JP6705839B2 - Absorbent article - Google Patents

Description

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

Patent Document 1 discloses an absorbent article having concave grooves. The concave groove of Patent Document 1 is formed in the absorber, and is intermittently arranged in the longitudinal direction in the rear region. In the absorbent article of Patent Document 1, the back side region is arranged along the buttocks by bending the absorber in the region between the recessed grooves.

JP, 2006-263205, A

The recessed groove of Patent Document 1 is formed only in the absorber and is not formed integrally with the top sheet, so that sufficient rigidity may not be obtained in some cases. Therefore, when the absorbent article is repeatedly deformed with the concave groove as the base point, the shape of the concave groove may be deformed, and the deformed state intended by the absorber may not be maintained. Therefore, the absorbent body may be twisted or unintentionally broken, and the fit 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 that can suppress twisting and unintended folds and enhance the fit to the body.

The absorbent article according to the present invention is longer than the longitudinal direction (longitudinal direction L) and the width direction (width direction w) orthogonal to each other, the inseam region (inseam region S1) located in the inseam of the wearer, and the inseam 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 the skin facing surface side of the absorbent core. An absorbent article having a skin sheet (skin sheet 10) and a central squeeze groove (central squeeze groove 81) formed in the absorbent core and the skin surface sheet, the width of the rear side region A plurality of high rigidity regions (high rigidity regions R1) in which the central compression groove is arranged along the longitudinal direction, and a high rigidity region in the longitudinal direction, and the high rigidity region in the center of the direction. A gist is that a low-rigidity region (low-rigidity region R2) having a lower rigidity than that is provided.

It is a top view of the absorbent 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 state of the absorbent article in the cross section along the AA line shown in FIG. It is a figure which shows typically the wearing state of the absorbent article in the cross section along the BB line shown in FIG. 5A shows a state in which the wearer wearing the absorbent article stands up, and FIG. 5B shows a state in which the body of the wearer lying on his back is pressed and deformed by the bedding. ing. It is a perspective view of an absorptive article in the state where the wearer in the standing state wore it.

At least the following matters will be made clear by the present specification and the description of 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 behind the inseam region,
An absorbent core arranged in the crotch region and the rear side region,
A skin sheet arranged on the skin facing surface side of the absorbent core,
An absorbent article comprising the absorbent core and a central squeeze groove formed in the skin sheet,
At the center of the rear side region in the width direction, a plurality of high rigidity regions in which the central compression grooves are arranged along the longitudinal direction and a high rigidity region in the longitudinal direction are arranged, and the high rigidity region is formed. An absorbent article, comprising: a low-rigidity region having a lower rigidity than the region.

At the center of the absorbent core in the width direction, a high-rigidity region in which a central compression groove is arranged along the longitudinal direction is provided. In the widthwise center of the absorbent core, when a force is applied from the outside in the widthwise direction to the inside in the widthwise direction during wearing, the high-rigidity region serves as a deformation starting point toward the wearer in the cross section along the widthwise direction. It deforms convexly and fits in 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 of the body in the front-rear direction in the cross section along the longitudinal direction, with the low-rigidity region serving as the deformation base point.

The central squeeze 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 during wearing, the high-rigidity region continues to function as the deformation base point, and it is possible to suppress the absorbent core from twisting and unintentional bending and to improve the fit to the body.

Such an absorbent article,
It has a joint for fixing the absorbent article to underwear,
It is desirable that the low-rigidity region be located on the front side of the rear end edge of the joint.

In the cross section along the longitudinal direction, the curvature of the roundness of the buttocks changes. The portion where the curvature of the roundness of the buttocks greatly changes is a portion that is easily deformed when worn. In order to make the absorbent article further follow the outer shape 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 on the underwear by the joint portion, it is preferable to arrange the joint portion on the rear side of the portion where the curvature of the roundness of the buttocks largely changes. Since the low-rigidity region is located on the front side of the rear edge of the joint, the low-rigidity region is placed in correspondence with the location where the curvature of the buttocks changes significantly, and the curvature of the roundness of the buttocks changes greatly. The joint can be arranged corresponding to the rear side. The low-rigidity region serves as a deformation starting point, and the absorbent article can be deformed along the roundness of the buttocks. Further, since the joint portion is located on the rear side of the portion where the curvature of the roundness of the buttocks largely changes, the joint portion is less likely to be deformed when worn, and the joint state with the underwear 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 that of the surrounding absorbent core,
The low basis weight region has an inclined portion which is arranged in the low rigidity region and extends outward from the low rigidity region in the width direction,
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 toward the rear side.

According to such an absorbent article, since the low-rigidity area is arranged in the low basis weight area, the low-rigidity area is likely to be deformed, and the absorbent article is more likely to function as a deformation starting point. Further, when the crotch region is sandwiched between the wearer's legs when worn, 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 side 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 is deformed along the force from the crotch region side. Therefore, it is possible to absorb the deformation due to the force from the wearer's leg by the inclined portion, suppress the occurrence of unintended wrinkles and wrinkles, and further improve the fit to the body.

Such an absorbent article,
It is preferable that a width compression groove formed at least in the absorbent core and extending in the width direction is provided in the inclined portion of the low basis weight region.

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

Such an absorbent article,
It is desirable that the width pressing groove extends from the outer side in the width direction toward the inner side in the width direction as it goes toward the rear side.

By being sandwiched between the legs of the wearer, a force is applied to the rear side region in the direction from the width direction outer side to the width direction inner side from the front side to the rear side. The width compression groove extends from the outer side in the width direction to 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 width compression groove transmits the force from the wearer's leg to the center side in the width direction, and the high-rigidity region easily rises toward the wearer. The absorbent article is arranged more along the buttocks, and the fit to the body can be further enhanced.

Such an absorbent article,
It is desirable that a pair of longitudinal compression grooves formed in at least 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 the force in the direction from the outer side in the width direction to the inner side in the width direction is applied to the rear side region, the pair of longitudinal compression grooves serve as the deformation base points, and the pair of longitudinal compression grooves The area of is likely to be raised toward the wearer. The high-rigidity region is easily raised toward the wearer, the absorbent article is arranged more along the buttocks, and the fit to the body can be further enhanced.

Such an absorbent article,
The longitudinal compression grooves are provided at intervals in the longitudinal direction,
The region between the longitudinal compression grooves is preferably provided at a position which, together with the low rigidity region, constitutes a base point of deformation when worn.

According to such an absorbent article, since the longitudinal squeezing grooves are arranged at intervals, in the cross section along the longitudinal direction, the region between the longitudinal squeezing grooves serves as the deformation starting point, and the longitudinal direction of the body The absorbent article is easily arranged along the roundness of the. Further, since the base point of deformation is configured together with the region between the longitudinal squeezing grooves and the low-rigidity region when worn, the entire width direction including the widthwise center of the rear side region is easily arranged along the roundness in the front-back direction of the body. , The fit to the body can be further enhanced.

Such an absorbent article,
It is desirable that the rigidity of the central compression groove is lower than the rigidity of the longitudinal compression groove.

According to such an absorbent article, when the force in the direction from the outer side in the width direction to the inner side in the width direction is applied to the rear side region, the central compressed groove is more likely to be deformed than the longitudinal compressed groove, and the wearer is more likely to wear the central compressed groove. Easier to bulge to the side. In addition, since the rigidity of the central compressed groove is low, even when the central compressed groove is in close contact with the buttocks during wearing, it is possible to suppress the discomfort during wearing and improve the touch. Furthermore, since the rigidity of the longitudinal pressing groove is higher than the rigidity of the central pressing groove, it is easy to transmit the force in the direction from the width direction outer side to the width direction inner side by the longitudinal pressing groove to the region between the longitudinal pressing grooves in the width direction, The central squeeze groove is more easily raised on the wearer side. The high-rigidity region is easily raised toward the wearer, the absorbent article is arranged more along the buttocks, and the fit to the body can be further enhanced.

Such an absorbent article,
It is preferable that 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.

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, the deformation base points are arranged more along the roundness of the buttocks, and the high-rigidity region is on the wearer side. It becomes easier to swell, and the fit to the body can be improved. The first low-rigidity region can be arranged so as to hit a front end portion (end portion on the crotch side) in a portion where the bulge of the wearer's buttocks is collapsed when the wearer lies on his back. In addition, the second low-rigidity region can be arranged such that, when the wearer is standing, the buttocks of the wearer protrude outward and hit a portion where the curvature greatly changes. By providing the first low-rigidity region and the second low-rigidity region in this manner, the absorbent article is provided at a portion where the curvature of the body greatly changes, both when the wearer is lying on his back and when the wearer is standing. It is possible to further improve the fit to the body while preventing the absorbent core from twisting or unintentionally breaking by providing the deformation base point of the above.

Such an absorbent article,
On both outer sides in the width direction of the absorbent article, having 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 a standing portion that can stand up from the top sheet,
It is desirable that at least a part of the low-rigidity region is arranged rearward of a rear end edge of the upright portion.

At least a part of the low-rigidity region serves as a deformation base point in a cross section along the front-rear direction, and can be arranged so as to hit a portion where the curvature of the buttocks largely changes. The absorbent article is deformed from the low-rigidity region as a base point at a position corresponding to a position where the curvature of the buttocks largely changes, 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 stands up 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 when the wearer is standing. Since at least 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 buttocks greatly changes is formed in the rising area of the standing part of the three-dimensional gather. The standing state of the three-dimensional gather can be maintained without doing so.

Such an absorbent article,
The low-rigidity region has a first low-rigidity region and a second low-rigidity region located rearward of the first low-rigidity region,
The first low-rigidity region is disposed on the front side of the rear end edge of the upright portion,
It is desirable that the second low-rigidity region be disposed on the rear side of the rear end edge of the standing portion.

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

Since the second low-rigidity region is provided on the rear side of the standing region of the standing portion when the wearer is standing, the second low rigidity region is provided in the standing region of the standing portion of the three-dimensional gather when the wearer stands. The deformation base point due to the rigid region is not formed, and the standing state of the three-dimensional gather can be maintained. Further, when the wearer is sleeping, the absorbent article is sandwiched between the wearer and the bedding. Specifically, the bulge of the buttocks is crushed by the wearer lying on his back. The absorbent article is sandwiched between the wearer and the bedding behind the front end of the part where the bulge of the buttocks is collapsed, and is located in front of the part where the bulge of the buttocks is collapsed (the front end of the part where the bulge of the buttocks is collapsed). It is placed along the body without being sandwiched between the wearer and the bedding on the front side of the part). Therefore, the standing portion of the three-dimensional gather stands up so as to connect the front end edge of the standing portion and the position corresponding to the portion where the bulge of the buttocks is collapsed 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 standing portion rises in the sleeping state, and the standing state of the three-dimensional gather can be maintained.

=== Regarding the absorbent article according to the present 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 (a sheet of vaginal discharge), 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 designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratios of the respective dimensions may be different from the actual ones. Therefore, specific dimensions should be determined in consideration of the following description. Further, the drawings may include portions having different dimensional relationships and ratios.

FIG. 1 is a plan view of an absorbent article according to an embodiment. FIG. 2 is a rear view of the absorbent article. FIG. 3 is an enlarged view of the X portion shown in FIG. In addition, in FIG. 3, the three-dimensional gathers are omitted. The absorbent article 1 has a longitudinal direction L and a width direction W that are orthogonal to each other, and has a thickness direction T extending from the wearer's skin-facing surface side T1 to the non-skin-facing surface side T2. The skin-facing surface side T1 corresponds to the side facing the wearer's skin during use. The non-skin facing surface side T2 corresponds to the side opposite to the skin facing surface side T1 in use, that is, the side facing away from 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 excretory opening of the wearer, for example, the vaginal opening. When the absorbent article 1 is worn on underwear, the crotch region S1 is located in the crotch of the underwear and is located between the wearer's legs. The front area S2 is located on the front side of the crotch area S1. The front edge of the front side area S2 defines the front edge of the absorbent article 1. The rear region S3 is located rearward of the crotch region S1. The rear edge of the rear area 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 outside the outer edge of the absorber 30 in the crotch region S1 in the width direction W. The wings 3 are provided in the crotch region S1. The front end edge of the wing 3 is defined by the root of the wing 3, and corresponds to the portion located on the front side of the two innermost recessed portions in the width direction W. The front edge of the wing 3 defines the boundary between the crotch region S1 and the front side region S2. The rear end edge of the wing 3 is defined by the root of the wing 3, and corresponds to the portion located on the rear side of the two innermost recessed portions in the width direction W. The rear edge of the wing 3 defines the boundary between the crotch region S1 and the rear side region S3. The center of the crotch region S1 in the longitudinal direction L coincides with the center of the wing in the longitudinal direction. The hip flap 4 is provided in the rear side area 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 T1 of the absorber 30. The skin sheet 10 has a top sheet 11 and side sheets 12. The top sheet 11 is a liquid-permeable sheet that allows liquids such as body fluids to pass therethrough. The side sheet 12 covers the outer edge of the top sheet 11 in the width direction W, and extends outside the top sheet 11 in the width direction W. 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 portion 60 for fixing the absorbent article to the underwear. The joint part 60 includes a first main body joint part 61 arranged in a region overlapping the absorber 30 in the crotch region S1, and a second main body joint part 62 arranged in a region overlapping the absorber 30 in the rear side region S3. It has a wing joint 63 arranged on the wing 3 and a flap joint 64 arranged on the hip flap 4.

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 arranged on the inner edge of the side seat 12. Each three-dimensional gather 70 has a standing portion 72 that can stand up from the topsheet 11 as the skin sheet 10, and a base end portion 73 that is fixed to the topsheet 11 and that cannot stand upright. The base end portion 73 is arranged on the front side and the rear side of the standing portion 72. The base end portion 73 is a portion shown 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 has 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 basis weight area 41 and a high basis weight area 42. Here, the "low basis weight area" means an area including the absorbent core 31 having a lower basis weight than the absorbent core 31 around the area, or an area having no absorbent core 31. The high basis weight area 42 is an area other than the low basis weight area 41.

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

The third low weighted area 413 is continuous with the second low weighted area 412 and extends from the second low weighted area 412 to the outside in the width direction W. A plurality of the third low weighted regions 413 are provided at intervals in the longitudinal direction L. The inner edge of the third low weighted area 413 is continuous with the second low weighted area 412, and the outer edge of the third low weighted area 413 is located inside the outer edge of the absorbent core 31 in the width direction. The third low basis weight region 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 semicircle, or a triangle whose width in the width direction is shorter toward the rear side. In FIG. 1, the slanted portion 44 is shown by hatching.

In addition, the measurement of the "area weight of the absorber" in the present specification shall be performed by 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 in that state for 12 hours 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 package, the package is opened, the folded absorbent article is developed, and then the portion for measuring the basis weight 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 the skin sheet and the non-skin sheet, are removed from the cut-out portion, 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.

A compressed groove is formed in the absorbent article 1. The compression groove has a central compression groove 81, a width compression groove 82, and a longitudinal compression groove 83. The compressed groove may have at least the central compressed groove 81. The central compression groove 81 is formed by compressing at least the top sheet 11 that is the skin sheet 10 and the absorbent core 31 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 central compression groove 81, the width compression groove 82, and the longitudinal compression groove 83 of this Embodiment are formed in the top sheet 11, the cover sheet, and the absorption core 31 in the rear side area S3. The central compression groove 81, the width compression groove 82, and the longitudinal compression groove 83 are configured by an aggregate of a plurality of dot-shaped compression portions.

The central compression groove 81 extends in the longitudinal direction L and constitutes a deformation base point that extends in the longitudinal direction L when worn. The rigidity of the central compression groove 81 is lower than the rigidity 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 basis weight of the region having the central compression groove is the longitudinal compression groove. An example of the structure is lower than the fabric weight of the region having. The width pressing groove 82 extends in the width direction W on both outer sides of the center pressing groove 81 in the width direction W, and constitutes a deformation base point that extends in the width direction W when worn. The width compression groove 82 extends from the outer side in the width direction W to the inner side in the width direction W from the front side toward the rear side. The central compression groove 81 and the width compression groove 82 are formed in the low basis weight region 41. At least a part of the width compression groove 82 is provided in the inclined portion 44 of the low basis weight region 41.

The longitudinal compression groove 83 extends in the longitudinal direction L on both outer sides of the central compression groove 81 and the width compression groove 82 in the width direction W, and constitutes a deformation base point that extends in the longitudinal direction L when worn. The longitudinal compression groove 83 is formed across the low basis weight region 41 and the high basis weight region 42. The longitudinal compression grooves 83 are provided at intervals in the longitudinal direction. A region 83G between the longitudinal compression grooves 83 is provided at a position which constitutes a base point of deformation together with a low rigidity region R2 which will be described later when worn. As a position that constitutes a base point of deformation together with the low rigidity region R2, a region that overlaps with the second low basis weight region 412, a region on the extension line of the second low basis weight region 412, a region on the extension line of the width compression groove 82, and a low rigidity region. The region extending from R2 to the outer side in the width direction and the region extending from the low rigidity region R2 to the outer side in the width direction obliquely forward can be exemplified.

A high-rigidity region R1 and a low-rigidity region R2 are provided at the center of the rear side region S3 of the absorbent article 1 in the width direction W. In FIG. 3, the high rigidity region R1 and the low rigidity region R2 are shown with different diagonal lines. The high-rigidity region R1 and the low-rigidity region R2 are provided in the low basis weight region 41 and function as a deformation base point of the absorbent article 1. The high-rigidity region R1 is a region where the central compression groove 81 is arranged, and serves as a base point of deformation that bulges 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 area|region R2 is an area|region between the center compression grooves 81, and becomes a base point which an absorbent article deform|transforms so that it may follow the roundness of the front-back direction of a body at the time of wearing. The central compression groove 81 is not arranged in the low rigidity region R2. The high-rigidity region R1 and the low-rigidity region R2 are provided in the second low basis weight region 412, and since the absorbent core has a low basis weight and is easily deformed, it easily functions as a deformation base point.

The rigidity of the low rigidity region R2 is lower than the rigidity of the high rigidity region R1. The rigidity is an index of the difficulty of deformation, and the higher the rigidity, the more difficult it is to bend. The rigidity can be measured by the Gurley rigidity value based on the measuring method of JIS L1096. In the present embodiment, three high rigidity regions R1 are provided at intervals in the longitudinal direction L. The low-rigidity region R2 has a first low-rigidity region R21 and a second low-rigidity region R22 located behind the first low-rigidity region R21. Therefore, at least two deformation base points are formed in the cross section of the absorbent article 1 along the longitudinal direction L, and the absorbent article is easily arranged along the roundness of the buttocks.

The shape of the cross section along the wearer's longitudinal direction does not have the same curvature, and the curvature particularly in the buttocks varies greatly depending on the position and the part of the wearer. Specifically, as shown in FIG. 5, when the wearer is standing, the curvature of the buttocks significantly changes at the portion P2 where the buttocks are protruding to the outermost side, and when the wearer is lying on his back, the buttocks are The curvature of the buttocks greatly changes at the front end P1 of the portion crushed by hitting the bedding. In order to fit the rear region of the absorbent article to the body more, a portion where the curvature of the buttocks greatly changes in the state where the wearer lays on his/her back (front end portion of the portion where the buttocks hit the bedding and is crushed) P1, The first low-rigidity region R21 and the second low-rigidity region R22 are provided at positions corresponding to the portion (the portion where the buttocks protrudes to the outermost side) P2 in which the curvature of the buttocks significantly changes when the wearer stands upright. You may.

The first low rigidity region R21 can be arranged at a position of 90 mm to 130 mm rearward from the center of the crotch region S1 in the longitudinal direction L. The position of 90 mm to 130 mm rearward from the center of the crotch region S1 in the longitudinal direction L is likely to be arranged corresponding to the portion P1 where the curvature of the buttocks greatly changes when the wearer is lying on his back. By providing the first low-rigidity region R21 so as to correspond to the portion where the curvature of the buttocks greatly changes when the wearer lays on his back, the absorbent article easily follows the body when the wearer lays on his back. Therefore, the gap between the absorbent article and the body can be reduced.

The second low rigidity region R22 can be arranged at a position of 130 mm to 170 mm rearward from the center of the crotch region S1 in the longitudinal direction L. A position 130 mm to 170 mm rearward from the center of the crotch region S1 in the longitudinal direction L is likely to be arranged corresponding to the portion P2 where the curvature of the buttocks greatly changes when the wearer is standing. By providing the second low-rigidity region R22 so as to correspond to the portion P2 where the curvature of the buttocks greatly changes when the wearer is standing, the buttocks are absorbed at the outermost portion P2 when the wearer is standing. 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 arranged 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 provided at a position corresponding to the front portion P1 in which the bulge of the buttocks is collapsed when 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 buttocks is collapsed, and the body is not sandwiched between the wearer and the bedding on the front side of the collapsed portion of the buttocks. Are arranged along. Therefore, the standing portion 72 of the three-dimensional gather stands up so as to connect the front end edge of the standing portion and the position corresponding to the bulged portion of the buttocks 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 standing portion 72 of the three-dimensional gather 70, the deformation base point of the first low-rigidity region R21 within the rising region of the standing portion 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 R22 is arranged rearward 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 when the wearer is standing, the second low-rigidity region R22 is provided 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 on the front side of the rear end edge of the joint 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 on the front side of the rear end edge of the flap joint portion 64 and on the front side of the rear end edge of the second main body joint portion 62. The second low-rigidity region R22 is located on the front side of the rear end edge of the second main body joint portion 62. In order to maintain the fixed state on the undergarment, it is preferable that the joint part 60 be disposed on the rear side of the part where the curvature of the roundness of the buttocks largely changes. Since the joint portion is located rearward of the portion where the curvature of the roundness of the buttocks largely changes, the joint portion is less likely to be deformed when worn, and the joint state with the underwear is easily maintained. By arranging the low-rigidity region R2 corresponding to the location where the curvature of the buttocks greatly changes, the low rigidity region R2 is placed along the roundness of the buttocks, and the joint is provided on the rear side of the location where the curvature of the buttocks greatly changes. Thus, the state of being joined to the underwear by the joining portion can be maintained. Therefore, the fit to the body can be enhanced.

Next, the 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 deformed state of the absorbent article thus configured when worn will be described. The absorbent article is sandwiched by both legs of the wearer when worn, and a force is applied from the outside in the width direction to the inside in the width direction. When a force is applied to the absorbent article 1 from the outer side in the width direction W to the inner side in the width direction during wearing, the region between the central compression grooves 81 is bulged toward the wearer side with the longitudinal compression grooves 83 as the base point, and the central compression is performed. It deforms so that the groove 81 becomes the apex. At the center in the width direction of the absorbent core, the high-rigidity region serves as a deformation base point and deforms in a convex shape toward the wearer, and fits into the gap between the left and right buttocks. At this time, since the rigidity of the central compression groove is lower than the rigidity of the longitudinal compression groove, when the force in the direction from the outer side in the width direction to the inner side in the width direction is applied to the rear side area, the central compression groove is larger than the longitudinal compression groove. Is also easily deformed, and more easily raised toward the wearer. In addition, since the rigidity of the central compressed groove is low, even when the central compressed groove is in close contact with the buttocks during wearing, it is possible to suppress the discomfort during wearing and improve the touch.

Further, FIG. 5 schematically shows a deformed state of the absorbent article in a cross section along the longitudinal direction. 5A shows a state in which the wearer wearing the absorbent article stands up, and FIG. 5B shows a state in which the body of the wearer lying on his back is pressed and deformed by the bedding. ing. The second low-rigidity region R22 is arranged so as to hit the portion P2 where the wearer's curvature greatly changes when the wearer stands up. The center in the width direction of the absorbent core when the wearer is standing is arranged along the roundness of the body in the front-rear direction in the cross section along the longitudinal direction, with the second low-rigidity region R22 serving as the deformation base point. The first low-rigidity region R21 is arranged so as to hit a portion P1 where the curvature greatly changes at the front end portion of the portion where the bulge of the buttocks is collapsed when the wearer lays on his back. 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 higher rigidity than the 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 base point, suppresses the twisting and unintended bending of the absorbent core 31, and enhances the fit to the body. You can

Further, a central compression groove 81, a width compression groove 82 and a longitudinal compression groove 83 are formed in the rear side area, and are divided into a plurality of sections by the compression groove. Therefore, even when the absorbent article 1 is repeatedly deformed when worn, the high-rigidity region R1 continues to function as a deformation base point, suppresses twisting and unintentional bending of the absorbent core 31, and enhances the fit to the body. You can Further, a central compression groove 81, a width compression groove 82 and a longitudinal compression groove 83 are formed in the rear side area, and are divided into a plurality of sections by the compression groove. Therefore, even when the absorbent article 1 is repeatedly deformed when worn, the absorbent material is less likely to be 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, the inclined portion 44 extending from the low-rigidity region to the outer side in the width direction and the width compression groove 82 formed in the inclined portion are provided. The inclined portion and the width compression groove 82 each function as a deformation base point extending in the width direction. Therefore, the absorbent core is arranged not only in the widthwise center of the rear side region but also along the cross section along the front-back direction of the body not only in the widthwise direction of the rear side region. The absorbent article is arranged more along the buttocks, and the fit can be improved.

Further, since the longitudinal compression grooves 83 are arranged at intervals, the region 83G between the longitudinal compression grooves 83 serves as a deformation base point and is arranged along the roundness of the body in the cross section along the longitudinal direction. Since the region between the longitudinal compression grooves and the low-rigidity region R2 together form the base point of deformation, the entire width direction including the widthwise center of the rear side region is arranged along the roundness in the front-back direction of the body. .. Therefore, the entire rear region of the absorbent article easily fits on the body.

FIG. 6 is a perspective view schematically showing the absorbent article worn by the wearer in a standing state. At the time of wearing, the crotch region is sandwiched between the wearer's legs 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 rearward, the inclined portion is deformed along the force from the crotch region side, and wrinkles extending inward in the width direction as it goes rearward are formed in the inclined portion. It is formed. The inclined portion absorbs the deformation caused by the force of the wearer's leg, suppresses the occurrence of unintentional wrinkles and wrinkles, and allows the absorbent article to be arranged further along the body. Further, 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 toward the rear side, the force is easily propagated along the force from both legs of the wearer. The width pressing groove 82 transmits the force from the wearer's leg to the center side in the width direction, and the high-rigidity region easily rises to the wearer side. The absorbent article is arranged more along the buttocks, and the fit can be improved.

Although the present invention has been described in detail above 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 the present 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 claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

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

It is possible to provide an absorbent article that can suppress twisting and unintentional bending and can enhance the fit to the body.

1: Absorbent article 10: Skin surface sheet 20: Non-skin surface sheet 30: Absorber 31: Absorbent core 41: Low basis weight area 81: Central compression groove 82: Width compression groove 83: Longitudinal compression 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 (9)

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 behind the inseam region,
An absorbent core arranged in the crotch region and the rear side region,
A skin sheet arranged on the skin facing surface side of the absorbent core,
An absorbent article having the absorbent core and a central squeeze groove formed in the skin sheet,
At the center of the rear side region in the width direction, a plurality of high rigidity regions in which the central compression groove is arranged along the longitudinal direction and between the high rigidity regions in the longitudinal direction, and The low rigidity region, which has lower rigidity than the rigidity region, is provided .
The low rigidity region is a region between the central compression grooves,
A pair of longitudinal compression grooves formed in at least the absorption core and extending in the longitudinal direction, and at least outside the high rigidity region in the rear side region, and formed in at least the absorption core, and extending in the width direction. The width squeezing groove and are provided,
The longitudinal compression grooves are provided at intervals in the longitudinal direction,
The region between the longitudinal compression grooves is a region on an extension line of the width compression groove, and is arranged in a region extending outward in the width direction from the low rigidity region , the absorbent article. It has a joint for fixing the absorbent article to underwear,
The absorbent article according to claim 1, wherein the low-rigidity region is arranged on a front side 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 that of the surrounding absorbent core,
The low basis weight region has an inclined portion which is arranged in the low rigidity region and extends outward from the low rigidity region in the width direction,
The absorbent article according to claim 1 or 2, 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 as it goes toward the rear side. Wherein the said inclined portion of the low basis weight regions, at least before Symbol width compressed groove is provided, the absorbent article according to claim 3. The absorbent article according to claim 4, wherein the width pressing groove extends from the outer side in the width direction toward the inner side in the width direction as it goes toward the rear side. The absorbent article according to any one of claims 1 to 5, wherein the central compression groove has a rigidity lower than that of the longitudinal compression groove. 7. 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, according to any one of claims 1 to 6 . Absorbent article. Having 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 a standing portion that can stand up from the skin sheet,
The absorbent article according to any one of claims 1 to 7 , wherein at least a part of the low-rigidity region is arranged on the rear side with respect to the rear end edge of the standing 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 on the front side of the rear end edge of the upright portion,
The absorbent article according to claim 8 , wherein the second low-rigidity region is arranged on the rear side with respect to the rear end edge of the standing portion.

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