Method for manufacturing polyacetal fiber
US11441242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2018 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Nov 20, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02J1/225
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method for manufacturing a polyacetal fiber in which whiteness irregularity is improved. One embodiment of the present invention provides a method for manufacturing a polyacetal fiber, wherein the method includes a discharge step, a takeup step, a stretching step, and a winding step, the steps being continuously performed, an oxymethylene copolymer being used as the raw material of the polyacetal fiber, the oxymethylene copolymer having an oxymethylene unit and an oxyethylene unit, the content of the oxyethylene unit being 0.5-7.0 moles to 100 moles of the oxymethylene unit, the roller temperature of a stretching unit used in the stretching step being 130-155° C., and operation parameters of the method being set so as to satisfy a prescribed numerical formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.