JP2023111691A - absorbent article - Google Patents

Abstract

To provide an absorbent article capable of quickly moving humor received by a skin-side sheet to an absorber.SOLUTION: An absorbent article comprises an absorber (30) including an absorbent material containing pulp (31), and a skin-side sheet (10) disposed on the skin side of the absorber. The skin-side sheet includes skin-side fibers (40) containing small-diameter fibers (41) and large-diameter fibers (42) thicker than the small-diameter fibers, disposed thereon. At least the small-diameter fibers are disposed on a skin surface (15) of the skin-side sheet. At least the large-diameter fibers are disposed on a non-skin surface (16) of the skin-side sheet. The pulp extends from the non-skin-side surface of the skin-side sheet across the skin-side fibers to the inside of the skin-side sheet.SELECTED DRAWING: Figure 3

Description

The present invention relates to absorbent articles such as panty liners, sanitary napkins, and light incontinence pads.

Patent Literature 1 discloses an absorbent article configured to quickly transfer body fluid received by a liquid-permeable surface sheet to an absorbent body. The topsheet of the absorbent article of Patent Document 1 has a plurality of openings penetrating through the topsheet, and protrusions protruding from the periphery of each of the plurality of openings toward the absorbent body, and the tips of the protrusions contacting the absorbent body. have.

JP 2021-101926 A

According to the absorbent article of Patent Literature 1, body fluid can be easily transferred from the openings of the topsheet to the absorbent body through the protrusions. However, in the absorbent article of Patent Document 1, it is difficult for body fluids to be transferred to the absorbent body until they reach the protrusions located on the non-skin surface of the topsheet, and an effect of further promoting the transfer of body fluids is required. ing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article capable of quickly transferring bodily fluids received by a skin-side sheet to an absorbent body.

An absorbent article according to one aspect has an absorbent body (30) having an absorbent material containing pulp (31), and a skin-side sheet (10) arranged closer to the skin than the absorbent body. The skin-side sheet includes skin-side fibers (40) including small-diameter fibers (41) and large-diameter fibers (42) that are thicker than the small-diameter fibers. At least the small-diameter fibers are arranged on the skin surface (15) of the skin-side sheet. At least the large-diameter fibers are arranged on the non-skin surface (16) of the skin-side sheet. The pulp extends from the non-skin surface (16) of the skin-side sheet across the skin-side fibers into the skin-side sheet.

An absorbent article according to another aspect has an absorbent body (30) having an absorbent material containing pulp (31), and a skin-side sheet (10) arranged closer to the skin than the absorbent body. The skin-side sheet has an apertured film forming the skin surface of the skin-side sheet. The pulp extends into the apertures of the apertured film.

FIG. 1 is a plan view of the absorbent article according to the first embodiment viewed from the skin side. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. FIG. 3 is a schematic enlarged view of the B portion shown in FIG. FIG. 4 is a diagram for explaining the manufacturing method of the absorbent article. FIG. 5 is a cross-sectional view of the absorbent article according to the second embodiment with reference to the schematic enlarged view of FIG.

(1) Overview of Embodiments At least the following matters will become clear from the description of this specification and the accompanying drawings.
An absorbent article according to one aspect has an absorbent body (30) having an absorbent material containing pulp (31), and a skin-side sheet (10) arranged closer to the skin than the absorbent body. The skin-side sheet includes skin-side fibers (40) including small-diameter fibers (41) and large-diameter fibers (42) that are thicker than the small-diameter fibers. At least the small-diameter fibers are arranged on the skin surface (15) of the skin-side sheet. At least the large-diameter fibers are arranged on the non-skin surface (16) of the skin-side sheet. The pulp extends from the non-skin surface (16) of the skin-side sheet across the skin-side fibers into the skin-side sheet. According to this aspect, since the pulp extends into the skin-side sheet and straddles the skin-side fibers, body fluids in the skin-side sheet can be positively transferred to the absorbent body. At least large-diameter fibers are arranged on the non-skin surface of the skin-side sheet, and voids are likely to be formed between the fibers. By arranging the pulp in the gaps between the large-diameter fibers, body fluids in the skin-side sheet can be positively transferred to the absorbent body. Therefore, the present invention provides an absorbent article capable of promoting transfer of bodily fluids from the skin-side sheet to the absorbent body and allowing the body fluids received by the skin-side sheet to be quickly transferred to the absorbent body.

According to a preferred aspect, the skin-side sheet includes a skin-side region located closer to the skin than the center of the skin-side sheet in the thickness direction, and a skin-side region located closer to the skin than the center of the skin-side sheet in the thickness direction. and a non-skin side region that The density of the skin-side fibers in the skin-side region is higher than the density of the skin-side fibers in the non-skin-side region. According to this aspect, since the density of the skin-side fibers in the skin-side region is relatively high, the pulp extending to the skin-side sheet is prevented from coming out to the skin side of the skin-side sheet, and the skin-side sheet absorbs bodily fluids. can suppress the stickiness of the skin surface. In addition, even if the density of the skin-side sheet is higher on the skin side and the drawing property to the non-skin side cannot be improved due to the density gradient, the pulp in the skin-side sheet positively draws body fluids to the non-skin side. It can guide and improve the withdrawal of bodily fluids.

According to a preferred aspect, the skin-side sheet has a top sheet forming a skin surface of the skin-side sheet. The topsheet comprises a first layer having the small diameter fibers and a second layer having the large diameter fibers. The pulp extends into the second layer. According to this aspect, by arranging the small-diameter fibers on the skin surface of the skin-side sheet, the texture of the skin-side sheet on the skin surface can be improved. In addition, large-diameter fibers can be arranged on the non-skin surface of the skin-side sheet, and pulp can be arranged on the non-skin-side region of the skin-side sheet. Therefore, it is possible to improve the drawability of bodily fluids in the skin-side sheet and improve the transferability of bodily fluids to the absorbent body.

According to a preferred aspect, the skin-side sheet has a top sheet forming the skin surface of the skin-side sheet and a second sheet located on the non-skin side of the top sheet. The topsheet has small diameter fibers and the secondsheet has large diameter fibers. The pulp has reached the skin surface of the second sheet. According to this aspect, by arranging the small-diameter fibers on the skin surface of the skin-side sheet, the texture of the skin-side sheet on the skin surface can be improved. In addition, by arranging the pulp on the second sheet positioned on the non-skin side of the skin-side sheet, it is possible to improve the drawability of bodily fluids in the skin-side sheet and improve the migration of bodily fluids to the absorber. Moreover, since the pulp has reached the skin surface of the second sheet, the pulp partially contacts the top sheet as well. Therefore, the pulp can positively lead the bodily fluids on the top sheet side to the absorbent body side.

According to a preferred embodiment, the average inter-fiber distance of the second sheet is greater than the average inter-fiber distance of the top sheet. According to this aspect, since the average inter-fiber distance of the second sheet is relatively large, the amount of pulp arranged between the fibers of the second sheet can be ensured, and the transfer of bodily fluids to the non-skin side can be further promoted.

According to a preferred aspect, the absorbent article has a first direction along the orientation direction of the skin-side fibers on the skin surface of the skin-side sheet and a second direction perpendicular to the first direction. A ratio of the tensile strength of the skin-side sheet in the first direction to the tensile strength of the skin-side sheet in the second direction is 6 or more. The tensile strength of the skin-side sheet in the first direction is 1.0N or more and 2.5N or less. According to this aspect, the ratio of the tensile strength of the skin-side sheet in the first direction to the tensile strength of the skin-side sheet in the second direction is high, and the skin-side fibers are along the first direction on the skin surface of the skin-side sheet. is high. Therefore, it is difficult for the pulp to reach the gaps between the skin-side fibers on the skin surface of the skin-side sheet, and discomfort due to body fluid held by the pulp coming into contact with the skin can be suppressed. In addition, the tensile strength of the skin side sheet in the first direction is 1.0 N or more and 2.5 N or less, the tensile strength of the skin side sheet in the first direction is high, and the skin surface of the skin side sheet is twisted in the first direction. hard. Therefore, it is difficult for the pulp to reach the gaps between the skin-side fibers on the skin surface of the skin-side sheet, and discomfort due to body fluid held by the pulp coming into contact with the skin can be suppressed.

According to a preferred aspect, the absorbent article has a first direction along the orientation direction of the skin-side fibers on the skin surface of the skin-side sheet and a second direction perpendicular to the first direction. The density of the pulp extending into the skin-side sheet at the end of the absorbent body in the first direction is the density of the pulp extending into the skin-side sheet at the end of the absorbent body in the second direction. higher than According to this aspect, the bodily fluid discharged to the skin side sheet is led to the non-skin side while diffusing along the first direction, which is the orientation direction of the skin side fibers. At this time, since the density of the pulp extending into the skin-side sheet at the ends in the first direction is high, body fluids diffused in the first direction can be efficiently drawn into the absorbent body.

An absorbent article according to another aspect has an absorbent body having an absorbent material containing pulp, and a skin-side sheet arranged closer to the skin than the absorbent body. The skin-side sheet has an apertured film forming the skin surface of the skin-side sheet. The pulp extends into the apertures of the apertured film. According to this aspect, the pulp extends in the perforated film, and body fluids in the skin-side sheet can be positively transferred to the absorbent body via the pulp. Therefore, it is possible to suppress a decrease in bodily fluid drawing-in property and to quickly transfer the bodily fluid received by the skin-side sheet to the absorbent body.

According to a preferred aspect, the pulp is arranged only in the non-skin-side region located on the non-skin side of the center of the skin-side sheet in the thickness direction. According to this aspect, the pulp is not arranged in the skin surface area of the skin side sheet, and body fluid is less likely to be retained. Therefore, it is possible to suppress rewetting of the body fluid and stickiness of the skin side sheet to the skin due to the retention of the body fluid in the skin side region.

According to a preferred aspect, the absorbent body has an absorbent core laminated with the absorbent material. No core wrap is arranged between the absorbent core and the skin-side sheet, and the non-skin surface of the absorbent core is in contact with the skin-side sheet. According to this aspect, since there is no core wrap between the skin-side sheet and the absorbent core, it becomes easier for the pulp to directly reach the skin-side sheet, and the transfer to the absorbent body side can be further promoted. In addition, since there is no core wrap between the skin-side sheet and the absorbent core, when the body fluid moves from the skin-side sheet to the absorbent core, the core wrap diffuses it in the planar direction. It can promote the migration to the side of the body.

According to a preferred aspect, the absorbent body has an absorbent core laminated with the absorbent material and a core wrap made of nonwoven fabric. The pulp of the absorbent core penetrates the core wrap and extends into the skin side sheet. According to this aspect, since the pulp extends into the skin-side sheet through the core wrap, transfer of bodily fluids from the skin-side sheet to the absorbent body can be promoted via the pulp. In addition, since the body fluid can be diffused in the planar direction and guided to the non-skin side via the core wrap, even when the body fluid is locally concentrated, the movement of the body fluid to the non-skin side can be promoted.

According to a preferred aspect, when the body fluid is dropped for the second time after dropping the body fluid for the first time on each of the skin surface and the non-skin surface of the skin-side sheet, in the second dropping, the skin-side sheet The absorption rate of the non-skin side sheet is faster than the absorption rate of the skin side sheet. According to this aspect, when bodily fluids are absorbed a plurality of times, the absorption speed of the non-skin surface of the skin-side sheet is faster than the absorption speed of the skin-side sheet. Also, it is possible to secure the drawing property of the bodily fluid to the absorbent body side.

According to a preferred aspect, in the first dropping, the absorption rate of the non-skin side of the skin-side sheet is faster than the absorption rate of the skin side of the skin-side sheet, and the skin side in the second dropping. The difference between the absorption speed of the non-skin surface of the sheet and the absorption speed of the skin side sheet is the absorption speed of the non-skin surface of the skin side sheet and the absorption speed of the skin side sheet in the first dropping. Greater than the speed difference. According to this aspect, generally, body fluid is not retained in the absorbent article at the time of the first absorption, it is easy to ensure the absorption speed, and the wearer is less likely to feel discomfort. However, since body fluid is already retained in the absorbent article during the second absorption, it is difficult to secure the absorption rate, and the wearer tends to feel uncomfortable. In the second time, the absorption speed of the non-skin surface of the skin-side sheet is faster than that of the skin-side sheet, and the difference is large.

According to a preferred aspect, in a plan view of the absorbent article, the core arrangement region in which the absorbent body is arranged includes an outer edge region extending inward from the outer edge of the absorbent body and a center located inside the outer edge region. and a region. The density of pulp extending into the skin-side sheet in the central region is higher than the density of pulp extending into the skin-side sheet in the outer edge region. According to this aspect, it is possible to improve the drawability of bodily fluids through the pulp in the central region where bodily fluids are easily discharged.

According to a preferred aspect, the absorbent article is housed in a package before use of the absorbent article without forming a crease for folding in the thickness direction. According to this aspect, it is possible to suppress the gaps between the skin-side fibers from being crushed or biased due to the formation of the folds, and suppress the deformation of the pulp extending into the skin-side sheet.

According to a preferred aspect, the average angle between the pulp extending in the skin-side sheet and the thickness direction of the skin-side sheet is an acute angle. According to this aspect, since the pulp in the skin-side sheet extends along the thickness direction rather than the planar direction, the effect of drawing in the body fluid to the non-skin side is more than the effect of diffusing the body fluid in the planar direction through the pulp. easy to obtain.

(2) Absorbent Articles According to Embodiments Absorbent articles according to embodiments will be described below with reference to the drawings. The absorbent article may be an absorbent article used inside a wearable article such as a sanitary napkin, pantiliner, adult incontinence pad. The absorbent article according to this embodiment is a panty liner. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, there are cases where portions having different dimensional relationships and ratios are included between the drawings.

FIG. 1 is a plan view of the absorbent article according to the first embodiment, viewed from the skin side T1. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. FIG. 3 is a schematic enlarged view of the B portion shown in FIG. The absorbent article 1 has a front-rear direction L and a width direction W perpendicular to each other. The front-rear direction L is defined by the direction extending to the front side of the body and the rear side of the body. In other words, the front-rear direction L is a direction extending front-rear in the unfolded absorbent article 1 . In addition, the absorbent article 1 has a thickness direction T in which both the front-rear direction L and the width direction W are perpendicular to each other. The thickness direction T extends to a skin side T1 facing the wearer and a non-skin side T2 opposite to the skin side T1.

The absorbent article 1 has a crotch region R3, a front side region R1 and a back side region R2. The crotch region R3 is a region arranged to face the wearer's excretory opening, for example, the vaginal opening. When the absorbent article 1 is attached to the wearing article, the crotch region R3 is arranged at the crotch of the wearing article and is arranged between the legs of the wearer. The front side region R1 is positioned forward of the crotch region R3. A front edge of the front side region R1 defines a front edge of the absorbent article 1 . The rear side region R2 is located behind the crotch region R3. The rear edge of the rear region R2 defines the rear edge of the absorbent article 1. As shown in FIG.

In addition, the outer portion in the present invention is a portion occupying a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. The inner portion in the present invention is a portion occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W. Further, the front end portion and the rear end portion in the present invention are portions occupying a certain range in the front-rear direction L including edges in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer edge includes a leading edge and a trailing edge, and the outer edge includes a leading edge and a trailing edge. In addition, the inner side is a side that includes the inner edge and extends along the front-rear direction L. As shown in FIG. The outer side is a side that includes the outer edge and extends along the front-rear direction L. In this specification, the term "along the front-rear direction L" means a direction having an angle of less than 45° with respect to the front-rear direction L, and the term "along the width direction W" It means a direction with an angle of less than 45° with respect to the width direction W.

The absorbent article 1 has at least a skin-side sheet 10 , a non-skin-side sheet 20 and an absorbent body 30 . Absorbent body 30 has an absorbent material comprising pulp 31 . Absorbent body 30 may have an absorbent material other than pulp 31 (for example, a superabsorbent polymer). Moreover, the absorbent body 30 may be composed only of the absorbent core 33 laminated with absorbent material, or may have a core wrap covering the absorbent core 33 . Absorbent body 30 of the present embodiment is composed only of absorbent core 33 and does not have a core wrap (not shown). Therefore, the surface of the absorbent core located on the skin side T1 is entirely along the non-skin surface 16 of the non-skin side T2 of the skin-side sheet 10, and is configured to be able to contact the non-skin surface 16. there is

The skin-side sheet 10 is arranged closer to the skin side T1 than the absorbent body 30 is. The skin-side sheet 10 may be made of nonwoven fabric, for example. The skin-side sheet 10 constitutes the skin surface of the absorbent article 1 and may have a top sheet 13 in contact with the wearer's skin. The skin-side sheet 10 has a skin surface 15 located on the skin side T1 and a non-skin surface 16 located on the non-skin side T2. The skin surface 15 of the skin-side sheet 10 forms the skin surface of the absorbent article, and the non-skin surface 16 of the skin-side sheet 10 faces the skin surface 35 of the absorbent body 30 on the skin side T1. The skin surface 15 of the skin-side sheet 10 may be coated with an oil containing unsaturated fatty acid (for example, triglyceride). Unsaturated fatty acids can be imparted to the skin, the texture can be improved, and the skin can be protected.

The skin-side sheet 10 may be composed of only the top sheet 13 or may have a second sheet arranged between the top sheet 13 and the absorbent body 30 . The skin-side sheet 10 of the present embodiment is composed only of the top sheet 13 . In the form in which the skin-side sheet 10 is composed only of the top sheet 13, the skin-side sheet 15 of the skin-side sheet 10 is the skin surface of the top sheet 13, and the non-skin-side sheet 16 of the skin-side sheet 10 is the top sheet. This is the non-skin surface of the sheet 13 . In addition, in the form in which the skin side sheet 10 is composed of the top sheet 13 and the second sheet, the skin side 15 of the skin side sheet 10 is the skin side of the top sheet 13 and the non-skin side of the skin side sheet 10. 16 is the non-skin surface of the second seat. The configuration of the skin-side sheet 10 will be described in detail later.

The non-skin-side sheet 20 is arranged on the non-skin side T<b>2 of the absorbent body 30 . The non-skin-side sheet 20 may be composed of, for example, a liquid-impermeable sheet such as a plastic film. The non-skin side sheet 20 may have air permeability. The breathable non-skin-side sheet 20 facilitates the discharge of moisture through the non-skin-side sheet 20 when urine or sweat is absorbed. Therefore, stuffiness can be reduced and a feeling of wearing can be improved. The skin-side sheet 10 and the non-skin-side sheet 20 reach the outer edge 1E of the absorbent article 1 . The absorbent body 30 is spaced apart from the outer edge 1E of the absorbent article 1 and arranged inside the outer edge 1E of the absorbent article 1 . A fastening portion (not shown) for joining the absorbent article 1 to underwear may be arranged on the non-skin surface of the non-skin side sheet 20 . The fastening part may be covered with a release sheet or a packaging sheet before the absorbent article 1 is used.

The absorbent article 1 may be provided with a sheet pressing portion 45 in which at least the skin-side sheet 10 and the non-skin-side sheet 20 are compressed in the thickness direction T. The sheet pressing unit 45 may also compress the absorbent body 30 . The sheet pressing part 45 may be provided along the outer edge of the absorbent article 1 . Since the sheet pressing portion 45 is provided along the outer edge of the absorbent article 1, spillage of the absorbent material can be suppressed. Moreover, the sheet pressing part 45 is arranged in a wave shape in a plan view, and has a part reaching the outer edge of the absorbent article 1 and a part separated from the outer edge of the absorbent article 1 . Since the sheet pressing part 45 partially reaches the outer edge of the absorbent article, it is possible to prevent the outer edge of the absorbent article from becoming too hard. Moreover, the absorbent article 1 may be provided with an absorbent pressing portion 47 in which at least the skin-side sheet 10 and the absorbent body 30 are compressed in the thickness direction T. As shown in FIG. Only the skin-side sheet 10 and the absorber 30 are compressed in the absorbent compression portion 47 of the present embodiment. However, in a modified example, the non-skin-side sheet 20 may also be compressed in the absorbent compression part 47 .

The absorbent article 1 according to the present embodiment is configured to quickly transfer body fluid received by the skin-side sheet 10 to the absorbent body 30 . Next, a configuration for improving transferability of bodily fluids will be described in detail. The skin-side sheet 10 is provided with skin-side fibers 40 including small-diameter fibers 41 and large-diameter fibers 42 that are thicker than the small-diameter fibers 41 . In this embodiment, the top sheet 13 constituting the skin side sheet 10 has skin side fibers 40 . In addition, in a form in which the skin-side sheet 10 is composed of a plurality of sheets, at least one sheet should have the skin-side fibers 40 . The skin-side sheet 10 may have materials (such as a binder) other than the skin-side fibers 40 . The skin-side fibers 40 include fibers with different fiber diameters, and may include small-diameter fibers 41 with a relatively small diameter and large-diameter fibers 42 with a relatively large diameter. When comparing the fiber diameter, the value measured at any position of the fiber may be used, and in the case where the fiber diameter changes, the fiber diameter is measured at at least three locations, and the average value is the fiber diameter. may be The fiber diameter of the small-diameter fibers is not limited, but may be, for example, 2.0 dtex or less, preferably 1.3 dtex or less, more preferably 1.0 dtex or less. The fiber diameter of the large-diameter fibers is not limited, but may be, for example, greater than 2.0 dtex, preferably 2.2 dtex or more, and more preferably 2.5 dtex or more. .

At least small-diameter fibers 41 are arranged on the skin surface 15 of the skin-side sheet 10 . The small-diameter fibers 41 are arranged on the skin surface 15 of the skin-side sheet 10, and since the relatively small-diameter fibers are in contact with the skin, the contact with the skin is softened, and the user's touch can be improved. At least the small-diameter fibers 41 may be arranged on the skin surface 15 of the skin-side sheet 10, and the large-diameter fibers 42 may also be arranged. At least large-diameter fibers 42 are arranged on the non-skin surface 16 of the skin-side sheet 10 . At least the large-diameter fibers 42 may be arranged on the non-skin surface 16 of the skin-side sheet 10, and the small-diameter fibers 41 may also be arranged. The pulp 31 of the absorbent body 30 extends from the non-skin surface 16 of the skin-side sheet 10 across the skin-side fibers 40 into the skin-side sheet 10 . In addition, at least the large-diameter fibers 42 are arranged on the non-skin surface 16 of the skin-side sheet 10, and voids are easily formed between the fibers. By arranging the pulp 31 in the gaps between the large-diameter fibers 42, the bodily fluids in the skin-side sheet 10 can be positively transferred to the absorbent body 30 side. Therefore, transfer of body fluid from the skin-side sheet 10 to the absorbent body 30 side can be promoted, and the body fluid received by the skin-side sheet 10 can be quickly transferred to the absorbent body 30 . Here, the pulp 31 extends into the skin side sheet 10 across the skin side fibers 40 from the non-skin surface 16 of the skin side sheet 10, the pulp 31 is in contact with the skin side fibers 40. In addition, the pulp 31 extends beyond at least one skin side fiber 40 to the skin side T1. It is a configuration that extends to the skin side T1. The pulp 31 may be a well-known pulp that is used in absorbent articles, and may be, for example, water-absorbent softwood fibers or water-absorbent hardwood fibers.

As in the above-described prior art, when a plurality of openings passing through the skin-side sheet protrude toward the absorbent body, a gap is formed between the absorbent body and the skin-side sheet due to the existence of the projecting portions. be. Due to the presence of the voids, the adhesion between the skin-side sheet and the absorbent body may be lowered, and the migration of bodily fluids may be lowered. However, in the present embodiment, since the pulp 31 not only protrudes toward the skin-side sheet 10 but also extends into the skin-side sheet 10, the pulp 31 extending toward the skin-side T1 causes the absorber 30 and the skin to move. A gap is less likely to be formed between the side sheets 10, and the adhesion between the skin side sheet 10 and the absorbent body 30 can be maintained. Therefore, transfer of body fluid from the skin-side sheet 10 to the absorbent body 30 side can be promoted, and the body fluid received by the skin-side sheet 10 can be quickly transferred to the absorbent body 30 .

The skin-side sheet 10 has a skin-side region R11 positioned closer to the skin side T1 than the center 10TC in the thickness direction T of the skin-side sheet 10, and a non-skin-side region R11 positioned closer to the non-skin side T2 than the center 10TC in the thickness direction T of the skin-side sheet 10. and a non-skin side region R12. The skin-side region R11 and the non-skin-side region R12 are regions obtained by dividing the entire skin-side sheet 10 into two equal parts in the thickness direction. When the sheet is divided into two equal parts (for example, nonwoven fabric), the thickness is measured at an arbitrary point, and the thickness is divided into two equal parts. On the other hand, in the case of a sheet with a large change in thickness (for example, a sheet subjected to uneven processing), the thickness is measured at the thickest portion, and the thickness is divided into two equal parts. In addition, in the form in which the skin-side sheet 10 is composed only of the top sheet 13, the skin-side sheet 10 is formed by dividing the top sheet 13 into two equal parts in the thickness direction, and the skin-side sheet 10 is composed of a plurality of sheets. If there is, it is an area obtained by dividing a plurality of sheets into two equal parts. The density of the skin-side fibers 40 in the skin-side region R11 may be higher than the density of the skin-side fibers 40 in the non-skin-side region R12. Since the density of the skin-side fibers 40 in the skin-side region R11 is high, the fibers in the skin-side region R11 are densely arranged, and the feel on the skin surface 15 of the skin-side sheet 10 can be improved. In addition, since the density of the skin-side fibers 40 in the skin-side region R11 is relatively high, the pulp 31 extending to the skin-side sheet 10 is suppressed from coming out to the skin surface 15 side of the skin-side sheet 10, and the absorption of body fluids is suppressed. The stickiness of the skin surface 15 of the skin-side sheet 10 can be suppressed. Moreover, even if the fiber density of the skin-side region R11 is high, the pulp 31 in the skin-side sheet 10 positively guides bodily fluids to the non-skin side T2, thereby improving the drawability of the bodily fluids. The density of the skin-side fibers in each region is obtained by observing the cross section of the skin-side sheet 10 with an enlarged observation means (for example, a microscope, a scanning electron microscope, etc.) and comparing the area ratio of the skin-side fibers in each region. can.

The skin-side region R11 may contain a hydrophilic oil, and the non-skin-side region R12 may contain a water-repellent oil. In this embodiment, in the skin-side region R11, the ability to draw bodily fluids into the skin-side sheet 10 can be improved by the hydrophilic oil agent. In addition, in the non-skin-side region R12, the water-repellent oil makes it difficult for body fluids once guided to the absorbent body 30 side to return to the skin-side sheet 10, thereby suppressing rewetting of body fluids.

The pulp 31 may be arranged across the skin-side region R11 and the non-skin-side region R12. According to this aspect, the body fluid in the skin-side region R11 can also be positively guided to the absorbent body 30 side by the pulp 31 . Moreover, in another form, the pulp 31 may not be arranged in the skin-side region R11, and may be arranged only in the non-skin-side region R12. According to this aspect, the pulp 31 is not disposed in the skin-side region R11, and body fluid is less likely to be retained. Therefore, it is possible to suppress the rewet of the body fluid and the stickiness of the skin due to the retention of the body fluid in the skin-side region R11.

The skin-side sheet 10 may have a top sheet 13 forming the skin surface 15 of the skin-side sheet 10 . The topsheet 13 may comprise a first layer 11 having small diameter fibers 41 and a second layer 12 having large diameter fibers 42 . Pulp 31 may extend into second layer 12 . In this embodiment, the small-diameter fibers 41 are arranged on the skin surface 15 of the skin-side sheet 10, and the fiber density of the area of the skin-side T1 of the skin-side sheet 10 can be increased. Therefore, the feel of the skin surface 15 of the skin-side sheet 10 can be improved. In addition, the large-diameter fibers can be arranged on the non-skin surface 16 of the skin-side sheet 10 and the pulp 31 can be arranged on the non-skin-side T2 region of the skin-side sheet 10 . Therefore, it is possible to improve the drawability of bodily fluids in the skin-side sheet 10 and improve the transferability of the bodily fluids to the absorbent body 30 . The first layer 11 may contain at least the small-diameter fibers 41 and may partially contain the large-diameter fibers 42 . Similarly, the second layer 12 may contain at least the large-diameter fibers 42 and may partially contain the small-diameter fibers 41 . Preferably, the average fiber diameter of the first layer 11 may be smaller than the average fiber diameter of the second layer 12 . The pulp 31 may be arranged only in the second layer 12 and may not reach the first layer 11, or may be arranged across the second layer 12 and the first layer 11. . In the form in which the pulp 31 is arranged across the second layer 12 and the first layer 11, body fluids in the skin-side sheet 10 can be more positively led to the non-skin side T2. Alternatively, the top sheet 13 may be composed of a single layer sheet without the first layer 11 and the second layer 12 .

In the modified example, the skin-side sheet 10 includes a top sheet 13 forming the skin surface 15 of the skin-side sheet 10 and a second sheet (not shown) positioned on the non-skin side T2 of the top sheet 13. may have The topsheet 13 may have small diameter fibers 41 and the second sheet may have large diameter fibers 42 . The pulp 31 may reach the skin surface of the second sheet. With this configuration as well, the small-diameter fibers 41 can be arranged on the skin surface 15 of the skin-side sheet 10, and the fiber density of the region of the skin-side T1 of the skin-side sheet 10 can be increased. Therefore, the feel of the skin surface 15 of the skin-side sheet 10 can be improved. Further, the large-diameter fibers 42 can be arranged on the non-skin surface 16 of the skin-side sheet 10, and the pulp 31 can be arranged on the non-skin-side T2 region of the skin-side sheet 10. - 特許庁Therefore, it is possible to improve the drawability of bodily fluids in the skin-side sheet 10 and improve the transferability of the bodily fluids to the absorbent body 30 . In addition, since the pulp 31 reaches the skin surface of the second sheet, the pulp 31 partially contacts the top sheet 13, and the pulp 31 actively guides body fluids on the side of the top sheet 13 to the side of the absorbent body 30. can be done. The top sheet 13 may contain at least the small-diameter fibers 41 and may partially contain the large-diameter fibers 42 . Similarly, the second sheet should contain at least the large-diameter fibers 42 and may partially have the small-diameter fibers 41 . Preferably, the average fiber diameter of the top sheet 13 may be smaller than the average fiber diameter of the second sheet.

In a modified example, the average inter-fiber distance of the second sheet may be larger than the average inter-fiber distance of the top sheet 13 . In this embodiment, since the average inter-fiber distance of the second sheet is relatively large, the amount of pulp 31 arranged between the fibers of the second sheet can be ensured, and the transfer of bodily fluids to the non-skin side T2 can be further promoted. . Here, the average inter-fiber distance can be compared by the following method. Prepare a sample of the skin side fiber of the top sheet 13 and the skin side fiber of the second sheet as a sample, and use the 3D image connection function of the microscope (KEYENCE VHX-2000, lens VH-Z20W aperture open). A magnified image that was in focus from the surface to a depth of 100 μm was obtained, and the outside of the fiber that was in focus was extracted based on the magnified image. Let the surface formed there be a fiber space. The diameter of the maximum inscribed circle of the fiber space was defined as the fiber space distance, and the average value for 100 fiber spaces was defined as the average interfiber distance.

The absorbent article 1 may have a first direction D1 along the orientation direction of the skin-side fibers 40 on the skin surface 15 of the skin-side sheet 10 and a second direction D2 orthogonal to the first direction D1. The orientation direction of the skin-side fibers is the direction corresponding to the transport direction (so-called MD direction) when manufacturing the nonwoven fabric, and the orientation of the constituent fibers of the nonwoven fabric is observed by an enlarged observation means (for example, a microscope or a scanning electron microscope). etc.) can be used for magnified observation. In this embodiment, the first direction D1 is the width direction W, and the second direction D2 is the front-rear direction L. As shown in FIG. A ratio of the tensile strength in the first direction D1 of the skin-side sheet 10 to the tensile strength in the second direction D2 of the skin-side sheet 10 may be 6 or more. The ratio of the tensile strength of the skin side sheet 10 in the first direction to the tensile strength of the skin side sheet 10 in the second direction is high, and the skin side fibers along the first direction on the skin surface 15 of the skin side sheet 10 are high. . Therefore, it is difficult for the pulp 31 to reach the gaps between the skin-side fibers on the skin surface 15 of the skin-side sheet 10, and the discomfort caused by the bodily fluid held by the pulp 31 coming into contact with the skin can be suppressed. Moreover, the tensile strength of the skin-side sheet 10 in the first direction D1 may be 1.0 N or more and 2.5 N or less. The tensile strength of the skin-side sheet 10 in the first direction is high, and the skin surface 15 of the skin-side sheet 10 is less likely to bend in the first direction. Therefore, it is difficult for the pulp 31 to reach the gaps between the skin-side fibers on the skin surface 15 of the skin-side sheet 10, and the discomfort caused by the bodily fluid held by the pulp 31 coming into contact with the skin can be suppressed.

Here, the tensile strength of the skin-side sheet 10 can be measured by the following method. (1) Prepare a tensile tester and set the distance between chucks to 40 mm and the chuck tension speed to 100 mm/min. (2) A sample is cut into 100 mm x 25 mm (longitudinal direction x lateral direction). (3) One end of the sample in the longitudinal direction is set in the upper chuck of the tensile tester so that a depth of about 10 mm is sandwiched between the chucks. (4) Similarly, the other longitudinal end of the sample is set in the lower chuck of the tensile tester so that a depth of about 10 mm is sandwiched between the chucks. (5) Start the tensile test at a chuck tensile speed of 100 mm/min, and continue the tensile test until the sample breaks. (6) Record the maximum tensile strength during a displacement of 150 mm. (7) The above operation is repeated four more times, and the average value of the maximum values of the tensile strength of a total of five times is calculated. Examples of the tensile tester include an autograph type tensile tester model AG-1KNI manufactured by Shimadzu Corporation.

The density of the pulp 31 extending into the skin-side sheet 10 at the end of the absorbent body 30 in the first direction D1 is the density of the pulp 31 extending into the skin-side sheet 10 at the end of the absorbent body 30 in the second direction D2. may be higher than the density of The edge of the absorbent body 30 can be set at a constant distance from the edge of the absorbent body 30. For example, the edge of the absorbent body 30 in the first direction D1 is set at a constant distance from the edge of the absorbent body 30 in the first direction D1. The end portion of the absorbent body 30 in the second direction D2 can be set to the part extending 10 mm inward from the edge of the absorbent body 30 in the second direction D2. Also, the density of the pulp 31 can be compared by punching out the pulp with a cutter of 10 mm×10 mm, measuring the thickness and weight of the punched sample, and comparing the density. In this embodiment, the body fluid discharged to the skin-side sheet 10 is guided to the non-skin side T2 while diffusing along the first direction, which is the orientation direction of the skin-side fibers. At this time, since the density of the pulp 31 extending into the skin-side sheet 10 at the end in the first direction is high, body fluids diffused in the first direction can be efficiently drawn into the absorbent body 30 side.

A core wrap may not be arranged between the absorbent core 33 and the skin-side sheet 10 , and the non-skin surface of the absorbent core 33 may be in contact with the skin-side sheet 10 . According to this aspect, since there is no core wrap between the skin-side sheet 10 and the absorbent core, the pulp 31 can easily reach the skin-side sheet 10 directly, and the transfer to the absorbent body 30 side can be promoted. In addition, since there is no core wrap between the side sheet and the absorbent core, when body fluid moves from the skin-side sheet 10 to the absorbent core, the body fluid is diffused in the plane direction by the core wrap, and there is no retention or retention by the core wrap. The migration to the body 30 side can be promoted more.

In a modification, the absorbent body 30 may have an absorbent core 33 and a core wrap made of nonwoven fabric. The pulp 31 of the absorbent core 33 may penetrate the core wrap and extend into the skin side sheet 10 . According to this aspect, since the pulp 31 extends into the skin-side sheet 10 through the core wrap, transfer of bodily fluids from the skin-side sheet 10 to the absorbent body 30 side via the pulp 31 can be promoted. In addition, since the body fluid can be diffused in the planar direction and guided to the non-skin side T2 via the core wrap, even when the body fluid is locally concentrated, the movement of the body fluid to the non-skin side T2 can be promoted. .

When comparing the body fluid absorption speed of the skin side 15 of the skin side sheet 10 and the body fluid absorption speed of the non-skin side 16 of the skin side sheet 10, the absorption speed of the non-skin side 16 of the skin side sheet 10 is It may be faster than the absorption speed of the skin surface 15 of the skin-side sheet 10 . More specifically, after the first drop of body fluid on each of the skin surface 15 and the non-skin surface 16 of the skin-side sheet 10, the absorption rate when the body fluid is dropped for the second time can be evaluated. The evaluation may be evaluated using a solution similar to body fluids. A measurement solution can be obtained by mixing (a) to (g).
(a) distilled or deionized water: 860 mL
(b) Sodium chloride: 10.00g
(c) Sodium carbonate: 40.00g
(d) Propanetriol (glycerin): 140 mL
(e) Sodium Benzoate: 1.00g
(f) Sodium carboxymethylcellulose: 5g
(g) standard vehicle: 1% (volume fraction)
In order to facilitate the operation, a suitable amount of coloring (food coloring) may be added, specifically, 10 g of coloring (food coloring) can be added.
For the first drop, 10 microliters of the solution is measured and taken on each of the skin surface 15 of the skin-side sheet 10 and the non-skin surface 16 of the skin-side sheet 10 using a 20-microliter micropipette. , one drop. Whether or not all of the bodily fluid has been drawn into the skin-side sheet 10 is visually confirmed, and the time from dripping to drawing is compared as the first absorption speed.
For the second drop, the solution was applied to the skin surface of the skin-side sheet 10 and the non-skin surface of the skin-side sheet 10, where the first drop was made, using a micropipette for 20 microliters, and 10 microliters. Measure out a liter and add 1 drop. It is visually confirmed in the same manner as the first time, and the time from dripping to withdrawal is compared as the first absorption rate. It should be noted that the dropping is performed from a position 10 mm away from the sheet in both the first and second drops.

In the evaluation of the absorption speed, the absorption speed of the non-skin surface 16 of the skin-side sheet 10 may be faster than the absorption speed of the skin surface 15 of the skin-side sheet 10 in the first dropping. According to this aspect, the absorption speed of the non-skin surface 16 of the skin-side sheet 10 is faster than the absorption speed of the skin surface 15 at the time of initial absorption of body fluid, and the ability to draw the body fluid into the absorber 30 can be ensured. Moreover, in the second dropping, the absorption speed of the non-skin surface 16 of the skin-side sheet 10 may be faster than the absorption speed of the skin surface 15 of the skin-side sheet 10 . According to this aspect, when the body fluid is absorbed a plurality of times, the absorption speed of the non-skin surface 16 of the skin-side sheet 10 is faster than the absorption speed of the skin surface 15, so even when the body fluid is repeatedly discharged a plurality of times. It is possible to ensure the ability to draw body fluids into the absorbent body 30 side.

The difference between the absorption speed of the non-skin surface 16 of the skin-side sheet 10 and the absorption speed of the skin-side sheet 15 of the skin-side sheet 10 in the second dropping is the absorption speed of the non-skin surface 16 of the skin-side sheet 10 in the first dropping. and the difference in absorption rate between the skin surface 15 of the skin-side sheet 10 and the skin-side sheet 10 . In general, at the time of the first absorption, body fluid is not retained in the absorbent article 1, which makes it easier to secure the absorption speed and less discomfort to the wearer. However, since body fluid is already retained in the absorbent article 1 during the second absorption, it is difficult to secure the absorption speed, and the wearer tends to feel uncomfortable. In the second time, the absorption speed of the non-skin surface 16 of the skin-side sheet 10 is faster than that of the skin surface 15 of the skin-side sheet 10, and the difference is large. .

A core arrangement region where the absorbent body 30 is arranged in a plan view of the absorbent article has an outer edge region R31 extending inward from the outer edge of the absorbent body 30 and a central region R32 located inside the outer edge region R31. The density of the pulp 31 extending into the skin-side sheet 10 in the central region R32 may be higher than the density of the pulp 31 extending into the skin-side sheet 10 in the outer edge region R31. According to this aspect, in the central region R32 where body fluid is likely to be discharged, it is possible to improve the drawability of body fluid via the pulp 31 . The core arrangement area is an area where the absorbent body 30 is arranged in a plan view of the absorbent article 1 shown in FIG. The outer edge regions R31 may be regions on both sides in the front-rear direction of regions obtained by dividing the core placement region into three equal parts in the front-rear direction, and regions on both sides in the width direction of regions obtained by dividing the core placement region into three equal parts in the width direction. The central region R32 is a region surrounded by the outer edge region R31, and is the center in the front-rear direction of the regions obtained by dividing the core arrangement region into three equal parts in the front-rear direction, and the region obtained by dividing the core arrangement region into three equal parts in the width direction. It may be the central region in the width direction. In another embodiment, the outer edge region R31 may be a region extending inwardly by 10 mm from the outer edge of the core arrangement region, and the central region R32 may be a region surrounded by the outer edge region R31. In addition, in the case where a region including the center in the width direction of the absorbent core has a high basis weight portion in which the basis weight of the absorbent material is higher than that of the surrounding area, the region in which the high basis weight portion is arranged is defined as the central region. , the periphery of the high basis weight portion may be the outer edge region.

Generally, the absorbent article 1 is housed in a package before the absorbent article 1 is used, such as during distribution. At this time, the absorbent article may be accommodated in the package without forming a crease for folding in the thickness direction. That is, the absorbent article may be accommodated in the package in the unfolded state shown in FIG. 1 without achieving a compact shape folded along the crease. According to this aspect, it is possible to prevent the gaps between the skin-side fibers 40 from being crushed or biased due to the formation of the creases, and to suppress deformation of the pulp 31 extending in the skin-side sheet 10 .

The average angle formed by the pulp 31 extending in the skin-side sheet 10 and the thickness direction of the skin-side sheet 10 may be an acute angle. The angle of the pulp 31 may be any angle of the pulp 31 extending into the skin-side sheet 10. More preferably, 30% or more of the pulps 31 extending into the skin-side sheet 10 have an angle of It can be sharp. According to this aspect, the pulp 31 in the skin-side sheet 10 extends along the thickness direction T rather than in the plane direction. It is easy to obtain the effect of drawing body fluids into the body.

The absorbent article may be provided with an absorbent pressing portion 47 in which the skin-side sheet 10 and the absorbent body 30 are compressed in the thickness direction T. The absorbing and compressing portion 47 physically shortens the distance between the skin-side sheet 10 and the absorbent body 30, thereby further improving the ability to draw bodily fluids to the non-skin side T2. In addition, the body fluid once drawn into the absorbing and compressing portion 47 can be smoothly diffused to the surrounding area having a lower density than the absorbing and compressing portion 47, and the diffusion speed of the body fluid can be improved.

Next, an example of a method for manufacturing an absorbent article having such a structure will be described with reference to FIG. In the following description, well-known steps can be appropriately adopted for some steps in the manufacturing direction except for the steps concerned. The manufacturing method of the absorbent article includes a skin-side sheet conveying step S1 of conveying the skin-side sheet 10, a core forming step S2 of forming an absorbent core, and a core placement step S3 of arranging the absorbent core on the skin-side sheet 10. , a suction step S4 for sucking the absorbent core and the skin-side sheet 10, and a stacking step S5 for arranging the non-skin-side sheet. The conveying direction of the absorbent article manufacturing method of the present embodiment is along the width direction of the absorbent article, which is a so-called lateral flow manufacturing method. However, in a modified example, the conveying direction of the absorbent article manufacturing method may be a so-called longitudinal manufacturing method in which the absorbent article is along the front-rear direction.

In the skin-side sheet conveying step S1, the skin-side continuous body 10C in which the skin-side sheets 10 are continuous in the conveying direction MD is continuously conveyed in the conveying direction MD. The conveying direction MD may be along the orientation direction of the skin-side fibers 40 of the skin-side sheet 10 . The core forming step S2 may be performed by a drum formed with a pattern plate onto which the absorbent material is laminated to form the absorbent core 33 . The core placement step S3 places the absorbent core 33 on the skin-side continuum 10C. At this time, the skin-side sheet 10 may be in contact with the conveying surface of a conveying device such as a conveyor, and the absorbent core 33 may be arranged on the skin-side sheet 10 . In the suction step S4, both the skin-side sheet 10 and the absorbent core 33 are sucked. At this time, suction is performed from the conveying surface side of the conveying device, that is, the surface side of the skin-side sheet 10 opposite to the absorbent core 33 . A part of the pulp 31 contained in the absorbent core 33 is drawn into the skin-side sheet 10 by the suction and arranged in the skin-side sheet 10 . In the lamination step S5, the non-skin-side continuous body 20C, in which the non-skin-side sheet 20 is continuous in the transport direction MD, is transported, and is merged with the absorbent core 33 and the skin-side continuous body 10C. The absorbent article according to the present embodiment can be obtained by having at least this step. The amount and position of the pulp 31 extending into the skin-side sheet 10 can be adjusted by the position and strength of the suction step. In another embodiment, the skin-side sheet conveying step S1 may be performed after the core forming step S2. In this other embodiment, in order to suction both the absorbent core 33 and the skin-side sheet 10, a step of joining the absorbent cores 33 of the skin-side sheet 10 is provided before the suction step S4.

Next, an absorbent article according to a second embodiment will be described in detail with reference to FIG. FIG. 5 is a cross-sectional view of the absorbent article according to the second embodiment with reference to the schematic enlarged view of FIG. In addition, in the following description, configurations different from those of the first embodiment will be described, and descriptions of configurations similar to those of the first embodiment will be omitted. Also, unless otherwise specified, the preferred forms and modifications in the first embodiment are also applicable to the second embodiment. The skin-side sheet 10X of the second embodiment has an apertured film. An apertured film is composed of a film and does not have skin-side fibers unlike a nonwoven fabric. The perforated film has a plurality of perforations with a diameter of 0.3 mm to 2.0 mm, and guides body fluids in the thickness direction through the perforations. In the second embodiment the pulp 31 extends into the apertures 38 of the apertured film 37 . According to the second embodiment, the pulp 31 extends in the perforated film, and body fluids in the skin-side sheet can be positively transferred to the absorbent body via the pulp 31 . Therefore, the present invention provides an absorbent article capable of suppressing deterioration of bodily fluid drawing-in property and quickly transferring bodily fluid received by the skin-side sheet to the absorbent body 30 .

In the second embodiment, the skin-side sheet 10 may have a sheet other than the perforated film. The other sheet may be a nonwoven fabric having skin-side fibers, or may be another perforated sheet. The perforated film may constitute the top sheet of the skin-side sheet 10 . According to this configuration, the contact with the skin can be softened, and the feel on the skin can be improved. A second sheet made of a porous sheet or a second sheet made of a nonwoven fabric may be placed on the non-skin side T2 of the porous film as the top sheet. Moreover, the perforated film may constitute the second sheet of the skin-side sheet 10 . A top sheet made of a porous sheet or a top sheet made of a nonwoven fabric may be placed on the skin side T1 of the porous film as the second sheet.

Although the present invention has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented with modifications and variations without departing from the spirit and scope of the invention defined by the claims. Accordingly, the descriptions herein are for the purpose of illustration and description, and are not intended to have any limiting meaning with respect to the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can transfer the bodily fluid received with the skin side sheet to an absorber rapidly can be provided.

1: Absorbent article, 10, 10X: Skin side sheet, 11: First layer, 12: Second layer, 13: Top sheet, 15: Skin side, 16: Non-skin side, 20: Non-skin side sheet, 30 : absorber 31: pulp 33: absorbent core 37: perforated film 40: skin-side fibers 41: small-diameter fibers 42: large-diameter fibers D1: first direction D2: second direction L: Front-back direction, R11: skin side region, R12: non-skin side region, R31: outer edge region, R32: central region, T: thickness direction, T1: skin side, T2: non-skin side, W: width direction

Claims (16)

an absorbent body having an absorbent material comprising pulp;
and a skin-side sheet arranged closer to the skin than the absorbent body,
The skin-side sheet includes skin-side fibers including small-diameter fibers and large-diameter fibers having a fiber system thicker than the small-diameter fibers,
At least the small-diameter fibers are arranged on the skin surface of the skin-side sheet,
At least the large-diameter fibers are arranged on the non-skin surface of the skin-side sheet,
The absorbent article, wherein the pulp extends from the non-skin surface of the skin-side sheet across the skin-side fibers into the skin-side sheet. The skin-side sheet includes a skin-side area located closer to the skin than the center of the skin-side sheet in the thickness direction, and a non-skin-side area located closer to the non-skin side than the center of the skin-side sheet in the thickness direction. has
The absorbent article according to claim 1, wherein the density of the skin-side fibers in the skin-side region is higher than the density of the skin-side fibers in the non-skin-side region. The skin-side sheet has a top sheet that forms the skin surface of the skin-side sheet,
The top sheet has a first layer having the small-diameter fibers and a second layer having the large-diameter fibers,
3. The absorbent article of claim 1 or claim 2, wherein said pulp extends into said second layer. The skin-side sheet has a top sheet forming the skin surface of the skin-side sheet and a second sheet positioned on the non-skin side of the top sheet,
The top sheet has the small-diameter fibers,
The second sheet has the large-diameter fibers,
The absorbent article according to claim 1 or 2, wherein the pulp reaches the skin surface of the second sheet. 5. The absorbent article according to claim 4, wherein the average inter-fiber distance of the second sheet is larger than the average inter-fiber distance of the top sheet. Having a first direction (D1) along the orientation direction of the skin-side fibers on the skin surface of the skin-side sheet and a second direction (D2) orthogonal to the first direction,
The ratio of the tensile strength of the skin-side sheet in the first direction to the tensile strength of the skin-side sheet in the second direction is 6 or more,
The absorbent article according to any one of claims 1 to 5, wherein the skin-side sheet has a tensile strength in the first direction of 1.0 N or more and 2.5 N or less. having a first direction along the orientation direction of the skin-side fibers on the skin surface of the skin-side sheet and a second direction orthogonal to the first direction;
The density of the pulp extending into the skin-side sheet at the end of the absorbent body in the first direction is the density of the pulp extending into the skin-side sheet at the end of the absorbent body in the second direction. 7. The absorbent article of any one of claims 1-6, wherein the absorbent article is higher than. an absorbent body having an absorbent material comprising pulp;
and a skin-side sheet arranged closer to the skin than the absorbent body,
The skin-side sheet has an apertured film forming the skin surface of the skin-side sheet,
An absorbent article, wherein the pulp extends into the apertures of the apertured film. The absorbent article according to any one of claims 1 to 8, wherein the pulp is arranged only in a non-skin-side region located on the non-skin side of the center of the skin-side sheet in the thickness direction. . The absorbent body has an absorbent core in which the absorbent material is laminated,
10. The absorbent core according to any one of claims 1 to 9, wherein no core wrap is arranged between the absorbent core and the skin-side sheet, and the non-skin surface of the absorbent core is in contact with the skin-side sheet. absorbent article. The absorbent body has an absorbent core laminated with the absorbent material and a core wrap made of nonwoven fabric,
10. The absorbent article according to any one of claims 1 to 9, wherein the pulp of said absorbent core penetrates said core wrap and extends into said skin side sheet. When the bodily fluid is dripped for the second time after dripping the bodily fluid for the first time on each of the skin surface and the non-skin surface of the skin-side sheet,
12. The absorption according to any one of claims 1 to 11, wherein in the second dropping, the absorption rate of the non-skin surface of the skin-side sheet is faster than the absorption rate of the skin-side sheet of the skin side sheet. sexual goods. In the first dropping, the absorption speed of the non-skin surface of the skin-side sheet is faster than the absorption speed of the skin-side sheet of the skin-side sheet,
The difference between the absorption speed of the non-skin surface of the skin-side sheet and the absorption speed of the skin-side sheet in the second dropping is the absorption speed of the non-skin surface of the skin-side sheet in the first dropping. 13. The absorbent article according to claim 12, wherein the difference in absorption rate of the skin surface of the skin-side sheet is larger than that of the absorbent article. In a plan view of the absorbent article, the core arrangement region in which the absorbent body is arranged has an outer edge region extending inward from the outer edge of the absorbent body and a central region located inside the outer edge region,
14. Any one of claims 1 to 13, wherein the density of pulp extending into the skin-side sheet in the central region is higher than the density of pulp extending into the skin-side sheet in the outer edge region. Absorbent article according to. 15. The absorbent article according to any one of claims 1 to 14, wherein the absorbent article is accommodated in a package before use of the absorbent article without forming folds for folding in the thickness direction. . The absorbent article according to any one of claims 1 to 15, wherein an average angle formed by the pulp extending in the skin-side sheet and the thickness direction of the skin-side sheet is an acute angle.

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