WO2017043168A1

WO2017043168A1 - Absorbent article

Info

Publication number: WO2017043168A1
Application number: PCT/JP2016/069903
Authority: WO
Inventors: 嵩坂倉
Original assignee: 花王株式会社
Priority date: 2015-09-07
Filing date: 2016-07-05
Publication date: 2017-03-16
Also published as: JP2017051281A; JP6083906B1; RU2670331C1; TWI678196B; CN107847371A; TW201711657A; CN107847371B

Abstract

A pair of fastening members (8) are fixed to an absorbent main body (5) on the dorsal side portion (1R), and a non-fiber stacked portion (45) is formed extending in the longitudinal direction X in an absorbent core (40) in a crotch portion (1M). The fastening members (8) include an elastic side panel (6) fixed to the side edge portion (5S) of the absorbent main body (5) and a fastening tape (7). When a virtual straight line (L1) passing through a side panel fixing point (A) and a fastening tape fixing point (B) is drawn to each of the pair of fastening members (8) in the unfolded state of the absorbent main body (5) and the natural state of the side panels (6), the dorsal side longitudinal end (45R) of the non-fiber stacked portion (45) is positioned at or near the intersection (C) of the two virtual straight lines (L1), and the non-fiber stacked portion (45) extends in the longitudinal direction (X) from the dorsal side longitudinal end (45R) toward the ventral side longitudinal end (40F) of the absorbent core (40).

Description

Absorbent articles

The present invention relates to an absorbent article such as a disposable diaper, and particularly to a deployable absorbent article provided with a fastening member.

As a typical form of the absorbent article, the absorbent article has an abdominal part arranged on the abdomen side of the wearer, a dorsal part arranged on the dorsal side, and a crotch part located therebetween, and is liquid-permeable. Examples include a top sheet, a liquid-impermeable back sheet, and an absorbent core disposed between both sheets. In addition, as a disposable diaper that is a kind of absorbent article, stretchable side panels that expand and contract in the lateral direction on both side edges of the back side of the absorbent main body including the absorbent core are laterally extended from the side edges. A deployable disposable diaper is known that is attached so as to extend outward, and is further provided with a fastening tape for fastening to be used when a diaper is attached to the front end of each side panel in the extending direction. . The deployable disposable diaper having such a configuration can be attached by extending the fastening tape on the back side to the abdomen of the wearer and fastening the fastening part of the tape to the outer surface of the abdomen.

Further, in absorbent articles, conventionally, for various purposes, a part having a smaller basis weight than the peripheral part or a through hole penetrating the absorbent core in the thickness direction has been formed in a part of the absorbent core. It has been broken. For example, in Patent Document 1, for the purpose of allowing the absorbent core to be easily bent in the lateral direction, the absorbent core in the deployable disposable diaper is provided with a longitudinally extending groove as a bending means. It is described that two are formed symmetrically with respect to the line. Patent Document 2 describes that a plurality of grooves extending in the vertical direction are formed in an absorbent core of a deployable disposable diaper for the purpose of improving the diffusibility and fit of excretory fluid.

JP 2004-141532 A JP 2005-34652 A

The present invention has a longitudinal direction extending from the abdomen side of the wearer to the back side through the crotch part and a lateral direction perpendicular thereto, and a crotch part arranged in the crotch part when worn, Absorption side which has abdominal side part arranged on the abdomen side of a wearer, and a back side part arranged on a wearer's back side rather than the crotch part in the lengthwise direction, and the core forming material is piled An absorbent main body including an elastic core, and a pair of fastening members are laterally outward from both side edges along the longitudinal direction of the absorbent main body at the back side. The present invention relates to an absorbent article fixed so as to extend. A non-stacked fiber portion extending in the vertical direction is formed in the absorbent core in the crotch part. Each of the pair of fastening members includes a stretchable side panel fixed to the absorbent main body so as to extend laterally outward from a side edge of the absorbent main body, and an extension of the side panel. And a fastening tape fixed to the side panel so as to extend laterally outward from the directional tip. In the case where the absorbent main body is spread out in a flat state and the side panel is in a natural state, the side panel is fixed to the innermost portion in the longitudinal direction and the outermost portion in the lateral direction in the fixing portion with the absorbent main body. The part located is a side panel fixing point, and the part located at the innermost side in the vertical direction and the outermost side in the lateral direction in the fixing part of the fastening tape to the side panel is used as a fastening tape fixing point. When a virtual straight line L1 passing through the side panel fixing point and the fastening tape fixing point is drawn for each wearing member, the non-stacked fiber portion is located at the intersection of the two virtual straight lines L1 or in the vicinity of the intersection. The non-stacked portion extends in the longitudinal direction from the dorsal longitudinal end toward the ventral longitudinal end of the absorbent core.

FIG. 1 is a surface sheet side showing a developed state in which a disposable diaper as an embodiment of the absorbent article of the present invention is expanded in a flat shape by extending elastic members of respective parts of an absorbent main body, that is, a skin facing surface side. FIG. FIG. 2 is a schematic cross-sectional view taken along the line II (arrangement part of the non-stacking portion) in FIG. FIG. 3 is a schematic cross-sectional view taken along line II-II in FIG. 1 (location portion of the fastening member). FIG. 4 is a schematic rear view when the diaper shown in FIG. 1 is viewed from the back side of the wearer. FIG. 5 is a schematic cross-sectional view of the crotch part of the diaper in the wearing state shown in FIG.

Detailed Description of the Invention

Deployable absorbent articles can exhibit their original performance only when the fastening tape is secured in an appropriate position, for example, and in an appropriate wearing state. In the deployable absorbent article described in

Patent Documents

1 and 2, the absorbent core is formed with a non-stacked portion in which the core forming material is not substantially stacked, such as a groove or a through hole. Unintentional wrinkles or folds on the surface sheet or other member that forms the skin facing surface of the diaper in the fastening tape fastening operation due to the fact that the formation position of the unstacked portion is not appropriate in relation to the fastening tape. There was room for improvement in terms of fit. When unintentional wrinkles or folds are present on the top sheet when the diaper is worn, a gap is created between the top sheet and the skin of the wearer, and excreted liquid such as urine leaks outside through the gap. There is a risk of release.

Therefore, the present invention relates to providing an absorbent article that can fit the wearer's crotch portion and can provide a high leakage prevention effect by simply mounting according to a conventional method without paying special attention during the mounting operation.

Hereinafter, the absorbent article of the present invention will be described based on a disposable diaper which is a preferred embodiment thereof with reference to the drawings. As shown in FIG. 1, the disposable diaper 1 of the present embodiment has a longitudinal direction X extending from the wearer's abdomen to the back via the crotch portion and a lateral direction Y orthogonal thereto, and when worn, A crotch part 1M arranged in the crotch part, an abdomen part 1F arranged on the abdomen side of the wearer than the crotch part 1M, and a back side part 1R arranged on the dorsal side of the wearer than the crotch part 1M; In the longitudinal direction X. The crotch part 1M includes an excretion part facing part (not shown) that is disposed to face the excretion part of the wearer such as a penis when worn. The excretory part opposing part is normally in a position biased slightly closer to the ventral part 1F than the center of the diaper 1 in the longitudinal direction X. The abdominal side portion 1F, the crotch portion 1M, and the dorsal side portion 1R correspond to respective regions when the diaper 1 (absorbent body 5) is divided so as to be divided into approximately three equal parts in the vertical direction X.

The diaper 1 is a so-called unfolded panel-type disposable diaper, which is a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid-retaining property disposed between both

sheets

2 and 3. And a pair of fastening

members

8 and 8 fixed to both

side edges

5S and 5S along the longitudinal direction X of the absorbent main body 5 in the back side 1R. Yes. The diaper 1 is formed symmetrically with respect to a longitudinal center line CLx extending in the longitudinal direction X by dividing the absorbent body 5 into the transverse direction Y. The absorptive main body 5 has a rectangular shape that is long in the longitudinal direction X in plan view as shown in FIG. The pair of fastening

members

8 and 8 are fixed to the absorbent main body 5 so as to extend outward in the lateral direction Y from both

side edges

5S and 5S of the absorbent main body 5 in the back side portion 1R.

Each of the top sheet 2 and the back sheet 3 has a size larger than that of the absorber 4 and extends outward from the peripheral edge of the absorber 4, and the extending portions are adhesive, heat seal, ultrasonic They are joined together by a known joining means such as a seal. As the top sheet 2 and the back sheet 3, various types conventionally used for this type of absorbent article can be used without particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet 2, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 3. The back sheet 3 has, for example, a liquid-impermeable film sheet alone and a non-skin facing surface of the film sheet, that is, a form in which an exterior sheet is laminated on the outer surface side. It is a nonwoven fabric.

The absorbent body 4 includes a liquid-retaining absorbent core 40, a skin-side core wrap sheet 41 that covers the skin facing surface of the absorbent core 40, and a non-skin that covers the non-skin facing surface of the absorbent core 40. The side core wrap sheet 42 is included. The absorptive core 40 has an hourglass shape in which a central portion in the longitudinal direction X is inwardly bounded in a plan view as shown in FIG. 1, and has a long shape in the longitudinal direction X. The absorbent core 40 has a ventral vertical end 40F on the ventral side 1F and a back vertical end 40R on the dorsal side 1R, and extends over the entire length in the vertical direction X of the crotch 1M. As shown in FIGS. 2 and 3, the skin-side core wrap sheet 41 has substantially the same size as the skin facing surface of the absorbent core 40, whereas the non-skin-side core wrap sheet 42 absorbs the skin. The length (that is, the width) in the lateral direction Y is greater than the non-skin facing surface of the conductive core 40. The wide non-skin side core wrap sheet 42 covers the whole area of the non-skin facing surface of the absorbent core 40 and extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent core 40. The extending portion is wound up on the skin-side core wrap sheet 41 disposed to face the skin-facing surface of the absorbent core 40, and covers both side edges along the longitudinal direction X of the skin-side core wrap sheet 41. Yes.

In the present specification, the “skin-facing surface” is a surface of the absorbent article or a component thereof (for example, the absorbent main body 5) that is directed toward the wearer's skin when the absorbent article is worn, that is, relatively. The side close to the skin of the wearer, and the “non-skin facing surface” is the side opposite to the skin side when the absorbent article is worn, that is, relatively far from the wearer's skin. It is the surface that is directed to the side. Moreover, in this specification, "at the time of wearing" means the state where the normal appropriate wearing position, that is, the correct wearing position of the absorbent article is maintained, and the absorbent article is in a state of being deviated from the wearing position. Does not include cases.

The absorbent core 40 has a single layer structure in which a core forming material including an absorbent material is stacked. As the absorbent material, those normally used as a material for forming this type of absorbent core can be used without any particular limitation. For example, hydrophilic fibers such as wood pulp, synthetic fibers treated with a hydrophilizing agent, and water absorption Include polymer particles. That is, the absorbent core 40 may be a hydrophilic fiber stack or a structure in which water-absorbing polymer particles are supported on the stack. As the

core wrap sheets

41 and 42, for example, paper, nonwoven fabric, or the like can be used.

As shown in FIGS. 1 and 2, the absorbent core 40 in the crotch 1M is formed with a non-stacked fiber portion 45 extending in the vertical direction. More specifically, as shown in FIG. 1, in the diaper 1, a pair of

non-stacking portions

45, 45 extending in the vertical direction X are vertically centered in the vertical direction X by dividing the diaper 1 into the horizontal direction Y. They are formed symmetrically with respect to the line CLx. Each non-stacking portion 45 has a rectangular shape in plan view, and the longitudinal direction thereof coincides with the longitudinal direction X. On the skin facing surface of the absorbent core 40, the length (that is, the width) of each non-stacked portion 45 in the lateral direction Y is constant over the entire length in the longitudinal direction (longitudinal direction X). Also in the 40 non-skin facing surfaces, the width of each non-stacked portion 45 is constant over the entire length in the longitudinal direction.

As illustrated in FIG. 2, the non-stacked fiber portion 45 in the diaper 1 is a through-hole (that is, the basis weight is zero) in which the core forming material constituting the absorbent core does not exist at all. However, the non-stacked fiber portion according to the present invention has a smaller amount (specifically, about 20 g / m ² ) than the other region of the absorbent core in addition to the shape of the through-hole as in the non-stacked fiber portion 45. The form in which the core forming material is slightly present is also included. This is because even the non-stacked fiber portion composed of such a small amount of fiber-filled portions exhibits the same effects (liquid diffusion action and the like) as the non-stacked fiber portion composed of the through holes. In consideration of the liquid diffusion effect and the like, the non-stacked fiber portion composed of the through holes is preferable to the non-stacked fiber portion composed of the small amount of stacked fiber portions.

As shown in FIG. 1, the non-stacking portion 45 is located on the dorsal side from the inner position in the longitudinal direction X with respect to the abdominal side longitudinal end 40F of the absorbent core 40 in the abdominal side portion 1F via the crotch 1M. It continues over the inward position of the vertical direction X rather than the back side vertical direction end 40R of the absorbent core 40 in the part 1R. That is, the non-stacking portion 45 has a ventral vertical end 45F on the ventral portion 1F, and the ventral vertical end 45F is located in the vertical direction X more than the ventral vertical end 40F of the absorbent core 40. The core forming material constituting the absorbent core 40 is present in a larger amount than the non-stacked fiber portion 45 between the longitudinal ends 45F and 40F. Further, the non-stacking portion 45 has a back side longitudinal direction end 45R on the back side portion 1R, and the back side longitudinal direction end 45R is more in the longitudinal direction X than the back side longitudinal direction end 40R of the absorbent core 40. The core forming material constituting the absorbent core 40 is present in a larger amount than the non-stacked fiber portion 45 between the longitudinal ends 45R and 40R.

The non-stacking portion 45 (the non-stacking portion including the through holes) intentionally inhibits the core forming material from being stacked in the fiber forming process of the core forming material such as wood pulp at the time of manufacturing the absorbent core 40. It is a part formed. The absorbent core 40 having the non-stacked fiber portion 45 can be manufactured in accordance with a conventionally known method for manufacturing an absorbent core. For example, a core forming material that is supplied in an air flow is formed on the outer peripheral surface of the rotating drum. In the method of obtaining the absorbent core 40 by sucking and depositing on the formed mold, the part corresponding to the predetermined pattern of the mold, for example, the non-stacked portion 45, is located above the peripheral part. It can be manufactured by using a protruding mold. In the absorbent core 40 obtained by such a method, a portion where no core forming material is present is a non-stacked fiber portion 45. In addition, as another manufacturing method of the absorbent core 40 having the non-stacked fiber portion 45, an absorbent core not having the non-stacked fiber portion is manufactured, and a die cutting process or a cutting process is performed on a predetermined portion of the absorbent core. A method of forming a non-stacked portion by performing post-processing such as the above can also be adopted. The absorptive core which has the above-mentioned "non-stacked part consisting of a small amount of stacked parts" can also be produced according to the above method.

As shown in FIG. 2, the skin-side core wrap sheet 41 and the non-skin-side core wrap sheet 42 are joined at the non-stacking portion 45. With such a configuration, the adhesiveness between the absorbent core 40 and both

sheets

41 and 42 is improved, so that the shape retention of the absorbent core 40 disposed between both

sheets

41 and 42 is improved, and the absorbent core is improved. Even if the absorbent material such as the water-absorbing polymer particles contained in the core forming material constituting 40 swells by absorbing excretory fluid such as urine, the degree of deformation of the absorbent core 40 is suppressed. In addition, the skin-side core wrap sheet 41 is bonded to the top sheet 2 with an adhesive, and the non-skin-side core wrap sheet 42 is bonded to the back sheet 3 with an adhesive. Since the movement of the absorbent body 4 is restricted, it is difficult for the absorbent body 4 to move relative to the top sheet 2 and the back sheet 3 while the diaper 1 is worn. Therefore, the absorber 4 (absorbent core 40) is not easily broken during use of the diaper 1, and excellent absorption performance can be stably exhibited. In addition, with such a configuration, the excretion of the excretory fluid by the absorbent core 40 is improved, and the non-stacked portion 45 is effectively prevented from being buried due to the swelling of the absorbent material contained in the core forming material. .

The joint part of both

sheets

41 and 42 in the non-stacking fiber part 45 can be formed as follows, for example. That is, an adhesive such as a hot melt adhesive is applied in advance to a position corresponding to the non-stacking portion 45 in at least one of the

sheets

41 and 42, and the absorbent core 40 is covered with the

sheets

41 and 42. After the absorbent body 4 is obtained, the sheets 41 and / or the sheet 42 are pushed into the non-stacked fiber portion 45 so that the

sheets

41 and 42 can be joined at the non-stacked fiber portion 45. When the

sheets

41 and 42 are pushed in, a known embossing process such as embossing or ultrasonic embossing with or without heat may be used. In the diaper 1, the joint part of both

sheets

41 and 42 is unevenly distributed in the thickness direction of the absorber 4 in the non-skin opposing surface side, ie, the back surface sheet 3 side, and the non-skin side core wrap is shown in FIG. The sheet 42 is flat, but the skin-side core wrap sheet 41 is recessed in a concave shape at the position where the non-stacking portion 45 is formed. Moreover, in this embodiment, the junction part of both the

sheets

41 and 42 is continuing over substantially the full length of the vertical direction X of the non-stacking fiber part 45. FIG. Here, “substantially full length” means 90% or more of the full length.

As shown in FIG. 1 to FIG. 3, side sheets 51 are arranged on both the left and right sides along the longitudinal direction X on the surface sheet 2 side of the absorbent main body 5. The side seat 51 has an inner edge along the vertical direction X, and an outer edge along the vertical direction X located outside the inner edge in the lateral direction Y, as shown in FIG. In view, the inner edge of the side sheet 51 overlaps with the absorber 4, and the outer edge of the side sheet 51 extends outward from the side edge along the longitudinal direction X of the absorber 4 in the lateral direction Y, 3 is joined. An elastic member 52 for forming a thread-shaped three-dimensional gather is fixed to the inner edge of the side seat 51 in an elongated state along the longitudinal direction X. Accordingly, when the diaper 1 is worn, at least the crotch is caused by contraction of the elastic member 52. A solid gather is formed in the portion 1M.

As shown in FIG. 1, the absorbent main body 5 extends outwardly in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 (absorbent core 40) from the ventral side 1 </ b> F to the dorsal side 1 </ b> R. It has a pair of

side flap parts

50 and 50 extending. As shown in FIGS. 2 and 3, the side flap portion 50 extends outward in the lateral direction Y from the side edge along the longitudinal direction X of the absorbent body 4 in each of the top sheet 2, the back sheet 3 and the side sheet 51. The

sheet

2, 3, 51 is joined to each other by a known joining means such as an adhesive, heat seal, ultrasonic seal or the like. Both

side edge portions

5S, 5S along the longitudinal direction X of the absorbent main body 5 are formed of side flap portions 50.

As shown in FIGS. 1 and 2, each of the pair of

side flap portions

50, 50 is provided with a thread-like leg gathering elastic member 53 extending in the longitudinal direction X through the crotch 1M. Has been. The side flap part 50 in the crotch part 1M is a part functioning as a so-called leg part arranged around the wearer's leg when the diaper 1 is worn. With this configuration, the leg part has a portion when the diaper 1 is worn. A pair of leg gathers is formed by the contraction of the elastic member 53.

The pair of

fastening members

8 and 8 are fixed to the absorbent main body 5 so as to extend outward in the lateral direction Y from the side edges 5S of the absorbent main body 5, as shown in FIGS. A stretchable side panel 6 and a fastening tape 7 fixed to the side panel 6 so as to extend outward in the lateral direction Y from the front end portion 6S of the side panel 6 in the extending direction. Has been. The fastening member 8 (side panel 6, fastening tape 7) is a separate member from the absorbent main body 5.

As shown in FIGS. 1 and 3, the side panel 6 is fixed in a stretched state between two

panel members

61, 61 having a quadrangular shape in plan view, and the two

panel members

61, 61, and in the lateral direction Y. And a plurality of elastic members 62 extending. The plurality of elastic members 62 are arranged at predetermined intervals in the vertical direction X at the central portion in the horizontal direction Y of the side panel 6. The arrangement part (central part of the horizontal direction Y) of the elastic member 62 in the side panel 6 is an expansion / contraction part that can expand and contract in the horizontal direction Y that is the extension direction of the elastic member 62, and the side panel 6 can be expanded and contracted by such an expansion / contraction part. It has elasticity in the lateral direction Y. Of the side edges along the vertical direction X of the side panel 6, the side edge 51 and the back surface of the side edge 5S (side flap part 50) of the absorbent main body 5 are the inner edges relatively close to the vertical center line CLx. A fixed portion 60 between the side panel 6 and the absorbent main body 5 is formed between the sheet 3 and a known bonding means such as an adhesive, and an outer edge or extension relatively far from the longitudinal center line CLx. The outgoing direction front end 6 </ b> S side is located outward in the lateral direction Y from the side edge 5 </ b> S of the absorbent main body 5.

Fastening tape 7 includes a tape base 71 and a fastening portion 72 as shown in FIGS. 1 and 3. The tape base 71 has a rectangular shape in a plan view as shown in FIG. 1, and one end side in the longitudinal direction (lateral direction Y) is a well-known adhesive such as an adhesive on the non-skin facing surface of the front end portion 6S of the side panel 6 The fixing part 70 with the side panel 6 of the fastening tape 7 is formed by being fixed by the joining means. A fastening portion 72 is fixed to the inner surface (skin facing surface) of the portion extending in the lateral direction Y from the front end portion 6S of the side panel 6 in the tape substrate 71. The fastening portion 72 is made of a male member of a mechanical hook-and-loop fastener, and can be detachably fastened to a to-be-attached region 9 made of a female member of a mechanical hook-and-loop fastener, which will be described later.

Examples of the panel material 61 constituting the side panel 6 include non-woven fabrics, woven fabrics, knitted fabrics, paper, resin films, and the like by various manufacturing methods such as air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric. , And a sheet material obtained by laminating and integrating these two or more can be used. Moreover, as the tape base material 71 which comprises the fastening tape 7, a laminated body of a nonwoven fabric, a nonwoven fabric, and a resin film etc. can be used, for example.

As shown in FIG. 1, a non-skin facing surface of the absorbent main body 5 in the abdominal side portion 1F is formed with a securing region 9 made of a female member of a mechanical surface fastener. The to-be-attached region 9 is fixed to the non-skin facing surface (outer surface) of the back sheet 3 that forms the non-skin facing surface of the absorbent main body 5 by a known joining means such as an adhesive. The fastening portion 72 of the fastening tape 7 formed of a male member of a mechanical surface fastener can be detachably fastened.

Further, as shown in FIG. 1,

ventral flaps

55, 55 are formed on both side edges 5S, 5S along the longitudinal direction X of the absorbent main body 5 in the ventral side 1F. The ventral flap 55 is made of a non-stretchable sheet material, and the sheet material has a side edge portion 5S (side flap portion 50) on the side edge portion 5S of the absorbent main body 5 in the same manner as the side panel 6. It is being fixed between the sheet | seat 51 and the back surface sheet 3 by well-known joining means, such as an adhesive agent.

As one of the main features of the diaper 1 having the above-described configuration, as shown in FIG. 1, the absorbent main body 5 is spread out in a planar shape and the pair of

side panels

6 and 6 are in a natural state. In this case, when a virtual straight line L1 passing through the side panel fixing point A and the fastening tape fixing point B is drawn for each of the pair of

fastening members

8 and 8, the intersection C of the two virtual straight lines L1 and L1. Or the back side vertical direction end 45R of the non-stacking part 45 is located in the vicinity of this intersection C, and the non-stacking part 45 is the ventral side vertical direction end of the absorbent core 40 from the back side vertical direction end 45R. The point extended in the vertical direction X toward 40F is mentioned.

Here, “in the vicinity of the intersection C” means that the absorbent main body 5 is located on the one side and the other side in the longitudinal direction X from the intersection C in the developed state of the absorbent main body 5 (diaper 1) as shown in FIG. It means within 15% of the total length in the vertical direction X, and is preferably located within a region of 10%.
In addition, the “expanded state of the absorbent main body 5” means a state in which the elastic main body 5 includes an elastic member (such as the elastic members 52 and 53) and the absorbent main body 5 is expanded in a planar shape.
Further, the “natural state of the side panel 6” means a non-extended state in which no external force is applied to the elastic member (the elastic member 62 or the like) constituting the side panel 6.

Further, as shown in FIG. 1, the “side panel fixing point A” is bonded to the absorbent main body 5 through a fixing portion 60 (bonding means such as an adhesive) of the side panel 6 with the absorbent main body 5. Part) in the innermost part in the vertical direction X and the outermost part in the horizontal direction Y. That is, the side panel fixing point A is a point located on the outermost side in the horizontal direction Y at the vertical end of the fixing portion 60 on the crotch 1M side. In addition, since the fixing | fixed part 60 in the form shown in FIG. 1 is the whole overlap part with the absorptive main body 5 in the side panel 6, the side panel fixing point A is the side edge along the vertical direction X of the absorptive main body 5. Although it is located on the portion 5S, for example, when the fixing portion 60 is located inward in the lateral direction Y with respect to the side edge portion 5S, the side panel fixing point A is in the lateral direction Y with respect to the side edge portion 5S. It will be located inward.

In addition, as shown in FIG. 1, the “fastening tape fixing point B” is a fixing portion 70 of the fastening tape 7 to the side panel 6 (the portion that is bonded to the side panel 6 via a bonding means such as an adhesive). Is located at the innermost side in the vertical direction X and the outermost side in the horizontal direction Y. That is, the fastening tape fixing point B is a point located on the outermost side in the horizontal direction Y at the vertical end of the fixing portion 70 on the crotch 1M side. Since the fixing portion 70 in the form shown in FIG. 1 is the entire overlapping portion of the fastening tape 7 with the side panel 6, the fastening tape fixing point B is located on the side edge along the longitudinal direction X of the side panel 6. However, for example, when the fixing portion 70 is located inward in the lateral direction Y from the side edge portion, the fastening tape fixing point B is located inward in the lateral direction Y from the side edge portion. It will be.

As a typical wearing operation when the mother puts the diaper 1 on the infant, the abdomen side portion 1F, the crotch portion 1M, and the back side portion 1R of the diaper 1 are the corresponding parts of the infant with the infant lying on its back. From that state, the tip of each of the pair of

fastening tapes

7, 7 is gripped with fingers and pulled to the abdomen side 1F side, and the fastening part 72 of each fastening tape 7 is attached to the abdomen side part 1F. The operation to fix to 9 is mentioned. The imaginary straight line L1 connecting the side panel fixing point A and the fastening tape fixing point B described above substantially coincides with the line of force when the fastening tape 7 is pulled in the mounting operation of the diaper 1, and The intersection C of the virtual straight lines L1 and L1 is a point where a tensile force acts when the fastening tape 7 is gripped and the diaper 1 is pulled up. In the process of pulling and fastening the fastening tape 7 toward the abdomen 1F side, the diaper 1 bends toward the wearer's skin with the imaginary straight line L1 as a fold, and the ventral side (front side) in the longitudinal direction X from the fold. The portions (the crotch part 1M and the abdominal side part 1F) located in the are arranged so as to follow the wearer's crotch.

In a conventional unfolded disposable diaper, a portion corresponding to the intersection C of the diaper 1 when the fastening tape is pulled up by pulling the fastening tape in the mounting process, the back of the wearer's body, particularly the back of the buttocks. It is easy to get caught in the end of the side, so there is a problem that unintentional wrinkles and folds enter the part of the conventional diaper that is placed in the crotch of the wearer, sufficient fit is not obtained, and it tends to lead to leakage . Generally, a fastening tape is provided on the back side of the buttock in the human body, since the surface shape of the series of parts from the waist around the back to the crotch including the end is relatively large. Intersection C, which is the point of action of the tensile force when pulling, is easily caught at the end, and such a catching with the body at intersection C causes unintended wrinkles and breaks in the diaper. And, when such wrinkles or creases occur on the skin facing surface (surface sheet side) of the diaper, a gap is formed between the skin facing surface and the wearer's skin, so that the fit of the diaper is reduced and worn. There is a risk that the person's excretory fluid will leak outside through the gap.

On the other hand, in the diaper 1 of the present embodiment, as shown in FIG. 1, the non-filament portion 45 that is less rigid than the peripheral portion and easily folds when the diaper 1 bends is at the intersection C or Since it extends along the longitudinal direction X corresponding to the wearer's front-rear direction from the vicinity toward the abdominal side portion 1F, as described above, the fastening tape 7 is pulled to the abdominal side portion 1F side and fixed. In the process, as shown in FIG. 4 and FIG. 5, a crease mainly occurs along the two imaginary straight lines L1 and L1 in the back side portion 1R, and the two folds (virtual straight lines L1 and L1) and substantially the same. Therefore, a crease mainly occurs along the non-stacking portion 45 in the crotch portion 1M so as to be continuous. As a result, when the diaper 1 is worn, the crotch portion 1M bends to the non-skin facing surface side (the back sheet 3 side) with the two

non-stacking portions

45, 45 as folds, as shown in FIG. The

non-stacked fiber portions

45, 45 fit the hips of the wearer's crotch. In addition, the code | symbol 100 in FIG.4 and FIG.5 has shown the wearer.

In this way, the diaper 1 allows an ideal wearing state with good fit by a normal wearing operation, and “a fold line substantially continuous from the back side portion 1R to the crotch portion 1M” is a specific part. Since it is designed to be formed only on the virtual straight line L1 and the non-stacked fiber portion 45, unintended wrinkles and folds are unlikely to occur in other parts than the specific part. That is, according to the diaper 1, an ideal wearing state with few unintentional wrinkles and breaks and good fit can be obtained only by wearing according to a conventional method without paying special attention during the wearing operation. Therefore, a high leakage prevention effect can be obtained. When the back side longitudinal direction end 45R of the non-stacking portion 45 is not located at the intersection C or in the vicinity thereof and is too far from the intersection C, unintentional wrinkles and folds frequently occur in the wearing state. Satisfactory results in terms of performance and leakage prevention.

From the viewpoint of ensuring the effects of the formation of the folds more reliably, as shown in FIG. 1, the absorbent main body 5 is expanded in a flat shape to be in an unfolded state, and each of the pair of

side panels

6, 6. In the natural state, the ventral longitudinal end 53F of the leg gathering elastic member 53 in one of the pair of

side flap portions

50, 50, and the ventral longitudinal end 53F of the elastic member 53 in the other Are in the same position in the vertical direction X, and when one virtual straight line L2 extending in the horizontal direction through the two ventral side vertical ends 53F and 53F is drawn, the virtual straight line L2 or the virtual straight line L2 It is preferable that the ventral | vertical side direction direction end 45F of the non-stacking part 45 is located in the site | part which is near the intersection C rather than the virtual straight line L2. With such a configuration, the non-stacked fiber portion 45 that fits so as to be able to follow the buttocks in the crotch portion of the wearer and the pair of leg gathers that fit so as to be able to follow around the wearer's legs act synergistically. Therefore, the fit and leakage prevention effect can be further improved. Wearing the diaper 1 due to the influence of the non-stacking portion 45 when the ventral-side longitudinal end 45F of the non-stacking portion 45 is located near the ventral-side longitudinal end 5F of the absorbent main body 5 beyond the virtual straight line L2. Sometimes it becomes easy to get wrinkles into the ventral portion 1F.

As used herein, “a portion near the virtual straight line L2 and closer to the intersection C than the virtual straight line L2” refers to the unfolded state of the absorbent main body 5 (diaper 1) and the pair of

side panels

6, 6 as shown in FIG. In each natural state, it means within 15% of the total length in the longitudinal direction X of the absorbent main body 5 from the virtual straight line L2 to the intersection C side (the crotch 1M side), and is located within a region within 10%. It is preferable.
Further, “the ventral longitudinal end 53F of the elastic member 53” means the ventral longitudinal end of the elastic member 53 having stretchability, and does not necessarily match the lengthwise ventral end of the elastic member 53. . That is, the “part having elasticity in the elastic member 53” is a part fixed to the side flap part 50 in an extended state, for example, a ventral end portion in the length direction of the elastic member 53 (that is, the length direction). If the ventral side end of the elastic member 53 is not stretchable, the ventral side longitudinal end 53F of the elastic member 53 is not stretched. "is not.

Further, from the same viewpoint, as shown in FIG. 1, when the absorbent main body 5 is expanded in a flat shape to be in an unfolded state and each of the pair of

side panels

6 and 6 is in a natural state, two virtual straight lines L1 , L1 is preferably located at the back longitudinal end 53R of the leg gathering elastic member 53. Thus, the elasticity which forms the leg gather which fits the circumference | surroundings of a wearer's leg in the vicinity of the virtual straight line L1 used as the line of force when the fastening tape 7 is pulled in the wearing operation of the diaper 1 and becomes a crease. Since the longitudinal end of the member 53 is positioned, the fit of the crotch part 1M to the wearer's crotch part can be further improved, and the leakage prevention effect can be further improved.

Here, “in the vicinity of the virtual straight line L1” means the longitudinal direction from the virtual straight line L1 in the unfolded state of the absorbent main body 5 (diaper 1) and the natural state of each of the pair of

side panels

6 and 6, as shown in FIG. On one side and the other side of X, it means within 15% of the total length of the absorbent body 5 in the longitudinal direction X, and is preferably located within a region of 10%.
Further, “the back side longitudinal end 53R of the elastic member 53” means the back side longitudinal direction end of the elastic member 53 having stretchability, like the “abdominal side longitudinal end 53F of the elastic member 53”. To do.

From the viewpoint of further improving the fit, the length W (see FIG. 1) along the vertical direction from the back longitudinal end 5R of the absorbent main body 5 to the intersection C of the two virtual straight lines L1, L1 is The total length of the absorbent main body 5 in the longitudinal direction X is preferably 30 to 50%, particularly preferably 35 to 45%.

Moreover, since the flexibility of the diaper 1 (crotch part 1M) in the non-stacking fiber part 45 improves, the length (namely, width | variety) of the horizontal direction Y of the non-stacking fiber part 45 increases, Although a crease is easily formed, the increase in the width of the non-stacked portion 45 leads to a decrease in the absorption performance of the absorbent core 40. In consideration of such points, from the viewpoint of the balance between the flexibility in the non-stacked fiber portion 45, that is, the ease of forming a fold and the absorption performance, the width of the non-stacked fiber portion 45 is the transverse direction Y of the absorbent core 40. Is preferably 3% or more, more preferably 5% or more, and preferably 30% or less, more preferably 25% or less, more specifically, preferably with respect to the narrowest part (ie, width). Is from 3% to 30%, more preferably from 5% to 25%.

The length in the longitudinal direction X of the non-stacked fiber portion 45 is preferably 25% or more, more preferably 30% or more, and preferably 50% with respect to the length of the absorbent core 40 in the longitudinal direction X. Hereinafter, it is more preferably 45% or less, more specifically, preferably 25% or more and 50% or less, more preferably 30% or more and 45% or less.

In addition, as shown in FIG. 2, the absorbent core 40 is configured on both sides of each non-stacked fiber portion 45 in the lateral direction Y in the arrangement site of the two

unstacked fiber portions

45, 45 in the absorbent core 40. There is a pile portion 46 in which the core forming material is present in a larger amount than the non-pile portion 45. That is, the absorbent core 40 in the diaper 1 has a pair of stacked

fibers

46, 46 located at both side edges along the longitudinal direction X of the absorbent core 40, and the two

non-stacked fibers

45, 45. Where there are a total of three stacking sections 46 with one existing stacking section 46, two non-stacking sections from the standpoint of both fit (flexibility of the non-stacking section 45) and absorption performance In the portion where the

fine portions

45, 45 are disposed, the length (ie, width) in the lateral direction Y of the absorbent core 40 is the narrowest, and the length (ie, width) in the transverse direction Y of these three pile portions 46. The ratio is preferably 1: 1: 1, ie uniform.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate.
For example, in the diaper 1 of the above embodiment, the number of non-stacked fiber portions is two, but in the present invention, the number of non-stacked fiber portions is not particularly limited, and, for example, in the lateral central portion of the absorbent core Only one may be formed, and three or more may be formed in parallel in the horizontal direction. Considering the absorption performance of the absorbent core, etc., the number of unstacked portions is preferably 1 to 3, and the central portion (excretion portion) in the lateral direction Y of the absorbent core 40 in the crotch 1M, particularly like the diaper 1 A configuration in which the fiber stacking portion 46 is disposed in a region including the facing portion and two non-fiber stacking

portions

45 and 45 are disposed on both sides in the lateral direction Y of the fiber stacking portion 46 is preferable.
Further, the absorbent article of the present invention is not limited to the deployable disposable diaper as in the above-described embodiment, but is an article (deployment) used for absorbing bodily fluids (urine, menstrual blood, loose stool, sweat, etc.) discharged from the human body. For example, a diaper cover and a pad holder are also included.
The following additional notes are disclosed with respect to the embodiment of the present invention described above.

<1>
A longitudinal direction extending from the wearer's abdomen through the crotch portion to the back side and a transverse direction perpendicular thereto; and a crotch portion arranged in the crotch portion when worn; Having a ventral side portion arranged on the ventral side and a dorsal side portion arranged on the back side of the wearer from the crotch portion in the longitudinal direction;
It has an absorptive main body constituted including an absorptive core by which a core forming material is piled up, and a pair of fastening members are provided on both side edges along the longitudinal direction of the absorptive main body in the back side part. An absorbent article fixed so as to extend laterally outward from both side edges,
The absorbent core in the crotch is formed with a non-stacked fiber portion extending in the longitudinal direction,
Each of the pair of fastening members includes a stretchable side panel fixed to the absorbent main body so as to extend laterally outward from a side edge of the absorbent main body, and an extension of the side panel. A fastening tape fixed to the side panel so as to extend laterally outward from the directional tip.
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
A portion located on the innermost side in the vertical direction and the outermost side in the horizontal direction in the fixing part of the side panel with the absorbent main body is a side panel fixing point,
The fastening tape fixing point is a portion located at the innermost side in the vertical direction and the outermost side in the horizontal direction in the fixing part of the fastening tape to the side panel,
When a virtual straight line L1 passing through the side panel fixing point and the fastening tape fixing point is drawn for each of the pair of fastening members,
The back-side longitudinal end of the non-stacked fiber portion is positioned at or near the intersection of the two virtual straight lines L1, and the non-stacked fiber portion extends from the back-side longitudinal direction end to the absorbent core. Absorbent article extending in the longitudinal direction toward the ventral side longitudinal end.

<2>
The absorbent main body has a pair of side flap portions extending laterally outward from both side edges along the longitudinal direction of the absorbent core from the ventral side portion to the dorsal side portion, In each side flap part, an elastic member for leg gather formation is arranged in an extended state so as to extend in the vertical direction through the crotch part,
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
The ventral vertical end of the leg gather forming elastic member in one of the pair of side flap portions and the other in the vertical direction are in the same position in the vertical direction, and pass through both the ventral vertical ends. When one virtual straight line L2 extending in the direction is drawn, on the virtual straight line L2 or in the vicinity of the virtual straight line L2 and closer to the intersection than the virtual straight line L2, the ventral side longitudinal direction of the non-stacked fiber portion The absorbent article according to <1>, wherein an end is located.
<3>
A portion near the imaginary straight line L2 and closer to the intersection than the imaginary straight line L2 has a length of 15 in the longitudinal direction of the absorbent main body from the imaginary straight line L2 to the intersection in the expanded state and the natural state. % Of the absorbent article according to the above <2>.

<4>
The absorbent main body has a pair of side flap portions extending laterally outward from both side edges along the longitudinal direction of the absorbent core from the ventral side portion to the dorsal side portion, In each side flap part, an elastic member for leg gather formation is arranged in an extended state so as to extend in the vertical direction through the crotch part,
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
The absorbent article according to any one of <1> to <3>, wherein the back-side longitudinal end of the leg gathering elastic member is positioned in the vicinity of each of the two virtual straight lines L1.
<5>
The vicinity of the imaginary straight line L1 is a region within 15% of the total length in the longitudinal direction of the absorbent main body on each of one side and the other side in the longitudinal direction from the imaginary straight line L1 in the expanded state and the natural state. The absorbent article as described in <4>.
<6>
The length along the vertical direction from the back longitudinal end of the absorbent main body to the intersection of the two imaginary straight lines L1 is 30 to 50% of the total longitudinal length of the absorbent main body, preferably 35 to The absorbent article according to any one of <1> to <5>, which is 45%.

<7>
The back side longitudinal end of the non-stacked fiber portion is within the intersection of the two virtual straight lines L1, or within 15% of the longitudinal length of the absorbent main body on the one side and the other side in the longitudinal direction from the intersection. The absorbent article according to any one of the above items <1> to <6>, which is located in the region of
<8>
The lateral length or width of the unstacked portion is preferably 3% or more, more preferably 5% or more, with respect to the portion having the smallest lateral length or width of the absorbent core, and The absorbent article according to any one of <1> to <7>, preferably 30% or less, more preferably 25% or less.
<9>
The longitudinal length of the non-stacked fiber portion is preferably 25% or more, more preferably 30% or more, and preferably 50% or less, more preferably, with respect to the length of the absorbent core in the longitudinal direction. Is 45% or less, more specifically, preferably 25% or more and 50% or less, and more preferably 30% or more and 45% or less. .
<10>
In the absorbent core, a pair of the non-stacked fiber portions are present at a predetermined interval in the lateral direction, and the laterally outward sides of the pair of non-stacked fiber portions and the pair of non-stacked fiber portions In a total of three places, the core forming material constituting the absorbent core is present in a larger amount than the non-stacked fiber portion, and there is a stacked fiber portion,
In the absorbent core, the lateral length of each of the three stacked fiber portions in the portion where the lateral length of the absorbent core, that is, the width, is the narrowest among the arrangement portions of the pair of non-stacked fiber portions. The absorbent article according to any one of <1> to <9>, wherein the ratio of thickness or width is 1: 1: 1, that is, they are uniform with each other.

<11>
The absorbent article according to any one of <1> to <10>, wherein the non-stacked portion is a through hole in which a core forming material constituting the absorbent core is not present at all.
<12>
The non-stacking portion is located at the back side of the absorbent core in the dorsal side portion from the inward position in the longitudinal direction with respect to the ventral longitudinal end of the absorbent core in the ventral side portion through the crotch portion. The absorbent article according to any one of <1> to <11>, wherein the absorbent article is continuous over an inward position in a longitudinal direction rather than a side longitudinal end.
<13>
The absorbent core has its skin facing surface covered with a skin-side core wrap sheet, and its non-skin facing surface is covered with a non-skin-side core wrap sheet,
The absorbent article according to any one of <1> to <12>, wherein the skin-side core wrap sheet and the non-skin-side core wrap sheet are joined in the non-stacking portion.
<14>
The absorbent main body comprises a top sheet and a back sheet, the absorbent core is interposed between both sheets,
The absorbent article according to <13>, wherein the skin-side core wrap sheet is bonded to the top sheet with an adhesive, and the non-skin-side core wrap sheet is bonded to the back sheet with an adhesive.
<15>
The absorbent article according to any one of <1> to <14>, wherein the fastening member is a separate member from the absorbent main body.
<16>
The absorbent article according to any one of <1> to <15>, wherein the absorbent core has a single-layer structure.
<17>
The absorbent article according to any one of <1> to <16>, wherein the side panel fixing point is located inward in a lateral direction with respect to a side edge portion along a longitudinal direction of the absorbent main body. .
<18>
The absorbent article according to any one of <1> to <17>, wherein the fastening tape fixing point is located inward in a lateral direction with respect to a side edge portion along a longitudinal direction of the side panel.

ADVANTAGE OF THE INVENTION According to this invention, without paying special attention in the case of mounting | wearing operation, the absorbent article which fits a wearer's crotch part only by mounting | wearing according to a conventional method, and can show | play the high leak prevention effect is provided.

Claims

A longitudinal direction extending from the wearer's abdomen through the crotch portion to the back side and a transverse direction perpendicular thereto; and a crotch portion arranged in the crotch portion when worn; Having a ventral side portion arranged on the ventral side and a dorsal side portion arranged on the back side of the wearer from the crotch portion in the longitudinal direction;
It has an absorptive main body constituted including an absorptive core by which a core forming material is piled up, and a pair of fastening members are provided on both side edges along the longitudinal direction of the absorptive main body in the back side part. An absorbent article fixed so as to extend laterally outward from both side edges,
The absorbent core in the crotch is formed with a non-stacked fiber portion extending in the longitudinal direction,
Each of the pair of fastening members includes a stretchable side panel fixed to the absorbent main body so as to extend laterally outward from a side edge of the absorbent main body, and an extension of the side panel. A fastening tape fixed to the side panel so as to extend laterally outward from the directional tip.
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
A portion located on the innermost side in the vertical direction and the outermost side in the horizontal direction in the fixing part of the side panel with the absorbent main body is a side panel fixing point,
The fastening tape fixing point is a portion located at the innermost side in the vertical direction and the outermost side in the horizontal direction in the fixing part of the fastening tape to the side panel,
When a virtual straight line L1 passing through the side panel fixing point and the fastening tape fixing point is drawn for each of the pair of fastening members,
The back-side longitudinal end of the non-stacked fiber portion is positioned at or near the intersection of the two virtual straight lines L1, and the non-stacked fiber portion extends from the back-side longitudinal direction end to the absorbent core. Absorbent article extending in the longitudinal direction toward the ventral side longitudinal end.
The absorbent main body has a pair of side flap portions extending laterally outward from both side edges along the longitudinal direction of the absorbent core from the ventral side portion to the dorsal side portion, In each side flap part, an elastic member for leg gather formation is arranged in an extended state so as to extend in the vertical direction through the crotch part,
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
The ventral vertical end of the leg gather forming elastic member in one of the pair of side flap portions and the other in the vertical direction are in the same position in the vertical direction, and pass through both the ventral vertical ends. When one virtual straight line L2 extending in the direction is drawn, on the virtual straight line L2 or in the vicinity of the virtual straight line L2 and closer to the intersection than the virtual straight line L2, the ventral side longitudinal direction of the non-stacked fiber portion The absorbent article according to claim 1, wherein an end is located.
A portion near the imaginary straight line L2 and closer to the intersection than the imaginary straight line L2 has a length of 15 in the longitudinal direction of the absorbent main body from the imaginary straight line L2 to the intersection in the expanded state and the natural state. The absorbent article according to claim 2, wherein the absorbent article is in a region within%.
The absorbent main body has a pair of side flap portions extending laterally outward from both side edges along the longitudinal direction of the absorbent core from the ventral side portion to the dorsal side portion, In each side flap part, an elastic member for leg gather formation is arranged in an extended state so as to extend in the vertical direction through the crotch part,
In the case where the absorbent main body is expanded in a flat shape to be in an expanded state and the side panel is in a natural state,
The absorbent article according to any one of claims 1 to 3, wherein a back-side longitudinal end of the leg gathering elastic member is located in the vicinity of each of the two virtual straight lines L1.
The vicinity of the virtual straight line L1 is a region within 15% of the total length in the vertical direction of the absorbent main body on each of one side and the other side in the vertical direction from the virtual straight line L1 in the expanded state and the natural state. Item 5. An absorbent article according to Item 4.
2. The length along the longitudinal direction from the back longitudinal end of the absorbent main body to the intersection of the two virtual straight lines L1 is 30 to 50% of the total longitudinal length of the absorbent main body. The absorbent article according to any one of 1 to 5.
The back side longitudinal end of the non-stacked fiber portion is within the intersection of the two virtual straight lines L1, or within 15% of the longitudinal length of the absorbent main body on the one side and the other side in the longitudinal direction from the intersection. The absorbent article according to any one of claims 1 to 6, which is located in the region of
The lateral length of the non-stacked fiber portion is 3% or more and 30% or less with respect to the portion having the narrowest lateral length of the absorbent core. The absorbent article as described.
The absorptivity according to any one of claims 1 to 8, wherein a length in the longitudinal direction of the non-stacked fiber portion is 25% or more and 50% or less with respect to a length in the longitudinal direction of the absorbent core. Goods.
In the absorbent core, a pair of the non-stacked fiber portions are present at a predetermined interval in the lateral direction, and the laterally outward sides of the pair of non-stacked fiber portions and the pair of non-stacked fiber portions In a total of three places, the core forming material constituting the absorbent core is present in a larger amount than the non-stacked fiber portion, and there is a stacked fiber portion,
In the absorbent core, the lateral length of each of the three stacked fiber portions in the portion where the lateral length of the absorbent core, that is, the width, is the narrowest among the arrangement portions of the pair of non-stacked fiber portions. The absorbent article according to any one of claims 1 to 9, wherein the ratio of thickness or width is 1: 1: 1, that is, uniform to each other.
The absorbent article according to any one of claims 1 to 10, wherein the non-stacking portion is a through hole in which the core forming material constituting the absorbent core does not exist at all.
The non-stacking portion is located at the back side of the absorbent core in the dorsal side portion from the inward position in the longitudinal direction with respect to the ventral longitudinal end of the absorbent core in the ventral side portion through the crotch portion. The absorbent article according to any one of claims 1 to 11, which is continuous over an inner position in a longitudinal direction rather than a side longitudinal end.
The absorbent core has its skin facing surface covered with a skin-side core wrap sheet, and its non-skin facing surface is covered with a non-skin-side core wrap sheet,
The absorbent article according to any one of claims 1 to 12, wherein the skin-side core wrap sheet and the non-skin-side core wrap sheet are joined in the non-stacking portion.
The absorbent main body comprises a top sheet and a back sheet, the absorbent core is interposed between both sheets,
The absorptive article according to claim 13 in which said skin side core wrap sheet is joined to said surface sheet with an adhesive, and said non-skin side core wrap sheet is joined to said back sheet with an adhesive.
The absorbent article according to any one of claims 1 to 14, wherein the fastening member is a separate member from the absorbent main body.
The absorbent article according to any one of claims 1 to 15, wherein the absorbent core has a single-layer structure.
The absorbent article according to any one of claims 1 to 16, wherein the side panel fixing point is located inward in a lateral direction from a side edge portion along a longitudinal direction of the absorbent main body.
The absorbent article according to any one of claims 1 to 17, wherein the fastening tape fixing point is located inward in a lateral direction with respect to a side edge portion along a longitudinal direction of the side panel.