Method of producing high bulking anfractuous cellulosic fiber using anhydrous liquid ammonia
US4869782A · kind A · utility
35Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/004
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Anfractuous cellulose fibers exhibiting exceptional high bulking properties are produced by treatment of dry hammermilled wood cellulose fibers with anhydrous liquid ammonia at substantially atmospheric pressure. Fibrous webs of enhanced bulk are produced by preparing an aqueous furnish comprising at least ten percent by weight ammonia treated anfractuous fibers in admixture with conventional papermaking fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.