped recesses (30) include: a plurality of 1 st continuous recessed portions (31) arranged at regular intervals and continuously extending in one direction; and a plurality of 2 nd continuous recessed portions (35) arranged at regular intervals and continuously extending in a direction intersecting the one direction, wherein the convex portion (4) is surrounded by the 1 st continuous recessed portion (31) and the 2 nd continuous recessed portion (35). The 1 st and 2 nd continuous recessed portions (31, 35) are not parallel to the longitudinal direction (X) and the width direction (Y), respectively, and the width of the 1 st and 2 nd continuous recessed portions (31, 35) in the central region (M) is larger than that of the side regions (S, S).)

1. An absorbent article including a front sheet, a back sheet, and an absorber disposed between the front sheet and the back sheet, and having a longitudinal direction corresponding to a front-back direction of a wearer and a width direction orthogonal to the longitudinal direction, the absorbent article characterized in that:

the front surface sheet has a central region located at a central portion in the width direction and a pair of side regions located on both sides of the central region,

the central region and the side regions have lattice-shaped recesses and projections, respectively, and the lattice-shaped recesses include: a plurality of 1 st continuous recesses arranged at regular intervals and continuously extending in one direction; and a plurality of 2 nd continuous recessed portions arranged at regular intervals and extending continuously in a direction intersecting the one direction, the convex portion being surrounded by the 1 st continuous recessed portion and the 2 nd continuous recessed portion, the 1 st continuous recessed portion and the 2 nd continuous recessed portion being non-parallel with respect to the longitudinal direction and the width direction, respectively,

the width of the 1 st and 2 nd continuous recesses of the central region is larger than that of the side regions.

2. The absorbent article of claim 1, wherein:

a width W1 of the 1 st continuous recess in the central region is 120% or more and 250% or less with respect to a width W6 of the 1 st continuous recess in the side regions.

3. The absorbent article of claim 1 or 2, wherein:

a width W1 of the 1 st continuous recess in the central region is 80% or more and 120% or less with respect to a width W3 of the 2 nd continuous recess in the central region.

4. The absorbent article according to any one of claims 1 to 3, wherein:

the width W1 of the 1 st continuous recessed portion in the central region is 0.5mm or more and 5mm or less.

5. The absorbent article according to any one of claims 1 to 4, wherein:

a width W6 of the 1 st continuous recess in the side region is 80% or more and 120% or less with respect to a width W8 of the 2 nd continuous recess in the side region.

6. The absorbent article according to any one of claims 1 to 5, wherein:

the inclination angles of the 1 st and 2 nd continuous recesses in the central region with respect to the width direction are respectively larger than the inclination angles of the 1 st and 2 nd continuous recesses in the side regions with respect to the width direction.

7. The absorbent article according to any one of claims 1 to 6, wherein:

the difference between the inclination angle θ 1 of the 1 st continuous recessed portion with respect to the width direction in the central region and the inclination angle θ 6 of the 1 st continuous recessed portion with respect to the width direction in the side region is 10 ° or more and 45 ° or less.

8. The absorbent article according to any one of claims 1 to 7, wherein:

the difference between the inclination angle θ 1 of the 1 st continuous recessed portion in the central region with respect to the width direction and the inclination angle θ 3 of the 2 nd continuous recessed portion in the central region with respect to the width direction is 0 ° or more and 10 ° or less.

9. The absorbent article according to any one of claims 1 to 8, wherein:

an inclination angle θ 1 of the 1 st continuous recessed portion in the central region with respect to a width direction is 45 ° or more and 80 ° or less.

10. The absorbent article according to any one of claims 1 to 9, wherein:

the difference between the inclination angle θ 6 of the 1 st continuous recessed portion with respect to the width direction in the side region and the inclination angle θ 8 of the 2 nd continuous recessed portion with respect to the width direction in the side region is 0 ° or more and 10 ° or less.

11. The absorbent article according to any one of claims 1 to 10, wherein:

the 1 st consecutive recesses in the central region are spaced apart from each other more widely and the 2 nd consecutive recesses are spaced apart from each other more widely than the side regions.

12. The absorbent article according to any one of claims 1 to 11, wherein:

an interval L1 between the 1 st continuous recesses in the central region is 110% or more and 250% or less with respect to an interval L6 between the 1 st continuous recesses in the side regions.

13. The absorbent article according to any one of claims 1 to 12, wherein:

an interval L1 between the 1 st continuous recesses in the central region is 80% or more and 120% or less with respect to an interval L3 between the 2 nd continuous recesses in the central region.

14. The absorbent article according to any one of claims 1 to 13, wherein:

the interval L1 between the 1 st continuous recesses in the central region is 2mm to 10 mm.

15. The absorbent article according to any one of claims 1 to 14, wherein:

an interval L6 between the 1 st continuous recesses in the side region is 80% or more and 120% or less with respect to an interval L8 between the 2 nd continuous recesses in the side region.

16. The absorbent article according to any one of claims 1 to 15, wherein:

the central region has a compressed portion at an intersection of the 1 st continuous recess and the 2 nd continuous recess.

17. The absorbent article according to any one of claims 1 to 16, wherein:

the central region has a compressed portion at an intersection of the 1 st continuous recess and the 2 nd continuous recess, and a length of the compressed portion in the width direction is longer than a length of the compressed portion in the longitudinal direction.

18. The absorbent article of claim 16 or 17, wherein:

the seal portion includes a plurality of small seal portions and a spacer portion.

19. The absorbent article according to any one of claims 16 to 18, wherein:

the length a of the compression section in the width direction is 120% to 500% of the length b in the longitudinal direction.

20. The absorbent article according to any one of claims 17 to 19, wherein:

the length a of the compression section in the width direction is 105% to 150% inclusive of the width W1 of the 1 st continuous recessed portion in the central region.

21. The absorbent article according to any one of claims 1 to 20, wherein:

the central region and the side regions each have a compressed portion at an intersection of the 1 st continuous recessed portion and the 2 nd continuous recessed portion,

the length of the compressed portion in the width direction in the central region is longer than that in the side regions.

22. The absorbent article according to any one of claims 16 to 21, wherein:

the length a in the width direction of the densified portion in the central region is 120% to 500% inclusive with respect to the length a1 in the width direction of the densified portion in the side regions.

23. The absorbent article according to any one of claims 16 to 22, wherein:

the central region has a 2 nd compression part at a position other than the intersection part,

the length of the width direction of the compression part of the intersection part is longer than that of the 2 nd compression part.

24. The absorbent article of claim 23, wherein:

in the central region, a plurality of rows of 1 st inclined compacting section rows R1 in which the compacting sections and the 2 nd compacting sections are alternately arranged at regular intervals in the 1 st continuous concave section are formed along the direction in which the 1 st continuous concave section extends, and a plurality of rows of 2 nd inclined compacting section rows R2 in which the compacting sections and the 2 nd compacting sections are alternately arranged at regular intervals in the 2 nd continuous concave section are formed along the direction in which the 2 nd continuous concave section extends.

25. The absorbent article of claim 24, wherein:

the 1 st inclined packing row and the 2 nd inclined packing row intersect with each other so as to share the packing at the intersection.

26. The absorbent article according to any one of claims 23 to 25, wherein:

the width-directional length a of the seal portion is 120% to 500% with respect to the width-directional length a5 of the 2 nd seal portion.

27. The absorbent article according to any one of claims 1 to 26, wherein:

in each of the central region and the side regions, the convex portions are arranged in a scattered manner between the lattice-shaped concave portions.

28. The absorbent article according to any one of claims 1 to 27, wherein:

the height H1 of the convex part in the central area is more than 0.5mm and less than 5.0 mm.

29. The absorbent article according to any one of claims 1 to 28, wherein:

the height H3 of the convex part formed in the side part area is more than 0.3mm and less than 4.0 mm.

Technical Field

The present invention relates to an absorbent article such as a disposable diaper, a menstrual sanitary napkin, and an incontinence pad.

Background

Disclosure of Invention

The invention provides an absorbent article which comprises a front sheet, a back sheet and an absorber arranged between the front sheet and the back sheet, and has a longitudinal direction corresponding to the front-back direction of a wearer and a width direction orthogonal to the longitudinal direction. The front surface sheet has a central region located at a central portion in the width direction and a pair of side regions located on both sides of the central region. The central region and the side regions have lattice-shaped recesses and projections, respectively, and the lattice-shaped recesses include: a plurality of 1 st continuous recesses arranged at regular intervals and continuously extending in one direction; and a plurality of 2 nd continuous recessed portions arranged at regular intervals and continuously extending in a direction intersecting the one direction, wherein the convex portion is surrounded by the 1 st continuous recessed portion and the 2 nd continuous recessed portion, and the 1 st continuous recessed portion and the 2 nd continuous recessed portion are not parallel to the longitudinal direction and the width direction, respectively. The width of the 1 st and 2 nd continuous recesses of the central region is larger than that of the side regions.

Drawings

Fig. 1 is a plan view showing a basic structure of a disposable diaper as an embodiment of the absorbent article of the present invention.

FIG. 2 is a sectional view II-II of FIG. 1.

Fig. 3 is a plan view showing a composite sheet preferably used as the topsheet of the present invention.

Fig. 4 is an explanatory diagram of a method of measuring the width of the linear non-contact portion.

Fig. 5 is an enlarged plan view (a) showing a central region M and an enlarged plan view (b) showing a side region S of the composite sheet shown in fig. 3.

Fig. 6 is an enlarged sectional view showing a cross section of the front sheet (composite sheet) shown in fig. 5 in the thickness direction, and is a sectional view taken along line III-III (a) shown in fig. 5(a) and a sectional view taken along line V-V (b) shown in fig. 5 (b).

Fig. 7 is an explanatory view of a main part of another embodiment of the present invention.

Detailed Description

According to patent document 1, since the composite sheet stably maintains the air-permeable passage between the continuous protrusions, the absorbent article using the composite sheet is excellent in air permeability and moisture barrier properties. Further, according to patent document 2, even when the front sheet is bent while the convex portions of the composite sheet are worn, the low convex portions are preferentially crushed and the high convex portions at the center are less likely to be crushed, so that the breathability and the like of the convex portions can be satisfactorily maintained.

However, the continuous convex portions described in patent document 1 and the convex portions described in patent document 2 may be difficult to maintain breathability in the diaper when the continuous convex portions are pressed against the skin of the wearer during wearing of the diaper. In addition, although the composite sheet having a plurality of projections formed thereon facilitates diffusion of the excretory fluid between the projections, the excretory fluid may excessively diffuse and cause side leakage.

The present invention addresses the problem of providing an absorbent article that can eliminate the disadvantages of the prior art described above.

Hereinafter, the present invention will be described based on preferred embodiments thereof with reference to the accompanying drawings.

Fig. 1 and 2 show a basic structure of a disposable diaper 100 (hereinafter, also simply referred to as a diaper 100) as an embodiment of the absorbent article of the present invention.

As shown in fig. 1 and fig. 2, the diaper 100 includes a liquid-permeable front sheet 12, a liquid-impermeable back sheet 13, and an absorbent body 14 disposed between the two sheets 12, 13. The liquid impermeability of the back sheet 13 also includes the concept of liquid impermeability, and includes a case where the back sheet 13 is composed of a water repellent sheet or the like, in addition to a case where the back sheet 13 does not transmit liquid at all.

The diaper 100 has a longitudinal direction X corresponding to the front-back direction of the wearer, and a width direction Y orthogonal to the longitudinal direction X in a state where the diaper 100 is laid out flat as shown in fig. 1. The diaper 100 also has, in the longitudinal direction X, a front side portion a disposed on the front side of the wearer when worn, a back side portion B disposed on the back side of the wearer when worn, and a crotch portion C located between the front side portion a and the back side portion B. The diaper 100 is an open-type disposable diaper, and includes fastening tapes 17 provided on both side edges of a back side portion B, and fastening regions 18 for fixing the fastening tapes 17 on an outer surface of a front side portion a.

The absorbent body 14 in the diaper 100 includes an absorbent core 14a and a core-spun sheet 14b which wraps the absorbent core 14 a. The absorbent core 14a can include, for example, a fiber-laminated body of liquid-absorbent fibers such as pulp fibers, or a mixed fiber-laminated body of liquid-absorbent fibers and water-absorbent polymers. Examples of the liquid-absorbent 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 obtained by hydrophilizing fibers made of synthetic resins such as polyolefin, polyester, and polyamide with a surfactant or the like can be used. As the core-spun sheet 14b, for example, tissue paper or water-permeable nonwoven fabric is used. The core sheet 14b may cover the entire absorbent core 14a by 1 sheet, or may cover the absorbent core 14a by combining 2 or more sheets. As the back sheet 13, a liquid impermeable or water repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like is used.

The diaper 100 has three-dimensional gathers forming sheets 15 each having an elastic member 15a disposed on both sides in the longitudinal direction X, and the elastic members 15a contract to form three-dimensional gathers standing up toward the skin of the wearer in the crotch portion C in the worn state. In addition, leg elastic members 16 are disposed in an extended state at the portions of the crotch portion C disposed around the legs, and contraction thereof forms leg gathers that improve the fit around the legs of the wearer in the crotch portion C in the worn state.

The topsheet 12 in the disposable diaper 100 according to embodiment 1 is composed of the composite sheet 10 shown in fig. 3.

As shown in fig. 3, the composite sheet 10 has a central region M in which irregularities including a plurality of concave portions 3 and convex portions 4 are formed in different patterns, and a pair of side regions S, S located on both sides of the central region M. The central region M is located at the central portion of the diaper 100 in the width direction Y, and the pair of side regions S, S are formed on both outer sides in the width direction Y with the central region M therebetween. The pair of side regions S, S are formed on both side portions of the composite sheet 10 in the longitudinal direction X of the diaper 100. The side regions S are formed at positions that are bilaterally symmetric with respect to a longitudinal center line CL extending in the longitudinal direction X of the diaper 100, and the irregularities are formed in the same pattern in each side region S.

In the present specification, the concave portion 3 and the convex portion 4 can be identified by the following method.

< method for identifying concave and convex parts >

A50 mm X50 mm measurement piece was cut out from the front sheet, and the non-skin-facing surface of the measurement piece was attached to a flat acrylic plate. The measurement piece with the acrylic plate attached thereto is placed on a general stamp pad (for example, UNISTAMP (trade name), red color, manufactured by mitsubishi pencil corporation) used for stamping a rubber stamp or the like with the skin-facing side down. Subsequently, the measurement sheet was pressed from above the acrylic resin plate at 1.2kPa, and ink was applied to the skin-facing surface of the measurement sheet. The skin-facing surface of the measurement sheet to which the ink is attached is also referred to as an ink surface. Next, the measurement piece was placed on a white paper with the ink face down, and the ink was transferred to the white paper with pressurization of 1.2kPa from above the acrylic resin plate. The portion (contact portion) where the ink is transferred to the blank sheet is a convex portion 4, and the portion (non-contact portion) where the ink is not transferred is a concave portion 3. The following 1 st and 2 nd continuous recessed portions are linear non-contact portions (linear non-contact portions) having a width of 0.3mm or more and continuously extending in one direction.

A method for measuring the width W of the linear noncontact portion will be described below with reference to fig. 4. In fig. 4, linear non-contact portions are denoted by reference numerals S1 and S3, and contact portions are denoted by reference numeral S5.

First, intersection points P1 and P1 of the linear non-contact portion S1 to be measured and 2 other linear non-contact portions S3 and S3 intersecting the linear non-contact portion S1 and adjacent to each other are set. The intersections P1 and P1 are intersections of the center line of the linear non-contact portion S1 and the center lines of the other linear non-contact portions S3 and S3, and are usually located at the center of the intersection of the linear non-contact portions S1 and S3. Next, a perpendicular line L passing through a midpoint P3 between the intersection points P1 and P1 and perpendicularly intersecting the linear non-contact portion S1 of the measurement target is set, and the distance W between both side edges I, I of the linear non-contact portion S1 on the perpendicular line L is measured at the 5-point midpoint P3 of the linear non-contact portion S1 of the measurement target. Then, the average of the measured values is defined as the width W of the linear non-contact portion S1. The measurement of the width W of the linear non-contact portion is performed on the white paper to which the ink is transferred.

Fig. 5(a) is an enlarged plan view showing a part of the central region M of the composite sheet 10 in a further enlarged manner, and fig. 5(b) is an enlarged plan view showing a part of the side regions S of the composite sheet 10 in a further enlarged manner.

As shown in fig. 5(a) and (b), the central region M and the side region S, S have lattice-shaped recesses 30a, 30b as the recesses 3, respectively, and the lattice-shaped recesses 30a, 30b include: a plurality of 1 st continuous concave portions 31a, 31b arranged at regular intervals and continuously extending in one direction; and a plurality of 2 nd continuous concave portions 35a, 35b arranged at a constant interval and continuously extending in a direction intersecting the one direction. Hereinafter, the 1 st continuous recessed portions 31a and 31b in the central region M and the side regions S, S are collectively referred to as "1 st continuous recessed portion 31", and the 2 nd continuous recessed portions 35a and 35b in the both regions M, S, S are collectively referred to as "2 nd continuous recessed portion 35". In addition, the 1 st and 2 nd continuous recessed portions 31a and 35a in the central region M are also referred to as a1 st central continuous recessed portion 31a and a 2 nd central continuous recessed portion 35a, respectively, and the 1 st and 2 nd continuous recessed portions 31b and 35b in the side region S, S are also referred to as a1 st side continuous recessed portion 31b and a 2 nd side continuous recessed portion 35b, respectively.

The 1 st continuous recessed portion 31 and the 2 nd continuous recessed portion 35 are not parallel to the longitudinal direction X and the width direction Y, respectively. That is, the 1 st continuous recessed portion 31 and the 2 nd continuous recessed portion 35 are linear recessed portions 3 extending in directions intersecting the longitudinal direction X and the width direction Y, respectively, and these recessed portions 31 and 35 are formed continuously in a lattice shape in each of the central region M and the side regions S, S.

Further, the central region M and the side regions S, S have convex portions 4a, 4b surrounded by the 1 st continuous concave portion 31 and the 2 nd continuous concave portion 35, respectively. In each of the central region M and the side regions S, S, the convex portions 4a and 4b are arranged in a scattered manner between the lattice-shaped concave portions 30a and 30b [ see fig. 5(a) and (b) ].

The width of the 1 st and 2 nd continuous recesses 31, 35 is larger in the central region M than in the side regions S, S. For example, the width of the 1 st central continuous recessed portion 31a is larger than the width of one or both of the 1 st side continuous recessed portion 31b and the 2 nd side continuous recessed portion 35 b. The width of the 2 nd center continuous recessed portion 35a is larger than the width of one or both of the 1 st side continuous recessed portion 31b and the 2 nd side continuous recessed portion 35 b. The width of each of the continuous recessed portions 31 and 35 can be determined by the above-described method for measuring the width W of the linear non-contact portion.

In the diaper 100, the topsheet 12 has the lattice-like recesses 30 formed of the 1 st and 2 nd continuous recesses 31 and 35 and the projections 4 surrounded by the 1 st and 2 nd continuous recesses 31 and 35 in the central region M and the side regions S, S, and therefore, moisture in the diaper 100 can be easily released to the outside of the diaper 100 along the 1 st and 2 nd continuous recesses 31 and 35, and good air permeability can be obtained, and also, a discharged liquid such as urine excreted into the diaper 100 can be made to flow along the lattice-like recesses 30, and good diffusion can be obtained. However, in the side region S, S, if the excretory fluid excessively diffuses along the 1 st and 2 nd continuous recessed portions 31b and 35b, side leakage may occur.

In the diaper 100 of the present embodiment, the width of the 1 st and 2 nd continuous concave portions 31 and 35 is larger in the central region M of the top sheet 12 than in the side regions S, S. That is, the width of the conduction path for the drain in the side region S, S is narrower than the width of the conduction path in the central region M. As a result, excellent air permeability and diffusion are exhibited in the central region M in which side leakage is less likely to occur, and excessive diffusion of excreta liquid is effectively suppressed in the side regions S, S, so that the diaper 100 as a whole can have excellent air permeability and can achieve both prevention of side leakage and diffusion of excreta liquid.

From the viewpoint of further improving air permeability and diffusibility, the width W1 of the 1 st central continuous recessed portion 31a (see fig. 5 (a)) is preferably 120% or more, more preferably 130% or more, further preferably 250% or less, more preferably 180% or less, further preferably 120% or more and 250% or less, more preferably 130% or more and 180% or less, with respect to the width W6 of the 1 st side continuous recessed portion 31b (see fig. 5 (b)).

From the same viewpoint as described above, the width W1[ see fig. 5(a) ] of the 1 st central continuous concave portion 31a is preferably 0.5mm or more, more preferably 1mm or more, and further preferably 5mm or less, more preferably 3mm or less, and further preferably 0.5mm or more and 5mm or less, and more preferably 1mm or more and 3mm or less.

From the viewpoint of keeping the air permeability of the central region M uniform, the width W1[ see fig. 5(a) ] of the 1 st central continuous recessed portion 31a is preferably 80% or more, more preferably 90% or more, further preferably 120% or less, more preferably 110% or less, further preferably 80% or more and 120% or less, more preferably 90% or more and 110% or less, and further preferably 100% with respect to the width W3[ see fig. 5(a) ] of the 2 nd central continuous recessed portion 35 a.

From the viewpoint of keeping the air permeability in the side region S, S uniform, the width W6[ see fig. 5(b) ] of the 1 st side continuous recessed portion 31b is preferably 80% or more, more preferably 90% or more, further preferably 120% or less, more preferably 110% or less, further preferably 80% or more and 120% or less, more preferably 90% or more and 110% or less, and further preferably 100% with respect to the width W8[ see fig. 5(b) ] of the 2 nd side continuous recessed portion 35 b.

In the central region M and the side regions S, S, as described above, the 1 st and 2 nd continuous concave portions 31, 35 are not parallel with respect to the longitudinal direction X and the width direction Y, respectively. From the viewpoint of enhancing the air permeability and the diffusibility of the central region M described above and enhancing the conformability of the side regions S, S to the skin of the wearer, the inclination angles θ 1, θ 3 of the 1 st and 2 nd continuous recessed portions 31a, 35a in the central region M with respect to the width direction Y are preferably larger than the inclination angles θ 6, θ 8 of the 1 st and 2 nd continuous recessed portions 31b, 35b in the side regions S, S with respect to the width direction Y, respectively. For example, the inclination angle θ 1 of the 1 st central continuous recessed portion 31a with respect to the width direction Y is preferably larger than one or both of the inclination angle θ 6 of the 1 st side continuous recessed portion 31b with respect to the width direction Y and the inclination angle θ 8 of the 2 nd side continuous recessed portion 35b with respect to the width direction Y. Further, the inclination angle θ 3 of the 2 nd central continuous recessed portion 35a with respect to the width direction Y is preferably larger than one or both of the inclination angle θ 6 of the 1 st side continuous recessed portion 31b with respect to the width direction Y and the inclination angle θ 8 of the 2 nd side continuous recessed portion 35b with respect to the width direction Y.

From the viewpoint of enhancing the air permeability and diffusibility of the central region M and the conformability of the side regions S, S, the difference between the inclination angle θ 1 of the 1 st central continuous concave portion 31a with respect to the width direction Y [ see fig. 5(a) ] and the inclination angle θ 6 of the 1 st side continuous concave portion 31b with respect to the width direction Y [ see fig. 5(b) ] is preferably 10 ° or more, more preferably 20 ° or more, further preferably 45 ° or less, more preferably 35 ° or less, further preferably 10 ° or more and 45 ° or less, more preferably 20 ° or more and 35 ° or less.

From the viewpoint of enhancing the air permeability and the diffusibility of the central region M, the inclination angle θ 1[ see fig. 5(a) ] of the 1 st central continuous concave portion 31a with respect to the width direction Y is preferably 45 ° or more, more preferably 50 ° or more, and further preferably 80 ° or less, more preferably 70 ° or less, and further preferably 45 ° or more and 80 ° or less, more preferably 50 ° or more and 70 ° or less.

From the viewpoint of more uniformly diffusing moisture in the diaper 100, the difference between the inclination angle θ 1 of the 1 st central continuous concave portion 31a with respect to the width direction Y [ see fig. 5(a) ] and the inclination angle θ 3 of the 2 nd central continuous concave portion 35a with respect to the width direction Y [ see fig. 5(a) ] is preferably 10 ° or less, more preferably 5 ° or less, and further preferably the two inclination angles θ 1 and θ 3 are equal to each other.

From the viewpoint of providing the same conformability to the both side regions S, S, the difference between the inclination angle θ 6 of the 1 st side continuous recessed portion 31b with respect to the width direction Y and the inclination angle θ 8 of the 2 nd side continuous recessed portion 35b with respect to the width direction Y is preferably 10 ° or less, more preferably 5 ° or less, and further preferably the two inclination angles θ 6, θ 8 are equal to each other.

In the present embodiment, the projections 4 are arranged in a scattered manner on the front sheet 12, but in the portion where the projections 4 are densely arranged, the sheet is soft and good conformability can be obtained. In order to improve the fit of the side regions S, S disposed around the legs of the wearer, the interval between the 1 st continuous recessed portions 31 and the interval between the 2 nd continuous recessed portions 35 in the central region M are preferably larger than those in the side regions S, S. That is, the interval L1 between the 1 st center continuous recessed portions 31a (see fig. 5 (a)) is preferably larger than the interval L6 between the 1 st side continuous recessed portions 31b (see fig. 5 (b)). Further, the interval L3 between the 2 nd center continuous concave portions 35a (see fig. 5 a) is preferably larger than the interval L8 between the 2 nd side continuous concave portions 35b (see fig. 5 b).

The interval between the 1 st continuous recessed portions 31 is the minimum length between 2 mutually parallel continuous recessed portions adjacent to each other with the protruding portion 4 interposed therebetween, and is the shortest distance between the side edge of one continuous recessed portion and the side edge of the other continuous recessed portion adjacent to the one side edge, measured in the orthogonal direction orthogonal to the direction in which the 2 continuous recessed portions extend.

From the viewpoint of more reliably exhibiting air permeability and diffusibility in the central region M and improving the conformability of the side regions S, S, the interval L1 between the 1 st central continuous recessed portions 31a (see fig. 5 (a)) is preferably 110% or more, more preferably 130% or more, and further preferably 250% or less, more preferably 200% or less, and further preferably 110% or more and 250% or less, and more preferably 130% or more and 200% or less, with respect to the interval L6 between the 1 st side continuous recessed portions 31b (see fig. 5 (b)).

From the viewpoint of more reliably exhibiting air permeability and diffusibility in the central region M, the interval L1 between the 1 st central continuous concave portions 31a [ see fig. 5(a) ] is preferably 2mm or more, more preferably 4mm or more, and further preferably 10mm or less, more preferably 8mm or less, and further preferably 2mm or more and 10mm or less, and more preferably 4mm or more and 8mm or less.

From the same viewpoint as described above, the interval L1 between the 1 st central continuous recessed portions 31a [ see fig. 5(a) ] is preferably 80% or more, more preferably 90% or more, and further preferably 120% or less, more preferably 110% or less, and further preferably 80% or more and 120% or less, more preferably 90% or more and 110% or less, and further preferably 100% with respect to the interval L3 between the 2 nd central continuous recessed portions 35a [ see fig. 5(a) ].

From the viewpoint of improving the conformability of the side region S, S, the interval L6[ see fig. 5(b) ] between the 1 st side continuous recessed portions 31b is preferably 80% or more, more preferably 90% or more, further preferably 120% or less, more preferably 110% or less, further preferably 80% or more and 120% or less, more preferably 90% or more and 110% or less, and further preferably 100% relative to the interval L8[ see fig. 5(b) ] between the 2 nd side continuous recessed portions 35 b.

The composite sheet 10 used as the topsheet 12 in the present embodiment has a double-layer structure in which the 1 st sheet 1 and the 2 nd sheet 2 are partially joined, and the 1 st sheet 1 has projections 4a and 4b projecting in a direction away from the 2 nd sheet 2 at portions other than the recesses 3 and projecting toward the skin of the wearer. In the composite sheet 10, the surface on the 2 nd sheet 2 side is substantially flat in both the central region M and the side region S, and irregularities are formed on the 1 st sheet 1 side.

The 1 st and 2 nd sheets 1 and 2 are made of a sheet material. As the sheet material, for example, a nonwoven fabric, a fiber sheet such as a woven fabric or a knitted fabric, a film or the like can be used, and from the viewpoint of the touch of the skin or the like, a fiber sheet is preferably used, and a nonwoven fabric is particularly preferably used. The types of sheet materials constituting the 1 st and 2 nd sheets 1 and 2 may be the same or different.

Examples of the nonwoven fabric when the nonwoven fabric is used as the sheet material constituting the 1 st and 2 nd sheets 1 and 2 include a through-air nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, a meltblown nonwoven fabric, a resin-bonded nonwoven fabric, and a needle-punched nonwoven fabric. A laminate in which 2 or more kinds of these nonwoven fabrics are combined, or a laminate in which these nonwoven fabrics and a film or the like are combined can also be used. Among them, a through-air nonwoven fabric or a spunbond nonwoven fabric is preferably used. The grammage of the nonwoven fabric used as the sheet material constituting the 1 st and 2 nd sheets 1 and 2 is preferably 10g/m²Above, more preferably 15g/m²The above is preferably 40g/m²Hereinafter, more preferably 35g/m²The following. The grammage of the nonwoven fabric is preferably 10g/m²Above and 40g/m²Hereinafter, more preferably 15g/m²Above and 35g/m²The following.

As the fibers constituting the nonwoven fabric, various fibers containing a thermoplastic resin 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, polyalkyl methacrylate, polyvinyl chloride, and polyvinylidene chloride. These resins can be used alone in 1 kind or as a mixture of 2 or more kinds. The fiber can be used in the form of a core-sheath type, a side-by-side type, or other composite fiber.

The 1 st continuous recessed portion 31 and the 2 nd continuous recessed portion 35 formed in the central region M and the side regions S, S are formed by a plurality of compressed portions 5 arranged in a certain pattern. In the present embodiment, the 1 st sheet 1 and the 2 nd sheet 2 constituting the composite sheet 10 are welded at the caulking portion 5, and the two sheets 1 and 2 are partially joined. That is, in the present embodiment, the compression seal portion 5 functions as a joining portion for joining the 1 st sheet 1 and the 2 nd sheet 2.

The central region M and the side regions S, S of the present embodiment each have a compressed portion 5 at the intersection 36 of the 1 st continuous recessed portion 31 and the 2 nd continuous recessed portion 35. In the central region M, a1 st compressed part 50, which is long in the width direction Y and is laterally long, and a 2 nd compressed part 53, which is square in plan view, are formed as compressed parts 5 in a fixed pattern. The 1 st compressed portion 50 is formed at an intersection 36a of the 1 st central continuous recessed portion 31a and the 2 nd central continuous recessed portion 35a, and has a laterally long shape that is long in the width direction Y. The 2 nd caulking portion 53 is formed in a portion 37a other than the intersection portion 36a, and has a square shape in plan view. The portion 37a other than the intersecting portion 36a is a portion where the 1 st continuous recessed portion 31a and the 2 nd continuous recessed portion 35a do not intersect.

The central region M can clearly form the 1 st and 2 nd central continuous concave portions 31a and 35a continuous in one direction by having the compressed part 5 at the intersection 36a, and can further improve air permeability and diffusibility.

The embossed portion 5 in the present embodiment is formed by embossing the 1 st sheet 1 and the 2 nd sheet 2 in a laminated state and densifying the embossed portion. When the topsheet 12 has a single-layer structure, the densified portion 5 serves as a high-density portion for increasing the density of the fibers constituting the topsheet 12. In the densified portion 5, the constituent fibers of the front sheet 12 may be fused and formed into a film, or the fiber form may be maintained.

As described above, the central region M in the present embodiment has the 1 st laterally long compression part 50 at the intersection 36 a. That is, the length a in the width direction Y of the 1 st compressed part 50 (see fig. 5 a) is larger than the length b in the longitudinal direction X of the diaper 100 (see fig. 5 a). With this configuration, the wide continuous concave portions 31a and 35a can be easily formed in the front sheet 12, and flexibility and absorption performance can be improved.

In the central region M, the compacted portion 50 formed at the intersection 36a may be divided into a plurality of 2, 3, or the like in the width direction Y. That is, as shown in fig. 7, the 1 st caulking section 50a may include a plurality of small caulking sections 51 and a spacer section 52. When the 1 st compression part 50a includes the spacer 52, the length a3 in the width direction Y of the 1 st compression part 50a is the length in the width direction Y including the spacer 52. When the spacer 52 is included, the 1 st compression part 50a preferably has a length a3 in the width direction Y longer than a length b3 in the longitudinal direction X (see fig. 7).

From the viewpoint of enhancing the flexibility and the absorption performance of the top sheet 12, the length a in the width direction Y of the 1 st compressed part 50 [ see fig. 5(a) ] is preferably 120% or more, more preferably 150% or more, and further preferably 500% or less, more preferably 300% or less, and further preferably 120% or more and 500% or less, more preferably 150% or more and 300% or less, with respect to the length b in the longitudinal direction X [ see fig. 5(a) ].

From the same viewpoint as described above, the length a in the width direction Y of the 1 st caulking section 50 [ see fig. 5(a) ] is preferably 105% or more, more preferably 120% or more, further preferably 150% or less, more preferably 140% or less, further preferably 105% or more and 150% or less, more preferably 120% or more and 140% or less, with respect to the width W1 of the 1 st central continuous recessed portion 31a [ see fig. 5(a) ].

In the central region M, a plurality of rows of 1 st inclined packing rows R1 in which the 1 st packing 50 and the 2 nd packing 53 are alternately arranged at a constant interval in the 1 st continuous concave portion 31a are formed along the direction D1 in which the 1 st continuous concave portion 31a extends, and a plurality of rows of 2 nd inclined packing rows R2 in which the 1 st packing 50 and the 2 nd packing 53 are alternately arranged at a constant interval in the 2 nd continuous concave portion 35a are formed along the direction D2 in which the 2 nd continuous concave portion 35a extends. The 1 st inclined packing row R1 and the 2 nd inclined packing row R2 intersect so as to share the 1 st packing 50 at the intersection 36a (see fig. 5 (a)).

In the central region M, a longitudinal 1 st packing row R5 in which a plurality of 1 st packing 50 are arranged in a plurality of rows is formed in the longitudinal direction X, a longitudinal 2 nd packing row R6 in which a plurality of 2 nd packing 53 are arranged in a plurality of rows is formed in the longitudinal direction X, and the longitudinal 1 st packing row R5 and the longitudinal 2 nd packing row R6 are alternately arranged in the width direction Y. The longitudinal 1 st packing row R5 and the longitudinal 2 nd packing row R6 partially overlap in the width direction Y, but these packing rows R5 and R6 may not partially overlap (see fig. 5 (a)).

In the central region M, a widthwise 1 st packing row R7 in which a plurality of 1 st packing 50 are arranged in a plurality of rows is formed in the widthwise Y direction, a widthwise 2 nd packing row R8 in which a plurality of 2 nd packing 53 are arranged in a plurality of rows is formed in the widthwise Y direction, and the widthwise 1 st packing row R7 and the widthwise 2 nd packing row R8 are alternately arranged in the lengthwise X direction [ see fig. 5(a) ].

In the side region S, S of the present embodiment, the side compressed parts 55 having a square shape in plan view are formed in a predetermined pattern as the compressed parts 5. The side-part compressed part 55 is formed at the intersection 36b of the 1 st side-part continuous recessed part 31b and the 2 nd side-part continuous recessed part 35 b. On the other hand, the compressed portion 5 is not formed at the portion 37b other than the intersection portion 36 b.

In terms of easily forming the 1 st and 2 nd continuous recessed portions 31a and 35a having a larger width than the side regions S, S in the central region M of the front sheet 12, the length a in the width direction Y of the compressed portion 5 in the central region M is preferably larger than the side regions S, S. That is, the length a in the width direction Y of the 1 st compressed part 50 is preferably longer than the length a1 in the width direction Y of the side compressed parts 55.

From the same viewpoint as described above, the length a in the width direction Y of the 1 st caulking section 50 [ see fig. 5(a) ] is preferably 120% or more, more preferably 150% or more, further preferably 500% or less, more preferably 300% or less, further preferably 120% or more and 500% or less, more preferably 150% or more and 300% or less, with respect to the length a1 in the width direction Y of the side caulking section 55 [ see fig. 5(b) ].

As described above, the central region M of the present embodiment has the 2 nd caulking section 53 at the portion 37a other than the intersection 36 a. In order to clearly form the convex portions 4a between the lattice-shaped concave portions 30a and prevent the convex portions 4a from being easily crushed even when they are brought into contact with the skin of the wearer, the compression portions 50 of the intersecting portions 36a in the central region M are preferably longer in the width direction Y than the 2 nd compression portions 53. That is, the length a in the width direction Y of the 1 st caulking section 50 is preferably larger than the length a5 in the width direction Y of the 2 nd caulking section 53.

From the viewpoint of making the convex portion 4a less likely to be crushed, the length a in the width direction Y of the 1 st compressed portion 50 is preferably 120% or more, more preferably 150% or more, and further preferably 500% or less, more preferably 300% or less, and further preferably 120% or more and 500% or less, more preferably 150% or more and 300% or less, with respect to the length a5 in the width direction Y of the 2 nd compressed portion 53.

In the central region M of the composite sheet 10, the projections 4a are arranged in a staggered pattern. More specifically, as shown in fig. 3, the convex portion 4a is arranged to have: a longitudinal projection row J1 in which a plurality of projections 4a are arrayed in series at regular intervals in the longitudinal direction X, a width projection row J2 in which a plurality of projections 4a are arrayed in series at regular intervals in the width direction Y, a1 st direction projection row J3 in which a plurality of projections 4a are arrayed in series at regular intervals in the direction D1 in which a1 st continuous recess 31a extends, and a 2 nd direction projection row J4 in which a plurality of projections 4a are arrayed in series at regular intervals in the direction D2 in which a 2 nd continuous recess 35a extends.

The arrangement positions of the projections 4a of the longitudinal projection row J1 adjacent to each other in the width direction Y are shifted by half a pitch in the longitudinal direction X, and the arrangement positions of the projections 4a of the width projection row J2 adjacent to each other in the longitudinal direction X are shifted by half a pitch in the width direction Y.

In the pair of side regions S, S of the composite sheet 10, the projections 4b are formed in a pattern different from the projections 4a formed in the central region M. The expression that the patterns of the convex portions are different includes a case where only the arrangement of the convex portions is different, a case where the forms of the convex portions are different, and a case where both of them are different. The different arrangement of the convex portions includes the case where the distances between the convex portions are different. The aspect in which the shape of the projection is different includes the case in which the shape of the projection in plan view is different. In the composite sheet 10 of the present embodiment, the arrangement and the form of the convex portions are different between the central region M and the pair of side regions S, S.

From the viewpoint of more reliably exhibiting one or two or more of the above-described effects, the convex portion 4 of the present invention preferably has the following structure.

The height H1[ see fig. 6(a) ] of the convex portion 4a in the central region M is preferably 0.5mm or more, more preferably 1.0mm or more, further preferably 5.0mm or less, further preferably 4.0mm or less, further preferably 0.5mm or more and 5.0mm or less, further preferably 1.0mm or more and 4.0mm or less. The height H3[ see fig. 6(b) ] of the projections 4b formed in the side region S is preferably 0.3mm or more, more preferably 0.6mm or more, and preferably 4.0mm or less, and more preferably 3.0mm or less, and more preferably 0.3mm or more and 4.0mm or less, and more preferably 0.6mm or more and 3.0mm or less.

The projections 4 in the present embodiment were observed with a digital microscope (manufactured by Keyence) for each projection cross section, and the shortest distance between the bottom surface of the 2 nd sheet 2 and the top of the projection was measured and the obtained value was defined as the height of the projection.

When the front sheet 12 is not a composite sheet 10 but a single-layer sheet, the height of the convex portion 4 is a value obtained by measuring the shortest distance from the lower surface of the single-layer sheet constituting the front sheet 12 to the top of the convex portion.

In the present embodiment, in each of the continuous recessed portions 31 and 35 in the central region M, 1 of the 2 nd caulking portions 53 may be provided between the respective intersecting portions 36a, that is, at the portion 37a other than the intersecting portion 36a, or a plurality of 2 nd caulking portions 53 such as 2 may be provided. The convex portion 4a in the central region M is surrounded by 4 1 st compressed portions 50 formed at 4 intersecting portions 36a existing around the convex portion 4a, and 4 2 nd compressed portions 53 existing between the 1 st compressed portions 50. In the central region M, the number of the compressed portions 5 surrounding the convex portion 4a is preferably 4 or more, more preferably 8 or more, and further preferably 20 or less, more preferably 16 or less. The number of the pressing portions 5 is preferably set to a pair sandwiching the convex portion 4a from both sides in the longitudinal direction X and the width direction Y.

In the composite sheet 10 of the present embodiment, as shown in fig. 5(a), a longitudinal 1 st row of compression parts R5 and a longitudinal 2 nd row of compression parts R6, which are arranged in series at intervals in the longitudinal direction X, are alternately formed in a plurality of rows in the width direction Y. In the longitudinal direction compressed portion rows R5 and R6, the compressed portions 50 and 53 of the longitudinal direction compressed portion rows adjacent in the width direction Y do not overlap in the longitudinal direction X. The caulking portions 50 and 53 of the longitudinal caulking portion rows R5 and R6 adjacent to each other in the width direction Y may overlap partially or entirely in the longitudinal direction X, or may be aligned with each other at the end portions in the longitudinal direction X.

In the production of the composite sheet 10 having the above-described structure, similarly to the method described in japanese patent laid-open No. 2015-112343 or patent document 1, the strip-shaped 1 st sheet 1 is fed between the 1 st and the 2 nd rolls having circumferential surfaces in a shape of meshing with each other, the 1 st sheet 1 is deformed into a concave-convex shape, the 1 st sheet 1 is moved along the circumferential surface portion of the 1 st roll to be separated from the meshing portion, the 2 nd sheet 2 is fed so as to overlap with the 1 st sheet 1, and the two sheets 1 and 2 are pressed under heat between the convex portion of the 1 st roll and the heating roll to be partially joined. In this case, the uneven shapes of the 1 st roller and the 2 nd roller and the patterns of the nip formed by the 1 st roller and the heat roller are made different between the center portion and the side portion of the 1 st sheet. Further, when the 1 st sheet 1 is caused to bite into the meshing portion between the 1 st roll and the 2 nd roll and deformed into the uneven shape, it is preferable to attract the 1 st sheet in the roll inner direction to promote the deformation of the 1 st sheet 1 into the uneven shape.

The present invention has been described above based on preferred embodiments, but the present invention is not limited to the above embodiments and can be modified as appropriate.

For example, the shape of the convex portion 4 and the compressed portion 5 surrounding the convex portion 4, and the arrangement thereof can be determined as appropriate. The shape of each compression part may be any shape other than a rectangle or a square, such as a circle, an ellipse, an oval, a triangle, a quadrangle, a pentagon, a hexagon, a star, a heart, or a triangle.

The absorbent article of the present invention may be a pants-type (pull-on type) disposable diaper instead of an open-type disposable diaper, or may be a pants-type or ordinary non-pants-type menstrual sanitary napkin, or may be an incontinence pad, a panty liner, or the like.

With regard to the above embodiment, the present invention further discloses the following absorbent article.

＜1＞

An absorbent article comprising a front sheet, a back sheet, and an absorber disposed between the front sheet and the back sheet, and having a longitudinal direction corresponding to the front-back direction of a wearer and a width direction orthogonal to the longitudinal direction,

the front surface sheet has a central region located at a central portion in the width direction and a pair of side regions located on both sides of the central region,

the central region and the side regions have lattice-shaped recesses and projections, respectively, and the lattice-shaped recesses include: a plurality of 1 st continuous recesses arranged at regular intervals and continuously extending in one direction; and a plurality of 2 nd continuous recessed portions arranged at regular intervals and extending continuously in a direction intersecting the one direction, the convex portion being surrounded by the 1 st continuous recessed portion and the 2 nd continuous recessed portion, the 1 st continuous recessed portion and the 2 nd continuous recessed portion being non-parallel with respect to the longitudinal direction and the width direction, respectively,

the width of the 1 st and 2 nd continuous recesses of the central region is larger than that of the side regions.

＜2＞

The absorbent article according to < 1 >, wherein the width W1 of the 1 st continuous concave portion in the central region is preferably 120% or more, more preferably 130% or more, and further preferably 250% or less, more preferably 180% or less, with respect to the width W6 of the 1 st continuous concave portion in the side region.

＜3＞

The absorbent article according to the above < 1 > or < 2 >, wherein the width W1 of the 1 st continuous concave portion in the central region is preferably 80% or more, more preferably 90% or more, and further preferably 120% or less, more preferably 110% or less, with respect to the width W3 of the 2 nd continuous concave portion in the central region.

＜4＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 3 >, wherein the width W1 of the 1 st continuous concave portion in the central region is preferably 0.5mm or more, more preferably 1mm or more, and further preferably 5mm or less, more preferably 3mm or less.

＜5＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 4 >, wherein the width W6 of the 1 st continuous recess in the side region is preferably 80% or more, more preferably 90% or more, and further preferably 120% or less, more preferably 110% or less, with respect to the width W8 of the 2 nd continuous recess in the side region.

＜6＞

The absorbent article according to any one of the items < 1 > to < 5 >, wherein the inclination angles of the 1 st continuous concave portion and the 2 nd continuous concave portion in the central region with respect to the width direction are larger than the inclination angles of the 1 st continuous concave portion and the 2 nd continuous concave portion in the side regions with respect to the width direction, respectively.

＜7＞

The absorbent article according to any one of the items < 1 > to < 6 >, wherein a difference between an inclination angle θ 1 of the 1 st continuous concave portion in the central region with respect to the width direction and an inclination angle θ 6 of the 1 st continuous concave portion in the side region with respect to the width direction is preferably 10 ° or more, more preferably 20 ° or more, and further preferably 45 ° or less, more preferably 35 ° or less.

＜8＞

The absorbent article according to any one of the items < 1 > to < 7 >, wherein a difference between an inclination angle θ 1 of the 1 st continuous concave portion in the central region with respect to the width direction and an inclination angle θ 3 of the 2 nd continuous concave portion in the central region with respect to the width direction is preferably 0 ° or more and 10 ° or less, and more preferably 0 ° or more and 5 ° or less.

＜9＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 8 >, wherein an inclination angle θ 1 of the 1 st continuous concave portion in the central region with respect to the width direction is preferably 45 ° or more, more preferably 50 ° or more, and further preferably 80 ° or less, more preferably 70 ° or less.

＜10＞

The absorbent article according to any one of the items < 1 > to < 9 >, wherein a difference between an inclination angle θ 6 of the 1 st continuous concave portion in the side region with respect to the width direction and an inclination angle θ 8 of the 2 nd continuous concave portion in the side region with respect to the width direction is preferably 0 ° or more and 10 ° or less, and more preferably 0 ° or more and 5 ° or less.

＜11＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 10 >, wherein the interval between the 1 st continuous concave portions is larger and the interval between the 2 nd continuous concave portions is larger in the central region than in the side regions.

＜12＞

The absorbent article according to any one of the items < 1 > to < 11 >, wherein the interval L1 between the 1 st continuous recessed portions in the central region is preferably 110% or more, more preferably 130% or more, and further preferably 250% or less, more preferably 200% or less, with respect to the interval L6 between the 1 st continuous recessed portions in the side regions.

＜13＞

The absorbent article according to any one of the items < 1 > to < 12 >, wherein the interval L1 between the 1 st continuous recessed portions in the central region is preferably 80% or more, more preferably 90% or more, and further preferably 120% or less, more preferably 110% or less, with respect to the interval L3 between the 2 nd continuous recessed portions in the central region.

＜14＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 13 >, wherein the interval L1 between the 1 st continuous concave portions in the central region is preferably 2mm or more, more preferably 4mm or more, and further preferably 10mm or less, more preferably 8mm or less.

＜15＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 14 >, wherein the interval L6 between the 1 st continuous recessed portions in the side region is preferably 80% or more, more preferably 90% or more, and further preferably 120% or less, more preferably 110% or less, with respect to the interval L8 between the 2 nd continuous recessed portions in the side region.

＜16＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 15 >, wherein the central region has a compressed portion at an intersection of the 1 st continuous concave portion and the 2 nd continuous concave portion.

＜17＞

The absorbent article according to any one of the items < 1 > to < 16 >, wherein the central region has a compressed portion at an intersection of the 1 st continuous concave portion and the 2 nd continuous concave portion, and a length of the compressed portion in the width direction is longer than a length of the compressed portion in the longitudinal direction.

＜18＞

The absorbent article according to the above < 16 > or < 17 >, wherein the compressed part includes a plurality of small compressed parts and a spacer part.

＜19＞

The absorbent article according to any one of the items < 16 > to < 18 >, wherein the length a of the densified portion in the width direction with respect to the length b of the densified portion in the longitudinal direction is preferably 120% or more, more preferably 150% or more, and further preferably 500% or less, more preferably 300% or less.

＜20＞

The absorbent article according to any one of the items < 17 > to < 19 >, wherein the length a of the densified portion in the width direction is preferably 105% or more, more preferably 120% or more, and further preferably 150% or less, more preferably 140% or less, with respect to the width W1 of the 1 st continuous recessed portion in the central region.

＜21＞

The absorbent article according to any one of the above-mentioned items < 1 > to < 20 >, wherein the central region and the side regions each have a compressed portion at an intersection of the 1 st continuous concave portion and the 2 nd continuous concave portion,

the length of the compressed portion in the width direction in the central region is longer than that in the side regions.

＜22＞

The absorbent article according to any one of the items < 16 > to < 21 >, wherein the length a of the densified portion in the width direction in the central region is preferably 120% or more, more preferably 150% or more, and further preferably 500% or less, more preferably 300% or less, with respect to the length a1 of the densified portion in the width direction in the side regions.

＜23＞

The absorbent article according to any one of the above-mentioned items < 16 > to < 22 >, wherein the central region has a 2 nd compressed portion other than the intersection portion,

the length of the width direction of the compression part of the intersection part is longer than that of the 2 nd compression part.

＜24＞

The absorbent article according to < 23 >, wherein, in the central region, a plurality of rows of 1 st oblique compressed portion rows R1 in which the compressed portions and the 2 nd compressed portions are alternately arranged at regular intervals in the 1 st continuous concave portion are formed along a direction in which the 1 st continuous concave portion extends, and a plurality of rows of 2 nd oblique compressed portion rows R2 in which the compressed portions and the 2 nd compressed portions are alternately arranged at regular intervals in the 2 nd continuous concave portion are formed along a direction in which the 2 nd continuous concave portion extends.

＜25＞

The absorbent article according to < 24 >, wherein the 1 st oblique compressed portion row and the 2 nd oblique compressed portion row intersect so as to share the compressed portions at the intersecting portions.

＜26＞

The absorbent article according to any one of the items < 23 > to < 25 >, wherein the length a of the compressed part in the width direction is preferably 120% or more, more preferably 150% or more, and further preferably 500% or less, more preferably 300% or less, with respect to the length a5 of the 2 nd compressed part in the width direction.

＜27＞

The absorbent article according to any one of the items < 1 > to < 26 >, wherein the convex portions are arranged in a scattered manner between the lattice-shaped concave portions in each of the central region and the side regions.

＜28＞

The absorbent article according to any one of the items < 1 > to < 29 >, wherein the height H1 of the protrusions in the central region is preferably 0.5mm or more, more preferably 1.0mm or more, and further preferably 5.0mm or less, and even more preferably 4.0mm or less.

＜29＞

The absorbent article according to any one of the items < 1 > to < 28 >, wherein the height H3 of the projections formed in the side regions is preferably 0.3mm or more, more preferably 0.6mm or more, and further preferably 4.0mm or less, more preferably 3.0mm or less.

Industrial applicability of the invention

According to the absorbent article of the present invention, it is possible to achieve both prevention of side leakage and diffusion of excretory fluid while having excellent air permeability.