Method of making crimped solvent-spun cellulose fibre
US5591388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Apr 25, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Staple fibres of solvent-spun cellulose are made by a method in which: PA1 i) cellulose is dissolved in an amine oxide solvent to form a hot cellulose solution, PA1 ii) the hot cellulose solution is extruded through a die assembly to form a tow of continuous filaments, PA1 iii) the tow is passed through a water bath to leach out the amine oxide, PA1 iv) the tow is crimped by passing through a stuffer box in which it is compressed to apply crimp, PA1 v) dry steam being injected into the stuffer box during the crimping process, and PA1 vi) the crimped tow is passed to a cutter and cut to the desired fibre length. An apparatus is also provided in which the staple fibres can be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.