Cross-linking of cellulose fibers in gas suspension
US4113936A · kind A · utility
5Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Oct 13, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M13/127
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for cross-linking cellulose with formaldehyde. The pulp is fluffed, aerated and exposed to a reaction mixture comprising formaldehyde, hydrochloric acid and formic acid as finely divided droplets or vapors. The wetted fibers are then cured in a hot air stream at 180.degree. C during a few seconds and separated from the gaseous effluents. The whole procedure lasts less than 1 minute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.