KR101766623B1 - Pants-type disposable diaper - Google Patents

Abstract

The pants-type disposable diaper 1A of the present invention is configured such that the topsheet 2 is disposed so as to cover the skin contact surface side, the both side edges 4e and the non-skin contact side of the side portions 4S of the absorbent body 4 The peripheries 6 and 6 are arranged on the abdomen side portion and the abdomen side portion so as to extend from the non-skin contact surface side of the absorbent main body 5 to the skin contact surface side, and the crotch portion 6, C). The absorbent main body 5 has a fixing portion 67 with respect to the through-bore cuff 6 at a portion distanced inward from the side edge 4e of the absorbent body 4. [ The topsheet 2 has an uneven region 2a in which convex portions are formed in the form of an acid spot on a portion of the absorbent body 4 that covers the skin contact surface side and covers the non- Portion is a flat non-irregular region 2b having no irregularities.

Description

Pants type disposable diaper {PANTS-TYPE DISPOSABLE DIAPER}

The present invention relates to a pull-on disposable diaper.

There is provided a disposable diaper comprising an absorbent main body including a liquid permeable top sheet and a liquid retaining absorbent body and an external body located at a non-skin contact surface side of the absorbent main body and fixing the absorbent main body, A pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side portions of the outer body in the back side and the side portions of the outer body in the back side to form a pair of side seal portions, a waist opening portion and a pair of leg openings.

In order to improve the throughput performance of such a disposable diaper, it is also possible to form a through-hole cuff that stands up by elastic members on both sides in the longitudinal direction of the absorbent main body in the crotch part and to cover the side of the non-skin- It is also known that a gap is formed between the seat and the through-flow cuff so as to store urine and the like (see Patent Document 1).

On the other hand, it is known to use a sheet having a concavo-convex shape as a top sheet of a disposable diaper or a sanitary napkin (see Patent Documents 2 and 3) in order to suppress the wet bag and improve the mounting feeling, Discloses that a corrugated sheet having a structure in which a sheet molded with a concavo-convex shape and a lower-layer sheet not formed in a concavo-convex shape are joined together in a concave portion of an upper layer sheet is used as a top sheet of a disposable diaper.

In the case of forming a through-bore cuff as described in Patent Document 1, the through-bore cuff is joined to the skin contact surface side of the absorbent main body so as to stand up in the crotch part, At the end, it is common to join the skin-contacting surface side of the absorbent main body.

In addition, as a conventional disposable diaper, there is a disposable diaper comprising an absorbent body including a liquid-permeable top sheet and a liquid-retaining absorbent body, and an external body located at a non-skin contact surface side of the absorbent body and fixing the absorbent body, And the pair of side seal portions, the waist opening portion, and the pair of leg openings, the pair of side seal portions, the waist opening portion, and the pair of leg openings, A disposable pull-on diaper is known.

It is also known to form waist circumferential gathers extending and contracting in the width direction of the diaper on the outer body of the front and rear waist regions in order to improve fitability of the wearer of the pull-on type disposable diaper (see Patent Documents 4 and 5 Reference).

Japanese Patent Application Laid-Open No. 2007-029482 Japanese Laid-Open Patent Publication No. 2009-148445 Japanese Laid-Open Patent Publication No. 2009-118921 Japanese Patent Application Laid-Open No. 9-84826 Japanese Patent Application Laid-Open No. 2003-38556 Japanese Laid-Open Patent Publication No. 2013-255561

According to the present invention (first invention), there is provided an absorbent body including a liquid-permeable topsheet and a liquid-retaining absorbent body, the body having a waist opening and a pair of leg openings, The present invention relates to a pull-on type disposable diaper. The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, the both side edges in the longitudinal direction of the absorbent body, and the non-skin contact side of both side portions in the longitudinal direction of the absorbent body. A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And is configured to stand on the crotch part in the wearing state. The absorbent main body has a fixing portion to a member on the side of the non-skin contact surface, at a portion separated from both longitudinal side edges of the absorbent body in the width direction of the absorbent body. Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion of the absorbent body covering the skin contact surface side, and a portion covering the non-skin contact surface side in both longitudinal side portions of the absorbent body , And a non-irregular region having no irregularities.

According to the present invention (second invention), there is provided an absorbent article comprising an absorbent main body having a liquid permeable top sheet and a liquid-retaining absorbent body, and an outer body located on the non-skin contact surface side of the absorbent main body and fixing the absorbent main body A waist opening and a pair of leg openings are formed on the back side of the disposable diaper. A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-air cuffs are bonded to the skin contact surface side of the absorbent main body in the abdomen side portion and the back side portion, In the crotch part of the crotch part. The topsheet has a convexo-concave region formed at the center in the width direction of the absorbent main body in the shape of an acid point, and has flat non-concavo-convex regions having no concavities and convexities at both ends in the width direction of the absorbent main body. The through-bore cuff has an inner joining portion and an outer joining portion bonded to the skin contact surface side of the absorbent main body on one or both of the abdominal side portion and the back side portion, And the outer joining portion is fixed on the non-irregular region in the vicinity of the end in the width direction of the absorbent main body. Wherein the inner joining portion and the outer joining portion are arranged in a width direction of the absorbent main body with a non-joined region that is not bonded on the topsheet, and the outer body has a diaper width The waist circumferential gathers in either or both of the front waist region and the back waist region have an inner stretchable portion overlapping the absorbent body. The outer joint portion and the non-joint region of the through-bore cuff overlap with each other in the diaper thickness direction. The disposable diaper according to the first aspect of the present invention is preferably provided with all or part of the constituent elements of the disposable diaper according to the second aspect of the invention or all or part of the constituent elements of the disposable diaper according to the embodiment Do.

According to the present invention (third invention), there is provided an absorbent article comprising an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body, and an external body located on the non-skin contact surface side of the absorbent main body and fixing the absorbent main body A waist opening and a pair of leg openings are formed on the back side of the disposable diaper. The absorber has a thin-walled portion at an end portion in the longitudinal direction which is located in the abdomen side portion or the back side portion. In the above-mentioned outer body, a plurality of waist elastic members are provided on the crotch side area of the abdomen side portion and the abdomen side portion in the longitudinal direction of the absorbent body along the width direction of the diaper Wherein at least one of the plurality of waist elastic members in the abdomen side portion or the abdomen side portion is disposed across the absorbent body in the diaper width direction and has a portion overlapping the thin portion. The topsheet has a concavo-convex shape. Wherein the position of the end edge in the longitudinal direction of the topsheet and the position of the end edge in the longitudinal direction of the absorbent article coincide with each other in the abdomen side portion or the back side portion where the thin portion is present, The contact surface side is covered by the end cover nonwoven fabric. The disposable diaper according to the first aspect of the present invention is preferably provided with all or part of the constituent elements of the disposable diaper according to the third aspect of the invention or all or part of the constituent elements of the disposable diaper according to the embodiment Do.

1 is a perspective view of a pull-on type disposable diaper which is one embodiment of the present invention (first invention).
Fig. 2 is an exploded plan view showing a developed state of the diaper shown in Fig. 1 and showing a state in which the diaper is viewed from the skin contact surface side. Fig. Also, the elongated state is released from the side seal portion and expanded, and the elastic members of each portion are stretched and spread in a plane.
3 is a cross-sectional view schematically showing a cross section along the widthwise center line CL of the diaper shown in Fig. 1 in a wearing state.
4 is a cross-sectional view schematically showing a cross-section taken along the line I-I in Fig.
5 is a cross-sectional view schematically showing a cross-section taken along a line II-II in Fig.
Fig. 6 is a perspective view showing the uneven region of the top sheet of the diaper shown in Fig. 1. Fig.
Fig. 7 is an explanatory view of a manufacturing method of the topsheet of the diaper shown in Fig. 1;
8 (a) to 8 (c) are schematic enlarged plan views showing another example of the convexo-concave region in which the convex portion is formed in an acid point on the surface sheet.
9 (a) to 9 (d) are explanatory views of a topsheet usable in the present invention (first invention), and Fig. 9 And Figs. 9 (b) to 9 (d) are cross-sectional views showing another example of a topsheet usable as a topsheet.
10 is an enlarged cross-sectional view of a main part taken along the width direction of a crotch part showing a main part of a pull-on disposable diaper according to another embodiment of the present invention (first invention).
Figs. 11A and 11B are explanatory diagrams for explaining a more preferable configuration of the pull-on type disposable diaper shown in Fig. 10 (an enlarged cross-sectional view of the main part taken along the width direction of the crotch part).
12 is a perspective view of a pull-on type disposable diaper which is one embodiment of the present invention (second invention).
Fig. 13 is an exploded plan view showing a state in which the diaper shown in Fig. 12 is also in a stretched state when viewed from the skin contact surface side. Fig. Also, the elongated state is released from the side seal portion and expanded, and the elastic members of each portion are stretched and spread in a plane.
14 is a cross-sectional view schematically showing a cross section along the widthwise center line CL of the diaper shown in Fig. 12 in a wearing state.
15 is a cross-sectional view schematically showing a cross-section taken along the line I-I in Fig.
16 is a cross-sectional view schematically showing a cross-section taken along the line II-II in Fig.
Fig. 17 is a perspective view showing the uneven region of the top sheet of the diaper shown in Fig. 12; Fig.
Fig. 18 is a view showing an example of the arrangement of the inner joining portion and the outer joining portion arranged in the width direction of the absorbent main body. Fig. 18 (a) is an arrangement in the diaper shown in Fig. 12, 18 (c) is a diagram showing an example of another arrangement that can be employed.
Fig. 19 is an exploded plan view showing a state in which the diaper shown in Fig. 12 is also in a stretched state when viewed from the non-skin contact surface side. Fig.
20 (a) to 20 (c) are schematic enlarged plan views showing another example of the convexo-concave region in which the convex portion is formed in an acid point on the surface sheet.
21 (a) to 21 (d) are explanatory views of a topsheet usable in the present invention (second invention), wherein Fig. 21 21 (b) to 21 (d) are sectional views showing another example of the surface sheet usable as the topsheet.
22 is a perspective view of a pull-on type disposable diaper which is one embodiment of the present invention (third invention).
Fig. 23 is an exploded plan view showing a state in which the diaper shown in Fig. 22 is in a stretched state when viewed from the skin contact surface side. Fig. Also, the elongated state is released from the side seal portion and expanded, and the elastic members of each portion are stretched and spread in a plane.
24 is a cross-sectional view schematically showing a cross section taken along the line III-III in Fig.
25 is a cross-sectional view schematically showing a cross section taken along the line IV-IV in Fig.
Fig. 26A is a view corresponding to Fig. 25 showing a contracted state, and Fig. 26B is a view corresponding to Fig. 26A in the case of a conventional product using a flat top sheet.
Fig. 27 is a perspective view of a three-dimensional sheet used as a top sheet of the diaper shown in Fig. 22;
28 is an explanatory diagram of a method of manufacturing the three-dimensional sheet shown in Fig.
29 is a schematic perspective view of a concavo-convex nonwoven fabric which can be preferably employed as a topsheet in the present invention (third invention).
30 is a schematic view showing a section along the thickness direction of the concavo-convex nonwoven fabric shown in Fig.
31 is a schematic view showing an apparatus preferably used for producing the concavo-convex nonwoven fabric shown in Fig.
32 is an enlarged view of a main part of a support in the production apparatus shown in Fig.
33 is a schematic diagram showing a state in which the web is formed by the manufacturing apparatus shown in Fig.
34 is a schematic view showing a state in which fibers of a web are thermally fused by the apparatus shown in Fig.
Fig. 35 is a plan view showing still another example of a concavo-convex nonwoven fabric which can be preferably used as a surface sheet in the present invention (third invention). Fig.
36 is an explanatory diagram of a measurement method of bulk softness.

The pull-on type disposable diaper disclosed in Patent Document 1 has a configuration that is difficult to absorb liquid from the non-skin contact surface side of the side of the absorbent body, and there is room for improvement in terms of improvement in mounting feeling and absorbing performance.

The inventors of the present invention have found that when a perforated cuff is bonded to a topsheet using a sheet having a concavo-convex shape as a topsheet, It is easy to be peeled off.

In addition, when the absorbent main body is bonded to the external body having the waist circumferential gathers formed thereon, the absorbent main body may be excessively reduced in the diaper width direction at the portion overlapping with the waist circumferential gathers to cause problems such as a sense of incongruity and lack of absorbed surface. Therefore, the elastic member for forming the waist-opening gathers is also cut at the portion overlapping with the absorber. However, when the elastic member for forming the waist-opening gathers is cut at a portion overlapping with the absorbent body, the fitability near the end portion of the absorbent body of the pull-on type disposable diaper is easily lowered, There is a danger of causing harm.

Patent Document 6 discloses that a part of a plurality of waist elastic members is arranged so as to overlap an end portion of an absorbent body. However, in Patent Literature 6, an absorbent core having a special absorbent core is used, and when a conventional absorbent core is used, wrinkles or kinks are formed at the end portion of the absorbent core, which may cause a discomfort to the wearer.

As described above, in the conventional pants-type disposable diaper, it is difficult to make both the pit and the absence of discomfort in the vicinity of the end of the absorber compatible.

The present invention relates to a pull-on disposable diaper capable of solving the problems of the prior art.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the first invention and the second invention of the present invention will be described with reference to the drawings based on preferred embodiments thereof.

The disposable diaper 1A according to the first aspect of the present invention (hereinafter, also referred to as "the diaper 1A") and the disposable diaper 1B according to the second aspect of the invention 1B ") is disposed on the non-skin contact surface side of the water absorbent main body 5 and the water absorbent main body 5, as shown in Figs. 1 to 3 or Figs. 12 to 14, 5 fixed to the outer casing 10. 2 or 13, the diaper 1A or 1B has a longitudinal direction X corresponding to the longitudinal direction of the wearer and a lateral direction Y perpendicular to the longitudinal direction X of the wearer, A crotch portion C disposed on the wearer's crotch portion and located between the abdomen side portion A and the abdomen side portion B and a back side portion B disposed on the back side of the wearer, ). The side edge portions B1 and B1 of the outer casing 10 in the side edge portions A1 and A1 of the outer casing 10 and the side edge portions B of the outer casing 10 of the front side portion A A pair of side seal portions S and S, a waist opening portion 7, and a pair of leg openings 8 and 8 are formed by known joining means such as a seal and an ultrasonic seal. The outer body 10 of the diaper 1A or 1B forms the outer surface of the diaper 1A or 1B.

The diaper 1A, the diaper 1A and the crotch part C are arranged in such a manner that the diaper 1A and the diaper 1B in a stretched state (see Fig. 2 or Fig. 13) And each region is divided into three regions to be equally divided. In addition, the extension state is a state in which the side seal portion is detached, the diaper is opened, the diaper in the unfolded state is stretched, and the elastic member of each portion is stretched so that when the diaper is spread in a planar state in a state of eliminating the influence of the elastic member (The same as the dimensions of the base). The widthwise center line CL of the diapers 1A and 1B is a virtual straight line extending in the width direction Y by bisecting the entire length in the longitudinal direction of the diaper 1A and 1B.

In this specification, the abutment surface of the skin is a surface facing the skin side of the wearer at the time of wearing the disposable diaper or its constituent member (for example, the absorbent main body), and the abutment surface Is a surface of the pull-on type disposable diaper or its constituent member which faces toward the wearer's skin side (wear side) when worn.

As shown in Fig. 2 or Fig. 13, the absorbent main body 5 has a longitudinally elongated shape elongated in the longitudinal direction X of the diaper 1A, 1B, and Fig. 3 to Fig. 5 or Figs. Permeable surface sheet 2 and a liquid-retaining absorber 4 as shown in Fig. The longitudinal direction of the absorbent main body 5 is aligned with the longitudinal direction X of the diaper 1A or 1B in a stretched state and is joined to the central portion of the external body 10 by a known bonding means As shown in Fig. The absorbent body 4 has a shape long in the longitudinal direction X of the diaper 1A and 1B like the absorbent main body 5.

As shown in Figs. 2 and 3, or Figs. 13 and 14, the absorbent core 4 of the diaper 1A and 1B is composed of the absorbent core 40 and the absorbent core 40, And a core wrap sheet 41 covering the non-skin contact side, and the absorbent core 40 is composed of a rectangular lower absorbent core 412 and an upper absorbent core 412 laminated on a part of the lower absorbent core 412 411). The absorbent core 40 has a central region 42 having a relatively thicker thickness because the upper absorbent core 411 is laminated on the lower absorbent core 412 at the center in the width direction of the crotch portion C And the upper absorbent core 411 is not laminated on the lower absorbent core 412 on both sides of the central region 42 and a pair of thin Side regions 43, The diaper 1A has a step d on the skin contact surface side of the absorbent body 4 at the boundary between the central region 42 and the side regions 43 and 43, respectively.

The upper absorbent core 411 and the lower absorbent core 412 in the absorbent body 4 of the diaper 1A or 1B are all made of a fiber aggregate or an absorbent polymer held in the fiber aggregate. The core wrap sheet 41 is made of a tissue paper or a water-permeable nonwoven fabric and covers the entirety of the absorbent core 40.

The lower absorbent core 412 has joint portions 44 and 44 that penetrate the lower absorbent core 412 on both sides of the overlapping portion of the upper absorbent core 411 in the crotch portion C . As shown in Fig. 3 or Fig. 14, in the joint portions 44 and 44, the ratio between the core wrap sheet 41 covering the skin contact surface side of the absorbent core 40 and the absorbent core 40 The core wrap sheets 41 covering the skin contact surface side are bonded to each other by known bonding means such as an adhesive 46. [

As shown in Figs. 3 to 5 or 14 to 16, the topsheet 2 of the diaper 1A, 1B has a structure in which a portion of the topsheet 2, which is disposed at the center in the width direction of the absorbent main body 5, (2b, 2b) having no concavities and convexities on both sides of the concavo-convex region (2a) between the convexo-concave regions (2a) The topsheet 2 has a rectangular shape and has a length over the entire length in the longitudinal direction of the absorbent main body 5. [ The uneven region 2a is formed at the central portion in the width direction of the topsheet 2, and non-irregular regions 2b and 2b are formed on both sides thereof. The uneven region 2a and the pair of non-uneven regions 2b and 2b all have a rectangular shape and are formed to extend over the entire length of the topsheet 2.

Here, with regard to the concavo-convex region, the convex portion is formed in the form of an acid point, and a plurality of convex portions are formed in any one direction and a cross direction (preferably orthogonal direction) Quot; means that they are arranged in a state having parts. It is preferable that the arbitrary one direction is in the same direction as the longitudinal direction X of the diaper. 6 or 17, the topsheet 2 according to the present embodiment has a plurality of convex portions 21 in one direction corresponding to the longitudinal direction X of the diaper 1A or 1B, The plurality of convex portions 21 are arranged in the state of having the concave portions 22a between the convex portions and in the cross direction corresponding to the width direction Y of the diapers 1A and 1B, And is provided with a concave portion 22a. Figs. 8 (a) to 8 (c) or 20 (a) to 20 (c) show another example of the uneven region 2a in which convex portions are formed in the form of an acid point. The concave portion between the convex portions 21 and 21 is not limited to being surrounded by the convex portion around the entire circumference, and the concave portion between the convex portions 21 and 21 is not limited to the convex portion as shown in Figs. 8A to 8C, The concave portion between the convex portions 21 and 21 may be formed continuously between all the convex portions as in the concave portion 22b shown in Fig.

As shown in Fig. 6 or Fig. 17, the uneven region 2a of the topsheet 2 has an upper layer sheet 22 formed in a concavo-convex shape and a lower layer sheet 23 not formed in a concavo- And the concave portion 22a of the upper-layer sheet 22 are bonded to each other. With respect to the lower layer sheet 23, it means that the lower layer sheet itself is not formed in a concavo-convex shape, which means that the process of imparting irregularities to the lower layer sheet itself is not performed. As a result, The case where the undersurface of the lower-layer sheet 23 is slightly deformed corresponds to " not formed in the concavo-convex shape ".

In the upper sheet 22 in this embodiment, the convex portions 21 are formed in a zigzag pattern. More specifically, the convex portion 21 and the concave portion 22a are arranged so as to alternate in a line in the diaper longitudinal direction X, and such heat is formed in multiple rows in the diaper width direction Y have. The positions of the convex portions 21 are shifted from each other in the diaper width direction Y by half a pitch in the diaper length direction X. [ Therefore, when one arbitrary concave portion 22a in one row is considered, the one concave portion 22a is a closed concave portion formed by being surrounded by the convex portions 21 in the front, rear, left and right sides thereof . In the topsheet 2 of the present embodiment, the concave portions 22a are also arranged in a zigzag manner in the same manner as the convex portions 21. [

The upper-layer sheet 22 is bonded to the lower-layer sheet 23 in the entire area or a part of the recess 22a. The upper sheet 22 is bonded to the lower sheet 23 in a part of the concave portion 22a so that the upper sheet 22 is bonded to one or more points in the concave portion 22a 3, or 4 points or more) of the lower layer sheet 23, as shown in Fig. For example, the upper-layer sheet 22 may be bonded to the lower-layer sheet 23 at four corners of a rectangular recess 22a in a plan view. The inside of the convex portion 21 is hollow.

The uneven region 2a has the following constitution from the viewpoint of improving the feeling of touch and improving the cushioning property and the viewpoint of suppressing the liquid migrating to the absorbent body 4 from retreating (wet back) to the skin-contacting surface desirable.

The convex portion 21 preferably has a height T1 (see Fig. 6 or Fig. 17) of preferably 0.1 mm or more, more preferably 0.2 mm or more, still more preferably 5 mm or less, mm or less, more specifically 0.1 mm or more and 5 mm or less, and more preferably 0.2 mm or more and 3 mm or less.

The thickness T2 (see Fig. 6 or Fig. 17) of the topsheet 2 at the portion having the convex portion 21 is preferably at least 0.2 mm, more preferably at least 0.5 mm, Is not more than 6 mm, more preferably not more than 4 mm, and more specifically not less than 0.2 mm and not more than 6 mm, and more preferably not less than 0.5 mm and not more than 4 mm.

The number of convex portions 21 per 10 cm 2 of the unevenness region 2a is preferably 20 to 200, more preferably 50 to 150.

6 or 17) of the convex portion 21 in the diaper length direction X is preferably 1.0 to 10 mm, more preferably 2.0 to 7.0 mm. It is preferable that the bottom dimension F (see Fig. 6 or Fig. 17) of the convex portion 21 in the diaper width direction Y is 0.5 to 5.0 mm, particularly 1.0 to 4.0 mm. 6 or 17) of the diaper longitudinal direction X is preferably 0.2 to 5.0 mm, particularly 0.5 to 3.0 mm, and the dimension of the diaper width direction Y (See FIG. 6 or FIG. 17) is 0.1 to 2 mm, particularly 0.2 to 1.0 mm.

As the sheet material constituting the upper and lower sheets 22 and 23, various sheet materials known as a material for forming a topsheet of an absorbent article such as a disposable diaper or a sanitary napkin can be used. However, It is preferable that the nonwoven fabric is a nonwoven fabric. As the nonwoven fabric, an air-through nonwoven fabric in which heat-fusion points of fibers are formed by air-through method on a fiber web obtained by a card method or an airlaid method, and a fiber web obtained by a card method are heat- Melt blown nonwoven fabric (S), melt blown nonwoven fabric (M), spunbond-meltbond composite nonwoven fabric (SM, SMS, SMMS and the like), spun lace nonwoven fabric, needle punch nonwoven fabric, air Various nonwoven fabrics such as a woven fabric, a raid nonwoven fabric, and a resin bond nonwoven fabric.

As the constituent fiber of the nonwoven fabric, a thermofusible fiber, particularly a fiber comprising a thermoplastic polymer material, is preferably used. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. Core-type conjugated fibers or side-by-side-type conjugated fibers comprising a combination of these thermoplastic polymer materials may also be preferably used. The nonwoven fabric may include fibers (for example, cotton fibers and the like) which do not have heat-sealability in addition to heat-sealable fibers as constituent fibers.

The nonwoven fabric constituting the upper layer sheet 22 (sheet material forming the convex portion) preferably has a fineness of 0.1 to 5.0 dtex, more preferably 0.1 to 5.0 dtex, in view of forming the convex portion 21 having a soft and cushion- The fineness is 0.1 to 3.3 dtex. From the same viewpoint, it is preferable that the nonwoven fabric constituting the upper-layer sheet 22 (sheet material forming the convex portion) includes crimped fibers.

The non-irregular region 2b in the topsheet 2 consists only of the lower-layer sheet 23 extending from the uneven region 2a as shown in Fig. 9 (a) or Fig. 21 (a). The lower layer sheet 23 is preferably made of a material having a basis weight of from 5 to 20 parts by weight in view of ease of winding down the non-irregular region 2b toward the non-skin contact surface side of the absorbent body 4, Preferably 5 to 50 g / m 2, and more preferably 10 to 30 g / m 2. From the same viewpoint, the fineness of the constituent fibers when the lower layer sheet 23 is composed of nonwoven fabric is preferably 1 to 20 dtex, and more preferably 1.5 to 6 dtex. On the other hand, the basis weight of the topsheet 2 in the uneven region 2a is preferably 10 to 100 g / m 2, and more preferably 10 to 30 g / m 2.

The topsheet 2 used for the diapers 1A and 1B includes a belt-like lower layer sheet 23 having a width wider than that of the upper layer sheet 22 and having nonuniform areas 2b and 2b , A method of producing a topsheet for absorbent articles described in Japanese Patent Laid-Open Publication No. 2004-174234 and a method of producing a composite sheet described in Japanese Patent Laid-Open Publication No. 2008-106420 Can be produced.

7, the belt-shaped upper-layer sheet 22 is led out from the roll-shaped winding 22 'of the upper-layer sheet 22, and the roll-shaped winding 22 of the lower- Shaped lower layer sheet 23 from the lower layer 23 '. The upper sheet 22 is fed to a first roll 211 having a circumferential surface in a concavo-convex shape and a second roll 211 having a convexo-concave shape in engagement with the concavo-convex shape of the first roll 211, And the upper layer sheet 22 is concavely and convexly formed by engaging with the roll 212 and the engaging portion. While the upper layer sheet 22 having the concavo-convex shape is held by the suction on the circumferential surface of the first roll 211 while being concavo-convex, the upper layer sheet 22 is bonded to the upper layer sheet 22 The lower layer sheet 23 is superimposed on the upper layer sheet 22 positioned on the convex portion of the first roll 211 and the upper layer sheet 22 positioned on the convex portion of the first roll 211 only in the width of the upper layer sheet 22, . As a result, a belt-like topsheet (not shown) having uneven regions 2a at the center in the width direction and non-irregular regions 2b, 2b consisting of only the lower-layer sheet 23 extending from the uneven region 2a 2) is obtained. The belt-like topsheet 2 is introduced into the production line of the diaper 1A or 1B after being wound or introduced into the production line of the diaper 1A or 1B.

The upper-layer sheet 22 and the lower-layer sheet 23 are all preferably substantially non-stretchable. By using the non-stretchable sheet material, unevenness substantially conforming to the concavo-convex shape of the above-described first and second rolls can be formed in the upper-layer sheet 22, Irregularities of a desired shape can be stably and reproducibly formed in the uneven region 2a of the substrate 2. A substantially unstretchable sheet product means, for example, that the elongation limit is 105% or less, and in the elongation exceeding it, material breakage or permanent deformation occurs.

7, the upper layer sheet 22 and the lower layer sheet 23 are partially heated and pressed between the convex portion of the first roll 211 and the heat roll 213, And the concave portion 22a of the sheet 22 is bonded to the lower layer sheet 23. [ The method of manufacturing the topsheet 2 is not particularly described in the method of manufacturing the topsheet described in Japanese Unexamined Patent Application Publication No. 2004-174234 and the manufacturing method of the composite sheet disclosed in Japanese Patent Application Laid-Open No. 2008-106420 The same method can be used.

As shown in Figs. 3 to 5, the topsheet 2 of the diaper 1A is formed so as to cover the entire area of the abutment surface side of the absorbent body 4, both side edges 4e and 4e in the longitudinal direction of the absorbent body 4 Skin side abutment side in the longitudinally opposite side portions 4s and 4s of the absorber 4 and is provided at a portion covering the skin abutment side of the absorber 4, (2a). On the other hand, the portions 4r and 4r covering the non-skin contact side of the longitudinal side portions 4s and 4s of the absorber 4 are flat non-irregular regions 2b having no irregularities.

More specifically, at least the uneven region 2a of the topsheet 2 is formed on the center portion in the width direction of the absorbent body 4, and preferably, in the abdomen side portion A or the back side portion B, Preferably at least 50%, more preferably at least 100%, of the width between the upper edge portions 6a, 6a of the through-bore cuffs 6, The pair of non-irregular regions 2b of the topsheet 2 are each wound on the side of the non-skin contact surface of the absorbent body 4 and the ratio And a skin contact surface is formed. The portion of the topsheet 2 positioned on the non-skin contact surface side of the absorbent body 4 extends from the longitudinally opposite side edges 4e of the absorbent body 4 inward in the width direction of the absorbent body 4 Directional cuff 6, as shown in Fig. A part of the peripheries cuff 6 is located on the non-skin contact surface side of the absorbent main body 5 in both of the abdomen side portion A, the back side portion B and the crotch portion C, Skin-contacting surface side of the absorbent body 4 on the surface sheet 2 is provided on the side-by-side cuff 6 (member on the non-skin contact surface side) positioned on the non-skin contact surface side of the main body 5 And the joint portion is joined to the end of the lower portion of the absorbent main body 5 according to the present embodiment by the fixing portion 67 for the member on the non-skin contact surface side ). That is, as shown in Fig. 3, the fixing portion 67 is formed at a portion separated from the side edges 4e in the longitudinal direction of the absorber 4 in the width direction in the width direction of the absorber 4 . For this bonding, known bonding methods such as heat sealing, ultrasonic sealing, and hot-melt type adhesives can be used. The distance from the side edge 4e of the absorbent article 4 to the fixing portion 67 in the width direction Y of the crotch part C is preferably 1 cm or more, more preferably 2 cm or more to be.

As shown in Figs. 2 to 5, the peripherical cuffs 6 are formed on both sides in the longitudinal direction of the absorbent main body 5 so as to extend in the longitudinal direction X of the diaper, respectively. The peripherical cuff 6 is provided with a perforated cuff forming sheet 60 and an elastic member 61 for standing up the perforated cuff in a stretched state in the vicinity of the upper side edge 6a of the peripheries cuff 6, And an intermediate elastic member 62 fixed in an elongated state at an intermediate portion between the upper edge 6a and the rising edge 6b of the through-bore cuff 6. The upper side edge portion 6a forms the free end of the through-bore cuff 6 erected toward the skin side of the wearer in the crotch portion C.

4 and 5, the leak-barrier cuff 6 is configured such that, in the abdomen side portion A and the back side portion B, the absorbent main body 5 is provided on the absorbent main body 5 from the non-skin- The portion of the absorbent main body 5 located on the non-skin contact surface side is fixed to the absorbent main body 5 in the fixing portion 67 described above and the absorbent main body 5 5 are fixed to the topsheet 2 forming the skin contact surface side of the absorbent main body 5 by known bonding means such as adhesives 68 and 69 have.

On the other hand, in the crotch part C in the wearing state, as shown in Fig. 3, the elastic member 61 is contracted so that the through-the-wall cuff 6 is erected toward the skin side of the wearer. In the crotch part C as well, as shown in Fig. 2, in the elongated state, the through-bore cuff 6 is arranged on the side of the skin-abutting surface side of the absorbent main body 5 And the portion of the absorbent main body 5 located on the non-skin contact surface side is fixed to the absorbent main body 5 in the fixing portion 67 described above.

The perforated cuff 6 is fixed in a state of extending from the non-skin contact surface side of the absorbent main body 5 to the skin contact surface side in the abdomen side portion A and the back side portion B, The upper side portion in the height direction of the through-the-wall cuff 6 is easily erected in a state of being inclined inward, and the anti-scattering effect by the through-hole cuff 6 is improved. The presence of the intermediate elastic member 62 makes it easy for the liquid P such as urine to flow into the gap between the non-skin contact surface side of both side portions of the water absorbent main body 5 and the through- Loses.

In the diaper 1A, one sheet-like water-repellent sheet having a predetermined width is folded in a folding line along the longitudinal direction so as to sandwich the layers facing each other as a hot-melt type adhesive or A two-layered sheet joined by a partial heat seal or an ultrasonic seal is used, and the elastic member 61 for standing the free standing cuff is fixed in a stretched state between the sheets of the two-layer structure.

A liquid impermeable sheet 3 made of a resin film and a perforated cuff 6 made of a perforated cuff 6 are formed on the skin contact surface side of the outer body 10 of the diaper 1A by an adhesive such as a hot melt adhesive, The forming sheet 60 and the absorbent main body 5 are successively bonded. With respect to the perforated sheet (3), liquid impermeability is a concept including liquid parasitivity.

As shown in Figs. 3 to 5, the outer body 10 of the diaper 1A of the present embodiment has two sheets for external body formation 11 and 12, And an elastic member of each part fixed in the state. The waist elastic members 71 forming the waist gathers on the periphery of the waist opening 7 and the waist elastic members 71 forming the waist gathers on the periphery of the waist opening 7 are provided on the periphery of the leg opening 8, The leg elastic members 81 forming the leg gathers and the waist portion D (the region from the position spaced apart by 20 mm downward from the peripheral edge of the waist opening 7 to the upper end of the leg opening 8) The waist-surrounding elastic members 91 forming the waist circumferential gathers in a state of being divided into left and right portions are joined and fixed in an elongated state by an arbitrary joining means such as a hot-melt type adhesive or the like. One or both of the sheets for external body formation 11 are folded back at the periphery of the waist opening 7 and the folded back portion is folded back and forth along the front and back of the absorbent main body 5 And is fixed to the skin contact surface side of the absorbent main body 5 in the step.

According to the diaper 1A of the present embodiment, since the topsheet 2 has the uneven region 2a in which the convex portion is formed in the form of an acid point on the portion of the absorbent body 4 covering the skin contact surface side, And the liquid migrating from the topsheet 2 to the absorbent body 4 is hardly regressed to the skin-contacting surface, and the liquid return-preventing property is also excellent.

According to the diaper 1A of the present embodiment, it is possible to provide the diaper 1 with cuffs 6 standing upright in the crotch part C and also having the non-skin contact surface side on both sides of the absorbent main body 5, Between the cuffs 6, there is formed a gap S into which liquid P such as urine flows. Since the perforated sheet 3 is not disposed on the side of the non-skin contact surface of the absorbent body 4 on both sides of the absorbent main body 5, the absorbent body 4 is provided on both sides in the longitudinal direction It is also possible to absorb liquid from the non-skin contact surface side.

In addition, since the topsheet 2 has a flat non-irregular region 2b that does not have irregularities, the portion of the topsheet 2 that covers the skin contact surface side on both side portions in the longitudinal direction of the absorbent body 4, The absorbability of the liquid to the absorbent body 4 via the topsheet 2 is also good and the liquid flowing into the gap S is absorbed smoothly as compared with the case of the absorbent core 2a.

As described above, the diaper 1A of the present embodiment is excellent in absorbing performance and anti-slippery property in the crotch portion C, in addition to tactile feeling and liquid return prevention of the liquid absorbent surface in contact with the skin.

The surface sheet 2 is formed such that the thickness of the non-irregular region 2b is smaller than the thickness T2 of the irregular region 2a in view of the improvement in attracting of the liquid from the gap S side , Preferably not more than 60%, more preferably not more than 25%. The thickness referred to here is an apparent thickness and is measured by the following method.

[Method of Measuring Apparent Thickness]

A non-contact type laser displacement meter (Laser Head LK-G30, displacement meter LK-GD500 (trade name)) manufactured by Keith Co., Ltd. was used. The measurement site was cut out and used as a measurement sample. A plate adjusted so that a load of 0.05 kPa (0.5 g / cm 2) was applied to the measurement sample was placed and measured by the above laser displacement meter. Samples at three points were measured, and the average value was taken as an apparent thickness.

It should be noted from the same viewpoint that the absorbent core 40 and the core wrap sheet 41 and between the absorbent core 4 and the top sheet 2 in the both side portions of the absorbent core 5 and the non- ) Are preferably not bonded or partly bonded by a patterned adhesive so as not to impair the absorption performance. Examples of the pattern of the pattern coating include a pattern on a scattering point, a spiral pattern, an Omega character pattern, and a narrow stripe pattern.

3, the diaper 1A according to the present embodiment has a structure in which the side portions 4S of the absorbent article 4 are provided in the vicinity of both side edges 4e in the longitudinal direction of the absorbent article 4 A side elastic member 45 is disposed. The side elastic members 45 are disposed between the absorbent body 4 and the topsheet 2 in such a manner as to extend in the longitudinal direction X of the diaper and are provided on one side or both sides of the absorbent body 4 and the topsheet 2, Are fixed to both sides by a known fixing method such as an adhesive.

As shown in Fig. 3, the topsheet 2 of the diaper 1A according to the present embodiment has a structure in which the portion of the absorbent 4 having a predetermined width from the side edge 4e on the skin- Skin non abrasive area 2b and includes a portion where the side elastic members 45 are fixed or close to each other so that a portion of the absorbent article 4 covering the non- Is a non-rugged area 2b.

The shrinkage of the side elastic members 45 is unlikely to be impeded and the side portions 4S of the absorbent article 4 are prevented from shrinking as compared with the case where the side elastic members 45 are fixed or close to each other in the uneven region 2a. Is excellent in standability. Therefore, the ability of the liquid of the gap S between the non-skin contact surface side of both sides of the water-absorbent main body 5 and the through-air cuff 6 to catch the liquid absorbent is more excellent and the liquid leakage prevention property is further improved do.

The non-irregular region 2b on the skin contact surface side of the absorbent body 4 preferably has a width from the side edge 4e of the absorbent body 4 to the irregular region 2a of 5 mm or more, Preferably 10 mm or more, and is preferably 1/3 or less of the entire width of the absorber 4.

In the diaper 1A of the present embodiment, as described above, the absorbent article 4 has the stepped portion d between the central region 42 and the side region 43, The uneven region 2a covers the step difference d of the absorbent body 4 in the topsheet 2 as shown in Fig.

The convex-and-concave region 2a is easily deformed by being easily deformed by having the convex portion 21 on an acid point, and large wrinkles continuously extending in one direction are hardly generated, and adhesion with the absorber 4 is also easily maintained. Therefore, in the step (d), a gap is not easily formed between the absorber 4 and the topsheet 21.

In the present invention (first invention), the concavo-convex region of the topsheet may be composed of only one sheet formed in a concavo-convex shape, but as in the present embodiment, the concavo-convex region of the topsheet, It is preferable that the lower layer sheet which is not formed in the form of being bonded to each other in the concave portion of the upper layer sheet is improved in the cushioning property and the shape stability of the concavo-convex shape, From the same viewpoint, it is more preferable that the convex portions in the concave-convex region are arranged in a zigzag pattern in plan view.

Figs. 10 and 11A show main parts of a disposable diaper according to another embodiment of the present invention (first invention).

10, the absorbent core 4 is composed of an absorbent core 40 and a core wrap sheet (not shown) for covering the absorbent core 40, and the absorbent core 40 is composed of an absorbent core 40 And a joint portion 44 passing through the base 40. The uneven region 2a of the topsheet 2 is arranged so as to overlap with the joint portion 44 and the adjacent portions 44n and 44m thereof. The pitch P between the convex portions 21 and 21 is larger than the thickness t4 of the absorbent body 4 at the portions 44n and 44m adjacent to the joint portion 44. [

The adjacent portions 44n and 44m of the joint portion 44 are adjacent portions in the diaper width direction Y. For example, in each of both sides of the joint portion 44, ) Within the range of 5 mm or less. This joint portion 44 also has an absorbent core 40 having an upper absorbent core 411 superimposed on the skin abutment surface side of the lower absorbent core 412 and the lower absorbent core 412 similarly to the diaper 1A, The upper absorbent core 411 and the lower absorbent core 412 in the crotch part C are preferably formed on both sides of one side of the upper absorbent core 411 and the lower absorbent core 412, It is more preferable that the lower absorbent core 412 is formed as a joint portion 44 penetrating the lower absorbent core 412. The pull-on disposable diaper showing the main part in Fig. 10 can be the same as that of the above-described diaper 1A except that it is not specifically described.

If the thickness t4 of the absorber 4 in one or both of the adjacent portions 44n and 44m of the joint portion 44 is made larger than the pitch P between the convex portions 21 and 21, 21 are obliquely contacted with the corners of the side edge of the joint portion 44 so that the absorber 4 becomes a resistance against the force to be bent at the position of the side edge of the joint portion 44, Can be prevented from being excessively bent. The pitch P between the convex portions 21 and 21 is set to be larger than the thickness t4 of the absorbent body 4 in one or both of the portions 44n and 44m adjacent to the joint portion 44 The ratio (P / t4) is preferably 1.1 or more, more preferably 1.5 or more, and further preferably 10 or less, more preferably 5 or less. The pitch P between the convex portions 21 and 21 is preferably 2 mm or more and 20 mm or less and more preferably 3 mm or more and 10 mm or less and the thickness t4 of the absorber 4 is , Preferably not less than 1 mm and not more than 10 mm, and more preferably not less than 2 mm and not more than 7 mm.

The pitch P between the convex portions 21 and 21 is a distance between the same portions (center positions of the top portions) of the convex portions located closest to each other (see Figs. 8 and 10). The protruding portions located nearest to each other do not include mutually adjacent convex portions in the longitudinal direction X of the diaper.

The pitch P between the convex portions 21 and 21 is measured in a state in which tension is not applied to the surface sheet (natural state). The thickness of the absorbent body 4 is measured by observing the cut surface along the width direction of the diaper in a state in which no load is applied and preferably the distance from the side edge of the joint portion 44 is not less than 2 mm and not more than 10 mm or less is measured. The absorber having the constitution in which the absorbent core is covered with the core wrap sheet is also measured including the core wrap sheet portion.

10, the uneven region 2a of the topsheet 2 has a convex portion 21 (as shown in Fig. 11A), and the convex portion 21 And 21 is preferably at least one-half of the width W44 of the joint portion 44. Further, 11B is a view showing a case where the pitch P between the convex portions 21 is less than 1/2 of the width W44 of the joint portion 44. In Fig.

The number of the fold lines K of the topsheet 2 formed at the portion overlapping the joint portion 44 can be reduced if the pitch P is not less than 1/2 of the width W44, Excessive bending of the absorber 4 including the absorbent core 40 and the absorbent core 40 can be prevented.

From this viewpoint, the pitch P between the convex portions 21, 21 is preferably 0.5 or more, more preferably 0.8 or more, with respect to the width W44 of the joint portion 44 , Preferably not more than 1.5, more preferably not more than 1.2. The pitch P between the convex portions 21 and 21 is preferably 2 mm or more and 15 mm or less and more preferably 5 mm or more and 10 mm or less and the width W44 of the joint portion 44, Is preferably not less than 2 mm and not more than 20 mm, and more preferably not less than 8 mm and not more than 15 mm. When the width W44 of the joint portion 44 is not uniform in the longitudinal direction of the diaper, the width of the widest portion of the joint portion 44 is taken as the width W44 of the joint portion 44 .

The topsheet 2 of the diaper 1B has the above-described uneven region 2a at the center in the width direction of the absorbent main body 5 and is provided at both ends in the width direction of the absorbent main body 5, Convex regions 2b and 2b.

More specifically, as shown in Figs. 14 to 16, the topsheet 2 includes the entire region on the skin contact surface side of the absorbent body 4, both side edges 4e and 4e in the longitudinal direction of the absorbent body 4, Skin contact surface side in both longitudinal side portions 4s and 4s of the absorbent body 4 so as to cover the non skin contact surface side of the absorbent body 4 in the widthwise central portion of the absorbent body 4, And has the uneven region 2a described above at a portion covering the contact surface side. The concavo-convex region 2a of the topsheet 2 is preferably provided between the upper edge portions 6a and 6a of the peripheries 6 and 6 of the front and rear waist regions A and B, And has a width of more than 100% with respect to the width.

The topsheet 2 is bonded to the portions 2s and 2s covering the skin contact surface side of the absorbent body 4 at both ends in the width direction of the absorbent main body 5 with the above- Lt; / RTI > The pair of non-irregular regions 2b of the topsheet 2 in the present embodiment are respectively wound on the non-skin contact surface side of the absorbent body 4, Skin contact surface in the non-skin contact surface. That is, the topsheet 2 according to the present embodiment has a structure in which the portion covering the longitudinal side edge 4e of the absorbent body 4 and the longitudinally opposite side portions 4s and 4s of the absorbent body 4 The portions 4r and 4r covering the non-skin contact surface side of the non-skin contact surface side are flat non-irregularity areas 2b having no irregularities.

In the diaper 1B, a pair of through-air cuffs 6, 6 are formed on both sides of the absorbent main body 5 in the longitudinal direction.

As shown in Figs. 13 to 16, the through-bore cuffs 6 are formed on both sides in the longitudinal direction of the absorbent main body 5 so as to extend in the longitudinal direction X of the diaper. The peripherical cuff 6 is provided with a perforated cuff forming sheet 60 and an elastic member 61 for standing up the perforated cuff in a stretched state in the vicinity of the upper side edge 6a of the peripheries cuff 6, And an intermediate elastic member 62 fixed in an elongated state at an intermediate portion between the upper edge 6a and the rising edge 6b of the through-bore cuff 6. The upper edge portion 6a forms the free end of the through-bore cuff 6 standing up toward the skin side of the wearer in the crotch part C.

As shown in Figs. 15 and 16, in the peripheries of the absorbent main body 5 from the non-skin contact surface side of the absorbent main body 5 in the front waist region A and the back waist region B, Skin contact surface side of the absorbent main body 5 is fixed to the absorbent main body 5 at the fixing portion 67 and the absorbent main body 5 is fixed to the absorbent main body 5, Is fixed to the topsheet 2 forming the skin contact surface side of the absorbent main body 5 by a known joining means such as an adhesive 68. [

13 and Fig. 15 and Fig. 16 on the portion of the peripheries cuff 6 located on the skin-contact surface side of the absorbent main body 5 in each of the abdomen side portion A and the back side portion B, Has an inner joint 63 and an outer joint 64 joined to the skin contact surface side of the absorbent main body 5, as shown in Fig. More specifically, the through-bore cuff 6 has an inner joining portion 63 and an outer joining portion 64 in the vicinity of both ends in the longitudinal direction. The distance from the longitudinal end of the through-bore cuff 6 to each of the inner joining portion 63 and the outer joining portion 64 located in the vicinity thereof is within a range of 0 to 20 mm, for example.

On the other hand, in the crotch part C in the wearing state, as shown in Fig. 14, the elastic member 61 is contracted so that the through-the-wall cuff 6 is erected toward the skin side of the wearer.

As shown in Figs. 15 and 16, the inner joining portion 63 of the through-bore cuff 6 is fixed on the uneven region 2a in the vicinity of the center in the width direction of the absorbent main body 5, Specifically, it is fixed on the concavo-convex area 2a located on the absorber 4. The distance between the upper edge 6a of the through-bore cuff 6 which is a free end of the crotch part C in the inner joint part 63 is preferably 8 mm or less, more preferably 5 mm or less .

On the other hand, the outer joint portion 64 of the through-bore cuff 6 is fixed on the non-irregular region 2b in the vicinity of the end in the width direction of the absorbent main body 5, and more specifically, 4 on the non-concave / convex area 2b.

The inner joining portion 63 and the outer joining portion 64 are arranged so that the non-joined region 65 not bonded on the topsheet 2 is sandwiched between the inner joining portion 63 and the outer joining portion 64, (Y) of the absorbent main body (5).

The inner joining portion 63 and the outer joining portion 64 in this embodiment have the same length in the longitudinal direction X of the diaper as shown in Fig. 18 (a) In the embodiment in which the inner joining portion 63 and the outer joining portion 64 are arranged in the width direction of the absorbent main body 5 although the inner joining portion 63 and the outer joining portion 64 are lined up, Or 18 (c), the inner joining portion 63 and the outer joining portion 64 are disposed.

18 (b), the length of the inner joining portion 63 is longer than that of the outer joining portion 64, and the length of the inner joining portion 63 is longer than the length of the inner joining portion 63 63 and the outer joining portion 64 are preferably equal to or more than half the length L3 of the inner joining portion 63 in the length direction X of the diaper.

As shown in Figs. 14 to 16, the outer body 10 of the diaper 1B of the present embodiment is constituted by two sheets for external body formation 11 and 12, And is constituted by elastic members of fixed parts. A waist elastic member 71 for forming waist gathers at the periphery of the waist opening 7 and a waist elastic member 71 for forming waist gathers at the periphery of the waist opening 7 and leg gathers at the periphery of the leg opening 8 And the waist portion D (the region from the position spaced apart by 20 mm downward from the peripheral edge of the waist opening portion 7 to the upper end of the leg opening portion 8) The waist elastic members 91 forming the waist circumferential gathers 13 and 13 in the state of being in the elongated state are joined and fixed by an arbitrary joining means such as a hot melt type adhesive or the like. One or both of the sheets for external body formation 11 are folded back at the periphery of the waist opening 7 and the folded back portion is folded back and forth along the front and back of the absorbent main body 5 And is fixed to the skin contact surface side of the absorbent main body 5 in the step.

As shown in Figs. 15, 16, and 19, the waist circumferential gauges 13, 13 are formed in a state of being divided left and right respectively in the front waist region A and the back waist region B . As shown in Figs. 15 and 16, between the right and left waist circumferential gauges 13, 13 of the front waist region A and the back waist region B, Stretchable region n in which the external body 10 does not exhibit stretchability between the waist circumferential gauges 13 and 13 as the released piece 91n.

The left and right waist circumferential gauges 13 and 13 of the diaper 1B of the present embodiment have elasticity in the width direction Y of the diaper 1B by the waist elastic members 91, 15 and 16 and 19, the diaper 1B has an inner stretchable and contractible portion 13e which overlaps with the absorbent body 4 on the widthwise center side. The outer joining portion 64 and the non-joining region 65 of the through-bore cuff 6 described above overlap with the inner stretchable and contractible portion 13e in the diaper thickness direction. 13, the inner stretchable and contractible portion 13e of the gathers 13 according to the present invention (second invention) is configured such that when the diaper 1B is stretched and extended, And the outer joining portion 64 and the non-joining region 65 may be overlapped with the inner stretchable and contractible portion 13e when viewed in plan from the expanded and stretched diaper 1B. The outer joining portion 64 and the non-joining region 65 are formed so that the inner joining portion 63 and the outer joining portion 64 are located in the lateral direction of the absorbent main body 5, . It is preferable to overlap the plurality of elastic members 91 disposed on the inner stretchable and contractible portion 13e.

According to the diaper 1B of the present embodiment, the topsheet 2 is formed so that the convex portion is formed in an acid spot on a portion of the absorbent main body 5 that covers the skin contact surface side of the absorbent body 4 in the width- The liquid absorbing surface contacting with the skin is excellent in touch and the liquid migrating from the topsheet 2 to the absorbent body 4 is hard to retreat to the surface contacting with the skin, Excellent anti-reversion.

In the diaper 1B of the present embodiment, the diaper 1 is provided with the perforated cuffs 6 standing up in the crotch part C, Are fixed to the uneven region 2a and the non-uneven region 2b in the inner joining portion 63 and the outer joining portion 64 where the non-joining region 65 is formed therebetween.

Therefore, the width of the concavo-convex region 2a does not become too narrow with respect to the width between the air-tight cuffs 6, 6, and when the absorbent main body 5 expands and contracts with the extension and contraction of the inner expandable portion 13e And the noncontact region 65 of the through-bore cuff 6 is easily expanded and contracted so that the absorbent main body 5 in the inner joint portion 63 and the outer joint portion 64 of the through- The stationary state is stably maintained. Therefore, when the envelope cuff 6 is peeled from the side of the abutting surface of the absorbent main body 5 and the function of the through-hole cuff 6 is inhibited during manufacture, packing and filling in bags for packaging, Problems are also unlikely to occur.

As described above, in the diaper 1B of the present embodiment, the surface sheet has irregularities in a wide range and is excellent in touch feeling and liquid return prevention property of the liquid absorbent surface in contact with the skin, Deterioration or the like is also prevented.

The disposable diaper according to the present invention (second invention) is such that the inner joining portion 63 is formed on the absorbent article 4 (upper side) as in the diaper 1B of the present embodiment, And the outer joining portion 64 is preferably fixed on the non-irregular region 2b on the absorber 4. In this case, the outer joining portion 64 is preferably fixed on the uneven region 2a.

The gathers 13 are formed in a state of being divided in the width direction Y of the diaper so that the wrinkles and kinks Which is preferable from the viewpoint of making it difficult to occur.

It is preferable that the gathers 13 have the inner stretchable and contractible portions 13e from the viewpoint of stretching both sides of the absorber outward in the width direction and suppressing the twist of the absorber. It is also preferable that the inner stretchable and contractible portion is formed from the viewpoint that the elastic member 91 is stably cut.

As a method for fixing the inner joining portion 63 and the outer joining portion 64 of the through-bore cuff 6 to the topsheet 2, as well as the bonding with an adhesive, there are known methods such as heat sealing, high frequency sealing, However, it is preferable to use an adhesive for fixing the inner joint portion 63 and the outer joint portion 64 from the viewpoint of improving flexibility of the through-hole cuff 6. In the inner joining portion 63 and the outer joining portion 64, the bonding methods may be the same or different.

From the viewpoint of enhancing the bonding strength with respect to the non-irregular region 2b of the outer joint portion 64, or from the viewpoint of improving the liquid-absorbing property on the non-skin contact surface side of both side portions of the absorbent main body to be described later, The thickness of the non-irregular region 2b is preferably 60% or less, more preferably 25% or less, of the thickness T2 in the uneven region 2a. The thickness referred to here is an apparent thickness and is measured by the following method.

[Method of Measuring Apparent Thickness]

A non-contact type laser displacement meter (Laser Head LK-G30, displacement meter LK-GD500 (trade name)) manufactured by Keith Co., Ltd. was used. The measurement site was cut out and used as a measurement sample. A plate adjusted so that a load of 0.05 kPa (0.5 g / cm 2) was applied to the measurement sample was placed and measured by the above laser displacement meter. Samples at three points were measured, and the average value was taken as an apparent thickness.

When the adhesive is used for fixing the inner joining portion 63 and the outer joining portion 64, the basis weight of the adhesive for fixing the inner joining portion 63 is set to be larger than the basis weight of the adhesive for fixing the outer joining portion 64 In this case, the basis weight of the adhesive for fixing the inner joint portion 63 is, for example, 3 to 25 g / m < 2 >, and the outer side The basis weight of the adhesive for fixing the bonding portion 64 is set to 1 to 20 g / m 2. The basis weight of the two is preferably 1 g / m 2 or more, more preferably 2 g / m 2 or more and 5 g / m 2 or less, for example.

When an adhesive is used for fixing the inner joint portion 63 and the outer joint portion 64, the width W3 of the adhesive for fixing the inner joint portion 63 (length along the width direction of the absorbent main body, (See Fig. 18 (a)) is made to be wider than the width W4 (length along the width direction of the absorbent main body, see Fig. 18 (a)) of the adhesive for fixing the outer joint portion 64, ) Is more difficult to peel off. In this case, the ratio W3 / W4 of the width W3 of the adhesive for fixing the inner joint 63 to the width W4 of the adhesive for fixing the outer joint 64 is preferably 1.5 or more, 2 or more, preferably 1.5 or more and 10 or less, and more preferably 2 or more and 8 or less.

The width W5 of the non-bonding region 65 between the inner joint portion 63 and the outer joint portion 64 (length along the width direction of the absorbent main body, see FIG. 18A) Preferably not less than 5 mm, more preferably not less than 10 mm, further preferably not less than 5 mm and not more than 30 mm, and more preferably not less than 10 mm and not more than 25 mm.

As shown in Figs. 15 and 16, the through-bore cuff 6 of the diaper 1B is configured such that the non-skin abutment of the absorbent main body 5 in the abdomen side portion A and the back side portion B And is fixed so as to extend from the face side to the skin contact face side. Therefore, the through-the-wall cuff 6 in the crotch part C is easily raised in a state in which the upper part in the height direction is inclined inward, and the anti-scattering effect by the through-hole cuff 6 is improved. The presence of the intermediate elastic member 62 makes it easy for liquid P such as urine to flow into the gap between the non-skin contact surface side of both side portions of the absorbent main body 5 and the through- Loses.

In the diaper 1B, one sheet of water repellent sheet having a predetermined width is folded in a fold line along its longitudinal direction as a sheet 60 for forming a through-bore cuff, Or a partial heat seal or an ultrasonic seal. The elastic member 61 for standing the free standing cuffs is fixed in a stretched state between the sheets of the two-layer structure.

A liquid impermeable sheet 3 made of a resin film and a perforated cuff 6 made of a perforated cuff 6 are formed on the skin contact surface side of the outer body 10 of the diaper 1B with an adhesive such as a hot melt adhesive, The forming sheet 60 and the absorbent main body 5 are successively bonded. With respect to the perforated sheet (3), liquid impermeability is a concept including liquid parasitivity.

In the diaper 1B of the present embodiment, the diaper 1 is provided with the perforated cuffs 6 standing upright on the crotch part C and the side of the non-skin contact surface on both sides of the absorbent main body 5, Between the cuffs 6, there is formed a gap S into which liquid P such as urine flows. Since the perforated sheet 3 is not disposed on the side of the non-skin contact surface of the absorbent body 4 on both sides of the absorbent main body 5, the absorbent body 4 is provided on both sides in the longitudinal direction It is also possible to absorb liquid from the non-skin contact surface side.

In addition, since the topsheet 2 has a flat non-irregular region 2b that does not have irregularities, the portion of the topsheet 2 that covers the skin contact surface side on both side portions in the longitudinal direction of the absorbent body 4, The absorbability of the liquid to the absorbent body 4 via the topsheet 2 is also good and the liquid flowing into the gap S is absorbed smoothly as compared with the case of the absorbent core 2a.

Therefore, the diaper 1B of the present embodiment is more excellent in the absorbing performance and the barrier property in the crotch part C.

The absorbent core 40 and the core wrap sheet 41 on both sides of the absorbent core 5 and between the absorbent core 40 and the absorbent core 41 can be easily removed from the gap S, 4 and the non-uneven region 2b of the topsheet 2 are preferably not bonded or partially bonded by a patterned adhesive so as not to impair the absorption performance. Examples of the pattern of the pattern coating include a pattern on a scattering point, a spiral pattern, an Omega character pattern, and a narrow stripe pattern.

14, the diaper 1B according to the present embodiment is provided with the absorbent article 4 for absorbing the side portions 4s of the absorbent article 4 in the vicinity of both side edges 4e in the longitudinal direction of the absorbent article 4 A side elastic member 45 is disposed. The side elastic members 45 are disposed between the absorbent body 4 and the topsheet 2 in such a manner as to extend in the longitudinal direction X of the diaper and are provided on one side or both sides of the absorbent body 4 and the topsheet 2, Are fixed to both sides by a known fixing method such as an adhesive.

As shown in Fig. 14, the topsheet 2 of the diaper 1B of the present embodiment has the same structure as that of the diaper 1B in that the portion of the absorbent body 4 having a predetermined width from the side edge 4e on the skin- Skin non abrasive area 2b and includes a portion where the side elastic members 45 are fixed or close to each other so that a portion of the absorbent article 4 covering the non- Is a non-rugged area 2b.

The shrinkage of the side elastic members 45 is unlikely to be impeded and the side portions 4s of the absorbent article 4 are prevented from shrinking as compared with the case where the side elastic members 45 are fixed or close to each other in the uneven region 2a. Is excellent in standability. Therefore, the ability of the liquid of the gap S between the non-skin contact surface side of both sides of the water-absorbent main body 5 and the through-air cuff 6 to catch the liquid absorbent is more excellent and the liquid leakage prevention property is further improved do.

In the present invention (second invention), the concavo-convex region of the topsheet may be composed of only one sheet formed in a concavo-convex shape, but as in this embodiment, the concavo- Layer sheet which is not formed in the shape of a sheet is bonded to each other in the concave portion of the upper-layer sheet, the cushioning property and the shape stability of the concavo-convex shape are improved and the tactile feeling and liquid return- , It is more preferable that the convex portions in the concave-convex region are arranged in a zigzag pattern in plan view.

As the material constituting each part of the diaper 1A or 1B of the present embodiment, any material conventionally used in this technical field can be used without particular limitation. For example, as the perforated sheet (3), a liquid impermeable material or a water repellent material can be used. As the liquid impermeable material, a resin film, a laminate material such as a resin film and a nonwoven fabric, or the like can be used. As the water repellent material, a water repellent nonwoven fabric or the like can be used.

As the upper absorbent core 411 and the lower absorbent core 412, a fibrous aggregate or a fibrous aggregate and an absorbent polymer (a mixture of an absorbent polymer and a fiber material) may be used. Examples of the water absorbent polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked product, (starch-acrylic acid) graft copolymer, (isobutylene-maleic anhydride) Cargo, polyaspartic acid, and the like. Examples of the fibers constituting the absorbent core include hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers and cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide. Can be used. The water absorbent polymer and the fiber may be used individually or in combination of two or more.

As the sheet material used in the sheet for forming a peri-curv cuff, a single layer or multilayer water-repellent nonwoven fabric, a laminate such as a resin film and a nonwoven fabric, or the like can be used. From the viewpoints of flexibility and water resistance, non-woven fabrics having a multilayer structure composed of a spun bond and a melt blown, such as SM (spunbond-meltblown) nonwoven fabric and SMS (spunbond-meltbond-spunbond) nonwoven fabric, 12 g / m < 2 > is preferable. These sheet materials may be used as two sheets overlapping as in the case of the diapers 1A and 1B, or only a part of the portion where the elastic members 61 are arranged may be used as a two-layer structure.

As the material for forming the elastic members 61, 62, 71, 81, and 91, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, a yarn (yarn rubber or the like) having a cross section of a rectangular shape, a square shape, a circle shape or a polygonal shape or a string shape (flat rubber or the like) or a multifilament type yarn may be preferably used .

As the sheet for forming external bodies 11 and 12, various sheet materials conventionally used for this type of article can be used without particular limitation, but from the viewpoint of flexibility, a nonwoven fabric is preferable, and for example, , Heat roll nonwoven fabric, span lace nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric or the like, or a laminated nonwoven fabric of two or more layers. Alternatively, a sheet obtained by integrating the nonwoven fabric and the film may be used.

Hereinafter, the present invention (third invention) will be described with reference to the drawings based on its preferred embodiments.

22 and 23, the pull-on type disposable diaper 1C (hereinafter also referred to as "the diaper 1C") according to one embodiment of the present invention (the third invention) comprises an absorbent main body 5, And an external body (10) located on the non-skin contact surface side of the water absorbent main body (5) and fixing the water absorbent main body (5). 23, the diaper 1C has a longitudinal direction X corresponding to the longitudinal direction of the wearer and a lateral direction Y perpendicular to the longitudinal direction X. The diaper 1C is disposed on the bather side of the wearer when worn And a crotch portion C disposed between the abdomen side portion A and the back side B and disposed at the crotch portion of the wearer. The side edge portions B1 and B1 of the outer casing 10 in the side edge portions A1 and A1 of the outer casing 10 and the side edge portions B of the outer casing 10 of the front side portion A A pair of side seal portions S and S, a waist opening portion 7, and a pair of leg openings 8 and 8 are formed by a known joining means such as a seal, a high frequency seal, and an ultrasonic seal, have. The outer body 10 of the diaper 1C forms the outer surface of the diaper 1C.

In this specification, the skin contact surface is a surface facing the skin side of the wearer when worn, in the pull-on type disposable diaper or its constituent members (for example, the topsheet, the absorbent main body and the absorbent body) The abutment surface is a surface facing the wearer's skin side (garment side) when worn by the pull-on type disposable diaper or its constituent members. 23, the length direction of the diaper is a direction extending from the abdominal side part A to the back side part B via the crotch part C (in the X direction in the figure) in the unfolded and stretched diaper, ), And the longitudinal direction of the diaper is the same as the longitudinal direction of the absorbent main body and the absorbent body. In addition, the extension state is a state in which the side seal portion is detached, the diaper is opened, the diaper in the unfolded state is stretched, and the elastic member of each portion is stretched so that when the diaper is spread in a planar state in a state of eliminating the influence of the elastic member (The same as the dimensions of the base). The widthwise center line CL of the diaper 1C is a virtual straight line extending in the width direction Y by bisecting the entire length in the longitudinal direction of the diaper 1C.

As shown in Fig. 24, the absorbent main body 5 is provided with a liquid-permeable top sheet 2, liquid-impermeable sheet-like seams 3 and a liquid-retaining absorbent 4. With respect to the perforated sheet 3, liquid impermeability is a concept including liquid impermeability. 23, the absorbent main body 5 has a longitudinally elongated shape elongated in the longitudinal direction X of the diaper 1C, and the longitudinal direction thereof is parallel to the longitudinal direction X of the diaper 1C And is joined to a central portion of the external body 10 by known bonding means (adhesive or the like). Like the absorbent main body 5, the absorbent body 4 has a shape elongated in the longitudinal direction X of the diaper 1C.

23 and 24, the absorbent core 4 of the diaper 1C comprises an absorbent core 40 and a core wrap sheet 41 covering the absorbent core 40, The absorbent core 40 in the absorbent core 1C is made of a fiber aggregate or an absorbent polymer held in the fibrous aggregate. The core wrap sheet 41 is made of a tissue paper or a water-permeable nonwoven fabric and covers the entirety of the absorbent core 40. The absorbent core 40 has joint portions 44 and 44 penetrating through the crotch portion C in the thickness direction of the absorbent core 40 (see FIG. 22). A core wrap sheet 41 covering the skin contact face side of the absorbent core 40 and a core wrap sheet 41 covering the non skin contact face side of the absorbent core 40 are provided on the joint portions 44, Are bonded to each other by known bonding means such as an adhesive.

23 and 24, the absorbent body 4 of the diaper 1C has a thin-walled portion 421 at an end portion 4a in the longitudinal direction located at the side-wall portion A, And a thin-walled portion 43 is also provided at the end portion 4b in the longitudinal direction located at the side portion B.

In the diaper 1C of the present embodiment, in the thin portion 421 on the side of the folded portion A and the thin portion 43 on the side of the back portion B, Are the same. Therefore, the following description will mainly focus on the thin portion 421 on the side of the side portion A, but the description is also applied to the thin portion 43 on the side of the back portion B as well.

24 and 25, the thinner portion 421 of the absorbent core 4 on the diaper 1C side of the absorbent core 4 (the side of the absorbent core 4 of the upper and lower core wrap sheets 41, 41) (Pulp fiber or the like) of the absorbent core 40 is present between the upper and lower core wrap sheets 41, 41, and the first portion 42a composed of the portion extending from the double-side edge 40a of the absorbent core 40, And a second portion 42b whose amount is small. The thin portion 421 in the present invention (third invention) may be a portion made of only the core wrap sheet extending from the absorbent core like the first portion 42a, The absorbent core 40 may be composed of only the portion where the material for forming the absorbent core 40 is present in a trace amount between the wrap sheets.

The thin portion 421 is formed such that the total basis weight of the material forming the absorbent core existing between the core wrap sheets is preferably 30 g / m 2 or less, more preferably 10 g / m 2 or less, still more preferably 5 g / m 2 or less to be. The total basis weight of the forming material of the absorbent core means the sum of the basis weight of the fiber material and the basis weight of the water absorbent polymer when the absorbent core 40 is composed of the aggregate of the fiber material such as pulp fiber and the water absorbent polymer to be.

The basis weight of the material for forming the absorbent core (the fiber material and the water absorbent polymer) is set such that the absorbent body 4 in the abdomen side portion A or the back side portion B is divided into the longitudinal side edge 4e ) And the longitudinal direction parallel straight line orthogonal to the lateral parallel straight line arranged at intervals of 20 mm in the width direction of the diaper, And a basis weight is obtained for each individual micro area. The basis weight of each microdomain is obtained by dividing the weight of the material forming the absorbent core, which is present in each microdomain, by the area of 100 mm 2 of each microdomain, and converting the obtained value into a value per 1 m 2.

Side edges 40a of the absorbent core 40 are worn on the wearer's body when the diaper is worn or when the diaper is worn, from the viewpoint of preventing leakage or leakage of the forming material or polymer from the end of the absorbent body, 24 of the diaper length direction X is preferably 5 mm or more and more preferably 10 mm or more and the length L of the absorbent core 40 Is preferably 50 mm or less, more preferably 35 mm or less, from the viewpoint of fitting the absorbent core 40 to the body when worn, and the length in the longitudinal direction enough to cover the urination part of the wearer. The thin portion 421 of the diaper 1C is formed so as to extend in the width direction of the absorbent body 4. It is preferable that the thin portion 421 extends over the entire width of the absorbent body 4 at the end portion 4a of the absorbent body 4. [

As shown in Figs. 24 and 25, the outer body 10 of the diaper 1C of the present embodiment has two sheets for external body formation 15, 16, And elastic members (71, 81, 91) of the respective parts fixed in a state of being fixed. That is, between the two sheets of external body forming sheets 15 and 16, a waist elastic member 71 for forming a waist gathers, a waist elastic member 71 for forming a waist gathers Elastic members 91 for forming the waist circumferential gathers 9 and 9 in the waist circumferential region D and the waist circumferential elastic members 91 for forming the waist circumferential gathers 9 and 9 in the elongated state And they are bonded and fixed by an arbitrary bonding means such as a hot-melt type adhesive. 24, the waist region U is formed so as to be larger than the position of the end edge 4e in the longitudinal direction of the absorbent article 4 in the waist opening portion (the waist region U), in the abdomen side portion A and the abdomen side portion B, 7 and the waist circumferential region D is a region located in the longitudinal direction end edge 4e of the absorbent body 4 in each of the abdomen side portion A and the back side portion B, Is located on the crotch side.

More specifically, the waist region U is provided with a plurality of waist elastic members 71 spaced apart from each other in the longitudinal direction of the diaper, and the waist elastic members 71 thereof extend in the diaper width direction Y) and is fixed. In the waist region D, a plurality of waist elastic members 91 are arranged at intervals in the diaper longitudinal direction X, and the waist elastic members 91 of the waist elastic members 91 are arranged in the diaper width direction (Y) in a stretched state. 24 and 25, two waist elastic members 91a and 91b in the vicinity of the waist region U are arranged in such a manner that the waist elastic members 91a and 91b in the vicinity of the waist region U contact the absorbent body 4 in the diaper width direction Y, and has a portion overlapping with the thin portion 421. [ The two waist elastic members 91a and 91b are arranged over the entire length between the side seal portions 4 and 4 of the front waist region A or the back waist region B and the one waist elastic members 91a overlap with the first section 42a of the thin section 421 and the other waist elastic section 91b overlaps with the second section 42b of the thin section 421. [ The other waist elastic members 91c are formed in the left and right portions of the front waist region A and the back waist region B, respectively. The waist-surrounding elastic members 91c exist between the left and right waist circumferential gathers 9, 9 in each of the front waist region A and the back waist region B as fragments in which the stretched state is released have.

One or both of the sheets 15 and 16 are folded back at the periphery of the waist opening 7 and the folded back portion 17 is folded back on the absorbent main body 15, Is fixed to the skin-contact surface side of the absorbent main body (5) at the front and rear ends of the absorbent main body (5). In the diaper 1C, the folded-back portions 17 of the sheets 15, 16 for the external bodies are end cover nonwoven fabrics 17.

The end cover nonwoven fabric 17 covers the skin contact face side of the longitudinal end edge 2a of the topsheet 2 so that the end of the absorbent main body 5 and the topsheet 2 are bonded to the diaper 1C, Is prevented from being dried during the rubbing process.

In the diaper 1C, the above-described waist elastic members 91a and 91b are overlapped on the thin portion 421 of the absorbent body 4, so that the absorbent body 4, as shown in Fig. 26 (a) A force to reduce the diaper in the diaper width direction Y acts on the thin portion 421 of the diaper. Therefore, when the topsheet 2 is made of a flat non-woven fabric as shown in Fig. 26 (b), twisting and wrinkling occur in the thin portion 421 of the absorbent body 4. Since the thin portion 421 is located at the end portion in the longitudinal direction of the absorber 4, if a twist or a wrinkle is generated in the thin portion 421, the portion protruding toward the skin side of the wearer strongly contacts the skin of the wearer, It can also be the cause of feeling.

24, in the diaper 1C, in both of the side of the folded portion A and the side of the folded portion B, the position of the end edge 2a in the longitudinal direction of the topsheet 2 And the longitudinal edge 4e of the absorber 4 are aligned with each other. When the position of the end edge 2a of the topsheet 2 is matched with the position of the end edge 4e of the absorbent body 4, the liquid residue on the surface sheet of the urinated urine can be reduced even at the end of the absorbent body 4 However, on the one hand, the end edges 2a and 4e of the two are easily perceived as uncomfortable when worn.

Although the position of the end edge 3a in the longitudinal direction of the perforation sheet 3 is also matched, there is an advantage that urine urination can be prevented from seeping out. However, And the edge edges 2a, 4e, 3a of the perforation sheet 3 become more uncomfortable and are likely to be perceived.

On the other hand, in the present diaper 1C, the topsheet 2 has a concavo-convex shape and exhibits resistance to compression in the diaper width direction and exhibits good thickness recovery against compression in the thickness direction 26 (a), the surface sheet 2 reduces the degree of twist and wrinkle in the thin portion 421, so that the portion of the wearer's skin that protrudes toward the skin side is the skin of the wearer It is possible to prevent occurrence of an uncomfortable feeling due to touching. The end edge 2a of the topsheet 2 is also in a relatively soft state due to the resilience of the thickness of the topsheet 2 and the wearer is perceived to feel discomfort by the end edge 2a of the topsheet 2 .

Since the waist-surrounding elastic members 91a and 91b are superimposed on the end regions of the absorbent body 4, the vicinity of the end in the longitudinal direction of the absorbent body 4 in the diaper 1C is favorably provided to the wearer, And is also excellent in leak prevention.

According to the diaper 1C of the present embodiment, it is possible to make both of the pit in the vicinity of the end portion of the absorbent article 4 and the absence of discomfort in the absorbent article 4 to be compatible.

As described above, the topsheet used in the present invention (the third invention) is a sheet having a concavo-convex shape and exhibiting resistance to compression in the diaper width direction and exhibiting good thickness recovery against compression in the thickness direction Is preferable from the viewpoint that both the pit in the vicinity of the end portion of the absorbent article and the absence of discomfort in the diaper are satisfied.

Regarding resistance to compression in the diaper width direction, the surface sheet preferably has a bulk softness value of 0.22 N or more and 0.60 N or less, more preferably 0.25 N or more and 0.40 N or less to be.

The bulk softness value is measured as follows.

As shown in Fig. 36, a horizontally long rectangular test piece P having a diaper width direction Y of 30 mm and a diaper length direction X of 150 mm was cut from the top sheet, To prepare a cylindrical measurement sample S having a diameter of 45 mm. The overlapping widths of both end portions in the longitudinal direction of the test piece P are set to 8 mm, and the overlapping portions are bonded by an ultrasonic sealer to the upper and lower ends. Then, the obtained measurement sample S is read by using a compression tester, and the maximum load value indicated when the compression sample is compressed at the compression speed of 10 mm / min in the axial direction of the cylinder.

Regarding the thickness recoverability with respect to the compression in the thickness direction, the surface sheet preferably has a thickness recovery rate after being pressed for 1 minute under a load of 20 cN / cm 2, preferably 80% or more and 100% or less, more preferably 90% Or less.

The thickness recovery rate after being pressurized for 1 minute under a load of 20 cN / cm 2 is measured as follows.

(Laser Head LK-G30, displacement gauge LK-GD500 (trade name)) manufactured by KYENCE CO., LTD. A plate adjusted to have a load of 0.5 cN / cm2 was placed on a 5 cm x 5 cm rectangular sample cut from the surface sheet and measured with the above laser displacement meter. This value was taken as the initial thickness T1. Subsequently, a weight was placed on the plate, the sample was pressed at 20 cN / cm 2 for 1 minute, and released from the pressure. After 5 seconds from the release, the thickness was again measured with a laser displacement meter under the load of 0.5 cN / cm < 2 > This value was set as the thickness T2 at the time of recovery. The thickness recovery rate was obtained from the following formula.

Thickness recovery rate (%) = (T1 / T2) x 100

The surface sheet used in the present invention (third invention) has an absolute amount of deformation that can be deformed in addition to the compressive recovery in the thickness direction, so that from the viewpoint of further suppressing the uncomfortable feeling at the end of the absorbent body, Preferably not less than 0.7 mm, more preferably not less than 0.9 mm, and further preferably not more than 7.0 mm, more preferably not more than 5.0 mm, and more specifically not less than 0.7 mm and not more than 7.0 mm , More preferably not less than 0.9 mm and not more than 5.0 mm.

The thickness of the surface sheet was determined by the initial thickness T1 in the above-described measuring method as the thickness of the surface sheet.

27 is a perspective view showing the three-dimensional sheet 20 used as the topsheet 2 in the diaper 1C of the present embodiment.

The topsheet 22 and the bottomsheet 23 which are not formed in a concavo-convex shape are formed in concave portions 221a of the topsheet 22 as shown in Fig. As shown in Fig. With respect to the lower layer sheet 23, it means that the lower layer sheet itself is not formed in a concavo-convex shape, which means that the process of imparting irregularities to the lower layer sheet itself is not performed. As a result, When the undersurface of the lower-layer sheet 23 is slightly deformed, it corresponds to " not formed in a concavo-convex shape ".

In the upper sheet 22 in this embodiment, the convex portions 211a are formed in a zigzag pattern. More specifically, the convex portion 211a and the concave portion 221a are arranged so as to alternate in a line in the diaper longitudinal direction X, and such heat is formed in multiple rows in the diaper width direction Y have. The positions of the convex portions 211a of the adjacent rows in the diaper width direction Y are shifted by half the pitch in the diaper length direction X. [ Therefore, when one arbitrary concave portion 221a in one row is considered, the one concave portion 221a is a closed concave portion formed by being surrounded by the convex portions 211a in the front and back and the right and left sides thereof . In the topsheet 20 of the present embodiment, the concave portions 221a are also arranged in a zigzag manner in the same manner as the convex portions 211a.

The upper-layer sheet 22 is bonded to the lower-layer sheet 23 in the entire area or a part of the recess 221a. The upper sheet 22 is bonded to the lower sheet 23 in a part of the concave portion 221a so that the upper sheet 22 is bonded to one or more points in the concave portion 221a 3, or 4 points or more) of the lower layer sheet 23, as shown in Fig. For example, the upper-layer sheet 22 may be bonded to the lower-layer sheet 23 at four corners of the rectangular recess 221a in plan view. The inside of the convex portion 211a is hollow.

It is preferable that the region having the irregularities of the surface sheet 2 (hereinafter also referred to as the irregularity region) has the following constitution.

The convex portion 211a preferably has a height T1 (see Fig. 27) of preferably 0.1 mm or more, more preferably 0.2 mm or more, further preferably 0.7 mm or more, and further preferably 7 mm or less, More preferably not more than 5 mm, further preferably not more than 3 mm, and more specifically not less than 0.1 mm and not more than 7 mm, more preferably not less than 0.2 mm and not more than 5 mm, more preferably not less than 0.7 mm 3 mm or less.

The thickness T2 (see Fig. 27) of the topsheet 20 at the portion having the convex portion 211a is preferably 0.7 mm or more, more preferably 0.9 mm or more, and still more preferably 7 mm More preferably not more than 5 mm, and more specifically not less than 0.7 mm and not more than 7 mm, and more preferably not less than 0.9 mm and not more than 5 mm.

The number of convex portions 211a per 10 cm 2 of the unevenness region is preferably 20 to 200, more preferably 50 to 150.

The bottom dimension E (see Fig. 27) of the convex portion 211a in the diaper length direction X is preferably 0.5 to 5.0 mm, particularly 1.0 to 4.0 mm. The bottom dimension F (see Fig. 27) of the convex portion 211a in the diaper width direction Y is preferably 0.5 to 10 mm, particularly 1.0 to 7.0 mm. 27) of the diaper longitudinal direction X is preferably 0.1 to 5.0 mm, more preferably 0.2 to 3.0 mm, and the dimension H of the diaper width direction Y is preferably 0.2 to 3.0 mm, (See Fig. 27) is 0.1 to 5.0 mm, particularly 0.2 to 3.0 mm.

As the sheet material constituting the upper and lower sheets 22 and 23, various sheet materials known as a material for forming a topsheet of an absorbent article such as a disposable diaper or a sanitary napkin can be used. However, It is preferable that the nonwoven fabric is a nonwoven fabric. As the nonwoven fabric, an air-through nonwoven fabric in which heat-fusion points of fibers are formed by air-through method on a fiber web obtained by a card method or an airlaid method, and a fiber web obtained by a card method are heat- Melt blown nonwoven fabric (M), spun bond-meltbond composite nonwoven fabric (SM, SMS, SMMS, etc.), span lace nonwoven fabric, needle punch nonwoven fabric, air blown nonwoven fabric Various nonwoven fabrics such as a woven fabric, a raid nonwoven fabric, and a resin bond nonwoven fabric.

As the constituent fiber of the nonwoven fabric, a thermofusible fiber, particularly a fiber comprising a thermoplastic polymer material, is preferably used. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. The core-sheath type conjugated fiber and the side-by-side type conjugated fiber comprising a combination of these thermoplastic polymer materials may also be preferably used. The nonwoven fabric may include fibers (for example, cotton fibers and the like) which do not have heat-sealability in addition to heat-sealable fibers as constituent fibers.

The nonwoven fabric constituting the upper layer sheet 22 (the sheet material forming the convex portion) preferably has a fineness of 0.1 to 5.0 dtex, more preferably 0.1 to 5.0 dtex, in view of forming a convex portion 211a which is soft and cushion- The fineness is 0.1 to 3.3 dtex. From the same viewpoint, it is preferable that the nonwoven fabric constituting the upper-layer sheet 22 (sheet material forming the convex portion) includes crimped fibers.

A preferred method of manufacturing the topsheet 20 used for the diaper 1C is as follows. First, as shown in Fig. 28, the upper layer sheet 22 And the belt-shaped lower layer sheet 23 is led out from the roll-like winding 23 'of the lower layer-like sheet 23 different therefrom. The upper sheet 22 is fed to a first roll 211 having a circumferential surface in a concavo-convex shape and a second roll 211 having a convexo-concave shape in engagement with the concavo-convex shape of the first roll 211, And the upper layer sheet 22 is concavely and convexly formed by engaging with the roll 212 and the engaging portion. The lower layer sheet 23 is superimposed on the upper layer sheet 22 while the upper layer sheet 22 having the concavo-convex shape is held by the suction on the circumferential surface of the first roll 211 And the lower layer sheet 23 is bonded to the upper layer sheet 22 located on the convex portion of the first roll 211. [ Thus, a strip-like topsheet 20 is obtained. The belt-like topsheet 20 is introduced into the production line of the diaper 1C after being wound or introduced into the production line of the diaper 1C.

The upper-layer sheet 22 and the lower-layer sheet 23 are all preferably substantially non-stretchable. By using the non-stretchable sheet material, irregularities substantially conforming to the concavo-convex shapes of the above-described first and second rolls can be formed in the upper-layer sheet 22 in forming the concavo-convex shape having a desired dimension. A substantially unstretchable sheet product means, for example, that the elongation limit is 105% or less, and in the elongation exceeding it, material breakage or permanent deformation occurs.

28, the upper layer sheet 22 and the lower layer sheet 23 are partially heated and pressed between the convex portion of the first roll 211 and the heat roll 213, And the concave portion 221a of the sheet 22 is bonded to the lower layer sheet 23. [

In order to provide the top- and backsheets 2 with resistance to compression in the diaper width direction and excellent thickness recovery against compression in the thickness direction, it is preferable to have the following constitution.

When the first straight line extending in the longitudinal direction of the diaper is moved in the transverse direction of the diaper while the junction between the concave portion 221a of the upper-layer seat 22 and the lower-layer seat 23 is regularly arranged in the planar direction, The first maximum value, which is the maximum value of the total length of the joining portions (the first joining portions in the first straight line) of the straight line, and the second straight line extending in the diaper transverse direction, It is preferable that the second maximum value is larger than the first maximum value when comparing the second maximum value which is the maximum value of the total length of the joining portions (the joining portions on the second straight line) per a predetermined length.

It is further preferable that the total length of the joints formed on the line extending in the transverse direction of the diaper is larger than the total length of the joints that can be counted in all imaginary straight lines (inclined direction, all) other than the lateral direction.

The method of manufacturing the topsheet 20 is not particularly described in the manufacturing method of the topsheet disclosed in Japanese Unexamined Patent Application Publication No. 2004-174234 and the manufacturing method of the composite sheet described in Japanese Patent Laid-Open Publication No. 2008-106420 The same method can be used.

24, the end cover nonwoven fabric 17 is provided with convex portions 211a (not shown) of concavo-convex shapes of the topsheet 2 made of the three-dimensional sheet 20 shown in Fig. 27, And the portions of the convex portion 211a which are not bonded to the topsheet 2 are sandwiched between the portions of the convex portion 211a. The end cover nonwoven fabric 17 is bonded in this manner and the convex portion 211a of the topsheet 2 is sandwiched between the lower layer sheet 23 and the end cover nonwoven fabric 17, The compression resistance of the convex portion is improved by dispersing the pressure on the convex portions by relieving the pressure applied to the convex portions while assisting the deformation resistance of the topsheet 2 and improving the elasticity of the waist elastic members 91a , 91b to reduce the influence of the twisting due to the contraction due to the force of reducing the diaper in the width direction of the diaper and the influence of the wrinkles on the side of the skin contact surface. In addition, by relaxing the remaining twists and wrinkles, it is possible to reduce discomfort to the skin.

24, the end cover nonwoven fabric 17 includes a crotch side fixing portion 17a joined to the topsheet 2 by an adhesive, and an absorbent body (not shown) Side fixing portion 17c joined by a glue 19 to a member extending from the longitudinal edge 4e of the crotch portion side fixing portion 17a and the waist opening portion side fixing portion 17a, Bonded portion 17b which is not bonded to another member between the first and second connecting portions 17a and 17c. By forming the non-joined portion 17b, the unevenness generated in the end cover nonwoven fabric due to the contraction due to the gathers of the wedge opening side fixing portion 17c can be relieved, and the end cover nonwoven fabric on the upper end portion of the end edge 4e of the absorbent body has the degree of freedom It is possible to soften the texture of the skin.

The length L1 (see Fig. 24) of the non-joined portion 17b in the diaper length direction X is preferably 0.5 mm or more, more preferably 2 mm or more, and preferably 7 mm or less , More preferably not more than 5 mm, and more specifically not less than 0.5 mm and not more than 7 mm, and more preferably not less than 2 mm and not more than 5 mm.

The adhesive 18 joining the end cover nonwoven fabric 17 and the topsheet 2 may be continuously coated with a predetermined width. However, the end cover nonwoven fabric 17 and the topsheet 2 Or both, particularly the end cover nonwoven fabric 17, is preferable from the viewpoints of improvement in compression recovery property of the convex portion 211a of the topsheet 2 and reduction in discomfort caused thereby.

In the diaper 1C of the present embodiment, the topsheet 2 and the absorbent body 4 are also bonded to each other via a patterned adhesive, and the space between the absorbent body 4 and the anti- And are bonded with a patterned adhesive interposed therebetween. The adhesive 19 joining the end cover nonwoven fabric 17 and the sheet for forming an external body 15 is also bonded to one or both of the end cover nonwoven fabric 17 and the topsheet 2 and particularly to the end cover nonwoven fabric 17 ) Is coated with a pattern.

As the adhesives (for example, adhesives 18 and 19) used for bonding between the constituent members of the diaper 1C, various kinds of adhesives used for manufacturing this type of article can be used without particular limitation, and hot melt type adhesives Is preferably used.

Examples of the coating pattern of the pattern coating include a spiral pattern, a stripe pattern, a lattice pattern, a plurality of continuous OMEGA patterns arranged next to the self-letter, and a dot pattern in which the application portion of the adhesive is arranged on an acid spot have.

In the diaper 1C of the present embodiment, the gap between the perforated sheet 3 and the outer body 10, that is, between the absorbent main body 5 and the outer body 10, Respectively. The partial coating described here may be a pattern coating as described above, or may be continuously applied to a plurality of portions.

In the diaper 1C of the present embodiment, the waist-surrounding elastic members 91a and 91b, which are disposed across the absorbent body 4 in the diaper width direction and have a portion overlapping the thin portion 421, And two sheets of external body forming sheets 15, 16 sandwiching the respective waist elastic members 91 are bonded to the absorbent body 4 at one or both of them.

The diaper 1C of this embodiment has such a constitution, and it is possible to effectively reduce occurrence of twist and wrinkle on the skin contact portion formed of the end cover nonwoven fabric 17. [ In the present embodiment, the waist elastic members 91a and 91b are provided on both sides of the abdomen side portion A or the back side B which do not overlap with the absorber 4, And 16, respectively.

29 and 30 show a concavo-convex nonwoven fabric (hereinafter also referred to as a nonwoven fabric 10B of the second embodiment) that can be preferably used as a topsheet in the present invention (third invention).

29 and 30, the nonwoven fabric 10B of the second embodiment comprises a first surface 1a and a second surface 1b located on the opposite side to the first surface 1a, Have. The nonwoven fabric 10B is used by being used on the topsheet of the disposable diaper when the first surface 1a side is used toward the wearer's skin side and the second surface 1b side is disposed on the absorbent article side inside the absorbent article . Hereinafter, an embodiment in which the first surface 1a side of the nonwoven fabric 10B shown in the drawing is used toward the skin side of the wearer is considered, but is not limited to this.

The nonwoven fabric 10B uses an air-through nonwoven fabric as the nonwoven fabric 10B when the nonwoven fabric 10B is produced by a preferable method described below. The nonwoven fabric 10B has a single-layer structure or a multilayer structure in which a plurality of layers are laminated. The air-through nonwoven fabric refers to a nonwoven fabric manufactured through a step (preferably a step of penetrating) of a fluid having a temperature of 50 占 폚 or more, for example, a gas or a water vapor, onto a web or a nonwoven fabric, A nonwoven fabric prepared by adding the present process to a nonwoven fabric produced by another method, or a nonwoven fabric produced by a process after the present process or after the present process.

As shown in Figs. 29 and 30, the nonwoven fabric 10B has a plurality of first convex portions 11a projecting toward the first surface 1a side viewed from the plane of the nonwoven fabric sheet. The first convex portion 11a has an inner space 11K in which the second surface 1b side is opened. The nonwoven fabric 10B has a plurality of second convex portions 12a protruding toward the second surface 1b side opposite to the first surface 1a side. The second convex portion 12a has an inner space 12K in which the first surface 1a side is opened. The first and second convex portions 11a and 12a are alternately arranged successively along each of two different directions intersecting each other in plan view over the entire surface of the nonwoven fabric 10B, for example. As a specific example, the two different directions are an X direction which is one direction in different directions and another Y direction which is different from the X direction. 27 and 28, the convex portion viewed from the first surface 1a side is the first convex portion 11a, and the concave portion becomes the second convex portion 12a. Conversely, the convex portion viewed from the second surface 1b side is the second convex portion 12a, and the concave portion becomes the first convex portion 11a. Therefore, the first convex portion 11a and the second convex portion 12a are partly shared.

The first and second convex portions 11a and 12a have the portions 11T and 12T, respectively. The first and second convex portions 11a and 12a have annular wall portions 131 and 141 between the corners 11T and 12T and the openings 11H and 12H of the inner space. The portions 11T and 12T are formed in a truncated cone shape or a semi-spherical shape having a rounded portion.

The protruding shape of the first convex portion 11a is a semi-spherical shape in either case, while the protruding shape of the second convex portion 12a is a convex shape of the first convex portion 11a, A cone or a truncated cone with a rounded portion. In the nonwoven fabric 10B of the second embodiment, the first and second convex portions 11a and 12a are not limited to the above-described shapes and may have any protruding shape. For example, it is practically a variety of conical shapes (in the present specification, the conical shape means a cone, a truncated cone, a pyramid, a truncated pyramid, a comb or the like widely). In the nonwoven fabric 10B of the second embodiment, the first and second convex portions 11a and 12a have frusto-conical or hemispherical internal spaces 11K and 12K having a rounded portion similar to the external shape of the first and second convex portions 11a and 12a, .

The wall portion 131 located between the opening 11H of the first convex portion 11a and the first convex portion 11T of the first convex portion 11a is formed in the first convex portion 11a It has an annular structure. The wall portion 141 located between the second convex portion 12T of the second convex portion 12a and the opening 12H thereof is formed in the second convex portion 12a Thus forming a cyclic structure. The wall portion 141 shares a part with the wall portion 131 described above. The " annular shape " is not particularly limited as long as it forms an endless series of shapes as viewed from the plane of the nonwoven fabric 10B, and may be any shape such as a circle, an ellipse, a rectangle or a polygon as viewed from the plane of the nonwoven fabric 10B. From the viewpoint of preferably maintaining the continuous state of the nonwoven fabric 10B, a circular or elliptical shape is preferable. The term " annular shape " as a three-dimensional shape means any circular structure such as a cylindrical shape, a comb-cylindrical shape, an elliptical cylinder shape, a truncated conical shape, a truncated conical shape, a truncated conical shape, a truncated quadrilateral shape, From the viewpoint of realizing a continuous sheet state, a cylindrical shape, an elliptical columnar shape, a truncated conical shape, and a truncated conical shape are preferable.

The nonwoven fabric 10B having the first and second convex portions 11a and 12a formed as described above has no curved portion and is formed of a continuous curved surface as a whole. As described above, the nonwoven fabric 10B preferably has a continuous structure in the plane direction. &Quot; Continuous " means that there are no interrupted portions or small holes. However, fine holes such as gaps between fibers are not included in small holes. The small pore can be defined, for example, as a pore diameter of 1 mm or more in diameter of a circle equivalent.

In the nonwoven fabric 10B of the second embodiment, the fiber density of the constituent fibers differs in the thickness direction. Specifically, the fiber density is increased from the first convex portion 11T toward the second convex portion 12T. The fiber density is the mass of the fiber per unit volume of the nonwoven fabric 10B. Means that the fiber density is high and the amount of fibers present per unit volume of the nonwoven fabric 10B is large and the distance between fibers is small. The low fiber density means that the amount of fibers present per unit volume of the nonwoven fabric 10B is small and the distance between fibers is large. Therefore, the region where the fiber density is high has a high parental power, and the region with a low fiber density has a low parental power.

When the fiber density is observed along the thickness direction of the nonwoven fabric 10B, the fiber density of the first convex portion 11T is the lowest and the fiber density of the second convex portion 12T is the highest. The fiber density of the wall portions 131 and 141 located between the first convex portion 11T and the second convex portion 12T is determined by the fiber density of the first convex portion 11T, Is a middle value of the fiber density of the portion 12T. As described above, in the nonwoven fabric 10B, the fiber density is increased in the order of the first convex portion 11T, the wall portions 131 and 141, and the second convex portion 12T. Therefore, also in terms of the mother tube force, the first convex portion 11T, the wall portions 131 and 141, and the second convex portion 12T have higher moments in this order. In this case, the fiber density and the hairpin strength may increase continuously in the order of the first convex section 11T <the wall sections 131, 141 <the second convex section 12T, . In order to give such a gradient of fiber density to the nonwoven fabric 10B, the nonwoven fabric 10B may be produced according to the production method described below.

The specific value of the fiber density of the nonwoven fabric 10B is preferably not less than 30 / mm2, particularly not less than 50 / mm2 with respect to the first convex portion 11a, more preferably not more than 130 / Or less. For example, the fiber density of the first convex portion 11a is preferably not less than 30 / mm 2 and not more than 130 / mm 2, more preferably not less than 50 / mm 2 and not more than 120 / mm 2. On the other hand, the second convex portion 12a is preferably at least 250 / mm2, particularly preferably at least 270 / mm2, more preferably at most 500 / mm2, particularly preferably at most 480 / mm2. For example, the fiber density of the second convex portion 12a is preferably 250 / mm2 to 500 / mm2, more preferably 270/480 / mm2 or less. The fiber density of the first convex portion 11a is measured at a position near the center of the layer thickness T _{L1 in} the first convex portion 11a. The fiber density of the second convex portion 12a is measured at a position near the center of the layer thickness T _{L2 in} the second convex portion 12a. The method of measuring the fiber density is as follows.

[Method of measuring fiber density]

The cut surface of the nonwoven fabric portion was subjected to an enlarged observation (adjusted to a magnification capable of measuring 30 to 60 fiber cross sections; 150 to 500 times) using a scanning electron microscope, The number of sections of the cut fibers was counted. Next, the number of fibers per 1 mm 2 was converted into the number of sections, and this was regarded as the fiber density. The measurement was carried out at three points, and the average was taken as the fiber density of the sample. As the scanning electron microscope, for example, JCM-5100 (trade name) manufactured by Nippon Denshi Co., Ltd. can be used.

The total thickness (apparent thickness) of the nonwoven fabric 10B when viewed from the side of the nonwoven fabric 10B is defined as the sheet thickness T _S ), and the local thickness (substantial thickness) of the nonwoven fabric 10B curved with the unevenness is set as the layer thickness T _L (see FIG. 30). Sheet thickness (T _S) is, may be suitably adjusted according to the application, in the case of using the nonwoven fabric (10B) as a topsheet of a disposable diaper, 1 mm or more is more preferably 7 mm or less is preferable, and a range from 1.5 mm 5 mm Do. By setting the sheet thickness T _S in this range, the body fluid absorption rate at the time of use is fast, restoration of liquid from the absorber can be suppressed, and appropriate cushioning can be realized.

The layer thickness T _L may be different at each portion in the nonwoven fabric 10B and may be appropriately adjusted depending on the use. When the nonwoven fabric 10B is used as a topsheet of an absorbent article such as a diaper or sanitary napkin, the layer thickness T _L1 of the first convex portion 11T is preferably 0.1 mm or more and 3 mm or less, more preferably 0.4 mm or more More preferably 2 mm or less. The preferable range of the layer thickness T _L2 of the second convex portion 12T and the layer thickness T _L3 of the wall portions 131 and 141 is the same as the layer thickness of the first convex portion 11T. The relationship of each layer thickness (T _L1 , T _L2 , T _L3 ) is T _L1 > T _L3 > T _L2 . As a result, in the first convex portion 11a, particularly on the skin surface side, the fiber density is low and good skin feel can be realized. On the other hand, the second convex portion 12a has a high fiber density, is not crushed well, can be made into a nonwoven fabric which is excellent in cushioning performance and liquid absorption speed without being collapsed.

The sheet thickness T _S and the layer thickness T _L are measured in the following manner.

The sheet thickness (T _S ) was measured by using a thickness measuring instrument with a load of 0.05 kPa applied to the nonwoven fabric to be measured. A laser displacement meter manufactured by Omron Co. was used for the thickness measuring instrument. The thickness was measured at 10 points, and the average value thereof was calculated to be a thickness.

The layer thickness (T _L ) measurement method can measure the thickness of each layer by enlarging the cross section of the sheet to about 20 times by a digital microscope VHX-900 manufactured by Keian Corporation.

The interval between the first convex portion 11a and the second convex portion 12a closest to the position of the nonwoven fabric 10B viewed from the plane can be appropriately adjusted in accordance with the application and the distance between the surface of the disposable diaper 10B When used as a sheet, the thickness is preferably 1 mm or more and 15 mm or less, more preferably 3 mm or more and 10 mm or less. The basis weight of the nonwoven fabric 10B may vary depending on the specific use of the nonwoven fabric 10B. The basis weight of the nonwoven fabric 10B is preferably 15 g / m 2 to 50 g / m 2, g / m &lt; 2 &gt; or less.

An embodiment of the method for manufacturing the nonwoven fabric 10B of the second embodiment will be described with reference to Figs. 31 to 34. Fig. 31 shows a manufacturing apparatus 100 that is preferably used for producing the nonwoven fabric 10B. The manufacturing apparatus 100 is preferably used for producing an air-through nonwoven fabric.

As shown in Fig. 31, the manufacturing apparatus 100 has a support 110 for conveying the web 105 containing the heat-sealable fibers. The web 105 is fed to the surface of the support 110 by the feed conveyor as the feeding portion 121. [ The web 105 is formed by the support 110 and the web 105 which has been formed is separated from the support 110 and fed out in a predetermined direction by a guide roller serving as the guide 122. The support 110 has a drum shape. The support body 110 is rotatable about the rotation axis 110C. A driving device (not shown) is connected to the rotating shaft 110C. Details of the support 110 will be described later.

A first nozzle 111 for jetting the first hot air W1 and a second nozzle 111 for jetting the second hot air W2 are provided on the outer surface side of the support 110 in this order along the feeding direction of the web 105 112 are formed. The first nozzle 111 is provided with a heater 113. The first heated air W1 heated by the heater 113 is injected to the surface of the support 110 through the ventilating conveyor 123 having air permeability, for example, almost vertically.

An injection hole (not shown) is formed at the tip of the first nozzle 111. The injection holes preferably have a length in the machine direction MD of 1 to 20 mm and a length in the width direction CD of the web 105, Of the width or the width to which the shape processing is applied. The injection hole has a shape of a slit in a row or a row, a round hole in a row or a row, an elongated hole, and a zigzag or a parallel arrangement of the holes. Preferably, it has a slit shape in a row of 2 mm or more and 20 mm or less. The first hot air W1 is jetted at a uniform air velocity in the width direction of the surface of the web 105 because the injection hole of the first nozzle 111 is formed in this manner. Air, nitrogen or water vapor heated to a predetermined temperature by the heater 113 may be used for the first hot air W1. Preferably, air is used for cost containment.

The first hot air W1 sprayed from the first nozzle 111 is controlled by the heater 113 at a temperature at which the fibers of the web 105 are fused together in a state in which the concavo-convex shape is maintained. For example, when the constituent fibers of the web 105 are core-sheath type conjugated fibers having a low melting point component and a high melting point component having a melting point higher than that of the low melting point component, Is controlled by a hot air having a temperature of not lower than the melting point of the low melting point component of the fiber by 60 占 폚 and not higher than the melting point of the low melting point component by 15 占 폚. Preferably 50 ° C lower than the melting point of the low melting point component and is controlled to be 10 ° C higher than the melting point of the low melting point component. For example, when polyethylene having a melting point of 132 占 폚 is used as a low melting point component, the preferable temperature range is 82 占 폚 or higher and 142 占 폚 or lower, and more preferably 132 占 폚 or higher and 142 占 폚 or lower.

The wind speed of the first hot air W1 is appropriately adjusted. And is preferably controlled at an air velocity of 10 m / sec to 120 m / sec. If the wind speed of the first hot air W1 sprayed from the first nozzle 111 is too low, it is difficult to sufficiently carry the fibers because the fibers hardly follow the support body 110 and the fusion of the fibers is weakened. On the other hand, even if the wind speed is too high, it is difficult to form the web 105. Therefore, it is preferable that the wind speed of the first hot air W1 is in the above range. More preferably 20 m / sec to 80 m / sec, and particularly preferably 40 m / sec to 60 m / sec.

The aeration conveyor 123 feeds the web 105 along the surface of the support body 110 to the transfer side while sandwiching the web 105 between the support body 110 and the support body 110. Concretely, a belt 124 having air permeability, a plurality of rollers 125 for supporting the belt 124, and a driving device (not shown) for driving the belt 124 via, for example, a roller 125 . At least two rollers 125A and 125B of the plurality of rollers 125 are arranged on the surface of the support 110 so as to follow the belt 124 with the web 105 interposed therebetween. It is possible to prevent scattering and scattering of the web 105 caused by the first hot air W1 of the first nozzle 111 by the ventilation conveyor 123. [

The second nozzle 112 is provided with a heater 114. The second heated air W2 heated by the heater 114 is sprayed, for example, substantially perpendicularly to the surface of the support 110. [ An injection hole (not shown) is formed at the tip of the second nozzle 112. It is preferable to use a punching metal which is regularly opened in the width direction and the flow direction. The opening ratio is preferably 10% or more and 40% or less, and more preferably 20% or more and 30% or less. In this manner, the second hot air W2 is jetted at a uniform air velocity in the width direction of the surface of the web 105, since the injection hole of the second nozzle 112 is formed. Air, nitrogen, or steam heated by the heater 114 may be used for the second heated air W2. Preferably, cost-free air is used.

The second hot air W2 is heated by the heater 114 while the fibers of the web 105 are fused to each other to maintain the concavo-convex shape of the web 105 formed by the first hot air W1, And the temperature is controlled to be lowered. For example, when the constituent fiber of the web 105 is a core-sheath type conjugate fiber having a low melting point component and a high melting point component having a melting point higher than that of the low melting point component, Is controlled to a temperature not lower than the melting point of the low melting point component of the fibers of the web 105 and preferably not higher than the melting point of the low melting point component by 40 占 폚. More preferably not lower than the melting point of the low melting point component and not higher than the melting point by 20 占 폚 or lower, particularly preferably not lower than the melting point of the low melting point component and not higher than the melting point by 15 占 폚. For example, when polyethylene having a melting point of 132 占 폚 is used as a low melting point component, a more preferable temperature range is 132 占 폚 to 152 占 폚, particularly preferably 132 占 폚 to 147 占 폚.

The wind velocity of the second hot wind W2 sprayed from the second nozzle 112 is appropriately determined in consideration of its purpose. And is preferably controlled at an air velocity of not less than 1 m / sec and not more than 10 m / sec. If the wind speed of the second hot air W2 ejected from the second nozzle 112 is too low, the heat transfer to the fibers may not be sufficient, and the fibers may be hardly fused, and the fixing of the concavo-convex shape may become insufficient. On the other hand, if the wind speed is too fast, the fiber tends to become too dry due to heat. Therefore, it is preferable that the wind speed of the second hot wind W2 is in the above range. It is more preferably from 1 m / sec to 8 m / sec, and particularly preferably from 2 m / sec to 4 m / sec.

A suction portion 115 for sucking the first hot air W1 that has passed through the ventilation conveyor 123, the web 105 and the supporter 110 is disposed in the air blowing direction of the first nozzle 111. [ The suction unit 115 is connected to an exhaust unit 117 for exhausting the first hot air W1. A suction port 116 for sucking the second heated air W2 that has passed through the web 105 and the support body 110 is disposed in the air blowing direction of the second nozzle 112. To the suction portion 116, an exhaust device 118 for exhausting the second hot air W2 sucked is connected. It is possible to make a structure in which the length of any suction portion can be appropriately adjusted in the CD direction. By disposing the suction portions 115 and 116 as described above, the web is prevented from being disturbed due to splashing back of the air to be jetted, etc., and can be stably formed in a desired shape. Also, the drum periphery is prevented from becoming too hot, and the web 105 in contact with the drum 105 is prevented from being excessively fused and hardened. Further, the web 105 can be easily held on the support 110, and the web 105 can be easily transported. Also, considering the stabilization of the hot air temperature and the running cost of the utility, it is preferable to use the hot air circulatingly.

Fig. 32 is an enlarged view of a main part of the support 110 in the manufacturing apparatus 100 shown in Fig. The support 110 shown in Fig. 32 corresponds to a state in which the support 110 having the shape of the peripheral surface of the drum is formed into a flat plate in Fig. The support 110 has a base portion 110B made of a plate-like body. In the base 110B, a plurality of through-holes are formed, and the through-holes thereof serve as vent portions 110H, which are concave portions. The support member 110 has a plurality of protrusion upper portions 110T that rise from one surface of the base portion 110B. The projection upper portion 110T is located between adjacent vent portions 110H. The protrusion upper portion 110T and the vent portion 110H are alternately arranged along the direction A in one direction in the plane of the supporter 110. [ The protrusion upper portion 110T and the vent portion 110H are alternately arranged along the direction B which is another direction in the plane of the supporter 110. [ The direction A and the direction B are orthogonal. The distance d _A between the neighboring protrusion upper portion 110T and the vent portion 110H and the distance d between the neighboring protrusion upper portion 110T and the vent portion 110H, The distances d _B may be the same or different. The A direction coincides with the rotation direction of the support member 110 and the B direction coincides with the width direction of the support member 110. [ As described above, the support 110 has a concavo-convex structure on one surface of the base 110B.

The projection upper portion 110T has a shape in which the tip is tapered toward the tip, and a rounded portion is formed at the tip end. The projection upper portion 110T has, for example, a plate shape or a spindle shape. The height of the projection upper portion 110T can be appropriately set in accordance with the use, specifications, etc. of the nonwoven fabric 10B. The height H (see FIG. 32) of the projection upper portion 110T, that is, the height based on the upper surface of the base 110B is preferably not less than 3 mm and not more than 30 mm, more preferably not less than 3 mm and not more than 10 mm. The pitch of the projection upper portion 110T is preferably 6 mm or more and 15 mm or less, more preferably 6 mm or more and 10 mm or less in the A direction, more preferably 4 mm or more and 8 mm or less in the B direction Is not less than 4 mm and not more than 6 mm.

The vent 110H of the support 110 is composed of a plurality of openings formed in the support 110 and the aperture ratio thereof is preferably 20% or more and 45% or less with respect to the surface area of the support 110, Is set to 25% or more and 40% or less, more preferably 30% or more and 35% or less. By setting the opening ratio within this range, a sufficient irregular shape can be formed in the web 105, and the deterioration of the shape and the formation of fluff can be effectively prevented. The shape of the vent portion 110H can be, for example, a circular shape in plan view. However, the shape of the vent portion 110H is not limited to this, and other shapes, such as an ellipse, a polygon, or a combination thereof, may be employed.

Fig. 33 schematically shows a state in which the web 105 is formed by using the support 110. Fig. In Fig. 33, the illustration of the venting conveyor 123 is omitted. The first hot air W1 is ejected from the outer surface of the web 105 in a state in which the web 105 is placed on the support 110. [ The jetted first hot air W1 passes through the web 105 and again passes through the vent 110H of the support 110 and is sucked by the suction portion 115 (see Fig. 29). Thus, the first hot air W1 is sprayed to the web 105 in the air through manner.

A portion of the web 105 which is covered by two or more neighboring projecting portions 110T receives pressure by the injection of the first hot air W1 and is deformed downward. By this deformation, the projecting portion 11A is formed. The protruding portion 11A is a portion corresponding to the first convex portion 11a in the target nonwoven fabric 10B. In the projecting portion 11A, the closer to the lowest portion, the greater the degree of deformation due to the pressure caused by the jetting of the first hot air W1. As a result, the inter- It grows. In other words, the fiber density is reduced.

On the other hand, the portion of the web 105 supported by the protrusion upper portion 110T is prevented from being downwardly deformed by the restriction by the protrusion upper portion 110T even when the pressure is applied by the injection of the first hot air W1 . As a result, the portion supported by the projection upper portion 110T becomes a convex shape extending downward toward the lower side. This convex portion is a portion corresponding to the second convex portion 12a in the target nonwoven fabric 10B. At the highest position of the convex portion, the inter-fiber distance becomes smaller. In other words, the fiber density becomes large. On the other hand, at the bottom side position of the convex portion, the web 105 is deformed, so that the inter-fiber distance becomes larger than the first convex portion 11a. In other words, the fiber density is reduced. However, the fiber density of the projecting portion 11A (see Fig. 33) described above does not become smaller.

34 shows a state in which the target nonwoven fabric 10B is obtained by spraying the second heated air W2 onto the formed web 105 and fusing the intersections of the constituent fibers. The injection of the second heated air W2 is carried out by the air through method.

In the diaper 1C, a pair of through-flow cuffs 6, 6 are formed on both sides of the absorbent main body 5 in the longitudinal direction.

As shown in Fig. 23, the through-bore cuffs 6 are formed on both sides in the longitudinal direction of the absorbent main body 5 so as to extend in the longitudinal direction X of the diaper. Each of the through-bore cuffs 6 has a sheet 60 for forming a through-bore cuff and elastic members 61 for standing up the bare cuffs in a stretched state in the vicinity of the upper edge of the through-bore cuff 6, respectively. The upper edge portion 6a forms the free end of the through-bore cuff 6 standing up toward the skin side of the wearer in the crotch part C. The perforated cuff 6 is arranged on the skin contact surface side of the absorbent main body 5 from the non-skin contact surface side of the absorbent main body 5 in the abdomen side portion A and the back side portion B, The portion of the absorbent main body 5 located on the skin contact surface side is joined to the end cover nonwoven fabric 17.

As the material constituting each part of the diaper 1C, any material conventionally used in the technical field can be used without particular limitation. For example, as the material for forming the perforated sheet 3, the absorbent core 40, the sheet material used for the perforated cuff forming sheet, and the elastic members 61, 62, 71, 81, and 91, , 1B) can be used.

As the sheet for forming external surfaces 15 and 16, various sheet materials conventionally used for this type of article can be used without particular limitation, but from the viewpoint of flexibility, they are preferably nonwoven fabrics. For example, , Heat roll nonwoven fabric, span lace nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric or the like, or a laminated nonwoven fabric of two or more layers. Alternatively, a sheet obtained by integrating the nonwoven fabric and the film may be used. As the end cover nonwoven fabric 17, various known nonwoven fabrics can be used. For example, a monolayer nonwoven fabric composed of an air-through nonwoven fabric, a heat roll nonwoven fabric, a span lace nonwoven fabric, a spunbond nonwoven fabric, And a laminated nonwoven fabric.

While the first invention, the second invention and the third invention of the present invention have been described based on a plurality of preferred embodiments thereof, the first invention, the second invention and the third invention of the present invention are limited to the above- It is not.

For example, the absorbent core may be composed of only the lower layer absorbent core of the above-described diapers 1A and 1B, and the joint portion 44 may be eliminated from the lower layer absorbent core. It is also possible to laminate a small upper absorbent core such as the upper absorbent core 411 of the diapers 1A and 1B on the lower absorbent core without the joints 44, . It is also possible to form a deep and shallow portion in the concave portion for the enemy island of the known red sanding apparatus and deposit a core forming material such as pulp fibers in the concave portion for the red sand to form a thick central region and a thicker An absorbent core having a thin side region may be formed.

The core wrap sheet 41 may be a single continuous sheet and may cover the skin contact surface side and the non-skin contact surface side of the absorbent core 40, and the skin contact surface side of the absorbent core, The non-skin contact side may be coated with a combination of two core wrap sheets.

The topsheet 2 is formed such that the entire upper region of the topsheet 2 is the uneven region 2a and the entire lower region of the topsheet 2 is the non-uneven region 2b with the arrangement of the side elastic members 45 as a boundary It may be.

As shown in Fig. 9 (a) or 21 (a), the non-irregular area 2b in the topsheet 2 is formed by only the lower sheet 23 extending from the rugged area 2a As shown in Fig. 9 (b) or Fig. 21 (b), the upper and lower sheets 22 and 23 extending from the uneven region 2a may be used. 21 (c), or only the upper-layer sheet 22 extending from the uneven region 2a as shown in Fig. 21 (c). 9 (d) or 21 (d), a portion having a three-dimensional shape and a portion having no three-dimensional shape are formed on one sheet 22, (2a) and a non-irregular region (2b) may be formed.

Further, in the second invention of the present invention, for example, the periarous cuff 6 may not have a portion located on the skin contact surface side of the absorbent main body 5. [ The through-bore cuff 6 may have an inner joining portion 63, an outer joining portion 64, and a non-joining region 65 therebetween in only one of the abdomen side portion A and the back side portion B . The wall-to-wall cuff 6 is formed so that only a part of the entire width of the non-bonded region 65 (the length in the width direction of the absorbent main body 5) near the outer joint portion 64 overlaps with the inner stretchable portion 13e Or the entire width of the non-joined region 65 may overlap the inner stretchable and contractible portion 13e. In addition to the outer joint portion 64 and the non-joint region 65, the inner joint portion 63 may overlap the inner extensible portion 13e.

In the third invention of the present invention, for example, the absorber 4 may have a thin-walled portion in only one of the front-side portion A and the back-side portion B. In addition, even in the case of having a thin portion in both the side portion A and the side portion B, only one of the thin portions may have the waist-surrounding elastic member 91 overlapping the thin portion. The number of waist-surrounding elastic members 91 overlapping with the thin portion 421 may be one, or may be three or more.

The end cover nonwoven fabric 17 is provided with a sheet 15 positioned on the absorbent main body 5 side among the two sheets 15, 16 for external body formation that sandwich the waist elastic member 91 therebetween Or may be a separate sheet from the sheets 15, 16 for external body formation.

In the third invention of the present invention, the concave-convex nonwoven fabric 10C (hereinafter referred to as the nonwoven fabric 10C of the third embodiment) shown in Fig. 35 may be used as the topsheet. The nonwoven fabric 10C of the third embodiment has a single-layer or multi-layer nonwoven fabric formed by heat embossing to form a heat-sealed portion 32 in a predetermined pattern by heat embossing, A plurality of convex portions 31 surrounded by the thermally fused portion 32 of the wearer's skin are formed in a raised state toward the skin side of the wearer. The convex portion 31 is formed in a staggered shape in a plan view of the concavo-convex nonwoven fabric 10C, and the periphery thereof is surrounded by the concave portion 33. [ The heat fusion portion 32 is present at the bottom of the concave portion 33.

As the nonwoven fabric constituting the unevenness nonwoven fabric 10C, various known nonwoven fabrics can be used. For example, a single-layer nonwoven fabric made of an air-through nonwoven fabric, heat roll nonwoven fabric, spunlaced nonwoven fabric, spunbond nonwoven fabric, A laminated nonwoven fabric of two or more layers, and the like. The nonwoven fabric 10C of the third embodiment also preferably has a bulk softness value of not less than 0.22 N and not more than 0.60 N in the diaper width direction and a thickness recovery rate of not less than 75% after being pressed for 1 minute under a load of 20 cN / Accordingly, the same effect as that of the above-described diaper 1C can be obtained.

Further, in the second invention of the present invention, the absorbent core may have a two-layer structure or may not have the joint portion 44. The core wrap sheet 41 may be a single continuous sheet and may cover the skin contact surface side and the non-skin contact surface side of the absorbent core 40, and the skin contact surface side of the absorbent core, The non-skin contact side may be coated with a combination of two core wrap sheets.

The topsheet includes thermoplastic fibers and has a first side and a second side opposite to the first side, wherein at least the first side includes a plurality of projections protruding from the first side, And the convex portion may be formed of thermoplastic fibers having fiber fusion points thermally fused at the intersections of the thermoplastic fibers with each other. It is preferable that the concave-convex nonwoven fabric is used so that the first surface side forms a skin contact surface that faces the wearer's skin side.

It is to be noted that the description omitted in the embodiment described above and the requirements of only one embodiment can be suitably applied to the different embodiments, and the requirements in the respective embodiments are appropriately applied to the embodiment Can be replaced with each other.

In addition to the above-described embodiment of the present invention, the following appendix (pants-type disposable diaper) is disclosed.

<1>

1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-

The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,

A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,

The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,

Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Wherein the non-concave region is a non-concave region.

&Lt; 2 &

The pull-on disposable diaper according to the above-mentioned &lt; 1 &gt;, wherein a side elastic member for standing a side portion of the absorbent body is disposed in the vicinity of both side edges in the longitudinal direction of the absorbent body.

&Lt; 3 &

Side elastic members for raising the side portions of the absorber are disposed in the vicinity of both side edges in the longitudinal direction of the absorber, and the surface sheet is sandwiched from a portion covering the non-skin contact surface side of the absorber, The pull-on type disposable diaper according to the above item <1>, wherein a range extending over a part of a portion covering the abutting surface side is the non-concave / convex area.

&Lt; 4 &

And a gap for allowing liquid to flow is formed between the non-skin contact surface side on both side portions of the absorbent main body and the through-air cuff, The disposable pull-on diaper according to any one of claims 1 to 3,

&Lt; 5 &

The pull-on type disposable diaper according to any one of the above items <1> to <4>, wherein no leak-proof sheet is disposed on the non-skin contact surface side of the absorbent body on both side portions of the absorbent main body.

&Lt; 6 &

The absorber has a central region and side regions that are located on both sides of the central region and have a thickness thinner than the center region and have a step on the skin contact surface side of the absorber at the boundary region between the central region and the side region, The disposable pull-on diaper according to any one of the above items <1> to <5>, wherein the region covers a stepped portion of the absorbent article.

&Lt; 7 &

Wherein the concavity and convexity region has a structure in which an upper layer sheet formed in a concavo-convex shape and a lower layer sheet not in a concavo-convex shape are bonded to each other in a concave portion of the upper sheet, A pants-type disposable diaper according to item (1).

&Lt; 8 &

The surface sheet according to any one of <1> to <7>, wherein the thickness of the non-irregular region is preferably 60% or less, more preferably 25% or less, of the thickness (T2) The disposable diaper according to any one of claims 1 to 4.

&Lt; 9 &

The pull-on disposable diaper according to any one of the above-mentioned &lt; 1 &gt; to &lt; 8 &gt;, wherein the projections in the uneven region are arranged in a zigzag pattern in plan view.

&Lt; 10 &

The pull-on disposable diaper according to any one of the items <1> to <9>, wherein the absorbent body is made to be capable of absorbing even from the non-skin contact surface side in both longitudinal side portions.

&Lt; 11 &

The convexo-concave region is formed at least on the central portion in the width direction of the absorbent body and preferably has a width of preferably 50% or more with respect to the width between the upper side edge portions of the through- The disposable pull-on diaper according to any one of the items <1> to <10>, wherein the diaper has a width of 100% or more, more preferably 100% or more.

&Lt; 12 &

The nonwoven fabric constituting the upper layer sheet or the sheet material forming the convex portion preferably has a fineness of the constituent fibers of preferably 0.1 to 5.0 dtex and more preferably 0.1 to 3.3 dtex. The disposable diaper according to any one of claims 1 to 4.

&Lt; 13 &

The uneven region has an upper layer sheet and a lower layer sheet and the fineness of the constituent fibers when the lower layer sheet is formed of a nonwoven fabric is preferably 1 to 20 dtex and more preferably 1.5 to 6 dtex. The disposable pull-on diaper according to any one of &lt; 12 &gt;

&Lt; 14 &

The panty cuff according to any one of the above items <1> to <13>, wherein the through-flow cuff is fixed in a state of extending from the non-skin contact surface side of the absorbent main body to the skin contact surface side, Type disposable diapers.

<15>

The pull-on disposable diaper according to any one of the above items <1> to <14>, wherein the absorbent body has an absorbent core, and the absorbent core has a crotch part penetrating the absorbent core in the crotch part.

&Lt; 16 &

Wherein the absorbent body has an absorbent core having a lower absorbent core and an upper absorbent core superimposed on the skin abutment side of the lower absorbent core, the lower absorbent core being disposed on both sides of the overlapping portion of the upper absorbent core in the crotch portion The disposable pull-on diaper according to any one of the items <1> to <14>, wherein the disposable diaper has a joint portion passing through the lower absorbent core.

&Lt; 17 &

The pull-on disposable diaper according to the above <15> or <16>, wherein a pitch between the convex portions is larger than a thickness of the absorbent body at a portion adjacent to the joint portion.

<18>

The pull-on disposable diaper according to any one of the above <15> to <17>, wherein the pitch between the convex portions is 2 mm or more and 20 mm or less.

<19>

The pull-on disposable diaper according to any one of <15> to <18>, wherein the absorber has a thickness of 1 mm or more and 10 mm or less.

<20>

The pull-on type disposable diaper according to any one of <15> to <19>, wherein the width of the joint portion is 2 to 20 mm.

&Lt; 21 &

The pull-on disposable diaper according to any one of <15> to <20>, wherein a pitch between the convex portions is at least 1/2 of a width of the joint portion.

&Lt; 22 &

The apparatus according to any one of <1> to <20>, wherein the convex portion and the concave portion are arranged in a line in the longitudinal direction of the diaper in a row and the heat is formed in multiple rows in the width direction of the diaper In the disposable diaper.

&Lt; 23 &

The uneven region has an upper layer sheet and a lower layer sheet,

The pull-on disposable diaper according to any one of the items <1> to <22>, wherein the upper-layer sheet is joined to the lower-layer sheet in the entire area or a part of the recess.

<24>

The pants-type disposable diaper according to any one of the items <1> to <23>, wherein the convex portion is hollow inside.

<25>

The convex portion has a height (T1) of preferably 0.1 mm or more, more preferably 0.2 mm or more, still more preferably 5 mm or less, further preferably 3 mm or less, and more specifically, The disposable pull-on diaper according to any one of the above items <1> to <24>, wherein the diaper is 0.1 mm or more and 5 mm or less, and more preferably 0.2 mm or more and 3 mm or less.

&Lt; 26 &

The thickness of the surface sheet of the portion having the convex portion is preferably 0.2 mm or more, more preferably 0.5 mm or more, still more preferably 6 mm or less, and further preferably 4 mm or less. More specifically, The disposable pull-on diaper according to any one of the items <1> to <25>, wherein the diaper has a width of preferably 0.2 mm or more and 6 mm or less, and more preferably 0.5 mm or more and 4 mm or less.

&Lt; 27 &

The pull-on type disposable diaper according to any one of the items <1> to <26>, wherein the number of convex portions per 10 cm 2 of the uneven region is 20 to 200, preferably 50 to 150.

&Lt; 28 &

Permeable topsheet and a liquid-retaining absorbent body, and an outer body which is positioned on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body, wherein the outer body, the back side portion, and the crotch portion A waist opening and a pair of leg openings are formed in the diaper,

A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-air cuffs are bonded to the skin contact surface side of the absorbent main body in the abdomen side portion and the back side portion, In the crotch part of the crotch part,

The topsheet has a convexo-concave region formed in the widthwise central portion of the absorbent main body in the shape of an acid point, and a flat non-concavo-convex region having no concavo-convex region at both end portions in the width direction of the absorbent main body,

The through-bore cuff has an inner joining portion and an outer joining portion bonded to the skin contact surface side of the absorbent main body on one or both of the abdominal side portion and the back side portion, And the outer joint portion is fixed on the non-irregular region at a portion in the vicinity of the end in the width direction of the absorbent main body,

Wherein the inner joining portion and the outer joining portion are arranged in a width direction of the absorbent main body with a non-joined region not bonded on the topsheet sandwiched therebetween,

The waist circumferential gathers in either or both of the abdominal side portion and the abdomen side portion of the outer body have a waist circumferential gathers which are stretchable in the diaper width direction on the abdominal side portion and the abdomen portion, Having wealth,

Wherein the outer joining portion and the non-joining region of the through-bore cuff overlap with the inner stretchable and contractible portion in the thickness direction of the diaper.

&Lt; 29 &

Further comprising an outer body which is located on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body,

Wherein the topsheet has a convexo-concave region in which convex portions are formed in an acid point on the center in the width direction of the absorbent main body, and non-concave / convex regions having no concavities and convexities at both ends in the width direction of the absorbent main body,

The through-bore cuff has an inner joining portion and an outer joining portion bonded to the skin contact surface side of the absorbent main body on one or both of the abdominal side portion and the back side portion, And the outer joint portion is fixed on the non-irregular region at a portion in the vicinity of the end in the width direction of the absorbent main body,

Wherein the inner joining portion and the outer joining portion are arranged in a width direction of the absorbent main body with a non-joined region not bonded on the topsheet sandwiched therebetween,

The waist circumferential gathers in either or both of the abdominal side portion and the abdomen side portion of the outer body have a waist circumferential gathers which are stretchable in the diaper width direction on the abdominal side portion and the abdomen portion, Having wealth,

The disposable diaper according to any one of the preceding claims, wherein the outer joint portion and the non-joint region of the through-bore cuff overlap with each other in the thickness direction of the diaper.

&Lt; 30 &

The inner joint portion is fixed on the uneven portion on the absorber and the outer joint portion is fixed on the non-uneven portion on the absorber. The pants- Disposable diapers.

&Lt; 31 &

The pull-on disposable diaper according to any one of the items <28> to <30>, wherein the waist-surrounding gathers having the inner stretchable and contractible portion are formed in a state of being divided in the width direction of the diaper.

<32>

Wherein the inner joint portion is fixed on the uneven region with an adhesive interposed therebetween and the outer joint portion is fixed on the non-uneven region with an adhesive interposed therebetween. Pants-type disposable diapers.

&Lt; 33 &

The inner joining portion and the outer joining portion are all fixed to the topsheet with an adhesive interposed therebetween,

The pull-on disposable diaper according to the above-mentioned &lt; 32 &gt;, wherein the adhesive for fixing the inner joint is higher than the adhesive for fixing the outer joint.

&Lt; 34 &

Wherein the difference in basis weight between the basis weight of the adhesive for fixing the inner joint and the basis weight of the adhesive for fixing the outer joint is 1 g / m 2 or more, preferably 2 g / m 2 or more and 5 g / m 2 or less. Pants-type disposable diapers.

<35>

Wherein the inner joining portion is fixed to the topsheet with an adhesive interposed therebetween,

The pull-on disposable diaper according to any one of the above-mentioned 28 to 30, wherein the basis weight of the adhesive for fixing the inner joint is 3 to 25 g / m 2.

&Lt; 36 &

Wherein the outer joint portion is fixed to the topsheet with an adhesive interposed therebetween,

The pull-on disposable diaper according to any one of the above-mentioned 28 to 30, wherein the basis weight of the adhesive for fixing the outer joint portion is 1 to 20 g / m 2.

&Lt; 37 &

The inner joining portion may be any one of the above-mentioned &lt; 28 &gt; to &lt; 36 &gt;, wherein the distance from the upper edge portion of the through-bore cuff, which is a free end in the crotch portion, is preferably 8 mm or less, more preferably 5 mm or less A pants-type disposable diaper according to item (1).

&Lt; 38 &

The inner joining portion and the outer joining portion may be any one of the above-mentioned <28> to <37>, wherein the inner joining portion and the outer joining portion thereof are arranged in the longitudinal direction of the diaper, In the disposable diaper.

<39>

The inner joint portion and the outer joint portion have a length L6 in which the length of the inner joint portion in the longitudinal direction X of the diaper is long and the parallel joint of the inner joint portion and the outer joint portion thereof is parallel to the inner joint portion, The pull-on type disposable diaper according to any one of the items <28> to <38>, wherein the length L3 of the joint portion in the length direction X of the diaper.

&Lt; 40 &

The inner joining portion and the outer joining portion are all fixed to the topsheet with an adhesive interposed therebetween,

Wherein the adhesive for fixing the inner joint portion has a length along the width direction of the absorbent main body that is longer than the adhesive for fixing the outer joint portion, .

<41>

(W3) of a length (W3) of the adhesive for fixing the inner joint to a length (W3) along the width direction of the absorbent main body and a length (W4) of the adhesive for fixing the outer joint, / W4) is preferably 1.5 or more, more preferably 2 or more, and further preferably 1.5 or more and 10 or less, and more preferably 2 or more and 8 or less. Wherein the pants-type disposable diaper is a pants-type disposable diaper.

&Lt; 42 &

The length W5 of the non-bonding region along the width direction of the absorbent main body is preferably 10 mm or more, preferably 5 mm or more and 30 mm or less, more preferably 10 mm or more and 25 mm or less The pull-on disposable diaper according to any one of the above items <28> to <41>.

&Lt; 43 &

Wherein the concavity and convexity region has a structure in which an upper layer sheet formed in a concavo-convex shape and a lower layer sheet not formed in a concavo-convex shape are bonded to each other in a concave portion of the upper sheet, A pants-type disposable diaper according to item (1).

&Lt; 44 &

Wherein the surface sheet has a portion covering the side edge in the longitudinal direction of the absorbent body and a portion covering the side of the non-skin contact surface on both side portions in the longitudinal direction of the absorbent body, 28. The pull-on disposable diaper according to any one of the above items <28> to <43>.

<45>

The uneven region has an upper layer sheet and a lower layer sheet,

The pull-on type disposable diaper according to any one of the items <28> to <44>, wherein the convex portion is formed in a zigzag shape on the upper-layer sheet.

<46>

The pants-type disposable diaper according to any one of the above <28> to <28>, wherein the convex portion is hollow inside.

&Lt; 47 &

Wherein the convex portion has a height T1 of preferably 0.1 mm or more, more preferably 0.2 mm or more, still more preferably 5 mm or less, and further preferably 3 mm or less. The disposable diaper according to any one of claims 1 to 4.

<48>

The thickness of the surface sheet of the portion having the convex portion is preferably 0.2 mm or more, more preferably 0.5 mm or more, still more preferably 6 mm or less, and further preferably 4 mm or less. The disposable pull-on diaper according to any one of the preceding claims,

&Lt; 49 &

The nonwoven fabric constituting the upper sheet or the sheet material forming the convex portion preferably has a fineness of from 0.1 to 5.0 dtex and more preferably a fineness of from 0.1 to 3.3 dtex. The disposable diaper according to any one of claims 1 to 4.

<50>

The uneven region has an upper layer sheet and a lower layer sheet and the fineness of the constituent fibers when the lower layer sheet is formed of a nonwoven fabric is preferably 1 to 20 dtex and more preferably 1.5 to 6 dtex, The disposable pull-on diaper according to any one of &lt; 1 &gt;

<51>

The device according to any one of <29> to <50>, wherein the convex portion and the concave portion are arranged in a line in the longitudinal direction of the diaper in a row, and the heat is formed in multiple rows in the width direction of the diaper In the disposable diaper.

<52>

The pull-on type disposable diaper according to any one of the preceding items, wherein the number of convex portions per 10 cm 2 of the unevenness area is 20 to 200, preferably 50 to 150.

<53>

Permeable topsheet and a liquid-retaining absorbent body, and an outer body which is positioned on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body, wherein the outer body, the back side portion, and the crotch portion A waist opening and a pair of leg openings are formed in the diaper,

The absorber has a thin-walled portion at an end portion in the longitudinal direction which is located in the abdomen side portion or the back side portion,

In the above-mentioned outer body, a plurality of waist elastic members are provided on the crotch side area of the abdomen side portion and the abdomen side portion in the longitudinal direction of the absorbent body along the width direction of the diaper Wherein at least one of the plurality of waist elastic members in the abdomen side portion or the abdomen side portion is arranged to transverse the absorbent body in the diaper width direction and has a portion overlapping the thin portion,

The surface sheet has a concavo-convex shape,

Wherein the position of the end edge in the longitudinal direction of the topsheet and the position of the end edge in the longitudinal direction of the absorbent article coincide with each other in the abdomen side portion or the back side portion where the thin portion is present, And the contact surface side is covered by the end cover nonwoven fabric.

<54>

Further comprising an outer body which is located on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body,

The absorber has a thin-walled portion at an end portion in the longitudinal direction which is located in the abdomen side portion or the back side portion,

In the above-mentioned outer body, a plurality of waist elastic members are provided on the crotch side area of the abdomen side portion and the abdomen side portion in the longitudinal direction of the absorbent body along the width direction of the diaper Wherein at least one of the plurality of waist elastic members in the abdomen side portion or the abdomen side portion is arranged to transverse the absorbent body in the diaper width direction and has a portion overlapping the thin portion,

The surface sheet has a concavo-convex shape,

Wherein the position of the end edge in the longitudinal direction of the topsheet and the position of the end edge in the longitudinal direction of the absorbent article coincide with each other in the abdomen side portion or the back side portion where the thin portion is present, The disposable diaper according to the above-mentioned &lt; 1 &gt;, wherein the contact surface side is covered by the end cover nonwoven fabric.

<55>

The topsheet may have a bulk softness value in the diaper width direction of 0.22 N or more and 0.60 N or less and a thickness recovery rate after pressing for 1 minute under a load of 20 cN / In the disposable diaper.

&Lt; 56 &

The pants-type disposable diaper according to any one of the items <53> to <55>, wherein the top sheet has a bulk softness value of 0.25 N or more and 0.40 N or less in the diaper width direction.

<57>

The pull-on disposable diaper according to any one of the items <53>, wherein the thickness recovery rate after the pressure is 1 minute under the load of 20 cN / cm 2 is 90% or more and 100% or less.

<58>

The thin portion has a length L in the diaper length direction X of preferably 5 mm or more, more preferably 10 mm or more, further preferably 50 mm or less, more preferably 35 mm or less The pull-on type disposable diaper according to any one of the items <53> to <57> above.

<59>

The pull-on disposable diaper according to any one of the above-mentioned items, wherein the thin portion extends over the entire width of the absorbent body at the end portion of the absorbent body.

<60>

The absorbent article according to any one of the items <53> to <59>, wherein the absorbent core has an absorbent core and a core wrap sheet for wrapping the absorbent core, wherein the thin portion is formed of only the core wrap sheet extending from the absorbent core Wherein the pants-type disposable diaper is a pants-type disposable diaper.

&Lt; 61 &

The pull-on disposable diaper according to any one of the above-mentioned items, wherein the topsheet has a thickness of 0.7 mm or more and 7.0 mm or less.

<62>

The surface sheet preferably has a thickness of preferably 0.7 mm or more, more preferably 0.9 mm or more, and further preferably 7.0 mm or less, and more preferably 5.0 mm or less A pull-on type disposable diaper according to any one of the preceding claims.

<63>

Wherein the topsheet is constituted by a three-dimensional sheet having a concave-convex upper-layer sheet and a concave-convex lower-layer sheet bonded together in a concave portion of the upper-layer sheet, The pants according to any one of the above items <53> to <62>, wherein the upper layer sheet is formed of a nonwoven fabric containing thermoplastic fibers and the upper layer side thereof forms a skin contact surface toward the wearer's skin side Type disposable diapers.

<64>

The pants-type disposable diaper according to the above item <63>, wherein the three-dimensional sheet has a convex portion formed in a zigzag shape.

<65>

And the joint portion between the concave portion and the lower-layer sheet of the upper-layer sheet is regularly arranged, and when the joint portion is viewed from a straight line in the diaper longitudinal direction / diaper width direction, the total length of each joint portion per one- The pull-on type disposable diaper according to any one of the items &lt; 63 &gt;, &lt; 64 &gt;, wherein the total length of the diaper is in the width direction of the diaper.

<66>

The surface sheet is composed of a concavo-convex nonwoven fabric having a plurality of first convex portions protruding from the first surface side and having an inner space and a plurality of second convex portions protruding from the second surface side and having an inner space, , The first surface side forms a skin abutment surface facing the skin side of the wearer,

The first convex portion has an annular wall portion between the top portion and the opening portion of the inner space,

The pull-on disposable diaper according to any one of the items <53> to <62>, wherein the first and second convex portions are arranged alternately in two different directions intersecting with each other when the nonwoven fabric is viewed in a plan view .

<67>

The pull-on disposable diaper according to the above-mentioned &lt; 66 &gt;, wherein the fiber density is increased from the first convex portion toward the second convex portion.

<68>

The pants-type disposable diaper according to the above-mentioned &lt; 66 &gt; or &lt; 67 &gt;, wherein the fiber density of the first convex portion is the lowest in the thickness direction of the concavo-convex nonwoven fabric, and the fiber density of the second convex portion is the highest.

&Lt; 69 &

The fiber density of the wall portion located between the governor of the first convex portion and the second convex portion is a value intermediate between the fiber density of the first convex portion and the fiber density of the second convex portion, 66. The pull-on disposable diaper according to any one of claims 66 to 66.

<70>

Wherein the end cover nonwoven fabric has a portion bonded to the top of the convex portion of the concavo-convex shape of the topsheet and the portion of the convex portion not bonded to the topsheet, A pull-on type disposable diaper according to any one of the preceding claims.

<71>

Wherein the end cover nonwoven fabric has a crotch side fixing portion joined to the topsheet and a waist opening portion fixing portion joined to a member extending from an end edge in the longitudinal direction of the absorbent body, The pull-on disposable diaper according to any one of the items <53> to <70>, wherein the disposable diaper has a non-joined portion which is not bonded to another member between the opening-side fixing portions.

<72>

The length L1 in the diaper longitudinal direction X is preferably 0.5 mm or more, more preferably 2 mm or more, and preferably 7 mm or less, more preferably 5 mm or less lt; RTI ID = 0.0 &gt; mm, &lt; / RTI &gt;

<73>

The absorbent main body has a liquid-impermeable backlit sheet,

The position of the end edge in the longitudinal direction of the topsheet and the position of the end edge in the longitudinal direction of the absorbent article and the position of the end edge in the longitudinal direction of the anti- The disposable pull-on diaper according to any one of the above-mentioned &lt; 53 &gt;

<74>

The convex portion of the concavities and convexities preferably has a height T1 of preferably 0.1 mm or more, more preferably 0.2 mm or more, still more preferably 0.7 mm or more, still more preferably 7 mm or less, still more preferably 5 mm The disposable pull-on diaper according to any one of the items <53> to <75>, wherein the diaper is 3 mm or less, more preferably 3 mm or less.

<75>

The thickness (T2) of the surface sheet of the portion having the convex portion is preferably 0.7 mm or more, more preferably 0.9 mm or more, further preferably 7 mm or less, and more preferably 5 mm or less. The disposable pull-on diaper according to any one of &lt; 1 &gt;

<76>

The pull-on type disposable diaper according to any one of the above-mentioned items, wherein the number of convex portions per 10 cm 2 of the unevenness area is 20 to 200, preferably 50 to 150.

&Lt; 77 &

The bottom portion E of the convex portion in the longitudinal direction X of the diaper (see Fig. 27) is 0.5 to 5.0 mm, preferably 1.0 to 4.0 mm. The pants according to any one of the above- Type disposable diapers.

<78>

The bottom portion F (see Fig. 27) of the convex portion in the diaper width direction Y is 0.5 to 10 mm, preferably 1.0 to 7.0 mm. The pants according to any one of the above-mentioned &lt; Type disposable diapers.

<79>

The concave portion has a dimension G (see Fig. 27) of the diaper width direction Y, preferably 0.1 to 5.0 mm, more preferably 0.2 to 3.0 mm, in the diaper length direction X The pull-on type disposable diaper according to any one of the items <53> to <50>, wherein the width (see Fig. 27) of the diaper is 0.1 to 5.0 mm, particularly 0.2 to 3.0 mm.

<80>

The pull-on disposable diaper according to any one of the above items <53>, wherein the topsheet and the absorbent body are bonded to each other via a patterned adhesive.

<81>

The pull-on disposable diaper according to any one of the items <53>, wherein the topsheet and the end cover nonwoven fabric are bonded via a patterned adhesive.

<82>

The absorbent main body is provided with a liquid-impermeable backlash sheet,

The pull-on type disposable diaper according to any one of the above-mentioned items <53>, wherein the absorbent body and the anti-seizure sheet are bonded via a patterned adhesive.

<83>

The pull-on disposable diaper according to any one of the items <53> to <79>, wherein the absorbent main body and the exterior body are bonded via a patterned adhesive.

<84>

The waist-surrounding elastic member which is arranged transversely to the absorbent body in the diaper width direction and has a portion overlapping the thin-walled portion has, at a portion overlapping the absorbent body, two elastic members for forming two waist elastic members The pull-on type disposable diaper according to any one of the items <53> to <83>, which is bonded to one or both of the sheets.

Example

Hereinafter, the present invention (third invention) will be described more specifically by way of examples, but the present invention (third invention) is not limited to these examples.

[Example 1]

A three-dimensional sheet having a constitution in which an upper layer sheet formed in a concave-convex shape as a top sheet and a lower layer sheet not formed in a concavo-convex shape were bonded to each other in a concave portion of an upper layer sheet was used.

The three-dimensional sheet is an air-through nonwoven fabric composed of a core-sheath type conjugate fiber (3 dtex x 51 mm) in which the core portion is made of PET (polyethylene terephthalate) and the beginning is made of PE (polyethylene) Through-air bonded nonwoven fabric composed of core-sheath type conjugate fiber [3 dtex x 51 mm] having a core portion made of PET (polyethylene terephthalate) and an initial portion made of PE (polyethylene) was used. Table 1 shows the bulk softness value of the diaper sheet in the diaper width direction and the thickness recovery rate after the pressure was applied for 1 minute under a load of 20 cN / cm 2.

Using this topsheet, a pull-on disposable diaper having the constitutions shown in Figs. 22 to 25 was produced. As the absorbent body, an absorbent core composed of a mixture of pulp fibers and an absorbent polymer was entirely wrapped with a core wrap sheet made of tissue paper. Further, the absorber had a thin portion made of a core wrap sheet at both ends in the longitudinal direction of the absorber. An air through nonwoven fabric having a basis weight of 20 g / m &lt; 2 &gt; was used for the sheet 16 ((outer layer material in Table 1)) disposed on the outer surface side of the diaper among the sheets 15, , A sponge bonded nonwoven fabric having a basis weight of 16 g / m 2 was used for the sheet 15 (the "inner layer material" in Table 1) disposed on the inner surface side of the diaper, And the folded back portion with respect to the contact face side was used as the end cover nonwoven fabric 17.

As the waist elastic member 91, a wasted elastic body made of polyurethane and having a thickness of 780 dtex including the waist elastic members 91a and 91b overlapping the thin portion was disposed.

[Example 2]

A disposable pull-on diaper was produced in the same manner as in Example 1 except that a concave-convex nonwoven fabric of the form shown in Figs. 29 and 30 was used as the top sheet. The concavo-convex nonwoven fabric is an air-through nonwoven fabric composed of core-sheath type conjugate fiber (2.5 dtex x 51 mm) whose core portion is made of PET (polyethylene terephthalate) and whose initial portion is made of PE (polyethylene) And the thickness recovery rate after the pressure was applied for 1 minute under a load of 20 cN / cm 2 are shown in Table 1. [

[Comparative Example 1]

Except that a flat air through nonwoven fabric composed of a core-sheath type conjugate fiber (3.0 dtex x 51 mm) having a core portion made of PET (polyethylene terephthalate) and an initial portion made of PE (polyethylene) A pull-on type disposable diaper was produced in the same manner as in Example 1.

〔evaluation〕

In order to evaluate the absence of fit and discomfort in the vicinity of the end of the absorber 4, five mother monitors having children between 0.8 and 2 years old were given the following disturbance and fit feeling for the absorber end portion of the diaper And the average point of the evaluation was used as the evaluation point of each diaper. The results are shown in Table 1.

[Evaluation criteria of discomfort of the absorbent body end portion of the diaper]

5: There is no sense of incongruity.

4: There is a slight discomfort

3: I can not say either

2: There is a slight discomfort.

1: There is a sense of incongruity.

[Evaluation Criteria of Feet]

5: Good fit

4: The fit is slightly better

3: I can not say either

2: The fit is slightly bad.

1: Bad fit

The results of Table 1 show that the pull-on type disposable diaper of the embodiment is superior to the pull-on type disposable diaper of the comparative example in that there is no discomfort in the end portion of the absorbent while maintaining pitability.

Industrial availability

The disposable pull-on diaper according to the present invention (first invention) is excellent in tactile feeling and liquid return prevention property of the liquid absorbent surface in contact with the skin, and is also excellent in absorbing performance and durability in the crotch part.

The disposable diaper according to the present invention (second aspect of the invention) is characterized in that the surface sheet has irregularities over a wide range and is excellent in touch and liquid return prevention properties of the liquid absorbent surface in contact with the skin, Deterioration of the property or the like is also prevented.

According to the pants-type disposable diaper of the present invention (the third invention), it is possible to make both the pit in the vicinity of the end portion of the absorber and the absence of discomfort.

Claims (21)

1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-
The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,
A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,
The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,
Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Non-convex region,
Wherein the absorbent body has a central region and a side region that is located on both sides of the central region and is thinner than the central region and has a step on the skin contact surface side of the absorbent body at a boundary portion between the central region and the side region, The uneven region covers the stepped portion of the absorber,
Side elastic members for raising the side portions of the absorber are disposed in the vicinity of both side edges in the longitudinal direction of the absorber, and the surface sheet is sandwiched from a portion covering the non-skin contact surface side of the absorber, And a region extending over a part of a portion covering the abutment surface side is the non-abrasive area. delete delete 1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-
The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,
A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,
The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,
Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Non-convex region,
Wherein the absorbent body has a central region and a side region that is located on both sides of the central region and is thinner than the central region and has a step on the skin contact surface side of the absorbent body at a boundary portion between the central region and the side region, The uneven region covers the stepped portion of the absorber,
Wherein the concavoconvex area has a structure in which an upper layer sheet formed in a concavo-convex shape and a lower layer sheet not formed in a concavo-convex shape are bonded to each other in a concave portion of the upper layer sheet. 1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-
The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,
A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,
The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,
Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Non-convex region,
Wherein the absorbent body has a central region and a side region that is located on both sides of the central region and is thinner than the central region and has a step on the skin contact surface side of the absorbent body at a boundary portion between the central region and the side region, The uneven region covers the stepped portion of the absorber,
And the convex portion in the uneven region is arranged in a zigzag manner in a plan view. The method according to any one of claims 1, 4, and 5,
Wherein the absorbent body is made to be capable of absorbing even from the non-skin contact surface side in both longitudinal side portions thereof. 1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-
The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,
A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,
The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,
Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Non-convex region,
Wherein the absorbent body has a central region and a side region that is located on both sides of the central region and is thinner than the central region and has a step on the skin contact surface side of the absorbent body at a boundary portion between the central region and the side region, The uneven region covers the stepped portion of the absorber,
Further comprising an outer body which is located on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body,
Wherein the topsheet has a convexo-concave region in which convex portions are formed in an acid point on the center in the width direction of the absorbent main body, and non-concave / convex regions having no concavities and convexities at both ends in the width direction of the absorbent main body,
The through-bore cuff has an inner joining portion and an outer joining portion bonded to the skin contact surface side of the absorbent main body on one or both of the abdominal side portion and the back side portion, And the outer joint portion is fixed on the non-irregular region at a portion in the vicinity of the end in the width direction of the absorbent main body,
Wherein the inner joining portion and the outer joining portion are arranged in a width direction of the absorbent main body with a non-joined region not bonded on the topsheet sandwiched therebetween,
The waist circumferential gathers in either or both of the abdominal side portion and the abdomen side portion of the outer body have a waist circumferential gathers which are stretchable in the diaper width direction on the abdominal side portion and the abdomen portion, Having wealth,
Wherein the outer joining portion and the non-joining region of the through-bore cuff overlap with the inner stretchable and contractible portion in the thickness direction of the diaper. 8. The method of claim 7,
Wherein the inner joining portion is fixed on the uneven portion on the absorber and the outer joining portion is fixed on the non-uneven portion on the absorber. 8. The method of claim 7,
Wherein the waist circumferential gathers having the inner stretchable and contractible portion are formed in a state of being divided in the width direction of the diaper. 8. The method of claim 7,
Wherein the inner joining portion is fixed on the uneven region with an adhesive interposed therebetween and the outer joining portion is fixed on the non-uneven region with an adhesive interposed therebetween. 11. The method of claim 10,
Wherein the adhesive for fixing the inner joint is higher in basis weight than the adhesive for fixing the outer joint. 11. The method of claim 10,
Wherein the adhesive for fixing the inner joint portion is longer than the adhesive for fixing the outer joint portion along the width direction of the absorbent main body. 8. The method of claim 7,
Wherein the concavoconvex area has a structure in which an upper layer sheet formed in a concavo-convex shape and a lower layer sheet not formed in a concavo-convex shape are bonded to each other in a concave portion of the upper layer sheet. 1. A pull-on disposable diaper comprising: an absorbent main body having a liquid-permeable top sheet and a liquid-retaining absorbent body; a waist opening portion; and a pair of leg openings formed in the waist-
The topsheet is disposed so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact side of both longitudinal side portions of the absorbent body,
A pair of through-air cuffs are formed on both sides in the longitudinal direction of the absorbent main body, and the through-bore cuffs are provided on the skin side abutting portion of the absorbent main body, And in the crotch portion in the wearing state,
The absorbent main body has a fixing portion for a member on the side of the non-skin contact surface on a portion separated from the longitudinally opposite side edges of the absorbent body inward in the width direction of the absorbent body,
Wherein the surface sheet has a concavo-convex region in which convex portions are formed in an acid point shape on a portion covering the skin contact face side of the absorbent body, and a portion of the absorbent body covering the non- Non-convex region,
Wherein the absorbent body has a central region and a side region that is located on both sides of the central region and is thinner than the central region and has a step on the skin contact surface side of the absorbent body at a boundary portion between the central region and the side region, The uneven region covers the stepped portion of the absorber,
Further comprising an outer body which is located on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body,
The absorber has a thin-walled portion at an end portion in the longitudinal direction which is located in the abdomen side portion or the back side portion,
In the above-mentioned outer body, a plurality of waist elastic members are provided on the crotch side area of the abdomen side portion and the abdomen side portion in the longitudinal direction of the absorbent body along the width direction of the diaper At least one of the plurality of waist elastic members in the abdomen side portion or the abdomen side portion is disposed transversely to the absorbent body in the diaper width direction and has a portion overlapping the thin portion,
The surface sheet has a concavo-convex shape,
Wherein the position of the end edge in the longitudinal direction of the topsheet and the position of the end edge in the longitudinal direction of the absorbent article coincide with each other in the abdomen side portion or the back side portion where the thin portion is present, And the contact surface side is covered by the end cover nonwoven fabric. 15. The method of claim 14,
Wherein the topsheet has a bulk softness value of 0.22 N or more and 0.60 N or less in the diaper width direction and a thickness recovery rate after pressing for 1 minute under a load of 20 cN / cm 2 of 80% or more. 15. The method of claim 14,
Wherein the topsheet has a thickness of 0.7 mm or more and 7.0 mm or less. 15. The method of claim 14,
Wherein the topsheet is constituted by a three-dimensional sheet having a concave-convex upper-layer sheet and a concave-convex lower-layer sheet bonded together in a concave portion of the upper-layer sheet, Wherein the upper layer sheet is formed of a nonwoven fabric containing thermoplastic fibers and the upper layer side of the upper layer sheet forms a skin abutment surface directed toward the skin side of the wearer. 18. The method of claim 17,
Wherein the three-dimensional sheet has a convex portion formed in a zigzag shape. 15. The method of claim 14,
The surface sheet is composed of a concavo-convex nonwoven fabric having a plurality of first convex portions protruding from the first surface side and having an inner space and a plurality of second convex portions protruding from the second surface side and having an inner space, , The first surface side forms a skin abutment surface facing the skin side of the wearer,
The first convex portion has an annular wall portion between the top portion and the opening portion of the inner space,
Wherein the first and second convex portions are arranged alternately in two different directions intersecting with each other when viewed in plan from the nonwoven fabric. 15. The method of claim 14,
Wherein the end cover nonwoven fabric has a portion bonded to the convex portion of the concavo-convex portion of the topsheet, and the convex portions are not bonded to the topsheet. 15. The method of claim 14,
Wherein the end cover nonwoven fabric has a crotch side fixing portion joined to the topsheet and a waist opening portion fixing portion joined to a member extending from an end edge in the longitudinal direction of the absorbent body, And a non-joined portion which is not bonded to another member between the opening-side fixing portions.

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