Title:
METHOD FOR PRODUCING POLYACETAL FIBER
Document Type and Number:
WIPO Patent Application WO/2019/012876
Kind Code:
A1
Abstract:
The present invention provides a method for producing a polyacetal fiber that presents an improved whiteness unevenness. 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 contains a take-off step for taking off the polyacetal fiber from the nozzle of a spinning apparatus, and a drawing step for drawing the taken-off polyacetal fiber. The tensile elongation E1 of the polyacetal fiber after the take-off step is 20%-500%; the tensile elongation E2 of the polyacetal fiber after the drawing step is 10%-100%; E1 ≥ E2; and the single fiber thickness of the polyacetal fiber after the drawing step is 0.7-5.0 denier.
Inventors:
ITOU AKIRA (JP)
SUNAGA DAISUKE (JP)
MIKAMI SUNAO (JP)
SUNAGA DAISUKE (JP)
MIKAMI SUNAO (JP)
Application Number:
PCT/JP2018/021957
Publication Date:
January 17, 2019
Filing Date:
June 08, 2018
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
D01F6/66; D02G3/02; C08G2/00
Domestic Patent References:
| WO2014050448A1 | 2014-04-03 |
Foreign References:
| JP2005256189A | 2005-09-22 | |||
| JP2006009196A | 2006-01-12 | |||
| JP2003089925A | 2003-03-28 | |||
| JPS6052618A | 1985-03-25 | |||
| CN104499087A | 2015-04-08 | |||
| JPS497023B1 | 1974-02-18 | |||
| JP2001172821A | 2001-06-26 |
Other References:
See also references of EP 3653767A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
Download PDF:
Previous Patent: METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE
Next Patent: METHOD FOR MANUFACTURING POLYACETAL FIBER
Next Patent: METHOD FOR MANUFACTURING POLYACETAL FIBER