Absorbent fibrous structure and producing method thereof
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United States of America Patent
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Dec 22, 1992
Grant Date -
N/A
app pub date -
Jun 14, 1991
filing date -
Jun 19, 1990
priority date (Note) -
Expired
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Abstract
An absorbent fibrous structure comprising salts of fibrous carboxymethyl cellulose. In this structure, polyelectrolyte complexes are formed in at least a part of the salts of fibrous carboxymethyl cellulose by cationic water-soluble polymers. Each cationic water-soluble polymer comprises repeating units having at least one of primary, secondary, tertiary and quaternary nitrogen atoms and does not substantially have functional groups for forming cross-linking other than the nitrogen atoms. According to a preferred embodiment, polyamine resin was added to a suspension of Na-salts of fibrous CMC to prepare a stock, and from this stock, an absorbent fibrous sheet is produced by a paper-making method. Then, this sheet had a high water absorbency and had high wet tensile strength even after absorbing water. Further, slime was not generated at all and the sheet-surface was neutral.
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