Absorbent fibrous structure and producing method thereof
US5173521A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/27
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.