Poly(meth)acrylic acid (salt) water-absorbing resin and absorbent article
AssigneeNippon Shokubai Co., Ltd.
InventorsKanako TSURU, Satoshi MATSUMOTO, Sachie KITABATA
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Abstract
An object lies in providing a water-absorbing resin capable of absorbing body fluids in a wide viscosity range from a body fluid having a low viscosity to a body fluid having a high viscosity, while maintaining water absorption capacity and water absorption speed. Used is a polyacrylic acid (salt)-based water-absorbing resin having: a free swell rate (A) with respect to an aqueous polyethylene oxide solution of 40° C. of 0.15 g·g−1·s−1 or more; a free swell rate (B) with respect to a physiological saline of 40° C. of 0.40 g·g−1·s−1 or more; and a free swell rate (A)/free swell rate (B) of 0.20 or more.
Claims8
A water-absorbing resin, wherein said water-absorbing resin is a polyacrylic acid (salt)-based water-absorbing resin, and said water-absorbing resin has:
- a free swell rate (A) with respect to an aqueous polyethylene oxide solution of 40° C. of 0.15 g·g−1·s−1 or more;
- a free swell rate (B) with respect to a physiological saline of 40° C. of 0.40 g·g−1·s−1 or more;
- and
- a free swell rate (A)/free swell rate (B) of 0.20 or more.
Dependencies are inferred from the claim text.