Improved yarn extraction process
US4070431A · kind A · utility
23Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Dec 21, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/605
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The salt content of neutralized aromatic polyamide fibers spun from an acid solution downwardly into a spin tube containing the fibers and a coagulating liquid is reduced when a gas is injected into the spin tube 0.25 to 20 cm. downstream from the entrance of the spin tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.