JP2019118799A5 - - Google Patents

Description

From the same viewpoint, the surface sheet 21 preferably has a longer interfiber distance (lower fiber density) than the sweat absorbing sheet 10. By adopting such a configuration, the magnitude relationship of "surface sheet 21> sweat absorbing sheet 10" is established with respect to the interfiber distance, or the magnitude relationship of "surface sheet 21 <sweat absorbing sheet 10" is established with respect to the fiber density. Regarding the liquid diffusivity, the magnitude relationship of "surface sheet 21 <sweat absorbing sheet 10" is established. , The sweat exceeding the absorption capacity of the sweat absorbing sheet 10 is transferred to the surface sheet 21, and the diaper 1 is provided with the ability to continue to absorb sweat. The interfiber distance is measured by the following method.

In the diaper 1, as described above, the sweat absorbing sheet 10, the surface sheet 21, the core wrap sheet 25, and the absorbency are attached to the ventral side F and the dorsal side R, which are the waist circumferences arranged around the wearer's waist when worn. with the core 24 is disposed, girth Ri elastic member 33 is disposed in a stretched state in the transverse direction Y, it has a stretchability in the transverse direction Y as a whole, respectively ventral F and the back side R is However, it is possible to improve the sweat absorption property of the diaper 1 by devising the elongation stress in the lateral direction Y, which is closely related to this elasticity.

Claims (25)

It has a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and includes a liquid-retaining absorbent core and a core wrap sheet in contact with the skin-facing surface of the absorbent core. An absorbent article in which a surface sheet and a sweat-absorbing sheet are arranged in the order of proximity to the core wrap sheet on the skin-facing surface side of the core wrap sheet.
A part of the sweat absorbing sheet is arranged so as to face the surface sheet so as to be in contact with the surface sheet.
An absorbent article having a liquid diffusibility of the surface sheet lower than the liquid diffusivity of the sweat absorbing sheet and lower than the liquid diffusivity of the core wrap sheet. The absorbent article according to claim 1, wherein the core wrap sheet has a larger liquid diffusion area than the sweat absorbing sheet. The absorbent article includes a waist circumference portion that is arranged around the waist of the wearer when worn, and the sweat absorbing sheet, the surface sheet, the core wrap sheet, and the absorbent core are arranged around the waist circumference. At the same time, the elastic members are arranged in a laterally extended state.
The sweat-absorbing sheet has a vertically outward extending portion extending outward in the vertical direction from the vertical end of the surface sheet around the waist.
In the waist circumference portion, the region where the sweat absorbing sheet and the surface sheet are in the same position in the vertical direction is the region A, and the region where the sweat absorbing sheet and the surface sheet are in the same position in the vertical direction is the region B. The absorbent article according to claim 1 or 2 , wherein the region A has a larger lateral elongation stress than the region B. The waist circumference is divided into a ventral portion arranged on the ventral side of the wearer and a dorsal portion arranged on the dorsal side at the time of wearing, and the ventral portion and the dorsal portion of each of the regions A. The surface sheet is arranged in the central portion in the lateral direction, and the sweat absorbing sheet extends laterally over the central portion in the lateral direction of the region A and both sides thereof.
The absorption according to claim 3 , wherein the laterally central portion of the region A where the sweat absorbing sheet and the surface sheet overlap in the thickness direction has lower lateral elasticity than the laterally both side portions of the region A. Sex goods. The absorbent article according to any one of claims 1 to 4 , wherein the sweat-absorbing sheet is joined to the surface sheet at a portion arranged so as to be in contact with the surface sheet. The absorbent article according to claim 5, wherein the bonding between the sweat absorbing sheet and the surface sheet is a partial bonding. The absorbent article according to claim 6, wherein the ratio of the total area of the joint portion between the two sheets to the total area of the overlapping portion of the sweat absorbing sheet and the surface sheet is 20% or less. The absorbent article according to any one of claims 1 to 7 , wherein the sweat-absorbing sheet has a lower hydrophilicity on the skin-facing surface side than on the non-skin-facing surface side. The absorbent article according to any one of claims 1 to 8 , wherein the surface sheet has a concavo-convex shape on the side facing the skin, and the convex portion of the concavo-convex shape makes contact with the sweat-absorbing sheet. .. 9. The uneven shape of the surface sheet is a shape in which a plurality of convex portions are arranged in a scattered pattern over the entire surface of the surface sheet facing the skin, and the periphery of each convex portion is a concave portion. Absorbent article described in. The absorbent article according to claim 9 or 10, wherein the convex portion of the surface sheet and the sweat absorbing sheet are joined. The ratio of the lateral elongation stress of the region A to the lateral elongation stress of the region B is 1.05 or more and 2.5 or less as the region A / region B on the premise that the region A> the region B. The absorbent article according to claim 3 or 4. The absorbent article according to any one of claims 3, 4 and 12, wherein the lateral elongation stress of the region A is 0.04 N / mm or more and 0.12 N / mm or less. The absorbent article according to any one of claims 3, 4, 12 and 13, wherein the lateral elongation stress of the region B is 0.02 N / mm or more and 0.10 N / mm or less. In the region A1 where the sweat-absorbing sheet and the surface sheet overlap in the thickness direction, a hydrophobic sheet is interposed between the two sheets, and the sweat-absorbing sheet is arranged from the inner end in the vertical direction to the inner side in the vertical direction. The absorbent article according to any one of claims 1 to 14 , which has a vertically inward extending portion that extends, and the vertically inward extending portion is arranged so as to be in contact with the surface sheet. .. The region A2 in which the sweat-absorbing sheet and the hydrophobic sheet are in the same position in the vertical direction is in the horizontal direction as compared with the region A3 in which the sweat-absorbing sheet is in the same position in the vertical direction as the vertically inwardly extending portion. The absorbent article according to claim 15, which has a large elongation stress. The ratio of the lateral elongation stress of the region A2 to the lateral elongation stress of the region A3 is 1.03 or more and 2.5 or less as the region A2 / region A3 on the premise that the region A2> the region A3. The absorbent article according to claim 16. The absorbent article according to claim 16 or 17, wherein the lateral elongation stress of the region A2 is 0.04 N / mm or more and 0.12 N / mm or less. The absorbent article according to any one of claims 16 to 18, wherein the lateral elongation stress of the region A3 is 0.02 N / mm or more and 0.10 N / mm or less. The absorbent article according to any one of claims 16 to 19, wherein the region A2 has elasticity in the lateral direction. The absorbent article according to any one of claims 1 to 20 , wherein the surface sheet has a longer interfiber distance than the core wrap sheet. The absorbent article according to any one of claims 1 to 21 , wherein the surface sheet has a longer interfiber distance than the sweat absorbing sheet. Any one of claims 1 to 22, wherein the ratio of the interfiber distance of the surface sheet to the interfiber distance of the sweat absorbing sheet is 1.5 or more and 10 or less as the former / the latter on the premise that the former> the latter. Absorbent article described in. The absorbent article according to any one of claims 1 to 23, wherein the surface sheet has a lower fiber density than the sweat absorbing sheet. The absorbent article according to any one of claims 1 to 24 , wherein the fiber orientation of the constituent fibers of the sweat-absorbing sheet and the fiber orientation of the constituent fibers of the surface sheet intersect each other.