JP2017094047A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article that exhibits excellent absorption performance even for an excretion liquid having a relatively high viscosity.SOLUTION: An absorbent article comprises a skin side sheet forming a skin facing surface, a non-skin side sheet forming a non-skin facing surface, and an absorber including an absorbent core 40. The absorbent article has a front part, an excretion part facing part, and a rear part in a longitudinal direction. The absorbent core 40 has a pair of side areas 45, 45 in an excretion part facing part B, and a central area 41 located between the pair of side areas and having a basis weight larger than that of the side area. The central area 41 has a thick area 42 having a thickness larger than each side area 45, and high-density areas 43 located between the thick area 42 and each side area 45 and having a smaller thickness and a higher density as compared with the thick area 42. A plurality of compression parts 6 as a local high density part recessed toward the inner side of the absorbent core in a thickness direction from the skin facing surface side or the non-skin facing surface side are formed in the high-density area 43 with an interval therebetween. The compression part 6 has a density higher than other portions of the high-density area 43.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an absorbent article.

2. Description of the Related Art Conventionally, from the viewpoint of improving fit to a wearer's body, it has been widely performed to provide a protruding portion that protrudes toward the wearer's skin side on an absorbent article such as a sanitary napkin. In such an absorbent article, it is common to provide a protrusion in a part of the absorbent core disposed inside.
In addition, for various purposes, irregularities are also formed on the absorbent body of the absorbent article. For example, in Patent Document 1, from the viewpoint of achieving both flexibility and thinness, a first compression recess extending from the front surface side to the back surface side and extending to the absorption layer and extending from the back surface side to the front surface in the longitudinal direction An absorbent article is described in which a second compression recess is formed that is recessed toward the side and extends to the absorbent layer. In addition, in Patent Document 2, from the viewpoint of reduction of stuffiness or the like due to absorbed liquid, the liquid absorbent layer includes a plurality of small absorbent parts that protrude to the non-skin facing surface side. It describes that a compression part that is recessed from the non-skin facing surface side toward the skin facing surface side is provided. Further, in Patent Document 3, in order to improve the absorption performance and fit while achieving weight reduction and low cost, a concave first emboss reaching from the upper layer to the lower layer is provided on the absorption layer having the upper layer and the lower layer. It is described that the second emboss having a concave shape shallower than the first emboss is formed only in the lower layer protruding in the width direction from the upper layer.

JP 2013-146405 A Japanese Patent Application Laid-Open No. 2014-110887 JP 2014-171573 A

  By the way, menstrual blood, which is a liquid absorbed by a sanitary napkin, may have a low viscosity or a relatively high viscosity depending on the period during menstruation, individual differences, and physical condition at that time. From the standpoint of preventing inconveniences such as stickiness and itching due to skin wetness, in all cases, the liquid excreted on the absorbent article is absorbed by the absorbent body so that it is isolated from the skin as quickly as possible. Although it is desired that the conventional absorbent articles have a high absorption performance for a liquid having a low viscosity, many of the conventional absorbent articles do not exhibit a sufficient absorption performance for a liquid having a high viscosity.

  The present invention relates to an absorbent article that exhibits good absorption performance even with excretory fluid having a relatively high viscosity.

  The present invention includes a skin-side sheet that forms a skin-facing surface, a non-skin-side sheet that forms a non-skin-facing surface, and an absorbent body including an absorbent core, and includes a front portion, an excretory portion-facing portion, and a rear portion in the longitudinal direction. The absorbent core is located between the pair of side regions and the pair of side regions in the excretory part-facing portion, and has a basis weight that is greater than that of the side regions. A large central region, and the central region is located between the thick region and each of the side regions, and the thick region is thicker than each of the side regions. Compared to the high-density region, the skin-facing surface side or the non-skin-facing surface side is inward in the thickness direction of the absorbent core. A plurality of local high-density portions that are recessed toward each other are formed with a space between each other, and the local high-density portions are formed in the high-density region. Denser than definitive other parts, there is provided an absorbent article.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which shows favorable absorption performance also about the excretion liquid whose viscosity is comparatively high, and there is especially little surface liquid residue is provided.

FIG. 1 is a partially broken perspective view of a sanitary napkin according to an embodiment of the present invention. 2A is a cross-sectional view taken along the line IIa-IIa in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. FIG. 3 is a plan view of the absorbent core of the sanitary napkin shown in FIG. 1 viewed from the skin facing surface side. FIG. 4 is a plan view of the absorbent core of the sanitary napkin shown in FIG. 1 as viewed from the non-skin facing surface side. Fig.5 (a) and FIG.5 (b) are enlarged plan views which show the example of preferable arrangement | positioning of the compression part formed in an absorptive core. FIG. 6 is a schematic view showing a main part of a fiber stacking apparatus preferably used for manufacturing the absorbent core of the sanitary napkin shown in FIG. Fig.7 (a)-FIG.7 (c) are explanatory drawings of the manufacturing method of the absorber of the sanitary napkin shown in FIG. 8 (a) and 8 (b) are explanatory diagrams of the operational effects of the sanitary napkin shown in FIG. FIG. 9A and FIG. 9B are schematic views showing a cross section along the drum circumferential direction of the outer peripheral portion of the fiber stacking drum in the fiber stacking apparatus shown in FIG. FIG. 10 is a view corresponding to FIG. 2 (a) in another embodiment of the present invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
As shown in FIG. 1, a sanitary napkin 1 (hereinafter also simply referred to as a napkin 1) that is an embodiment of the absorbent article of the present invention includes a skin-side sheet 10 that forms a skin-facing surface, and a non-skin-facing surface. The non-skin side sheet | seat 13 which forms and the absorber 14 containing the absorptive core 40 are provided. The absorber 14 is disposed between the skin side sheet 10 and the non-skin side sheet 13.
In an absorbent article such as a sanitary napkin, the skin facing surface P is a surface directed toward the wearer's skin when worn, and the above-described skin side sheet 10 forms the skin facing surface. Further, in an absorbent article such as a sanitary napkin, the non-skin facing surface Q is a surface that is directed to the side opposite to the wearer's skin side, usually the clothing side when worn, and the non-skin side sheet 13 described above is The non-skin facing surface is formed.
Further, the napkin 1 has a front part A, an excretory part facing part B, and a rear part C in the longitudinal direction X thereof. In an absorbent article such as a sanitary napkin, the longitudinal direction X is a direction that coincides with the wearer's front-rear direction when worn, and the width direction Y is orthogonal to the longitudinal direction X in plan view of the absorbent article. Direction.

The napkin 1 has an absorbent main body 15 having a configuration in which a skin-side sheet 10, an absorbent core 40, and a non-skin-side sheet 13 are laminated in the thickness direction at the center in the width direction Y, and an excretory part facing part. A pair of wing portions 17, 17 are formed on the left and right sides of the absorbent main body 15 in B, and a pair of rear flap portions 18, 18 are formed on the left and right sides of the absorbent main body 15 in the rear portion C.
As shown in FIG. 1, the skin-side sheet 10 in the present embodiment includes a liquid-permeable surface sheet 11 and a pair of side sheets 12 and 12 bonded to both sides thereof. The liquid-permeable topsheet 11 is arranged extending in the longitudinal direction X at the center in the width direction Y of the napkin 1. The side sheets 12 are arranged on both sides in the longitudinal direction X of the napkin 1, and as shown in FIG. 2 (a), in the state where a part on the inner edge 12a side is overlaid on the top sheet 11, respectively. It is joined to the surface sheet 11 at a position slightly outward in the width direction Y from the edge 12a. The pair of wing portions 17, 17 and the pair of rear flap portions 18, 18 include a side sheet 12 and a non-skin side sheet 13 that extend from both side edges of the absorbent main body 15. The surface of the wing portion 17 on the non-skin side sheet 13 side is provided with a wing portion adhesive portion (not shown) for fixing to the non-skin facing surface of the crotch portion of the shorts. A main body adhesive portion (not shown) for fixing the absorbent main body 15 to the inner surface of the shorts is provided on the surface. It is preferable that an adhesive portion is also provided on the surface of the rear flap portion 18 on the non-skin side sheet 13 side so as to be fixed to the inner surface of the shorts.

  The skin-side sheet 10 and the non-skin-side sheet 13 are bonded to each other with an adhesive at portions extending outward from the peripheral edge of the absorbent body 14 and heat-sealed by heat sealing or the like at the peripheral edge of the napkin 1. It is joined by.

  As shown in FIGS. 1 and 3, the absorbent body 14 in this embodiment includes a vertically long absorbent core 40 that is long in the same direction as the longitudinal direction X of the napkin 1. The absorptive core 40 consists of the fiber aggregate which consists of fiber materials, such as a pulp fiber, or what hold | maintained the high water absorption polymer between the fibers of this fiber aggregate. Moreover, the absorber 14 is provided with the core wrap sheet | seat 14c which wraps the absorptive core 40, as shown in FIG. Specifically, the absorbent core 40 is covered with a core wrap sheet 14c made of tissue paper or a water-permeable nonwoven fabric on both side edges in the longitudinal direction X and the entire upper and lower surfaces. The core wrap sheet 14 c is used for the purpose of preventing leakage of the forming material of the absorbent core 40 and improving the shape retention of the absorbent core 40. The absorbent core 40 is preferably covered with the entire circumference of a transverse section along the width direction of the absorbent core 40 by one or a plurality of core wrap sheets. For example, both sides of one core wrap sheet arranged on the skin facing surface or non-skin facing surface side of the absorbent core 40 are folded back to the other surface side of the absorbent core 40, and the folded portions are It is also preferable to be laminated on both side portions of another core wrap sheet covering the other surface. The sheets of the stacked portions may not be joined, but are preferably bonded.

Between the skin side sheet 10 and the absorbent body 14, between the absorbent core 40 and the core wrap sheet covering the skin facing surface side, the core wrap sheet covering the absorbent core 40 and the non-skin facing surface side, and It is not necessary for the gaps to be bonded to each other, but it is preferable that the gaps are bonded to each other by an adhesive that has been coated with an intermittent pattern such as a dot pattern, spiral pattern, stripe pattern, or checkered pattern.
In addition, in the napkin 1 of this embodiment, since the longitudinal direction and the width direction of the absorbent core 40 correspond to the longitudinal direction X and the width direction Y of the napkin 1 (absorbent article), the absorbent core 40 The longitudinal direction and the width direction are also expressed as the longitudinal direction X and the width direction Y, respectively. 2, 3, 5, 7, and 8, the core wrap sheet is not illustrated. However, at the position of the compression unit 6 in these drawings, the core wrap sheet is combined with the absorbent core 40. In addition, the absorber 14 is recessed from the skin facing surface P side toward the non-skin facing surface Q side. 2 (a) and FIG. 2 (b) are collectively shown in FIG. 2, FIG. 5 (a) and FIG. 5 (b) are collectively shown in FIG. 5, FIG. 7 (a) to FIG. 7 (c). FIG. 7, FIG. 8A and FIG. 8B are collectively referred to as FIG.

As shown in FIGS. 2 and 3, the absorbent core 40 is located in the excretory part facing portion B between the pair of side regions 45, 45 and the pair of side regions 45, 45. And a central region 41 having a basis weight larger than 45. As shown in FIG. 3, the central region 41 in the present embodiment is formed in an elliptical shape in plan view, and is formed in the central portion in the width direction Y of the absorbent core 40. As shown in FIG. 3, the central region 41 is preferably formed in a vertically long shape in which the length along the longitudinal direction X of the absorbent core 40 is longer than the length along the width direction Y of the absorbent core 40.
The pair of side regions 45, 45 are formed on both sides in the longitudinal direction of the absorbent core 40 so as to extend in the longitudinal direction X of the absorbent core 40. As shown in FIG. 3, the side regions 45 are formed to extend along the side edges 41 </ b> S on the outer sides of the side edges 41 </ b> S of the central region 41, and the inner sides along the side edges 41 </ b> S of the central region 41. It has the edge 45a and the linear outer edge 45b which comprises a part of side edge part of the absorptive core 40. As shown in FIG. The shape of the central region 41 in plan view may be other shapes such as an oval shape, a vertically long rectangular shape, an elliptical shape with a constricted central portion, a vertically long rectangular shape, a square shape, or a circular shape instead of the elliptical shape. .

  Moreover, the center area | region 41 in the absorptive core 40 is shown in FIG.2 and FIG.3 in the width direction of the absorptive core 40, and the thick area | region 42 thicker than each side area | region 45, and the thick area | region 42 And the side regions 45, and a high-density region 43 having a smaller thickness and a higher density than the thick region 42.

  As shown in FIG. 2, the thick region 42 of the absorbent core 40 in the present embodiment forms a protruding portion 44 on the non-skin facing surface side of the absorbent core 40. The protruding portion 44 is a part of the thick region 42 in the thickness direction. Further, the thick region 42 and the protruding portion 44 made of a part of the thick region 42 are formed in the central portion of the central region 41 in the width direction Y of the absorbent core 40, and the plane of the absorbent core 40 is In view, the absorbent core 40 has a long shape in the longitudinal direction X. The high density regions 43 are formed on both side portions of the central region 41 in the longitudinal direction so as to extend in the longitudinal direction X of the absorbent core 40 and have a shape that is long in the longitudinal direction X of the absorbent core 40. That is, in the present embodiment, the thick region 42, the protruding portion 44, and the high-density region 43 all have a length along the longitudinal direction X of the absorbent core 40 longer than a length along the width direction Y of the absorbent core 40. It is formed in a long vertically long shape. In the high density region 43, a pair of outer edges along the longitudinal direction of the absorbent core 40 are adjacent to the side region 45.

  Further, the thick region 42, the protruding portion 44, and the high-density region 43 are all formed in at least the excretory portion-facing portion B in the absorbent article such as the napkin 1. In the example shown in FIG. 1, it is formed from the vicinity of the front end of the excretory part facing part B to a part of the rear part C. The thick region 42, the protruding portion 44, and the high-density region 43 are all preferably formed over a length of 20% or more and 100% or less of the entire length in the longitudinal direction X of the absorbent core 40. It is more preferable that the conductive core 40 is formed over a length of 30% to 100% of the entire length.

The absorbent article of the present invention can be applied to the high-density region 43 of the absorbent core 40 from the skin facing surface P side or non-skin as in the napkin 1 of the present embodiment or the napkin 1A of the second embodiment to be described later. A plurality of local high-density portions 6 that are recessed from the facing surface Q side toward the inside in the thickness direction of the absorbent core 40 are formed at intervals.
As shown in FIGS. 2 and 3, the napkin 1 of the present embodiment has a local high density that is recessed from the skin facing surface P side to the non-skin facing surface Q side in the high density region 43 of the absorbent core 40. A plurality of compression sections 6 that are parts are formed in a dotted pattern with an interval between them.
Here, the compression part is a local high-density part in the present invention, and means a part whose density is higher than that of the periphery in plan view. In other words, the high-density region 43 includes the compressed portion 6 as a local high-density portion whose density is further increased.
As shown in FIG. 5A, in the compression unit 6 in the present embodiment, the shape of each compression unit 6 is circular in the plan view of the absorbent core 40, and the plurality of compression units are arranged in a staggered manner. It is formed with a pattern. In more detail, in the high-density region 43 and the adjacent side region 45, the longitudinal direction compression portion row 6x in which the compression portions 6 are arranged in series at intervals in the longitudinal direction X of the absorbent core 40 is absorbed. A plurality of rows are formed in the width direction Y of the conductive core 40, and the positions in the longitudinal direction X of the compression portions 6 of the adjacent longitudinal direction compression portion rows 6x are shifted by a half pitch. FIG. 5B is a diagram showing another preferred example of the arrangement of the compression parts 6, and the compression part rows 6 x in which the compression parts 6 are arranged in series at intervals in the longitudinal direction X of the absorbent core 40. Are formed in a plurality of rows in the lateral direction of the absorbent core 40, and the positions in the longitudinal direction X of the compression portions 6 of the adjacent longitudinal direction compression portion rows 6x coincide.
The compression unit 6 preferably has a circular shape in plan view, but may have a non-circular shape such as an ellipse, an oval, a square, a rectangle, or a triangle. In addition, as for an ellipse and an ellipse, it is preferable that the length of a major axis is 3.0 times or less of the length of a minor axis.

In each arrangement shown in FIGS. 5A and 5B, the arrangement pitch P1 of the compression sections 6 in each longitudinal compression section row 6x is preferably 110% with respect to the diameter L6 of the compression sections 6. More preferably, it is 120% or more, preferably 350% or less, more preferably 340% or less, and preferably 110% or more and 350% or less, more preferably 120% or more and 340% or less. Further, the arrangement pitch P2 of the longitudinal direction compression portion rows 6x in the width direction Y of the absorbent core 40 is preferably 110% or more, more preferably 120% or more, and preferably with respect to the diameter L6 of the compression portion 6. Is 350% or less, more preferably 340% or less, preferably 110% or more and 350% or less, more preferably 120% or more and 340% or less. Moreover, the diameter L6 of the compression part 6 becomes like this. Preferably it is 1.0 mm or more, More preferably, it is 1.5 mm or more, Preferably it is 5.0 mm or less, More preferably, it is 4.0 mm or less. It is 0 mm or more and 5.0 mm or less, More preferably, it is 1.5 mm or more and 4.0 mm or less.
When the compression portion 6 has a shape other than a circle, the longer one of the length in the longitudinal direction X and the length in the width direction Y of the compression portion 6 is set to the length of the “diameter”. Replace it. For example, in the case of an elliptical compression portion inclined with respect to the longitudinal direction X, the compression portion is divided into a longitudinal direction X component and a width direction Y component, and each length is divided into the length and width of the longitudinal direction X component. The length of the direction Y component is defined as the length of the “diameter”. In addition, the arrangement pitch P1 of the compression sections 6 in the longitudinal direction compression section row 6x is the length between the center points of the longitudinal direction X component of the compression section 6, and the arrangement pitch P2 of the compression sections 6 in the width direction Y is compression. The length between the center points of the Y component in the width direction of the portion 6 is set.

In the napkin 1 of the present embodiment, as shown in FIG. 3, the compression portions 6 are scattered in the same pattern in both the high density region 43 and the side region 45 adjacent to the high density region 43. However, instead of this, the compression part 6 may be formed only in the high-density region 43.
In the high-density region 43, it is preferable that a plurality of compression parts having different arrangement positions in the width direction Y of the absorbent core 40 are formed. For example, two or more longitudinal compression part rows 6x described above are formed. Preferably it is.

The high-density region 43 in the absorbent core 40 of the napkin 1 of the present embodiment uses the fiber stacking device 63 whose main part is shown in FIG. 7 (a), and the high-density region 43 as shown in FIG. 7 (a). 40A [FIG. 7 (FIG. 7 () a)] is manufactured, and then the stacked body 40A is covered with a core wrap sheet (not shown), and a wide width is applied to the stacked body 40A using a press device shown in FIG. The side portion 43 ′ of the thick region 41 ′ is formed by pressing to compress and compress.
In the napkin 1 of the present embodiment, a pair of side portions 43 ′ along the machine direction MD of the wide-thick region 41 ′ that is elliptical in plan view in the stacked body 40A is shown in FIG. As described above, the thickness is reduced by being compressed by pressurization by the press device, and the compressed and compressed side portion 43 ′ is not compressed or relatively weakly compressed compared to the thick wall region 42. The high density region 43 has a high density.

As shown in FIG. 7C, an embossing roll 74 and an anvil roll 76 are formed in the high-density region 43 and the side region 45 adjacent to the high-density region 43 in the absorbent core 40 of the napkin 1 of this embodiment. The compression part 6 mentioned above is formed by the embossing by the embossing apparatus provided with. Therefore, in the high density area | region 43 of the napkin 1 of this embodiment, the compression part 6 in the high density area | region 43 is not formed in the part in which the compression part 6 is formed by the part compressed by embossing. The density is higher than that of the portion. In the side region 45, the portion where the compression portion 6 is formed is formed by the compression portion 6 in the side region 45 by the amount compressed by embossing. The density is higher than that of the unfinished part.
In addition, the side area | region 45 in the absorptive core 40 of the napkin 1 of this embodiment is not compressed with the press apparatus, or is compressed weakly compared with the side part 43 'of wide-thick area | region 41'. Further, the basis weight is lower than that of the high-density region 43 and the thick-walled region 42, and the density is lower than that of the high-density region 43.

The napkin 1 of the present embodiment is used by being fixed to the crotch portion of the shorts in the same manner as a normal sanitary napkin.
When a liquid such as menstrual blood is discharged on the top sheet 11 of the excretory part facing part B of the napkin 1 while the napkin 1 is worn, the liquid is reduced to the basis weight as shown by an arrow a in FIG. It is absorbed by the central region 41 having a large amount. The central area 41 has a high absorption capacity because of its high basis weight, and is easy to hold excrement. In addition to this, the presence of the thick region 42 in the central region 41 and the high-density region 43 adjacent to the thick region 42 makes it easy for liquid to be absorbed deeply in the thickness direction, and a part of the liquid to the high-density region 43. The liquid is absorbed at a higher speed because it is better diffused and held by the density gradient. For this reason, it is difficult for the liquid to remain on the skin-side sheet and it is difficult for the liquid to return from the absorbent core 40 to the top sheet 11, so that it is difficult for the wearer's skin to feel the wetness of the liquid.
On the other hand, as shown in FIG. 8 (b), the compression part 6 provided in the high-density region 43 is recessed from the skin facing surface side toward the non-skin facing surface side, and is a portion located around in the plan view Since the density is higher and the density of the high-density region 43 is increased on the skin contact surface side, even the highly viscous liquid that flows on the surface of the absorber 14 in the width direction Y is absorbed by the portion. It becomes easy. Here, since the high density region 43 is located adjacent to the thick region 42, the liquid is easily held in the thick region 42, and the basis weight of the high density region 43 is higher than that of the side region 45. The high density region 43 tends to have a margin in the liquid absorption capacity. For this reason, since it is easy to absorb and hold | maintain a liquid from the skin contact surface side also in the high-density area | region 43, the liquid leakage from the width direction is suppressed.
By such an action, according to the napkin 1 of the present embodiment, not only the liquid having a low viscosity but also the liquid having a relatively high viscosity, the surface sheet 11 or the surface sheet 11 and the absorbent body 14 are interposed. It is possible to effectively prevent stickiness and discomfort caused by liquid re-adhering to the skin, and to be induced by excessively moistened skin. It is also possible to effectively prevent skin itchiness. It also has excellent leakage prevention performance.
Such an effect is more reliably achieved by forming the compression portions 6 in the high density region 43 in the form of dots.

Further, in the absorbent core 40 in the napkin 1 of the present embodiment, the side regions 45 and 45 and the central region 41 are integrally formed, and the above-described effects are more reliably achieved without impeding the liquid transferability. The
In this specification, “integrally molded” means that it is formed as a continuous unitary object, which is different from the case where members manufactured in different processes are joined by a bonding means such as an adhesive or compression. Means. Accordingly, there are no adjacent portions or coupling portions between the cores produced when two separately manufactured absorbent cores are arranged side by side at the boundary between the central region 41 and the side regions 45 and 45. Moreover, in the napkin 1 of this embodiment, the whole absorptive core 40 is integrally molded, and a portion 52d that forms the protruding portion 44 and a portion 52u closer to the skin side in the thick region 42 described later. Similarly, there are no adjacent portions or connecting portions between the layers.

  Moreover, in the napkin 1 of this embodiment, since the compression part 6 is formed also in the surface of the side area | region 45 in the skin opposing surface side in addition to the high density area | region 43, on the surface sheet 11 which overlaps with the side area | region 45 Or the liquid discharged on the top sheet 11, in the top sheet 11, or between the top sheet 11 and the absorber 14 and reaching the side region 45 has a relatively high viscosity. Is also absorbed smoothly into the side region 45 as indicated by the arrow d. Thereby, the absorption performance with respect to excretory fluid with comparatively high viscosity improves further.

  Moreover, in the napkin 1 of this embodiment, as shown to Fig.2 (a), since the thick region 42 has formed the protrusion part 44 in the surface at the non-skin opposing surface side in the absorptive core 40, it is thick. The adhesiveness between the skin-side sheet 10 and the absorbent body 14 can be enhanced while ensuring a high absorption capacity in the meat region 42. Thereby, the absorption performance with respect to excretory fluid with comparatively high viscosity improves further.

From the viewpoint of ensuring that the above-described one or more effects are more reliably exhibited, the napkin 1 preferably has one or more of the following configurations.
The basis weight of the central region 41 is preferably 1.2 times or more than the basis weight of the side region 45, more preferably 1.5 times or more, and preferably 3.5 times or less, more preferably Is 3.0 times or less, preferably 1.2 times or more and 3.5 times or less, more preferably 1.5 times or more and 3.0 times or less. The same applies to the relationship between the basis weight of the thick region 42 and the basis weight of the side region 45.

Further, in the absorbent core 40, the thickness t3 of the high-density region 43 is preferably 80% or less of the thickness t1 of the thick region 42, more preferably 75% or less, and preferably 35% or more. More preferably, it is 40% or more, preferably 35% or more and 80% or less, more preferably 40% or more and 75% or less. The thickness t3 of the high-density region 43 is the thickness of the portion where the compression part 6 is not formed.
In the absorbent core 40, the density of the high density region 43 is preferably 1.2 times or more, more preferably 1.5 times or more, and preferably 3 times that of the thick region 42. 0.5 times or less, more preferably 3.25 times or less, and preferably 1.2 times or more and 3.5 times or less, more preferably 1.5 times or more and 3.25 times or less. On the other hand, as for the absorptive core 40, it is preferable that the basic weight in the high-density area | region 43 is equivalent to the basic weight of the thick area | region 42. FIG. Here, “equivalent” means that the basis weight of the high density region 43 is not less than 80% and not more than 120% of the basis weight of the thick region 42. The basis weight of the high-density region 43 is more preferably 90% or more and 110% or less of the basis weight of the thick region 42 from the viewpoint of reducing the uncomfortable feeling of the absorption capacity and wearing.

The density of the side regions 45 may be higher, lower, or the same as the density of the thick regions 42, but the density of the side regions 45 is 20% of the density of the thick regions 42. It is preferably 300% or less and more preferably 30% or more and 200% or less of the density of the thick region 42.
In the absorbent core 40, the thickness t5 of the side region 45 is preferably 75% or less of the thickness t1 of the thick region 42, more preferably 70% or less, and preferably 30% or more. More preferably, it is 35% or more, preferably 30% or more and 75% or less, and more preferably 35% or more and 70% or less.
Further, the thickness t1 of the thick region 42 is preferably 1.5 mm or more, more preferably 2.0 mm or more, preferably 8.5 mm or less, more preferably 8.0 mm or less, and preferably 1 It is 0.5 mm or more and 8.5 mm or less, More preferably, it is 2.0 mm or more and 8.0 mm or less.

The area ratio of the compressed portion 6 formed in the high-density region 43 is preferably 6% or more, more preferably 8% or more, and preferably 25% or less, more preferably 20% or less. It is preferably 6% to 25%, more preferably 8% to 20%.
The area ratio of the compression portion 6 formed in the high-density region 43 is a ratio of the total area of the compression portion to the area of the surface of the high-density region 43 on the skin facing surface side. A measurement piece having a length of 50 mm in the longitudinal direction X and a length of 7.5 mm in the width direction Y of the article was cut out, and the total area of the compression portions existing on the skin facing surface side of the measurement piece The value divided by the total area of the surface facing the skin is shown as a percentage.

The area ratio of the compressed portion 6 formed in the side region 45 is preferably 6% or more, more preferably 8% or more, and preferably 25% or less, more preferably 20% or less. It is preferably 6% to 25%, more preferably 8% to 20%.
The area ratio of the compression part 6 formed in the side region 45 is a ratio of the total area of the compression part to the area of the side region 45 on the skin facing surface side. A measurement piece having a length of 30 mm in the longitudinal direction X and a length of 30 mm in the width direction Y of the article is cut out, and the total area of the compressed portions present on the skin-facing surface side of the measurement piece is determined to face the skin of the measurement piece. The value divided by the total area of the surface side surface is shown as 100 percent.

The thickness t6 of the portion where the compressed portion 6 of the high-density region 43 is formed is preferably 90% or less of the thickness t3 of the high-density region 43, that is, the thickness t3 of the portion where the compressed portion 6 is not formed. More preferably, it is 85% or less, preferably 35% or more, more preferably 40% or more, and preferably 35% or more and 90% or less, more preferably 40% or more and 85% or less.
The thickness of the side region 45 where the compressed portion 6 is formed is 80% or less of the thickness of the side region 45, that is, the thickness of the side region 45 where the compressed portion 6 is not formed. More preferably, it is 75% or less, preferably 10% or more, more preferably 20% or more, and preferably 10% or more and 80% or less, more preferably 20% or more and 75% or less.

The thickness of each part of the absorbent core 40 is determined by cutting the absorbent core 40 or the absorbent body 14 including the absorbent core 40 along the width direction of the absorbent core 40 using a razor blade, and cutting the absorbed core. The cross section of the conductive core 40 is subjected to a load of 0.5 gf / cm ² , for example, a microscope (
The measurement is performed with a magnification of 20 to 100 times using a VHX-1000 manufactured by KEYENCE Corporation.
The thickness of each part of the absorbent core 40 and the width of each part to be described later are the central position (in FIG. 3 and FIG. 4, IIa) that divides the length along the longitudinal direction X of the absorbent core 40 in the thick region 42 into two equal parts. In the case where there are lateral grooves 51 and 56 described later at the center position, the measurement is performed at a position where there is no lateral groove shifted forward and backward. The density of each part is calculated from the basis weight of the measurement piece cut out to include the thickness obtained by observing the cross section of the absorbent core 40 and the entire thickness direction of the absorbent core. When there are the lateral grooves 51 and the lateral grooves 56 formed by reducing the material for forming the absorbent core, the measurement piece is cut out so as not to include them.

  The width W1 of the central region 41 (see FIG. 2A) is preferably 20% or more, more preferably 30% or more, and preferably 95% or less, with respect to the total width W of the absorbent core 40. More preferably, it is 90% or less, preferably 20% or more and 95% or less, more preferably 30% or more and 90% or less.

  The width W2 of the thick region 42 and the protrusion 44 (see FIG. 2A) is preferably 10% or more, more preferably 15% or more, respectively, with respect to the width W1 of the central region 41. Preferably it is 80% or less, More preferably, it is 75% or less, Preferably it is 10% or more and 80% or less, More preferably, it is 15% or more and 75% or less. The width W2 of the thick region 42 or the protrusion 44 [see FIG. 2 (a)] is preferably 10 mm or more, more preferably 15 mm or more, and preferably 60 mm or less, more preferably 50 mm or less. Moreover, it is preferably 10 mm or more and 60 mm or less, more preferably 15 mm or more and 50 mm or less.

  The width W3 of the high-density region 43 (see FIG. 2A) is preferably 2.5% or more, more preferably 5.0% or more, and preferably the ratio of the central region 41 to the width W1. It is 35% or less, more preferably 30% or less, preferably 2.5% or more and 35% or less, more preferably 5.0% or more and 30% or less. The width W3 [see FIG. 2 (a)] of the high-density region 43 is preferably 2 mm or more, more preferably 5 mm or more, preferably 20 mm or less, more preferably 15 mm or less, and preferably 2 mm. It is 20 mm or less, and more preferably 5 mm or more and 15 mm or less. Within this range, it is easy to achieve both a sufficient amount of absorption in the high-density region 43 and a good wearing feeling of the absorbent article.

  As shown in FIG. 4, the absorbent core 40 in the present embodiment has a longitudinal groove 50 extending along the longitudinal direction X of the absorbent core 40 and the absorbent core 40 on the non-skin facing surface side in the thick region 42. The lateral groove 51 extending along the width direction Y is formed, and the longitudinal groove 55 and the absorbent core extending along the longitudinal direction X of the absorbent core 40 are also formed on the non-skin facing surface side in each side region 45. A transverse groove 56 extending along the width direction Y of 40 is formed.

  As shown in FIG. 2, the vertical groove 50 and the horizontal groove 51 of the thick region 42 are formed in the thick region 42 with a high basis weight portion 52 and an absorbent core having a relatively large basis weight of the absorbent core forming material. It is formed by forming a low basis weight portion 53 having a relatively small basis weight, and the longitudinal groove 50 and the lateral groove 51 are respectively formed on the low basis weight portion 53. The high basis weight portion 52 and the low basis weight portion 53 of the thick wall region 42 may have the density of the high basis weight portion 52 lower than or the same as the density of the low basis weight portion 53. The density of the basis weight part 52 is preferably higher than the density of the low basis weight part 53.

  As shown in FIG. 2, the vertical groove 55 and the horizontal groove 56 in the side region 45 are formed in the side region 45 with the high basis weight portion 57 and the absorbent core having a relatively large basis weight of the absorbent core forming material. It is formed by forming a low basis weight portion 58 having a relatively small basis weight, and the longitudinal groove 55 and the lateral groove 56 are respectively formed on the low basis weight portion 58. The high basis weight portion 57 and the low basis weight portion 58 of the side region 45 may have the density of the high basis weight portion 57 lower than or the same as that of the low basis weight portion 58. The density of the basis weight portion 57 is preferably higher than the density of the low basis weight portion 58.

If the longitudinal grooves 50 and 55 extending along the longitudinal direction X of the absorbent core 40 are formed on the non-skin facing surface Q side in the thick region 42 and the side region 45, the curving may be hindered when the napkin is worn. Therefore, there is an advantage that it is easy to follow the wearer's body shape.
Moreover, when the lateral groove | channels 51 and 56 extended along the width direction Y of the absorptive core 40 are formed in the non-skin opposing surface Q side in the thick area | region 42 and the side area | region 45, according to a wearer's movement. Since it is excellent in deformability, there are advantages such that wrinkles are less likely to occur and it is difficult to give an uncomfortable feeling.
Furthermore, when the longitudinal grooves 50 and 55 or the lateral grooves 51 and 56 are formed in the absorbent core 40, the liquid excreted in the groove space can be quickly taken into the absorbent core 40, and thus a highly viscous liquid. Even so, it can be absorbed more quickly. Furthermore, since the taken-in liquid is likely to diffuse through the groove, the central portion of the absorbent core is less likely to accumulate, and the liquid is less likely to remain on the topsheet 11 even if it is a highly viscous liquid. Rise.

  The absorptive core 40 of the napkin 1 described above includes, for example, a stacking drum 64 that includes an accumulation recess 65 on the outer peripheral surface and rotates in one direction R, and an absorbent core forming material on the outer peripheral surface of the stacking drum 64. After manufacturing the fiber stack 40A described above using the fiber stacking device 63 (see FIG. 6) provided with a duct 69 that supplies the powder in a scattered state, the press working shown in FIG. 7 (b) and FIG. It can manufacture by giving the embossing shown to (c). The example shown in FIGS. 7A to 7C will be described more specifically. A stacked fiber body 40A having a wide and thick region 41 ′ at the center portion in the width direction CD orthogonal to the transport direction MD, As shown in FIGS. 7 (a) and 7 (b), by introducing between a press roll 71 having a recess 72 in a part of the peripheral surface and a flat roll 73 having a smooth peripheral surface, the width is increased. After the side portion 43 ′ of the meat region 41 ′ is strongly pressed to form the fiber stack 40A having the high density region 43, the fiber stack 40A is embossed as shown in FIG. Are introduced between an embossing roll 74 having a convex portion 75 for embossing and an anvil roll 76 having a concave portion 77 on a part of the peripheral surface, thereby allowing the high-density region 43 and the side of the stacked fiber body 40A to be introduced. In the side area 45, a number of compression sections 6 are placed on the putter shown in FIG. In form.

The embossing for forming the compression part 6 may be embossing that only pressurizes the workpiece without heating the embossing roll and the anvil roll, or one or both of the embossing roll and the anvil roll. The embossing which heats and heats and pressurizes may be sufficient.
Similarly, the press work for forming the high-density region 43 may be a press work that only pressurizes the workpiece without heating the press roll and the flat roll, or the press roll and the flat roll. It is also possible to perform press working in which one or both of them are heated and pressed.
7 (b) and 7 (c) show a case where the portion that becomes the thick region 42 that forms the protrusion 44 is not pressurized, but the portion and the side that become the thick region 42 are shown. Either or both of the portions that become the side regions 45 may be compressed and compressed more weakly than the side portions 43 ′ that become the high-density regions 43.

A plurality of stacking recesses 65 in the fiber stacking device 63 shown in FIG. 6 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the fiber stacking drum 64. The bottom surface 66 of the accumulation recess 65 is made of a mesh plate or the like and has a large number of pores functioning as suction holes.
As shown in FIG. 9A, a recess 66a for forming a wide and thick region 41 ′ is formed in a part of the bottom surface 66 of the recess 65 for accumulation. On the bottom of the accumulation recess 65, air-impermeable members 67 and 68 for forming low basis weight portions such as the low basis weight portions 53 and 58 are disposed. The non-breathable members 67 and 68 are fixed so as to protrude from the bottom surface of the accumulation recess 65, and may be non-breathable members, for example, made of metal or plastic.
FIG. 9B shows the absorbent core forming material 40 ′ supplied into the duct while sucking from the bottom surface of the accumulation recess 65, as in the known fiber stacking device including the fiber drum. As described above, the absorbent core forming material 40 ′ is deposited in a predetermined shape in the accumulation recess 65. The stacked body 40A is obtained by releasing the deposit 4 ′ from the accumulation recess 65. As shown in FIG. 9 (b), the portion made of the core forming material deposited on the non-breathable members 67, 68 becomes the low basis weight portion 53, etc., and is deposited on the bottom surface that does not have the nonbreathable members 67, 68. The part which became the high basic weight part 52 grade | etc., Becomes. The coated body 40A is subjected to pressing as shown in FIG. 7B and embossing as shown in FIG. 7C before or after coating with the core wrap sheet.

  In the above-described embodiment, the manufacturing process in which FIGS. 7B and 7C are performed in this order is shown. However, the process of forming the high-density region 43 and the process of forming the compression unit 6 may be performed simultaneously. Moreover, after forming the compression part 6, you may perform the process of forming the high-density area | region 43. FIG.

As the absorbent body 14, various kinds of conventionally used absorbent bodies for absorbent articles can be used without particular limitation, but like the absorbent body 14 of the napkin 1 described above, the absorbent core 40, What is comprised from the core wrap sheet | seat 14c which wraps this absorptive core is preferable.
The absorbent core 40 and the stacked fiber body 40A used for manufacturing the absorbent core 40 may be, for example, a stacked fiber body of liquid absorbent fibers such as pulp fibers, or a mixed fiber body of the liquid absorbent fibers and the water absorbent polymer. It may be. Examples of the liquid-absorbing fibers constituting the absorbent core include cellulose-based hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate. These fibers can be used alone or in combination of two or more. In addition to cellulose-based hydrophilic fibers, polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide may be included. Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid. Each of the fibers and the water-absorbing polymer can be used alone or in combination of two or more.

  The entire or part of the absorbent core 40 is preferably pulp fibers, and the ratio of the pulp fibers to the total fibers contained in the absorbent core 40 is preferably 50 to 100% by mass, more preferably 80 to It is 100 mass%, More preferably, it is 100 mass%. In addition to the superabsorbent polymer, the absorbent core may contain a deodorant or an antibacterial agent as necessary. Moreover, the absorber 14 may consist only of the absorbent core 40.

As the core wrap sheet, a water-permeable fiber sheet such as tissue paper or nonwoven fabric is preferably used. The core wrap sheet may wrap the entire absorbent core with one sheet, or may wrap the entire absorbent core with two or more core wrap sheets. For example, the skin of the absorbent core The facing surface side and the non-skin facing surface side may be covered with separate sheets.
When the absorbent body 14 is composed of the absorbent core 40 and the core wrap sheet 14c that wraps the absorbent core, the compression unit 6 described above may be provided only in the absorbent core, The sheet and the absorbent core are preferably provided integrally.

  As the surface sheet 11, the side sheet 12, and the non-skin side sheet 13, those similar to those conventionally used in the technical field can be used without particular limitation. For example, as the surface sheet 11, a liquid permeable nonwoven fabric or a perforated film can be used. As the side sheet 12, a water-repellent nonwoven fabric having a high water pressure resistance, such as a spunbond-meltblown-spunbond laminated nonwoven fabric, or the like can be used. As the non-skin-side sheet 13, a water-repellent nonwoven fabric having high water pressure resistance such as a liquid-impermeable film made of a synthetic resin or a spunbond-meltblown-spunbond laminated nonwoven fabric can be used.

  Next, a napkin 1A as a second embodiment will be described. In addition, about the napkin 1A of 2nd Embodiment, only a different part from the napkin 1 of embodiment mentioned above is demonstrated, and the same code | symbol is attached | subjected about others, and description is abbreviate | omitted. For the points that are not particularly described, the description of the napkin 1 described above is appropriately applied.

  As for the napkin 1A of 2nd Embodiment, as shown in FIG. 10, regarding the absorptive core 40, the compression part 6A which is a local high-density part was depressed toward the skin opposing surface side from the non-skin opposing surface side. The shape is different from the napkin 1 described above. In the napkin 1A, the compressed portion 6A that is a local high-density portion is formed so as to have an opening on the surface on the non-skin facing surface P side of the absorbent core 40. It is common in that the density is higher than that of the portion located around the compression portion 6A and the density of the high-density region 43A is increased. The napkin 1A of the second embodiment is similar to the napkin 1 described above. An effect is produced.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.
For example, the compression unit 6 may be formed only in the high density region 43 and may not be formed in the side region 45. Further, in the absorbent core 40 shown in FIG. 3, a rectangular region 6N in which the compression portion 6 is not formed is formed in the central portion in the width direction Y, and the region 6N is a part of the front portion A. The region 6N in which the compression portion 6 is not formed may extend over the entire length in the longitudinal direction X of the absorbent core 40 from the rear portion to the rear portion. The thick region 42 may have a protruding portion that protrudes toward the skin facing surface.

  In addition to the sanitary napkin, the absorbent article of the present invention may be other absorbent articles such as panty liners (origami sheets), incontinence pads, and disposable diapers.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples.
[Example 1]
[Manufacture of absorber]
Using the fiber stacking apparatus shown in FIG. 6, pulp fiber and water-absorbing polymer were scattered and supplied to the fiber stacking drum to produce a mixed fiber body 40A having a wide and thick wall region 41 ′. Next, after this was coated with a core wrap sheet made of absorbent paper having a basis weight of 16 g / m ² , press working as shown in FIG. 7B and embossing as shown in FIG. It performed and obtained the absorber 14 of the shape shown in FIG. The absorbent core of the absorbent body 14, the portion disposed in the excretion portion facing section, the central region 41 and lateral region 45 having a basis weight of 200 g / m ² of basis weight 400 g / m ² is formed, the In the central region 41, a thick region 42 having a width W2 of 20 mm and a pair of high density regions 43 having a width W3 of 10 mm were formed. The width W1 of the central region 41 and the width of each side region 45, which are lengths along the width direction Y of the absorbent core 40, were 40 mm and 27 mm.
On the surface of the high-density region 43 and the side region 45 on the skin facing surface side, the compression part 6 in which the core wrap sheet and the absorbent core are integrally recessed is arranged as shown in FIGS. 3 and 5A. Formed. The dimensions L6, P1, and P2 shown in FIG. 5A were 2.0 mm, 3.5 mm, and 3.5 mm in this order.

[Manufacture of surface sheet]
A card web having a basis weight of 25 g / m ² is manufactured by a card method using a core-sheath fiber conjugate fiber [NBF (SH) (trade name) 2.3 dtex × 51 mm] of Daiwa Boseki Co., Ltd. at 136 ° C. ± 5 The top sheet 11 was created by passing hot air of 0 ° C. for 5 to 10 seconds.

[Manufacture of sanitary napkins]
The absorbent body manufactured as described above was placed between the top sheet 11 manufactured as described above and the non-skin side sheet made of a polyethylene resin film to obtain a sanitary napkin for testing. The surface sheet was fixed on the absorber by applying an adhesive pattern on the absorber in a spiral pattern.

[Comparative Example 1]
A sanitary napkin for test was obtained in the same manner as in Example 1 except that the embossing as shown in FIG.

[Performance evaluation]
About the sanitary napkin of Example 1 and Comparative Example 1, the surface liquid return amount was measured by the following method, and the surface liquid returnability was evaluated. The results are shown in Table 1 below.

〔Measuring method〕
The sanitary napkins of Example 1 and Comparative Example 1 were placed horizontally with the top sheet side facing up, and an acrylic plate with a cylinder with a 1 cm diameter injection port was placed on the bottom, and defibrinated horse blood from the injection port 6 g and 9 g were injected, and the state was maintained for 1 minute after the injection. Next, the cylinder-attached acrylic plate was removed, and 16 sheets of absorbent paper (commercially available tissue paper) having a length of 6 cm × width of 9.5 cm and a basis weight of 13 g / m ² were placed on the surface of the surface sheet. Further, a weight was placed thereon so that the pressure was 4.0 × 10 ² Pa, and pressure was applied for 5 seconds. After pressurization, the absorbent paper was taken out, the weight of the paper before and after pressurization was measured, and the mass of defibrinated horse blood absorbed by the paper was measured to obtain the surface liquid return amount.
As defibrinated horse blood, the following low-viscosity liquid and high-viscosity liquid whose viscosity was adjusted using defibrinated horse blood (manufactured by Nippon Biotest Laboratories, Inc.) were used. The low viscosity liquid assumed menstrual blood of normal viscosity, and the high viscosity liquid assumed high menstrual blood seen in the first half of menstruation.
Low viscosity liquid: 8cP viscosity
High viscosity liquid: 25cP viscosity

  According to the results in Table 1, when a low-viscosity liquid was used as defibrinated horse blood, the sanitary napkin of Example 1 had a low surface liquid return amount as well as the sanitary napkin of Comparative Example 1, and was excellent. The liquid return prevention property to the skin was shown. Further, when a high-viscosity liquid is used as defibrinated horse blood, the sanitary napkin of Example 1 has a significantly lower surface liquid return amount than the sanitary napkin of Comparative Example 1, and thus the absorbent article of the present invention. According to this, it is understood that excellent absorption performance, particularly excellent liquid return prevention property can be obtained even with excretory liquid having a relatively high viscosity.

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 10 Skin side sheet 11 Top sheet 12 Side sheet 13 Non-skin side sheet 14 Absorber 14c Core wrap sheet 40 Absorbent core 41 Central area 42 Thick area 43 High density area 44 Protruding part 40A Stacked fiber body 41 'Wide thick area 6 Compression part (local high density part)
DESCRIPTION OF SYMBOLS 15 Absorbent main body 17 Wing part 18 Back flap part 50 Thick area vertical groove 51 Central area horizontal groove 55 Side area vertical groove 56 Side area horizontal groove

Claims (9)

Absorbency comprising a skin-side sheet forming a skin-facing surface, a non-skin-side sheet forming a non-skin-facing surface, and an absorbent body including an absorbent core, and having a front portion, an excretory portion-facing portion and a rear portion in the longitudinal direction. Goods,
The absorbent core has a pair of lateral regions and a central region located between the pair of lateral regions and having a larger basis weight than the lateral regions in the excretory part facing part. ,
The central region is located between the thick region and each side region, and is thicker and thinner than the thick region. Has a density region,
In the high-density region, local high-density portions that are recessed from the skin facing surface side or the non-skin facing surface side toward the inside in the thickness direction of the absorbent core are spaced apart from each other. A plurality of the absorbent articles, wherein the local high-density portion has a higher density than other portions in the high-density region.   The absorbent article according to claim 1, wherein the local high-density portion is recessed from the skin facing surface side of the absorbent core toward the non-skin facing surface side.   The absorbent article according to claim 1, wherein the local high-density portion is recessed from the non-skin facing surface side of the absorbent core toward the skin facing surface side.   The absorbent article according to any one of claims 1 to 3, wherein the local high-density portion is formed in a dotted shape.   The absorbent article according to any one of claims 1 to 4, wherein the absorbent core is formed by integrally forming the side region and the central region.   The local high-density part which became depressed toward the said non-skin opposing surface side from the said skin opposing surface side also in the said side area | region is formed in multiple numbers with the space | interval between each other. The absorbent article according to any one of the above.   The absorbent article according to any one of claims 1 to 6, wherein the thick region forms a protrusion on a surface of the absorbent core on the non-skin facing surface side.   The longitudinal groove extended along the longitudinal direction of the said absorptive core is formed in the said non-skin opposing surface side in the said thick area and the said side area | region, The any one of Claims 1-7. Absorbent article.   Absorption according to any one of claims 1 to 8, wherein a lateral groove extending along the width direction of the absorbent core is formed on the non-skin facing surface side in the thick region and the side region. Sex goods.

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