SHEETLIKE STRUCTURES OF WATER-ABSORBENT OPEN-CELLED FOAMS BASED ON CROSSLINKED ACID-FUNCTIONAL POLYMERS

摘要

Sheetlike structures formed of water-absorbent, predominantly open-celled foams based on crosslinked acid-functional polymers having a Free Absorption Rate (FAR) of at least 11 g/g.sec for 0.9% by weight aqueous sodium chloride solution, the surface of said sheetlike structures having edge lengths x and y having been postcrosslinked so that the crosslink density decreases in the z direction between this surface and the opposite surface and the use of water-absorbent, predominantly open-celled foams based on crosslinked acid-functional polymers in the form of sheetlike structures having edge lengths x and y and wherein the crosslink density has a gradient in the z direction, as an acquisition, distribution and/or storage layer in hygiene articles.