JP6099239B2 - Absorbent articles - Google Patents

Description

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

  DESCRIPTION OF RELATED ART Conventionally, the absorbent article using the block-shaped absorber (absorbent core) provided with the groove-shaped space extended in the plane direction is known (refer patent document 1). In the absorbent article described in Patent Document 1, the absorbent body includes a first region having a high polymer absorber content ratio and a low hydrophilic fiber content ratio, and a polymer absorber content ratio from the first region. Is provided with a second region with a low content ratio of the fibrous material and a space penetrating from the second region provided on the outer sheet side to the first region provided on the inner sheet side Has a body (absorbent core). Since the absorptive article given in patent documents 1 has such an absorber, gel blocking may be prevented effectively.

  As an alternative technique, the present applicant has previously said that the absorber (absorbent core) is formed by arranging a plurality of small absorbent parts separated in plan view on the substrate sheet. A property article was proposed (see Patent Document 2). Patent Document 2 describes that the interval between the small absorption portions adjacent in the vertical direction is different from the interval between the small absorption portions adjacent in the horizontal direction.

JP 2009-119154 A JP 2011-136034 A

  However, Patent Document 1 does not describe any relationship between the width of the space extending in the vertical direction and the width of the space extending in the horizontal direction, and the absorbent article described in Patent Document 1 has an absorption capacity of the absorber. Could not be used effectively.

  Moreover, since the absorber (absorbent core) of the absorbent article described in Patent Document 2 is not formed integrally with the substrate sheet and the plurality of small absorbent parts, the body fluid is smoothed out. The absorbent article described in Patent Document 2 has room for improvement in the effective use of the absorption capacity of the absorber.

  Therefore, the subject of this invention is providing the absorbent article which can diffuse a bodily fluid efficiently in the wide range of an absorber, and can utilize an absorption capacity | capacitance efficiently.

  The present invention is an absorbent article comprising a top sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorbent disposed between the two sheets. The absorbent body has an absorbent core containing an absorbent polymer, and the absorbent core includes longitudinal grooves extending in the longitudinal direction of the absorbent article, transverse grooves extending in the lateral direction of the absorbent article, and the longitudinal grooves. And a block-shaped region composed of a plurality of vertically long high basis weight portions having a basis weight higher than that of each of the longitudinal grooves and the transverse grooves at the portion partitioned by the transverse grooves, and the longitudinal grooves and the transverse grooves Is to provide an absorbent article having the same thickness or a thinner lateral groove, and the width of the lateral groove is wider than that of the longitudinal groove in plan view.

  According to the absorbent article of the present invention, body fluid can be efficiently diffused over a wide range of the absorber, and the absorption capacity of the wide range of the absorber can be efficiently utilized.

FIG. 1 is a perspective view of an unfolded 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 viewed from the top sheet side. 3 is a cross-sectional view taken along the line II of FIG. FIG. 4 is a perspective view of the top sheet having the disposable diaper shown in FIG. 1. FIG. 5 is a plan view of the absorbent core of the disposable diaper shown in FIG. 1 as viewed from the back sheet side. 6 is a partially enlarged plan view of the absorbent core shown in FIG. FIG. 7 is a schematic view showing an example of an absorbent body manufacturing apparatus used for the deployable disposable diaper according to the embodiment of the present invention. FIG. 8 is a schematic cross-sectional view along the width direction of a part (concave portion) on the outer peripheral surface side of the rotating drum shown in FIG. FIG. 9 is a schematic cross-sectional view showing a state where an absorbent material is deposited in the concave portion of the rotating drum shown in FIG. FIG. 10 is an explanatory diagram for explaining the spread of body fluid to the absorbent core when the wearer excretes during wearing of the disposable diaper shown in FIG. 1. FIG. 11 is a perspective view of a top sheet used for a disposable diaper according to another embodiment of the present invention. FIG. 12: is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side. FIG. 13: is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side. FIG. 14: is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side. FIG. 15: is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side.

  Hereinafter, the absorbent article of this invention is demonstrated based on the preferable embodiment, referring FIGS. 1-6. FIG. 1 shows a perspective view of an unfolded disposable diaper according to an embodiment of the present invention, and FIG. 2 shows a partially broken plan view of the disposable diaper shown in FIG. 3 is a cross-sectional view taken along the line II of FIG. 4 is a perspective view of the top sheet having the disposable diaper shown in FIG. 1, and FIG. 5 is a plan view of the absorbent core having the disposable diaper shown in FIG. 6 shows a partially enlarged plan view of the absorbent core shown in FIG.

  The disposable diaper 1 (hereinafter also referred to as “diaper 1”) of the present embodiment, as shown in FIGS. 1 and 2, is arranged on the surface sheet 2 disposed on the skin facing surface side and on the non-skin facing surface side. And the vertically long absorbent body 4 arranged between the two sheets 2 and 3. As shown in FIG. 2, the diaper 1 is formed symmetrically with respect to a center line CL extending in the vertical direction.

The diaper 1 of the present embodiment will be described in detail. As shown in FIG. 2, the diaper 1 is in a vertical direction (hereinafter also referred to as “Y direction”. Y direction: a direction parallel to the center line CL). It has an abdominal side A, a back side B, and a crotch C positioned between these A and B. The abdomen A is a part located on the wearer's abdomen when the diaper is worn, the dorsal part B is a part located on the wearer's back, and the crotch C is located on the inseam of the wearer. It is a part to do. The crotch part C is located in the central part of the diaper 1 in the vertical direction (Y direction). In addition, the direction orthogonal to the vertical direction (Y direction) will be described as the horizontal direction of the diaper 1 (hereinafter also referred to as “X direction”).
In the present specification, the “skin facing surface” is a surface disposed on the skin side of the wearer when worn, out of the front and back surfaces of each member such as the surface sheet 2 constituting the diaper 1. The “surface” is a surface that is directed to the side opposite to the skin side of the wearer when wearing, out of the front and back surfaces of each member such as the surface sheet 2.

  As shown in FIG. 2, the diaper 1 extends laterally (X direction) outward from the left and right side edges of the crotch C at the left and right side edges of the ventral side A and the back side part B, respectively. ing. The left and right side edges of the crotch part C are curved in an arc shape inward in the lateral direction (X direction), and the central part in the longitudinal direction (Y direction) is constricted inward as a whole. Yes. The top sheet 2 and the back sheet 3 respectively extend outward from the left and right side edges and the front and rear end edges of the absorber 4. As shown in FIG. 3, the surface sheet 2 has a lateral dimension (X direction) that is smaller than a lateral dimension (X direction) of the back sheet 3. Each of the top sheet 2 and the back sheet 3 is joined to each other directly or through another member at the extended portion extending outward from the periphery of the absorbent body 4, and sandwiches and fixes the absorbent body 4. doing. The adhesive 5 for fixing the absorber 4 will be described in detail later.

  The diaper 1 is a so-called unfolded diaper as shown in FIGS. 1 and 2, and a pair of fastening tapes 7, 7 are provided on the left and right edges of the back side B, and the outer surface of the abdomen A On the (non-skin facing surface), a landing tape 8 for fastening the fastening tapes 7 is provided. As shown in FIG. 2, a three-dimensional gather forming sheet 62 having elastic members 61 fixed in an expanded state in the Y direction is provided on both side portions along the longitudinal direction (Y direction) of the diaper 1. A pair of three-dimensional gathers 6 and 6 (see FIGS. 1 and 3) are formed by being arranged and fixed on the side portions. Further, as shown in FIG. 2, a plurality of leg elastic members 63 for forming leg gathers are arranged in an extended state in the Y direction on both side portions along the longitudinal direction (Y direction) of the diaper 1. Leg gathers are formed by the contraction of the leg elastic members 63. Moreover, the waist part elastic member 64 for waist gather formation is distribute | arranged to the X direction at the longitudinal direction (Y direction) edge part by the side of the back side B of the diaper 1, and the waist part elastic member 64 of A waist gather is formed by contraction.

  As shown in FIGS. 2 to 4, the surface sheet 2 has a large number of convex portions 21 convex on the skin facing surface side and concave portions 22 adjacent to the convex portions 21, as shown in FIGS. The skin facing surface side has an uneven structure, and the non-skin facing surface side of the topsheet 2 is flat. As shown in FIG. 4, the top sheet 2 of the diaper 1 includes a first layer 23 and a second layer 24 that are sheet-like materials. The first layer 23 constitutes the skin facing surface of the topsheet 2, and the second layer 24 constitutes the non-skin facing surface of the topsheet 2. As shown in FIG. 4, the first layer 23 forms a large number of convex portions 21 that protrude toward the skin facing surface side and are hollow inside, and have concave portions 22 formed between the convex portions 21. Further, the second layer 24 is planar. In the recess 22, the first layer 23 and the second layer 24 are joined via the joint portion 25. The concave portion 22 has a joint portion 25 and a non-joint portion at the outer peripheral edge of the joint portion 25.

  In the surface sheet 2 of the diaper 1, the convex part 21 is enclosed by the recessed part 22 which has the junction part 25 of 4 points | pieces, as shown in FIG. The convex portion 21 is a flat rectangular parallelepiped or truncated quadrangular pyramid with rounded ridgelines as a whole. On the other hand, the recess 22 is also rectangular in plan view. In addition, in the surface sheet 2 of the diaper 1, although the convex part 21 is surrounded by the junction part 25 (concave part 22) of four points, even if it is enclosed by the junction part 25 (concave part 22) more than four points. Good.

  In the surface sheet 2 of the diaper 1, the convex part 21 and the concave part 22 form the row | line | column arrange | positioned alternately along the Y direction, as shown in FIG. Has been placed. When attention is paid to any one convex portion 21 in one row, the convex portion 21 is located at a position adjacent to the one convex portion 21 in the left and right rows adjacent to the row in the X direction. Absent. Specifically, in two rows adjacent in the X direction, the joint portions 25 (concave portions 22) are arranged so as to be shifted by a half pitch in the Y direction. Therefore, when paying attention to any one joint portion 25 (concave portion 22) in one row, the one joint portion 25 (concave portion 22) is formed by being surrounded by the convex portion 21 at the front and rear and the left and right. It is a closed recess. That is, when the topsheet 2 is viewed in plan from the first layer 23 side, the joint portions 25 (concave portions 22) are arranged in a staggered pattern, and the convex portions 21 are also arranged in a staggered pattern.

From the viewpoint of reducing the contact pressure with the body and improving the wearing feeling, the height 21 (see FIG. 4) of the convex portion 21 is 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 4 mm or less, more specifically 0.5 mm or more and 5 mm or less, more preferably 1 mm or more and 4 mm or less. Further, the bottom dimension L1 (see FIG. 4) of the convex portion 21 along the Y direction is 2 mm or more and 30 mm or less, preferably 5 mm or less, more specifically 2 mm or more and 30 mm or less, and preferably 2 mm. More preferably, it is 5 mm or less. Further, the bottom dimension L2 (see FIG. 4) along the X direction is 2 mm or more and 30 mm or less, preferably 5 mm or less, more specifically 2 mm or more and 30 mm or less, and preferably 2 mm or more and 5 mm or less. More preferably it is. Further, the bottom area of the convex portion 21 is 4 mm ² or more and 900 mm ² or less, preferably 25 mm ² or less, more specifically 4 mm ² or more and 900 mm ² or less, more preferably 4 mm ² or more and 25 mm ² or less. It is preferable that

  The length L3 (see FIG. 4) of the joint portion 25 of the concave portion 22 is 0.1 mm or more, preferably 0.5 mm or more, and 20 mm or less, preferably 5 mm or less, more specifically 0. It is preferable that the thickness is 1 mm or more and 20 mm or less, particularly 0.5 mm or more and 5 mm or less from the viewpoint that the touch is good and the cushion feeling is high. The length in the Y direction of the joint portion 25 is the same as the length L3.

  The first layer 23 and the second layer 24 are made of the same or different sheet-like materials. This sheet-like material is substantially non-stretchable. As the material of the sheet, any material that is used in conventionally known diapers and is substantially non-stretchable can be used without particular limitation. For example, various nonwoven fabrics such as a nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a spunlace nonwoven fabric, and a needle punched nonwoven fabric manufactured by the card method can be used. Moreover, the film etc. which enabled liquid permeation | transmission by the opening means can also be used. When a nonwoven fabric is used as the sheet material, the fineness of the constituent fibers is 1 dtex or more, preferably 1.5 dtex or more, and 20 dtex or less, preferably 5.6 dtex or less, more specifically 1 dtex or more and 20 dtex or less. It is preferable from 1.5 dtex or more and 5.6 dtex or less from points, such as ensuring the intensity | strength of the surface sheet 2, and the improvement of the touch.

The basis weight of the first layer 23 is 10 g / m ² or more, preferably 15 g / m ² or more, and 100 g / m ² or less, preferably 30 g / m ² or less, more specifically 10 g / m ² or more. It is preferably 100 g / m ² or less, more preferably 15 g / m ² or more and 30 g / m ² or less. On the other hand, the basis weight of the second layer 24 is 5 g / m ² or more, preferably 10 g / m ² or more, and 50 g / m ² or less, preferably 30 g / m ² or less, more specifically 5 g / m. preferably ² or more 50 g / m ² or less, and more preferably not more than 10 g / m ² or more 30 g / m ^2. The total basis weight of the surface sheet 2 including the first layer 23 and the second layer 24 is 15 g / m ² or more, preferably 20 g / m ² or more, and 150 g / m ² or less, preferably 60 g / m ^2. More specifically, it is preferably 15 g / m ² or more and 150 g / m ² or less, and more preferably 20 g / m ² or more and 60 g / m ² or less.

  A suitable method for manufacturing the top sheet 2 having the above structure is described in Japanese Patent Application Laid-Open No. 2004-174234 and Japanese Patent Application Laid-Open No. 2005-111908 related to the earlier application of the present applicant.

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

  2 and 5, the absorbent core 41 is partitioned by a vertical groove 44Y extending in the vertical direction (Y direction), a horizontal groove 44X extending in the horizontal direction (X direction), a vertical groove 44Y, and a horizontal groove 44X. And a block-shaped region 411 composed of a plurality of vertically long high basis weight portions 43 having a basis weight higher than that of each of the grooves 44Y and the horizontal grooves 44X. In the following description, the longitudinal grooves 44Y and the lateral grooves 44X are portions where the absorbent core 41 located in the portion is relatively lower in weight than the high basis weight portion 43. Each part is also collectively referred to as “low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y)”. If it explains in full detail about an absorptive core, in the diaper 1, as shown in FIG. 3, the absorptive core 41 has a high basic weight part 43 with a comparatively high basic weight, and convex to the back sheet 3 side, and a high basic weight. It has the low basic weight part 44 (the horizontal groove 44X, the vertical groove 44Y) which adjoined the part 43 and was relatively low in the basic weight, and was dented in the surface sheet 2 side. As for the absorptive core 41, the high basic weight part 43 and the low basic weight part 44 (horizontal groove 44X, vertical groove 44Y) are integrally molded. As shown in FIG. 3, the absorbent core 41 of the diaper 1 is a raised portion (high basis weight portion 43) that protrudes from the surface sheet 2 side toward the back sheet 3 side on the non-skin facing surface side of the absorbent core 41. And the hollow part (low basic weight part 44 (the horizontal groove 44X, the vertical groove 44Y)) hollow toward the surface sheet 2 side from the back surface sheet 3 side is formed. And the skin opposing surface side of the absorptive core 41 is flat. Hereinafter, the absorbent core will be described in more detail.

  As shown in FIGS. 2 and 5, the low basis weight portion 44 of the absorbent core 41 in the diaper 1 is a portion located in a plurality of linear (continuous linear) horizontal grooves 44 </ b> X extending in the horizontal direction (X direction). , And a portion located in a plurality of linear (continuous linear) vertical grooves 44Y extending in the vertical direction (Y direction). The block-shaped region 411 of the absorbent core 41 provided in the diaper 1 is a lattice as a whole by linear linear grooves 44X extending in the horizontal direction (X direction) and linear vertical grooves 44Y extending in the vertical direction (Y direction). A high basis weight portion 43 that is long in the vertical direction (Y direction) is arranged in each of the portions (lattice positions) defined by these linear horizontal grooves 44X and vertical grooves 44Y. Has been.

As shown in FIG. 2, FIG. 3 and FIG. 5, the absorbent core 41 has a high plow disposed in a section defined by a horizontal groove 44X and a vertical groove 44Y arranged in a lattice shape, and a horizontal groove 44X and a vertical groove 44Y. The diaper 1 further has a non-block region 412 arranged over the outer periphery of the block-shaped region 411. The absorbent core 41, as shown in FIG. 5 is the same as the total width W _B total width W _A of the front section A is in the rear section B, the width of the block-shaped region 411 in the front section A W _A1 is the same as the width W _B1 of the block-shaped region 411 in the back side portion B. That is, as shown in FIGS. 2 and 5, the block-shaped region 411 is formed in a rectangular shape that is long in the vertical direction (Y direction), and the width W _A1 and the back side of the ventral portion A of the block-shaped region 411. The width B _{B1 of the} part B is the same. Unblocked regions 412 disposed over the outer periphery of the block-shaped region 411, FIG. 2, as shown in FIG. 5, as the total width W _A and the total width W _B are the same, ventral Both side edges in A and both side edges in the back side B extend in the same length outwardly in the lateral direction (X direction) from both side edges in the crotch C, and as a whole in the longitudinal direction (Y direction) center part A portion closer to the ventral side A is formed in a shape constricted inward, and the entire area of the dorsal side B is larger than the entire area of the ventral side A. As in the high basis weight portion 41, the non-blocking region 412 has more absorbent material than the low basis weight portion 44.

  More specifically, the block-shaped region 411 of the absorbent core 41 will be described in detail. In the diaper 1, as shown in FIG. 5, the high basis weight portion 43 partitioned by the horizontal groove 44X and the vertical groove 44Y is regularly arranged in the horizontal direction. Four block structures arranged in the direction (X direction) are regularly arranged from the abdominal side A to the back side B in 14 rows in the vertical direction (Y direction). In the block shape region 411 of the diaper 1, as shown in FIG. 5, six vertical grooves 44Y extending in the vertical direction (Y direction) are linearly formed from the ventral side A to the back side B, respectively. It is arranged.

  As described above, as shown in FIG. 3, the high basis weight portion 43 and the low basis weight portion 44 (the horizontal groove 44 </ b> X and the vertical groove 44 </ b> Y) of the absorbent core 41 are integrally formed, and the diaper 1 is not blocked. The region 412 is also integrally formed with the high basis weight portion 43 and the low basis weight portion 44 (lateral groove 44X, vertical groove 44Y). Here, “being integrally formed” means that the high basis weight portion 43, the low basis weight portion 44 (the horizontal groove 44X, the vertical groove 44Y) and the non-blocking region 412 are connected via a bonding means such as an adhesive or heat fusion. Without being separable from each other, meaning that they are integrally formed from the same material. Thus, when the high basic weight part 43, the low basic weight part 44 (the horizontal groove 44X, the vertical groove 44Y), and the non-blocking area | region 412 are integrally molded, it will have the continuity which a bodily fluid can move smoothly. A method for manufacturing such an absorber 4 will be described later.

  In the diaper 1, as shown in FIG. 3, the absorbent core 41 has a single pulp layer 410 formed on the most non-skin facing surface side. If demonstrating it concretely, the high basic weight part 43 which comprises the block-shaped area | region 411 is convex to the back surface sheet 3 side, and the non-blocking area | region 412 is also convex to the back surface sheet 3 side. Moreover, in the diaper 1, as shown in FIG. 3, the low basic weight part 44 (vertical groove 44Y) which comprises the block-shaped area | region 411 is dented on the surface sheet 2 side. Thus, as shown in FIG. 3, the absorbent core 41 of the diaper 1 has a raised portion that protrudes from the surface sheet 2 side toward the back sheet 3 side on the non-skin facing surface side in the thickness direction T of the diaper 1. (High basis weight portion 43) and a hollow portion (low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y)) recessed from the back sheet 3 side toward the top sheet 2 side is formed, and the most non-skin facing surface The top portions of the sides, that is, the high basis weight portion 43 and the non-blocking region 412 are formed of a layer 410 of pulp alone.

  Moreover, the hollow part (groove) recessed in the surface sheet 2 side of the absorbent core 41 is mainly formed by the low basis weight part 44 (the horizontal groove 44X, the vertical groove 44Y), and the back sheet 3 side of the absorbent core 41 The bulging portion that bulges is mainly formed by the high basis weight portion 43 and the non-blocking region 412. Here, “the hollow portion is mainly formed by the low basis weight portion 44” means that, for example, the high basis weight portion 43 near the boundary between the low basis weight portion 44 and the high basis weight portion 43 is a part of the recess. Similarly, “the raised portion is mainly formed by the high basis weight portion 43 and the non-blocking region 412” means, for example, the high basis weight portion 43 and the low basis weight portion. This includes the case where the low basis weight portion 44 in the vicinity of the boundary with 44 forms a part of the hollow portion.

  Moreover, as for the absorptive core 41 of the diaper 1, the low basic weight part 44 is unevenly distributed in the surface sheet 2 side (the skin opposing surface side of the absorber 4) in the thickness direction T of the diaper 1, as shown in FIG. ing. As shown in FIG. 3, the absorbent core 41 has a flat surface sheet 2 side.

  As shown in FIGS. 5 and 6, the absorbent core 41 of the absorbent body 4 provided in the absorbent article of the present invention has a plurality of high basis weight portions 43 arranged in a portion partitioned by the vertical groove 44 </ b> Y and the horizontal groove 44 </ b> X. Each is formed to be long in the vertical direction (Y direction). The vertical groove 44Y and the horizontal groove 44X have the same thickness, or the horizontal groove 44X is thinner than the vertical groove 44Y, and the width of the horizontal groove 44X in plan view. Is characterized by being wider than the width of the vertical groove 44Y. From the viewpoint of liquid absorption and liquid diffusion, it is preferable that the vertical groove 44Y and the horizontal groove 44X have the same thickness, or the horizontal groove 44X is thinner than the vertical groove 44Y.

When the absorbent core 41 is used in a disposable diaper, the total length in the vertical direction (Y direction) is preferably 250 mm or more and 550 mm or less, and the total width in the horizontal direction (X direction) is preferably 50 mm or more and 200 mm or less.
The block-shaped region 411 has a length in the longitudinal direction (Y direction) of 70% or more, preferably 85% or more, and 98% or less, preferably 98% or less of the entire length of the absorbent core 41 in the Y direction. The length is preferably 95% or less, more specifically 70% or more and 98% or less, and more preferably 85% or more and 95% or less.
The block shape region 411 has a length in the lateral direction (X direction) of 30% or more, preferably 50% or more, and 90% or less, preferably 90% or less of the entire width of the absorbent core 41 in the X direction. The length is preferably 70% or less, more specifically, 30% or more and 90% or less, and more preferably 50% or more and 70% or less.
When the block-shaped region 411 is used for a disposable diaper, the total length in the vertical direction (Y direction) is preferably 100 mm or more and 540 mm or less, and the total width in the horizontal direction (X direction) is preferably 20 mm or more and 140 mm or less.
When the non-blocking region 412 is used in a disposable diaper, the length in the vertical direction (Y direction) at each end in the vertical direction (Y direction) is preferably 10 mm or more and 150 mm or less.
When the non-blocking region 412 is used for a disposable diaper, the length in the lateral direction (X direction) of each side portion along the longitudinal direction (Y direction) is 10 mm or more and 40 mm or less in the ventral side portion A. The crotch part C is preferably 10 mm or more and 30 mm or less, and the back side part B is preferably 10 mm or more and 40 mm or less.

The size and basis weight of the high basis weight portion 43 and the low basis weight portion 44 (lateral groove 44X, vertical groove 44Y) constituting the block shape region 411 will be further described in detail.
In the diaper 1, the high basic weight part 43 is formed in a rectangular shape that is long in the vertical direction (Y direction) in plan view, as shown in FIG. In the diaper 1, the high basis weight portion 43 is formed in a rectangular shape in plan view, but the four corners may have an arc shape, such as a polygonal shape, an ellipse, or a combination thereof. Also good.
When the absorbent article is used in a disposable diaper, for example, the high basis weight portion 43 of the diaper 1 has a length L4 in the longitudinal direction (Y direction) of 5 mm or more, preferably 15 mm, as shown in FIG. As described above, it is preferably 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 L5 in the lateral direction (X direction) is 3 mm or more, preferably 5 mm or more, and 20 mm or less, preferably 15 mm or less, more specifically 3 mm or more and 20 mm or less, preferably 5 mm. More preferably, it is 15 mm or less.

As shown in FIG. 6, the width L6 of the linear horizontal groove 44X extending in the horizontal direction (X direction) is wider than the width L7 of the linear vertical groove 44Y extending in the vertical direction (Y direction). L7 is 110% or more, preferably 120% or more, and 500% or less, preferably 300% or less, more specifically 110% or more and 500% or less. Preferably, the width is 120% or more and 300% or less.
The width L6 of the linear horizontal groove 44X extending in the horizontal direction (X direction) is 2% or more, preferably 5% or more of the length (L4) in the vertical direction (Y direction) of the high basis weight portion 43. And a length of 25% or less, preferably 20% or less, more specifically a length of 2% or more and 25% or less, and preferably a length of 5% or more and 20% or less. Further preferred.
The width L7 of the linear vertical groove 44Y extending in the vertical direction (Y direction) is 2% or more, preferably 10% or more of the length L5 in the horizontal direction (X direction) of the high basis weight portion 43, The length is 30% or less, preferably 25% or less, more specifically 2% or more and 30% or less, and preferably 10% or more and 25% or less. preferable.
The width L6 of the linear transverse groove 44X extending in the lateral direction (X direction) is 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 3 mm when the absorbent article is used in, for example, a disposable diaper. More specifically, it is preferably 0.5 mm or more and 5 mm or less, more preferably 1 mm or more and 3 mm or less.
The width L7 of the linear longitudinal groove 44Y extending in the longitudinal direction (Y direction) is 0.01 mm or more, preferably 0.02 mm or more, and 4.6 mm when the absorbent article is used in a disposable diaper, for example. Hereinafter, it is preferably 2.8 mm or less, more specifically 0.01 mm to 4.6 mm, and more preferably 0.02 mm to 2.8 mm.
The widths L4 and L5 are measured values at the position of the bottom of the hollow portion (low basis weight portion 44 (lateral groove 44X, vertical groove 44Y)) in the absorbent body 4.

The horizontal groove 44X and the vertical groove 44Y have the same thickness, or the horizontal groove 44X is thinner than the vertical groove 44Y, and the thickness (low basis weight) of the low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y). The portion 44 (thickness of the bottom portion of the horizontal groove 44X, vertical groove 44Y) is preferably 30% or more and 90% or less of the thickness of the high basis weight portion 43. Specifically, the thickness of the low basis weight portion 44 (lateral groove 44X, vertical groove 44Y) is 1.5 mm or more, preferably 2.5 mm or more, and 4.5 mm or less, preferably 4.0 mm or less, more specifically. Specifically, it is preferably 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 4.0 mm or less. Further, the thickness of the vertical groove 44Y and the thickness of the horizontal groove 44X will be described in detail. The horizontal groove 44X is thinner than the vertical groove 44Y, and the thickness of the vertical groove 44Y is 1.5 mm or more, preferably 2.5 mm or more, and 4 0.5 mm or less, preferably 4.0 mm or less, more specifically 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 4.0 mm or less. The thickness of the lateral groove 44X is 1.5 mm or more, preferably 2.5 mm or more, and 4.5 mm or less, preferably 4.0 mm or less, more specifically 1.5 mm or more and 4.5 mm or less. It is preferable that it is 2.5 mm or more and 4.0 mm or less. The thickness of the high basis weight portion 43 is 2 mm or more, preferably 3 mm or more, and 8 mm or less, preferably 7 mm or less, more specifically 2 mm or more and 8 mm or less, and preferably 3 mm or more and 7 mm or less. Is more preferable. The thickness of the non-blocking region 412 is the same as the thickness of the high basis weight portion 41.
In addition, the thickness of the high basis weight part 43, the low basis weight part 44 (the horizontal groove 44X, the vertical groove 44Y) and the non-blocking region 412 is obtained by cutting the sample into a predetermined size and pressurizing the measurement site at 5 kPa for 10 minutes. Measure immediately after the test. The measurement location is 3 points or more including 1 point or more each of the abdominal side, crotch portion, and back side per one sheet, and the average thickness of 2 diaper samples (6 or more measurement locations) is obtained. For example, the diaper 1 is cut with a sharp razor in the vertical direction (Y direction) or the horizontal direction (X direction) shown in FIG. 2, and the cross section of the cut sample is measured. The thickness of the high basis weight portion 43 and the non-blocking region 412 is a value measured at the thickest position in the convex portion, and the thickness of the low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y) is within the bottom of the recess. It is a value measured at the thinnest position. When it is difficult to measure with the naked eye, the section of the cut sample may be observed and measured at a magnification of 20 to 50 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE).

When the absorbent article is used in a disposable diaper, for example, the low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y) efficiently diffuses body fluid over a wide range of the absorbent body and efficiently utilizes the absorption capacity. From the standpoint of softness and softness, the basis weight is 20% or more, preferably 30% or more, and 80% or less, preferably 70% or less, more specifically, of the basis weight of the high basis weight portion 43. 20% or more and 80% or less, more preferably 30% or more and 70% or less.
Specifically, the low basis weight portion 44 (lateral groove 44X, vertical groove 44Y) has a basis weight of 100 g / m ² or more, preferably 150 g / m ² or more, and 500 g / m ² or less, preferably 400 g. / M ² or less, more specifically 100 g / m ² or more and 500 g / m ² or less, more preferably 150 g / m ² or more and 400 g / m ² or less. The high basis weight portion 43 has a basis weight of 300 g / m ² or more, preferably 350 g / m ² or more, and 900 g / m ² or less, preferably 800 g / m ² or less, 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 area 412 is the same as the basis weight of the high basis weight portion 41.
The basis weights of the high basis weight portion 43 and the low basis weight portion 44 (lateral groove 44X, longitudinal groove 44Y) are measured as follows.

<Measurement method of basis weight>
The measuring method of the basic weight of the high basic weight part 43, the low basic weight part 44 (the horizontal groove 44X, the vertical groove 44Y), and the non-blocking area | region 412 is as follows.
The absorbent core 41 is cut using a feather blade razor along the boundary line between the high basis weight portion 43 and the low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y). Ten pieces of the high basis weight portion 43 obtained by cutting were measured using an electronic balance (Electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point). Find the average weight of the pieces. The calculated average weight is divided by the average area per piece of the high basis weight portion 43 to calculate the basis weight of the high basis weight portion 43. The basis weight of the non-block area 412 is calculated in the same manner as the basis weight of the high basis weight portion 43.
Next, along the boundary line extending in the longitudinal direction (Y direction) of the high basis weight portion 43 and the low basis weight portion 44 (vertical groove 44Y), the length is 100 mm and the width is the low basis weight portion 44 (vertical groove 44Y). In accordance with the design dimension of the width, a small striped low basis weight portion 44 (longitudinal groove 44Y) 5 pieces are cut out using a feather blade razor. Each of the 5 pieces obtained was measured using an electronic balance (Electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point), and on average, one piece of the low basis weight portion 44 (vertical groove 44Y). Find the average weight of The basis weight of the low basis weight portion 44 (vertical groove 44Y) is calculated by dividing the obtained average weight by the average area per piece of the low basis weight portion 44 (vertical groove 44Y). For the low basis weight portion 44 (horizontal groove 44X), the basis weight is calculated in the same manner as the low basis weight portion 44 (vertical groove 44Y).

In the absorbent body 4 of the diaper 1, the high basis weight portion 43 and the non-blocking region 412 are formed to be substantially the same or denser than the low basis weight portion 44 (lateral groove 44 </ b> X, longitudinal groove 44 </ b> Y).
When the absorbent article is used for, for example, a disposable diaper, the low basis weight portion 44 (the horizontal groove 44X and the vertical groove 44Y) has a high density from the viewpoint of liquid diffusion, the flexibility of the absorbent body, and fit. 50% or more, preferably 75% or more, and 100% or less, preferably 95% or less, more specifically 50% or more and 100% or less, more preferably 75% or more of the density of the amount part 43. More preferably, it is 95% or less.
Specifically, low basis weight portion 44 (lateral groove 44X, longitudinal grooves 44Y), the density, 0.05 g / cm ³ or higher, preferably 0.07 g / cm ³ or more, and, 0.15 g / cm ³ or less, preferably 0.13 g / cm ³ or less, and more specifically, is preferably not more than 0.05 g / cm ³ or more ^{0.15g / cm 3, 0.07g / cm} 3 or more 0.13 g / cm More preferably, it is ³ or less. Also, high basis weight portion 43, its density, 0.05 g / cm ³ or higher, preferably 0.07 g / cm ³ or more, and, 0.15 g / cm ³ or less, preferably 0.13 g / cm ³ or less and more specifically, it is preferably 0.05 g / cm ³ or more 0.15 g / cm ³ or less, and more preferably not more than 0.07 g / cm ³ or more 0.13 g / cm ^3. The density of the non-blocking region 412 is the same as the density of the high basis weight portion 41.
The density of the high basis weight portion 43, the non-blocking region 412 and the low basis weight portion 44 (the lateral groove 44X, the longitudinal groove 44Y) is the density of the high basis weight portion 43, the non-blocking region 412 and the low density portion 44 obtained by the method described above. Calculated by dividing the basis weight by the respective thicknesses determined by the method described above.

  In the diaper 1, a space 9 is formed between the low basis weight portion 44 (the horizontal groove 44 </ b> X and the vertical groove 44 </ b> Y) of the absorbent core 41 and the covering material 42. That is, a space 9 formed by the absorbent core 41 and the covering material 42 that wraps the absorbent core 41 is formed in the absorbent body 4. As described above, in the diaper 1, as shown in FIGS. 2 and 3, the low basis weight portion 44 (horizontal groove 44 </ b> X, vertical groove 44 </ b> Y) is on the back sheet 3 (non-skin facing surface) side of the absorbent core 41. It is formed in a lattice shape as a whole, and a high basis weight portion 43 is arranged at the position of the lattice, and a low basis weight portion 44 (horizontal groove 44X, vertical groove 44Y) is formed so as to surround the high basis weight portion 43. ing. Accordingly, in the diaper 1, as shown in FIGS. 2 and 3, a plurality of spaces 9 </ b> X formed by the lateral grooves 44 </ b> X recessed toward the top sheet 2 and the covering material 42 are formed in the lateral direction (X A plurality of spaces 9Y formed by the vertical grooves 44Y and the covering material 42 that are continuously extended in the direction (direction) and formed in the surface sheet 2 side, respectively, correspond to the vertical grooves 44Y in the vertical direction (Y direction). It extends continuously.

In the disposable diaper 1, as shown in FIG. 3, a hydrophilic intermediate sheet 5 is disposed between the absorbent body 4 and the top sheet 2. Specifically, a rectangular intermediate sheet 5 that is long in the longitudinal direction (Y direction) is disposed between the top sheet 2 and the covering material 42 that constitutes the absorber 4. Such an intermediate sheet 5 is a so-called sub-layer sheet, and is arranged from the abdominal side A to the back side B so as to cover the absorbent core 41 constituting the absorber 4. The intermediate sheet 5 (sublayer sheet) preferably has a basis weight of 15 g / m ² or more and 100 g / m ² or less. As the intermediate sheet (sublayer sheet), a sheet mainly composed of hydrophilic fibers (sheet having a hydrophilic fiber content of preferably 90% by mass or more) can be used. Examples of the sheet include paper, Nonwoven fabrics, webs and the like can be mentioned.

  In the diaper 1, the absorbent core 41 and the covering material 42 that wraps the absorbent core 41 are fixed via an adhesive, and the absorbent body 4 having the fixed absorbent core 41 and the covering material 42 is attached to the surface. The sheet 2 and the back sheet 3 are fixed to each other via an adhesive. In particular, in the diaper 1, the covering material 42 and the non-skin facing surface 41 </ b> U of the absorbent core 41 are joined by a non-skin-side absorbent adhesive 51 </ b> U, and the non-skin-side absorbent adhesive 51 </ b> U is the diaper 1. The coating is applied intermittently in the horizontal direction (X direction) and in a straight line in the vertical direction (Y direction). Specifically, in the diaper 1, as shown in FIG. 3, both sides of the covering material 42 are folded using a single covering material 42, and the covering material 42 is placed on the back sheet 3 side of the absorbent core 41. The absorbent core 41 is wrapped so that the side edges of each other overlap. Therefore, in one covering material 42, the part disposed on the skin facing surface 41 </ b> T side of the absorbent core 41 becomes the skin-side covering member 421, and the part disposed on the non-skin facing surface 41 </ b> U side of the absorbent core 41. A non-skin side covering member 422 is formed. In the diaper 1, as described above, the skin-side covering member 421 and the non-skin-side covering member 422 are formed from one covering material 42, but may be formed from two separate covering materials. Good. Then, the non-skin-side covering member 422 on the back sheet 3 side of the covering material 42 and the non-skin-facing surface 41U of the absorbent core 41 are interposed via the non-skin-side absorbent core adhesive 51U (see FIG. 3A). It is fixed.

In the diaper 1, the non-skin-side absorbent core adhesive 51 </ b> U is, for example, intermittently in the horizontal direction (X direction) and straight in the vertical direction (Y direction) using a coater gun as shown in FIG. It is coated in the shape of a stripe, and is coated in a stripe shape as a whole. The interval between the non-skin-side absorbent core adhesives 51U adjacent in the lateral direction (X direction) is preferably 0.5 mm or more and 15 mm or less. The basis weight (coating amount) of the non-skin-side absorbent core adhesive 51U is 0.5 g / m ² or more, preferably 1 g / m ² or more, and 15 g / m ² or less, preferably 10 g / m. m ² or less, more specifically, preferably 0.5 g / m ² or more and 15 g / m ² or less,
It is further preferred 1 g / m ² or more and 10 g / m ² or less.

Next, the absorbent body 4 included in the diaper 1, that is, the high basis weight portion 43 (high density), the non-blocking region 412 (high density) and the low basis weight portion 44 (low density) (lateral groove 44 </ b> X, vertical groove 44 </ b> Y). The manufacturing method of the absorber 4 provided with the integrally formed absorptive core 41 is demonstrated.
FIG. 7 shows an embodiment of a method for manufacturing the absorbent body 4 and a manufacturing apparatus used therefor. The manufacturing apparatus of the absorbent body 4 includes a rotary drum 50 that is rotationally driven in the direction of arrow R1, and a duct 60 that supplies an absorbent material 45 containing an absorbent polymer that is a raw material of the absorbent core 41 to the outer peripheral surface of the rotary drum 50. The transfer roll 70 disposed obliquely below and downstream of the rotary drum 50 and driven to rotate in the direction of the arrow R2, and the vacuum box 65 disposed between the duct 60 and the transfer roll 70 in the circumferential direction of the rotary drum 50 A mesh belt 75 that is a sheet-like air-permeable member disposed between the vacuum box 65 and the rotary drum 50 and between the transfer roll 70 and the rotary drum 50, and below the transfer roll 70. A vacuum conveyor 80 is provided.

  As shown in FIG. 7, the rotating drum 50 has a cylindrical shape, and receives power from a motor such as a motor, and a member forming the outer peripheral surface thereof rotates about a horizontal axis. A space 56 capable of depressurizing the inside is formed in a non-rotating portion on the inner side (rotating shaft side) of the rotating drum 50. A known exhaust device (not shown) such as an intake fan is connected to the space 56, and the interior of the space 56 can be maintained at a negative pressure by operating the exhaust device. On the other hand, piping (not shown) capable of taking in air outside the apparatus is connected to the spaces 57 and 58 on the inner side (rotating shaft side) of the rotating drum 50.

  As shown in FIG. 7, a plurality of drum recesses 51 having a shape corresponding to the shape of the absorbent core 41 to be manufactured are formed on the outer peripheral surface of the rotary drum 50 at equal intervals in the R1 direction. As shown in FIG. 8, a mesh plate 52 in which a large number of pores are formed and a metal or resin impermeable member 53 are arranged on the bottom surface of each drum recess 51. Here, the air-impermeable member 53 is provided so as to protrude on the mesh plate 52, and is arranged so as to correspond to the shape and position of the low basis weight portion 44 (lateral groove 44X, vertical groove 44Y) described above. ing. That is, the air permeable member 53 corresponding to the horizontal groove 44X is formed wider than the width of the air permeable member 53 corresponding to the vertical groove 44Y. As shown in FIG. 8, a region 54 composed only of the mesh plate 52 partitioned by the air-impermeable member 53 arranged in this way becomes a portion corresponding to the high basis weight portion 43, and is partitioned by the air-permeable member 53. A region 55 consisting only of the mesh plate 52 in the entire outer periphery of the portion thus formed becomes a portion corresponding to the non-blocking region 412. Moreover, the part of the outer peripheral surface of the rotating drum 50 in which the drum recessed part 51 is not formed consists of the frame body of the rotating drum 50 which consists of metal rigid bodies, and is non-breathable.

  As shown in FIG. 7, one end side of the duct 60 covers the outer peripheral surface of the rotary drum 50 positioned on the space 56 maintained at a negative pressure, and the other end side (not shown) has a fiber material introduction device. have. The fiber material introducing device includes, for example, a pulverizer that crushes sheet-like wood pulp into defibrated pulp and sends the defibrated pulp (fiber material) into the duct, and introduces an absorbing polymer into the duct 60 An absorbent polymer introduction part is provided.

  The transfer roll 70 has a cylindrical outer peripheral portion having air permeability, and the outer peripheral portion rotates in the R2 direction upon receiving power from a prime mover such as a motor. In the non-rotating portion on the inner side (rotating shaft side) of the transfer roll 70, a space 71 that can be depressurized is formed. A known exhaust device (not shown) such as an intake fan is connected to the space 71, and the interior of the space 71 can be maintained at a negative pressure by operating the exhaust device.

  The vacuum box 65 is disposed between the downstream end 601 of the duct 60 and the transfer roll 70 in the rotation direction R1 of the rotary drum 50. The vacuum box 65 has a box-like shape and has an opening that opens in the direction of the rotating drum 50 at a portion facing the rotating drum 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 a belt-shaped breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls and transfer rolls 70 to move along a predetermined path. The mesh belt 75 is driven by the rotation of the transfer roll 70. While the mesh belt 75 passes in front of the opening of the vacuum box 65, the mesh belt 75 is in contact with the outer peripheral surface of the rotary drum 50, and the transfer roll 70 and the rotary drum 50 are closest to each other. In the vicinity of the portion, the transfer drum 70 moves away from the outer peripheral surface of the rotating drum 50.

  The vacuum conveyor 80 includes an endless breathable belt 83 that is stretched between the drive roll 81 and the driven roll 82, and a vacuum box 84 that is disposed at a position facing the transfer roll 70 with the breathable belt 83 interposed therebetween. ing.

Next, a method for continuously manufacturing the absorbent body 4 (absorbent core 41) using the above-described absorbent body manufacturing apparatus will be described.
First, the exhaust device connected to each of the space 56 in the rotary drum 50 and the vacuum box 65 is operated to make negative pressure. This is because the negative pressure in the space 56 causes an air flow that conveys the absorbent material 45 to the outer peripheral surface of the rotary drum 50 in the duct 60. Next, the rotating drum 50 and the transfer roll 70 are rotated, and the vacuum conveyor 80 is operated. Then, the fiber material introduction device is operated to supply first defibrated pulp (fiber material) into the duct 60. The pulp (fiber material) rides on the airflow flowing in the duct 60 and is scattered to be supplied toward the outer peripheral surface of the rotating drum 50.

  While the portion covered by the duct 60 is being conveyed, pulp (fiber material) is sucked into the drum recess 51 of the rotary drum 50. As shown in FIG. 9, the pulp (fiber material) is gradually deposited on the mesh plate 52 in each region 54 and region 55 of the drum recess 51. The pulp (fiber material) deposit 410a thus obtained becomes a portion corresponding to the layer 410 of the pulp alone.

  Next, when the defibrated pulp (fiber material) is supplied into the duct 60 and further the absorbent polymer is supplied, the absorbent material 45 rides on the airflow flowing through the duct 60 and is in a scattered state. Is supplied toward the outer peripheral surface of the rotary drum 50.

  While the portion covered with the duct 60 is being conveyed, the absorbent material (mixture of fiber material and absorbent polymer) 45 is sucked onto the deposit 410a in the drum recess 51 of the rotary drum 50. The As shown in FIG. 9, the absorbent material 45 gradually deposits on the deposit 410 a deposited on the mesh plate 52 in each region 54 and region 55 of the drum recess 51. In the deposit 46 obtained in this way, a portion (a portion corresponding to the breathable member 53) 46a formed by depositing the absorbent material 45 on the breathable member 53 has a relatively large deposit amount of the absorbent material 45. The other portions (corresponding to the region 54) 46b and the portion (corresponding to the region 55) 46c have a relatively large amount of deposited absorbent material 45 and have deposits 46 therein.

  Then, when the rotary drum 50 rotates and the drum concave portion 51 comes to the position opposite to the vacuum box 65, the deposit 46 in the drum concave portion 51 is sucked to the mesh belt 75 by the suction from the vacuum box 65. It becomes. In this state, the deposit 46 in the drum recess 51 is conveyed to a position immediately before the closest portion between the transfer roll 70 and the rotary drum 50, and is sucked from the transfer roll 70 side in the vicinity of the closest portion to the mesh belt. The mold is released from the drum recess 51 while being sucked by 75 and moved onto the transfer roll 70.

  In this way, the deposit 46 having the concavo-convex structure transferred onto the transfer roll 70 together with the mesh belt 75 is adsorbed to the mesh belt 75 on the transfer roll 70 while being transferred to the vacuum conveyor 80 (the lowermost end of the transfer roll 70). And is transferred to the vacuum conveyor 80 by suction by the vacuum box 84 at the delivery section.

  In the absorbent body manufacturing apparatus of the present embodiment, as shown in FIG. 7, a covering material 42 made of tissue paper or a hydrophilic nonwoven fabric is introduced onto the vacuum conveyor 80 before the deposit 46 is placed. Then, the deposit 46 moves on the covering material 42. Further, after the covering material 42 is folded by a folded plate (not shown) and the deposit 46 is wrapped with the covering material 42, the deposit 46 in the state wrapped with the covering material 42 is cut at a predetermined interval. Thus, the absorber precursor 49 cut to the size of one absorber is continuously manufactured.

  And in the absorber manufacturing apparatus of this embodiment, the absorber precursor 49 obtained in this way is compressed by the pressurizing means 90, and the thickness of the deposit 46 which comprises the absorber precursor 49 is actively reduced. Thus, the intended absorber 4 (absorbent core 41) is obtained. As shown in FIG. 7, the pressurizing means 90 includes a pair of rolls 91 and 92 having at least one surface smooth, and pressurizes an object to be pressed introduced between the rolls 91 and 92 from the upper and lower surfaces in the thickness direction. It is configured to be compressible.

  When the deposit 46 is compressed by the pressurizing means 90, the portion (region 54 corresponding portion) 46b and the portion (region 55 corresponding portion) 46c where the absorbent material is relatively large and the thickness is relatively large. The portion is compressed more strongly than the portion 46a having a small thickness (corresponding to the breathable member 53). As a result, in the absorbent body 4 (absorbent core 41) manufactured using the manufacturing apparatus described above, the portion (region 54 corresponding portion) 46b (convex portion) and the portion (region 55 corresponding portion) 46c of the deposit 46 are included. However, in the absorbent core 41, the high basis weight portion 43 and the non-blocking region 412 having a relatively high density are formed, and a portion (corresponding portion) 46a (concave portion) in the deposit 46 is formed in the absorbent core 41. It becomes the low basic weight part 44 (horizontal groove 44X, vertical groove 44Y) of a relatively low density.

The formation material of the disposable diaper 1 of this embodiment is demonstrated.
The back sheet 3 and the three-dimensional gather forming sheet 62 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, as the back sheet 3, a resin film or a laminate of a resin film and a nonwoven fabric can be used. As the three-dimensional gather forming sheet 62, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.
The fastening tape 7 can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, male members in “Magic Tape (registered trademark)” (manufactured by Kuraray Co., Ltd.), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu (registered trademark)” (manufactured by Kanebo Bell Touch), etc. Can be used.

As the absorptive core 41 that constitutes the absorbent body 4, a structure in which absorbent polymer particles are held in an aggregate of fibers such as pulp fibers can be used. As the covering material 42 constituting the absorbent body 4, a hydrophilic sheet, for example, a core-wrap sheet made of a water-permeable thin paper (tissue paper) or a water-permeable nonwoven fabric can be used.
Examples of the elastic member 61 for forming a three-dimensional gather, the leg elastic member 63, and the waist elastic member 64 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and ethyl acrylate-ethylene. A thread-like stretchable material made of a polyethylene-α-olefin copolymer or the like can be used.

  As the adhesive (non-skin-side absorbent core adhesive 51U and the like), any adhesive can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hot melt adhesive is used. be able to. Examples of the hot melt adhesive include blocks such as styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), and styrene-ethylene-butylene-styrene copolymer (SEBS). Copolymer-based hot melt adhesives may be mentioned.

The effect at the time of using the disposable diaper 1 of embodiment of this invention mentioned above is demonstrated.
As shown in FIGS. 2 and 3, the diaper 1 has a high basis weight portion 43 that is long in the vertical direction (Y direction) arranged in the horizontal groove 44X, the vertical groove 44Y, and the portion partitioned by the horizontal groove 44X, the vertical groove 44Y. A block-shaped region 411 consisting of Since the absorbent core 41 having the high basis weight portion 43 that is long in the vertical direction (Y direction) is used, body fluid flows in the vertical direction (Y direction) when the wearer excretes the diaper 1 while wearing it. easy. 2 and 3, the absorbent core 41 of the absorbent body 4 of the diaper 1 has the same thickness of the horizontal groove 44X and the vertical groove 44Y, or the horizontal groove 44X is thinner than the vertical groove 44Y. Since the width of the horizontal groove 44X is wider than the width of the vertical groove 44Y in plan view, body fluid flows more easily along the horizontal groove 44X than the vertical groove 44Y, as shown in FIG. In this way, as shown in FIG. 10, the body weight easily flows in the vertical direction (Y direction) by the high basis weight portion 43 that is long in the vertical direction (Y direction) of the block-shaped region 411, and further, the horizontal groove 44X causes the horizontal groove 44X to enter the horizontal groove 44X. Accordingly, the body fluid easily flows in the lateral direction (X direction), and the body fluid can be efficiently diffused in a wide range of the absorber 4. Therefore, a wide range of absorption capacity of the absorber 4 can be utilized efficiently. In particular, in the diaper 1, as shown in FIG. 3, the absorbent core 41 has a raised portion and a back surface in which the skin facing surface side is flat and the non-skin facing surface side is raised from the top sheet 2 side toward the back sheet 3 side. Since the hollow part which became depressed toward the surface sheet 2 side from the sheet | seat 3 side is formed, the said effect is further show | played.

Moreover, the diaper 1, as shown in FIG. 5, the absorbent core 41 has a block-shaped region 411 and the non-blocking region 412, the whole overall width W _A of the front section A is in the rear section B is the same as the width W _B, the width W _B1 of the width W _A1 and the rear section B of the stomach portion a of the block-shaped regions 411 have the same. As shown in FIGS. 2 and 5, the non-blocking region 412 is formed in a shape in which the portion closer to the ventral side A from the central portion in the vertical direction (Y direction) is inwardly bound as a whole. The entire area of the side portion B is larger than the entire area of the ventral side portion A. Therefore, when using the diaper 1 for a newborn baby used in the state of lying on its back, body fluid can be efficiently diffused in the absorbent core 41 in the dorsal side B.

  In addition, as shown in FIG. 3A, the diaper 1 has a non-skin-side absorbent adhesive 51U that joins the covering material 42 and the non-skin facing surface 41U of the absorbent core 41 in the lateral direction of the diaper 1 ( It is applied in a straight line in the vertical direction (Y direction) intermittently in the X direction). Thus, the non-skin-side absorbent adhesive 51U is applied in a straight line in the longitudinal direction (Y direction) to the absorbent core 41 having the high basis weight portion 43 that is long in the longitudinal direction (Y direction). Therefore, if a wearer excretes during wearing of the diaper 1, the flow of a bodily fluid will be restrict | limited and it will flow easily in a vertical direction (Y direction).

In the diaper 1, as shown in FIG. 3, a layer 410 of a single pulp is formed on the most non-skin facing surface side of the absorbent core 41. Therefore, the body fluid can smoothly move through the absorbent core 41, the body fluid can be efficiently diffused over a wide range of the absorber 4, and the absorption capacity of the wide range of the absorber 4 can be efficiently utilized. There is an effect that you can.
Moreover, as shown in FIG. 3, the diaper 1 has the surface sheet 2 which has many convex parts 21 convex on the skin facing surface side and concave parts 22 adjacent to the convex parts 21, and the skin sheet of the top sheet 2 faces the skin. The surface side has an uneven structure. Therefore, even after the wearer excretes during wearing, a gap is formed between the wearer's skin and the surface sheet 2, improving air permeability and improving the touch.
Further, as shown in FIG. 3, the diaper 1 has an intermediate sheet 5 (sublayer sheet) disposed between the top sheet 2 and the covering material 42, so that the liquid is smoothly transferred to the absorber 4. The effect of.

  The disposable diaper which is one embodiment of the absorbent article of the present invention is not limited to the disposable diaper of the above-described embodiment, and can be appropriately changed.

For example, in the disposable diaper 1 of the above-mentioned embodiment, as shown in FIG. 3, the absorbent core 41 is directed from the top sheet 2 side to the back sheet 3 side on the non-skin facing side as shown in FIG. 3. The raised portion and the recessed portion recessed from the back sheet 3 side toward the top sheet 2 side are formed, but the non-skin facing surface side may be flat.
Moreover, in the disposable diaper 1 of the above-mentioned embodiment, as shown in FIG. 3, although the hydrophilic intermediate sheet 5 is distribute | arranged between the absorber 4 and the surface sheet 2, the intermediate sheet 5 is distribute | arranged. It does not have to be.

  Moreover, in the disposable diaper 1 of the above-mentioned embodiment, as shown in FIG. 4, the surface sheet 2 consists of the 1st layer 23 and the 2nd layer 24 of a sheet-like thing, and comprises the skin opposing surface of the surface sheet 2 The first layer 23 that protrudes to the skin facing surface side has a large number of convex portions 21 that are hollow inside, and the second layer 24 that constitutes the non-skin facing surface of the topsheet 2 is planar. Yes. In place of such a surface sheet 2, a flat general nonwoven fabric used for absorbent articles such as disposable diapers may be used, and as shown in FIG. A surface sheet in which the inside of the convex portion 21 is solid, and the convex portion 21 and the concave portion 22 extend in the vertical direction (Y direction) and are alternately arranged in the horizontal direction (X direction) may be used. .

  Moreover, it replaces with the above-mentioned surface sheet 2, and contains the 1st fiber layer containing a heat-shrinkable fiber, the fiber which does not heat-shrink substantially, or the fiber which does not heat-shrink substantially at the shrinkage start temperature of the said heat-shrinkable fiber. After laminating and partially bonding the second fiber layer, an uneven sheet obtained by shrinking the first fiber layer by hot air treatment may be used as the top sheet. In the surface sheet, the second fiber layer protrudes at a portion other than the joint portion with the first fiber layer to form a convex portion, while the joint portion forms a concave portion. The heat-shrinkable fiber is preferably a latent crimpable fiber. As such an uneven sheet, those described in JP 2002-187228 A, JP 2003-250836 A, JP 2004-166849 A, JP 2004-202890 A, and the like can be used.

  Moreover, in the disposable diaper 1 of the above-mentioned embodiment, as shown to FIG. 2, FIG. 5, the absorptive core 41 of the absorber 4 is a rectangular block-shaped area | region 411 long in a vertical direction (Y direction), And a non-blocking region 412 arranged over the outer periphery of the block-shaped region 411. Instead of the absorbent core 41 of the absorbent body 4, the absorbent cores 41 </ b> A to 41 </ b> D shown in FIGS. 12 to 15 may be provided. Regarding the absorbent cores 41 </ b> A to 41 </ b> D shown in FIG. 12 to FIG. 15, the explanation in detail regarding the absorbent core 41 included in the diaper 1 is appropriately applied to points that are not particularly described. 12-15, the same code | symbol is attached | subjected to the same member as FIG. The absorbent cores 41 </ b> A to 41 </ b> D shown in FIG. 12 to FIG. 15 are lateral (X direction) outward in both side edges in the ventral side A and both side edges in the back side B than both side edges in the crotch C. And has a block-shaped region 411 formed in a shape in which the central portion in the longitudinal direction (Y direction) is constricted inward as a whole, and the shape in which the central portion in the longitudinal direction (Y direction) is constricted inward The non-blocking region 412 is formed. Moreover, it replaces with the absorptive core 41 of the above-mentioned absorber 4, and does not have the non-blocking region 412, but each of the plurality of linear lateral grooves 44X extends over the entire length in the lateral direction (X direction), An absorbent core in which each of the linear vertical grooves 44Y extends over the entire length in the vertical direction (Y direction) may be used.

  The block shape region 411 of the absorbent core 41A shown in FIG. 12 will be described more specifically. In the absorbent core 41A, as shown in FIG. 12, the back side portion 411b of the block-shaped region 411 has a high basis weight portion 43 partitioned by the horizontal grooves 44X and the vertical grooves 44Y regularly in the horizontal direction (X direction). ) Is formed by regularly arranging four rows in the vertical direction (Y direction). In addition, as shown in FIG. 12, the crotch part 411c of the block-shaped region 411 has a block structure in which three high basis weight portions 43 are regularly arranged in the horizontal direction (X direction). Seven rows are arranged in the (Y direction). In addition, as shown in FIG. 12, the ventral side portion 411a of the block-shaped region 411 has five high basis weight portions 43 partitioned by the horizontal grooves 44X and the vertical grooves 44Y regularly arranged in the horizontal direction (X direction). The block structure formed is regularly arranged in four rows in the vertical direction (Y direction). In the block shape region 411 of the absorbent core 41A, as shown in FIG. 12, four of the six longitudinal grooves 44Y extending in the longitudinal direction (Y direction) are respectively connected from the ventral side A to the back side. It is arranged linearly over B.

  The block-shaped region 411 of the absorbent core 41B shown in FIG. 13 will be described more specifically. In the absorbent core 41B, as shown in FIG. 13, the back side portion 411b of the block-shaped region 411 has a regular basis in the horizontal direction (X direction), which is a high basis weight portion 43 partitioned by a horizontal groove 44X and a vertical groove 44Y. The four block structures are arranged regularly in the vertical direction (Y direction). Further, as shown in FIG. 13, the crotch part 411c of the block-shaped region 411 has three high basis weight portions 43 partitioned by the horizontal groove 44X and the vertical groove 44Y regularly arranged in the horizontal direction (X direction). The block structure is formed by regularly arranging seven rows in the vertical direction (Y direction). Further, as shown in FIG. 13, the ventral side portion 411a of the block-shaped region 411 is regularly arranged with four high basis weight portions 43 partitioned by the horizontal grooves 44X and the vertical grooves 44Y in the horizontal direction (X direction). The block structure is regularly arranged in four rows in the vertical direction (Y direction). In the block shape region 411 of the absorbent core 41B, as shown in FIG. 13, the vertical groove 44Y extending in any vertical direction (Y direction) is also linearly arranged from the ventral side A to the back side B. It has not been.

  The block shape region 411 of the absorbent core 41C shown in FIG. 14 will be described more specifically. In the absorbent core 41 </ b> C, as shown in FIG. 14, the back side portion 411 b of the block-shaped region 411 has a regular basis in the horizontal direction (X direction). A block structure in which five blocks are regularly arranged in three rows in the vertical direction (Y direction), and four high basis weight portions 43 are regularly arranged in the horizontal direction (X direction). , One row is regularly arranged in the vertical direction (Y direction). Further, as shown in FIG. 14, the crotch part 411c of the block-shaped region 411 is regularly arranged with three high basis weight portions 43 partitioned by the horizontal groove 44X and the vertical groove 44Y in the horizontal direction (X direction). The block structure is formed by regularly arranging seven rows in the vertical direction (Y direction). Further, as shown in FIG. 14, the ventral portion 411 a of the block-shaped region 411 is regularly arranged with four high basis weight portions 43 partitioned by the horizontal grooves 44 </ b> X and the vertical grooves 44 </ b> Y in the horizontal direction (X direction). A block structure in which one block is regularly arranged in the vertical direction (Y direction) and five high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in the vertical direction. Three rows are arranged in the direction (Y direction). In the block shape region 411 of the absorbent core 41C, as shown in FIG. 14, the vertical groove 44Y extending in any vertical direction (Y direction) is also linearly arranged from the ventral side A to the back side B. It has not been.

  The block shape region 411 of the absorbent core 41D shown in FIG. 15 will be described more specifically. In the absorbent core 41D, as shown in FIG. 15, the back side portion 411b of the block-shaped region 411 has a regular basis in the horizontal direction (X direction), which is a high basis weight portion 43 partitioned by the horizontal groove 44X and the vertical groove 44Y. A block structure in which six blocks are regularly arranged in three rows in the vertical direction (Y direction), and four high basis weight portions 43 are regularly arranged in the horizontal direction (X direction). , One row is regularly arranged in the vertical direction (Y direction). Further, as shown in FIG. 15, the crotch portion 411c of the block-shaped region 411 has two high basis weight portions 43 partitioned by the horizontal groove 44X and the vertical groove 44Y regularly arranged in the horizontal direction (X direction). The block structure is formed by regularly arranging seven rows in the vertical direction (Y direction). Further, as shown in FIG. 15, the ventral side portion 411a of the block-shaped region 411 is regularly arranged with four high basis weight portions 43 partitioned by the horizontal grooves 44X and the vertical grooves 44Y in the horizontal direction (X direction). The block structure in which one row is regularly arranged in the vertical direction (Y direction), and further, the block structure in which six high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is arranged vertically. Three rows are arranged in the direction (Y direction). In the block-shaped region 411 of the absorbent core 41D, as shown in FIG. 15, three of the seven longitudinal grooves 44Y extending in the vertical direction (Y direction) are respectively connected from the ventral side A to the back side. It is arranged linearly over B.

  Moreover, in the disposable diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, the low basic weight part 44 of the absorptive core 41 which comprises the absorber 4 is a linear transverse groove extended in a horizontal direction (X direction). 44X and linear vertical grooves 44Y extending in the vertical direction (Y direction) are formed in a lattice shape as a whole, but are not limited to the lattice shape.

  Moreover, although the disposable diaper 1 of the above-mentioned embodiment is a deployment-type disposable diaper, as shown in FIG. 1, a pants-type disposable diaper may be sufficient.

The following absorbent articles are disclosed regarding the embodiment described above.
<1> An absorbent article comprising a top sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorbent disposed between the two sheets. ,
The absorbent body has an absorbent core containing an absorbent polymer;
The absorbent core includes longitudinal grooves extending in the longitudinal direction of the absorbent article, transverse grooves extending in the lateral direction of the absorbent article, and the longitudinal grooves and the respective sections of the transverse grooves at the sections defined by the longitudinal grooves and the transverse grooves. It has a block-shaped region consisting of a plurality of vertically long high basis weight parts with a higher basis weight,
The longitudinal groove and the transverse groove have the same thickness or the transverse groove is thinner, and the width of the transverse groove is wider than the width of the longitudinal groove in plan view.

<2> As for the said absorptive core, the skin opposing surface side is flat, and the raised part which protruded toward the non-skin opposing surface side from the surface sheet side toward the back surface sheet side, and became depressed toward the surface sheet side from the back surface sheet side. The absorbent article according to <1>, wherein a recess is formed.
<3> The absorbent core includes the block-shaped region and a non-block region disposed over the outer periphery of the block-shaped region, and the entire width in the ventral side is the entire back side. The absorbent article according to <1> or <2>, wherein the width of the block-shaped region is the same between the ventral portion and the dorsal portion.
<4> The absorbent body includes the absorbent core and a coating material that wraps the absorbent core, and the coating material and the non-skin facing surface of the absorbent core are joined by a non-skin-side absorbent adhesive. The non-skin-side absorbent adhesive is applied intermittently in the transverse direction of the absorbent article and in a straight line in the longitudinal direction, according to any one of <1> to <3>. Absorbent article.
<5> The absorbent article according to any one of <1> to <4>, wherein the absorbent core has a pulp single layer formed on the most non-skin facing surface side.
<6> The surface sheet has a plurality of convex portions convex to the skin facing surface side and concave portions adjacent to the convex portion, and the skin facing surface side of the surface sheet has a concavo-convex structure. The absorbent article according to any one of to <5>.
<7> The absorbent article according to any one of <1> to <6>, wherein a hydrophilic intermediate sheet is disposed between the absorbent body and the top sheet.
<8> The absorbent article has left and right side edges on the abdominal side and left and right side edges on the back side extending laterally outward from the left and right side edges of the crotch part, and the left and right side edges of the crotch part are sideways. Curved inward in the direction of the arc, and has a shape in which the central portion in the longitudinal direction is bounded inward as a whole, and the top sheet and the back sheet are respectively on the left and right sides of the absorber Any one of the above <1> to <7>, which extends outward from the edge and both front and rear edges, and the topsheet has a lateral dimension smaller than a lateral dimension of the backsheet The absorbent article according to 1.
<9> A sheet for forming a three-dimensional gather having an elastic member fixed in an extended state in the longitudinal direction is disposed on and fixed to a side portion of the top sheet on each side portion along the longitudinal direction of the absorbent article. In this way, a pair of three-dimensional gathers are formed, and a plurality of leg elastic members for leg gather formation are arranged in an elongated state in the longitudinal direction on each side part along the longitudinal direction of the absorbent article, A leg gather is formed by contraction of the leg elastic member, and a waist elastic member for forming a waist gather is arranged in a laterally extended state at a longitudinal end on the back side of the absorbent article. The absorbent article according to any one of <1> to <8>, wherein a waist gather is formed by contraction of the waist elastic member.
<10> The absorbent according to the above <4>, wherein the absorbent body is formed by coating the absorbent core having a long liquid retention property with the coating material that is a liquid-permeable hydrophilic sheet. Goods.

<11> The block-shaped region of the absorbent core is formed in a lattice shape as a whole by the horizontal groove and the vertical groove, and each of the regions partitioned by the linear horizontal groove and the vertical groove, The absorbent article according to any one of <1> to <10>, wherein the high basis weight portion is arranged.
<12> The absorbent core has a low basis weight portion composed of the horizontal groove and the longitudinal groove, and the high basis weight portion and the low basis weight portion of the absorbent core are integrally formed, The absorbent article according to any one of <3> to <11>, wherein the non-block region is also integrally formed with the high basis weight portion and the low basis weight portion.
<13> In the absorbent core, the low basis weight portion is unevenly distributed on the topsheet side in the thickness direction of the absorbent article, and the absorbent core is flat on the topsheet side. The absorbent article according to <12>.
<14> The absorbent article according to any one of <1> to <13>, wherein the absorbent core has a total length in the vertical direction of 250 mm to 550 mm and a total width in the horizontal direction of 50 mm to 200 mm.
<15> The block-shaped region has a length in the vertical direction of 70% or more and 98% or less of the entire length of the absorbent core in the vertical direction, or a length of 85% or more and 95% or less. The absorbent article according to any one of <1> to <14>, wherein
<16> The block shape region has a length in the lateral direction of 30% or more and 90% or less of the entire width in the lateral direction of the absorbent core, or a length of 50% or more and 70% or less. The absorbent article according to any one of <1> to <15>, wherein
<17> The absorbent article according to any one of <1> to <16>, wherein the block-shaped region has a total length in the vertical direction of 100 mm to 540 mm and a total width in the horizontal direction of 20 mm to 140 mm.
<18> The absorbent article according to any one of <3> to <17>, wherein the non-blocking region has a length in the longitudinal direction of both end portions in the longitudinal direction of 10 mm to 150 mm.
<19> In the non-blocking region, the lateral lengths of both side portions along the vertical direction are 10 mm or more and 40 mm or less at the ventral side part A, 10 mm or more and 30 mm or less at the crotch part, The absorbent article according to any one of <3> to <18>, which is 10 mm or more and 40 mm or less.
<20> The high basis weight part is formed in a rectangular shape in a plan view, the four corners are arc-shaped, or a polygonal shape, an ellipse, or a combination thereof <1> to < The absorbent article according to any one of 19>.

<21> The width of the horizontal groove is wider than the width of the vertical groove, and the width of the horizontal groove / the width of the vertical groove is 110% or more and 500% or less, or 120% or more and 300% or less. The absorbent article according to any one of the above items <1> to <20>, which has a size of 1 mm.
<22> The width of the lateral groove is 2% or more and 25% or less of the length in the longitudinal direction of the high basis weight part, or 5% or more and 20% or less. The absorbent article according to any one of to <21>.
<23> The width of the longitudinal groove is 2% or more and 30% or less of the lateral length of the high basis weight part, or 10% or more and 25% or less. The absorbent article according to any one of> to <22>.
<24> The transverse groove and the longitudinal groove are formed with the same thickness, and the thickness of the low basis weight portion is 30% or more and 90% or less of the thickness of the high basis weight portion 43. <12 The absorbent article according to any one of> to <23>.
<25> The <12> to <24, wherein the low basis weight has a basis weight of 20% to 80%, or 30% to 70% of the basis weight of the high basis weight part. > Any one of>.
<26> In the absorber, the high basis weight part and the non-blocking region are the same as or higher in density than the low basis weight part, and any one of <12> to <25> The absorbent article of Claim 1.
<27> Said <12>-<26> whose said low basic weight part has the density of 50% or more and 100% or less of the density of said high basic weight part, or 75% or more and 95% or less. The absorbent article of Claim 1.
<28> The absorbent article according to any one of <12> to <27>, wherein a space is formed between the low basis weight portion of the absorbent core and the covering material.
<29> Any one of the above <7> to <28>, wherein the intermediate sheet having a rectangular shape that is long in the vertical direction is disposed between the top sheet and the covering material that constitutes the absorber. Absorbent article.
<30> The intermediate sheet is a sub-layer sheet, and is arranged from the abdominal side part to the back side part so as to cover the absorbent core constituting the absorbent body. the absorbent article of any one described above basis weight of 15 g / m ² or more 100 g / m ² or less <7> - <29>.

<31> As the intermediate sheet, a sheet mainly composed of hydrophilic fibers (sheet having a hydrophilic fiber content of preferably 90% by mass or more) is used. The absorbent article according to <30>, wherein a nonwoven fabric, a web is used.
<32> The absorbent article according to any one of <1> to <31>, wherein the absorbent article is a deployable disposable diaper.
<33> The absorbent article according to any one of <1> to <31>, wherein the absorbent article is a pants-type disposable diaper.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the embodiments according to the scope of the present invention.

[Example 1]
The absorber 4 was manufactured using the apparatus shown in FIG. 7, and the disposable diaper 1 shown in FIG. 2 was produced. The surface sheet 2 will be described in detail. As the surface sheet, the surface sheet having the same structure as the two-layered uneven surface sheet shown in FIG. 4 is used. As the upper layer and the lower layer of the surface sheet, the basis weight is 18 g / m. using ² of liquid-permeable air-through nonwoven fabric, for upper layer used was imparted irregularities by embossing to the air-through nonwoven fabric. The basis weight of the upper layer after providing the irregularities was 23.5 g / m ² . In the surface sheet, the convex portions 21 and the joint portions 25 (concave portions 22) are arranged in a staggered pattern, the height h of the convex portions 21 is 1.1 mm, and the bottom dimension of the convex portions 21 along the Y direction. L1 was 2.5 mm, the bottom part dimension L2 of the convex part 21 along the X direction was 3.0 mm, and the bottom area of the convex part 21 was 7.5 mm ² . Further, the length L3 in the X direction and the length in the Y direction of the joint portion 25 of the concave portion 22 were 1.0 mm.

Next, the absorbent body 4 will be described in detail. The block-shaped region 411 of the absorbent core 41 has a total length in the Y direction of 332 mm and a total width in the X direction of 50 mm. The non-blocking region 412 of the absorbent core 41 has a Y direction length of 370 mm at the end in the Y direction, a length of the side of the ventral side A in the X direction of 120 mm, and the crotch C side. The length in the X direction of the portion was 70 mm, and the length in the X direction of the side portion of the back side portion B was 100 mm. The length L4 in the Y direction of the high basis weight portion 43 constituting the block shape region 411 was 20 mm, and the length L5 in the X direction was 10 mm. The width L6 of the horizontal groove 44X constituting the block-shaped region 411 was 32 mm, and the width L7 of the vertical groove 44Y was 2 mm. The basis weight of the low basis weight portion 44 (horizontal groove 44X, longitudinal groove 44Y) constituting the block shape region 411 is 292 g / m ² , and each of the high basis weight portion 43 and the non-block region 412 constituting the block shape region 411 is provided. The basis weight was 570 g / m ² .

Next, the adhesive 5 will be described in detail. The coating density (coating amount) of the skin-side absorbent core adhesive 51T coated in a spiral shape is 2.5 g / cm ³ , and is applied in a stripe shape. The coating density (coating amount) of the worked non-skin-side absorbent core adhesive 51U was 2.0 g / cm ³ .
[Example 2]
Example 2 is the disposable of Example 2 except that the width L6 of the horizontal groove 44X constituting the block-shaped region 411 is 2.5 mm and the width L7 of the vertical groove 44Y is 2 mm. A diaper was made.

[Comparative Example 1]
As for the absorbent core 41 of the absorbent body 4, the comparative example is the same as in Example 1 except that the width L 6 of the horizontal groove 44 X constituting the block-shaped region 411 is 1 mm and the width L 7 of the vertical groove 44 Y is 2 mm. One disposable diaper was prepared.

[Performance evaluation]
About the disposable diaper of Examples 1-2 and the comparative example 1, the absorption time and the diffusion area were measured according to the following method. The evaluation environment was a room temperature of 20 ° C. and a humidity of 60% RH. The measurement results are shown in Table 1 below.

[Measurement method of absorption time and diffusion area]
About the disposable diaper obtained in Examples 1 and 2 and Comparative Example 1, a top sheet and a cylinder (inner diameter 19.5 mm, upper part 10 mm in contact with the absorbent body) so as to correspond to the block shape region 411 of the absorbent core 41 The portion is brought into contact with the tip portion having an inner diameter of 10 mm), and the cylinder is set up vertically. Next, a weight is placed on the top sheet around the vertically standing cylinder so that a load of 21.6 g / cm ² is applied. Next, 30 g of physiological saline (0.9 wt% sodium chloride water) is supplied from the other end of the cylinder, and the absorption time (seconds) until the supplied physiological saline is not visible from the surface material in the cylinder is measured. Furthermore, the diffusion area (cm ² ) 10 minutes after the physiological saline was supplied was measured. In addition, three samples were measured for each diaper, and the average value of the measured values was determined and shown in Table 1.

As is clear from the results shown in Table 1, the disposable diapers of Examples 1 and 2 have a shorter absorption time (seconds) and a wider diffusion area (cm ² ) than the disposable diapers of Comparative Example 1. It was. Thus, compared with the disposable diaper of the comparative example 1, the disposable diaper of Example 1, 2 is estimated that the absorption capacity of the wide range of the absorber 4 can be utilized efficiently.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 21 Convex part 22 Concave part 23 1st layer, 24 2nd layer 25 Joint part 3 Back surface sheet 4 Absorbent body 41 Absorbent core 41T Absorbent core 41 flat skin opposing surface 41U Absorbent core 41 Non-skin facing surface 410 Layer of pulp alone 411 Block-shaped region 412 Non-blocking region 42 Coating material 421 Skin-side coating member 422 Non-skin-side coating member 43 High basis weight portion 44 Low basis weight portion 44X Extends in the lateral direction (X direction) Linear transverse groove 44Y Linear longitudinal groove 5 extending in the longitudinal direction (Y direction) Intermediate sheet 51U Non-skin-side absorbent core adhesive 6 Solid gather 61 Solid gather forming elastic member 62 Solid gather forming sheet 63 Leg elasticity Member 64 Waist elastic member 7 Fastening tape 8 Landing tape 9 Space 10 Adhesive 45 Absorbent material 46 Deposit 4 Absorber precursor 50 Rotating drum 51 Drum recess 52 Mesh plate 53 Breathable member 54, 55 Region 60 Duct 65 Vacuum box 70 Transfer roll 75 Mesh belt 80 Vacuum conveyor 90 Pressure means A Abdominal side, B Back side, C Crotch CL Centerline extending in the vertical direction of the diaper

Claims (7)

An absorbent article comprising a top sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorbent disposed between both the sheets,
The absorbent body has an absorbent core containing an absorbent polymer;
The absorbent core includes longitudinal grooves extending in the longitudinal direction of the absorbent article, transverse grooves extending in the lateral direction of the absorbent article, and the longitudinal grooves and the respective sections of the transverse grooves at the sections defined by the longitudinal grooves and the transverse grooves. It has a block-shaped region consisting of a plurality of vertically long high basis weight parts with a higher basis weight,
The longitudinal groove and the transverse groove have the same thickness at the bottom of the groove or the transverse groove is thinner, and the width of the transverse groove is wider than the width of the longitudinal groove in plan view.   The absorbent core has a flat skin-opposing surface side, a raised portion that protrudes from the top sheet side to the back sheet side on the non-skin facing surface side, and a hollow portion that is recessed from the back sheet side to the top sheet side. The absorbent article of Claim 1 in which is formed.   The absorbent core has the block-shaped region and a non-block region arranged over the outer periphery of the block-shaped region, and the entire width in the ventral side is the same as the total width in the dorsal side The absorptive article according to claim 1 or 2 whose width of said block shape field is the same in a stomach side part and a back side part.   The absorbent body has the absorbent core and a covering material that wraps the absorbent core, and the covering material and the non-skin facing surface of the absorbent core are joined by a non-skin-side absorbent adhesive. The absorbent article according to any one of claims 1 to 3, wherein the non-skin-side absorbent adhesive is applied intermittently in the transverse direction of the absorbent article and in a straight line in the longitudinal direction.   The absorbent article according to any one of claims 1 to 4, wherein the absorbent core has a pulp single layer formed on the most non-skin facing surface side.   The said surface sheet has many convex parts convex on the skin opposing surface side, and the recessed part adjacent to this convex part, The skin opposing surface side of this surface sheet has uneven structure. The absorbent article of Claim 1.   The absorbent article according to any one of claims 1 to 6, wherein a hydrophilic intermediate sheet is disposed between the absorbent body and the top sheet.

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