Process for melt-spinning acrylonitrile polymer fiber
US4205039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1978 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Apr 12, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Spinning of a melt of water and an acrylonitrile polymer containing hydrophobic moieties through a spinnerette into a steam-pressurized solidification zone results in improved fiber when the amount of water in the melt is in the lower half of the range necessary to provide the melt under the conditions of extrusion, the amount of hydrophilic moieties contained in the polymer are sufficient to control the rate of release of water from the extrudate, the steam conditions in the solidification are sufficient to prevent formation of a separate water phase, and drying of the resulting extrudate under conditions of temperature and humidity to remove water therefrom while avoiding formation of a separate water phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.