TW201404385A - Absorbent article - Google Patents

Abstract

This diaper (1) is provided with a front sheet (2), a back sheet (3), and an oblong absorber (4) disposed between the two sheets (2, 3), and is provided with a liquid-permeable interlayer sheet (5) disposed between the absorber (4) and the front sheet (2). The absorber (4) has an absorbent core (41). The absorbent core (41) has a block region (411) in which a plurality of block structures (400) comprising convexities (43) of high basis weight and grooves (44) of low basis weight are disposed in the longitudinal direction spanning from a ventral section (A) to a dorsal section (B). The convexities (43) and grooves (44) of the absorbent core (41) are integrally molded, and the interlayer sheet (5) partially covers the block regions of the absorbent core, the interlayer sheet being shorter in the longitudinal direction (Y-direction) than are the block regions (411) of the absorbent core (41). The interlayer sheet (5) is disposed deviated to the ventral section (A) side of the absorbent core (41).

Description

Absorbent article

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

Heretofore, an absorbent article using a block-shaped absorbent body provided with a groove extending in the planar direction has been known (see Patent Documents 1 and 2). In the absorbent body (absorbent core body) included in the absorbent article of the first aspect, the longitudinal embossed concave portion extending from the substantially central portion in the longitudinal direction to the front side portion and the back side portion is spaced apart in the width direction. There are multiple lines configured. When such an absorber (absorbent core) is included, the body fluid is easily diffused by the longitudinal embossing concave portion, and the absorbability of the body fluid during use is improved.

However, since the longitudinal embossed concave portion of the absorbent body (absorbent core) described in Patent Document 1 is formed by embossing, the longitudinal embossed concave portion is made high in density, and the rigidity of the entire absorbent body is changed. high.

On the other hand, the absorption system included in the absorbent article described in Patent Document 2 is formed by arranging a plurality of small absorbing portions that are divided in a plan view on the substrate sheet. Since a plurality of small absorbing portions are disposed on the substrate sheet to form an absorber (absorbent core), the absorbability of the body fluid during use is improved, and the rigidity of the entire absorber is lowered, and the flexibility is improved.

As another technique, the present applicant has previously proposed a disposable diaper in which a liquid permeable second sheet is disposed between a front sheet and an absorbent body (see Patent Document 3).

[Previous Technical Literature] [Patent Literature]

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

Patent Document 2: Japanese Patent Laid-Open Publication No. 2011-136034

Patent Document 3: Japanese Patent Laid-Open Publication No. 2007-159943

However, since the absorption system of the absorbent article described in Patent Document 2 is formed by disposing a plurality of small absorbent portions on the substrate sheet, the strength of the absorbent body (absorbent core) is remarkably lowered, and the body fluid is absorbed after the body fluid is absorbed. Since the shape of the absorber (absorbent core) is damaged, there is room for improvement in shape retention of the absorber after the absorption of the body fluid.

Further, in Patent Document 2, there is no description relating to the second sheet in which the liquid permeability is disposed, and Patent Document 3 does not include any description relating to the block-shaped absorber (absorbent core). In the absorbent article including the block-shaped absorbent body (absorbent core) and the liquid-permeable second sheet, the block-shaped absorbent body (absorbent core) is disclosed in Patent Document 2 and Patent Document 3. There is no relevant record of the proper configuration relationship with the second sheet.

Accordingly, the present invention is directed to an absorbent article comprising an absorbent body that eliminates the disadvantages of the prior art described above.

The present invention relates to 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 vertically long absorbent body disposed between the two sheets. The absorbent body has a ventral side portion on the ventral side of the wearer, a back side portion on the back side, and a crotch portion between the absorbent body and the front sheet including liquid permeability. Intermediate sheet. The above absorbent body has an absorbent core comprising an absorbent polymer. The absorptive core has a block-shaped region in which a plurality of convex portions including a convex shape having a relatively high basis weight and a plurality of convex portions are arranged in the longitudinal direction from the front side portion and the back side portion The block structure of the groove portion having a relatively low basis weight, the convex portion of the absorbent core is integrally formed with the groove portion. The above intermediate sheet covers the above absorption a portion of the block-shaped region of the core, the length of the intermediate sheet in the longitudinal direction is shorter than the length of the block region of the absorbent core in the longitudinal direction, and is biased toward the ventral side of the absorbent core And configuration.

1‧‧‧Disposable diapers

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Intermediate sheet

5h‧‧‧Binder

6‧‧‧Three-dimensional folds

7‧‧‧Buckle belt

8‧‧‧ buckle belt

9, 9X, 9Y, 56, 57, 58, 71‧‧‧ space

41, 41A, 41B, 41C‧‧‧absorbent core

41c, 41ea, 41eb‧‧

42‧‧‧Covered timber

43‧‧‧ convex

44‧‧‧Slots

44X‧‧‧ transverse slot

44Y‧‧‧Longitudinal slot

45‧‧‧Absorbable materials

46‧‧‧ Deposits

46a‧‧‧Materials for difficult-to-breathable components

46b, 46c‧‧‧Regional Correspondence Department

49‧‧‧ Absorbent body forebody

50‧‧‧Rotating cylinder

51‧‧‧Cylinder recess

52‧‧‧ stencil

53‧‧‧Insufficient gas-permeable components

54, 55‧‧‧ stencil area

60‧‧‧ catheter

61‧‧‧Flexible components

62‧‧‧Three-dimensional pleat forming sheet

62h‧‧‧fixed position

63‧‧‧ Leg elastic members

64‧‧‧Low elastic members

65, 84‧‧‧vacuum box

67‧‧‧Exhaust pipe

70‧‧‧Feed roller

75‧‧‧Net belt

80‧‧‧Vacuum conveyor

81‧‧‧ drive roller

82‧‧‧ driven roller

83‧‧‧ breathable belt

90‧‧‧ Pressurizing mechanism

91, 92‧‧‧ Roll

400, 411‧‧‧ block area

411a‧‧‧ ventral lumps

411b‧‧‧Block area on the back side

Blocky area of 411c‧‧‧胯裆

412‧‧‧Non-blocky area

601‧‧ ‧ side end

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧胯裆

CL‧‧‧ center line

The position of the outermost side of Ka‧‧

L1, L2‧‧‧ length

L3, L4, Wa, Wa1, Wb, Wb1, Wc, Wc1‧‧‧ width

L5, L6‧‧‧ interval

R1, R2‧‧‧ arrows

X, Y‧‧ direction

Fig. 1 is a perspective view of a disposable disposable diaper according to an 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.

Figure 4 is a cross-sectional view taken along line II-II of Figure 2.

Fig. 5 is a plan view showing the absorbent core and the intermediate sheet of the disposable diaper shown in Fig. 1 as seen from the side of the front sheet.

Fig. 6 is a schematic view showing an example of an apparatus for manufacturing an absorbent body used in the unfolded diaper according to the embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view showing a portion (recessed portion) on the outer peripheral surface side of the rotary cylinder shown in Fig. 5 in the width direction.

Fig. 8 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. 9 is a plan view showing the other absorbent core and intermediate sheet used in the disposable diaper according to the embodiment of the present invention from the side of the front sheet (Fig. 5 is equivalent).

Fig. 10 is a plan view showing another absorbent core used in the disposable diaper according to the embodiment of the present invention from the side of the front sheet.

Fig. 11 is a plan view showing another absorbent core used in the disposable diaper according to the embodiment of the present invention from the side of the front sheet.

Hereinafter, the absorbent article of the present invention will be described with reference to Figs. 1 to 5 based on preferred embodiments. Figure 1 is a perspective view showing an unfolded type of an embodiment of the present invention. 2 is a perspective view of a partially broken diaper shown in FIG. 1 from the front side of the front sheet, FIG. 3 is a cross-sectional view taken along line II of FIG. 2, and FIG. 4 is a cross-sectional view taken along line II-II of FIG. Figure. Moreover, Fig. 5 is a plan view showing an absorbent core body of the disposable diaper shown in Fig. 1.

As shown in FIG. 1 to FIG. 4, the disposable diaper 1 (hereinafter also referred to as "diaper 1") of the present 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 absorbent body 4 disposed between the two sheets 2 and 3 include a liquid-permeable intermediate sheet 5 between the absorbent body 4 and the front sheet 2. As shown in Fig. 2, the diaper 1 is formed to be bilaterally symmetrical with respect to a center line CL extending in the longitudinal direction.

As shown in Fig. 2, the diaper 1 has a ventral side in which the diaper 1 is divided into three in the longitudinal direction (hereinafter also referred to as "Y direction" and Y direction: parallel to the center line CL) in the unfolded state. Part A, back side B, and crotch portion C between the A and B. 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 1 in the longitudinal direction (Y direction). In addition, the direction orthogonal to the longitudinal direction (Y direction) is described as the lateral direction of the diaper 1 (hereinafter also referred to as "X direction").

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

As shown in Fig. 2, the left and right side edges of the abdominal side portion A of the diaper 1 and the left and right side edges of the back side portion B are more outward in the lateral direction (X direction) than the left and right side edges of the crotch portion C, respectively. Extend. 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 FIGS. 3 and 4, the dimension of the front sheet 2 in the lateral direction (X direction) is smaller than the lateral direction of the back sheet 3. (X direction) size. 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 1 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 opposite side is provided with a buckle 8 for fixing the fastening tapes 7, 7. As shown in FIG. 2, each of the both sides of the diaper 1 in the longitudinal direction (Y direction) is provided with a three-dimensional pleat formation sheet 62 which is elastically fixed in the Y direction in the stretched state, and is fixed to the sheet 62. The side portions of the front sheet 2 form a pair of three-dimensional pleats 6, 6 (see Figs. 1 and 3). Further, as shown in FIG. 2, in each of the both side portions of the diaper 1 in the longitudinal direction (Y direction), 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. Further, at the end portion in the longitudinal direction (Y direction) of the back side portion B side of the diaper 1, the waist elastic member 64 for forming the waist gathers is placed in the X direction in the stretched state, and is formed by the contraction of the waist elastic member 64. Waist folds. The fixing position of the three-dimensional pleat forming sheet 62 and the front sheet 2 will be described in detail below.

As shown in FIGS. 2 to 4, the absorbent body 4 has an absorbent core 41 containing an absorbent polymer, and the diaper 1 also has a covering material 42 covering the absorbent core 41. In the diaper 1, the absorber 4 is formed by coating the liquid-retaining absorbent core 41 which is long in the longitudinal direction (Y direction) with the coating material 42 which is a liquid-permeable hydrophilic sheet. In the diaper 1, as shown in FIG. 3 and FIG. 4, the absorbent core 41 is covered so that the side edges of the covering material 42 overlap each other by folding both side portions of the covering material 42 together. However, it is also possible to use the two separate covering materials including the absorbent core 41.

Generally, the abdominal side portion A, the back side portion B, and the crotch portion C of the absorbent article (for example, a diaper) substantially coincide with the abdominal side portion A, the back side portion B, and the crotch portion C of the absorbent body 4, respectively.

As shown in FIGS. 2 and 5, the absorbent core 41 has a narrowed portion 41c that is tapered inwardly of the crotch portion C. Specifically, as shown in FIGS. 2 and 5, the absorbent core 41 is a ventral portion A. The left and right side edges of the left and right side edges and the back side portion B project outward in the lateral direction (X direction) from the left and right side edges of the crotch portion C, respectively. Further, in the diaper 1, the left and right side edges of the crotch portion C are curved in an arc shape in the lateral direction (X direction), and the crotch portion C as the central portion in the longitudinal direction (Y direction) is inward as a whole. The shape of the square is fine. In the diaper 1, as shown in Fig. 4, the absorbent core 41 has an overall width Wa of the front side portion A larger than the entire width Wb of the back side portion B, and the entire width Wc of the narrowed portion 41c of the crotch portion C is the narrowest. . Further, the widths Wa and Wb are values measured at the widest position, and the width Wc is measured at the narrowest position.

As shown in FIGS. 2 and 5, the absorbent core 41 has a block-like region 411 which includes a plurality of convex portions 43 having a relatively high basis weight and a basis weight surrounding each of the convex portions 43. The block structure 400 of the relatively low groove portion 44 is formed by arranging a plurality of the longitudinal portions (Y direction) from the abdominal side portion A and the back side portion B, and further includes the outer periphery of the diaper 1 and the surrounding block portion 411. Non-blocky region 412. The non-block region 412 has a relatively high basis weight as in the high base weight convex portion 43.

In the diaper 1, as shown in Figs. 2 and 5, the groove portion 44 of the absorbent core 41 includes 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 1, as shown in Figs. 2 and 5, the block-like region 411 of the absorbent core 41 is continuous in the longitudinal direction (Y direction) from the abdominal portion A and the back portion B. The block structure 400 includes a longitudinal groove 44Y extending in the longitudinal direction (Y direction), a lateral groove 44X extending in the lateral direction (X direction), and being disposed in the longitudinal groove 44Y and the lateral groove 44X. A plurality of vertically long base portions 43 having a higher basis weight than the portions of the grooves 44Y and the lateral grooves 44X. Further, in the diaper 1, as shown in Figs. 2 and 4, the vertical groove 44Y constituting the groove portion 44 extends parallel to the longitudinal direction (Y direction), but may extend in the longitudinal direction (Y direction). The curve can also extend obliquely. The lateral grooves 44X constituting the groove portion 44 are also the same.

In the diaper 1, as shown in Figs. 2 and 5, the block-like region 411 of the absorbent core 41 is formed such that the width Wa1 of the abdominal portion 411a of the block region 411 and the width Wb1 of the back side portion 411b are respectively It is larger than the width Wc1 of the crotch portion 411c of the block region 411. Specifically, as shown in FIG. 5, the block-shaped region 411 of the diaper 1 can be roughly divided into a block-shaped region 411a disposed on the ventral side of the ventral side A side of the diaper 1, and a back side portion B disposed on the diaper 1. The block-shaped region 411b on the back side of the side and the block-shaped region 411c disposed between the block-shaped region 411a on the back side and the block-shaped region 411b on the back side are three types. Further, the rectangular-shaped ventral side block-shaped region 411a, the rectangular-shaped block-shaped region 411c, and the rectangular-shaped back-side block-shaped region 411b are traversed from the abdominal side portion A and the back side portion B in the longitudinal direction (Y Direction) is configured continuously. The block-shaped region 411a on the ventral 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. In the diaper 1, the width of the trocar-like block-like region 411a (the width Wa1 of the ventral portion 411a of the block-like region 411) and the width of the back-side block-like region 411b (the width of the back-side portion 411b of the block-like region 411) Wb1) is the same. Further, the width of the block-shaped region 411c (the width Wc1 of the crotch portion 411c of the block region 411) is the narrowest. Further, the widths Wa1 and Wb1 are values measured at the widest position, and the width Wc1 is measured at the narrowest position. In the diaper 1, as described above, as shown in Figs. 2 and 5, the crotch portion C of the absorbent core 41 is tapered inwardly, and further, the block region 411 of the absorbent core 41 is formed. Department C also narrowed down to the inside.

The block region 411 of the absorbent core 41 shown in Fig. 5 will be more specifically described. In the absorbent core 41, as shown in Fig. 5, 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 arranged in the lateral direction (X direction). There are five blocks in which the block structure is regularly arranged in four columns in the longitudinal direction (Y direction). Further, as shown in FIG. 5, the block-shaped region 411c of the crucible is formed in such a manner that the convex portion 43 is regularly arranged in the lateral direction (X direction), and the three block-shaped structures are regularly arranged in the longitudinal direction (Y direction). ) Configure 7 columns. Further, as shown in Fig. 5, the ventral block-shaped region 411a 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) with five formed blocks. The shape is regularly arranged in four columns in the longitudinal direction (Y direction). In the block region 411 of the absorbent core 41, as shown in FIG. 5, four of the six longitudinal grooves 44Y extending in the longitudinal direction (Y direction) are respectively It is arranged linearly from the abdominal side A and the back side B.

In the absorbent article of the present invention, as described above, the liquid permeable intermediate sheet 5 is included between the absorbent body 4 and the topsheet 2. The liquid permeable intermediate sheet 5 is a so-called sub-layer sheet and covers a portion of the bulk region 411 of the absorbent core 41, and the length of the intermediate sheet 5 in the longitudinal direction (Y direction) is shorter than that of the absorbent core. The length of the block region 411 of 41 is the length in the longitudinal direction (Y direction), and is disposed on the side of the abdominal side portion A of the absorbent core 41. Specifically, as shown in FIGS. 2 and 5, the intermediate sheet 5 of the diaper 1 is a rectangular sheet having a long length in the longitudinal direction (Y direction). Further, in the diaper 1, the intermediate sheet 5 is a rectangular sheet, but is not limited to this shape. In the longitudinal direction (Y direction), the intermediate sheet 5 of the diaper 1 extends from the abdominal side portion A to the back side portion B across the narrowed portion 41c of the absorbent core 41 as shown in Figs. 2 and 5 . Further, in the diaper 1, as described above, the crotch portion C constituting the block-like region 411 of the absorbent core 41 is also tapered inward, and the intermediate sheet 5 of the diaper 1 also straddles the block-like region 411. The narrowed portion of the crotch portion C extends from the abdominal side portion A (the ventral side block region 411a) to the back side portion B (the back side block region 411b).

Further, in the longitudinal direction (Y direction), as described above, the block region 411 of the diaper 1 is a block-shaped region 411a on the ventral side, a block-like region 411c on the ridge, and a block-like region 411b on the back side from the ventral portion A. Since the longitudinal direction (Y direction) is continuously arranged across the back side portion B, the length of the intermediate sheet 5 in the longitudinal direction (Y direction) is shorter than the longitudinal direction of the block region 411 of the absorbent core 41. The length of the (Y direction) means the length of the intermediate sheet 5 shorter than the total longitudinal direction (Y direction) of the block-shaped region 411a on the ventral side, the block-shaped region 411c in the ridge, and the block-shaped region 411b on the back side. Further, as shown in FIGS. 2 and 5, the intermediate sheet 5 is biased toward the ventral side A side of the absorbent core 41, that is, the ventral side A of the block-like region 411 of the absorbent core 41 (ventral side) The block region 411a) is disposed on the side and covers a portion of the block region 411. In other words, as shown in FIG. 5, the block-like region 411 of the absorbent core 41 extends outward in the longitudinal direction (Y direction) from the intermediate sheet 5 at the back side portion B, and the back side portion B of the block-shaped region 411 ( One of the block-shaped regions 411b) on the back side is partially exposed. Furthermore, in the diaper 1, as shown in Fig. 5, the ventral side of the block region 411 A portion of the portion A (the ventral portion 411a) is also exposed, and the exposed area of the back side portion B (the back side block portion 411b) formed as the block portion 411 is larger than the ventral portion A of the block portion 411 ( The exposed area of the ventral portion 411a).

In the diaper 1, as shown in FIG. 5, each of the corner portions of the rear end portion of the absorbent core 41 has a narrowed portion 41ea, 41eb which protrudes inward toward the inner side in the longitudinal direction (Y direction). In the longitudinal direction (Y direction), as shown in FIG. 5, the abdominal side portion 411a of the block-shaped region 411 passes over the widest position Wa in the abdominal side portion A of the absorbent core 41 and the position on the outermost side Ka And extended to the outside side. Further, in the diaper 1, as shown in Fig. 5, the intermediate sheet 5 extends to the vicinity of the above position Ka. By arranging the intermediate sheet 5 at the above position, the effect of suppressing the shape of the abdominal portion 411a of the block-like region 411 where the excrement is concentrated is suppressed.

Further, in the lateral direction (X direction), as shown in Figs. 2 and 5, the intermediate sheet 5 of the diaper 1 passes over the block region 411 and reaches the longitudinal direction (Y direction) of the absorbent core 41. Non-blocky regions 412 of each of the sides. Specifically, the intermediate sheet 5 of the diaper 1 is formed to be shorter in the lateral direction (X direction) than in the lateral direction (X direction) of the absorbent core 41, and the intermediate sheet 5 is in the longitudinal direction (Y direction). The side edges are located on the non-blocky regions 412 of the absorbent core 41. In the diaper 1, as shown in FIG. 2 and FIG. 5, the side edges of the intermediate sheet 5 along the longitudinal direction (Y direction) thereof are in the ventral side portion A, the crotch portion C, and the back side portion B, Each of the block-shaped region 411a on the ventral side, the block-shaped region 411c on the ridge, and the block-shaped region 411b on the back side are respectively located on the non-blocky region 412 of the absorbent core 41. Thus, in the diaper 1, at the crotch portion C, the side edge of the intermediate sheet 5 in the longitudinal direction (Y direction) is also located on the non-block portion 412, but it is also possible at the crotch portion C, the intermediate sheet. The side edge of the longitudinal direction (Y direction) of 5 extends beyond the non-blocky region 412, and the side edges of the intermediate sheet 5 in the longitudinal direction (Y direction) are located at the side of the front side portion A and the back side portion B. On the block area 412. Since the intermediate sheet 5 is disposed at the above position, the rigidity of the bulk region 411 in the width direction is made uniform, and therefore, it is effective in that it is easily bent uniformly when compressed in the width direction, and the wearer is suppressed. Damage to the shape of the blocky region 411 caused by the movement of the legs.

When the absorbent core 41 is used in the disposable diaper 1, 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 total width in the lateral direction (X direction) of the abdominal portion A of the absorbent core 41 is 50 mm or more, preferably 70 mm or more, and 200 mm or less, preferably 150 mm or less, and more specifically, preferably 50 mm. The above 200 mm or less is further preferably 70 mm or more and 150 mm or less.

The total width in the lateral direction (X direction) of the back side portion B of the absorbent core 41 is 50 mm or more, preferably 70 mm or more, and 200 mm or less, preferably 150 mm or less, and more specifically, preferably 50 mm. The above 200 mm or less is further preferably 70 mm or more and 150 mm or less.

The total width of the crotch portion C of the absorbent core 41 in the lateral direction (X direction) is 25 mm or more, preferably 40 mm or more, and 115 mm or less, preferably 85 mm or less, and more specifically, preferably 25 mm. The above is 115 mm or less, and more preferably 40 mm or more and 85 mm or less.

Further, the total length is measured at the position of the longest position, and the total width is measured at the widest position of the ventral portion A and the back side portion B, and is measured at the narrowest position of the crotch portion C. .

When the block region 411 is used in the disposable diaper 1, 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. Further, it is 98% or less, preferably 95% or less, more specifically, preferably 70% or more and 98% or less, and more preferably 85% or more and 95% or less.

When the block region 411 is used in the disposable diaper 1, 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. Further, it is 90% or less, preferably 70% or less, more specifically, preferably 30% or more and 90% or less, and more preferably 50% or more and 70% or less.

When the abdominal side portion 411a of the block region 411 is used in the disposable diaper 1, the length in the lateral direction (X direction) is 30% of the total width of the X side of the abdominal side portion A of the absorbent core 41. The above is preferably 50% or more, and is 90% or less, preferably 70% or less, more specifically 30% or more and 90% or less, and more preferably 50% or more. 70% or less in length.

When the abdominal portion 411a of the block region 411 is used in the disposable diaper 1, the length in the longitudinal direction (Y direction) is 30 mm or more, preferably 50 mm or more, and 150 mm or less, preferably 120 mm or less. More specifically, it is preferably 30 mm or more and 150 mm or less, more preferably 50 mm or more and 120 mm or less, and the length in the lateral direction (X direction) is 40 mm or more, preferably 50 mm or more, and 180 mm or less. It is 130 mm or less, and more specifically, it is preferably 40 mm or more and 180 mm or less, and more preferably 50 mm or more and 130 mm or less.

When the back side portion 411b of the block region 411 is used in the disposable diaper 1, the length in the lateral direction (X direction) is 30% of the total width of the back side portion B of the absorbent core 41 in the X direction. The above is preferably 50% or more, and is 90% or less, preferably 70% or less, more specifically 30% or more and 90% or less, and more preferably 50% or more. 70% or less in length.

When the back side portion 411b of the block region 411 is used in the disposable diaper 1, the length in the longitudinal direction (Y direction) is 50 mm or more, preferably 70 mm or more, and 200 mm or less, preferably 150 mm or less. More specifically, it is preferably 50 mm or more and 200 mm or less, more preferably 70 mm or more and 150 mm or less, and the length in the lateral direction (X direction) is 40 mm or more, preferably 50 mm or more, and 180 mm or less. It is 130 mm or less, and more specifically, it is preferably 40 mm or more and 180 mm or less, and more preferably 50 mm or more and 130 mm or less.

When the crotch portion 411c of the block region 411 is used in the disposable diaper 1, the length in the longitudinal direction (Y direction) is 100 mm or more, preferably 150 mm or more, and 240. Mm or less is preferably 220 mm or less, more specifically, 100 mm or more and 240 mm or less, further preferably 150 mm or more and 220 mm or less, and the length in the lateral direction (X direction) is 20 mm or more, preferably 30 mm or more. Further, it is 100 mm or less, preferably 70 mm or less, and more specifically 20 mm or more and 100 mm or less, and more preferably 30 mm or more and 70 mm or less.

Further, the length in the longitudinal direction (Y direction) is the value measured at the longest position, and the length in the lateral direction (X direction) is measured at the position where the front side portion A and the back side portion B are at the longest position. The c-section is the value measured at the shortest position.

When the non-block portion 412 is used in the disposable diaper 1, the length in the longitudinal direction (Y direction) of each of the both end portions in the longitudinal direction (Y direction) is preferably the Y of the absorbent core 41. The length of the entire length is 2% or more and 10% or less. Specifically, the length in the longitudinal direction (Y direction) is preferably 5 mm or more and 40 mm or less. Further, the length in the longitudinal direction (Y direction) is a value measured at the widest position.

When the non-block portion 412 is used in the disposable diaper 1, the length in the lateral direction (X direction) of each of the both sides in the longitudinal direction (Y direction) is preferably absorbed in the ventral portion A. The length of the total width in the X direction of the abdominal side portion A of the core body 41 is 5% or more and 30% or less, and the crotch portion C is preferably the total width of the crotch portion C of the absorbent core 41 in the X direction. The length of 5% or more and 30% or less is preferably 5% or more and 30% or less of the total width of the back side portion B of the absorbent core 41 in the X direction. Specifically, the length of the non-block portion 412 in the lateral direction (X direction) of the front side portion A is preferably 10 mm or more and 40 mm or less, and the length in the lateral direction (X direction) of the back side portion B is preferably The length of 10 mm or more and 40 mm or less is preferably 10 mm or more and 30 mm or less in the lateral direction (X direction) of the crotch portion C. Further, the length of the lateral direction (X direction) of each of the abdominal portion A and the back portion B is the value measured at the widest position, and the length of the lateral portion (X direction) of the crotch portion C is The value measured at the narrowest position.

When the intermediate sheet 5 is used in the disposable diaper 1, its longitudinal direction (Y direction) The length is 20% or more, preferably 30% or more of the total length of the absorbent core 41 in the Y direction, and is 80% or less, preferably 70% or less, and more specifically, preferably 20 The length is more than 80% or less, and more preferably 30% or more and 70% or less. Further, the length in the longitudinal direction (Y direction) is 30% or more, preferably 40% or more of the total length of the block region 411 in the Y direction, and is 85% or less, preferably 75% or less. More specifically, it is preferably 30% or more and 85% or less, and more preferably 40% or more and 75% or less.

Further, when the intermediate sheet 5 is used in the disposable diaper 1, the length in the lateral direction (X direction) is 30% or more, preferably 40% or more of the total length of the absorbent core 41 in the X direction. The length is 90% or less, preferably 80% or less, and more specifically, preferably 30% or more and 90% or less, and more preferably 40% or more and 80% or less. Further, the length in the lateral direction (X direction) is 100% or more, preferably 105% or more of the entire length of the block region 411 in the X direction, and is 150% or less, preferably 130% or less. More specifically, it is preferably 100% or more and 150% or less, and more preferably 105% or more and 130% or less.

When the intermediate sheet 5 is used in the disposable diaper 1, the length in the longitudinal direction (Y direction) is 120 mm or more, preferably 150 mm or more, and is 400 mm or less, preferably 300 mm or less. More specifically, it is preferably 120 mm or more and 400 mm or less, more preferably 150 mm or more and 300 mm or less, and the length in the lateral direction (X direction) is 45 mm or more, preferably 55 mm or more, and is 115 mm or less. The length is preferably 85 mm or less, more specifically 45 mm or more and 115 mm or less, and more preferably 55 mm or more and 85 mm or less. Further, the length in the longitudinal direction (Y direction) is the value measured at the longest position, and the length in the lateral direction (X direction) is also the value measured at the widest position.

The intermediate sheet 5 is disposed to be biased toward the ventral side A side of the absorbent core 41, and in the case of being used in the disposable diaper 1, the ventral side A side of the longitudinal direction (Y direction) of the intermediate sheet 5 It The distance L5 between the end edge and the edge of the abdominal side A side of the longitudinal direction (Y direction) of the absorbent core 41 is narrower than the edge of the back side B side of the longitudinal direction (Y direction) of the intermediate sheet 5 The interval L6 between the edge edges on the side of the back side portion B in the longitudinal direction (Y direction) of the absorbent core 41. In the case of use in the disposable diaper 1, the interval L5 is 10 mm or more, preferably 25 mm or more, and is 70 mm or less, preferably 50 mm or less, and more specifically, preferably 10 mm or more and 70 mm. Hereinafter, it is preferably 25 mm or more and 50 mm or less, and the interval L6 is 50 mm or more, preferably 70 mm or more, and is 140 mm or less, preferably 120 mm or less, and more specifically, preferably 50 mm or more and 140 mm or less. Further, it is preferably 70 mm or more and 120 mm or less.

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 more detail.

In the diaper 1, 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 1, when the convex portion 43 is viewed in plan, it is formed in a rectangular shape, 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 1, when the absorbent article is used in, for example, a disposable diaper, as shown in Fig. 5, the length L1 in the longitudinal direction (Y direction) is 5 mm or more, preferably 15 mm or more. Further, it is 30 mm or less, preferably 25 mm or less, more specifically 5 mm or more and 30 mm or less, and further 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 is 20 mm or less, preferably 15 mm or less, and more specifically 3 mm or more and 20 mm or less. Further, it is preferably 5 mm or more and 15 mm or less. Further, the lengths L1 and L2 are values measured at the widest position.

In the groove portion 44 of the diaper 1, when the absorbent article is used in, for example, a disposable diaper, as shown in Fig. 5, the width L3 of the linear lateral groove 44X extending in the lateral direction (X direction) is 0.5 mm. More preferably, the length is 1 mm or more, and is 5 mm or less, preferably 3 mm. The length below is more preferably 0.5 mm or more and 5 mm or less, and still 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 is 5 mm or less, preferably 3 mm or less, 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 positions of the bottoms of the concave portions in the uneven structure of the absorbent body 4.

The lateral groove 44X and the vertical groove 44Y are formed at the same depth, 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 is 4.5 mm or less, preferably 4 mm or less, more specifically It is preferably 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 4 mm or less. The thickness of the convex portion 43 is 2 mm or more, preferably 3 mm or more, and is 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. the following. 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, pressurize the measurement portion at 5 kPa for 10 minutes, and perform weight removal. The measurement was carried out immediately afterwards.

The measurement site is set to include one or more of the ventral portion A, the crotch portion C, and the back side portion B for each of the three pieces, and the average of the two diaper samples (the measurement portion is six or more). Get the thickness. For example, the diaper 1 is cut along 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. When it is difficult to measure by the naked eye, for example, a cross section of the cut sample can be observed and measured at a magnification of 20 to 100 times using a microscope (VHX-1000 manufactured by Keyence Corporation).

Improves softness when the absorbent article is used in, for example, a disposable diaper From the viewpoint of absorbability, the basis weight of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is preferably 20% or more, preferably 30% or more, and 80% or less of the basis weight of the convex portion 43. It is preferably 70% or less, and more specifically, it is preferably 20% or more and 80% or less, and more preferably 30% or more and 70% or less.

Specifically, the basis weight of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is preferably 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 preferably 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, more specifically It is preferably 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 and the longitudinal groove 44Y). Ten 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 the average weight of one small piece of the convex portion 43 was obtained. . 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.

Next, FEATHER is used along the boundary line extending in the longitudinal direction (Y direction) between the convex portion 43 and the groove portion 44 (longitudinal groove 44Y) in a width of 100 mm and a width of the groove portion 44 (longitudinal groove 44Y). The single-edged razor manufactured by the company is cut into five small pieces of a thin strip-shaped groove portion 44 (longitudinal groove 44Y). For the 5 small pieces obtained, use the electronic balance separately (Electronic balance GR-300 manufactured by A & D Co., Ltd., accuracy: 4 digits after the decimal point) was measured, and the average weight of one small piece of the groove portion 44 (longitudinal groove 44Y) was obtained. 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). The groove portion 44 (the lateral groove 44X) also calculates the basis weight in the same manner as the groove portion 44 (longitudinal groove 44Y).

In the absorbent body 4 of the diaper 1, the convex portion 43 and the non-block portion 412 are formed to have substantially the same density or high density as 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 preferably 50 of the density of the convex portion 43 from the viewpoint of enhancing the liquid diffusibility. % 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 density of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is preferably 0.05 g/cm ³ or more, preferably 0.07 g/cm ³ or more, and 0.15 g/cm ³ or less. It is 0.13 g/cm ³ or less, and 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 density of the convex portion 43 is preferably 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 In particular, 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 FIGS. 3 and 4, the convex portion 43 of the absorbent core 41 is integrally formed with the groove portion 44 (the lateral groove 44X and the longitudinal groove 44Y), and the non-block portion 412 is also combined with the convex portion 43 and The groove portion 44 (the lateral groove 44X and the vertical groove 44Y) is integrally formed. Here, the "formation is one" system The finger convex portion 43, the groove portion 44 (the lateral groove 44X, the vertical groove 44Y), and the non-block portion 412 are not integrated with each other without being joined by a bonding means such as an adhesive or heat fusion, and are integrally formed of the same material. As described above, 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, and the continuity of the body fluid can be smoothly moved. A method of manufacturing such an absorbent 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 The convex portion protruding toward the back sheet 3 in the block structure 400 of 41 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" includes, for example, a case where the convex portion 43 near the boundary between the groove portion 44 and the convex portion 43 forms a part of the concave portion. Similarly, the "protrusion portion is mainly composed of the convex portion 43". The non-block region 412 is formed to include, for example, a portion in which the groove portion 44 near the boundary between the convex portion 43 and the groove portion 44 forms a portion of the convex portion.

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

Further, in the diaper 1, as shown in Figs. 3 and 4, 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, in the absorber 4, 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. As described above, in the diaper 1, as shown in Figs. 3 and 4, 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 1, as shown in FIGS. 2 and 5, the lateral groove 44X and the covering material 42 which are recessed toward the front sheet 2 side are formed. The plurality of spaces 9X formed are continuously extended in the lateral direction (X direction) corresponding to the lateral grooves 44X, and the plurality of spaces 9Y formed by the vertical grooves 44Y recessed toward the front sheet 2 side and the covering material 42 correspond to the longitudinal grooves. 44Y and continuously extend in the longitudinal direction (Y direction).

In the diaper 1, the absorbent core 41 and the covering material 42 covering the absorbent core 41 are fixed by an adhesive to form the absorbent body 4. Further, the covering member 42 and the intermediate sheet 5 are fixed by the adhesive 5h. Further, the absorbent body 4 is fixed to the front sheet 2 by an adhesive agent via the intermediate sheet 5 fixed by the adhesive 5h, and is fixed to the back sheet 3 via an adhesive. In particular, in the diaper 1, as shown in Figs. 3 and 5, the covering member 42 of the fixed absorbent body 4 and the adhesive 5h of the intermediate sheet 5 are formed to extend in the longitudinal direction (Y direction) to form a convex portion of the block-like region 411. The portion 43 is applied in a line shape in the longitudinal direction (Y direction) and intermittently applied in the lateral direction (X direction) of the diaper 1. In this manner, the adhesive agent 5h is not disposed on the longitudinal groove 44Y of the absorbent core 41 in the lateral direction (X direction) when viewed in cross section as shown in FIG. 3, and as shown in FIG. The group of the convex portions 43 formed by the plurality of convex portions 43 arranged intermittently in the direction (Y direction) is applied in a line shape so as to traverse the convex portions 43 in the longitudinal direction (Y direction). Further, the adhesive 5h is applied to a group of the respective convex portions 43 which are intermittently arranged in the lateral direction (X direction) as viewed in a cross section as shown in FIG. Further, the adhesive 5h of the diaper 1 is on the crotch portion C of the absorbent core 41, as shown in Figs. 3 and 5, on the non-block portion 412 located on both sides in the longitudinal direction (Y direction). It is also applied in a straight line. By applying the adhesive 5h at the above position, the intermediate sheet 5 is less likely to float in the longitudinal direction (Y direction) when the diaper is worn, and the shape retainability of the absorbent body after absorbing the body fluid can be improved.

In the diaper 1, the adhesive agent 5h is applied intermittently in the lateral direction (X direction) by using, for example, a coater, and is applied in a line shape in the longitudinal direction (Y direction), and is striped in a whole manner. Ground coating. The coating width of each adhesive agent 5h is preferably 0.5 mm or more and 5 mm or less. Preferably, the basis weight of the coating agent for 5 hours is 0.1 g/m ² or more, preferably 0.2 g/m ² or more, and 15 g/m ² or less, preferably 10 g/m ² or less, more specifically In particular, it is preferably 0.1 g/m ² or more and 15 g/m ² or less, and more preferably 0.2 g/m ² or more and 10 g/m ² or less.

As described above, as shown in FIGS. 1 to 3, the diaper 1 has a pair of three-dimensional pleats 6, 6 on both sides in the longitudinal direction (Y direction). In the back side portion B, the fixing position 62h of the three-dimensional gather forming sheet 62 and the front sheet 2 forming the three-dimensional gathers 6 is further outward in the longitudinal direction (Y direction) than the intermediate sheet 5 as shown in FIG. Further, as shown in FIG. 2, it is located on the non-block-like region 412 of each of the both sides of the absorbent core 41 in the longitudinal direction (Y direction). As shown in FIG. 4, the fixing position 62h is not located at a fixed position of the three-dimensional gather forming sheet 62 and the front sheet 2 located outside the width direction (X direction) of the absorbent body 4, but at least a part is provided in the absorbent core. The fixed position of the end portion on the side of the back side portion B in the longitudinal direction (Y direction) of the body 41. In the longitudinal direction (Y direction), the elastic position of the three-dimensional pleat-forming sheet 62 and the front sheet 2 is disposed on the absorbent core 41 in which the intermediate sheet 5 is not present, and the elasticity is utilized. The contraction of the member 61 and the leg elastic member 63 causes the absorbent core 41 which extends outward in the longitudinal direction (Y direction) compared to the intermediate sheet 5 to be easily bent in the longitudinal direction (Y direction) when the diaper is worn, and In the lateral direction (X direction), the above-mentioned fixing position 62h is disposed on the non-block portion 412 of each of the both side portions of the absorbent core 41, and it is easy to extend along the outer absorbent core. The lateral groove 44X of the block-shaped region 411 of 41 forms a ridge, thereby preventing leakage of soft stools and the like.

Next, the absorbent body 4 included in the diaper 1, that is, the convex portion 43 (high density), the non-block portion 412 (high density), and the groove portion 44 (low density) (the lateral groove 44X, the longitudinal groove 44Y) are formed. A method of manufacturing the absorber 4 which is an integral absorbent core 41 will be described.

Fig. 6 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 absorbent polymer 45 containing the absorbent polymer as a raw material of the absorbent core 41 to the rotary cylinder 50. The outer peripheral surface; the transfer roller 70 disposed obliquely below the downstream side of the rotary cylinder 50 and rotationally driven in the direction of the arrow R2; the vacuum box 65 disposed in the circumferential direction of the rotary cylinder 50 and the material Between the rollers 70; a mesh belt 75 as a gas permeable member, which passes between the vacuum box 65 and the rotating cylinder 50 and is conveyed The roller 70 is disposed between the rotating drum 50 and the vacuum conveyor 80 disposed below the conveying roller 70.

As shown in Fig. 6, the rotary cylinder 50 is formed in a cylindrical shape and receives power from a prime mover such as a motor so that a member forming an outer peripheral surface thereof rotates about a 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 the inside of the space 56 can be maintained at a negative pressure by the operation of the exhaust device. On the other hand, in the spaces 57 and 58 on the inner side (rotational axis side) of the rotary cylinder 50, a pipe (not shown) for air outside the suction device is connected.

As shown in Fig. 6, on the outer peripheral surface of the rotary cylinder 50, a plurality of cylindrical recesses 51 having shapes corresponding to the shape of the absorbent core 41 to be manufactured are formed at equal intervals in the R1 direction. As shown in Fig. 7, a bottom plate portion of each of the cylindrical recesses 51 is provided with a mesh plate 52 in which a plurality of micropores are formed, and a gas-impermeable member 53 made of metal or resin. Here, the gas-impermeable member 53 is provided so as to protrude from the mesh plate 52, and is disposed to correspond to the shape and position of the groove portion 44 (the lateral groove 44X and the vertical groove 44Y). As shown in Fig. 6, the region 54 including only the mesh plate 52 partitioned by the gas-impermeable member 53 disposed as above is a portion corresponding to the convex portion 43, and only the portion partitioned by the gas-impermeable member 53 is included. The area 55 of the stencil 52 in the area becomes a portion corresponding to the non-block area 412. Moreover, the outer peripheral surface of the rotating cylinder 50 in which the cylindrical recessed part 51 is not formed has the frame of the rotating cylinder 50 containing the metal rigid body, and it is non-gas permeability.

As shown in Fig. 6, one end side of the duct 60 covers the outer peripheral surface of the rotary cylinder 50 in the space 56 maintained in the negative pressure, and has a fiber material introduction means on the other end side (not shown). The fiber material introduction device includes, for example, a pulverizer that pulverizes the sheet-like wood pulp as a woven pulp, and feeds the woven pulp (fiber material) into the catheter, and includes introduction in the middle of the catheter 60. The absorbent polymer introduction portion of the absorbent polymer.

The transfer roller 70 includes a cylindrical outer peripheral portion having a gas permeability and is driven by a prime mover such as a motor so that its outer peripheral portion rotates in the R2 direction. Within the feed roller 70 A non-rotating portion of the side (rotating shaft side) is formed with a space 71 for decompressing the inside. A well-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 in the direction of 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 into 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 adjacent to the outermost portion of the transfer cylinder 70 closest to the rotary cylinder 50, and is surrounded by the outer circumference of the rotary cylinder 50. The surface is separated and transferred to the transfer roller 70.

The vacuum conveyor 80 includes an annular gas permeable belt 83 that is stretched over 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 with the gas permeable belt 83 interposed therebetween. .

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 airflow in the space 56 is negatively generated in this manner, and the airflow that transports the absorbent material 45 to the outer peripheral surface of the rotary 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 actuated to supply the woven pulp (fiber material) and the absorbent polymer into the catheter 60. The absorbent material 45 becomes a scattering state along with the airflow flowing in the duct 60, and is supplied. To the outer circumference of the rotating 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. 8, 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 obtained in this manner, the amount of the absorbent material 45 deposited on 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 the like. The deposition amount of the absorbent material 45 in the portion (region 54 corresponding portion) 46b and the portion (region 55 corresponding portion) 46c is relatively increased, and the deposit 46 as a whole includes a block structure having irregularities.

When the rotating cylinder 50 rotates and the cylindrical recess 51 reaches the opposite position of the vacuum box 65, the deposit 46 in the cylindrical recess 51 is sucked onto the mesh belt 75 by suction from the vacuum box 65. 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, On the other hand, the film is released from the cylinder 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 vacuum conveyor 80 in a state of being adsorbed on the mesh belt 75 on the transfer roller 70. The delivery portion (the lowermost end portion of the transfer roller 70) is transferred to the vacuum conveyor 80 by the suction of the vacuum box 84 at the delivery portion.

In the manufacturing apparatus of the absorbent body of the present embodiment, as shown in FIG. 6, the covering material 42 including the toilet paper or the hydrophilic non-woven fabric is introduced onto the vacuum conveyor 80 before the deposit 46 is placed, and the deposit 46 is placed. Transfer to the covering material 42. Further, the covering material 42 is folded by a folding plate (not shown), and the deposit 46 is covered with the covering material 42, and the deposit 46 in a state covered with the covering material 42 is cut at a predetermined interval, and is continuously continuous. An absorbent body precursor 49 cut into a size of one absorbent body is produced.

Further, in the apparatus for manufacturing an absorbent body according to the present embodiment, the absorbent body precursor 49 obtained by compressing in this manner is compressed by the pressurizing mechanism 90, thereby constituting the absorbent core precursor 49. The thickness of the deposit 46 is actively reduced to obtain the target absorbent body 4 (absorbent core 41). 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. And compressing 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 absorber 4 (absorbent core 41) manufactured by the above-described manufacturing apparatus, the portion (region 54 corresponding portion) 46b (convex portion) and the portion (region 55 corresponding portion) 46c of the deposit 46 become absorbed. The convex portion 43 and the non-block portion 412 having a relatively high density in the core body 41, and the portion (the corresponding portion of the gas-impermeable member 53) 46a (recessed portion) of the deposit 46 become a relatively low density in the absorbent core 41. The groove portion 44 (the lateral groove 44X and the vertical groove 44Y).

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

The front sheet 2, the back sheet 3, and the three-dimensional pleat forming sheet 62 are usually 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 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 laminated sheets can be used.

The adhesive tape 7 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, "Magic Tape (registered trademark)" (manufactured by Kuraray Co., Ltd.), "Quicklon (registered trademark)" (manufactured by YKK), "Magi Cloth (registered trademark)" (manufactured by Kanebo Bell Touch), etc., can be used. Hook-and-face components, etc.

The absorbent core 41 constituting the absorbent body 4 can be obtained by holding particles of the absorbent polymer in an aggregate of fibers such as pulp fibers. As the constituting the absorbent body 4 As the covering material 42, a hydrophilic sheet, for example, a coated sheet material including a water permeable tissue (toilet paper) or a water permeable non-woven fabric can be used.

As the elastic member 61 for forming the three-dimensional pleats, the leg elastic member 63, and the waist elastic member 64, natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene may be used. A filamentous stretchable material such as a polybutadiene copolymer or a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene.

The adhesive 5h 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. An adhesive for fixing the absorbent core 41 and the covering member 42, an adhesive for fixing the absorbent body 4 and the front sheet 2 or the back sheet 3, and a sheet 62 for fixing the three-dimensional gathers and a front sheet The adhesive of material 2 is also the same.

The intermediate sheet 5 (the secondary layer sheet) 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 sheet mainly composed of hydrophilic fibers can be used. A sheet having a hydrophilic fiber content of 90% by mass or more is preferable. Examples of the sheet include paper, nonwoven fabric, and net. As the sheet of paper, dry pulp can be used. As the non-woven sheet, a spunlace nonwoven fabric, a spunbonded nonwoven fabric, a hot air non-woven fabric, a resin bonded non-woven fabric, and a paper non-woven fabric can be used. In terms of liquid permeability, a hot air non-woven fabric is preferred.

The basis weight of the intermediate sheet 5 is preferably 15 g/m ² or more and 100 g/m ² or less.

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

As shown in FIGS. 2 and 3, the diaper 1 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 wear along The shape of the body, so that the service is improved. Further, by flowing the body fluid after urination in the groove portion 44, the diffusibility is improved, and the absorbability of the absorbent core 41 is improved. As described above, since the diaper 1 includes the absorbent core 41 having the block-like region 411, the absorbability of the body fluid during use is improved, and the flexibility of the entire absorbent body is improved.

Further, as shown in FIGS. 2 and 5, the intermediate sheet 5 of the diaper 1 has a length in the longitudinal direction (Y direction) shorter than the longitudinal direction (Y direction) of the block region 411 of the absorbent core 41, It is disposed on the side of the abdominal side A of the absorbent core 41. By arranging the intermediate sheet 5 so as to be easily deformed by the movement or posture of the wearer, the strength of the absorbent body after swelling of the body fluid can be increased, and the shape retainability can be improved. Further, by disposing the intermediate sheet 5, it is easy to diffuse the body fluid and uniformly absorb the absorbent body 4, so that the boundary between the dry region and the wet region of the absorbent body 4 which is likely to cause cracking is less likely to occur, and the shape retainability is improved.

Further, as shown in FIGS. 2 and 5, since the diaper 1 has a non-blocky region 412 surrounding the outer periphery of the block-shaped region 411, the body fluid can be slowly absorbed, and after repeated urination, the absorbent core 41 can be lifted. Absorbent, and leakage of body fluid from the self-absorbent core 41 can be prevented.

Further, as shown in FIGS. 2 and 5, the intermediate sheet 5 of the diaper 1 extends in the longitudinal direction (Y direction) from the abdominal portion A to the back side portion B across the narrowed portion 41c of the absorbent core 41. Further, in the diaper 1, the intermediate sheet 5 extends from the abdominal side portion A (the ventral side block portion 411a) to the back side portion B (the back side block) across the narrowed portion of the crotch portion C of the block-like region 411. Shaped area 411b). Therefore, it is possible to improve the ease of damage of the absorbent body 4 in the movable range of the wearer's leg when worn, and to improve the shape retention.

Further, as shown in Figs. 2 and 5, the intermediate sheet 5 of the diaper 1 passes over the block-like region 411 in the lateral direction (X direction) to reach the longitudinal direction (Y direction) of the absorbent core 41. The non-blocky region 412 of each of the side portions, the side edge of the intermediate sheet 5 in the longitudinal direction (Y direction) is located on the non-blocky region 412 of the absorbent core 41. Therefore, since the rigidity of the width direction (X direction) of the crotch portion C of the absorbent core 41 is easily made uniform, the diaper is worn when worn. 1 When it is compressed in the lateral direction (X direction), it becomes easy to bend uniformly.

The absorbent article of the present invention is not limited to any of the disposable diapers 1 of the above-described embodiment, and can be appropriately changed.

For example, in the diaper 1, as shown in FIGS. 2 and 5, a plurality of block-like structures 400 are continuously arranged in the longitudinal direction (Y direction) from the abdominal side A and the back side B to form a block-like region 411. However, it may be configured discontinuously. Similarly, the block-shaped region 411a on the ventral side, the block-shaped region 411c on the ridge side, and the block-shaped region 411b on the back side may be arranged discontinuously.

In the diaper 1, as shown in FIG. 3 and FIG. 4, the non-skin opposing surface side of the absorbent core 41 has a concavo-convex structure, and the skin facing surface side is flat, but the skin facing surface side may be uneven. The structure is flat on the opposite side of the skin.

Further, in the diaper 1, as shown in Figs. 2 and 5, the corner portions of the rear end portions of the absorbent core 41 in the longitudinal direction (Y direction) have the tapered portions 41ea and 41eb, but they may not There are thin portions 41ea and 41eb.

Further, in the diaper 1, as shown in Figs. 2 and 5, the groove portion 44 of the absorbent core 41 constituting the absorbent body 4 is formed by a linear lateral groove 44X extending in the lateral direction (X direction). The linear vertical groove 44Y extending in the longitudinal direction (Y direction) is formed in a lattice shape as a whole, but is not limited to the lattice shape.

Further, in the diaper 1 described above, as shown in FIGS. 2 and 5, the absorbent core 41 and the block-like region 411 each have a narrowed portion at the crotch portion C, but they may not have a flat portion, and may be any The person has a collection department. Further, the absorbent cores 41A to 41C shown in Figs. 9 to 11 may be included in place of the absorbent core 41 of the absorbent body 4. The absorbent cores 41A to 41C shown in Figs. 9 to 11 will be described in detail with respect to the absorbent core 41 included in the diaper 1 as described above. In addition, in FIGS. 9 to 11, the same members as those in FIG. 5 are denoted by the same reference numerals.

For example, as shown in FIG. 9, the absorptive core body 41A has the narrow part 41c, but the block-shaped area 411 does not have the thickness part, and is formed only in the rectangular shape which is long in the longitudinal direction (Y direction). Pair of figures The block-shaped region 411 of the absorptive core 41A shown in Fig. 9 is more specifically described, and the block-like region 411 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 ( In the X direction, five pieces of the block structure are arranged, and 14 rows are regularly arranged in the longitudinal direction (Y direction) from the abdominal side A and the back side B. In the block region 411 of the absorbent core 41A shown in Fig. 9, six longitudinal grooves 44Y extending in the longitudinal direction (Y direction) are arranged linearly from the abdominal side A and the back side B, respectively.

The block region 411 of the absorbent core 41B shown in Fig. 10 will be more specifically described. In the absorptive core 41B, as shown in FIG. 10, the back-side block-shaped 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 arranged in the lateral direction (X direction). Four columns are arranged in a regular manner in the vertical direction (Y direction). Further, as shown in FIG. 10, the block-shaped region 411c of the crucible is formed in such a manner that the convex portion 43 is regularly arranged in the lateral direction (X direction), and the three block-shaped structures are regularly arranged in the longitudinal direction (Y direction). ) Configure 7 columns. Further, as shown in Fig. 10, the ventral block-shaped region 411a 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) with four formed blocks. The shape is regularly arranged in four columns in the longitudinal direction (Y direction). In the block-like region 411 of the absorbent core 41B, as shown in FIG. 10, any of the low basis weight portions 44Y extending in the longitudinal direction (Y direction) is not disposed from the abdominal side portion A and the back side portion B. Straight.

The block region 411 of the absorbent core 41C shown in Fig. 11 will be more specifically described. In the absorptive core 41C, as shown in FIG. 11, the back-side block-shaped 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 arranged in the lateral direction (X direction). In the vertical direction (Y direction), three columns are regularly arranged in three rows, and the convex portions 43 are regularly arranged in the lateral direction (X direction). Four block structures are regularly arranged in the longitudinal direction (Y Direction) Configure 1 column. Further, as shown in Fig. 11, the block-shaped region 411c of the crucible is formed such that the convex portions 43 defined by the vertical grooves 44Y and the lateral grooves 44X are regularly arranged in the horizontal direction (X direction) with three blocks formed. The columnar structure is regularly arranged in seven columns in the longitudinal direction (Y direction). Further, as shown in Fig. 11, the ventral block-shaped region 411a is formed in the following manner: by the longitudinal groove The convex portion 43 defined by the 44Y and the lateral groove 44X is regularly arranged in the horizontal direction (X direction) in a block-like structure. One row is arranged in the vertical direction (Y direction), and the convex portion 43 is regularly arranged in the lateral direction. In the (X direction), five columns are arranged in a regular manner, and three columns are arranged in the vertical direction (Y direction). In the block region 411 of the absorbent core 41C, as shown in FIG. 11, any of the longitudinal grooves 44Y extending in the longitudinal direction (Y direction) is not linearly arranged from the abdominal side A and the back side B. .

Further, as shown in Fig. 2, the diaper 1 is an unfolded disposable diaper, but may be a pant-type disposable diaper.

Regarding the above embodiment, the following absorbent article is further disclosed.

<1> An absorbent article comprising: a topsheet disposed on the opposite side of the skin; a backsheet disposed on the non-skin facing side; and a vertically long absorbent body disposed between the two sheets. The absorbent body has a ventral side portion on the ventral side of the wearer, a back side portion on the back side, and a crotch portion between the absorbent body and the front sheet including the middle of liquid permeability. a sheet, wherein the absorbent body has an absorbent core comprising an absorbent polymer, the absorbent core having a block-like region comprising a plurality of convex portions having a relatively high basis weight and surrounding each of the plurality of convex portions The block structure of the groove portion having a relatively low basis weight of the convex portion is formed by arranging a plurality of longitudinally extending portions from the front side portion and the back side portion, and the convex portion of the absorbent core body is formed integrally with the groove portion The intermediate sheet covers one of the block regions of the absorbent core, and the length of the intermediate sheet in the longitudinal direction is shorter than the length of the block region of the absorbent core in the longitudinal direction, and is biased toward Arranged on the ventral side of the absorbent core.

<2> The absorbent article according to the above <1>, wherein the absorbent core has a narrowed portion that is tapered inwardly of the crotch portion, and the intermediate sheet spans the absorbent core in the longitudinal direction. The thin portion extends from the abdominal side portion to the back side portion.

The absorbent article according to the above <1>, wherein the absorbent core has a non-blocky region surrounding the outer periphery of the block region, and the intermediate sheet passes over the block region in the lateral direction. And reaching a non-blocky region located on each of the two sides of the absorbent core in the longitudinal direction.

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 covering material and the intermediate sheet are made of an adhesive. In the above-described adhesive, the adhesive is applied in a straight line in the longitudinal direction so as to form the convex portion of the block-like region in the longitudinal direction, and is applied intermittently in the lateral direction of the absorbent article.

The absorbent article according to any one of the above aspects, wherein the absorbent article has a pair of three-dimensional pleats on both sides in the longitudinal direction, and each of the three-dimensional pleats is formed on the back side portion. The three-dimensional pleat-forming sheet and the front sheet are fixed to each other in the longitudinal direction, and are non-blocks located on both sides of the absorbent core in the longitudinal direction. On the area.

<6> The absorbent article according to the above <4>, wherein the absorbent core is coated so as to fold both side portions of the covering material so that the side edges of the covering material overlap each other.

The absorbent article according to any one of the above aspects, wherein the absorbent core has a narrowed portion which is tapered inwardly of the crotch portion, and the ventral portion of the absorbent core system The left and right side edges of the left and right side edges and the back side portions respectively protrude outward in the lateral direction from the left and right side edges of the crotch portion, and the overall width of the abdominal side portion is larger than the overall width of the back side portion. The entire width of the portion of the portion of the absorbent article is the narrowest, and the left and right sides of the absorbent article are curved in an arc shape inward in the lateral direction, and the entire portion of the portion in the longitudinal direction is inwardly formed. The shape of the collection.

The absorbent article according to any one of the above aspects, wherein the groove portion of the absorbent core includes a longitudinal groove extending in the longitudinal direction and a transverse direction extending in the lateral direction. The block structure, the block structure of the block region of the absorbent core includes the longitudinal groove extending in the longitudinal direction, the lateral groove extending in the lateral direction, and the portion disposed by the longitudinal groove and the lateral groove The above convex portion.

The absorbent article according to the above <8>, wherein the longitudinal groove constituting the groove portion extends parallel to the longitudinal direction or a curve extending in the longitudinal direction or obliquely extends to constitute the transverse groove of the groove portion. It extends parallel to the lateral direction, or a curve extending in the lateral direction, or extends obliquely.

The absorbent article of any one of the above-mentioned <1> to <9> wherein one of the back side portion and one of the ventral portion of the block-like region are also exposed and formed as the back of the block-shaped region The exposed area of the side portion is larger than the exposed area of the ventral side portion of the block-shaped region.

The absorbent article according to any one of the above aspects, wherein the absorbent core has a tapered portion that protrudes inward from the corner portion of each of the front end portions in the longitudinal direction. .

The absorbent article according to any one of the above aspects, wherein the length of the block-shaped region in the longitudinal direction is 70% or more and 98% or less of the total length of the absorbent core in the longitudinal direction. Length, or length of 85% or more and 95% or less.

The absorbent article according to any one of the above aspects, wherein the length of the block-shaped region in the lateral direction is 30% or more and 90% or less of the total width of the absorbent core in the lateral direction. The length, or the length of 50% or more and 70% or less.

The absorbent article according to any one of the above aspects, wherein the length of the ventral side portion of the block-like region in the lateral direction is the total of the lateral direction of the abdominal portion of the absorbent core. The length is 30% or more and 90% or less, or 50% or more and 70% or less.

The absorbent article according to any one of the above aspects, wherein the length of the back side portion of the block-like region in the lateral direction is the total of the lateral direction of the back side portion of the absorbent core. The length is 30% or more and 90% or less, or 50% or more and 70% or less.

<16> The absorbent article according to any one of the above-mentioned <1> to <15> wherein The length of the intermediate sheet in the longitudinal direction is 20% or more and 80% or less of the entire length of the absorbent core in the longitudinal direction, or a length of 30% or more and 70% or less.

The absorbent article according to any one of the above aspects, wherein the length of the intermediate sheet in the longitudinal direction is 30% or more and 85% or less of the entire length of the block-shaped region in the longitudinal direction. , or 40% or more and 75% or less in length.

The absorbent article according to any one of the above aspects, wherein the length of the intermediate sheet in the transverse direction is 30% or more and 90% or less of the total length of the absorbent core in the lateral direction. Length, or 40% or more and 80% or less.

The absorbent article according to any one of the above aspects, wherein the length of the intermediate sheet in the lateral direction is a length of 100% or more and 150% or less of the entire length of the block-shaped region in the lateral direction. Or a length of 105% or more and 130% or less.

<20> The absorbent article according to the above <8>, wherein the lateral groove of the groove portion is formed at the same depth as the vertical groove, and the thickness of the groove portion is 30% or more and 90% or less of the thickness of the convex portion.

The absorbent article according to any one of the above aspects, wherein the basis weight of the groove portion is 20% or more and 80% or less, or 30% or more and 70% or less of the basis weight of the convex portion. .

The absorbent article according to any one of the above aspects, wherein the convex portion and the non-block portion are formed to have a higher density than the groove portion.

The absorbent article according to any one of the above aspects, wherein the density of the groove portion is 50% or more and 100% or less, or 75% or more and 95% or less of the density of the convex portion.

The absorbent article according to any one of the above aspects, wherein the convex portion of the absorbent core is integrally formed with the groove portion, and the non-block portion and the convex portion are The groove portion is formed integrally.

<25> The absorbent article according to any one of the above <1> to <24> wherein The groove portion of the absorbent core is biased toward the front sheet side in the thickness direction of the absorbent article, and the absorbent core system has the block structure having irregularities on the non-skin opposing surface side of the absorbent core The skin of the absorbent core is flat on the opposite side.

<26> The absorbent article according to the above <4>, wherein a space is formed between the groove portion of the absorbent core and the covering material.

The absorbent article according to any one of the above aspects, wherein the groove portion is formed in a lattice shape on the side of the back sheet of the absorbent core as a whole, and is disposed at a position of the lattice eye. The convex portion is formed, and the groove portion is formed to surround the convex portion.

The absorbent article according to the above <26>, wherein the plurality of spaces formed by the lateral grooves recessed toward the front sheet side and the covering material correspond to the lateral grooves, respectively, in the lateral direction The plurality of spaces formed by the vertical grooves recessed toward the front sheet side and the covering material are continuously extended in the longitudinal direction corresponding to the vertical grooves.

The absorbent article according to any one of the above aspects, wherein the absorbent core system constituting the absorbent body is formed by holding particles of the absorbent polymer in an aggregate of fibers such as pulp fibers. The above-mentioned covering material constituting the absorbent body is a hydrophilic sheet, a water-containing tissue (toilet paper) or a water-permeable nonwoven fabric.

The absorbent article according to any one of the above aspects, wherein the absorbent article comprises the elastic member for forming the three-dimensional gathers, the leg elastic member, and the waist elastic member, and the three-dimensional gathers are formed. The elastic member, the leg elastic member and the waist elastic member are made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, A filamentous stretchable material of an ethyl acrylate-ethylene polyethylene-α-olefin copolymer.

The absorbent article according to any one of the above aspects, wherein the adhesive material for fixing the above-mentioned covering material and the intermediate sheet is used for fixing the absorbent core and the covering material. a subsequent agent for fixing the above-mentioned absorber and the above-mentioned front sheet or the above-mentioned back The adhesive for the sheet material and the adhesive for fixing the sheet for forming the three-dimensional pleats and the sheet for the front sheet may be a hot-melt adhesive, and the hot-melt adhesive is used.

Styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene copolymer (SEBS) An iso-block copolymer is a hot melt adhesive.

The absorbent article according to any one of the above aspects, wherein the intermediate sheet is a sheet mainly composed of a hydrophilic fiber, and the sheet mainly composed of the hydrophilic fiber is used. Paper sheet, non-woven fabric, net, the paper sheet is made of dry pulp, which is a spunlace nonwoven fabric, a spunbonded nonwoven fabric, a hot air non-woven fabric, a resin bonded non-woven fabric, and a paper non-woven fabric.

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

The absorbent article according to any one of the above aspects, 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 during 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.

1‧‧‧Disposable diapers

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Intermediate sheet

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 (5)

An absorbent article comprising: a topsheet disposed on a facing side of the skin; a backsheet disposed on the non-skin facing side; and an elongated absorbent disposed between the two sheets, the absorbent Having a ventral side portion on the ventral side of the wearer, a back side portion on the back side, and a weir portion between the absorbent body and the front sheet comprising a liquid permeable intermediate sheet; The absorbent body has an absorbent core comprising an absorbent polymer, and the absorbent core has a block-like region in which a plurality of base weights are arranged in the longitudinal direction from the abdominal side portion and the back side portion. a plurality of convex portions having a high convex shape and a block structure surrounding a groove portion having a relatively low basis weight of each of the convex portions, wherein the convex portion of the absorbent core is integrally formed with the groove portion, and the intermediate sheet is formed Covering a portion of the block-like region of the absorbent core, the length of the intermediate sheet in the longitudinal direction is shorter than the length of the block region of the absorbent core in the longitudinal direction, and is biased toward the absorbent core Arranged on the ventral side. The absorbent article according to claim 1, wherein the absorbent core has a narrowed portion which is narrowed inwardly of the crotch portion, and the intermediate sheet spans the above-mentioned thin portion of the absorbent core in a longitudinal direction from the abdomen The sides extend to the back side. The absorbent article according to claim 1 or 2, wherein the absorbent core has a non-blocky region surrounding the outer periphery of the block region, and the intermediate sheet is transverse to the block region in the lateral direction, and the arrival is located at the above A non-blocky region of each of the two sides of the absorbent core in the longitudinal direction. The absorbent article according to claim 1 or 2, wherein the absorbent body has a covering material covering the absorbent core, and the covering material and the intermediate sheet are fixed by an adhesive agent, the adhesive agent being longitudinally oriented Spreading in a longitudinal direction in a manner of forming the convex portion constituting the block-shaped region, and the absorbent article It is applied intermittently in the lateral direction. The absorbent article according to claim 1 or 2, wherein the absorbent article has a pair of three-dimensional pleats on both sides in the longitudinal direction, and the three-dimensional pleat-forming sheet for forming the three-dimensional pleats and the front surface are formed on the back side portion. The fixed position of the sheet is further outward in the longitudinal direction than the intermediate sheet, and is located on a non-block-like region of each of the both sides of the absorbent core in the longitudinal direction.