Method for preparing polybenzoxazole or polybenzothiazole fibers
US5534205A · kind A · utility
16Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 5, 2014 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/74
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a process for preparing polybenzoxazole or polybenzothiazole filaments by extruding a polybenzoxazole or polybenzothiazole dope, drawing the dope filament across an air gap, and coagulating the dope filament; the number of filament breaks can be reduced by placing a stress isolation device after extruding but before coagulating the filament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.