Production of high strength cellulose fiber using zinc chloride, organic solvents and aqueous solution
US4999149A · kind A · utility
10Cited by
2References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA22C2013/0096
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to the production of high tensile strength, solvent-spun cellulose fiber which is stable in alkaline solutions. More particularly, the invention relates to a process in which cellulose is solubilized in a zinc chloride solution then extruded into a coagulation medium in which the cellulose fibers form. The fibers are removed from the coagulation medium, treated to remove the coagulation medium, stretched and recrystallized in water, thus forming the high tensile strength, solvent-spun cellulose fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.