Title:
METHOD FOR MANUFACTURING POLYACETAL FIBER
Document Type and Number:
WIPO Patent Application WO/2019/012877
Kind Code:
A1
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.
Inventors:
ITOU AKIRA (JP)
SUNAGA DAISUKE (JP)
MIKAMI SUNAO (JP)
SUNAGA DAISUKE (JP)
MIKAMI SUNAO (JP)
Application Number:
PCT/JP2018/021958
Publication Date:
January 17, 2019
Filing Date:
June 08, 2018
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
D01F6/50; D02J1/22
Domestic Patent References:
| WO2016147998A1 | 2016-09-22 | |||
| WO2017047460A1 | 2017-03-23 | |||
| WO2017047459A1 | 2017-03-23 | |||
| WO2014050448A1 | 2014-04-03 |
Foreign References:
| JP2013227712A | 2013-11-07 | |||
| JP2008308791A | 2008-12-25 | |||
| JP2002146637A | 2002-05-22 | |||
| JP2003089925A | 2003-03-28 | |||
| CN104499087A | 2015-04-08 | |||
| JPS497023B1 | 1974-02-18 | |||
| JP2001172821A | 2001-06-26 |
Other References:
See also references of EP 3653766A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
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