JPWO2018020690A1 - Absorbent articles - Google Patents

Abstract

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

Description

  The present invention relates to an absorbent article such as a sanitary napkin.

  Patent Document 1 discloses an absorbent article having a concave groove. The concave groove of Patent Document 1 is formed in the absorber, and is intermittently arranged in the longitudinal direction in the rear side region. As for the absorbent article of patent document 1, a rear side area | region is arrange | positioned along a collar part, when an absorber bends in the area | region between concave grooves.

JP 2006-263205 A

  Since the concave groove of Patent Document 1 is formed only in the absorbent body and is not formed integrally with the top sheet, sufficient rigidity may not be obtained. Therefore, when the absorbent article is repeatedly deformed with the concave groove as a base point, the shape of the concave groove may be deformed, and the deformed state intended by the absorbent body may not be maintained. For this reason, the absorbent body may be twisted or unintentionally folded, and the fit to the body may be reduced.

  This invention is made | formed in view of the above-mentioned subject, and it aims at providing the absorbent article which suppresses a twist and unintended folding and can improve the fitting property with respect to a 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, a crotch region (inseam region S1) located in the crotch of the wearer, and the crotch region. The rear side region (rear side region S3) located on the rear side, the absorbent core (absorbent core 31) disposed in the crotch region and the rear side region, and disposed on the skin facing surface side than the absorbent core An absorbent article having a skin sheet (skin sheet 10) and a central squeezing groove (central squeezing groove 81) formed in the absorbent core and the skin sheet, wherein the width of the rear side region In the center of the direction, a plurality of high-rigidity regions (high-rigidity region R1) in which the central pressing groove is arranged along the longitudinal direction and the high-rigidity region in the longitudinal direction are arranged. A low-rigidity region (low-rigidity region R2) having a lower rigidity than The gist of the Rukoto.

It is a top view of an absorptive article in one embodiment. It is a rear view of the absorbent article shown in FIG. It is an enlarged view of the X part shown in FIG. It is a figure which shows typically the wearing condition of the absorbent article in the cross section along the AA line shown in FIG. It is a figure which shows typically the wearing condition of the absorbent article in the cross section along the BB line shown in FIG. Fig.5 (a) has shown the state with which the wearer who mounted | wore the absorbent article stood, FIG.5 (b) shows the state which the body of the wearer who laid on his back was pressed and deformed by the bedding. ing. It is a perspective view of an absorptive article in the state where the wearer of the standing state wore.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
A longitudinal direction and a width direction orthogonal to each other;
Inseam area located in the inseam of the wearer,
A rear side region located on the rear side of the crotch region;
An absorbent core disposed in the crotch region and the rear side region;
A skin sheet disposed on the skin-facing surface side of the absorbent core; and
An absorbent article having a central squeezing groove formed on the absorbent core and the skin sheet,
In the center of the width direction of the rear side region, a plurality of high-rigidity regions in which the central squeezing grooves are arranged along the longitudinal direction and the high-rigidity region in the longitudinal direction are disposed, and the high-rigidity region An absorbent article, characterized in that a low-rigidity region having lower rigidity than the region is provided.

  At the center in the width direction of the absorbent core, a high-rigidity region is provided in which a central squeezing groove is disposed along the longitudinal direction. The center in the width direction of the absorbent core is directed toward the wearer when a force is applied from the outside in the width direction to the inside in the width direction during wearing, and the high-rigidity region is a deformation base point in the cross section along the width direction. Deforms into a convex shape and fits into the gap between the left and right buttocks. A low rigidity region is provided between the high rigidity regions in the longitudinal direction. The center in the width direction of the absorbent core is arranged along the roundness in the front-rear direction of the body, with the low-rigidity region as a deformation base point in a cross section along the longitudinal direction.

  The central squeezing groove in the high-rigidity region is formed in the skin sheet and the absorbent core, and has high rigidity as compared with the configuration formed only in the absorbent core. Therefore, even when the absorbent article is repeatedly deformed at the time of wearing, the high-rigidity region continues to function as a deformation starting point, suppresses the twisting or unintentional bending of the absorbent core, and improves the fit to the body.

Such an absorbent article,
Having a joint for fixing the absorbent article to underwear;
The low-rigidity region is preferably located in front of the rear end edge of the joint.

  In the cross section along the longitudinal direction, the curvature of the roundness of the flange changes. The part where the curvature of the roundness of the buttocks changes greatly is a part that is easily deformed when worn. In order to make the absorbent article more conform to the outer shape of the buttocks, it is preferable to arrange a 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 the underwear by the joint portion, it is preferable to dispose the joint portion on the rear side of the portion where the curvature of the roundness of the collar portion greatly changes. Since the low-rigidity region is located on the front side of the rear edge of the joint, the low-rigidity region is arranged corresponding to the location where the curvature of the buttock changes greatly, and more than the location where the curvature of the heel portion changes greatly. A joint portion can be arranged corresponding to the rear side. The low-rigidity region becomes a deformation base point, and the absorbent article can be deformed along the roundness of the buttock. In addition, since the joint portion is located on the rear side of the portion where the curvature of the rounded portion of the collar changes greatly, the joint portion is not easily deformed when worn, and the joint state to the undergarment is easily maintained.

Such an absorbent article,
The absorbent core has a low basis weight area where the basis weight of the absorbent material is lower than the surrounding absorbent core,
The low weight area has an inclined portion that is disposed in the low rigidity area and extends outward in the width direction from the low rigidity area,
It is desirable 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 it goes rearward.

  According to such an absorbent article, since the low rigidity area | region is arrange | positioned in the low fabric weight area | region, a low rigidity area | region is easy to deform | transform and it functions more easily as a deformation | transformation origin of an absorbent article. In addition, when the crotch region is sandwiched between the wearer's legs when worn, the rear region receives a force from the outer side in the width direction toward the inner side in the width direction and from the inseam region side toward the rear side region. . Since the outer edge of the inclined portion extends inward in the width direction as it goes rearward, the inclined portion is deformed along the force from the crotch region side. Therefore, the inclined portion absorbs deformation due to the force from the wearer's leg, suppresses occurrence of unintended wrinkles and kinks, and enhances fit to the body.

Such an absorbent article,
It is desirable that the inclined portion of the low weight area is provided with a width squeezing groove that is formed at least in the absorbent core and extends in the width direction.

  According to such an absorbent article, the width pressing groove serves as a deformation base point extending in the width direction in the inclined portion. Therefore, the absorbent article is easily deformed so as to follow the roundness in the front-rear direction of the body not only in the center in the width direction of the rear side region but also in the entire width direction of the rear side region. Absorbent articles are arranged more along the hips, and the fit to the body can be further enhanced.

Such an absorbent article,
The width pressing groove preferably extends from the outside in the width direction to the inside in the width direction as it goes to the rear side.

  A force in a direction from the outer side in the width direction toward the inner side in the width direction is applied from the front side to the rear side by being sandwiched between the legs of the wearer. The width squeezing groove extends from the outer side in the width direction toward the inner side in the width direction toward the rear side, and easily propagates the force along the force from both legs of the wearer. The force from the wearer's leg is transmitted to the center side in the width direction by the width squeezing groove, and the high-rigidity region is easily raised on the wearer side. Absorbent articles are arranged more along the hips, and the fit to the body can be further enhanced.

Such an absorbent article,
It is desirable that a pair of longitudinal squeezing grooves formed at least in the absorbent core and extending in the longitudinal direction are provided on both outer sides of the high-rigidity region in the rear side region.

  According to such an absorbent article, when a force in a direction from the outer side in the width direction toward the inner side in the width direction is applied to the rear side region, the pair of longitudinal squeezing grooves serves as a deformation starting point, and between the pair of longitudinal squeezing grooves It becomes easy to raise the area | region of a wearer side. The high-rigidity region can easily be raised on the wearer side, and the absorbent article can be arranged along the buttocks more, thereby improving the fit to the body.

Such an absorbent article,
The longitudinal pressing grooves are provided at intervals in the longitudinal direction,
It is desirable that the area between the longitudinal pressing grooves is provided at a position that constitutes a base point of deformation together with the low rigidity area when worn.

  According to such an absorbent article, since the longitudinal pressing grooves are arranged at intervals, in the cross section along the longitudinal direction, the region between the longitudinal pressing grooves serves as a deformation starting point, and the front-rear direction of the body It is easy to arrange the absorbent article along the roundness. Moreover, since the base point of a deformation | transformation is comprised with the area | region between a longitudinal compression groove | channel and a low-rigid area | region at the time of wear, the width direction whole region including the center of the width direction of a rear side area is easy to be arrange | positioned along the roundness of the front-back direction of a body. , The fit to the body can be further enhanced.

Such an absorbent article,
The rigidity of the central pressing groove is preferably lower than the rigidity of the longitudinal pressing groove.

  According to such an absorbent article, when the force in the direction from the outer side in the width direction toward the inner side in the width direction is applied to the rear side region, the central squeezing groove is more easily deformed than the longitudinal squeezing groove, and is more worn by the wearer. Easier to bulge to the side. Moreover, since the rigidity of a center pressing groove is low, even if it is a case where a center pressing groove closely_contact | adheres to a buttocks at the time of wear, the discomfort at the time of wear can be suppressed and the touch can be improved. Furthermore, since the rigidity of the longitudinal squeezing groove is higher than the rigidity of the central squeezing groove, it is easy to transmit the force in the direction from the outside in the width direction to the inside of the width direction by the longitudinal squeezing groove to the region between the longitudinal pressing grooves in the width direction, The central squeezing groove is more likely to be raised on the wearer side. The high-rigidity region can easily be raised on the wearer side, and the absorbent article can be arranged along the buttocks more, thereby improving the fit to the body.

Such an absorbent article,
The low-rigidity region preferably includes a first low-rigidity region and a second low-rigidity region located behind the first low-rigidity region.

  By having the first low-rigidity region and the second low-rigidity region, at least two deformation base points are formed in the cross-section along the longitudinal direction, and are arranged along the roundness of the buttock, and the high-rigidity region is on the wearer side. It can be easily raised and the fit to the body can be further enhanced. The first low-rigidity region can be disposed so as to hit the front end portion (end portion on the crotch side) in the portion where the bulge of the wearer's buttocks collapses in a state where the wearer lies on his back. In addition, the second low-rigidity region can be arranged so that the wearer's buttocks protrude outward and hit the portion where the curvature changes greatly when the wearer stands. By providing the first low-rigidity region and the second low-rigidity region in this way, the absorbent article is in a portion where the curvature of the body greatly changes even when the wearer lies on his back or when the wearer stands. The deformation base point can be provided, and the fit to the body can be further enhanced while suppressing the kinking or unintended folding of the absorbent core.

Such an absorbent article,
On both outer sides in the width direction of the absorbent article, it has a pair of three-dimensional gathers that can stand on the wearer side,
Each three-dimensional gather has an elastic member that expands and contracts in the longitudinal direction, and has an upright portion that can rise from the top sheet,
It is preferable that at least a part of the low-rigidity region is disposed on the rear side of the rear end edge of the upright portion.

  At least a part of the low-rigidity region becomes a deformation base point in a cross section along the front-rear direction, and can be arranged so as to hit a place where the curvature of the flange portion greatly changes. The absorbent article is deformed with the low-rigidity region as a base point at a position corresponding to a location where the curvature of the buttock changes greatly, and is bent so as to approach the front region and the rear region of the low-rigidity region. Further, 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 with the wearer standing. Since at least a part of the low-rigidity area is provided behind the rising area of the standing part, a deformation base point corresponding to the part where the curvature of the collar part greatly changes is formed in the rising area of the rising part of the three-dimensional gather. Without standing up, the standing state of the three-dimensional gather can be maintained.

Such an absorbent article,
The low-rigidity region has a first low-rigidity region and a second low-rigidity region located on the rear side of the first low-rigidity region,
The first low-rigidity region is disposed in front of a rear end edge of the upright portion,
The second low-rigidity region is preferably arranged on the rear side of the rear end edge of the upright portion.

  According to such an absorbent article, the deformation base point by the first low-rigidity region and the deformation base point by the second low-rigidity region can be provided, and the absorbent article is arranged along the roundness in the front-rear direction of the body. It is easy to be done. The first low-rigidity region can be disposed so as to hit the front side end portion in a portion where the bulge of the wearer's buttocks collapses in a state where the wearer lies on his back. In addition, the second low-rigidity region can be arranged so that the wearer's buttocks protrude outward and hit the portion where the curvature changes greatly when the wearer stands.

  Since the second low-rigidity region is provided on the rear side of the region where the standing part rises when the wearer is standing, the second low region is located within the region where the standing part of the three-dimensional gather is standing when the wearer is standing. The deformation base point due to the rigid region is not formed, and the standing state of the three-dimensional gather can be maintained. Moreover, in the state which the wearer slept, an absorbent article is pinched | interposed between a wearer and bedding. Specifically, the swell of the buttocks is crushed for the wearer lying on his back. The absorbent article is sandwiched between the wearer and the bedding on the rear side of the front end portion of the portion where the bulge of the buttock is crushed, and the front side of the portion where the bulge of the buttock is crushed (the front end of the portion where the bulge of the buttock is crushed) In front of the part) and placed along the body without being sandwiched between the wearer and the bedding. Therefore, the upright portion of the three-dimensional gather rises so as to connect the front end edge of the upright portion and the position where the bulge of the buttock is crushed in the cross section along the front-rear direction. Therefore, the deformation base point due to the first low-rigidity region is not formed in the region where the upright portion rises in the lying state, and the standing state of the three-dimensional gather can be maintained.

=== About the absorbent article which concerns on this Embodiment ===
Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. The absorbent article may be any absorbent article such as a panty liner (corimono sheet), a sanitary napkin, an incontinence pad, or a disposable diaper. In the following embodiments, a disposable sanitary napkin will be described as an example of an absorbent article.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like may differ from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

  Drawing 1 is a top view of an absorptive article in one embodiment. FIG. 2 is a rear view of the absorbent article. FIG. 3 is an enlarged view of a portion X shown in FIG. In FIG. 3, the three-dimensional gather is omitted. The absorbent article 1 has a longitudinal direction L and a width direction W perpendicular to each other, and a thickness direction T extending from the skin facing surface side T1 of the wearer to the non-skin facing surface side T2. The skin facing surface side T1 corresponds to the side facing the wearer's skin when in use. The non-skin facing surface side T2 corresponds to a side opposite to the skin facing surface side T1, that is, a side facing away from the wearer's skin when used.

  The absorbent article 1 has a crotch region S1, a front side region S2, and a rear side region S3. The crotch region S1 is a region facing the excretion opening of the wearer, for example, the vaginal opening. When the absorbent article 1 is attached to the underwear, the crotch region S1 is a region that is disposed between the legs of the wearer and is disposed between the legs of the wearer. The front side area S2 is located in front of the crotch area S1. The front end edge of the front side region S2 defines the front end edge of the absorbent article 1. The rear side region S3 is located on the rear side of the crotch region S1. The rear edge of the rear side region S3 defines the rear edge of the absorbent article 1.

  The absorbent article 1 has a wing 3 and a hip flap 4. The wing 3 and the hip flap 4 extend outward in the width direction W from the outer edge of the absorbent body 30 in the crotch region S1. The wing 3 is provided in the crotch region S1. The front edge of the wing 3 is defined by the root of the wing 3 and corresponds to a portion located on the front side of the two portions recessed most inside in the width direction W. The front edge of the wing 3 defines a boundary between the crotch region S1 and the front side region S2. The rear edge of the wing 3 is defined by the root of the wing 3, and corresponds to a portion located on the rear side of the two portions that are recessed most in the width direction W. The rear edge of the wing 3 defines a boundary between the crotch region S1 and the rear side region S3. The center in the longitudinal direction L of the crotch region S1 coincides with the center in the longitudinal direction of the wing. The hip flap 4 is provided in the rear side region S3.

  The absorbent article 1 includes a skin sheet 10, a non-skin sheet 20, and an absorber 30. The skin sheet 10 is provided on the skin facing surface side T <b> 1 from the absorbent body 30. The skin sheet 10 includes a top sheet 11 and a side sheet 12. The top sheet 11 is a liquid-permeable sheet that transmits liquid such as body fluid. 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 closer to the non-skin facing surface side T2 than the absorber 30.

  The non-skin surface sheet 20 is provided with a joint 60 for fixing the absorbent article to the undergarment. The joint portion 60 includes a first main body joint portion 61 disposed in a region overlapping the absorber 30 in the crotch region S1, a second main body joint portion 62 disposed in a region overlapping the absorber 30 in the rear side region S3, and It has the wing junction part 63 arrange | positioned at the wing 3, and the flap junction part 64 arrange | positioned at the hip flap 4. As shown in FIG.

  A pair of three-dimensional gathers 70 that can stand on the wearer side are provided on both outer sides in the width direction W of the absorbent article 1. 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 seat 12. Each three-dimensional gather 70 has an upright portion 72 that can rise from the top sheet 11 as the skin sheet 10 and a base end portion 73 that is fixed to the top sheet 11 and cannot stand up. The base end portion 73 is disposed on the front side and the rear side of the standing portion 72. The base end portion 73 is a portion indicated by hatching in FIG.

  The absorber 30 is provided between the skin sheet 10 and the non-skin sheet 20. The absorber 30 is arranged at least in the crotch region S1 and the rear side region S3. The absorber 30 includes an absorbent core 31 made of an absorbent material that absorbs liquid, and a cover sheet (not shown) that wraps the absorbent core 31. The absorber 30 has a low weight area 41 and a high weight area 42. Here, the “low weight area” means a region composed of the absorbent core 31 having a lower basis weight than the surrounding absorbent core 31 or a region not having the absorbent core 31. The high weight area 42 is an area other than the low weight area 41.

  The low weight area 41 includes a first low weight area 411 straddling the boundary between the crotch area S1 and the rear area S3, a second low weight area 412 disposed along the longitudinal direction L in the rear area S3, And a third low weight area 413 extending in the width direction W in the region S3. The absorbent article of the present embodiment only needs to have at least the second low weight area 412. The second low weight area 412 extends in the longitudinal direction L at the center in the width direction W of the rear side area S3. The front end edge of the second low weight area 412 is continuous with the rear edge of the first low weight area 411, and the rear edge of the second low weight area 412 is located in front of the rear edge of the absorbent core 31. To do.

  The third low weight area 413 is connected to the second low weight area 412 and extends outward in the width direction W from the second low weight area 412. A plurality of third low weight areas 413 are provided at intervals in the longitudinal direction L. The inner edge of the third low weight area 413 is continuous with the second low weight area 412, and the outer edge of the third low weight area 413 is located on the inner side in the width direction than the outer edge of the absorbent core 31. The third low weight area 413 has an inclined portion 44. The inclined portion 44 extends in the width direction W from a low rigidity region R2 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 toward the rear side. The shape of the inclined portion 44 in a plan view is, for example, a trapezoid, a semicircular shape, or a triangular shape having a short length in the width direction toward the rear side. In FIG. 1, the inclined portion 44 is indicated by hatching.

  In addition, the measurement of “weight of absorbent” in this specification is performed by the following measurement method. When the absorbent article 1 is enclosed in a package or the like, a sample that is removed from the package and left in that state in an atmosphere of 20 ° C. ± 2 ° C. and a relative humidity of 60% ± 5% RH is used.

  In the absorbent article packaged by the packaging body, the packaging body is opened, the folded absorbent article is expanded, and then the portion whose basis weight is measured is cut out from the absorbent article, and the weight of the cut out portion is measured. . Next, parts other than the absorber, such as a skin sheet and a non-skin sheet, are removed from the cut out part, and the weight of the absorber is measured. The basis weight is calculated based on the weight of the absorber and the area of the portion where the basis weight is measured.

  In the absorbent article 1, a compressed groove is formed. The pressing groove has a central pressing groove 81, a width pressing groove 82, and a longitudinal pressing groove 83. The pressing groove should just have the center pressing groove 81 at least. The central pressing groove 81 is formed by compressing at least the top sheet 11 and the absorbent core 31 that are the skin sheet 10 in the thickness direction T. The width pressing groove 82 and the longitudinal pressing groove 83 are formed by compressing at least the absorbent core 31 in the thickness direction T. The center pressing groove 81, the width pressing groove 82, and the longitudinal pressing groove 83 of the present embodiment are formed in the top sheet 11, the cover sheet, and the absorbent core 31 in the rear side region S3. The central squeezing groove 81, the width squeezing groove 82, and the longitudinal squeezing groove 83 are configured by an assembly of a plurality of dot-like pressing parts.

  The central squeezing groove 81 extends in the longitudinal direction L and constitutes a deformation base point extending in the longitudinal direction L when worn. The rigidity of the central pressing groove 81 is lower than the rigidity of the longitudinal pressing groove 83. As a specific configuration of the central compressed groove and the longitudinal compressed groove, the length of the central compressed groove in the width direction is shorter than the length of the longitudinal compressed groove in the width direction, and the basis weight of the region having the central compressed groove is the longitudinal compressed groove. A configuration that is lower than the basis weight of the region having can be exemplified. The width pressing groove 82 extends in the width direction W on both outer sides in the width direction W from the center pressing groove 81, and constitutes a deformation base point extending in the width direction W when worn. The width pressing groove 82 extends from the outside in the width direction W to the inside in the width direction W as it goes from the front side to the rear side. The center pressing groove 81 and the width pressing groove 82 are formed in the low weight area 41. At least a part of the width squeezing groove 82 is provided in the inclined portion 44 of the low weight area 41.

  The longitudinal pressing groove 83 extends in the longitudinal direction L on both outer sides in the width direction W from the central pressing groove 81 and the width pressing groove 82, and constitutes a deformation base point extending in the longitudinal direction L when worn. The longitudinal pressing groove 83 is formed across the low weight area 41 and the high weight area 42. The longitudinal pressing grooves 83 are provided at intervals in the longitudinal direction. The region 83G between the longitudinal pressing grooves 83 is provided at a position that constitutes a deformation base point together with a low-rigidity region R2 described later at the time of wearing. The positions constituting the base point of deformation together with the low-rigidity region R2 include a region overlapping the second low-weighted region 412, a region on the extended line of the second low-weighted region 412, a region on the extended line of the width squeezing groove 82, and a low-rigidity region A region extending outward in the width direction from R2 and a region extending obliquely forward from the low rigidity region R2 toward the outer side in the width direction can be exemplified.

  A high-rigidity region R1 and a low-rigidity region R2 are provided at the center in the width direction W of the rear region S3 of the absorbent article 1. In FIG. 3, the high-rigidity region R1 and the low-rigidity region R2 are shown with different oblique lines. The high-rigidity region R1 and the low-rigidity region R2 are provided in the low-weight area 41 and function as a deformation base point of the absorbent article 1. The high-rigidity region R1 is a region where the central squeezing groove 81 is disposed, and serves as a base point for deformation that protrudes toward the wearer when worn. The length of the high-rigidity region R1 in the longitudinal direction L is longer than the length of the low-rigidity region R2 in the longitudinal direction L. The low-rigidity region R2 is a region between the central squeezing grooves 81 and serves as a base point at which the absorbent article is deformed so as to follow the roundness in the front-rear direction of the body when worn. The central pressing groove 81 is not disposed in the low rigidity region R2. The high-rigidity region R1 and the low-rigidity region R2 are provided in the second low-weight area 412 and have a low basis weight of the absorbent core and are easily deformed.

  The rigidity of the low rigidity region R2 is lower than the rigidity of the high rigidity region R1. The rigidity indicates the difficulty of deformation. The higher the rigidity is, the more difficult it is to bend. The stiffness can be measured by a Gurley stiffness value in accordance with the measurement method of JIS L 1096. In the present embodiment, three highly rigid regions R1 are provided at intervals in the longitudinal direction L. The low rigidity region R2 includes a first low rigidity region R21 and a second low rigidity region R22 located on the rear side of the first low rigidity region R21. Therefore, at least two deformation base points are formed in the cross section along the longitudinal direction L of the absorbent article 1, and the absorbent article is easily arranged along the roundness of the buttock.

  The shape of the cross section along the longitudinal direction of the wearer is not the same curvature, and particularly the curvature at the buttocks varies greatly depending on the position and part of the wearer. Specifically, as shown in FIG. 5, when the wearer is standing, the curvature of the buttocks greatly changes in the portion P <b> 2 where the buttocks protrude to the outermost side, and when the wearer lies on his back, The curvature of the buttocks changes greatly at the front end P1 of the portion that is crushed by the bedding. In order to make the rear region of the absorbent article more fit to the body, the portion where the curvature of the buttocks changes greatly in the state where the wearer lies on his back (the front end of the portion where the buttocks collide with the bedding) P1, A first low-rigidity region R21 and a second low-rigidity region R22 are provided at a position corresponding to a portion P2 where the curvature of the buttock changes greatly when the wearer is lying down (a portion where the buttock protrudes outward). It's okay.

  The first low-rigidity region R21 can be disposed at a position of 90 mm to 130 mm rearward from the center in the longitudinal direction L of the crotch region S1. The position of 90 mm to 130 mm rearward from the center in the longitudinal direction L of the crotch region S <b> 1 is easily arranged corresponding to the portion P <b> 1 where the curvature of the buttocks changes greatly when the wearer lies on his back. By providing the first low-rigidity region R21 so as to correspond to a portion where the curvature of the buttocks greatly changes when the wearer is lying on his back, the absorbent article can easily follow the body when the wearer is lying on his back. Thus, the gap between the absorbent article and the body can be reduced.

  The second low-rigidity region R22 can 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 in the longitudinal direction L of the crotch region S <b> 1 is easily disposed corresponding to the portion P <b> 2 where the curvature of the buttocks changes greatly when the wearer stands. By providing the second low-rigidity region R22 so as to correspond to the portion P2 where the curvature of the buttocks changes greatly when the wearer is standing, absorption is performed at the portion P2 where the buttocks protrude to the outermost side when the wearer is standing. It becomes easier for the absorbent article to follow the body, and the gap between the absorbent article and the body can be reduced.

  The first low-rigidity region R <b> 21 is disposed on the front side of the rear end edge of the upright portion 72 of the three-dimensional gather 70. The first low-rigidity region R21 is provided at a position corresponding to the front portion P1 where the bulge of the buttocks is crushed in a state where the wearer lies on his back. The absorbent article is sandwiched between the wearer and the bedding on the rear side of the front portion P1 where the bulge of the buttock is crushed, and is not pinched between the wearer and the bedding on the front side of the portion where the bulge of the buttock is crushed. Arranged along. Therefore, the upright portion 72 of the three-dimensional gather rises so as to connect the front end edge of the upright portion and the position where the bulge of the buttock is crushed in the cross section along the front-rear direction. Therefore, even if the first low-rigidity region R21 is arranged in front of the rear end edge of the upright portion 72 of the three-dimensional gather 70, the deformation base point by the first low-rigidity region R21 is within the region where the upright portion rises in the lying state. Is not formed, and the standing state of the three-dimensional gather 70 can be maintained.

  The second low-rigidity region R <b> 22 is disposed on the rear side of the rear end edge of the standing portion 72 of the three-dimensional gather 70. Since the second low-rigidity region R22 is provided on the rear side of the region where the standing portion rises while the wearer is standing, the second low-rigidity region R22 is included in the region where the standing portion 72 of the three-dimensional gather 70 rises. The deformation base point is not formed, and the standing state of the three-dimensional gather can be maintained.

  The low rigidity region R2 is located in front of the rear end edge of the joint portion 60. The rear end edge of the joint portion is the rear end edge of the entire joint portion, and is the rear end edge of the second main body joint portion 62 in the present embodiment. The first low-rigidity region R21 is located in front of the rear end edge of the flap joint portion 64 and in front of the rear end edge of the second main body joint portion 62. The second low-rigidity region R22 is located in front of the rear end edge of the second main body joint portion 62. In order to maintain the fixed state to the underwear, it is preferable that the bonding portion 60 is arranged on the rear side of the portion where the curvature of the rounded portion of the collar changes greatly. When the joint portion is located on the rear side of the portion where the curvature of the roundness of the heel portion greatly changes, the joint portion is not easily deformed when worn, and the joint state to the underwear is easily maintained. By arranging the low-rigidity region R2 corresponding to the location where the curvature of the buttocks changes greatly, it is arranged along the roundness of the buttocks, and the joint is provided on the rear side of the location where the curvature of the buttocks changes greatly. Thus, the bonding state to the underwear by the bonding portion can be maintained. Therefore, the fit with respect to a body can be improved.

  Next, a wearing state of the absorbent article will be described based on FIGS. 4 to 6. FIG. 4 schematically shows a deformed state of the absorbent article in a cross section along the width direction. A deformation | transformation state is demonstrated at the time of wear of the absorbent article comprised in this way. The absorbent article is sandwiched between the wearer's legs when worn, and a force is applied from the outside in the width direction to the inside in the width direction. When a force from the outer side in the width direction W toward the inner side in the width direction is applied to the absorbent article 1 when worn, the region between the central pressing grooves 81 is raised from the longitudinal pressing groove 83 to the wearer side, and the central pressing is performed. It deform | transforms so that the groove | channel 81 may become a vertex. The center in the width direction of the absorbent core is deformed in a convex shape toward the wearer with the high-rigidity region serving as a deformation base point, and fits into the gap between the left and right hips. At this time, since the rigidity of the central pressing groove is lower than the rigidity of the longitudinal pressing groove, when the force in the direction from the outer side in the width direction toward the inner side in the width direction is applied to the rear side region, the central pressing groove is more than the longitudinal pressing groove. Are easily deformed, and more easily rise to the wearer side. Moreover, since the rigidity of a center pressing groove is low, even if it is a case where a center pressing groove closely_contact | adheres to a buttocks at the time of wear, the discomfort at the time of wear can be suppressed and the touch can be improved.

  Moreover, FIG. 5 has shown typically the deformation | transformation state of the absorbent article in the cross section along a longitudinal direction. Fig.5 (a) has shown the state with which the wearer who mounted | wore the absorbent article stood, FIG.5 (b) shows the state which the body of the wearer who laid on his back was pressed and deformed by the bedding. ing. The second low-rigidity region R22 is arranged so as to hit a portion P2 where the wearer's curvature greatly changes in a state where the wearer is standing. The center in the width direction of the absorbent core in the state where the wearer is standing is arranged along the roundness in the front-rear direction of the body, with the second low-rigidity region R22 serving as a deformation base point in the cross section along the longitudinal direction. The first low-rigidity region R21 is disposed so as to hit a portion P1 whose curvature greatly changes at the front end portion of the portion where the bulge of the buttocks is crushed in a state where the wearer lies on his back. The central squeezing 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 than the configuration formed only in the absorbent core 31. Therefore, even if the absorbent article 1 is repeatedly deformed at the time of wearing, the high-rigidity region R1 continues to function as a deformation starting point, suppresses the kinking or unintended folding of the absorbent core 31, and enhances the fit to the body. Can do.

  Moreover, the center pressing groove 81, the width pressing groove 82, and the longitudinal pressing groove 83 are formed in the rear side area, and it is divided | segmented into the some division by the pressing groove. 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 base point, suppresses the kinking or unintended folding of the absorbent core 31, and enhances the fit to the body. Can do. Moreover, the center pressing groove 81, the width pressing groove 82, and the longitudinal pressing groove 83 are formed in the rear side area, and it is divided | segmented into the some division by the pressing groove. Therefore, even if the absorbent article 1 is repeatedly deformed at the time of wearing, the absorbent material is not easily biased, and the absorbent core can be continuously applied to the body.

  Further, on the outer side in the width direction of the low-rigidity region R2, an inclined portion 44 that extends from the low-rigidity region to the outer side in the width direction and a width pressing groove 82 formed in the inclined portion are provided. The inclined portion and the width pressing groove 82 each function as a deformation base point extending in the width direction. Therefore, an absorption core is arrange | positioned so that not only the center of the width direction of a back side area but the cross section along the front-back direction of the body in the whole width direction of a back side area. An absorptive article is arranged along a heel part more and can improve fit nature.

  In addition, since the longitudinal pressing grooves 83 are arranged at intervals, in the cross section along the longitudinal direction, the region 83G between the longitudinal pressing grooves 83 serves as a deformation base point and is disposed along the roundness of the body. Since the region between the longitudinal squeezing grooves and the low-rigidity region R2 together constitute a deformation base point, the entire width direction including the center in the width direction of the rear side region is arranged along the roundness in the front-rear direction of the body. . Accordingly, the entire rear side area of the absorbent article is easily fitted to the body.

  FIG. 6 is a perspective view schematically showing an absorbent article in a state worn by a standing wearer. At the time of wearing, the crotch region is sandwiched between both legs of the wearer at the time of wearing, and a force is applied to the rear side 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 side region. Since the outer edge of the inclined portion extends inward in the width direction toward the rear side, the inclined portion is deformed along the force from the crotch region side, and the heel that extends inward in the width direction in the inclined portion toward the rear side It is formed. The inclined portion absorbs deformation due to the force from the wearer's leg, suppresses unintended wrinkles and twists, and can dispose the absorbent article more along the body. Moreover, since the width pressing groove 82 extends from the outer side in the width direction toward the inner side in the width direction toward the rear side, the force easily propagates along the force from the wearer's legs. The force from the wearer's leg is transmitted to the center side in the width direction by the width squeezing groove 82, and the high-rigidity region is easily raised on the wearer side. An absorptive article is arranged along a heel part more and can improve fit nature.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

  The low-rigidity area in the present invention only needs to be configured to have a lower rigidity than the high-rigidity area. For example, the structure has a lower basis weight of the absorbent material than the high-rigidity area, and the area ratio of the compressed grooves is lower than that of the high-rigidity area. The configuration may include at least one of a configuration and a configuration in which a cut is formed in the absorbent core.

  It is possible to provide an absorbent article that can suppress kinking and unintended folding and can enhance fit to the body.

1: Absorbent article 10: Skin sheet 20: Non-skin sheet 30: Absorbent body 31: Absorbing core 41: Low weight area 81: Central pressing groove 82: Width pressing groove 83: Long pressing groove R1: High rigidity area R2 : Low rigidity region R21: First low rigidity region R22: Second low rigidity region L: Longitudinal direction W: Width direction

Claims (11)

A longitudinal direction and a width direction orthogonal to each other;
Inseam area located in the inseam of the wearer,
A rear side region located on the rear side of the crotch region;
An absorbent core disposed in the crotch region and the rear side region;
A skin sheet disposed on the skin-facing surface side of the absorbent core; and
An absorbent article having a central squeezing groove formed on the absorbent core and the skin sheet,
In the center of the width direction of the rear side region, a plurality of high-rigidity regions in which the central squeezing grooves are arranged along the longitudinal direction and the high-rigidity region in the longitudinal direction are disposed, and the high-rigidity region An absorbent article, characterized in that a low-rigidity region having lower rigidity than the region is provided. Having a joint for fixing the absorbent article to underwear;
The absorbent article according to claim 1, wherein the low-rigidity region is disposed in front of a rear end edge of the joint portion. The absorbent core has a low basis weight area where the basis weight of the absorbent material is lower than the surrounding absorbent core,
The low weight area has an inclined portion that is disposed in the low rigidity area and extends outward in the width direction from the low rigidity area,
3. The absorbent article according to claim 1, wherein an outer edge of the inclined portion extends from the outer side in the width direction toward the inner side in the width direction toward the rear side.   The absorbent article according to claim 3, wherein the inclined portion of the low weight area is provided with a width squeezing groove formed at least in the absorbent core and extending in the width direction.   The absorbent article according to claim 4, wherein the width squeezing groove extends from the outer side in the width direction toward the inner side in the width direction toward the rear side.   6. The device according to claim 1, wherein a pair of longitudinal squeezing grooves formed at least on the absorbent core and extending in the longitudinal direction are provided on both outer sides of the high-rigidity region in the rear side region. Absorbent article as described in 1. The longitudinal pressing grooves are provided at intervals in the longitudinal direction,
The absorbent article according to claim 6, wherein the region between the longitudinal compressed grooves is provided at a position constituting a base point of deformation together with the low-rigidity region when worn.   The absorptive article according to claim 6 or 7 whose rigidity of said central pressing slot is lower than rigidity of said longitudinal pressing slot.   The absorption according to any one of claims 1 to 8, wherein the low-rigidity region includes a first low-rigidity region and a second low-rigidity region located on the rear side of the first low-rigidity region. Sex goods. It has a pair of three-dimensional gathers that can stand on the wearer side,
Each three-dimensional gather has an elastic member that expands and contracts in the longitudinal direction, and has an upright portion that can rise from the skin sheet,
The absorptive article according to any one of claims 1 to 9, wherein at least a part of the low-rigidity region is disposed on a rear side of a rear end edge of the upright portion. The low-rigidity region has a first low-rigidity region and a second low-rigidity region located on the rear side of the first low-rigidity region,
The first low-rigidity region is disposed in front of a rear end edge of the upright portion,
The absorbent article according to claim 10, wherein the second low-rigidity region is disposed on a rear side of a rear end edge of the upright portion.

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