TWI566756B - Absorbent items - Google Patents

Description

Absorbent article

The present invention relates to an absorbent article such as a disposable diaper.

Heretofore, an absorbent article using a bulk absorbent body (absorbent core) provided with a groove extending in the planar direction has been known (see Patent Documents 1 and 2). In the absorbent body provided in the absorbent article of the first aspect of the invention, a plurality of longitudinal embossed concave portions extending from the substantially central portion in the longitudinal direction to the front side portion and the back side portion are disposed at intervals in the width direction. . When such an absorber is provided, the body fluid is easily diffused by the longitudinal embossed concave portion, and the absorbability of the body fluid in use is improved.

However, since the longitudinal embossed concave portion of the absorbent body described in Patent Document 1 is formed by embossing, the density of the longitudinal embossed concave portion is increased, and the rigidity of the entire absorbent body is improved.

On the other hand, the absorbent core system of the disposable diaper described in Patent Document 2 is completely divided into imaginary lines extending in the front-rear direction, and is also completely divided along the imaginary line in the direction orthogonal to the imaginary line. . As described above, since the absorbent core is completely divided to form a groove, the absorbability of the body fluid during use is improved, and the rigidity of the entire absorbent core is lowered, and the flexibility is improved.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2005-73921

Patent Document 2: Japanese Patent Laid-Open No. Hei 11-216161

However, in the absorbent body of the absorbent article described in Patent Document 2, since the absorbent core is completely divided to form a groove, the strength of the absorbent core is remarkably lowered, and the shape of the absorbent core is deformed after the body fluid is absorbed.

The present invention provides an absorbent article comprising a front sheet disposed on the opposite side of the skin, a back sheet disposed on the non-skin facing surface side, and a longitudinally disposed absorbent body disposed between the two sheets . The absorbent article has a shape in which the central portion in the longitudinal direction is tapered inward. The above absorbent body has an absorbent core comprising an absorbent polymer. The absorptive core body includes: a block-shaped region which is composed of a plurality of convex portions including a convex portion having a relatively high basis weight, and a block structure surrounding the groove portions each having a relatively low basis weight from the front side portion A plurality of portions are arranged in the longitudinal direction and the width direction in a regular manner across the back side portion; and a non-block-shaped region surrounding the outer circumference of the block-shaped region. The convex portion and the groove portion are integrally formed. The side portion of the non-block-like region that is outward in the width direction of the side edge of the block-shaped region in the plan view, the back side portion or the ventral side of the side portion of the non-block-shaped region The area of the portion is larger than the area of the crotch portion of the side portion of the non-blocky portion.

1A‧‧‧ diapers

1B‧‧‧ diapers

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Binder

6‧‧‧Three-dimensional folds

7‧‧‧Buckle belt

8‧‧‧ buckle belt

9‧‧‧ Space

9X‧‧‧ space

9Y‧‧‧ Space

41‧‧‧Absorbable core

41A‧‧‧Absorbent core

41B‧‧‧Absorbent core

41T‧‧‧ skin facing

41U‧‧‧Non-skin contrast

41y‧‧‧lateral edge

42‧‧‧Covered timber

42s‧‧‧Side material side

43‧‧‧ convex

44‧‧‧Slots

44X‧‧‧ transverse slot

44Y‧‧‧Longitudinal slot

45‧‧‧Absorbable materials

46‧‧‧ Deposits

46a‧‧‧ parts

46b‧‧‧ parts

46c‧‧‧ parts

49‧‧‧ Absorbent body forebody

50‧‧‧Rotating cylinder

51‧‧‧Cylinder recess

52‧‧‧ stencil

53‧‧‧Insufficient gas-permeable components

54‧‧‧Area

55‧‧‧Area

56‧‧‧ Space

57‧‧‧ Space

58‧‧‧ Space

60‧‧‧ catheter

61‧‧‧Flexible components

62‧‧‧Three-dimensional pleat forming sheet

63‧‧‧ Leg elastic members

64‧‧‧Low elastic members

65‧‧‧vacuum box

67‧‧‧Exhaust pipe

70‧‧‧Feed roller

71‧‧‧ Space

75‧‧‧Net belt

80‧‧‧Vacuum conveyor

81‧‧‧ drive roller

82‧‧‧ driven roller

83‧‧‧ breathable belt

84‧‧‧vacuum box

90‧‧‧ Pressurizing mechanism

91‧‧‧ Roll

92‧‧‧roll

400‧‧‧Block structure

411‧‧‧Blocked area

411a‧‧‧Blocked area

411b‧‧‧Blocked area

411c‧‧‧block area

411y‧‧‧lateral edge

412‧‧‧Non-blocky area

412e‧‧‧ non-blocky end

412ea‧‧‧ non-blocky end

412eb‧‧‧ non-blocky end

412s‧‧‧ non-blocky area side

412sa‧‧‧ non-blocky area side

412sb‧‧‧ non-blocky area side

412sc‧‧‧ non-blocky area side

601‧‧‧ downstream side end

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧胯裆

CL‧‧‧ center line

I-I‧‧‧ hatching

L1‧‧‧ length

L2‧‧‧ length

L3‧‧‧Width

L4‧‧‧Width

R1‧‧ direction

R2‧‧‧ direction

T‧‧‧ thickness direction

W‧‧‧ interval

Wa‧‧‧Width

Wa1‧‧‧Width

Wb‧‧‧Width

Wb1‧‧‧Width

Wc‧‧‧Width

Wc1‧‧‧Width

X‧‧‧ horizontal direction

Y‧‧‧ longitudinal direction

Fig. 1 is a perspective view of an unfolded disposable diaper according to a first embodiment of the present invention.

Fig. 2 is a partially broken plan view of the disposable diaper shown in Fig. 1 as seen from the side of the front sheet.

Figure 3 is a cross-sectional view taken along line I-I of Figure 2.

Fig. 4 is a plan view showing the absorbent core of the disposable diaper shown in Fig. 1 as seen from the side of the back sheet.

Fig. 5 is a schematic view showing an example of a manufacturing apparatus of an absorbent body used in the unfolded disposable diaper according to the first embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view showing a portion (a recess) of the outer peripheral surface side of the rotary cylinder shown in Fig. 5 in the width direction.

Fig. 7 is a schematic cross-sectional view showing a state in which an absorbent material is deposited in a concave portion of the rotary cylinder shown in Fig. 5.

Fig. 8 is a perspective view showing an unfolded disposable diaper according to a second embodiment of the present invention.

Fig. 9 is a plan view showing the absorbent core of the disposable diaper shown in Fig. 8 as seen from the side of the back sheet.

Fig. 10 is a plan view showing another absorbent core of the disposable diaper according to the embodiment of the present invention as seen from the side of the back sheet.

Fig. 11 is a plan view showing another absorbent core of the disposable diaper according to the embodiment of the present invention as seen from the side of the back sheet.

Hereinafter, an absorbent article of the present invention will be described with reference to Figs. 1 to 4 based on preferred embodiments thereof. Fig. 1 is a perspective view showing a disposable diaper of the unfolded type diaper according to the first embodiment of the present invention, and Fig. 2 is a partially broken plan view showing the disposable diaper shown in Fig. 1 from the side of the front sheet, and Fig. 2 is shown in Fig. 2. II line profile. Further, Fig. 4 is a plan view showing an absorbent core body of the disposable diaper shown in Fig. 1.

As shown in Fig. 1 to Fig. 3, the disposable diaper 1A (hereinafter also referred to as "diaper 1A") of the first embodiment includes a front sheet 2 disposed on the opposite side of the skin, and is disposed on the non-skin facing side. The back sheet 3 and the vertically long absorber 4 disposed between the two sheets 2 and 3. As shown in Fig. 2, the diaper 1A is formed bilaterally symmetrically with respect to a center line CL extending in the longitudinal direction.

As shown in Fig. 2, the diaper 1A has a front side portion A and a back side portion B in the longitudinal direction (hereinafter also referred to as "Y direction", and the Y direction: a direction parallel to the center line CL). Wait for the crest between C and A. The ventral side A is located on the ventral side of the wearer when the diaper is worn, the back side B is located on the back side of the wearer, and the crotch part C is located on the lower part of the wearer. The crotch portion C is located at the central portion of the diaper 1A in the longitudinal direction (Y direction). The ventral portion A, the crotch portion C, and the back side portion B correspond to the diaper 1A in the unfolded state shown in FIG. An area that is equally divided in the longitudinal direction (Y direction). Further, the direction orthogonal to the longitudinal direction (Y direction) will be described as the lateral direction of the diaper 1A (hereinafter also referred to as "X direction").

In the present specification, the term "skin-facing surface" refers to a surface of the front and back surfaces of each member such as the front sheet 2 of the diaper 1A, which is disposed on the skin side of the wearer when worn; The "face" refers to the surface on the opposite side of the skin side of the wearer facing each other on the front and back sides of each member such as the front sheet 2.

In the diaper 1A, as shown in FIG. 2, the left and right side edges of the front side portion A and the left and right side edges of the back side portion B are more laterally oriented than the left and right side edges of the crotch portion C (X direction). ) The outside is extended. Further, the left and right side edges of the crotch portion C are curved in an arc shape inward in the lateral direction (X direction), and have a shape in which the central portion in the longitudinal direction (Y direction) is tapered inward. The front sheet 2 and the back sheet 3 project outward from the left and right side edges and the front and rear end edges of the absorber 4, respectively. As shown in FIG. 3, the front sheet 2 has a dimension in the lateral direction (X direction) smaller than the dimension of the back sheet 3 in the lateral direction (X direction). The front sheet 2 and the back sheet 3 are joined to each other by the projecting portion which protrudes outward from the peripheral edge of the absorber 4, or are sandwiched by other members, and the absorber 4 is sandwiched and fixed.

As shown in Fig. 1 and Fig. 2, the diaper 1A is a so-called unfolded diaper, and a pair of fastening tapes 7, 7 are provided on the left and right side edges of the back side portion B, and the outer surface of the ventral side A (non-skin The facing tape 8 is provided with a landing tape 8 for fixing the fastening tapes 7, 7. As shown in Fig. 2, each of the both side portions in the longitudinal direction (Y direction) of the diaper 1A is disposed and fixed to the three-dimensional gather forming sheet 62 having the elastic member 61 fixed in the Y direction in a stretched state. On the side portions of the front sheet 2, a pair of three-dimensional pleats 6, 6 are formed thereby (see Figs. 1 and 3). Further, as shown in Fig. 2, in each of the both side portions along the longitudinal direction (Y direction) of the diaper 1A, the plurality of leg elastic members 63 for forming the leg gathers are placed in the Y direction in a stretched state. The leg gathers are formed by the contraction of the leg elastic members 63.

As shown in FIGS. 2 and 3, the absorbent body 4 has an absorbent core 41 containing an absorbent polymer, and also has a covering material 42 covering the absorbent core 41 in the diaper 1A. In diaper 1A In the absorbent body 4, the absorbent core 41 having a liquid retaining property which is long in the longitudinal direction (Y direction) is formed by coating the covering material 42 as a liquid-permeable hydrophilic sheet.

As shown in FIG. 2 and FIG. 4, the absorptive core body 41 includes a block-shaped region 411 which is composed of a plurality of convex portions 43 including a convex shape having a relatively high basis weight and surrounding each convex portion 43 with a relatively large basis weight. The block structure 400 of the low groove portion 44 is formed from the front side portion A and the back side portion B and is regularly arranged in the longitudinal direction (Y direction) and the lateral direction (X direction); and the non-block region 412, which surrounds the outer periphery of the block region 411. Like the convex portion 43 having a high basis weight, the basis weight of the non-block region 412 is relatively high. Generally, the abdominal side A, the back side B, and the crotch portion C in the absorbent article (for example, a diaper) and the abdominal side A, the back side B, and the crotch portion C in the absorbent core, respectively. In the case where the abdominal side portion A, the back side portion B, and the crotch portion C of the absorbent core having the shape in which the central portion in the longitudinal direction (Y direction) is tapered in the vertical direction (the Y direction) is substantially identical, Distinguish according to the following criteria. That is, as shown in FIG. 4, on both sides of the absorbent core in the longitudinal direction (Y direction), the edge of the thinnest position (the closest position of the both side edges) is taken inwardly. The portion substantially parallel to each other (the region from the closest position to the front and the rear of the space W at a distance of 1.1 times the interval W from the closest position W at the position where the both side edges are closest to each other) is used as the absorption. In the crotch portion C of the core, a region of the side of the fastening tape 7 (rear side) in which the interval between the both side edges is larger than 1.1 times the interval W is defined as the back side portion B of the absorbent core, and the both side edges are The region on the side of the buckle 8 (front side) where the interval is larger than 1.1 times the interval W is distinguished as the abdominal portion A of the absorbent core. In this case, the crotch portion C of the absorbent core is largely compressed by the lateral direction (X direction) as the crotch portion of the wearer that is held at the innermost portion of the absorbent core, and is opposed to the crotch. In the crotch portion C, the portion in which the width of the absorptive core is expanded on the front side and is not easily compressed in the lateral direction is used as the front side portion A, and the portion in which the width of the absorptive core is expanded on the rear side and is not easily compressed in the lateral direction is used. The back side portion B is distinguished in order to impart necessary flexibility, liquid diffusibility, and liquid retainability to each portion.

In the diaper 1A, the groove portion 44 of the absorbent core 41 is included along the line as shown in Figs. 2 and 4 A longitudinal groove 44Y extending in the longitudinal direction (Y direction) and a lateral groove 44X extending in the lateral direction (X direction). Therefore, in the diaper 1A, the block-shaped region 411 of the absorbent core 41 is as shown in Figs. 2 and 4, and the block-like structure 400 is regularly and continuously arranged in the longitudinal direction from the front side A and the back side B ( Formed in the Y direction) and the lateral direction (X direction), the block structure 400 includes a vertical groove 44Y extending in the longitudinal direction (Y direction), a lateral groove 44X extending in the lateral direction (X direction), and The longitudinal groove 44Y and the lateral groove 44X are spaced apart from each other (the position of the lattice eye), and the base weight is higher than the plurality of longitudinally high base portions 43 of the portion of each of the groove 44Y and the lateral groove 44X. In the diaper 1A, the vertical grooves 44Y constituting the groove portion 44 extend in parallel in the longitudinal direction (Y direction) as shown in Figs. 2 and 4, but may extend in the longitudinal direction (Y direction). The curve can also extend obliquely. The same applies to the lateral grooves 44X constituting the groove portion 44. It is preferable that a plurality of lateral grooves extending in the lateral direction (X direction) are preferable from the viewpoint that the crease portion is thinned and the size is reduced, and the crease is less likely to be formed to improve the wearability at the time of wearing. One of the horizontal grooves 44X of the 44X is disposed at the same position as the broken line extending in the lateral direction (X direction) formed when the diaper 1A is folded in the longitudinal direction (Y direction).

In the present invention, in the non-block region 412, the non-block region side portion 412s which is outward in the width direction (X direction) from the side edge 411y in the longitudinal direction (Y direction) of the block region 411, The area of the back side portion B formed in the non-block-like region side portion 412s or the area of the front side portion A is larger than the area of the crotch portion C of the non-block-like region side portion 412s in plan view. Hereinafter, the absorbent core 41 of the diaper 1A will be specifically described. As shown in Fig. 4, in the absorbent core 41 of the diaper 1A, the width Wa of the entire abdominal portion A is the same as the width Wb of the entire back side portion B, and the width Wa1 of the block portion 411 of the front side portion A is The width Wb1 of the block-shaped region 411 of the back side portion B is the same. That is, as shown in FIGS. 2 and 4, the block region 411 is formed in a rectangular shape that is long in the longitudinal direction (Y direction), and the width Wa1 and the width of the back side portion B of the abdominal portion A of the block region 411 are wide. Wb1 is the same. As shown in FIGS. 2 and 4, the non-block regions 412 disposed around the outer periphery of the block region 411 have the same length on both sides of the side edges of the front side portion A and the side edges of the back side portion B. It protrudes outward in the lateral direction (X direction) from both side edges of the crotch portion C, and is generally shaped It becomes the shape in which the crotch C is inwardly narrowed.

When the block-shaped region 411 of the absorbent core body 41 is further described in detail, the diaper 1A is regularly disposed in the longitudinal direction (Y direction) from the front side portion A and the back side portion B as shown in FIG. 4 . In the block structure, the convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X are regularly arranged in the lateral direction (X direction) in five. In the block region 411 of the diaper 1A, as shown in FIG. 4, the six vertical grooves 44Y are linearly arranged from the front side A and the back side B, respectively.

As described above, the absorbent core 41 of the diaper 1A has a block-like region 411 which is formed by continuously arranging the block structure 400 in the longitudinal direction (Y direction) as shown in FIGS. 2 and 4, and has a block throughout the block. The non-block region 412 disposed over the entire circumference of the outer region 411. The non-block-like region 412 is divided into a non-block-like region side portion 412s and a non-block-like region end portion 412e as shown in FIG. 4, and the non-block-shaped region side portion 412s is compared with the longitudinal direction of the block-shaped region 411 (Y direction) The side edge 411y of the side is located outside the width direction (X direction), and the end portion 412e of the non-block portion is located between the side edges 411y and 411y of the end portion of the absorbent core 41 in the longitudinal direction (Y direction). Further, the non-block-like region side portion 412s of the non-block-like region 412 is divided into a non-block-like region side portion 412sa located on the ventral side of the abdominal side portion A of the absorbent core, as shown in FIG. The non-block-like region side portion 412sb on the back side of the back side portion B of the core, and the non-block-like region side portion 412sa and the back side non-block region located on the crotch portion C of the absorbent core and located on the ventral side The non-blocky region side portion 412sc of the crucible between the side portions 412sb. Further, the non-block-like region end portion 412e of the non-blocky region 412 is divided into the non-block-like region end portion 412ea located on the ventral side of the abdominal side portion A of the absorbent core as shown in FIG. The non-blocky region end 412eb of the back side of the back side B of the core. In the diaper 1A, as described above, the non-blocky region 412 is integrally formed as shown in Fig. 4 so that the crotch portion C is tapered inward, and the position of the crotch portion C of the absorbent core is close to the absorption. The ventral side A side of the sexual article is such that the area of the non-block-like region side portion 412sb on the back side in plan view is larger than the area of the non-block-like region side portion 412sc of the ridge.

As shown in FIGS. 2 and 4, the block structure 400 of the diaper 1A surrounds the outermost periphery of the block structure 400 by the groove portion 44 (the lateral groove 44X and the vertical groove 44Y). As shown in FIG. 2 and FIG. 4, in the block-shaped region 411 of the diaper 1A, since the block-like structure 400 is continuously arranged in the longitudinal direction (Y direction) and formed in a rectangular shape, it has four corner portions, and the block-shaped region 411 The outermost periphery is also surrounded by the groove portion 44 (the lateral groove 44X and the vertical groove 44Y). From the viewpoint of temporarily slowing the flow rate of the body fluid at the corner portion and easily dispensing the body fluid, and effectively applying the absorbent core, it is preferable to surround the groove portion 44 of the outermost circumference of the block region 411 (transverse groove 44X) The corner portion of the vertical groove 44Y), that is, the intersection portion of the groove portion 44 (the lateral groove 44X and the longitudinal groove 44Y) of each of the four corner portions of the block-shaped region 411 is curved, and further preferably Describe the curvature of the convex curve toward the outside.

When the absorbent core 41 is used in the disposable diaper 1A, the total length in the longitudinal direction (Y direction) is preferably 250 mm or more and 550 mm or less, and the total width in the lateral direction (X direction) is 50 mm or more and 200 mm or less. . The full length is the value measured at the longest position, and the full width is the value measured at the widest position.

As the non-block region 412, in the case of the disposable diaper 1A, the length in the longitudinal direction (Y direction) of each of both end portions in the longitudinal direction (Y direction) (non-block-shaped region end portion 412ea, The width of 412eb is 1% or more, preferably 2% or more of the total length of the absorbent core 41 in the Y direction, and is 20% or less, preferably 10% or less, more specifically, It is preferably 1% or more and 20% or less, and more preferably 2% or more and 10% or less. Specifically, the width of the non-block-like region end portions 412ea and 412eb is preferably 5 mm or more and 80 mm or less. The width of the non-block region end portion 412e is measured at the widest position.

As the non-block portion 412, in the case of being used in the disposable diaper 1A, the length in the lateral direction (X direction) of each of the both side portions in the longitudinal direction (Y direction) (non-block-like region side portion 412s) The width of the ventral side portion A (non-block-like region side portion 412sa) is 5% or more, preferably 15% or more of the total width of the absorbent core 41 in the X direction, and is 35% or less. Preferably, it is 25% or less in length, more specifically, preferably 5% or more and 35% or less in length, and further It is preferably 15% or more and 25% or less in length. Further, the width of the non-block-like region side portion 412s is 5% or more, preferably 15% or more of the entire width of the absorbent core 41 in the X-direction of the dam portion C (non-block-like region side portion 412sc). Further, it is 35% or less, preferably 25% or less, and more specifically, preferably 5% or more and 35% or less, and more preferably 15% or more and 25% or less. Further, the width of the non-block-like region side portion 412s is 5% or more, preferably 15% or more of the entire width of the absorbent core 41 in the X-direction of the back side portion B (non-block-like region side portion 412sb). Further, it is 35% or less, preferably 25% or less, and more specifically, preferably 5% or more and 35% or less, and more preferably 15% or more and 25% or less. Specifically, as the length in the lateral direction of each of the both side portions, the width of the non-block-like region side portion 412sa on the ventral side is preferably 10 mm or more and 40 mm or less, and the width of the non-block-like region side portion 412sc is preferably wider. The width of the non-block-shaped side portion 412sb on the back side is preferably 10 mm or more and 40 mm or less, in the range of 10 mm or more and 30 mm or less. The width of the non-block region side portion 412s is the value measured at the widest position.

When used in the disposable diaper 1A of the case, the non-bulk region of the ventral side portion of 412sa area (both sides of the portion of the area of each person) is preferably more than 1000mm ² 6000mm ² or less, the non-bulk region of the crotch The area of the side portion 412sc (the area of each of the both side portions) is preferably 500 mm ² or more and 5000 mm ² or less, and the area of the non-block portion side portion 412sb of the back side (the area of each of the both side portions) is preferably 1000 mm ^{2 .} Above 6000mm ² or less.

When the bulk region 411 is used in the disposable diaper 1A, the length in the longitudinal direction (Y direction) is 70% or more, preferably 85% or more of the total length of the absorbent core 41 in the Y direction. The length is 98% or less, preferably 95% or less, and more specifically, preferably 70% or more and 98% or less, and more preferably 85% or more and 95% or less.

When the block-shaped region 411 is used in the disposable diaper 1A, the length in the lateral direction (X direction) is 30% or more, preferably 50% or more of the total width of the absorbent core 41 in the X direction. The length is 90% or less, preferably 70% or less, more specifically In other words, the length is preferably 30% or more and 90% or less, and more preferably 50% or more and 70% or less.

When the block type region 411 is used in the disposable diaper 1A, the length in the longitudinal direction (Y direction) is preferably 100 mm or more and 540 mm or less, and the length in the lateral direction (X direction) is 20 mm or more and 140 mm or less. The length of the bulk region 41 in the longitudinal direction (Y direction) and the length in the lateral direction (X direction) are values measured at the longest position.

The size, basis weight, and the like of the convex portion 43 and the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) constituting the block region 411 will be described in detail.

In the diaper 1A, as shown in FIGS. 2 and 4, the convex portion 43 is formed in a rectangular shape that is long in the longitudinal direction (Y direction) in plan view. Further, in the diaper 1A, the rectangular portion 43 is formed in a rectangular shape in plan view, but the four corners may have an arc shape, and may be a polygonal shape, an ellipse, a combination thereof, or the like.

As the convex portion 43 of the diaper 1A, when the absorbent article is used in, for example, a disposable diaper, as shown in Fig. 4, the length L1 in the longitudinal direction (Y direction) is 5 mm or more, preferably 15 mm or more, and 30 mm or less is preferably 25 mm or less, and more specifically, preferably 5 mm or more and 30 mm or less, and more preferably 15 mm or more and 25 mm or less. Further, the length L2 in the lateral direction (X direction) is 3 mm or more, preferably 5 mm or more, and 20 mm or less, preferably 15 mm or less, more specifically 3 mm or more and 20 mm or less, and more preferably 5mm or more and 15mm or less. Further, the lengths L1 and L2 are values measured at the widest position.

As the groove portion 44 of the diaper 1A, when the absorbent article is used in, for example, a disposable diaper, as shown in Fig. 4, the width L3 of the linear lateral groove 44X extending in the lateral direction (X direction) is 0.5 mm or more. Preferably, it is 1 mm or more, and is 5 mm or less, preferably 3 mm or less, and more specifically, it is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less. Further, the width L4 of the linear longitudinal groove 44Y extending in the longitudinal direction (Y direction) is 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 3 mm. More specifically, it is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less. Further, the widths L3 and L4 are measured values at the bottom position of the concave portion in the uneven structure of the absorbent core 41.

The lateral groove 44X and the vertical groove 44Y are formed to have the same thickness, and the thickness of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is preferably 30% or more and 90% or less of the thickness of the convex portion 43. Specifically, the thickness of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is 1.5 mm or more, preferably 2.5 mm or more, and 4.5 mm or less, preferably 4.0 mm or less, and more specifically, preferably. It is 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 4.0 mm or less. The thickness of the convex portion 43 is 2 mm or more, preferably 3 mm or more, and 8 mm or less, preferably 7 mm or less, and more specifically 2 mm or more and 8 mm or less, and more preferably 3 mm or more and 7 mm or less. The thickness of the non-block region 412 is the same as the thickness of the convex portion 43.

Further, the thickness of the convex portion 43, the groove portion 44 (the lateral groove 44X, the vertical groove 44Y), and the non-block portion 412 cut the sample into a specific size, and pressurize the measurement portion at 10 kPa for 10 minutes. The assay is performed immediately. The measurement site is set to include one or more of the ventral portion, the crotch portion, and the back portion, and the average of the two diaper samples (the measurement portion is six or more). thickness. For example, the diaper 1 is cut in the longitudinal direction (Y direction) or the lateral direction (X direction) shown in Fig. 2 by a sharp razor, and the cross section of the cut sample is measured. In the case where it is difficult to measure with the naked eye, the cross section of the cut sample can be measured by, for example, a microscope (VHX-1000 manufactured by KEYENCE Corporation) at a magnification of 20 to 100 times.

In the case where the absorbent article is used in, for example, a disposable diaper, the basis weight of the groove portion 44 (the lateral groove 44X, the longitudinal groove 44Y) is the basis weight of the convex portion 43 from the viewpoint of improving the flexibility and the absorbability. 30% or more, preferably 40% or more, and 90% or less, preferably 80% or less, more specifically, 30% or more and 90% or less, further preferably 40% or more and 80% or less.

Specifically, the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) has a basis weight of 100 g/m ² or more, preferably 150 g/m ² or more, and 500 g/m ² or less, preferably 400 g/ m ² or less, more specifically, it is preferably 100 g/m ² or more and 500 g/m ² or less, and more preferably 150 g/m ² or more and 400 g/m ² or less. Further, the convex portion 43 has a basis weight of 300 g/m ² or more, preferably 350 g/m ² or more, and 900 g/m ² or less, preferably 800 g/m ² or less, and more specifically, preferably. It is 300 g/m ² or more and 900 g/m ² or less, and more preferably 350 g/m ² or more and 800 g/m ² or less. The basis weight of the non-block region 412 is the same as the basis weight of the convex portion 43.

The basis weight of the convex portion 43 and the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) was measured as follows.

<Method for measuring basis weight>

The method of measuring the basis weight of the convex portion 43, the groove portion 44 (the lateral groove 44X, the vertical groove 44Y), and the non-block portion 412 is as follows.

A single-edged razor manufactured by FEATHER Co., Ltd. was cut along the boundary line between the convex portion 43 of the absorbent core 41 and the groove portion 44 (the lateral groove 44X, the longitudinal groove 44Y). Ten small pieces of the convex portion 43 obtained by cutting were measured using an electronic balance (electronic balance GR-300 manufactured by A & D Co., Ltd., accuracy: four decimal places), and one small piece of the convex portion 43 was obtained. Average weight. The basis weight of the convex portion 43 is calculated by dividing the obtained average weight by the average area of each small piece of the convex portion 43. The basis weight of the non-block region 412 is also calculated in the same manner as the basis weight of the convex portion 43.

Then, along the boundary line extending in the longitudinal direction (Y direction) between the convex portion 43 and the groove portion 44 (longitudinal groove 44Y), FEATHER is used in a design size of a width of 100 mm and a width of the groove portion 44 (longitudinal groove 44Y). The company's single-edged razor cuts into five small pieces of a thin stripe-shaped groove portion 44 (longitudinal groove 44Y). The electronic scales (electronic balance GR-300 manufactured by A & D Co., Ltd., accuracy: 4 digits after the decimal point) were used for the obtained five small pieces, and the grooves 44 (longitudinal grooves 44Y) were obtained by averaging. The average weight of 1 small piece. The basis weight of the groove portion 44 (longitudinal groove 44Y) was calculated by dividing the obtained average weight by the average area of each small piece of the groove portion 44 (longitudinal groove 44Y). Regarding the groove portion 44 (the lateral groove 44X), the groove portion 44 (the vertical groove) 44Y) Calculate the basis weight in the same way.

In the absorbent core 41 of the diaper 1A, the convex portion 43 and the non-block portion 412 are formed to have the same or higher density than the groove portion 44 (the lateral groove 44X and the vertical groove 44Y).

In the case where the absorbent article is used in, for example, a disposable diaper, the density of the groove portion 44 (the lateral groove 44X, the longitudinal groove 44Y) is the density of the convex portion 43 from the viewpoint of improving liquid diffusibility and liquid retention. 50% or more, preferably 75% or more, and 100% or less, preferably 95% or less, more specifically, 50% or more and 100% or less, further preferably 75% or more and 95% or less.

Specifically, the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) has a density of 0.05 g/cm ³ or more, preferably 0.07 g/cm ³ or more, and 0.15 g/cm ³ or less, preferably 0.13 g/cm ³ or less, more specifically, it is preferably 0.05 g/cm ³ or more and 0.15 g/cm ³ or less, and more preferably 0.07 g/cm ³ or more and 0.13 g/cm ³ or less. Further, the convex portion 43 has a density of 0.05 g/cm ³ or more, preferably 0.07 g/cm ³ or more, and 0.15 g/cm ³ or less, preferably 0.13 g/cm ³ or less, and more specifically, more specifically It is preferably 0.05 g/cm ³ or more and 0.15 g/cm ³ or less, and more preferably 0.07 g/cm ³ or more and 0.13 g/cm ³ or less. The density of the non-block regions 412 is the same as the density of the convex portions 43.

The density of the convex portion 43, the non-block portion 412, and the groove portion 44 (the lateral groove 44X, the longitudinal groove 44Y) is the basis weight of the convex portion 43, the non-block portion 412, and the low density portion 44 obtained by the above method. It is calculated by dividing the thickness of each obtained by the above method.

As described above, as shown in FIG. 3, the convex portion 43 and the groove portion 44 (the lateral groove 44X and the longitudinal groove 44Y) of the absorbent core 41 are integrally formed, and the non-block portion 412 is also combined with the convex portion 43 and the groove portion 44. (the lateral grooves 44X and the longitudinal grooves 44Y) are integrally formed. Here, "molding in one piece" means that the convex portion 43, the groove portion 44 (the lateral groove 44X, the vertical groove 44Y), and the non-block portion 412 are not inseparably integrated with each other without bonding means such as an adhesive or heat fusion. And formed integrally from the same material. As described above, when the convex portion 43, the groove portion 44 (the lateral groove 44X, the vertical groove 44Y), and the non-block portion 412 are integrally formed, the continuity of the body fluid can be smoothly moved. About this absorption The manufacturing method of the body 4 will be described below.

Further, the concave portion (groove) which is recessed toward the front sheet 2 side in the block-like structure 400 having the unevenness of the absorbent core 41 is mainly formed by the groove portion 44 (the lateral groove 44X, the longitudinal groove 44Y), and the absorbent core 41 is formed. The convex portion protruding toward the back sheet 3 in the block structure 400 is mainly formed by the convex portion 43 and the non-block portion 412. Here, the term "the concave portion is mainly formed by the groove portion 44" means that, for example, the convex portion 43 near the boundary between the groove portion 44 and the convex portion 43 is formed as a part of the concave portion; similarly, the "protrusion portion is mainly composed of The convex portion 43 and the non-block portion 412 are formed, which means that the groove portion 44 near the boundary between the convex portion 43 and the groove portion 44 is formed as a part of the convex portion, for example.

In the absorbent core 41 of the diaper 1A, as shown in FIG. 3, the groove portion 44 is biased on the side of the front sheet 2 in the thickness direction T of the diaper 1A (the skin facing surface side of the absorbent body 4). As shown in FIG. 3, the absorbent core 41 of the diaper 1A has a block-like structure 400 having irregularities on the non-skin opposing surface side of the absorbent core 41, and the skin facing surface side of the absorbent core 41 is flat.

In the diaper 1A, the absorbent core 41 and the covering material 42 covering the absorbent core 41 are fixed via the adhesive 5 . The absorber 4 thus fixed is fixed to the front sheet 2 and the back sheet 3 via an adhesive. In particular, in the diaper 1A, as shown in FIG. 3, the covering material 42 and the non-skin opposing surface 41U of the absorbent core 41 are fixed by the adhesive 5, and the covering material 42 and the skin of the absorbent core 41 oppose each other. The surface 41T is fixed by the adhesive 5, and the covering material 42 is closer to the covering material side portion 42s in the width direction (X direction) than the side edge 41y in the longitudinal direction (Y direction) of the absorbent core 41. The covering material side portions 42s are fixed to each other via the adhesive 5 . When the covering member side portions 42s are fixed to each other via the adhesive 5 in this manner, leakage of the body fluid from the side portion of the absorbent core 41 can be prevented, the wet strength of the absorbent core 41 can be improved, and the damage can be prevented. Sex. The adhesive 5 is applied intermittently in the lateral direction (X direction) of the diaper 1A and linearly in the longitudinal direction (Y direction). In the diaper 1A, as shown in Fig. 3, the absorbent core 41 is coated so that the side edges of the covering member 42 are folded over and the side edges of the covering member 42 are overlapped with each other. Two sheets of coated material can be used separately to coat the absorbency Core 41.

In the diaper 1A, the adhesive 5 is applied in a line shape in the transverse direction (X direction) and in the longitudinal direction (Y direction) using, for example, a bead gun, and is applied in a stripe shape as a whole. The distance between the adjacent adhesives 5 in the lateral direction (X direction) is preferably 0.5 mm or more and 15 mm or less. The basis weight (coating amount) of the coating agent 5 is 0.5 g/m ² or more, preferably 1 g/m ² or more, and 15 g/m ² or less, preferably 10 g/m ² or less, more specifically It is preferably 0.5 g/m ² or more and 15 g/m ² or less, and more preferably 1 g/m ² or more and 10 g/m ² or less.

Further, in the diaper 1A, as shown in FIG. 3, a space 9 is formed between the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) of the absorbent core 41 and the covering member 42. That is, a space 9 formed by the block structure 400 having the unevenness of the absorbent core 41 and the covering material 42 covering the absorbent core 41 is formed in the absorber 4. As described above, in the diaper 1A, as shown in Figs. 2 and 3, the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is integrally formed in a lattice shape on the back sheet 3 of the absorbent core 41 (non-skin On the side of the facing surface, a convex portion 43 is disposed at a position of the lattice eye, and the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is formed to surround the convex portion 43. Therefore, in the diaper 1A, as shown in Figs. 2 and 3, the plurality of spaces 9X formed by the lateral grooves 44X recessed toward the front sheet 2 side and the covering member 42 correspond to the lateral grooves 44X in the lateral direction ( The X direction) is continuously extended, and the plurality of spaces 9Y formed by the vertical grooves 44Y recessed toward the front sheet 2 side and the covering material 42 are continuously extended in the longitudinal direction (Y direction) corresponding to the vertical grooves 44Y.

Next, the absorbent body 4 provided in the diaper 1A includes a convex portion 43 (high density), a non-block portion 412 (high density), and a groove portion 44 (low density) (transverse groove 44X, longitudinal groove 44Y). A method of manufacturing the absorbent body 4 of the formed absorbent core 41 will be described.

Fig. 5 shows an embodiment of a method of manufacturing the absorbent body 4 and a manufacturing apparatus used therefor. The manufacturing apparatus of the absorber 4 includes a rotary cylinder 50 which is rotationally driven in the direction of the arrow R1, and a duct 60 which supplies the raw material of the absorbent core 41, that is, the absorbent material 45 containing the absorbent polymer, to the outer circumference of the rotary cylinder 50. a transfer roller 70 disposed obliquely below the downstream side of the rotary cylinder 50 and rotationally driven in the direction of the arrow R2; A vacuum box 65 disposed between the duct 60 and the transfer roller 70 in the circumferential direction of the rotary cylinder 50; a mesh belt 75 as a gas permeable member to pass through the vacuum box 65 Arranged between the rotating drum 50 and between the conveying roller 70 and the rotating drum 50; and a vacuum conveyer 80 disposed below the conveying roller 70.

The rotating cylinder 50 is formed in a cylindrical shape as shown in Fig. 5, and receives power from a prime mover such as a motor, and rotates a member forming the outer peripheral surface thereof around the horizontal axis. A non-rotating portion on the inner side (rotational axis side) of the rotary cylinder 50 is formed with a space 56 for decompressing the inside. A known exhaust device (not shown) such as an intake fan is connected to the space 56, and by operating the exhaust device, the space 56 can be maintained at a negative pressure. On the other hand, a space (not shown) for sucking air outside the device is connected to the spaces 57 and 58 on the inner side (rotational axis side) of the rotary cylinder 50.

As shown in Fig. 5, a cylindrical recess 51 having a plurality of shapes corresponding to the shape of the absorbent core 41 to be manufactured is formed at equal intervals in the R1 direction on the outer peripheral surface of the rotary cylinder 50. As shown in FIG. 6, a mesh plate 52 in which a plurality of micropores are formed and a gas-impermeable member 53 made of metal or resin are disposed on the bottom surface portion of each of the cylindrical recesses 51. Here, the gas-impermeable member 53 is provided so as to protrude from the mesh plate 52, and is disposed so as to correspond to the shape and position of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) described above. As shown in Fig. 6, the region 54 composed only of the mesh plate 52 partitioned by the gas-impermeable member 53 disposed in this manner becomes a portion corresponding to the convex portion 43, and the outer portion is divided by the gas-impermeable member 53 A region 55 composed only of the stencil 52 in the entire region becomes a portion corresponding to the non-block region 412. Further, the portion of the outer peripheral surface of the rotating cylinder 50 in which the cylindrical recessed portion 51 is not formed is a frame body including the rotating cylinder 50 including a metal rigid body, and is non-breathable.

As shown in Fig. 5, the duct 60 has a one end side covering the outer peripheral surface of the rotary cylinder 50 in the space 56 maintained in the negative pressure, and a fiber material introduction device on the other end side (not shown). The fiber material introduction device includes a pulverizer that pulverizes, for example, a sheet of wood pulp as a woven pulp, and feeds the woven pulp (fiber material) into a conduit, and is in the middle of the conduit 60. An absorbing polymer introduction portion into which an absorbing polymer is introduced is provided. The transfer roller 70 includes a cylindrical outer peripheral portion having gas permeability, and receives power from a prime mover such as a motor, and rotates its outer peripheral portion in the R2 direction. A non-rotating portion on the inner side (rotational axis side) of the transfer roller 70 is formed with a space 71 for decompressing the inside. A known exhaust device (not shown) such as an intake fan is connected to the space 71, and by operating the exhaust device, the space 71 can be maintained at a negative pressure.

The vacuum box 65 is disposed in the rotation direction R1 of the rotary cylinder 50, and is disposed between the downstream end portion 601 of the duct 60 and the transfer roller 70. The vacuum box 65 has a box shape and has an opening that opens toward the rotating cylinder 50 at a portion facing the rotating cylinder 50. The vacuum box 65 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe 67, and the inside of the vacuum box 65 can be maintained at a negative pressure by the operation of the exhaust device.

The mesh belt 75 is formed by connecting a belt-shaped gas permeable belt having a mesh shape in a ring shape, and is guided by a plurality of free rollers and a transfer roller 70 to continuously move on a specific path. The mesh belt 75 is driven by the rotation of the transfer roller 70. The mesh belt 75 is in contact with the outer peripheral surface of the rotary cylinder 50 while passing through the opening of the vacuum chamber 65, and is separated from the outer peripheral surface of the rotary cylinder 50 near the closest portion of the transfer roller 70 and the rotary cylinder 50. The transfer to the transfer roller 70 is performed.

The vacuum conveyor 80 includes an annular gas permeable belt 83 that is mounted on the driving roller 81 and the driven roller 82, and a vacuum box 84 that is disposed at a position opposed to the conveying roller 70 via the gas permeable belt 83. .

Next, a method of continuously manufacturing the absorbent body 4 (absorbent core 41) using the above-described manufacturing apparatus of the absorbent body will be described.

First, the space 56 connected to the inside of the rotary cylinder 50 and the exhaust device in the vacuum chamber 65 are actuated to make the space 56 in the rotary cylinder 50 and the inside of the vacuum chamber 65 a negative pressure. This is because the inside of the space 56 is made to have a negative pressure, and the airflow in which the absorbent material 45 is conveyed to the outer peripheral surface of the rotating cylinder 50 is generated in the duct 60. Next, the rotary cylinder 50 and the transfer roller 70 are rotated, and the vacuum conveyor 80 is operated. Then, the fibrous material introduction device is operated to supply the woven pulp (fiber material) and the absorbent polymer into the catheter 60. Such suction The retractable material 45 is in a scattered state along with the airflow flowing in the duct 60 and is supplied toward the outer peripheral surface of the rotary cylinder 50.

The absorbent material 45 is sucked into the cylindrical recess 51 of the rotary cylinder 50 while the portion covered by the conduit 60 is being conveyed. As shown in FIG. 7, the absorbent material 45 is gradually deposited on the respective regions 54 of the cylindrical recess 51 and the mesh panel 52 of the region 55. In the deposit 46 thus obtained, the amount of the absorbent material 45 deposited in the portion (the corresponding portion of the gas-impermeable member 53) 46a in which the absorbent material 45 is deposited on the gas-impermeable member 53 is relatively small, and other portions ( The amount of deposition of the absorbent material 45 in the region 54 corresponding portion 46b and the portion (region 55 corresponding portion) 46c is relatively large, and the deposit 46 has a block structure having irregularities as a whole.

Then, if the rotating cylinder 50 rotates and the cylinder recess 51 is turned to the opposite position of the vacuum box 65, the deposit 46 in the cylindrical recess 51 is adsorbed on the mesh belt 75 by suction from the vacuum box 65. State. The deposit 46 in the cylindrical recess 51 is conveyed to the front side of the closest portion of the transfer roller 70 and the rotary cylinder 50 in this state, and in the vicinity of the closest portion, by suction from the transfer roller 70 side. The film is released from the tube recess 51 in a state of being adsorbed on the mesh belt 75, and is transferred to the transfer roller 70.

Thus, the stacked material 46 having the block structure transferred to the transfer roller 70 together with the mesh belt 75 is conveyed to the interface with the vacuum conveyor 80 in the case of the mesh belt 75 adsorbed on the transfer roller 70. (the lowermost end portion of the transfer roller 70), and the transfer portion is transferred to the vacuum conveyor 80 by suction of the vacuum box 84.

In the manufacturing apparatus of the absorbent body of the present embodiment, as shown in FIG. 5, a covering material 42 containing a toilet paper or a hydrophilic nonwoven fabric is introduced onto the vacuum conveyor 80 on which the deposit 46 is placed, and the deposit 46 is placed. Transfer to the covering material 42. Then, the covering material 42 is folded by the folding plate (not shown) to cover the deposit 46 with the covering material 42, and then the deposits 46 in the state covered by the covering material 42 are separated at a specific interval. By cutting, the absorbent body precursor 49 cut into a size equivalent to one absorbent body is continuously produced.

Then, in the manufacturing apparatus of the absorbent body of the present embodiment, the pressurizing mechanism 90 is used. The absorbent body precursor 49 thus obtained is compressed, and the thickness of the deposit 46 constituting the absorbent body precursor 49 is actively reduced, whereby the desired absorbent body 4 (absorbent core 41) is obtained. As shown in Fig. 5, the pressurizing mechanism 90 is configured to include at least one surface smoothing pair of rollers 91, 92, and pressurize the pressed object introduced between the rollers 91, 92 from the upper and lower surfaces. The compression is performed in the thickness direction.

When the deposit 46 is compressed by the pressurizing mechanism 90, the portion where the absorbent material is relatively large and the portion having a large thickness (the portion corresponding to the region 54) 46b and the portion (the portion corresponding to the region 55) 46c are relatively less than the absorbent material 45. The portion having a small thickness (corresponding portion of the gas-impermeable member 53) 46a is more strongly compressed. As a result, in the absorbent body 4 (absorbent core 41) manufactured by the above-described manufacturing apparatus, the portion (region 54 corresponding portion) 46b (protruding portion) and the portion (region 55 corresponding portion) 46c of the deposit 46 are formed. The convex portion 43 and the non-block portion 412 having a relatively high density in the absorbent core 41, and the portion (the corresponding portion of the gas-impermeable member 53) 46a (concave portion) of the deposit 46 become a relatively dense density in the absorbent core 41. The lower groove portion 44 (the lateral groove 44X and the vertical groove 44Y).

The material for forming the disposable diaper 1A of the present embodiment will be described.

The front sheet 2, the back sheet 3, and the three-dimensional pleat forming sheet 62 are generally used without any particular limitation as long as they can be used in an absorbent article such as a disposable diaper. For example, as the front sheet 2, a liquid permeable non-woven fabric, an apertured film, a laminate such as the like, or the like can be used. As the back surface sheet 3, a resin film, a laminate of a resin film and a non-woven fabric, or the like can be used. As the three-dimensional pleat-forming sheet 62, a stretchable film, a nonwoven fabric, a woven fabric, or the like can be used.

The adhesive tape 7 is generally used without any particular limitation as long as it can be used in an absorbent article such as a disposable diaper. For example, "Magic Tape (registered trademark)" (manufactured by KURARAY Co., Ltd.), "Quicklon (registered trademark)" (manufactured by YKK), "Magi Cloth (registered trademark)" (manufactured by Kanebo Bell-Touch Co., Ltd.), etc. can be used. Hook components, etc.

As the absorbent core 41 constituting the absorbent body 4, a set of fibers such as pulp fibers can be used. The type of particles of the absorbing polymer and the like are maintained in the fit. As the covering material 42 constituting the absorber 4, a hydrophilic sheet, for example, a packaged sheet material containing a water-permeable tissue (toilet paper) or a water-permeable nonwoven fabric can be used.

As the elastic member 61 for forming the three-dimensional pleats and the leg elastic member 63, a natural rubber, a polyurethane, a polystyrene-polyisoprene copolymer, a polystyrene-polybutadiene copolymer can be used. A filamentous stretchable material such as a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene.

The adhesive 5 is usually used without any particular limitation as long as it can be used in an absorbent article such as a disposable diaper. For example, a hot-melt adhesive can be used. As the hot-melt adhesive, for example, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butyl A block copolymer of a styrene-styrene copolymer (SEBS) is a hot melt adhesive.

The effect of the disposable diaper 1A of the first embodiment of the present invention described above will be described.

As shown in FIGS. 2 and 4, the diaper 1A has a block-like region 411 including a convex portion 43 having a relatively high basis weight and a groove portion 44 having a relatively low basis weight. Therefore, it is soft and easy to follow the shape of the wearer's body, and the conformability is improved. Further, since the body fluid after urination flows in the groove portion 44, the diffusibility is improved, and the absorbability of the absorbent core 41 can be improved. Further, as shown in FIGS. 2 and 4, the diaper 1A has a non-blocky region 412 that surrounds the outer periphery of the block-shaped region 411, so that the body fluid can be slowly absorbed at the side of the absorbent core, even after repeated urination. The absorption of the absorbent core 41 can be improved, and the leakage of the body fluid of the self-absorbent core 41 can be prevented. As described above, since the diaper 1A includes the absorbent core 41 having the block-like region 411, the absorbability of the body fluid in use is improved, and the flexibility of the entire absorbent body is improved.

Further, as shown in FIG. 2 and FIG. 4, the diaper 1A is formed in a non-block-like region side portion 412s of the non-block-like region 412 of the absorbent core 41 in a plan view, and is formed as a non-block-like region side portion 412s. The area of the back side portion B is larger than the area of the crotch portion C of the non-block portion side portion 412s. because Therefore, the back side portion B of the non-block-shaped side portion 412s which is less likely to be compressed from the lateral direction (X direction) is less likely to absorb the body fluid when worn, and the movement is relatively large when worn. Moreover, it is easy to receive the crotch portion C of the side portion 412s of the non-block portion compressed from the lateral direction, and does not excessively absorb the body fluid. As described above, even when the wearer core body 41 is not easily damaged by the wearer's movement, the shape retainability of the absorbent body after the body fluid absorption is improved. Further, in the crotch portion C, by increasing the block-like region 411 to improve the flexibility, it is easy to follow the movement of the crotch portion having a relatively large movement during wear, and the absorbent core 41 always exists closer to the body. Therefore, even if urine or the like is discharged, it is easily blocked and is not likely to cause leakage. Further, since the crotch portion has a large number of block regions 411, the discharged liquid can be quickly sent to the back side portion B.

Next, the unfolded disposable diaper 1B (hereinafter also referred to as "diaper 1B") according to the second embodiment of the present invention will be described with reference to Figs.

The diaper 1B of the second embodiment will be described as being different from the diaper 1A of the first embodiment. The aspect which is not specifically described is the same as that of the diaper 1A, and the description of the diaper 1A is suitably applied.

As shown in Fig. 8, the diaper 1B is a so-called unfolded diaper, and a pair of fastening tapes 7, 7 are provided on the left and right side edges of the back side portion B, between the pair of fastening tapes 7, 7 and the waist. The waist elastic member 64 for pleating formation is disposed in the X direction in a stretched state, and the waist elastic member 64 is contracted to form a waist gather. As the waist elastic member 64, a stretchable material similar to the elastic member 61 for forming the three-dimensional gathers and the leg elastic members 63 can be used.

The absorbent core 41 of the diaper 1B is similar to the absorbent core 41 of the diaper 1A, and as shown in Figs. 8 and 9, a plurality of convex portions 43 including a convex shape having a relatively high basis weight and surrounding convex portions are formed. The block structure 400 of the groove portion 44 having the relatively low basis weight and the back side portion B are regularly arranged in the longitudinal direction (Y direction) and the lateral direction (X direction) to form a plurality of blocks 400. The block region 411, the block region 411 of the diaper 1B is formed as shown in FIG. 9, and the widths Wa1, Wb1 of the abdominal portion A and the back side portion B of the block region 411 are larger than the block region 411. The width of the crotch portion C is Wc1. Specifically, the block region 411 of the diaper 1B can be roughly divided into three regions: a block-shaped region 411a disposed on the ventral side of the ventral portion A side of the diaper 1B, and a side portion B side disposed on the back side of the diaper 1B. The block-shaped region 411b on the back side and the block-like region 411c disposed between the block-shaped region 411a on the front side and the block-like region 411b on the back side. Further, as shown in FIG. 9, the block-shaped region 411a on the front side and the block-like region 411b on the back side project outward in the width direction (X direction) from the block-shaped region 411c. The width of the sulcular block-shaped region 411a (the width Wa1 of the ventral portion 411a of the block-like region 411) is the same as the width of the back-side block-like region 411b (the width Wb1 of the back side portion 411b of the block-like region 411).

The block region 411 of the absorbent core 41 will be specifically described. In the diaper 1B, as shown in Fig. 9, the back-side block-like region 411b is formed such that the convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X are regularly arranged in the lateral direction (X direction). The block structure is regularly arranged in four rows in the longitudinal direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction ( Three columns are arranged in the Y direction. Further, as shown in FIG. 9 , the block-shaped region 411 c is formed in such a manner that the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction (Y). Configure 3 columns on the direction). Further, as shown in Fig. 9, the ventral block-shaped region 411a is formed by arranging three convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X in the lateral direction (X direction). The block structure is regularly arranged in the vertical direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction (Y direction). Configure 4 columns. In the block region 411 of the diaper 1B, as shown in FIG. 9, four of the six vertical grooves 44Y are linearly arranged from the front side A and the back side B, respectively.

The absorbent core 41 of the diaper 1B has the block-shaped region 411 as described above and the non-block-like region 412 surrounding the outer periphery of the block-shaped region 411, and is formed in a shape in which the central portion in the longitudinal direction (Y direction) is tapered inward. If specifically described, the absorbent core 41 of the diaper 1B is as shown in FIG. In general, the width Wa of the entire abdominal portion A is larger than the width Wb of the entire back portion B, and the width Wc of the entire portion C is the narrowest. That is, the non-blocky region 412 of the diaper 1B is as shown in Fig. 9, and the sides of the side portions A and the side edges of the back side portion B are more inclined than the side edges of the crotch portion C. The lateral direction (X direction) is extended outward, and both side edges of the abdominal side portion A project outward in the lateral direction (X direction) from each of the both side edges of the back side portion B. Therefore, in the non-block-like region side portion 412s of the non-block-like region 412, the width of the ventral side portion A of the non-block-like region side portion 412s (the width of the non-blocky region side portion 412sa of the ventral side) is larger than the non-blocky region. The width of the back side portion B of the side portion 412s (the width of the non-block portion side portion 412sb of the back side). Therefore, in the non-block-shaped region side portion 412s of the diaper 1B, the area of the back side portion B of the non-block-like region side portion 412s (the area of the back side non-block-like region side portion 412sb) is formed in a plan view. The area of the abdominal side portion A of the non-block-like region side portion 412s (the area of the non-block-shaped region side portion 412sa of the ventral side) is larger than the area of the crotch portion C of the non-block-shaped region side portion 412s (胯裆The area of the non-block region side portion 412sc).

When the absorbent core 41 is used in the disposable diaper 1B, the total length in the longitudinal direction (Y direction) is preferably 250 mm or more and 550 mm or less, and the total width in the lateral direction (X direction) is 50 mm or more and 200 mm. the following.

As the non-block region 412, in the case of the disposable diaper 1B, the length in the longitudinal direction (Y direction) of each of the both end portions in the longitudinal direction (Y direction) (non-block region end portion 412ea, The width of 412eb is 1% or more, preferably 2% or more of the total length of the absorbent core 41 in the Y direction, and is 20% or less, preferably 10% or less, more specifically, It is preferably 1% or more and 20% or less, and more preferably 2% or more and 10% or less. Specifically, the width of the non-block-like region end portions 412ea and 412eb is preferably 5 mm or more and 80 mm or less. The width of the non-block region end portion 412e is measured at the widest position.

As the non-blocky region 412, in the case of being used in the disposable diaper 1B, the length in the lateral direction (X direction) of each of the both sides in the longitudinal direction (Y direction) (the side of the non-blocky region) The width of 412 s is 5% or more, preferably 15% or more, and 35% or less of the total width of the absorbent core 41 in the X direction in the front side portion A (non-block portion side portion 412sa). The length is preferably 25% or less, more specifically, preferably 5% or more and 35% or less, and more preferably 15% or more and 25% or less. Further, the width of the non-block-like region side portion 412s is 5% or more, preferably 15% or more of the total width of the absorbent core 41 in the X direction in the crotch portion C (non-block-like region side portion 412sc). The length is 35% or less, preferably 25% or less, and more specifically, preferably 5% or more and 35% or less, and more preferably 15% or more and 25% or less. Further, the width of the non-block-like region side portion 412s is 5% or more, preferably 15% or more of the total width of the absorbent core 41 in the X direction in the back side portion B (non-block-like region side portion 412sb). The length is 35% or less, preferably 25% or less, and more specifically, preferably 5% or more and 35% or less, and more preferably 15% or more and 25% or less. Specifically, as the length in the lateral direction of each of the both side portions, the width of the non-block-like region side portion 412sa on the ventral side is preferably 10 mm or more and 40 mm or less, and the width of the non-block-like region side portion 412sc is preferably wider. The width of the non-block-shaped side portion 412sb on the back side is preferably 10 mm or more and 40 mm or less, in the range of 10 mm or more and 30 mm or less. The width of the non-block region side portion 412s is the value measured at the widest position.

When used in the disposable diaper 1B of the case, the non-bulk region of the ventral side portion of 412sa area (both sides of the portion of the area of each person) is preferably more than 1000mm ² 6000mm ² or less, the non-bulk region of the crotch The area of the side portion 412sc (the area of each of the both side portions) is preferably 500 mm ² or more and 5000 mm ² or less, and the area of the non-block portion side portion 412sb of the back side (the area of each of the both side portions) is preferably 1000 mm ^{2 .} Above 6000mm ² or less.

The absorbent body 4 provided in the diaper 1B can also be manufactured in the same manner as the absorbent body 4 provided in the diaper 1A.

The effect of the diaper 1B of the second embodiment of the present invention described above will be described.

The diaper 1B of the second embodiment is related to the diaper 1A of the first embodiment. The effect is different. The aspect which is not specifically described is the same as that of the diaper 1A, and the effect of the diaper 1A is suitably applied.

The diaper 1B is as shown in Fig. 9, and the width of the abdominal side portion A of the non-block-like region side portion 412s (the width of the non-block-like region side portion 412sa of the ventral side) is larger than the back side portion B of the non-block-like region side portion 412s. The width (the width of the non-blocky side portion 412sb of the back side). Therefore, the back side of the wearer has a complicated shape as compared with the ventral side, and by making the width of the non-block-like region side portion 412sb of the back side as narrow as possible, it is easy to improve the flexibility along the body type, and Since the width of the non-block-like side portion 412sa on the ventral side is the widest, the flexibility of the entire absorbent body 4 is improved, and the body fluid can be stably held.

Further, as shown in FIG. 9, the diaper 1B is formed such that the widths Wa and Wb of each of the front side portion A and the back side portion B of the block-shaped region 411 are larger than the width Wc of the crotch portion C of the block-shaped region 411. The diffusion of the body fluid can be promoted in the lateral direction (X direction) at a relatively early stage after the body fluid is absorbed, and then the body fluid can be slowly absorbed into the non-blocky region 412. Therefore, it is possible to smoothly perform the movement and diffusion of the body fluid and the retention of the body fluid for the repeated urination.

Further, as shown in Fig. 9, the width Wa of the entire abdominal portion A of the absorbent core 41 of the diaper 1B is larger than the width Wb of the entire back side portion B, and the width Wa1 of the abdominal portion A of the block region 411 is The width Wb1 of the back side portion B of the block region 411 is the same. Therefore, the diffusion of the body fluid can be promoted in the lateral direction (X direction) of each of the abdominal portion A and the back side portion B at a relatively early stage after the body fluid is absorbed, and the efficiency of the absorber can be improved.

In the diaper 1A of the first embodiment described above, it is considered that the crotch portion C is large and the liquid retaining property is improved in the back side portion B in consideration of an infant or the like whose activity is not high. On the other hand, in the diaper 1B of the second embodiment, it is considered that the crotch portion C is small and the ventral portion A and the back side portion B have liquid retention in consideration of the period in which the degree of mobility is slightly higher. Sex. Further, in the diaper 1B, depending on the shape of the wearer from the buttocks to the back, the flat portion of the shape of the ventral side rising from the front portion of the crotch portion is large, and therefore the ventral portion is opposite to the back side portion B. The non-block region side portion 412sa in A has a wider width.

The absorbent article of the present invention is not limited to the disposable diaper 1A of the first embodiment and the disposable diaper 1B of the second embodiment described above, and can be appropriately modified. In addition, each of the components of the diapers 1A to 1B of the above-described first to second embodiments can be appropriately combined without departing from the gist of the present invention.

For example, in the diapers 1A and 1B described above, as shown in FIGS. 2 and 8 , a plurality of block structures 400 are regularly arranged in the longitudinal direction (Y direction) and horizontally from the abdominal side A and the back side B. The block region 411 is formed in the direction (X direction), but may be arranged discontinuously. Further, the absorbent cores 41A and 41B may be provided instead of the absorbent core 41 of the absorbent body 4 provided in the diapers 1A and 1B described above. With respect to the absorbent core bodies 41A and 41B shown in Figs. 10 and 11, the description of the absorbent core 41 provided in the above-described diapers 1A and 1B can be suitably applied to the aspects which have not been specifically described. In addition, in FIGS. 10 and 11, the same members as those in FIG. 4 or 9 are denoted by the same reference numerals.

The absorbent core 41A shown in Fig. 10 is the same as the absorbent core 41 of the diaper 1B except that the shape of the block region 411 is different. In the absorbent core 41A, as shown in Fig. 10, the back-side block-like region 411b is formed in such a manner that the convex portion 43 divided by the longitudinal groove 44Y and the lateral groove 44X is regularly in the lateral direction (X direction). The block structure in which four pieces are arranged is regularly arranged in four rows in the longitudinal direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in a vertical manner. Three columns are arranged in the direction (Y direction). In addition, as shown in FIG. 10, the block-shaped region 411c of the crucible is formed in such a manner that the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction (Y). Configure 3 columns on the direction). Further, as shown in Fig. 10, the block-shaped region 411a on the ventral side is formed such that the convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X are regularly arranged in three in the lateral direction (X direction). The columnar structure is regularly arranged in the vertical direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the vertical direction (Y direction). 4 columns. In the block region 411 of the absorbent core 41A, as shown in FIG. 10, none of the vertical grooves 44Y is linearly disposed from the front side portion A and the back side portion B.

The absorbent core 41B shown in Fig. 11 is the same as the absorbent core 41 of the diaper 1B except that the shape of the block region 411 is different. In the absorptive core body 41B, as shown in Fig. 11, the back side block-like region 411b is formed in such a manner that the convex portion 43 divided by the vertical groove 44Y and the lateral groove 44X is regularly in the lateral direction (X direction). The block structure in which five pieces are arranged is regularly arranged in three rows in the longitudinal direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction. One row is arranged in the direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in three rows in the longitudinal direction (Y direction). Moreover, as shown in FIG. 11, the block-shaped area 411c of the 胯裆 is formed in such a manner that the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction (Y). Configure 3 columns on the direction). Further, as shown in Fig. 11, the ventral block-shaped region 411a is formed by arranging three convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X in the lateral direction (X direction). The block structure is regularly arranged in the vertical direction (Y direction), and the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in the longitudinal direction (Y direction). In one row, the block structure in which the convex portions 43 are regularly arranged in the lateral direction (X direction) is regularly arranged in three rows in the longitudinal direction (Y direction). In the block region 411 of the absorbent core 41B, as shown in FIG. 11, none of the vertical grooves 44Y is linearly arranged from the front side A and the back side B.

In the above-described diapers 1A and 1B, the absorbent core 41 has a concave-convex structure on the non-skin facing surface side as shown in Fig. 3, and the skin facing surface side is flat, but the skin facing surface side is uneven. The structure and non-skin are flat on the opposite side.

Further, in the diapers 1A and 1B described above, as shown in Figs. 2 and 8, the groove portion 44 of the absorbent core 41 constituting the absorbent body 4 is linearly extended in the lateral direction (X direction). The groove 44X and the linear longitudinal groove 44Y extending in the longitudinal direction (Y direction) are formed in a lattice shape as a whole, but are not limited to the lattice shape.

Further, the diapers 1A and 1B described above are unfolded disposable diapers as shown in Figs. 2 and 8, but may be pant-type disposable diapers.

Regarding the above embodiments, the following absorbent articles are further disclosed.

<1> An absorbent article comprising: a front sheet disposed on the opposite side of the skin; a back sheet disposed on the non-skin facing surface side; and an elongated absorbent body disposed between the two sheets The absorbent article has a shape in which a central portion in the longitudinal direction is tapered inwardly, and the absorbent body has an absorbent core comprising an absorbent polymer, and the absorbent core comprises: a block-shaped region comprising a basis weight a plurality of convex portions having a relatively high convex shape and a block structure surrounding the convex portions and having a relatively low base weight portion are regularly arranged in the longitudinal direction and the width direction from the abdominal side portion and the back side portion. And a non-blocky region surrounding the outer periphery of the block region; the convex portion and the groove portion are integrally formed, and in the plan view, the non-block region is longitudinally spaced along the block region The side edge of the direction is in the side portion of the non-block region outside the width direction, and the area of the back side portion or the front side portion of the side portion of the non-block portion is larger than the area of the crotch portion of the side portion of the non-block portion.

<2> The absorbent article according to the above <1>, wherein, in a plan view, an area of each of the back side portion and the front side portion of the side portion of the non-block portion is larger than the non-block shape in the side portion of the non-block portion The area of the crotch on the side of the area.

The absorbent article according to the above <1> or <2>, wherein a width of a front side portion of the side portion of the non-block portion in the side portion of the non-block portion is larger than a back side portion of the side portion of the non-block portion The width.

The absorbent article according to any one of the above aspects, wherein the width of each of the ventral portion and the back side portion of the block-like region in the block-like region is larger than the block-shaped region The width of the crotch.

The absorbent article according to any one of the above aspects, wherein the corner portion of the groove portion surrounding the outermost circumference of the block-like region is curved.

The absorbent article of any one of the above-mentioned <1> to <5> The width of the ventral side portion of the absorbent core in the retractable core is greater than the width of the back side portion of the absorbent core, and the width of the ventral portion of the block-like region in the block-like region is the block shape The back side of the area has the same width.

The absorbent article according to any one of the above aspects, wherein the absorbent body has a covering material that coats the absorbent core, and the absorbent core and the covering material are via an adhesive. Further, in the covering material side of the covering material which is outward in the width direction from the side edge in the longitudinal direction of the absorbent core, the covering material side portions are fixed to each other via the above-mentioned adhesive.

The absorbent article according to any one of the above aspects, wherein the groove portion includes a plurality of longitudinal grooves extending in a longitudinal direction of the absorbent article and a plurality of lateral grooves extending in a lateral direction. One of the plurality of lateral grooves is disposed at the same position as the fold line formed when the absorbent article is folded in the longitudinal direction.

The absorbent article according to any one of the above aspects, wherein the non-skin facing side of the absorbent core is a block-like structure having irregularities, and the skin of the absorbent core is Flat to the side.

The absorbent article according to any one of the above-mentioned items, wherein the left and right side edges of the crotch portion are curved in an arc shape inward in the lateral direction, and have an overall shape. The shape in the center of the longitudinal direction is tapered inward.

The absorbent article according to any one of the above aspects, wherein the size of the front sheet in the lateral direction is smaller than the dimension of the back sheet in the lateral direction.

The absorbent article according to any one of the above aspects, wherein the absorbent core has a total length in the longitudinal direction of 250 mm or more and 550 mm or less, and a total width in the transverse direction of 50 mm or more and 200 mm or less.

The absorbent article of any one of the above-mentioned <1> to <12> wherein the above In the non-block-like region, the length in the longitudinal direction of each of the both end portions in the longitudinal direction is 1% or more and 20% or less of the entire length of the absorbent core in the longitudinal direction, or a length of 2% or more and 10% or less. .

The absorbent article according to any one of the above aspects, wherein the groove portion has a density of 0.05 g/cm ³ or more and 0.15 g/cm ³ or less or 0.07 g/cm ³ or more and 0.13 g/ In the case of cm ³ or less, the density of the convex portion is 0.05 g/cm ³ or more, 0.15 g/cm ³ or less, or 0.07 g/cm ³ or more and 0.13 g/cm ³ or less, and the density of the non-blocky region and the density of the convex portion. same.

The absorbent article according to any one of the above aspects, wherein the absorbent article is an unfolded disposable diaper.

<16> The absorbent article according to the above <15>, wherein a pair of fastening tapes are provided on the left and right side edges of the back side portion, and a fastening tape for fixing the fastening tape is provided on the outer surface of the abdominal side portion. .

<17> The absorbent article according to the above <16>, wherein the side edges of the absorbent core in the longitudinal direction are substantially parallel to each other by the side edges of the most inwardly gathered positions. In the crotch portion of the absorbent core, the region on the side of the adhesive tape on which the interval between the side edges is greater than 1.1 times the interval between the positions at which the two side edges are closest to each other is defined as the back side portion of the absorbent core. The region on the side of the fastening tape in which the interval between the both side edges is larger than 1.1 times the interval is defined as the abdominal side portion of the absorbent core.

<18> The absorbent article according to any one of <1> to <14> wherein the absorbent article is a pant-type disposable diaper.

[Industrial availability]

According to the absorbent article of the present invention, the absorbability of the body fluid in use is improved, the flexibility of the entire absorbent body is improved, and the shape retainability of the absorbent body after the body fluid is absorbed is improved.

1A‧‧‧ diapers

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

6‧‧‧Three-dimensional folds

7‧‧‧Buckle belt

8‧‧‧ buckle belt

43‧‧‧ convex

62‧‧‧Three-dimensional pleat forming sheet

411‧‧‧Blocked area

412‧‧‧Non-blocky area

Claims (8)

An absorbent article comprising: a front sheet disposed on a facing side of the skin; a back sheet disposed on a non-skin facing side; and an elongated absorbent disposed between the two sheets; The absorbent article has a shape in which a central portion in the longitudinal direction is tapered inwardly, and the absorbent body has an absorbent core comprising an absorbent polymer, and the absorbent core comprises: a block-shaped region comprising a relatively heavy basis weight a plurality of convex portions having a high convex shape and a block structure surrounding the convex portions and having a relatively low basis weight, and a plurality of blocks are arranged from the front side portion and the back side portion in a regular manner in the longitudinal direction and the width direction. And a non-blocky region surrounding the outer periphery of the block region; the convex portion and the groove portion are integrally formed, and in the plan view, the non-block region is in a longitudinal direction of the block region The side edge of the side portion of the non-block portion in the outer side in the width direction, the area of the back side portion or the front side portion of the side portion of the non-block portion is larger than the area of the crotch portion of the side portion of the non-block portion, the non-block shape The side of the non-blocky area in the side of the area The width of the side portion is greater than the width of the back side portion of the side portion of the non-block portion, and the width of each of the front side portion and the back side portion of the block portion in the block portion is larger than the width of the block portion The width. An absorbent article comprising: a front sheet disposed on a facing side of the skin; a back sheet disposed on a non-skin facing side; and an elongated absorbent disposed between the two sheets; The absorbent article has a shape in which a central portion in the longitudinal direction is tapered inwardly, and the absorbent body has an absorbent core comprising an absorbent polymer, and the absorbent core comprises: a block-shaped region comprising a relatively heavy basis weight high The plurality of convex portions having a convex shape and a block structure surrounding the groove portions each having a relatively low basis weight are formed from the front side portion and the back side portion, and are regularly arranged in the longitudinal direction and the width direction. And a non-blocky region surrounding the outer periphery of the block region; the convex portion and the groove portion are integrally formed, and in the plan view, the non-block region is closer to the longitudinal direction of the block region In the side portion of the non-block-shaped region outside the width direction, the area of the back side portion or the ventral side portion of the side portion of the non-block-shaped portion is larger than the area of the crotch portion of the side portion of the non-block-shaped portion, the absorbent core The width of the abdominal side portion of the absorbent core is greater than the width of the back side portion of the absorbent core, and the width of the abdominal portion of the block region in the block region and the back side of the block region The width of the portion is the same, and the width of each of the abdominal portion and the back portion of the block region in the block region is larger than the width of the crotch portion of the block region. The absorbent article of claim 1 or 2, wherein the groove portion comprises a plurality of longitudinal grooves extending in a longitudinal direction of the absorbent article and a plurality of lateral grooves extending in a lateral direction, and one of the plurality of transverse grooves The groove is disposed at the same position as the fold line formed when the absorbent article is folded in the longitudinal direction. The absorbent article according to claim 1 or 2, wherein, in a plan view, an area of each of the back side portion and the front side portion of the side portion of the non-block portion is larger than the non-block portion side in the side portion of the non-block portion The area of the Ministry of the Ministry. The absorbent article according to claim 1 or 2, wherein the width of the side portion of the non-block portion is 5% or more and 35% or less of the total width of the absorbent core in the front side portion, and is in the back side 5% or more and 35% or less of the total width of the absorbent core is 5% or more and 35% or less of the total width of the absorbent core in the crotch portion. An absorbent article according to claim 1 or 2, wherein a corner portion of said groove portion surrounding the outermost periphery of said block-like region is curved. The absorbent article according to claim 1 or 2, wherein the absorbent body has a covering material covering the absorbent core, and the absorbent core and the covering material are fixed via an adhesive, and the coated material is compared The side edges of the absorbent core in the longitudinal direction are fixed to the side of the covering material which is outward in the width direction, and the side portions of the covering material are fixed to each other via the above-mentioned adhesive. The absorbent article according to claim 1 or 2, wherein the non-skin opposing side of the absorbent core has a block-like structure having irregularities, and the skin of the absorbent core is flat on the opposite side.