Absorbent product

Abstract

An absorbent product has a top sheet, an absorbent core and a back sheet. The absorbent core includes 40% by weight or more of high absorbent resin powder and it is possible to slim down the absorbent core while keeping a sufficient amount of absorption to thereby achieve slimming down of the absorbent product. A top sheet lower part contacting the high absorbent resin powder in the absorbent core includes hydrophilic fibers having water retention characteristics, and moisture is temporarily retained in the top sheet lower part before reaching the absorbent core and rapidly disperses in a range facing the absorbent core of the top sheet lower part. As a result, it is possible to reliably absorb the moisture of excrement in the absorbent core and to simplify a structure of the absorbent product.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an absorbent product for receiving excrement from a wearer.[0003]2. Description of the Background Art[0004]In an absorbent product such as a disposal diaper, conventionally, an absorbent core which is formed by sandwiching crushed pulp and high absorbent resin powder between tissue papers, nonwoven fabrics or the like has been used for absorbing moisture such as urine. Recently, a thin absorbent core where high absorbent resin powder is bonded on a base sheet such as a nonwoven fabric is used; for example, International Patent Publication No. WO 01 / 54640 (Document 1) discloses a disposal wearing product having a sheet-like absorbent where a layer of highly water absorbing composite composition which is made of micro-fibrillated cellulose and highly water absorbing resin (highly absorbing resin), is partly bonded on a nonwoven fabric support.[0005]In such a thin absorbent not using the cr...

AI Technical Summary

Benefits of technology

[0010]The present invention is intended for an absorbent product for receiving excrement from a wearer. It is an object of the present invention to achieve slimming down of the absorbent product and simplification of a structure of the absorbent product, and to reliably absorb moisture of the excrement.

[0012]In the absorbent product, since the absorbent core includes 40% by weight or more of the high absorbent resin powder, it is possible to achieve slimming down of the absorbent product while keeping a sufficient amount of absorption. The top sheet lower part contacts the high absorbent resin powder and includes the hydrophilic fibers and thereby, moisture such as urine is temporarily retained and rapidly disperses in the top sheet lower part. As a result, it is possible to reliably absorb moisture of excrement in the absorbent core and to achieve simplification of a structure of the absorbent product. Since a ratio of the hydrophilic fibers by weight in the top sheet upper part is lower than that in the top sheet lower part, it is hard for moisture to be temporarily retained in the top sheet upper part as compared with the top sheet lower part and it is possible to improve the feel of the absorbent product.

Problems solved by technology

In such a thin absorbent not using the crushed pulp, since the absorption speed of the highly water absorbing resin is lower than that of the crushed pulp, if a wearer urinates greatly or the like, there is a possibility that large amounts of urination concentrates on a portion close to a urination portion of the absorbent, absorption of the urination is delayed and leak of urine from an absorbent product occurs.

The disposal wearing product of Document 1 is slimmed down as compared with the absorbent product having the absorbent core using the crushed pulp, however, the temporal water-storage layer is bulky and thick and there is a limitation in slimming down of the disposal wearing product.

Since the temporal water-storage layer, which is a separated member from the top sheet and the sheet-like absorbent, is provide between the top sheet and the sheet-like absorbent, the structure of the disposal wearing product is complicated and there is a possibility that the manufacturing cost of the disposal wearing product is increased.

Therefore, in a case where large amounts of urine or the like is discharged, even if moisture disperses in the thick fineness layer, it is thought much moisture over an absorption speed of the absorption layer moves from the diffusion sheet to the absorption layer in a diffusion range and there is a possibility that leak from the absorbent product occurs.