JP2016119982A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of inhibiting leakage by fitting absorbent cores to the crotch and the hips of a wearer.SOLUTION: An absorbent article 1 includes: an excretory orifice contact area S1 facing the excretory orifice of a wearer; a rear-side area S2 located at a rear side with respect to the excretory orifice contact area; and absorbent cores 31 disposed at the excretory orifice contact area and the rear-side area. The rear-side area includes hip flaps 4 extending outward in the width direction with respect to outer edges 31E of the absorbent core in the excretory orifice contact area. The absorbent cores include a width slit 41 extending in the width direction of the absorbent article in an area between the excretory orifice contact area and the rear-side area.SELECTED DRAWING: Figure 1

Description

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

  Patent Document 1 discloses an absorption having a medium-high portion that protrudes toward the skin contact surface side in the excretory opening contact region, and a leak-proof groove in which the top sheet and the absorber are squeezed on both outer sides in the width direction of the medium-high portion. A sex product is disclosed. The excretion opening contact area of the absorbent article is fastened to the crotch part of the underwear, and a force toward the inner side in the width direction is applied by being sandwiched between the legs of the wearer while being worn. In the excretion opening contact area of the absorbent article of Patent Document 1, when a force directed inward in the width direction is applied, the leak-proof groove is bent toward the skin facing surface side of the wearer's crotch area, and accordingly the absorbent body The mid-high portion is raised (see paragraph 0016 of Patent Document 1).

JP 2012-239722 A

However, the absorbent article described above has the following problems.
Since the absorbent body extends rearward from the excretory opening contact area, when the absorbent body in the excretion opening contact area is deformed, the deformation is propagated to the absorbent body located behind the excretion opening contact area. Therefore, when the absorber in the excretory opening contact area is raised on the skin facing surface side, the deformation raised on the skin facing surface side is propagated to the rear absorber. Moreover, when the absorber in the excretion opening contact area is raised on the non-skin facing surface side, the deformation raised on the non-skin facing surface side is propagated to the rear absorber.

  The cross-sectional shape of the body along the width direction near the wearer's laceration (around the vaginal opening where menstrual blood appears) is such that the large labia protrudes from the base of the thigh and the center in the width direction protrudes toward the absorber Shape. Therefore, when the absorber in the excretory opening contact area is raised on the skin facing surface side, the absorber is not disposed along the large labia. As a result, a gap may be generated between the wearer's crotch and the absorbent article, and leakage may occur.

  In addition, the absorber in the excretory opening contact area may be pushed to the non-skin facing surface side by the convex large labia protruding toward the absorber side, and may be raised to the non-skin facing surface side. When the absorber in the excretory opening contact area is raised on the non-skin facing surface side, the deformation raised on the non-skin facing surface side is propagated to the rear absorber. The cross-sectional shape of the body along the width direction in the vicinity of the wearer's buttocks is such that the left and right buttocks swell and the space between these buttocks is recessed. Therefore, when the absorber is raised on the non-skin facing surface side, the absorber is not disposed along the buttock. As a result, a gap may be generated between the wearer's buttocks and the absorbent article, and leakage may occur.

  This invention is made | formed in view of the above-mentioned subject, and aims at providing the absorbent article which fits an absorption core with respect to a wearer's inseam and a buttocks, and can suppress a leak.

  In order to solve the above-described problems, an absorbent article (absorbent article 1) according to the present disclosure includes an excretory opening contact area (excretion opening contact area S1) facing the wearer's excretion opening and the excretion opening. An absorbent article having a rear side region (rear side region S2) located behind the contact region, the excretory opening contact region, and an absorption core (absorption core 31) disposed in the rear side region. The rear side region is provided with a hip flap (hip flap 4) extending outward in the width direction from the outer edge (outer edge 31E) of the absorbent core in the excretory opening contact region, The gist of the present invention is that the absorbent core has a width slit (width slit 41) extending in the width direction of the absorbent article between the excretory opening contact area and the rear side area.

  Moreover, the absorbent article (absorbent article 1) according to the present disclosure includes an excretory opening contact area (excretion opening contact area S1) facing the wearer's excretion opening, and a rear side of the excretion opening contact area. An absorptive article having a rear side region (rear side region S2) located at the rear, an excretory opening contact region and an absorbent core (absorbent core 31) disposed in the rear side region, The area is provided with a hip flap (hip flap 4) extending outward in the width direction from the outer edge (outer edge 31E) of the absorption core in the excretory opening contact area, The gist of the invention is to have a propagation suppressing portion (width slit 41) that suppresses the propagation of the deformation of the absorption core in the excretory opening contact area to the absorption core in the rear area.

  ADVANTAGE OF THE INVENTION According to this invention, an absorptive article which fits an absorption core with a wearer's inseam and buttocks, and can suppress a leak can be provided.

It is a top view of an absorptive article concerning an embodiment. It is a rear view of the absorbent article shown in FIG. It is a schematic cross section of the AA cross section shown in FIG. It is sectional drawing of the state with which the wearer of the absorbent article 1 shown in FIG. 1 was mounted | worn.

(1) Whole structure of absorbent article With reference to FIG. 1 thru | or FIG. 3, the whole structure of the absorbent article 1 which concerns on embodiment is demonstrated. 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 are different 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.

  FIG. 1 is a plan view of the absorbent article, and FIG. 2 is a rear view of the absorbent article. FIG. 3 is a cross-sectional view taken along line AA shown in FIG. The absorbent article 1 according to this embodiment is a sanitary napkin for night use.

  The absorbent article 1 includes a front-rear direction L extending to the wearer's front side (abdominal side) and rear side (back side), a width direction W orthogonal to the front-rear direction L, the skin-facing surface side T1 of the wearer and the non-skin And a thickness direction T extending to the facing surface side T2.

  The absorbent article includes an excretion opening contact area S1 disposed in the excretion opening contact area of the wearer, a rear side area S2 located on the rear side of the excretion opening contact area S1, and an excretion opening contact area S1. A front side region S3 located on the front side. The length in the front-rear direction L of the rear side region S2 is longer than the length in the front-rear direction L of the excretory opening contact region S1. The excretion opening contact area S1 is an area that is attached to the crotch part of the underwear while being attached to the underwear. A wing, which will be described later, is arranged in the excretion opening contact area S1. The boundary between the excretory opening contact area S1 and the rear side area S2 is a width slit 41 described later. The front end edge of the width slit 41 is the rear end edge of the excretion opening contact area S1, and the rear end edge of the width slit 41 is the front end edge of the rear side area S2. Further, the rear end edge of the rear side region S2 is a rear end edge of the absorbent article 1. The boundary between the excretory opening contact area S <b> 1 and the front side area S <b> 3 is the front edge of the wing 3. The front edge of the wing 3 is a root of the wing 3 and is a portion located on the front side of the portion of the wing 3 that is recessed most inside in the width direction. The base at the front side of the wing 3 is the front end edge of the excretion opening contact area S1 and the rear end edge of the front side area S3. Further, the front edge of the front region S3 is the front edge of the absorbent article 1. In FIG. 3, the range of the front-back direction of the excretion opening | mouth contact | abutting area | region S1, rear side area | region S2, and front side area | region S3 is shown.

  The absorbent article 1 includes an absorbent body 30, a skin surface sheet 10 positioned on the skin facing surface side T <b> 1 from the absorbent body 30, and a non-skin surface sheet 20 positioned on the non-skin facing surface side T <b> 2 than the absorbent body 30. . The skin sheet 10 covers a liquid-permeable surface sheet 11 that covers at least the center of the absorbent body 30 in the width direction, and an outer edge (outer edge in the width direction) of the surface sheet 11 and extends outward in the width direction. Side sheet 12. The non-skin surface sheet 20 is a liquid-impermeable sheet.

  The top sheet 11 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 11 covers at least the surface of the absorber 30. The surface sheet 11 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  The side sheet 12 can be selected from the same material as the top sheet 11. However, in order to prevent menstrual blood from flowing over the side sheet 12 to the outside of the absorbent article 1, the side sheet 12 preferably has hydrophobicity or water repellency. The side sheet 12 is disposed on the outer edge of the absorbent body 30, the wing 3 and the hip flap 4.

  The non-skin sheet 20 has substantially the same length as the skin sheet 10. The non-skin sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene, a breathable resin film, a spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace. it can.

  The absorbent body 30 includes an absorbent core 31 in which absorbent materials are stacked, and a core wrap 32 that covers the absorbent core 31. Examples of the absorbent material include hydrophilic fibers, pulp, and SAP. In the absorbent body 30 of the present embodiment, the rear end edge of the absorbent core 31 and the rear end edge of the core wrap 32 substantially coincide.

  The absorption core 31 is disposed in the excretory opening contact area S1 and the rear side area S2. In addition, the absorption core 31 may be arrange | positioned in the state divided | segmented into each of the excretion opening | mouth contact | abutting area | region S1 and the rear side area | region S2, and is arrange | positioned ranging over the excretion opening | mouth contact area | region S1 and the rear side area | region S2. It may be. Moreover, the absorption core 31 should just be arrange | positioned at least at the excretion opening | mouth contact | abutting area | region S1 and the rear side area | region S2, and may be arrange | positioned at the excretion opening | mouth contact area | region S1, the rear side area | region S2, and the front side area | region S3.

  The absorbent core 31 has a middle-high portion 33 positioned on the inner side in the width direction than the outer edge 31E of the absorbent core 31. The middle-high part 33 is located in the excretory opening contact area S1, and is located inside the outer edge 31E of the absorption core 31 of the excretion opening contact area S1 in the width direction. The thickness of the middle-high part 33 is thicker than the thickness of the outer edge 31E of the absorption core 31 in the excretion opening contact area S1. The basis weight of the absorbent material in the middle-high portion 33 is higher than the basis weight of the absorbent material on the outer edge 31E of the absorbent core 31 in the excretory opening contact area S1. The middle / high portion 33 is located on the rear side in the excretory opening contact area S <b> 1 and is adjacent to the width slit 41. The outer edge of the middle-high part 33 of the present embodiment is provided with a pressing part 80 in which the absorbent body 30 and the skin sheet 10 are compressed in the thickness direction.

  The absorption core 31 includes a width slit 41, a front / rear slit 42, and an auxiliary slit 43. The absorbent core 31 has a width slit 41, front and rear slits 42, and an auxiliary slit 43 configured so that the absorbent core 31 can be bent in the thickness direction T.

  The basis weight of the absorbent material of the width slit 41, the front / rear slit 42 and the auxiliary slit 43 is lower than the basis weight of the absorbent material of the surrounding absorbent core 31. The surrounding absorption core 31 is an absorption core in a region adjacent to a width slit or the like, for example, an absorption core adjacent to the width slit 41 in the excretory opening contact region S1, and adjacent to the width slit 41 in the rear side region S2. It is an absorbent core. The width slit 41, the front / rear slit 42, and the auxiliary slit 43 may be a region where the basis weight of the absorbent material is lower than that of the surrounding absorbent core 31, and may be a region with a basis weight of 0, or a design basis weight. Is 0, but may be a region where the absorbent material mixed from the surrounding absorbent core 31 is disposed.

  The design basis weight of the width slit 41, the front / rear slit 42, and the auxiliary slit 43 of the present embodiment is zero. Therefore, the absorbent material is disposed between the skin sheet 10 and the non-skin sheet 20 in the region overlapping the width slit 41 in the thickness direction T, the region overlapping the front and rear slits 42, and the region overlapping the auxiliary slit 43. Absent. In the thickness direction T, the skin sheet 10 and the non-skin sheet 20 are not joined in a region overlapping the width slit 41, a region overlapping the front / rear slit 42, and a region overlapping the auxiliary slit 43.

  Moreover, in the area | region which overlaps with the width | variety slit 41, the area | region which overlaps with the front / rear slit 42, and the area | region which overlaps with the auxiliary slit 43, it is located in the non-skin surface side of the core wrap 32 located in the skin opposing surface side of the absorption core 31 and the absorption core 31. The core wrap 32 may be joined or may not be joined. For example, according to the configuration in which the core wrap 32 positioned on the skin facing surface side of the absorbent core 31 and the core wrap 32 positioned on the non-skin facing surface side of the absorbent core 31 are joined, it is possible to suppress the deformation of the absorbent core 31. . Moreover, in the area | region which overlaps with the width slit 41, the area | region which overlaps with the front / rear slit 42, and the area | region which overlaps with the auxiliary | assistant slit 43, the surface sheet 11 and the core wrap 32 may be joined. In addition, in the region overlapping the width slit 41, the region overlapping the front and rear slits 42, and the region overlapping the auxiliary slit 43, the non-skin surface sheet 20 and the core wrap 32 may or may not be bonded. Also good.

  The width slit 41, the front and rear slits 42, and the auxiliary slit 43 serve as boundaries where the rigidity changes. Specifically, for example, the rigidity of the area in front of the width slit 41 is different from the rigidity of the area in the rear of the width slit 41. More specifically, the basis weight of the absorbent material in the region in front of the width slit 41 is higher than the basis weight of the absorbent material of the width slit 41. In addition, the basis weight of the absorbent material in the region behind the width slit 41 is higher than the basis weight of the absorbent material of the width slit 41.

  The width slit 41 extends in the width direction W between the excretory opening contact area S1 and the rear side area S2. The width slit 41 only needs to extend at least in the width direction, may be a straight line parallel to the width direction, or is not parallel to the width direction but is a straight line or a curved line inclined with respect to the width direction. Also good. The width slit of the present embodiment has a curved shape in which the center in the width direction of the width slit 41 protrudes backward. More specifically, the center of the width slit 41 in the width direction is located behind the outer edge of the width slit 41. The center of the width direction of the width slit 41 is a convex shape toward the rear. Note that the length of the width slit in the front-rear direction may be constant or may vary. The length of the width slit in the front-rear direction is 10 mm or more and 50 mm or less, and more preferably the length of the width slit in the front-rear direction is 10 mm or more and 30 mm or less.

  For example, when the length of the width slit 41 in the front-rear direction is less than 10 mm, it is possible to sufficiently obtain a function of buffering or dividing the movement on the front side of the width slit 41 and the movement on the rear side of the width slit 41. There are things that cannot be done. Further, when the length of the width slit 41 in the front-rear direction exceeds 50 mm, the action of buffering or dividing the movement on the front side of the width slit 41 and the movement on the rear side of the width slit 41 is increased, while absorption is performed. The sense of security as a property article may be reduced.

  Moreover, it is preferable that the length of the width direction of the width slit 41 is 25 mm or more. Generally, the length in the width direction (the length in the width direction of the portion having a relatively high basis weight) of the middle-high portion 33 of the sanitary napkin for night is often 25 mm or more and 30 mm or less. For example, if the middle-high part 33 is formed continuously in the excretory opening contact area S1 and the rear side area S2, the movement of the excretion opening contact area S1 may be interlocked with the rear side area S2 by the middle-high part. . However, when the length in the width direction of the width slit 41 is 25 mm or more, the middle-high portion 33 is divided in the front-rear direction, and the movement of the excretory opening contact area S1 can be suppressed from interlocking with the rear side area S2.

  The width slit 41 may be formed in the entire region in the width direction of the absorption core 31 or may be formed in a partial region in the width direction of the absorption core 31. The width slit 41 of the present embodiment is formed in the entire width direction of the absorbent core 31. The outer edge 41E of the outer edge 41E of the width slit 41 is located at the outer edge 31E of the absorbent core 31. Therefore, the absorption core 31 in the excretory opening contact area S1 and the absorption core 31 in the rear side area S2 are divided in the front-rear direction by the width slit 41. In the absorbent body 30 of the present embodiment, the outer edge of the absorbent core 31 and the outer edge of the absorbent body 30 substantially coincide. Accordingly, in the drawing, the outer edge 41E of the width slit 41 is shown to coincide with the outer edge of the absorber 30. Moreover, the width | variety slit 41 comprises the propagation suppression part which suppresses propagating the deformation | transformation of the absorption core 31 of the excretion opening | mouth contact | abutting area S1 to the absorption core 31 of the back side area S2.

  The front-rear slit 42 extends in the front-rear direction L in the rear side region S2. The front-rear slit 42 may extend at least in the front-rear direction, may be a straight line parallel to the front-rear direction, is not parallel to the front-rear direction, and is linear or curved inclined with respect to the front-rear direction. Also good. The front and rear slits 42 may be formed in the entire front-rear direction L of the absorbent core 31 in the rear side region S2, or may be formed in a partial region in the front-rear direction of the absorbent core 31 in the rear side region S2. Good. The front and rear slits 42 of the present embodiment are formed in the entire front and rear direction L of the absorption core in the rear side region S2. Therefore, the absorption core 31 in the rear side region S2 is divided in the width direction by the front and rear slits 42.

  Moreover, it is preferable that the front end edge of the front / rear slit 42 is located behind the position 30 mm behind the center 3LC in the front / rear direction of the wing 3. Moreover, it is preferable that the rear end edge of the front / rear slit 42 is located behind the position 200 mm behind the center 3LC in the front / rear direction of the wing 3. The length in the front-rear direction of the front-rear slit 42 is preferably 150 mm or more. In the cross section along the front-rear direction of the wearer's body, the groove between the hips starts from the area beyond the perineum and extends to the caudal bone. According to such a front-rear slit 42, a convex deformation having the front-rear slit as the apex is easily disposed in the groove between the flanges.

  The length in the width direction of the front and rear slits 42 is 1 mm or more and 15 mm or less. For example, when the length in the width direction of the front and rear slits 42 is less than 1 mm, when the front and rear slits 42 are deformed into a convex shape, the absorption cores 31 arranged with the width slits interposed therebetween interfere with each other and are stable. Therefore, it becomes difficult to deform into a convex shape. Further, when the length in the width direction of the front / rear slit 42 exceeds 15 mm, the convex deformed portion having the front / rear slit 42 as the apex is absorbed by the convex deformed portion when arranged in the gap between the flanges. Absorption of bodily fluids may be negligible because there is no core.

  The absorption core 31 in the rear side region S2 includes a first region 311 and a second region 312 and a third region 313 that are positioned outside the first region 311 in the width direction. FIG. 1 shows ranges in the width direction of the first region 311, the second region 312, and the third region 313. The first region 311, the second region 312, and the third region 313 are regions obtained by dividing the absorption core 31 of the rear side region S2 into three equal parts in the width direction. The first region 311 is a region located in the center in the width direction among the three divided regions. The second region 312 is a region located on one side in the width direction among the three divided regions. The third region 313 is a region located on the other side in the width direction among the three divided regions. In the configuration in which the length in the width direction of the absorption core in the rear side region S2 is changed, the absorption core 31 adjacent to the width slit 41 is a region divided into three equal parts in the width direction.

  The front and rear slits 42 are provided in the first region 311. The front / rear slit 42 may be arranged at the center in the width direction W of the absorbent article 1. The front and rear slits 42 are configured so that the absorption core can be bent in the thickness direction, and constitute a curved portion. In addition, the music part may be comprised not only by the front-back slit but by another structure. For example, the curved portion may be constituted by at least a compressed portion obtained by squeezing the absorbent core in the thickness direction, or may be constituted by a region having different rigidity due to the basis weight of the absorbent core being different from the surroundings. And an emboss formed by meshing the convex portions.

  The width slit 41 and the front and rear slits 42 constituting the curved portion are continuous. Therefore, in plan view, the absorption core 31 in the excretory opening contact area S1, the absorption core 31 on one side in the width direction W of the rear side area S2 (for example, the absorption core located on the left side of the wearer), and the rear The absorption core 31 on the other side in the width direction W of the side region S2 (for example, the absorption core located on the right side of the wearer) is divided. The width slit 41 and the front and rear slits 42 may be separated from each other.

  The auxiliary slit 43 is continuous with the front / rear slit 42 and extends outward in the width direction W from the front / rear slit 42. The auxiliary slit 43 only needs to extend at least in the width direction, and may be a straight line parallel to the width direction. May be. The auxiliary slits 43 extend on both sides in the width direction of the front and rear slits 42. A plurality of auxiliary slits 43 are provided at intervals in the front-rear direction L. The auxiliary slit 43 is located on the inner side in the width direction W than the outer edge 31E of the absorbent core 31 in the rear side region S2. That is, the absorbing material is disposed outside the auxiliary slit 43 in the width direction. The auxiliary slit 43 may extend to the outer edge 31E of the absorbent core 31 in the rear side region S2. The auxiliary slit 43 extends forward from the inner side in the width direction W toward the outer side in the width direction W.

  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 from the outer edge 31E of the absorbent core 31 in the excretory opening contact area S1.

  The wing 3 includes a side sheet 12 and a non-skin surface sheet 20. The center 3LC in the front-rear direction of the wing 3 is arranged to face the wearer's excretion opening. The wing 3 is configured to be foldable toward the non-skin surface sheet 20 and is folded back to the non-skin facing surface side of the crotch portion of the underwear when in use. The hip flap 4 is located on the rear side of the wing 3 and is provided in the rear side region S2. The hip flap 4 is configured to be disposed on the skin facing surface side of the underwear without being folded back to the non-skin facing surface side of the underwear during use. An absorbent material may be disposed on the wing 3 and the hip flap 4.

  As shown in FIG. 2, a non-skin facing surface of the non-skin surface sheet 20 is provided with an adhesive region 60 to which an adhesive for stopping the absorbent article on the underwear S is applied. The adhesive region 60 is disposed in the first main body adhesive region 61 and the second main body adhesive region 62 disposed on the non-skin facing surface side of the absorbent core 31, the wing adhesive region 63 disposed in the wing 3, and the hip flap 4. Hip flap adhesive region 64.

  The first main body adhesive region 61 is spaced apart from the second main body adhesive region 62 in the front-rear direction, and is disposed in front of the second main body adhesive region 62. The first main body adhesive region 61 is disposed in front of the width slit 41 and straddling the excretory opening contact region S1 and the front side region S3. The second main body adhesive region 62 is disposed in the rear region S2 on the rear side of the width slit 41.

  The width slit 41 and the front / rear slit 42 do not overlap the adhesive region 60 in the thickness direction T. In other words, the adhesive region 60 is not provided in the region where the width slit 41 and the front and rear slits are arranged in plan view. The wing 3 and the hip flap 4 are provided with an adhesive region 60.

  The adhesive region 60 is covered with a release sheet 65 in a state before use. The release sheet 65 prevents the adhesive from deteriorating before use. The release sheet 65 is peeled off by the wearer during use. In addition, in the absorbent article which does not have a peeling sheet, you may be comprised so that it may prevent that an adhesion | attachment area | region deteriorates before use with the packaging sheet which wraps an absorbent article separately.

The “thickness of the absorber” in this specification is measured 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.

The measurement position is the center in the width direction of the absorber. When measuring, it is measured not in a state where the absorbent article is contracted but in a state where the elastic member of the absorbent article is extended. Moreover, parts other than an absorber, such as skin sheets other than an absorber, and a non-skin surface sheet, are removed. A dial gauge PEACOCK manufactured by Ozaki Mfg. Co., Ltd. is used, a measuring element having a diameter of 10 mm is used, a specimen having a size of 30 mm × 30 mm is prepared, and the thickness of the specimen is measured. A measuring device adjusts so that the measurement pressure with respect to a test piece may be 3 g / cm < ² >. Here, with respect to 10 samples, the above-described measurement was performed in each state, and the average value was defined as the length.

Note that the measurement of “weight and density of absorber” 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 developed, and the thickness and area of the portion where the basis weight and density are measured are measured. Subsequently, the part which measures a fabric weight and a density is cut out from an absorbent article, and the weight of the cut-out part is measured. Next, parts other than the absorber, such as the top sheet and the back 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 absorbent body and the area of the portion where the basis weight and density are measured. The density is calculated based on the basis weight and thickness.

In addition, the “length” in this specification is measured 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.

  Next, using a spring measure (tape: glass fiber-containing polyvinyl chloride coating) manufactured by Shinwa Measurement Co., Ltd., the length of this state of the measurement target part is measured so as to be along the measurement target part. Here, with respect to 10 samples, the above-described measurement was performed in each state, and the average value was defined as the length.

(2) Action / Effect Since the width slit 41 constituting the propagation suppressing portion is provided between the excretory opening contact area S1 and the rear side area S2, the deformation of the absorption core 31 is caused by the width slit 41 of the absorption core 31. Propagation to the entire front-rear direction can be suppressed, and the absorption core 31 in the excretory opening contact area S1 and the absorption core 31 in the rear side area S2 can be deformed in different modes.

  FIG. 4 is a cross-sectional view of a state where the absorbent article 1 is attached to the wearer. Fig.4 (a) is sectional drawing along the width direction in the excretion opening | mouth contact | abutting area | region S1, FIG.4 (b) is sectional drawing along the width direction in the back side area | region S2. 4A is based on the BB cross section of FIG. 1, and FIG. 4B is based on the CC cross section of FIG. In FIG. 4, the line which shows a wearer's body is shown with a dashed-two dotted line. When wearing the absorbent article 1 as a sanitary napkin, the absorbent article is fastened to the undergarment S, and the undergarment is pulled up and worn. The dimension in the width direction of the absorbent core of a general sanitary napkin is designed wider than the dimension in the width direction between the wearer's crotch. Therefore, the excretion opening | mouth contact | abutting area | region S1 of the absorbent article 1 of the worn state is pinched | interposed by a wearer's both legs, and receives the force which goes to the inner side of the width direction from the outer side of the width direction. In general, the absorbent article 1 is deformed to conform to the shape of the wearer's body in the excretory opening contact area S1, and propagates the deformation backward.

  However, the cross-sectional shape of the wearer's body along the width direction W of the absorbent core 31 differs between the crotch vicinity and the buttocks vicinity. Specifically, the cross-sectional shape of the body along the width direction near the crotch area of the wearer's crotch region (per vaginal opening where menstrual blood appears) is such that the large labia protrudes from the base of the thigh, and the absorbent article Convex shape protruding to the side. In the inseam area of the wearer, the excretion opening contact area S1 of the absorbent article is arranged to face.

  Moreover, an anus and a fissure are located behind the perineum located behind the wearer's large labia. The cross-sectional shape of the body along the width direction near the back of the perineum is a shape in which the center in the width direction is recessed. The rear side area S2 of the absorbent article is arranged to face the wearer's buttocks.

  When the absorbent article is attached to the undergarment S and worn by the wearer, the absorbent core of the excretory opening contact area S1 is pushed down by the bulge of the large labia and deformed so as to rise to the non-skin facing surface side. To do. In the crotch of the wearer, the absorption core of the excretory opening contact area S1 is disposed along the body, and leakage at the crotch can be suppressed.

  Further, the deformation of the absorption core 31 in the excretory opening contact area S <b> 1 propagates backward in the area up to the width slit 41. The deformation of the absorption core in the excretory opening contact area S1 is divided by the width slit 41 and is difficult to propagate to the absorption core 31 in the rear side area S2. In the absorbent core 31 in the rear side region S2, the side portions (the second region 312 and the third region 313) of the absorbent core and the hip flap 4 are pushed down by the left and right collars. The center in the width direction of the absorption core 31 in the rear side region S2 is pushed inward in the width direction by the side portion of the absorption core 31 and the hip flap 4, is raised on the wearer side, and is arranged in the gap between the left and right hips. The Therefore, in a wearer's buttocks, the absorption core 31 of back side area S2 is arrange | positioned along a body, and the leak in a buttocks can be suppressed.

  In addition, when the wearer walks, the left and right feet are moved alternately. The movement of both feet during the walking motion is such that when the right foot is in front, the left foot is located behind, and when the right foot is behind, the left foot is located in front. The center in the width direction of the excretion opening contact area S1 of the absorbent article (portion where menstrual blood is excreted in the vicinity of the crypt) is in the direction in which the front leg is inclined to the left when the right foot is forward, and the left foot is forward , The front is inclined to the right.

  At this time, the sanitary napkin for night use in which the length in the front-rear direction of the rear side region is relatively long, the rear side region S2 is interlocked with the left and right movement received in the excretory opening contact region S1, and the leg Each time a movement is performed (for example, a walking movement), the rear side area S2 is also greatly moved from side to side. When the rear side area S2 touches left and right, the wearer's buttocks cannot be stably wrapped, and the fit is not stable. However, by making the deformation of the absorption core 31 in the excretory opening contact area S1 difficult to propagate to the absorption core 31 in the rear side area S2 by the width slit 41, the absorption core in the rear side area S2 can be stably fitted to the buttocks. You can continue. Therefore, back leakage can be suppressed. Furthermore, by keeping the absorption core of the rear side region S2 stably fitted to the buttock, it is possible to suppress the wearer's buttock and the absorbent article from being rubbed, and to suppress the deterioration of wearing feeling due to skin rubbing.

  The absorption core 31 in the rear side region S2 may have a curved portion configured such that the absorption core 31 can be bent in the thickness direction T. The absorption core 31 in the rear side region S2 is easily deformed from the curved portion. The said curved part is provided in the 1st area | region 311 located in the center of the width direction W of the absorption core 31 of rear side area S2. Therefore, the absorption core 31 in the rear side region S2 is easily deformed from the center in the width direction W as a base point. The curved portion serving as the deformation base point is easily arranged in the recess between the heel portions, and the absorbent core 31 can be arranged along the wearer's heel portion.

  The width slit 41 and the curved portion may be continuous. By the width slit 41 and the curved portion, the absorbent core 31 in the excretory opening contact area S1, the left absorbent core 31 in the rear area S2, and the right absorbent core 31 in the rear area S2 are each easily deformed independently. Become. Therefore, the absorption core 31 is deformed more flexibly and is easily arranged along the complex unevenness of the body.

  The curved portion may be constituted by the front and rear slits 42. By providing the front and rear slits 42, the absorption core 31 in the rear side region S2 can be separately deformed on the left and right sides, and the absorption core 31 in the rear side region S2 can be separately followed on the left and right. For example, when the wearer walks, the left and right feet are moved alternately. As the leg moves, the buttocks move alternately left and right. For example, when the entire width direction of the absorbent core 31 in the rear side region S2 is moved integrally, the entire absorbent core 31 in the rear side region S2 moves to the left and right due to the alternate movement of the legs, and the fit in the buttocks is not stable. There is.

  However, since the absorption core 31 in the rear side region S2 is divided into left and right by the front and rear slits 42, each of the absorption cores 31 sandwiching the front and rear slits 42 is moved by the alternate movement of the legs. Therefore, one absorption core 31 with the front / rear slit 42 interposed therebetween can be moved following the movement of the body, and the other absorption core 31 can be continuously fitted to the body.

  In addition, since the front and rear slits 42 are provided in the entire area of the absorption core 31 in the rear side region S2, the absorption core 31 in the rear side region S2 is easily deformed from the front and rear slits 42 as a base point. Since the front and rear slits 42 are formed in the entire area in the front and rear direction L, the absorbent core 31 is not disposed outside the front and rear slits 42 in the front and rear direction L. Therefore, when the absorbent article is deformed from the front / rear slit 42 as a base point, the fulcrum formed of the absorbent core 31 is not formed on the outer side in the longitudinal direction of the front / rear slit 42, and in the cross section along the width direction W of the absorbent article 1. The absorbent article can be bent at an acute angle with the front / rear slit 42 as a base point. Therefore, an absorbent article is arrange | positioned along the groove | channel between ridge parts, and, in more detail, a skin sheet is arrange | positioned in the groove | channel between ridge parts, and the clearance gap between the groove | channel between ridge parts and an absorbent article can be suppressed.

  The curved portion may not overlap the adhesive region 60 in the thickness direction T. Since the curved portion does not overlap the adhesive region in the thickness direction, the deformation of the curved portion is prevented from being excessively inhibited by underwear, and the absorbent core 31 is easily deformed based on the curved portion.

  Further, the width slit 41 may not overlap the adhesive region 60 in the thickness direction T. Since the width slit 41 does not overlap the adhesive region in the thickness direction, the deformation of the width slit 41 is prevented from being excessively inhibited by underwear, and the absorbent core is easily deformed with the width slit 41 as a base point.

  An adhesive region may be provided on the hip flap 4. The hip flap 4 is fastened to a portion of the underwear that covers the waist. The portion of the underwear covering the waist is worn so as to cover the entire circumference of the wearer's body. Since the adhesive region 60 is provided on the hip flap 4, the hip flap 4 can be fitted more to the body by the force with which the underwear covers the waist of the wearer.

  In the region overlapping with the width slit 41, the top sheet 11 and the non-skin sheet 20 may not be joined. When the surface sheet 11 and the non-skin surface sheet 20 are joined in a region overlapping with the width slit 41, the absorbent core 31 is sandwiched between the surface sheet 11 and the non-skin surface sheet 20, and the absorption core with the width slit 41 as a base point 31 deformation may be hindered. However, since the surface sheet 11 and the non-skin surface sheet 20 are not joined in the region overlapping the width slit 41, the deformation based on the width slit 41 is suppressed from being excessively inhibited by the surface sheet or the like. The absorption core 31 is easily deformed with the width slit 41 as a base point. Moreover, since the adhesive which joins the surface sheet 11 and the non-skin surface sheet 20 is not arrange | positioned in the area | region in which the width | variety slit 41 was provided, it is softer than the structure to which an adhesive agent is attached, and deforms more flexibly. it can.

  The outer edge 41E of the width slit 41 may be located on the outer edge 31E of the absorbent core. It becomes easy to deform | transform from a width slit to a base point over the width direction whole region of an absorption core. Moreover, since the absorption core of an excretion opening | mouth contact | abutting area | region and the absorption core of a rear side area | region are completely parted, it can suppress effectively that one deformation | transformation aspect propagates to the other.

  Moreover, the auxiliary | assistant slit 43 may be provided in the absorbent article. A deformation base point extending in the width direction is formed by the auxiliary slit 43 in the absorption core of the rear side region S2. The absorption core 31 in the rear side region S2 can be deformed with the auxiliary slit as a base point, and the absorption core 31 can be easily arranged along the roundness of the body in the cross section along the front-rear direction of the body.

  The excretory opening contact region S1 may have a middle-high portion 33 located on the inner side in the width direction than the outer edge 31E of the absorbent core 31. By providing the middle-high portion 33 in the excretory opening contact area S1, the wearer absorbs it at the center in the width direction of the excretion opening contact area S1 (inner side in the width direction than the outer edge 31E of the absorbent core 31). The core becomes easy to adhere. Therefore, as shown in the cross-sectional view shown in FIG. 4A, the adhesion in the excretory opening contact area S1 can be improved. As a result, it is possible to realize the fitting property of the absorbent article in the rear side region S2 and the fitting property of the absorbent article in the excretory opening contact region S1.

(3) Other Embodiments The absorbent article of the present embodiment is a sanitary napkin for night use that is attached to underwear. However, as another embodiment, an absorbent pad such as a urine absorption pad that is attached to a diaper. It may be.

  In the absorbent article 1 according to the modification, the outer edge 41E of the width slit 41 may be located on the inner side in the width direction than the outer edge 31E of the absorbent core 31. Since the absorbent material is disposed outside the width slit in the width direction, side leakage can be prevented.

  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.

1: Absorbent article 3: Wing 4: Hip flap 10: Skin sheet 11: Top sheet 12: Side sheet 20: Non-skin sheet 30: Absorbent body 31: Absorbing core 31E: Absorption core of the excretory opening contact area Outer edge 311: 1st area | region 312: 2nd area | region 313: 3rd area | region 32: Core wrap 41: Width slit (propagation suppression part)
42: Front and rear slits (curved part)
43: Auxiliary slit 60: Adhesive region 61: First main body adhesive region 62: Second main body adhesive region 63: Wing adhesive region 64: Hip flap adhesive region L: Front-back direction T: Thickness direction T1: Skin facing surface side T2: Non Skin facing surface side W: width direction S1: excretory opening contact area S2: rear side area S3: front side area

Claims (11)

An excretory opening contact area facing the excretion opening of the wearer;
A rear region located on the rear side of the excretory opening contact region;
An absorbent article having the excretory opening contact area and the absorbent core disposed in the rear side area,
The rear side region is provided with a hip flap extending outward in the width direction from the outer edge of the absorption core of the excretory opening contact region,
The absorbent core has a width slit extending in a width direction of the absorbent article between the excretory opening contact area and the rear side area. The absorption core in the rear side region has a first region, a second region and a third region respectively located outside the width direction of the first region,
The absorbent core in the rear side region has a curved portion configured to extend in the front-rear direction of the absorbent article in the first region and bendable in the thickness direction of the absorbent core. The absorbent article as described.   The absorbent article according to claim 2, wherein the width slit and the curved portion are continuous.   The absorbent article according to claim 2, wherein the curved portion is a front / rear slit extending in a front / rear direction of the absorbent article. A non-skin surface sheet located on the non-skin facing surface side of the absorbent core;
The non-skin facing surface of the non-skin surface sheet is provided with an adhesive region to which an adhesive for stopping the absorbent article on the underwear is applied,
The absorbent article according to any one of claims 2 to 4, wherein the curved portion does not overlap the adhesive region in the thickness direction.   The absorbent article according to claim 5, wherein the adhesive region is provided on the hip flap. A skin sheet positioned on the skin facing surface side of the absorbent core; and
A non-skin surface sheet positioned on the non-skin facing surface side of the absorbent core;
The absorbent article according to any one of claims 1 to 4, wherein the skin sheet and the non-skin sheet are not joined in a region overlapping the width slit in the thickness direction.   The absorbent article according to any one of claims 1 to 7, wherein an outer edge of the width slit is located on an inner side in the width direction than an outer edge of the absorbent core.   The absorbent article according to any one of claims 1 to 7, wherein an outer edge of the width slit is located at an outer edge of the absorbent core. The excretory opening contact area has a middle-high portion located on the inner side in the width direction than the outer edge of the absorbent core,
The absorptive article according to any one of claims 1 to 9 whose thickness of said middle high part is thicker than the thickness of the outside edge of said absorption core in said excretion mouth contact area. An excretory opening contact area facing the excretion opening of the wearer;
A rear side region located behind the excretory opening contact region;
An absorbent article having an absorption core disposed across the excretory opening contact area and the rear side area,
The rear side region is provided with a hip flap extending outward in the width direction from the outer edge of the absorption core of the excretory opening contact region,
The said absorption core is an absorbent article which has a propagation suppression part which suppresses propagating the deformation | transformation of the absorption core of the said excretion opening | mouth contact | abutting area to the absorption core of the said back side area.

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