KR102341224B1 - absorbent article - Google Patents

Abstract

The absorbent article 1 includes an absorbent core 31 disposed in a crotch region S1 and a rear region S3, a skin face sheet 10 disposed on the skin-facing side of the absorbent core 31, and an absorbent core. (31) and a central pressing groove (81) formed in the skin surface sheet (10). In the center of the width direction W of the rear region S3, a plurality of high rigidity regions R1 in which a central compression groove 81 is disposed along the longitudinal direction L, and a high rigidity region in the longitudinal direction L A low rigidity region R2 which is disposed between the rigid regions R1 and whose rigidity is lower than that of the high rigidity region R1 is formed.

Description

absorbent article

The present invention relates to absorbent articles such as sanitary napkins.

Patent Document 1 discloses an absorbent article having a concave groove. The concave grooves of Patent Document 1 are formed in the absorber, and are intermittently arranged in the longitudinal direction in the rear region. In the absorbent article of Patent Document 1, the absorbent body is bent in the region between the concave grooves, whereby the rear region is arranged along the buttocks.

Patent Document 1: Japanese Patent Laid-Open No. 2006-263205

Since the recessed groove|channel of patent document 1 is formed only in the absorber and is not formed integrally with a top sheet, sufficient rigidity may not be acquired. Therefore, when the absorbent article is repeatedly deformed starting from the concave groove, the shape of the concave groove is deformed, and the absorbent body may not be able to maintain the intended deformed state. Therefore, twisting or unintentional bending of the absorber may occur, and the fitting property to the body may be deteriorated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article capable of suppressing torsion or unintentional bending and improving the fitability to the body.

The absorbent article according to the present invention includes a longitudinal direction (longitudinal direction (L)) and a width direction (width direction (W)) orthogonal to each other, and a crotch region (crotch region (S1)) positioned in the crotch of the wearer, a posterior region (rear region S3) located rearward from the crotch region, an absorbent core (absorbent core 31) arranged in the crotch region and the posterior region, and skin arranged on the skin-facing surface side rather than the absorbent core An absorbent article having a cotton sheet (skin surface sheet 10), the absorbent core and a central pressing groove (central pressing groove 81) formed in the skin surface sheet, wherein at the center of the width direction of the rear region, It is disposed between a plurality of high rigidity regions (high rigidity region R1 ) in which the central compression groove is disposed along the longitudinal direction, and the high rigidity region in the longitudinal direction, and has a lower rigidity than the high rigidity region. It is a summary that the low-rigidity area|region (low-rigidity area|region R2) is formed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view of the absorbent article in one Embodiment.
FIG. 2 is a rear view of the absorbent article shown in FIG. 1 ;
FIG. 3 is an enlarged view of a portion X shown in FIG. 1 .
It is a figure which shows typically the wearing state of the absorbent article in the cross section taken along line AA shown in FIG.
It is a figure which shows typically the wearing state of the absorbent article in the cross section taken along the BB line shown in FIG. Fig. 5 (a) shows a state in which a wearer wearing an absorbent article is standing, and Fig. 5 (b) shows a state in which the wearer's body, lying facing up, is deformed by being pressed by the bedding.
It is a perspective view of the absorbent article in the state worn by the wearer of a standing state.

At least the following matters become clear by description of this specification and an accompanying drawing.

lengthwise and widthwise directions orthogonal to each other;

a crotch region located in the crotch of the wearer, and

a rear region located behind the crotch region;

an absorbent core disposed in said crotch region and said back region;

a skin-facing sheet disposed on a skin-facing surface side rather than the absorbent core;

An absorbent article having a central pressing groove formed in the absorbent core and the skin surface sheet,

In the center of the width direction of the rear region, a plurality of high rigidity regions in which the central compression grooves are disposed along the longitudinal direction are disposed between the high rigidity regions in the longitudinal direction, and more than the high rigidity region An absorbent article characterized in that a low rigidity region with low rigidity is formed.

In the center of the absorbent core in the width direction, a high rigidity region in which a central compression groove is disposed along the longitudinal direction is formed. The center of the absorbent core in the width direction, when a force is applied from the outside in the width direction to the inside in the width direction at the time of wearing, the high rigidity region in the cross section along the width direction becomes the deformation origin and deforms convexly toward the wearer Thus, the gap between the left and right buttocks is fitted. A low rigidity region is formed between the high rigidity regions in the longitudinal direction. The center of the absorbent core in the width direction is disposed along the rounding of the body in the front-rear direction as the low-rigidity region serves as the deformation origin in the cross-section along the longitudinal direction.

The central compression groove of the high rigidity region is formed in the skin-surface sheet and the absorbent core, and has high rigidity compared to a configuration formed only in the absorbent core. Accordingly, even when the absorbent article is repeatedly deformed when worn, the high rigidity region continues to function as a deformation origin, suppressing twisting or unintentional bending of the absorbent core, and improving the fitability to the body.

As such an absorbent article,

and a joint for fixing the absorbent article to the undergarment;

The low-rigidity region is preferably located in front of the rear edge of the joint portion.

The cross section along the longitudinal direction WHEREIN: The curvature of the rounding of a hip is changing. The part where the curvature of the rounding of the buttocks changes greatly is a part which is easy to deform|transform at the time of wearing. In order to make the absorbent article conform more to the outline of the buttocks, it is preferable to dispose the low-rigidity region at a location where the curvature of the body changes greatly. On the other hand, in order to maintain the fixed state to underwear by a joint part, it is preferable to arrange|position a joint part behind the location where the curvature of the rounding of a hip changes large. Since the low-rigidity region is located on the front side of the rear end edge of the joint, the low-rigidity region is arranged corresponding to the location where the curvature of the buttocks changes greatly, and the joint is formed in response to the rear of the location where the curvature of the rounding of the buttocks changes greatly. can be placed The low stiffness region serves as a strain origin and can deform the absorbent article along the rounding of the buttocks. In addition, since the joint is located on the rear side of the location where the rounding curvature of the buttocks changes greatly, the joint is less likely to deform when worn, and it is easy to maintain the joint state to the undergarment.

As such an absorbent article,

wherein the absorbent core has a low unit weight region having a lower unit weight of absorbent material than the surrounding absorbent core;

The low unit weight region is disposed in the low rigidity region and has an inclined portion extending outwardly in the width direction from the low rigidity region;

It is preferable that the outer edge of the inclined portion extends from the outer side in the width direction toward the inner side in the width direction as going to the rear side.

According to such an absorbent article, since the low rigidity area|region is arrange|positioned in the low unit weight area|region, the low rigidity area|region is easy to deform|transform, and it is easy to function as a deformation|transformation origin of an absorbent article. In addition, when the crotch region is fitted by the wearer's legs at the time of wearing, a force is applied to the rear region from the outside in the width direction to the inside in the width direction and from the crotch region to the rear region. Since the outer edge of the inclined portion extends inward in the width direction as it goes rearward, the inclined portion deforms according to the force from the crotch region side. Therefore, the inclination part absorbs the deformation|transformation by the force from the wearer's leg, suppresses generation|occurrence|production of unintentional wrinkles and distortion, and can improve the fitting property with respect to a body more.

As such an absorbent article,

It is preferable that a width compression groove formed in at least the absorbent core and extending in the width direction is formed in the inclined portion of the low unit weight region.

According to such an absorbent article, the width compression groove|channel becomes a deformation|transformation origin extending in the width direction in the inclination part. Accordingly, the absorbent article is liable to deform not only in the center of the width direction of the rear region but also in the entire width direction of the rear region so as to follow the rounding of the body in the front-rear direction. The absorbent article is more arranged along the buttocks, and the fit property to the body can be further improved.

As such an absorbent article,

The width compression groove preferably extends from the outside in the width direction to the inside in the width direction as it goes toward the rear side.

By being pinched|interposed by both legs of a wearer, the force of the direction which goes to the inside of the width direction from the outer side in the width direction toward the rear from the front side is applied to a rear area|region. The width compression groove extends from the outer side in the width direction to the inner side in the width direction as it goes to the rear side, and it is easy to propagate the force along the force from both legs of the wearer. The width crimping groove transmits the force from the wearer's legs to the center side in the width direction, so that the high rigidity region tends to protrude toward the wearer side. The absorbent article is more arranged along the buttocks, and the fit property to the body can be further improved.

As such an absorbent article,

It is preferable that a pair of longitudinal compression grooves formed in at least the absorbent core and extending in the longitudinal direction are formed on both sides of the high rigidity region of the rear region.

According to such an absorbent article, when a force in a direction from the outside in the width direction to the inside in the width direction is applied to the rear region, a pair of longitudinal compression grooves serves as a deformation origin, and the region between the pair of longitudinal compression grooves is It becomes easy to protrude toward a wearer side. The high rigidity region tends to protrude toward the wearer side, and the absorbent article is further disposed along the buttocks, so that the fitability to the body can be further improved.

As such an absorbent article,

The longitudinal compression grooves are formed at intervals in the longitudinal direction,

The region between the length compression grooves is preferably formed at a position constituting a starting point of deformation together with the low rigidity region when worn.

According to such an absorbent article, since the longitudinal compression grooves are arranged at intervals, in the cross section along the longitudinal direction, the region between the longitudinal compression grooves becomes the deformation origin, and the absorbent article is arranged along the rounding in the front-back direction of the body. easy to become In addition, since the region between the longitudinal compression grooves constitutes the starting point of deformation together with the low-rigidity region during wearing, the entire width direction including the center of the width direction of the rear region is easily arranged along the front-back direction rounding of the body , the fitting properties to the body can be further improved.

As such an absorbent article,

The rigidity of the central compression groove is preferably lower than that of the longitudinal compression groove.

According to such an absorbent article, when a force in a direction from the outer side in the width direction to the inner side in the width direction is applied to the rear region, the central crimping groove is more easily deformed than the longitudinal crimping groove and is more likely to rise toward the wearer. In addition, since the rigidity of the central compression groove is low, even when the central compression groove is in close contact with the buttocks during wearing, discomfort during wearing can be suppressed and the feel can be improved. In addition, since the rigidity of the longitudinal crimping groove is higher than that of the central crimping groove, the force in the direction from the outside in the width direction to the inside in the width direction is transmitted to the area between the longitudinal crimping grooves in the width direction by the longitudinal crimping groove. easy, and the central crimping groove is more likely to protrude toward the wearer. The high rigidity region tends to protrude toward the wearer side, and the absorbent article is further disposed along the buttocks, so that the fitability to the body can be further improved.

As such an absorbent article,

It is preferable that the said low-rigidity area|region has a 1st low-rigidity area|region and a 2nd low-rigidity area|region located behind the said 1st low-rigidity area|region.

By having the first low rigidity region and the second low rigidity region, at least two deformation origins are formed in the cross section along the longitudinal direction, more arranged along the rounding of the buttocks, and the high rigidity region is easy to protrude toward the wearer I lose it, and the fitting characteristics to a body can be raised more. The first low-rigidity region can be arranged so that the bulge of the wearer's buttocks abuts against the front end (end on the crotch side) in the squashed portion in the state where the wearer is lying face up. In addition, the second low-rigidity region may be disposed so that, when the wearer is standing, the wearer's buttocks protrude outward and contact a portion in which the curvature changes greatly. By forming the first low-rigidity region and the second low-rigidity region in this way, the deformation origin of the absorbent article is formed in a portion where the curvature of the body changes greatly, whether the wearer is lying on the stomach or when the wearer is standing. , while suppressing torsion or unintentional bending of the absorbent core, it is possible to further enhance the fit property to the body.

As such an absorbent article,

It has a pair of three-dimensional gathers which can stand on the wearer's side in both outer sides in the width direction of the said absorbent article,

Each three-dimensional gather has an elastic member that expands and contracts in the longitudinal direction, and has a standing portion capable of rising from the top sheet,

It is preferable that at least a part of the low-rigidity region is disposed behind the rear end edge of the standing portion.

At least a part of the low-rigidity region can be arranged so as to become a deformation origin in the cross section along the front-rear direction and to come into contact with a location where the curvature of the buttocks changes greatly. The absorbent article is deformed from the low-rigidity region as a starting point at a position in contact with a location where the curvature of the buttocks changes greatly, and is bent so as to approach the region on the front side and the region on the back side of the low-rigidity region. Further, when the wearer is standing, the standing portion of the three-dimensional gather rises so as to connect the front end edge of the standing portion and the rear end edge of the standing portion in a cross section along the front-rear direction. Since at least a part of the low-rigidity region is formed behind the rising region of the standing portion, in the rising region of the standing portion of the three-dimensional gather, a deformation origin corresponding to a portion in which the curvature of the buttocks changes significantly, is not formed. can maintain a standing state of

As such an absorbent article,

The low rigidity region has a first low rigidity region and a second low rigidity region located behind the first low rigidity region;

The first low-rigidity region is disposed in front of the rear edge of the standing part,

It is preferable that the second low-rigidity region is disposed behind the rear end edge of the standing portion.

According to such an absorbent article, the deformation origin by a 1st low-rigidity area|region and a deformation origin by a 2nd low-rigidity area|region can be formed, and an absorbent article is easy to arrange|position along the rounding of the front-back direction of a body. The first low-rigidity region can be arranged so that the bulge of the wearer's buttocks abuts against the front end of the squashed portion in a state in which the wearer is lying face up. In addition, the second low-rigidity region may be disposed so that, when the wearer is standing, the wearer's buttocks protrude outward and contact a portion in which the curvature changes greatly.

Since the second low-rigidity region is formed behind the rising region of the standing portion when the wearer is standing, the deformation origin by the second low-rigidity region is within the rising region of the standing portion of the three-dimensional gather when the wearer is standing. Without being formed, the standing state of the three-dimensional gather can be maintained. Also, when the wearer is lying down, the absorbent article is sandwiched between the wearer and the bedding. Specifically, the bulge of the buttocks is crushed by the wearer in the state lying face up. The absorbent article is sandwiched between the wearer and the bedding with the bulge of the buttocks rearward than the front end of the bulge, and the bulge of the buttocks is more anterior than the bulge (the bulge of the buttocks is greater than the front end of the squat) in the front side), it is not sandwiched between the wearer and the bedding and is disposed along the body. Therefore, the standing part of a three-dimensional gather rises so that the front end edge of a standing part and the position where the bulge of a buttocks contact|abuts the crushed part in the cross section along the front-back direction may be connected. Accordingly, the deformation origin due to the first low rigidity region is not formed in the rising region of the standing portion in the lying state, and the standing state of the three-dimensional gather can be maintained.

===About the absorbent article according to this embodiment===

Hereinafter, with reference to drawings, the absorbent article which concerns on embodiment is demonstrated. The absorbent article may be any absorbent article, such as a panty liner (a lozenge sheet), a sanitary napkin, an incontinence pad, or a disposable diaper. In the following embodiment, a disposable sanitary napkin is demonstrated as an example of an absorbent article.

In addition, in description of the following drawings, the same or similar code|symbol is attached|subjected to the same or similar part. However, it should be noted that the drawings are schematic, and the ratio of each dimension may be different from the actual one. Therefore, specific dimensions etc. should be judged in consideration of the following description. In addition, even between drawings, parts having different dimensional relationships or ratios may be included.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view of the absorbent article in one Embodiment. 2 is a rear view of the absorbent article; FIG. 3 is an enlarged view of a portion X shown in FIG. 1 . In addition, in FIG. 3, three-dimensional gathering is abbreviate|omitted. The absorbent article 1 has a longitudinal direction (L) and a width direction (W) that are orthogonal to each other, and a thickness direction (T) extending from the wearer's skin-facing surface side (T1) to the non-skin-facing surface side (T2) have The skin-facing surface side T1 corresponds to the side facing the wearer's skin at the time of use. The non-skin-facing-surface side T2 corresponds to the side opposite to the skin-facing-surface side T1 in use, ie, the side facing opposite to the wearer's skin.

The absorbent article 1 has a crotch region S1, a front region S2, and a rear region S3. The crotch region S1 is a region facing the wearer's excretory orifices, for example, the vaginal opening. When the absorbent article 1 is mounted on the undergarment, the crotch region S1 is a region disposed in the crotch portion of the undergarment and disposed between the legs of the wearer. The front region S2 is located in front of the crotch region S1. The shear edge of the front region S2 defines the shear edge of the absorbent article 1 . The rear region S3 is located behind the crotch region S1. The trailing edge of the rear region S3 defines the trailing edge of the absorbent article 1 .

The absorbent article (1) has wings (3) and hip flaps (4). The wing 3 and the hip flap 4 extend outward in the width direction W rather than the outer edge of the absorber 30 in crotch area|region S1. The wing 3 is formed in the crotch region S1. The front edge of the wing 3 is defined by the part to which the wing 3 is attached, and corresponds to the part located in the front side among the two parts which dented inward most in the width direction W. As shown in FIG. The front edge of the wing 3 defines the boundary between the crotch area S1 and the front area S2. The rear end edge of the wing 3 is prescribed|regulated by the part to which the wing 3 is stuck, and corresponds to the part located in the rear side among two parts which dented inward most in the width direction W. As shown in FIG. The trailing edge of the wing 3 defines a boundary between the crotch region S1 and the rear region S3. The center of the longitudinal direction L of the crotch region S1 coincides with the center of the longitudinal direction of the wing. The hip flap 4 is formed in the rear region S3.

The absorbent article 1 has a skin-facing sheet 10 , a non-skin-facing sheet 20 , and an absorbent body 30 . The skin surface sheet 10 is provided on the skin-facing surface side T1 rather than the absorber 30 . The skin surface sheet 10 has a top sheet 11 and a side sheet 12 . The top sheet 11 is a liquid-permeable sheet through which liquids, such as body fluids, permeate. The side sheet 12 covers the outer edge of the top sheet 11 in the width direction W, and extends outward in the width direction W from the top sheet 11 . The non-skin surface sheet 20 is a liquid-impermeable sheet. The non-skin-surface sheet 20 is provided on the non-skin-facing side T2 rather than the absorber 30 .

The non-skin surface sheet 20 is provided with a joint portion 60 for fixing the absorbent article to the undergarment. The junction part 60 is arrange|positioned in the 1st body junction part 61 arrange|positioned in the area|region which overlaps with the absorber 30 in the crotch area|region S1, and the area|region which overlaps with the absorber 30 in the back side area|region S3. It has a 2nd main body joint part 62 which was used, the wing joint part 63 arrange|positioned at the wing 3, and the flap joint part 64 arrange|positioned at the hip flap 4 .

On both outer sides of the absorbent article 1 in the width direction W, a pair of three-dimensional gathers 70 capable of standing up to the wearer are formed. Each three-dimensional gather 70 has an elastic member 71 that expands and contracts in the longitudinal direction L. The elastic member 71 is disposed on the inner edge of the side sheet 12 . Each three-dimensional gather 70 has a standing portion 72 capable of rising from the top sheet 11 as the skin-surface sheet 10 , and a base end portion 73 fixed to the top sheet 11 and not capable of standing up. The base end portion 73 is disposed on the front side and the rear side of the standing portion 72 . The proximal end 73 is a portion shown with a slanted line in FIG. 1 .

The absorbent body 30 is provided between the skin-surface sheet 10 and the non-skin-surface sheet 20 . The absorber 30 is arrange|positioned at least in the crotch area|region S1 and the rear side area|region S3. The absorbent body 30 includes an absorbent core 31 made of an absorbent material that absorbs liquid, and a cover sheet (not shown) surrounding the absorbent core 31 . The absorber 30 has a low unit weight region 41 and a high unit weight region 42 . Here, the "low unit weight region" means a region comprising the absorbent core 31 having a unit weight lower than that of the absorbent core 31 around it, or a region not having the absorbent core 31 . The high unit weight region 42 is a region other than the low unit weight region 41 .

The low unit weight region 41 includes a first low unit weight region 411 that spans the boundary between the crotch region S1 and the rear region S3, and along the longitudinal direction L in the rear region S3. It has the arranged second low unit weight region 412 , and the third low unit weight region 413 extending in the width direction W in the rear region S3 . The absorbent article of this embodiment should just have the 2nd low unit weight area|region 412 at least. The second low unit weight region 412 extends in the longitudinal direction L in the center in the width direction W of the rear region S3 . The leading edge of the second low unit weight region 412 is continuous with the trailing edge of the first low unit weight region 411 , and the trailing edge of the second low unit weight region 412 is an absorbent core 31 . It is located anterior to the trailing edge of

The third low unit weight region 413 is continuous with the second low unit weight region 412 , and extends outwardly from the second low unit weight region 412 in the width direction (W). A plurality of third low unit weight regions 413 are formed at intervals in the longitudinal direction L. The inner edge of the third low unit weight region 413 is continuous with the second low unit weight region 412 , and the outer edge of the third low unit weight region 413 is the outer edge of the absorbent core 31 . It is located more inside the width direction. The third low unit weight region 413 has an inclined portion 44 . The inclined portion 44 extends in the width direction W from the low-rigidity region R2, which will be described later. The outer edge 44E of the inclined portion 44 extends from the outer side in the width direction toward the inner side in the width direction as it goes to the rear side. The planar shape of the inclined portion 44 is, for example, a trapezoid, a semicircle, or a triangular shape having a short length in the width direction toward the rear side. In Fig. 1, an oblique line is attached to the inclined portion 44, and is shown.

In addition, the measurement of the "unit weight of an absorber" in this specification shall be performed with the following measuring method. When the absorbent article 1 is enclosed in a package or the like, a sample taken out from the package and left to stand for 12 hours in an atmosphere of 20°C±2°C and a relative humidity of 60%±5% RH in that state is used.

In the absorbent article packaged with the package, the package is opened, the folded absorbent article is unfolded, and then a portion for measuring a unit weight is cut out from the absorbent article, and the weight of the cut out portion is measured. Then, parts other than the absorber, such as the skin-surface sheet and the non-skin-surface sheet, are removed from the cut out portion, and the weight of the absorber is measured. A unit weight is computed based on the weight of an absorber and the area of the part measuring a unit weight.

The absorbent article 1 is provided with a pressing groove. The compression groove has a central compression groove 81 , a width compression groove 82 , and a length compression groove 83 . The crimping groove may have at least a central crimping groove (81). The central compression groove 81 is formed by compressing at least the top sheet 11 which is the skin surface sheet 10 and the absorbent core 31 in the thickness direction T. The width compression grooves 82 and the length compression grooves 83 are formed by compressing at least the absorbent core 31 in the thickness direction (T). The central crimping groove 81, the width crimping groove 82, and the length crimping groove 83 of the present embodiment are in the rear region S3 in the top sheet 11, the cover sheet, and the absorbent core 31. is formed The central crimping groove 81, the width crimping groove 82, and the length crimping groove 83 are constituted by an aggregate of a plurality of point-shaped crimping portions.

The central compression groove 81 is extended in the longitudinal direction (L), and constitutes a deformation origin extending in the longitudinal direction (L) when worn. The rigidity of the central compression groove 81 is lower than that of the longitudinal compression groove 83 . Specific configurations of the central compression groove and the longitudinal compression groove include a configuration in which the length in the width direction of the central compression groove is shorter than the length in the width direction of the longitudinal compression groove, and the unit weight of the region having the central compression groove is that of the region having the longitudinal compression groove. A configuration lower than the unit weight can be exemplified. The width compression groove 82 extends in the width direction W in both outer sides of the width direction W than the central compression groove 81, and has a deformation origin extending in the width direction W when worn. make up The width compression groove 82 extends from the outside in the width direction W to the inside in the width direction W as going from the front side to the rear side. The central compression groove 81 and the width compression groove 82 are formed in the low unit weight region 41 . At least a portion of the width compression groove 82 is formed in the inclined portion 44 of the low unit weight region 41 .

The longitudinal crimping groove 83 is extended in the longitudinal direction (L) on both outer sides of the width direction (W) than the central crimping groove (81) and the width crimping groove (82), and when worn in the longitudinal direction (L) ) to constitute a deformation origin extending to The length compression groove 83 is formed over the low unit weight region 41 and the high unit weight region 42 . The longitudinal crimping grooves 83 are formed at intervals in the longitudinal direction. The region 83G between the length compression grooves 83 is formed at a position constituting a starting point of deformation together with a low rigidity region R2 to be described later when worn. As a position constituting the starting point of deformation together with the low rigidity region R2 , the region overlapping the second low unit weight region 412 , the region on the extension line of the second low unit weight region 412 , and the width compression groove 82 . ), a region extending outward in the width direction from the low rigidity region R2, and a region extending obliquely forward from the low rigidity region R2 outward in the width direction may be exemplified.

In the center of the width direction W of the rear side area|region S3 of the absorbent article 1, the high rigidity area|region R1 and the low rigidity area|region R2 are formed. In Fig. 3, different slanted lines are attached to the high rigidity region R1 and the low rigidity region R2, and are shown. The high rigidity region R1 and the low rigidity region R2 are formed in the low unit weight region 41 and function as a deformation origin of the absorbent article 1 . The high rigidity region R1 is a region in which the central compression groove 81 is disposed, and serves as a starting point of deformation that protrudes toward the wearer when worn. The length in the longitudinal direction L of the high rigidity region R1 is longer than the length in the longitudinal direction L of the low rigidity region R2. The low rigidity region R2 is a region between the central compression grooves 81 and serves as a starting point at which the absorbent article deforms to follow the rounding of the body in the front-rear direction when worn. In the low rigidity region R2, the central compression groove 81 is not disposed. The high rigidity region R1 and the low rigidity region R2 are formed in the second low unit weight region 412, and since the absorbent core has a low unit weight and is easy to deform, it is easy to function as a deformation origin.

The rigidity of the low rigidity region R2 is lower than that of the high rigidity region R1. The rigidity is an indicator of the difficulty in deformation, and the higher the rigidity, the more difficult it is to bend. Rigidity can be measured with the Gurley stiffness value based on the measuring method of JISL1096. In the present embodiment, three high rigidity regions R1 are formed at intervals in the longitudinal direction L. As shown in FIG. The low rigidity region R2 includes a first low rigidity region R21 and a second low rigidity region R22 positioned behind the first low rigidity region R21. Therefore, at least two deformation|transformation origins are formed in the cross section along the longitudinal direction L of the absorbent article 1, and it is easy to arrange|position an absorbent article along the rounding of a buttocks.

The shape in the cross section along the longitudinal direction of the wearer is not the same curvature, and in particular, the curvature in the buttocks differs greatly depending on the position and the part of the wearer. Specifically, as shown in FIG. 5 , in a state where the wearer is standing, the curvature of the buttocks changes greatly in the portion P2 where the buttocks most protrude outward, and in a state in which the wearer is lying facing up, the hips are The curvature of the buttocks changes greatly at the front end P1 of the part that is crushed by contact with the bedding. In order to fit the back region of the absorbent article to the body more, the portion where the curvature of the buttocks changes significantly when the wearer is lying face up (the front end of the portion where the buttocks are crushed by touching the bedding) (P1), and the wearer The first low-rigidity region R21 and the second low-rigidity region R22 may be formed at positions corresponding to the portion (the portion where the buttocks protrude most outward) P2 in which the curvature of the buttocks changes greatly in the state.

The first low-rigidity region R21 can be arranged at a position of 90 mm to 130 mm rearward from the center in the longitudinal direction L of the crotch region S1 . A position of 90 mm to 130 mm rearward from the center of the longitudinal direction L of the crotch region S1 corresponds to the portion P1 in which the curvature of the buttocks changes greatly when the wearer lies on the stomach. easy. By forming the first low-rigidity region R21 to correspond to a portion where the curvature of the buttocks changes greatly when the wearer is lying on the stomach, the absorbent article easily follows the body when the wearer is lying on the stomach, The gap between the absorbent article and the body can be reduced.

The second low rigidity region R22 may be disposed at a position of 130 mm to 170 mm rearward from the center in the longitudinal direction L of the crotch region S1 . The position of 130 mm to 170 mm rearward from the center of the longitudinal direction L of the crotch region S1 is easy to be arrange|positioned corresponding to the part P2 whose curvature of a buttocks changes greatly in the state in which the wearer stands. By forming the second low-rigidity region R22 to correspond to the portion P2 where the curvature of the buttocks changes greatly when the wearer is standing, the wearer is in a standing state. Therefore, the absorbent article can easily follow the body, and the gap between the absorbent article and the body can be reduced.

The first low rigidity region R21 is disposed in front of the rear end edge of the standing portion 72 of the three-dimensional gather 70 . The 1st low-rigidity area|region R21 is formed in the position where the bulge of the buttocks abuts against the crushed front-side part P1 in the state which the wearer lied upward. The absorbent article is sandwiched between the wearer and the bedding with the bulge of the buttocks rearward than the collapsed front portion P1, and the bulge of the buttocks is located on the front side of the collapsed portion, so that the body is not sandwiched between the wearer and the bedding. placed according to Therefore, in the cross section along the front-back direction, the standing part 72 of a three-dimensional gather rises so that the front end edge of a standing part and the position where the bulge of a buttocks may contact|abut a crushed part may be connected. Therefore, even if the first low-rigidity region R21 is disposed in front of the rear end edge of the standing portion 72 of the three-dimensional gather 70, the first low-rigidity region R21 is located in the rising region of the standing portion in the lying state. The deformation origin is not formed, and the standing state of the three-dimensional gather 70 can be maintained.

The second low rigidity region R22 is disposed behind the rear end edge of the standing portion 72 of the three-dimensional gather 70 . Since the second low rigidity region R22 is formed behind the rising region of the standing portion when the wearer is standing, in the rising region of the standing portion 72 of the three-dimensional gather 70, the second low rigidity region ( R22) does not form a deformation origin, and the standing state of three-dimensional gathers can be maintained.

The low rigidity region R2 is located in front of the rear end edge of the joint portion 60 . The trailing edge of the junction part is the trailing edge edge in the whole junction part, and is the trailing edge edge of the 2nd main body junction part 62 in this embodiment. The 1st low-rigidity area|region R21 is located in front of the rear-end edge of the flap joint part 64, and is located in front of the rear-end edge of the 2nd main body joint part 62. As shown in FIG. The second low-rigidity region R22 is located in front of the rear end edge of the second body bonding portion 62 . As for the joint part 60, in order to maintain the fixed state to underwear, it is preferable to arrange|position a joint part behind the location where the curvature of the rounding of a buttocks changes greatly. When the joint is located behind the location where the rounding curvature of the buttocks changes greatly, the joint is less likely to deform when worn, and it is easier to maintain the joint state to the undergarment. By arranging the low-rigidity region R2 in response to a location where the curvature of the buttocks changes greatly, by arranging it along the rounding of the buttocks, and forming a junction on the back side of the location where the curvature of the buttocks changes greatly, the underwear by the junction part can maintain the bonding state of Accordingly, it is possible to increase the fitting property to the body.

Then, based on FIGS. 4-6, the wearing state of an absorbent article is demonstrated. 4 : has shown typically the deformed state of the absorbent article in the cross section along the width direction. The deformation state at the time of wearing of the absorbent article comprised in this way is demonstrated. An absorbent article is pinched|interposed by both legs of a wearer at the time of wearing, and the force from the outer side in the width direction to the inner side in the width direction is applied. When a force from the outside in the width direction W to the inside in the width direction is applied to the absorbent article 1 during wearing, the area between the central compression grooves 81 with the length compression groove 83 as a starting point is the wearer It protrudes to the side, and deforms so that the central compression groove 81 becomes the apex. In the center in the width direction of the absorbent core, the high-rigidity region serves as a deformation origin and deforms convexly toward the wearer to fit the gap between the left and right buttocks. At this time, since the rigidity of the central crimping groove is lower than that of the longitudinal crimping groove, when a force in the direction from the outside in the width direction to the inside in the width direction is applied to the rear region, the central crimping groove is more easily deformed than the longitudinal crimping groove, It becomes easier to protrude toward a wearer side more. In addition, since the rigidity of the central compression groove is low, even when the central compression groove is in close contact with the buttocks during wearing, discomfort during wearing can be suppressed and the feel can be improved.

5 schematically shows the deformation state of the absorbent article in a cross section along the longitudinal direction. Fig. 5 (a) shows a state in which a wearer wearing an absorbent article is standing, and Fig. 5 (b) shows a state in which the wearer's body, lying facing up, is deformed by being pressed by the bedding. The second low-rigidity region R22 is arranged so as to contact the portion P2 in which the wearer's curvature greatly changes when the wearer is standing. In the cross section along the longitudinal direction, the center of the absorbent core in the width direction when the wearer is standing. The second low-rigidity region R22 serves as the deformation origin and is arranged along the rounding of the body in the front-rear direction. The first low-rigidity region R21 is arranged so that the bulge of the buttocks is in contact with the portion P1 in which the curvature is largely changed at the front end of the portion where the bulge of the buttocks is in a state in which the wearer is lying facing upward. The central compression groove 81 formed in the high rigidity region R1 is formed in the top sheet 11 and the absorbent core 31, and has a higher rigidity compared to a configuration formed only in the absorbent core 31 . Therefore, even when the absorbent article 1 is repeatedly deformed when worn, the high rigidity region R1 continues to function as a deformation origin, suppresses twisting or unintentional bending of the absorbent core 31, It is possible to increase the fitability for

Further, in the rear region, a central compression groove 81 , a width compression groove 82 , and a length compression groove 83 are formed, and are divided into a plurality of sections by the compression grooves. Therefore, even when the absorbent article 1 is repeatedly deformed at the time of wearing, the high rigidity region R1 continues to function as a deformation origin, suppressing twisting and unintentional bending of the absorbent core 31, It is possible to increase the fitability for Further, in the rear region, a central compression groove 81 , a width compression groove 82 , and a length compression groove 83 are formed, and are divided into a plurality of sections by the compression grooves. Therefore, even when the absorbent article 1 is repeatedly deformed when worn, the absorbent material is hardly biased, and the absorbent core can be kept in contact with the body.

Further, on the outer side of the low rigidity region R2 in the width direction, an inclined portion 44 extending outward in the width direction from the low rigidity region and a width compression groove 82 formed in the inclined portion are formed. The inclined portion and the width compression groove 82 each function as a deformation origin extending in the width direction. Accordingly, the absorbent core is disposed so as to follow the cross section along the front-rear direction of the body not only in the center of the width direction of the rear region but also in the entire width direction of the rear region. The absorbent article may be further disposed along the buttocks, thereby improving the fitability.

In addition, since the longitudinal compression grooves 83 are spaced apart, in a cross-section along the longitudinal direction, the region 83G between the longitudinal compression grooves 83 serves as a deformation origin and is disposed along the rounding of the body. Since the region between the longitudinal compression grooves and the low rigidity region R2 both constitute a starting point of deformation, the entire width direction including the center of the width direction of the rear region is disposed along the front-back direction rounding of the body. Accordingly, the entire rear region of the absorbent article tends to fit the body.

6 is a perspective view schematically illustrating an absorbent article in a state worn by a wearer in a standing state. When worn, the crotch region is pinched by both legs of the wearer at the time of wearing, and a force is applied to the rear region from the outer side in the width direction to the inner side in the width direction and from the crotch region side to the rear region. Since the outer edge of the inclined portion extends inward in the width direction as it goes to the rear, the inclined portion deforms according to the force from the crotch region side, and wrinkles extending inward in the width direction are formed in the inclined portion as it goes rearward do. By absorbing the deformation due to the force from the leg of the wearer by the inclined portion, it is possible to suppress the occurrence of unintentional wrinkles or distortion, and the absorbent article can be further arranged along the body. In addition, since the width compression groove 82 extends from the outer side in the width direction to the inner side in the width direction as it goes to the rear side, it is easy to propagate the force along the force from both legs of the wearer. The width crimping groove 82 transmits the force from the wearer's legs to the center side in the width direction, so that the high rigidity region tends to protrude toward the wearer side. The absorbent article may be further disposed along the buttocks, thereby improving the fitability.

As mentioned above, although this invention was demonstrated in detail using embodiment mentioned above, for those skilled in the art, it is clear that this invention is not limited to embodiment demonstrated in this specification. The present invention can be practiced in the form of modifications and changes without departing from the spirit and scope of the present invention as defined by the scope of the claims. Accordingly, the description of the present specification is for the purpose of illustration and description, and does not have any limiting meaning with respect to the present invention.

In the present invention, the low rigidity region may have a lower rigidity than the high rigidity region, for example, a configuration in which the unit weight of the absorbent material is lower than that of the high rigidity region, a configuration in which the area ratio of the compression grooves is lower than that of the high rigidity region; The structure including at least any one of the structures in which the cut-out was formed in the absorbent core may be sufficient.

It is possible to provide an absorbent article capable of suppressing torsion or unintentional bending and improving the fit property to the body.

1: absorbent article 10: skin cotton sheet
20: non-skin surface sheet 30: absorbent body
31: absorbent core 41: low unit weight region
81: central crimping groove 82: width crimping groove
83: length crimp groove R1: high rigidity area
R2: low rigidity region R21: first low rigidity region
R22: second low stiffness region L: longitudinal direction
W: width direction

Claims (11)

lengthwise and widthwise directions orthogonal to each other;
a crotch region located in the crotch of the wearer, and
a rear region located behind the crotch region;
an absorbent core disposed in said crotch region and said back region;
a skin-facing sheet disposed on a skin-facing surface side rather than the absorbent core;
An absorbent article having a central pressing groove formed in the absorbent core and the skin surface sheet,
In the center of the width direction of the rear region, a plurality of high rigidity regions in which the central compression grooves are disposed along the longitudinal direction are disposed between the high rigidity region in the longitudinal direction, and the high rigidity region A low rigidity region with lower rigidity is formed,
The low rigidity region is a region between the central compression grooves,
A pair of longitudinal compression grooves formed at least in the absorbent core and extending in the longitudinal direction on both sides of the high rigidity region of the rear region, at least formed in the absorbent core and extending in the width direction A width compression groove is formed,
The longitudinal compression grooves are formed at intervals in the longitudinal direction,
The area between the longitudinal compression grooves is an area on the extension line of the width compression grooves, and is disposed in a region extending outward in the width direction from the low rigidity area. The method of claim 1, having a joint for fixing the absorbent article to the undergarment;
The said low-rigidity area|region is arrange|positioned in front of the trailing edge of the said joint part, The absorbent article. 3. The absorbent core according to claim 1 or 2, wherein the absorbent core has a low unit weight region in which the unit weight of absorbent material is lower than that of the surrounding absorbent core;
The low unit weight region is disposed in the low rigidity region and has an inclined portion extending outwardly in the width direction from the low rigidity region;
The outer edge of the inclined portion extends from the outer side in the width direction toward the inner side in the width direction as it goes rearward. The absorbent article according to claim 3, wherein at least the width compression groove is formed in the inclined portion of the low unit weight region. The absorbent article according to claim 4, wherein the width compression groove extends from the outer side in the width direction to the inner side in the width direction as it goes toward the rear side. The absorbent article according to claim 1 or 2, wherein the rigidity of the central pressing groove is lower than that of the longitudinal pressing groove. The absorbent article according to claim 1 or 2, wherein the low-rigidity region has a first low-rigidity region and a second low-rigidity region located behind the first low-stiffness region. According to claim 1 or 2, having a pair of three-dimensional gathers capable of standing on the wearer side,
Each three-dimensional gather has an elastic member that expands and contracts in the longitudinal direction, and has a standing portion capable of rising from the skin surface sheet,
A part or all of the low-rigidity region is disposed behind the rear edge of the rising portion. The method of claim 8, wherein the low-rigidity region has a first low-rigidity region and a second low-rigidity region located behind the first low-rigidity region;
The first low-rigidity region is disposed in front of the rear edge of the standing part,
The said 2nd low rigidity area|region is arrange|positioned behind the trailing edge of the said standing part, The absorbent article. delete delete

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