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US 6,150,582 AGranted
Absorbent article and production process therefor
AssigneeNippon Shokubai Co., Ltd.
InventorsKatsuyuki Wada, Naoko Takahashi, Hiroko Ueda, Kinya Nagasuna
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AssigneeNippon Shokubai Co., Ltd.
InventorsKatsuyuki Wada, Naoko Takahashi, Hiroko Ueda, Kinya Nagasuna
Estimating the term…
The invention clarifies absorption properties of a water-absorbent resin as needed in the case where the ratio by weight of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material is ".alpha.," and further the invention provides an absorbent article using a water-absorbent resin which is optimal to the ratio by weight ".alpha." of the water-absorbent resin. A water-absorbent resin, having a concentration absorption index of 35 or more as shown by the following equation (1): A(1-.alpha.)+B.alpha. (1) wherein A (g/g) is an absorption capacity of the resin under no load, and B (g/g) is an absorption capacity of the resin under a load, is used as the water-absorbent resin as used for the absorbent article of at least 0.4 in the ratio by weight ".alpha." of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material.
A process for producing an absorbent article having an absorbent layer, a liquid-permeable surface sheet, and a liquid-impermeable back sheet, wherein the absorbent layer includes an absorbent matter having a water-absorbent resin and a fibrous material in a ratio by weight, ".alpha.," of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material, wherein the ratio by weight ".alpha." is at least 0.4, with the process comprising the step of using as the water-absorbent resin a water-absorbent resin which has a concentration absorption index of 35 or more as shown by the following equation (1):
An absorbent article, comprising an absorbent layer, a liquid-permeable surface sheet, and a liquid-impermeable back sheet, wherein the absorbent layer includes an absorbent matter having a water-absorbent resin and a fibrous material in a ratio by weight, ".alpha.," of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material, wherein the ratio by weight ".alpha." is at least 0.4, and wherein the water-absorbent resin has a concentration absorption index of 35 or more as shown by the following equation (1):
Dependencies are inferred from the claim text.