Method for producing polyacetal fiber
US11761121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2018 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Apr 26, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G3/324
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a polyacetal fiber that presents an improved whiteness unevenness is provided. According to one embodiment, there is provided a polyacetal fiber production method that yields a polyacetal fiber using an oxymethylene copolymer having a melt index, at 190° C. under a load of 2.16 kg, of 5-60 g/10 min, wherein the production method includes taking off the polyacetal fiber from the discharge nozzle of a spinning apparatus, and drawing the taken-off polyacetal fiber. The tensile elongation E1 of the polyacetal fiber after the taking off is 20%-500%; the tensile elongation E2 of the polyacetal fiber after the drawing is 10%-100%; E1≥E2; and the single fiber thickness of the polyacetal fiber after the drawing is 0.7-5.0 denier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.