CN114667124B

CN114667124B - Absorbent article

Info

Publication number: CN114667124B
Application number: CN202080075775.9A
Authority: CN
Inventors: 多田干彦; 高阪翔士
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-11-08
Filing date: 2020-08-27
Publication date: 2023-05-23
Anticipated expiration: 2040-08-27
Also published as: CN114667124A; TW202120048A; WO2021090556A1; JP6869310B1; JP2021074280A

Abstract

The present invention provides an absorbent article which is less likely to cause discomfort to the wearer even when the wearer is walking or the like. The absorbent article of the present invention is an absorbent article comprising a front sheet (2), a back sheet (3), and an absorber (4) located between the sheets, wherein the absorber (4) has, in a plan view: at least one pair of folding guide parts (51, 52) for separating a width direction central line (C) extending along a length direction (L) _L ) Symmetrically configured; and at least one pair of concave parts (61, 62) positioned on the inner side in the width direction of the pair of buckling guiding parts (51, 52) and separated by the center line (C) in the width direction _L ) The pair of concave parts are symmetrically arranged, extend along the length direction (L), and the pair of buckling guiding parts (51, 52) extend from the width direction end edge of the absorber (4) towards the width direction inner side respectively and extend towards the length direction inner side along with the width direction inner side.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a light incontinence pad, a sanitary napkin, and a disposable diaper.

Background

Since absorbent articles such as light incontinence pads, sanitary napkins, disposable diapers and the like are worn for a long period of time while being in contact with the crotch of the wearer, rapid absorption of excreta discharged from the wearer, excellent fitting to the body of the wearer and the like are required in order to prevent discomfort, unpleasant feeling and the like from being produced by the wearer.

In order to improve the liquid absorbability and the fit, there is known an absorbent article in which a groove extending in a predetermined direction is formed in an absorber or an absorbent core.

For example, patent document 1 discloses an absorbent article having an absorbent core provided with a central region and side regions located on both sides in the width direction thereof, the central region and the side regions being separated at least in a crotch portion by side groove portions extending in the longitudinal direction of the absorbent core, and the side regions having a plurality of intersecting groove portions extending in a direction intersecting the longitudinal direction of the absorbent core, each intersecting groove portion having a specific structure intersecting the longitudinal direction of the absorbent core at an angle such that an imaginary extension line of the intersecting groove portions faces the central portion of the absorbent core.

The absorbent article disclosed in patent document 1 has side groove portions and intersecting groove portions functioning as curved guide portions of the absorbent core when worn, and therefore the side regions are flexibly deformed to improve the fit to the body of the wearer.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2018-122014

Disclosure of Invention

Problems to be solved by the invention

However, in the absorbent article disclosed in patent document 1, the fit during the movement of the wearer and the like is not considered, and the intersecting groove portions near the leg holes of the wearer do not extend to the widthwise end edges of the absorbent body, so that the absorbent body, and thus the absorbent article, may not be sufficiently deformed to follow the movement of the wearer during the movement of the wearer such as walking (specifically, during the movement of applying a force in a direction of alternately twisting the absorbent article laterally about the longitudinal axis), and discomfort may be caused to the wearer.

Accordingly, an object of the present invention is to provide an absorbent article which is less likely to cause discomfort to the wearer even when the wearer is walking or the like.

Means for solving the problems

An aspect (aspect 1) of the present invention is an absorbent article comprising a front sheet forming a skin-facing surface, a back sheet forming a non-skin-facing surface, and an absorber located between the sheets, the absorbent article having a longitudinal direction, a width direction, and a thickness direction,

the absorber has, in a plan view:

At least one pair of folding guide parts symmetrically arranged with respect to a widthwise center line extending in the longitudinal direction; and

at least one pair of concave parts which are positioned at the inner side of the pair of bending guide parts in the width direction and are symmetrically arranged with the center line in the width direction, and the at least one pair of concave parts extend along the length direction,

the pair of buckling guide portions extend from the widthwise end edges of the absorber toward the widthwise inner side, respectively, and extend so as to be directed toward the lengthwise inner side as directed toward the widthwise inner side.

In the absorbent article according to the present embodiment 1, since the bending guide portion functioning as the bending base point of the absorbent body extends from the widthwise end edge of the absorbent body toward the widthwise inner side and extends so as to be directed toward the lengthwise inner side along with the widthwise inner side, the absorbent body and thus the absorbent article are likely to be deformed following the movement of the wearer (hereinafter, the action of such bending guide portion is simply referred to as "follow deformation action") during the movement of the wearer during walking or the like (specifically, even when the movement is such as the force in the direction of alternately twisting the absorbent article left and right about the longitudinal axis), and the uncomfortable feeling of the wearer is unlikely to occur.

Further, since the absorbent article according to embodiment 1 has the pair of concave portions extending in the longitudinal direction at the positions on the widthwise inner side of the bending guide portion, even if a force in a direction of alternately twisting the absorbent article left and right about the longitudinal direction is applied to the absorbent article via the bending guide portion during the wearer's operation, the force can be dispersed by the pair of concave portions extending in the longitudinal direction, and the portion on the widthwise inner side of the pair of concave portions, that is, the widthwise central portion of the absorbent body can be made less deformable.

As described above, the absorbent article according to embodiment 1 can reliably adhere the widthwise central portion of the absorbent body to the crotch of the wearer in addition to the following deformation action of the bending guide portion, and therefore can exhibit excellent fitting properties even when the wearer is operating.

As described above, the absorbent article according to embodiment 1 is less likely to cause discomfort to the wearer even when the wearer is walking or the like, and can exhibit excellent fit.

In another aspect (aspect 2) of the present invention, the absorbent article according to aspect 1 is characterized in that,

the at least one pair of buckling guides includes: a pair of folding guides located on one side in the longitudinal direction with respect to a longitudinal direction center line extending in the width direction; a pair of folding guide parts positioned at the other side of the length direction,

The pair of folding guide portions located on one side in the longitudinal direction and the pair of folding guide portions located on the other side in the longitudinal direction are arranged so as to be symmetrical with each other across the longitudinal center line.

In the absorbent article according to embodiment 2, since the pair of folded guide portions located on one side in the longitudinal direction and the pair of folded guide portions located on the other side in the longitudinal direction are arranged so as to be symmetrical with each other across the longitudinal center line, the following deformation action by the folded guide portions can be exerted over a wide range in the longitudinal direction of the absorbent article when the wearer acts.

In a further aspect (aspect 3) of the present invention, the absorbent article according to the above aspect 1 or 2, characterized in that,

the at least one pair of folding guide portions are arranged such that virtual extension lines of the folding guide portions located on one side in the width direction with respect to the width direction center line do not overlap with virtual extension lines of the folding guide portions located on the other side in the width direction with respect to the width direction center line.

In the absorbent article according to aspect 3, at least one pair of folding guides is arranged such that an imaginary extension line of the folding guide portion located on one side in the width direction and an imaginary extension line of the folding guide portion located on the other side in the width direction with respect to the widthwise center line do not overlap on the same straight line, and therefore, a folding base point can be formed for each folding guide portion, the absorber can be easily deformed into a wider variety of shapes, and even if the above-described torsion direction force acts on the widthwise center portion of the absorber via the folding guide portion when the wearer operates, a folding base point is less likely to be formed in the widthwise center portion of the absorber, and folding of the widthwise center portion of the absorber can be less likely to occur.

In a further aspect (aspect 4) of the present invention, the absorbent article according to any one of aspects 1 to 3, characterized in that,

the absorber is joined to the front sheet or the intermediate sheet on the skin-facing surface side via an adhesive layer,

the adhesive layer has a portion intersecting with an imaginary line parallel to the longitudinal direction in a plan view, and extends in the longitudinal direction.

The absorbent article of embodiment 4 is joined to the front sheet or the intermediate sheet of the absorbent body on the skin-facing surface side via the adhesive layer, and therefore the absorbent body is less likely to be deformed even when the wearer is in motion, and can exhibit more excellent fit.

In the absorbent article according to embodiment 4, since the adhesive layer has a portion intersecting the longitudinal direction in a plan view and the adhesive layer extends in the longitudinal direction (for example, is arranged in a spiral shape, an omega shape, or the like along the longitudinal direction), the adhesive layer is less likely to cause absorption inhibition by the adhesive layer, and the bending guide portion is not inhibited from following deformation even when a force in the twisting direction is applied, so that the absorbent article can reliably follow the movement of the wearer to deform.

In a further aspect (aspect 5) of the present invention, the absorbent article according to any one of aspects 1 to 4, characterized in that,

the absorbent article has a skin-facing side absorbent layer at a position closer to the skin-facing side than the absorbent body,

the skin facing surface side absorbent layer has a width direction length of a portion overlapping the pair of folding guide portions in the thickness direction that is greater than a width direction length of a portion of the absorbent body having the pair of folding guide portions.

In the absorbent article according to embodiment 5, since the width direction length of the portion of the skin facing surface side absorbent layer overlapping the pair of folding guides in the thickness direction is longer than the width direction length of the portion of the absorbent body having the pair of folding guides, torsion due to deformation of the folding guides can be made difficult to occur before the excreta such as urine is supplied from the wearer. As a result, the absorbent article according to embodiment 5 can exhibit more excellent fit, and leakage of excreted liquid due to torsion can be less likely to occur.

In a further aspect (aspect 6) of the present invention, the absorbent article according to the above aspect 5 is characterized in that,

The skin-facing side absorbent layer comprises at least an absorbent polymer.

In the absorbent article according to embodiment 6, since the skin-facing surface side absorbent layer contains at least the absorbent polymer, when the excreta liquid such as urine is supplied from the wearer, the skin-facing surface side absorbent layer absorbs the excreta liquid and swells, and twisting of the absorbent body on the non-skin-facing surface side of the skin-facing surface side absorbent layer can be less likely to occur. As a result, the absorbent article according to embodiment 6 is easy to maintain excellent fit even after excretion by the wearer, and leakage of excreted liquid due to torsion can be prevented.

In a further aspect (aspect 7) of the present invention, the absorbent article according to any one of aspects 1 to 6, characterized in that,

the pair of buckling guide portions communicate with the pair of concave portions at their widthwise inward end portions in plan view.

In the absorbent article according to aspect 7, since the pair of buckling guide portions communicate at the widthwise inner ends thereof with the pair of concave portions, the torsional force transmitted through the buckling guide portions during the operation of the wearer is more easily dispersed in the pair of concave portions, and the widthwise central portion of the absorbent body is less likely to be deformed.

In a further aspect (aspect 8) of the present invention, the absorbent article according to any one of aspects 1 to 7, characterized in that,

the absorbent article has at least 2 fold lines extending in the width direction in a plan view,

the pair of folding guide portions are disposed so as not to intersect the folding line.

Since the absorbent article of embodiment 8 has at least 2 folding lines extending in the width direction, and the pair of folding guide portions are disposed so as not to intersect these folding lines, the absorbent article can be folded compactly, and the folding base point using the folding wrinkles by the folding lines can be formed while excellent in storage property, portability, and the like, and therefore the absorbent article can be easily deformed into a wider variety of shapes without inhibiting the following deformation action by the pair of folding guide portions.

In a further aspect (aspect 9) of the present invention, the absorbent article according to any one of aspects 1 to 8, characterized in that,

the absorbent article has an adhesive portion arranged on the surface of the back sheet on the non-skin-facing surface side,

the pair of folded guide portions are disposed so as not to overlap the adhesive portion or partially overlap the adhesive portion in the thickness direction.

The absorbent article according to embodiment 9 has the adhesive portions for fixing to the clothing worn by the wearer's underwear or the like, and the pair of buckling guide portions are disposed so as not to entirely overlap the adhesive portions in the thickness direction, so that the absorbent article can be fixed to the clothing worn by the wearer without inhibiting the following deformation action of the pair of buckling guide portions, and excellent fitting performance can be more stably exhibited.

In still another aspect (aspect 10) of the present invention, the absorbent article according to the aspect 9 is characterized in that,

the adhesive portion is disposed at least at a position on the outer side in the longitudinal direction than the pair of folding guide portions in plan view.

In the absorbent article according to the aspect 10, since the adhesive portion is disposed at least at the outer side in the longitudinal direction than the bending guide portion, even if the bending guide portion functions as a bending base point, the outer side in the longitudinal direction of the bending guide portion can be reliably fixed to the clothing of the wearer, and the absorbent article is less likely to be rolled up or peeled off during wearing.

In still another aspect (aspect 11) of the present invention, the absorbent article according to any one of aspects 1 to 10,

The absorbent article further includes a pair of leakage preventing wall portions including, in a plan view: a pair of side sheets which are positioned at both ends in the width direction and are arranged on the skin facing surface side surface of the front sheet so as to extend in the longitudinal direction; and an elastic member fixed to each of the pair of side sheets and extending in the length direction,

the fixed end of the elastic member in the longitudinal direction is located at a position outside the virtual extension line of the pair of folding guide parts in the longitudinal direction.

In the absorbent article according to embodiment 11, since the longitudinal fixed end of the elastic member is located on the outer side in the longitudinal direction from the virtual extension line of the pair of folding guide portions, and the leakage preventing wall portion can be formed on the outer side in the longitudinal direction of the folding guide portions, the folding guide portions function as folding base points when the absorbent article is worn, and leakage of excreta can be prevented even if the absorbent article deforms following the movement of the wearer.

In a further aspect (aspect 12) of the present invention, the absorbent article according to any one of aspects 1 to 11, characterized in that,

the absorber has a narrowed portion having a relatively small width-wise length at a longitudinal center portion in a plan view,

The pair of folded guide portions are disposed in the narrowed portions, respectively.

In the absorbent article according to the aspect 12, since the bending guide portion is disposed at the narrowed portion corresponding to the leg circumference of the wearer, the bending guide portion is easily deformed in accordance with the movement of the leg of the wearer, and the following deformation function can be more reliably exerted.

In a further aspect of the invention (aspect 13), a light incontinence pad according to aspect 12 above, characterized in that,

the pair of folded guide portions are located between a maximum width portion having a maximum width of the absorber and a minimum width portion having a minimum width of the absorber at the narrowed portion, and are located further to the outside in the longitudinal direction than a longitudinal intermediate position between the maximum width portion and the minimum width portion.

In the absorbent article according to aspect 13, since the end portion on the outer side in the width direction of the bending guide portion is located at the specific portion, even when the movement of the leg of the wearer is large, the bending guide portion can be reliably deformed according to the movement, and the effect of aspect 12 can be more stably and reliably exhibited.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, an absorbent article having excellent fit and less discomfort to the wearer even when the wearer is walking or the like can be provided.

Drawings

Fig. 1 is a plan view as seen from the front sheet 2 side in the thickness direction T in a state where the light incontinence pad 1 of one embodiment of the absorbent article of the present invention is developed.

Fig. 2 is a plan view as seen in the thickness direction T from the back sheet 3 side in a state where the light incontinence pad 1 is developed.

Fig. 3 is an enlarged end view of a major part of a cross section along the line III-III of the light incontinence pad 1 shown in fig. 1.

Fig. 4 is a plan view of the absorbent body 4 of the light incontinence pad 1 as seen from the skin-facing surface side in the thickness direction T.

Fig. 5 is a perspective view schematically showing a case where the light incontinence pad 1 is bent and deformed at the bending guide portions 51 to 54.

Fig. 6 is a plan view schematically showing an arrangement of the adhesive layer H disposed on the skin-facing surface side of the absorber 4.

Fig. 7 is a plan view as seen from the front sheet 2 side in the thickness direction T in a state where the light incontinence pad 1' of another embodiment of the absorbent article of the present invention is developed.

Fig. 8 is a plan view of the absorbent body 4 'of the light incontinence pad 1' as seen from the skin-facing surface side in the thickness direction T in a state of being spread.

Detailed Description

(various definitions)

Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, unless otherwise specified, "an object (for example, a light incontinence pad, an absorber, or the like) placed on a horizontal plane in an expanded state when viewed in the thickness direction of the object from the upper side in the vertical direction (the front sheet side or the back sheet side in the case where the object is a light incontinence pad)" is simply referred to as "top view".

The various directions and the like used in the present specification are as follows unless otherwise specified.

In the present specification, the term "longitudinal direction" refers to a direction along which the length of a vertically long object (for example, a light incontinence pad, an absorber, or the like in an expanded state) in a plan view is long, the term "width direction" refers to a direction along which the length of a vertically long object in a plan view is short, and the term "thickness direction" refers to a direction perpendicular to an object placed on a horizontal plane in an expanded state ", and these directions are in a mutually orthogonal relationship.

In the present specification, the "virtual line located at the center in the width direction of the longitudinal object and extending in the longitudinal direction" is referred to as "width direction center line C _L The virtual line extending in the width direction and located at the center of the longitudinal direction of the longitudinal object is referred to as a longitudinal centerline C _W ". In this connection, "in the longitudinal direction of the elongated object, with respect to the longitudinal center line C _W The relatively near side is referred to as "longitudinal direction inner side", and is referred to as "longitudinal direction center line C with respect to the longitudinal direction center line in the longitudinal direction of the elongated object _W The relatively far side is referred to as the "lengthwise outer side". Similarly, "with respect to the widthwise centerline C in the widthwise direction of the elongated object _L The relatively near side is referred to as "widthwise inner side", and is referred to as "widthwise center line C with respect to the widthwise center line in the widthwise direction of the elongated object" _L The relatively far side is referred to as "the widthwise outer side".

In the present specification, unless otherwise specified, the "proximal side facing the skin surface of the wearer when the light incontinence pad is worn" will be referred to as the "skin-facing surface side", and the "distal side facing the skin surface of the wearer when the light incontinence pad is worn" will be referred to as the "non-skin-facing surface side". In this regard, in the absorbent article, 2 surfaces on the skin-facing surface side and the non-skin-facing surface side facing each other in the thickness direction are referred to as a skin-facing surface and a non-skin-facing surface, respectively, and in the constituent members such as the front sheet, the back sheet, and the absorbent body, 2 surfaces on the skin-facing surface side and the non-skin-facing surface side facing each other in the thickness direction are referred to as a skin-facing surface side surface and a non-skin-facing surface side surface, respectively.

[ light incontinence pad ]

As shown in fig. 1 and 2, the light incontinence pad 1 according to an embodiment of the present invention has a longitudinal shape having a longitudinal direction L and a width direction W in plan view, and 2 longitudinal end edges protruding in an arc shape toward the longitudinal outer side. The external shape of the light incontinence pad 1 is not limited to this, and any shape (for example, oval, hourglass, gourd-shaped, etc.) can be used as long as it is a long shape, and it can be used in accordance with various applications, use modes, etc.

The light incontinence pad 1 described above has, as a basic structure, the following components in the thickness direction T: a liquid-permeable topsheet 2 forming the skin-facing surface of the light incontinence pad 1; a back sheet 3 forming a non-skin-facing surface of the light incontinence pad 1; and an absorbent body 4 located between the sheets.

As shown in fig. 1 to 3, the light incontinence pad 1 further includes: a skin-facing absorbent layer 7 disposed between the front sheet 2 and the absorbent body 4, and comprising a plurality of granular absorbent polymers and a hydrophilic nonwoven fabric covering the absorbent polymers; an adhesive part 8 arranged on the surface of the back sheet 3 on the non-skin-facing surface side, for adhesively fixing the light incontinence pad 1 to the inner surface of a garment worn by the wearer, such as an undergarment; a pair of

side sheets

91, 92 disposed at both ends in the width direction W of the light incontinence pad 1 at a position closer to the skin facing surface side than the front sheet 2 and extending in the longitudinal direction L; and a plurality of

elastic members

93, 94 disposed along the longitudinal direction L in each of the pair of

side sheets

91, 92.

When the light incontinence pad 1 is attached to the inner surface of the garment of the wearer (that is, when the light incontinence pad 1 is bent in the longitudinal direction L), the pair of

side sheets

91 and 92 are contracted in the longitudinal direction L by the

elastic members

93 and 94, and the end edges on the inner sides in the width direction of the pair of

side sheets

91 and 92 are raised to form the pair of leakage preventing

wall portions

9 and 9.

As shown in fig. 1, the light incontinence pad 1 has a first folding line FL extending in the width direction W for folding the light incontinence pad 1 in the longitudinal direction L with the front sheet 2 as the inner side, between one end edge and the other end edge in the longitudinal direction L of the light incontinence pad 1 in a plan view ₁ And a second folding line FL ₂ Therefore, the folding device can be folded compactly, and is excellent in storage property, portability, and the like.

As shown in fig. 1 to 4, the absorbent body 4 of the light incontinence pad 1 of the present embodiment includes, in a plan view: across a widthwise centre line C extending in the longitudinal direction L of the light incontinence pad 1 _L Two pairs of relatively low-rigidity bent guide portions 51 to 54 which are recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface side and are symmetrically arranged; located on the inner side in the width direction of the two pairs of buckling guiding portions 51 to 54 and across a width direction center line C _L A pair of

recesses

61, 62 which are arranged symmetrically and extending in the longitudinal direction L, are recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface side, and have relatively low rigidity. In this specification, relatively low rigidity means that rigidity is relatively lower than that of the other portions.

As shown in fig. 1, the bending guide portions 51 to 54 extend from the widthwise end edges 4W of the absorbent body 4, respectively ₁ 、4W ₂ Extends toward the widthwise inner side and extends toward the lengthwise inner side as it goes toward the widthwise inner side.

In the light incontinence pad 1, a pair of folded

guide portions

51 and 52 located on one side in the longitudinal direction L of the absorbent body 4 and a pair of folded

guide portions

53 and 54 located on the other side in the longitudinal direction L of the absorbent body 4 are arranged so as to sandwich a longitudinal center line C extending in the width direction W _W Symmetrical.

As shown in fig. 5, the light incontinence pad 1 functions as at least one of the bending base points of the absorbent body 4The folded

guide portions

51, 52 extend from the widthwise end edge 4W of the absorbent body 4 ₁ 、4W ₂ Since the absorbent body 4 and thus the light incontinence pad 1 extend inward in the width direction and extend inward in the longitudinal direction as going inward in the width direction, the absorbent body 4 and thus the light incontinence pad 1 are likely to deform (i.e., have a follow-up deformation function) in response to the movement of the wearer during the movement of the wearer and the like (specifically, even when a force in a direction in which the light incontinence pad 1 is alternately twisted left and right about the longitudinal direction L is applied thereto), and the wearer is unlikely to feel uncomfortable.

Further, in the light incontinence pad 1, since the absorbent body 4 has the pair of

concave portions

61 and 62 extending in the longitudinal direction L at the positions on the widthwise inner sides of the bending

guide portions

51 and 52, even if a force in a direction of alternately twisting the light incontinence pad 1 left and right about the longitudinal direction L is applied to the light incontinence pad 1 via the at least one pair of bending

guide portions

51 and 52 during the wearer's operation, the force can be dispersed by the pair of

concave portions

61 and 62 extending in the longitudinal direction L, and the widthwise inner side portions of the pair of

concave portions

61 and 62, that is, the widthwise central portion of the absorbent body 4 can be made less deformable.

In this way, the light incontinence pad 1 can reliably bring the widthwise central portion of the absorbent body 4 into close contact with the crotch of the wearer in addition to the following deformation action of the at least one pair of folding guides 51, 52, and therefore can exhibit excellent fitting properties even when the wearer is in motion.

Therefore, the light incontinence pad 1 is less likely to cause discomfort to the wearer even when the wearer is walking or the like, and can exhibit excellent fit.

In the present specification, the width direction center line C extending in the longitudinal direction L is interposed therebetween _L Symmetrical means with the widthwise centerline C _L Is axisymmetric for the symmetry axis. Further, a longitudinal center line C extending in the width direction W is interposed therebetween _W The symmetry is also the same.

In addition, the light incontinence pad 1 described above further includes, as shown in fig. 1: a pair of compression parts E ₁ 、E ₂ They are arranged across the widthToward the center line C _L And extends in the length direction L in a symmetrical manner; a pair of compression parts E ₃ 、E ₄ They are located at the pair of compression portions E ₁ 、E ₂ And is separated by a longitudinal center line C _W And symmetrically extends in the width direction W in an arc shape; arc sealing part R _s Which extends continuously along the outer peripheral edge portion of the light incontinence pad 1. In the above-described light incontinence pad 1, as shown in fig. 1, a pair of compressed portions E ₁ 、E ₂ Is formed in a position and shape overlapping the pair of

concave portions

61, 62 in a plan view.

As shown in fig. 3, the compression section E ₁ ～E ₄ The front sheet 2, the skin-facing surface side absorbent layer 7, and the absorber 4 are formed so as to be recessed in the thickness direction T from the skin-facing surface side surface of the front sheet 2 toward the back sheet 3, and are compressed in the thickness direction T from the skin-facing surface side toward the non-skin-facing surface side by processing means such as embossing.

In addition, these compression portions E ₁ ～E ₄ The position and shape of (a) are not particularly limited, and any shape can be used according to desired liquid diffusibility, deformation inducibility, strength, and the like. The light incontinence pad 1 itself may also be free of such a compression E ₁ ～E ₄ 。

Hereinafter, various constituent members of the absorbent article of the present invention will be described in more detail with reference to the light incontinence pad 1 and the like of the above embodiment.

[ front sheet ]

In the light incontinence pad 1 described above, as shown in fig. 1, the front sheet 2 has a longitudinal outer shape extending from one end edge to the other end edge in the longitudinal direction L of the light incontinence pad 1 and extending from the vicinity of one end edge to the vicinity of the other end edge in the width direction W of the light incontinence pad 1 in plan view. The front sheet 2 is disposed at a position on the skin-facing surface side in the thickness direction T of the light incontinence pad 1, and is composed of a liquid-permeable sheet member forming a contact surface capable of abutting against the skin of the wearer, that is, the skin-facing surface of the light incontinence pad 1.

As shown in fig. 1, the front sheet 2 has a slightly larger dimension in the longitudinal direction L and the width direction W than the absorbent body 4 disposed on the non-skin-facing surface side of the front sheet 2, and a pair of

side sheets

91 and 92 are joined to the skin-facing surface side surfaces of both end portions in the width direction W.

The liquid-permeable sheet member that can be used as the front sheet 2 is not particularly limited as long as it has the respective characteristics (for example, liquid permeability, skin touch, softness, strength, etc.) of the front sheet that can be used as a light incontinence pad, and any liquid-permeable sheet member such as a nonwoven fabric such as a hot air nonwoven fabric, a spunlaced nonwoven fabric, a spunbond nonwoven fabric, a point-bonded nonwoven fabric, or a porous resin film can be used.

In the case of using a nonwoven fabric as the front sheet, the nonwoven fabric may have a single-layer structure or a multilayer structure having 2 or more layers. The type of the constituent fibers of the nonwoven fabric is not particularly limited, and examples thereof include hydrophilic fibers such as cellulose fibers and thermoplastic resin fibers subjected to hydrophilization treatment. These fibers may be used alone or in combination of two or more kinds.

Examples of cellulose fibers that can be used as constituent fibers of the nonwoven fabric include natural cellulose fibers (e.g., plant fibers such as cotton), regenerated cellulose fibers, purified cellulose fibers, and semisynthetic cellulose fibers.

Examples of thermoplastic resin fibers that can be used as constituent fibers of the nonwoven fabric include fibers made of known thermoplastic resins such as olefin resins such as Polyethylene (PE) and polypropylene (PP), polyester resins such as polyethylene terephthalate (PET), and polyamide resins such as 6-nylon. These resins may be used alone or in combination of two or more.

The structure of the liquid-permeable sheet member used as the front sheet 2 is not particularly limited as long as the effect of the present invention is not impaired, and may have a sheet-like structure that is flat as a whole, or may have a concave-convex structure (e.g., a concave-convex structure having a waveform in cross-sectional shape, a convex-concave structure, or the like) having a plurality of convex portions and concave grooves extending in the longitudinal direction or the width direction. In the case where the liquid-permeable sheet member has such a concave-convex structure, each of the plurality of convex strips in the concave-convex structure may have a solid internal structure or may have a hollow internal structure.

Any chemical agent such as an extract derived from a plant or a skin care agent may be applied to the skin-facing surface side of the front sheet 2, or an intermediate sheet having predetermined liquid diffusibility and liquid permeability may be disposed on the non-skin-facing surface side of the front sheet 2.

In the present invention, the shape, various sizes, basis weights, and the like of the front sheet are not particularly limited as long as they can be used as the front sheet of the absorbent article, and any shape, various sizes, basis weights, and the like can be used according to desired liquid permeability, skin touch, softness, strength, and the like.

[ Back sheet ]

In the light incontinence pad 1 described above, as shown in fig. 2, the back sheet 3 has a longitudinal outer shape extending from one end edge to the other end edge in the longitudinal direction L of the light incontinence pad 1 and extending from one end edge to the other end edge in the width direction W of the light incontinence pad 1 in plan view. As shown in fig. 3, the back sheet 3 is formed of a liquid-impermeable sheet member which is disposed at a position on the non-skin-facing surface side in the thickness direction T of the light incontinence pad 1, forms the non-skin-facing surface of the light incontinence pad 1, and prevents leakage of excreta such as urine passing through the absorber 4 to the outside of the light incontinence pad 1.

Further, an adhesive portion 8 for adhesively fixing the light incontinence pad 1 to the inner surface of a garment worn by the wearer such as an undergarment is arranged on the surface of the back sheet 3 on the non-skin-facing surface side.

The liquid-impermeable sheet member that can be used as the back sheet 3 is not particularly limited as long as it can prevent the permeation of excreted liquid such as urine discharged from the wearer, and for example, a hydrophobic nonwoven fabric formed of hydrophobic thermoplastic resin fibers (for example, various composite fibers such as polyolefin resin fibers, polyester resin fibers, and core-sheath composite fibers) can be used; a porous or nonporous resin film made of a hydrophobic thermoplastic resin such as PE or PP; a laminate formed by bonding a nonwoven fabric to the resin film; a known liquid-impermeable sheet member such as a laminated nonwoven fabric, e.g., SMS nonwoven fabric.

Further, a leakage preventing sheet made of a thermoplastic resin film such as polyethylene may be disposed on the skin facing surface side of the back sheet 3.

In the present invention, the shape, various dimensions, basis weight, and the like of the back sheet are not particularly limited as long as they can be used as a back sheet of an absorbent article, and any shape, various dimensions, basis weight, and the like can be used according to desired leakage preventing performance, breathability, strength, and the like.

[ absorber ]

In the light incontinence pad 1 described above, as shown in fig. 1, the absorbent body 4 has a longitudinal shape in which the central portion in the longitudinal direction L and the width direction W of the light incontinence pad 1 is centered, extends over a wide area in the longitudinal direction L from the vicinity of one end edge to the vicinity of the other end edge of the longitudinal direction L, extends over a wide area from the vicinity of one end edge to the vicinity of the other end edge of the width direction W in the width direction W, and protrudes in an arc shape toward the outer side in the longitudinal direction with respect to 2 longitudinal end edges.

The absorber 4 has a narrowed portion 41 having a relatively smaller width than the other portions in the longitudinal direction at the central portion in the longitudinal direction in plan view, and the narrowed portion 41 includes a minimum width portion 42 having the minimum width of the absorber 4 and

maximum width portions

43, 43 having the maximum width of the absorber 4 on the outer side in the longitudinal direction of the narrowed portion 41.

As shown in fig. 3, the absorbent body 4 is disposed between the front sheet 2 and the back sheet 3 (more specifically, between the skin-facing side absorbent layer 7 and the back sheet 3 on the non-skin-facing side of the front sheet 2) in the thickness direction T of the light incontinence pad 1, and is formed of a predetermined water-absorbent member capable of absorbing and retaining excreta such as urine of a wearer passing through the front sheet 2 and the skin-facing side absorbent layer 7.

The absorbent body 4 is joined to the skin-facing surface side absorbent layer 7 and the non-skin-facing surface side back sheet 3 by any adhesive such as a hot-melt adhesive. The adhesive layer H formed of the adhesive will be described later.

The water-absorbent member that can be used as the absorber 4 is not particularly limited as long as it can absorb and retain excreta liquid such as urine discharged from the wearer, and water-absorbent members made of water-absorbent materials known in the art can be used. Examples of the water-absorbent material constituting such a water-absorbent member include hydrophilic fibers and superabsorbent polymers, and more specifically, cellulose fibers such as crushed pulp, cotton, rayon, acetate fibers, and the like; a particulate material comprising a super absorbent polymer such as a sodium acrylate copolymer; a mixture obtained by arbitrarily combining them, and the like.

The absorbent body 4 may be covered with a wrapping sheet such as a crepe paper having hydrophilicity.

(bending guide portion)

As shown in fig. 1, the absorbent body 4 has a widthwise centerline C extending in the longitudinal direction L of the light incontinence pad 1 in a plan view _L And two pairs of relatively low-rigidity folded guide portions 51 to 54 which are arranged symmetrically and are recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface side. The bending guide portions 51 to 54 extend from the widthwise end edges 4W of the absorbent body 4 ₁ 、4W ₂ Extends toward the widthwise inner side and extends toward the lengthwise inner side as it goes toward the widthwise inner side.

In the present invention, the number of the bending guides is not limited to at least one pair (i.e., two pairs) of the light incontinence pad 1 of the above embodiment, and the bending guides may be formed in only one pair or three or more pairs on the absorbent body.

In this way, at least a pair of bending guide portions functioning as bending base points of the absorber are formed, and if the pair of bending guide portions extend from the widthwise end edges of the absorber toward the widthwise inner side and extend so as to be directed toward the lengthwise inner side with being directed toward the widthwise inner side, the absorber, and thus the absorbent article, is likely to deform following the movement of the wearer even when the wearer moves during walking or the like, and discomfort to the wearer can be made unlikely to occur.

In the present invention, the bending guide portion is not particularly limited as long as it can promote the bending deformation of the absorber, and may be formed of a relatively low-rigidity portion such as a slit portion which is formed by embossing or the like to be penetrated or not penetrated in the thickness direction, a compressed groove portion formed by the absorber, or the like, in addition to a low-basis weight portion which is formed by recessing in the thickness direction due to the low basis weight of the water-absorbent material. Similarly, the surface of the absorbent body on which the bending guide portion is formed (i.e., the surface on the skin-facing surface side and the surface on the non-skin-facing surface side) is not particularly limited as long as the bending deformation as described above can be promoted, and the bending guide portion may be formed so as to be recessed in the thickness direction from the surface on the non-skin-facing surface side of the absorbent body toward the surface on the skin-facing surface side, as in the light incontinence pad 1 described above, so as to be recessed in the thickness direction from the surface on the skin-facing surface side of the absorbent body toward the surface on the non-skin-facing surface side, or so as to be recessed in the thickness direction from the surfaces on both surfaces of the absorbent body toward the surfaces on the opposite sides.

The bending guide portion is not particularly limited as long as it extends from the widthwise end edge of the absorber toward the widthwise inner side and extends so as to be directed toward the lengthwise inner side as it is directed toward the widthwise inner side, and the bending guide portion may extend, for example, in a straight line, a virtual line, and/or a curved line, or may extend while forming one or more branches.

The position of the at least one pair of folding guides is not particularly limited as long as the effect of the present invention is not impaired, but it is preferable that the at least one pair of folding guides are arranged on one side in the longitudinal direction corresponding to the buttocks of the wearer when the wearer wears the absorbent article, and it is more preferable that the at least one pair of folding guides are arranged on one side and the other side in the longitudinal direction L, respectively.

In the light incontinence pad 1 described above, as shown in fig. 1 and 4, the two pairs of folded guide portions 51 to 54 include: a pair of buckling

guide parts

51, 52 which are opposite to a longitudinal center line C extending in the width direction W _W Is positioned at one side of the length direction L; and a pair of folded

guide parts

53, 54 located on the other side in the longitudinal direction L, and the pair of folded

guide parts

51, 52 located on one side in the longitudinal direction L and the pair of folded

guide parts

53, 54 located on the other side in the longitudinal direction L are arranged so as to sandwich the longitudinal direction center line C _W Symmetrical.

In the absorbent article of the present invention, it is not an essential feature that at least one pair of folding guides is arranged in this way, but it is preferable that the absorbent article includes one pair of folding guides on one side in the longitudinal direction and one pair of folding guides on the other side in the longitudinal direction with respect to the longitudinal direction center line extending in the width direction, and the one pair of folding guides on one side in the longitudinal direction and the one pair of folding guides on the other side in the longitudinal direction are arranged so as to be symmetrical across the longitudinal direction center line. If at least one pair of buckling guide portions is so arranged, there are the following advantages: when the wearer moves, the following deformation action by the bending guide portion can be exerted over a wide range in the longitudinal direction of the absorbent article.

In the light incontinence pad 1, as shown in fig. 1 and 4, the pair of folded

guide portions

51 and 52 located on one side in the longitudinal direction L are formed so as to be opposed to the widthwise center line C _L Virtual extension line 51L of bending guide portion 51 located on one side in width direction W and center line C in width direction _L The virtual extension lines 52L of the bending guide portions 52 located on the other side in the width direction W are arranged so as not to overlap on the same straight line.

Similarly, the pair of folding guides 53, 54 located on the other side in the longitudinal direction L are also aligned with the widthwise center line C _L Virtual extension line 53L of bending guide portion 53 located on one side in width direction W and center line C in width direction _L On the other side in the width direction WThe virtual extension lines 54L of the bending guide portions 54 are arranged so as not to overlap on the same straight line.

The virtual extension line of the bending guide portion is a virtual line that overlaps and extends the center line of the bending guide portion in a plan view, and each of the virtual extension lines 51L to 54L is a virtual straight line that overlaps the center line of the linear bending guide portion 51 to 54.

In the absorbent article of the present invention, it is not an essential feature that at least one pair of folding guides is disposed in this way, but it is preferable that at least one pair of folding guides is disposed such that an imaginary extension line of the folding guide on one side in the width direction with respect to the width direction center line and an imaginary extension line of the folding guide on the other side in the width direction with respect to the width direction center line do not overlap on the same straight line. If at least one pair of bending guide portions is disposed in this manner, a bending base point can be formed for each bending guide portion, the absorber can be easily deformed into a wider variety of shapes, and even if the above-described twisting-direction force acts on the widthwise central portion of the absorber via the bending guide portions when the wearer operates, the bending base point can be less likely to be formed in the widthwise central portion, and bending of the widthwise central portion of the absorber is less likely to occur.

In the light incontinence pad 1 described above, as shown in fig. 4, the pair of folded

guide portions

51 and 52 located on one side in the longitudinal direction L communicate with the pair of

concave portions

61 and 62 at the

end portions

51E and 52E on the inner side in the width direction in a plan view, respectively.

Similarly, the pair of

folding guide portions

53, 54 located on the other side in the longitudinal direction L communicate with the pair of

concave portions

61, 62 at the widthwise inner

side end portions

53E, 54E, respectively, in plan view.

In the absorbent article of the present invention, it is not an essential feature to dispose at least one pair of buckling guide portions, but it is preferable that the end portions on the inner side in the width direction of each of the at least one pair of buckling guide portions communicate with the pair of concave portions. When at least one pair of buckling guide portions is disposed in this manner, the force in the twisting direction transmitted through the buckling guide portions is more easily dispersed in the pair of concave portions during the movement of the wearer, and the widthwise central portion of the absorber can be made less deformable.

In fig. 4, boundaries between the

ends

51E and 53E on the widthwise inner sides of the bending

guide portions

51 and 53 and the concave portion 61 extending in the longitudinal direction L and boundaries between the

ends

52E and 54E on the widthwise inner sides of the bending

guide portions

52 and 54 and the concave portion 62 extending in the longitudinal direction L are indicated by virtual lines (broken lines).

In addition, the light incontinence pad 1 has 2 folding lines FL extending in the width direction W in plan view ₁ 、FL ₂ As shown in fig. 1, the two pairs of folding guides 51 to 54 are provided so as not to overlap with 2 folding lines FL ₁ 、FL ₂ Arranged in a crossed manner.

In the present invention, although the absorbent article is not necessarily configured as such, the absorbent article preferably has at least 2 folding lines extending in the width direction, and the pair of folding guide portions are respectively arranged so as not to intersect with these folding lines. With such a configuration of the absorbent article, the absorbent article can be folded compactly, the storage property, portability, and the like can be made excellent, and the bending base point using the folding crease by the folding line can be formed, so that the absorbent article can be easily deformed into a more various shapes without inhibiting the following deformation action by the pair of folding guide portions.

In the present invention, the folding method of the absorbent article, the positions of the folding lines, the number of folding lines, and the like are not particularly limited as long as the effects of the present invention are not hindered. For example, the absorbent article may have 1 folding line extending in the width direction, may have any number of folding lines of 2 or more, or may not have folding lines extending in the width direction.

(concave portion)

As shown in fig. 1, the absorber 4 has a center line C located on the inner side in the width direction of the bending guide portions 51 to 54 in the plan view and extending in the width direction _L Symmetrically arranged to extend in the longitudinal direction L, and to be recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface sideA pair of

recesses

61, 62 of relatively low rigidity. The pair of

concave portions

61 and 62 are arranged such that the distance between the concave portion 61 on one side and the concave portion 62 on the other side in the width direction W is 1/4 or more of the width direction length of the absorber 4, and extend in the longitudinal direction L such that the length in the longitudinal direction is 1/10 or more of the length in the longitudinal direction of the absorber 4.

In the present invention, the number of the concave portions located on the widthwise inner side of the bending guide portion is not particularly limited as long as it is at least one pair, and the concave portions extending in the longitudinal direction may be formed in only one pair or may be formed in two or more pairs on the absorber.

In this way, if the absorber has at least one pair of concave portions extending in the longitudinal direction at positions on the widthwise inner side of the bending guide portion, even if a force in a direction of alternately twisting left and right about the longitudinal direction is applied to the absorbent article via the bending guide portion during the wearer's operation, the force can be dispersed by the at least one pair of concave portions extending in the longitudinal direction, and the portion on the widthwise inner side of the pair of concave portions, that is, the widthwise central portion of the absorber can be made less deformable. In this way, the absorbent article of the present invention can reliably adhere the widthwise central portion of the absorbent body to the crotch of the wearer in addition to the following deformation action of the bending guide portion, and therefore can exhibit excellent fitting properties even when the wearer is acting.

In the present invention, the form of the recess extending in the longitudinal direction is not particularly limited as long as the force transmitted from the bending guide portion can be dispersed in the longitudinal direction, and the recess extending in the longitudinal direction may be formed of a recess having relatively low rigidity such as a compressed groove portion formed by compressing a through or non-through slit portion or an absorber in the thickness direction by embossing or the like, in addition to a low basis weight portion recessed in the thickness direction by lowering the basis weight of the water-absorbent material. Similarly, the surface of the absorbent body in which the recess extending in the longitudinal direction is formed (i.e., the surface on the skin-facing surface side and the surface on the non-skin-facing surface side) is not particularly limited as long as the force transmitted from the bending guide portion as described above can be dispersed in the longitudinal direction, and the recess extending in the longitudinal direction may be formed to be recessed in the thickness direction from the surface on the non-skin-facing surface side of the absorbent body toward the surface on the skin-facing surface side as in the light incontinence pad 1 described above, may be formed to be recessed in the thickness direction from the surface on the skin-facing surface side of the absorbent body toward the surface on the non-skin-facing surface side, or may be formed to be recessed in the thickness direction from the surfaces on the opposite sides of both surfaces of the absorbent body.

The extending manner is not particularly limited as long as at least one pair of recesses extending in the longitudinal direction is located on the inner side in the width direction of the bending guide portion in a plan view and extends in the longitudinal direction so as to be symmetrical across the center line in the width direction, and each of the pair of recesses extending in the longitudinal direction may extend in a straight line, a virtual line, and/or a curved line, for example, or may extend while forming one or a plurality of branches.

The arrangement position of the at least one pair of concave portions extending in the longitudinal direction is not particularly limited as long as the effect of the present invention is not hindered, and is preferably arranged at a position on the outer side in the width direction than the region where the excretory opening of the wearer can come into contact when the wearer wears the absorbent article, and extends longer in the longitudinal direction than the region.

(constriction)

In addition, in the light incontinence pad 1 described above, as shown in fig. 1 and 4, the absorber 4 has a narrowed portion 41 having a relatively small width direction length in a longitudinal direction central portion in plan view, and the light incontinence pad 1 is easily attached to the crotch portion of the wearer. Further, if the absorber 4 has such narrowed portions 41, the absorber 4 having relatively high rigidity among the constituent members of the light incontinence pad 1 is less likely to contact the inner portions of the legs of the wearer, and thus the wearer is less likely to feel a foreign body sensation.

In the light incontinence pad 1, the two pairs of folded guide portions 51 to 54 are disposed in the narrowed portion 41, respectively.

In the absorbent article of the present invention, it is not an essential feature that the bending guide portions are arranged in such narrowed portions, but it is preferable that at least one pair of bending guide portions are arranged in such narrowed portions. If at least one pair of bending guide portions is arranged at the narrowed portion corresponding to the leg circumference of the wearer, the bending guide portions are easily deformed according to the movement of the legs of the wearer, and the following deformation can be more reliably exerted.

In the light incontinence pad 1, as shown in fig. 1, the end portions of the bending guide portions 51 to 54 located on the outer side in the width direction are located between the maximum width portion 43 having the maximum width of the absorbent body 4 on the outer side in the longitudinal direction of the narrowed portion 41 and the minimum width portion 42 having the minimum width of the absorbent body 4 in the narrowed portion 41, and are located on the outer side in the longitudinal direction from the intermediate position in the longitudinal direction between the maximum width portion 43 and the minimum width portion 42.

In the absorbent article of the present invention, it is not an essential feature to arrange the bending guide portions in this way, but if the outer end portions of at least one pair of the bending guide portions in the width direction are located at such a specific portion, the bending guide portions can be reliably deformed in accordance with the movement of the legs of the wearer even when the movement is large, and the above-described effects can be more stably and reliably exhibited.

In the absorbent article of the present invention, the absorbent body has the above-described technical feature that the narrowed portion is not essential, and therefore, for example, the absorbent body may have a structure in which the length in the width direction is constant in the length direction.

In the present invention, the top view shape, various sizes, basis weights, and the like of the absorber are not particularly limited as long as the absorber can be used as an absorber for an absorbent article, and any shape (for example, rectangular, oval, hourglass, etc.), various sizes, basis weights, and the like can be employed according to desired absorption performance, softness, strength, and the like.

The position where the absorbent body is disposed is not particularly limited as long as it includes a central portion in the longitudinal direction of the absorbent article, and the absorbent body may be disposed, for example, so as to be offset to one side in the longitudinal direction of the absorbent article.

In the absorbent article of the present invention, the absorbent body may be joined to the constituent members such as the skin-facing surface side absorbent layer, the front sheet, and the intermediate sheet located on the skin-facing surface side via the adhesive layer. In this way, when the absorber is joined to the constituent member located on the skin-facing surface side via the adhesive layer, the absorber is less likely to be deformed even when the wearer operates, and more excellent fitting properties can be exhibited.

The adhesive layer preferably has a portion intersecting with a virtual line parallel to the longitudinal direction in a plan view, and extends in the longitudinal direction.

Fig. 6 is a plan view schematically showing an arrangement of the adhesive layer H disposed on the skin facing surface side of the absorbent body 4. In fig. 6, the adhesive layer H disposed on the absorber 4 has a spiral shape in a plan view, that is, has a virtual line L parallel to the longitudinal direction L ₁ In the form of the intersecting portions, the cross portions extend in the longitudinal direction L.

In this way, the adhesive layer has a portion intersecting the longitudinal direction L in a plan view, and is less likely to cause absorption inhibition by the adhesive layer when extending in the longitudinal direction (for example, being arranged in a spiral shape, an omega shape, or the like along the longitudinal direction), and is not likely to inhibit the following deformation action of the bending guide portion even when an action such as the force in the torsion direction is applied, so that the absorbent article can be reliably deformed to follow the action of the wearer.

In the present invention, the form of the absorbent body, in particular, the form of at least one pair of folded guide portions and at least one pair of concave portions extending in the longitudinal direction of the absorbent body is not limited to the form of the light incontinence pad 1 described above, as long as the effect of the present invention is not hindered.

Fig. 7 is a plan view of the light incontinence pad 1' according to another embodiment of the absorbent article of the present invention as seen in the thickness direction T from the front sheet 2 side in a state where the light incontinence pad is spread, and fig. 8 is a plan view of the light incontinence pad 1' as seen in the thickness direction T from the skin-facing surface side in a state where the absorbent body 4' is spread.

In the light incontinence pad 1' of this other embodiment, the basic structure is provided with: a liquid-permeable topsheet 2 forming the skin-facing surface of the light incontinence pad 1'; a back sheet (not shown) forming a non-skin-facing surface of the light incontinence pad 1; and an absorber 4 'located between the sheets, and further comprising an adhesive portion (not shown) which is disposed on the non-skin-facing surface side of the back sheet and which adheres and fixes the light incontinence pad 1' to the inner surface of the clothing of the wearer.

In this light incontinence pad 1', as shown in fig. 7, there is: a pair of compression parts E' ₁ 、E’ ₂ They are separated by a widthwise center line C _L A symmetrical manner extending in the length direction L; a pair of compression parts E' ₃ 、E’ ₄ They are respectively positioned at the pair of compression parts E' ₁ 、E’ ₂ Is located on the outer side in the longitudinal direction of (C) and is separated by a longitudinal center line C _W Symmetrical across the widthwise centerline C in the widthwise direction W _L One side extends in a substantially circular arc shape; a pair of compression parts E' ₅ 、E’ ₆ Respectively located at the pair of compression portions E' ₁ 、E’ ₂ Is located on the outer side in the longitudinal direction of (C) and is separated by a longitudinal center line C _W A symmetrical pattern is drawn in comparison with the pair of compression portions E' ₃ 、E’ ₄ Large arc extends; and a circular arc seal portion continuously extending along the outer peripheral edge portion of the light incontinence pad 1.

In addition, in this light incontinence pad 1', as shown in fig. 7 and 8, the absorber 4' also has, in a plan view: with a widthwise centerline C extending in the lengthwise direction L of the light incontinence pad 1' being interposed therebetween _L Two pairs of relatively low-rigidity bent guide portions 51 'to 54' recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface side; and a center line C located on the inner side in the width direction of the two pairs of buckling guiding parts 51 'to 54' and separated from each other in the width direction _L Symmetrically arranged extending in the longitudinal direction L, and recessed in the thickness direction T from the surface on the non-skin-facing surface side toward the surface on the skin-facing surface side, and facing each otherA pair of recesses 61', 62' of low rigidity. The bending guide portions 51' to 54' extend from the widthwise end edges 4W of the absorbent body 4', respectively ₁ 、4W ₂ Extends toward the widthwise inner side, extends toward the lengthwise inner side as it goes toward the widthwise inner side, and extends from the widthwise end edge 4W of the absorber 4 ₁ 、4W ₂ The intermediate portion facing the inner side in the width direction has branching portions 51'b to 54' b which branch to the outer side in the length direction as facing the inner side in the width direction. When the bending guide portions 51 'to 54' have such branch portions 51'b to 54' b, even if excreted liquid such as urine spreads in the longitudinal direction L along the bending guide portions 51 'to 54', the excreted liquid can be guided to the widthwise inner side, and therefore leakage of the excreted liquid can be more unlikely to occur.

In the light incontinence pad 1', as shown in fig. 8, the pair of folded guide portions 51', 52' located on one side in the longitudinal direction L communicate with the end portions 51' e, 52' e on the inner side in the width direction and the end portions on one side in the longitudinal direction L of the pair of concave portions 61', 62', respectively.

Similarly, the pair of folded guide portions 53', 54' located on the other side in the longitudinal direction L communicate with the other side ends in the longitudinal direction of the pair of concave portions 61', 62', respectively, at the widthwise inner side ends 53'e, 54' e, respectively, in plan view.

When a pair of bending guide portions and a pair of concave portions extending in the longitudinal direction are arranged in this manner, the above-described twisting-direction force transmitted through the bending guide portions during the operation of the wearer is more likely to be dispersed in the pair of concave portions, and the widthwise central portion of the absorbent body is less likely to be deformed, as in the case of the light incontinence pad 1 described above.

In fig. 8, boundaries between the ends 51'e, 53' e on the widthwise inner side of the bending guide portions 51', 53' and the concave portion 61 'extending in the longitudinal direction L and boundaries between the ends 52' e, 54'e on the widthwise inner side of the bending guide portions 52', 54 'and the concave portion 62' extending in the longitudinal direction L are also indicated by imaginary lines (broken lines), respectively.

In the light incontinence pad 1', the pair of folded guide portions 51', 52' located on one side in the longitudinal direction L and the pair of folded guide portions 53', 54' located on the other side in the longitudinal direction L are arranged so as to sandwich the longitudinal center line C _W And is configured in a symmetrical manner.

Further, in the light incontinence pad 1', a pair of folded guide portions 51', 52' located on one side in the longitudinal direction L are arranged with respect to the widthwise centerline C _L An imaginary extension line 51'L of the bending guide portion 51' located at one side in the width direction W and a center line C with respect to the width direction _L The virtual extension lines 52'L of the bending guide portions 52' located on the other side in the width direction W do not overlap on the same straight line, and similarly, the pair of bending guide portions 53', 54' located on the other side in the length direction L are also arranged with respect to the width direction center line C _L Virtual extension line 53'l of bending guide portion 53' located on one side in width direction W and center line C in width direction _L The virtual extension lines 54'l of the bending guide portions 54' located on the other side in the width direction W do not overlap on the same straight line.

[ skin-facing side absorbent layer ]

As shown in fig. 3, the light incontinence pad 1 shown in fig. 1 has a skin-facing surface side absorbent layer 7 at a position closer to the skin-facing surface side than the absorbent body 4 (more specifically, between the front sheet 2 and the absorbent body 4).

As shown in fig. 1, the width direction length of the portion of the skin-facing surface side absorbent layer 7 overlapping the bending guide portions 51 to 54 in the thickness direction T is formed to be larger than the width direction length of the portion of the absorbent body 4 having the bending guide portions 51 to 54.

In the absorbent article of the present invention, it is not an essential feature to form the skin-facing surface side absorbent layer in this way, but the skin-facing surface side absorbent layer is preferably formed such that the width-directional length of the portion overlapping the pair of folded guide portions in the thickness direction is greater than the width-directional length of the portion of the absorbent body having the pair of folded guide portions. If the skin-facing surface side absorbent layer is formed in this manner, the twisting due to the deformation of the bending guide portion can be less likely to occur before the excreta such as urine is supplied from the wearer, and therefore, the absorbent article having such a skin-facing surface side absorbent layer can exhibit more excellent fitting properties, and leakage of the excreta due to the twisting can also be less likely to occur.

In the present invention, the skin-facing surface side absorbent layer is not particularly limited as long as it has a function of absorbing and retaining excretory fluid such as urine discharged from the wearer, and for example, a structure composed of the same water-absorbent material as the absorbent material described above, a structure in which the water-absorbent material is wrapped with 1 sheet or 2 sheets or more of a liquid-permeable sheet such as a hydrophilic nonwoven fabric, or the like, can be preferably used.

In the absorbent article of the present invention, the skin-facing surface side absorbent layer preferably contains at least an absorbent polymer. If the skin-facing side absorbent layer contains at least an absorbent polymer, the skin-facing side absorbent layer absorbs the excretory fluid and swells when the excretory fluid such as urine is supplied from the wearer, and twisting of the absorbent body on the non-skin-facing side of the skin-facing side absorbent layer can be less likely to occur. Thus, the absorbent article having such a skin-facing surface side absorbent layer is easy to maintain excellent fit even after excretion by the wearer, and leakage of excreted liquid due to torsion is less likely to occur.

The absorbent polymer is a polymer capable of absorbing and retaining water, and examples thereof include a polymer having a three-dimensional mesh structure formed by appropriately crosslinking a water-soluble polymer. Specifically, starch-based, acrylic-based, amino acid-based particulate or fibrous polymers and the like are exemplified.

In the present invention, the top view shape, various sizes, basis weights, and the like of the skin-facing side absorbent layer are not particularly limited as long as the effects of the present invention are not impaired, and any shape (for example, rectangular, oval, hourglass, etc.), various sizes, basis weights, and the like can be employed according to desired absorption performance, softness, strength, and the like. Since the absorbent article of the present invention is not necessarily provided with such a skin-facing surface side absorbent layer, the absorbent article may not be provided with such a skin-facing surface side absorbent layer.

[ adhesive portion ]

In the light incontinence pad 1 described above, the adhesive portion 8 for adhering and fixing the light incontinence pad 1 to the inner surface of the clothing of the wearer is, as shown in fig. 2, arranged in 6 bands which extend continuously in the longitudinal direction L and are arranged at predetermined intervals in the width direction W on the surface of the back sheet 3 on the non-skin-facing surface side.

Since a release sheet (not shown) for protecting the adhesive portion 8 is generally attached to the surface of such an adhesive portion 8, when the light incontinence pad 1 is adhesively fixed to the inner surface of the clothing worn by the wearer, the adhesive portion 8 is pressed against the inner surface of the clothing worn by peeling the release sheet, and the light incontinence pad 1 can be adhesively fixed to the inner surface of the clothing worn.

In the light incontinence pad 1 described above, as shown in fig. 2, the bending guide portions 51 to 54 are arranged so as to partially overlap the adhesive portion 8 in the thickness direction T.

In the absorbent article of the present invention, the pair of folded guide portions are not necessarily arranged as such, but it is preferable that the pair of folded guide portions are arranged so as not to overlap with the adhesive portion arranged on the non-skin-facing surface side surface of the back sheet or to overlap with the adhesive portion arranged on the non-skin-facing surface side surface of the back sheet locally in the thickness direction, respectively. In this way, if the pair of folded guide portions are disposed so as not to overlap the adhesive portion entirely in the thickness direction, the absorbent article can be fixed to the clothing of the wearer without inhibiting the following deformation action of the pair of folded guide portions, and excellent fitting properties can be more stably exhibited.

In the light incontinence pad 1 described above, as shown in fig. 2, the adhesive portion 8 is disposed so as to extend to a position on the outer side in the longitudinal direction from each of the bending guide portions 51 to 54 in a plan view.

In the absorbent article of the present invention, it is not an essential feature that the adhesive portion is disposed in this way, but it is preferable that the adhesive portion is disposed at a position on the outer side in the longitudinal direction than at least the pair of folded guide portions. If the adhesive portion is disposed in this manner, even if the bending guide portion functions as a bending base point, the portion on the outer side in the longitudinal direction of the bending guide portion can be reliably fixed to the clothing worn by the wearer, and the absorbent article is less likely to be rolled up or peeled off during wearing.

In the light incontinence pad 1 described above, as shown in fig. 2, the adhesive portion 8 is arranged in a region overlapping the absorbent body 4 in the thickness direction T in a plan view, and is located across the widthwise centerline C extending in the longitudinal direction L _L Disposed on both sides thereof. When the adhesive portion 8 is disposed in this manner, the portion overlapping the absorber 4 in the thickness direction can be reliably adhered and fixed along the shape of the inner surface of the clothing of the wearer, and even if the legs and buttocks of the wearer move alternately left and right during wearing, the portion is likely to deform following the movement together with the clothing of the wearer, and therefore, the moderate-slight incontinence pad 1 is unlikely to roll up or peel off during wearing.

As the adhesive that can be used for such an adhesive portion, any adhesive known in the art can be used, and for example, a pressure-sensitive adhesive mainly composed of a styrene-based copolymer such as styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), or the like can be used.

In the absorbent article of the present invention, the amount and shape of the adhesive portion to be disposed are not particularly limited as long as the effect of the present invention is not impaired, and the adhesive portion may be disposed in any of a plurality of linear shapes (stripe shapes), virtual lines, curved shapes, zigzag shapes, or the like, for example, in 1 or 2 or more lines in the longitudinal direction L, on the surface of the back sheet on the non-skin-facing surface side. The adhesive portion may extend continuously in the longitudinal direction L as described above, or may extend intermittently.

The adhesive portion is not particularly limited as long as the effect of the present invention is not impaired by various dimensions (for example, length in the longitudinal direction, length in the width direction, etc.), basis weight, etc., and any dimensions, basis weight, etc. can be employed in consideration of ease of fixing the light incontinence pad to the clothing to be worn, fit, etc. Since such bonding is not necessarily required in the absorbent article of the present invention, the absorbent article may not be provided with such a bonded portion.

[ leakage wall portion ]

As shown in fig. 1, the light incontinence pad 1 includes a pair of leakage preventing

wall portions

9, 9 including: a pair of

side sheets

91, 92 disposed at both ends in the width direction W of the light incontinence pad 1 at positions closer to the skin facing surface side than the front sheet 2 and extending in the longitudinal direction L; and a plurality of

elastic members

93, 94 arranged in each of the pair of

side sheets

91, 92 in a manner along the length direction L.

(side sheet)

In the light incontinence pad 1 described above, as shown in fig. 1, the pair of

side sheets

91 and 92 are disposed at both end portions in the width direction W of the light incontinence pad 1 at positions on the skin facing surface side of the front sheet 2, and are constituted by a pair of belt-shaped liquid impermeable sheets capable of forming a pair of leakage preventing walls extending in the longitudinal direction L by rising up at the end edge portions on the inner side in the width direction when the light incontinence pad 1 is worn (i.e., when the light incontinence pad 1 is bent in the longitudinal direction L).

The pair of

side sheets

91 and 92 extend from one end edge to the other end edge in the longitudinal direction L of the light incontinence pad 1 in plan view.

The pair of

side sheets

91 and 92 are folded from the surface on the skin facing surface side of the front sheet 2 to the surface on the non-skin facing surface side of the back sheet 3 at both ends in the width direction W of the laminate of the front sheet 2, the skin facing surface side absorbent layer 7, the absorber 4, and the back sheet 3, respectively, and are disposed so as to sandwich the two sheets in the thickness direction T, and in this state, both ends in the width direction W of the laminate are joined by any joining means (not shown) such as heat welding, thereby forming fixed ends of the pair of

side sheets

91 and 92, respectively. On the other hand, the inner side end portions of the pair of

side sheets

91, 92 located on the skin facing surface side of the front sheet 2 in the width direction W are not joined to any sheet-like member, and form free ends.

In the present invention, the belt-shaped liquid-impermeable sheet that can be used as a side sheet is not particularly limited as long as it has the respective characteristics (for example, liquid-impermeable property, skin touch, softness, strength, etc.) of the side sheet that can be used as an absorbent article, and for example, a hydrophobic nonwoven fabric (for example, a spunbond nonwoven fabric, a point-bonded nonwoven fabric, an SMS nonwoven fabric, etc. having hydrophobicity or being given hydrophobicity), a synthetic resin film having liquid-impermeable property, a laminate thereof, etc. can be used.

In the present invention, the shape, basis weight, thickness, etc. of the belt-like liquid impermeable sheet that can be used as a side sheet are not particularly limited as long as the effects of the present invention are not impaired, and any shape, basis weight, thickness, etc. corresponding to the desired liquid impermeable property, skin touch, softness, etc. can be employed.

(elastic Member)

In the light incontinence pad 1 described above, as shown in fig. 1, 2 (total of 4)

elastic members

93, 94 for promoting the rising of the inner side edges in the width direction W by contracting the pair of

side sheets

91, 92 in the longitudinal direction L are arranged on each of the pair of

side sheets

91, 92 in the longitudinal direction L.

The

elastic members

93, 94 are not particularly limited as long as they can apply a contraction force in the longitudinal direction L to the pair of

side sheets

91, 92 and further apply a contraction force in the longitudinal direction L to the light incontinence pad 1 via the pair of

side sheets

91, 92, and for example, rubber threads or flat rubber composed of natural rubber can be used; an arbitrary elastic member such as a linear or belt-shaped member formed from a thermoplastic elastomer such as polyurethane or ethylene-vinyl acetate copolymer (EVA).

The size, shape and number of the

elastic members

side sheets

91, 92, and for example, as the length in the longitudinal direction of the

elastic members

93, 94, it is possible to use a length in the longitudinal direction of 1/2 or more, preferably 2/3 or more, of the entire length in the longitudinal direction (the entire length) of the light incontinence pad 1, and as the fineness of the

elastic members

93, 94, it is possible to use a fineness of 200dtex to 800dtex, preferably 300dtex to 700dtex, and as the number of the

elastic members

93, 94, it is possible to arrange 1 or 2 or 3 or more on the pair of

side sheets

91, 92, respectively.

In the light incontinence pad 1 described above, as shown in fig. 1, the longitudinal fixed ends 93E and 94E of the

elastic members

93 and 94 are located on the outer sides in the longitudinal direction from the virtual extension lines 51L to 54L of the bending guide portions 51 to 54.

In the absorbent article of the present invention, the elastic member is not necessarily disposed in this way, but the fixed end in the longitudinal direction of the elastic member is preferably located at a position on the outer side in the longitudinal direction than the virtual extension line of the pair of folding guides. By disposing the elastic member in this manner, the leakage preventing wall portion can be formed to the outer side in the longitudinal direction of the folded guide portion, and therefore, the folded guide portion functions as a folded base point when the absorbent article is worn, and leakage of the excreted liquid can be prevented even if the absorbent article deforms following the movement of the wearer.

In addition, since the absorbent article of the present invention is provided with the above-described leakage preventing wall portions (i.e., the side panels and the elastic members) and is not necessarily required, the absorbent article may not be provided with these side panels and elastic members.

The present invention can be applied to various absorbent articles such as sanitary napkins, and disposable diapers, in addition to the light incontinence pads of the above embodiments. The absorbent article of the present invention is not limited to the above-described embodiments, and may be appropriately combined, substituted, modified, or the like without departing from the object or gist of the present invention. In the present specification, ordinal numbers such as "first" and "second" are used to distinguish items with the ordinal numbers, and do not mean the order, priority, importance, and the like of the items.

Description of the reference numerals

1 Mild incontinence pad

2 front side sheet

3 back sheet

4 absorber

51-54 bending guide part

61. 62 extending in the longitudinal direction L

7 skin facing side absorbent layer

8 adhesive part

91. 92 side piece

93. 94 elastic member

Claims

1. An absorbent article comprising a front sheet forming a skin-facing surface, a back sheet forming a non-skin-facing surface, and an absorber located between the sheets, the absorbent article having a longitudinal direction, a width direction, and a thickness direction,

the absorber has, in a plan view:

the pair of buckling guide parts extend from the widthwise end edges of the absorber toward the widthwise inner side and extend toward the lengthwise inner side as going toward the widthwise inner side,

the absorbent article further includes an adhesive portion disposed on the non-skin-facing surface side of the back sheet,

The pair of folding guide portions are arranged so as not to overlap the adhesive portion or to partially overlap the adhesive portion in the thickness direction,

2. The absorbent article of claim 1, wherein the absorbent article comprises,

3. The absorbent article as claimed in claim 1 or 2, characterized in that,

4. The absorbent article as claimed in claim 1 or 2, characterized in that,

5. The absorbent article of claim 1, wherein the absorbent article comprises,

the skin-facing side absorbent layer comprises at least an absorbent polymer.

6. The absorbent article as claimed in claim 1 or 2, characterized in that,

7. The absorbent article as claimed in claim 1 or 2, characterized in that,

8. The absorbent article as claimed in claim 1 or 2, characterized in that,

9. The absorbent article as claimed in claim 1 or 2, characterized in that,

10. The absorbent article as claimed in claim 1 or 2, characterized in that,

11. The absorbent article as set forth in claim 10 wherein,