Title:
POLYAMIDE FIBERS FOR AIRBAG AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2022/075329
Kind Code:
A1
Abstract:
Provided are polyamide fibers for a woven fabric for an airbag which make it possible to suppress wrinkling in the woven fabric following a heat-shrinking treatment and also suppress variation in air permeability by improving uniformity. The present invention pertains to: polyamide fibers for an airbag which are characterized in that the fiber size thereof is 200-800 dtex, inclusive, and the stress retention rate thereof when obtained using a prescribed procedure is at least 3.0%; and a method for producing said polyamide fibers for an airbag, the method being characterized in that during the thermosetting step and the relaxing step thereof, the contact time between thread and a roller which is at least 190°C is at least 30 msec and less than 110 msec, the temperature of the thermosetting roller is 190-205°C, inclusive, the temperature of the relaxing roller is greater than 100°C and less than 190°C, and the speed ratio of the relaxing roller to the thermosetting roller satisfies this equation: 1.00 < relaxing roller speed/thermosetting roller speed < 1.10.
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Inventors:
NAYUKI RYO (JP)
Application Number:
PCT/JP2021/036858
Publication Date:
April 14, 2022
Filing Date:
October 05, 2021
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
D01F6/60; D03D1/02
Domestic Patent References:
| WO2013084322A1 | 2013-06-13 | |||
| WO2019039396A1 | 2019-02-28 |
Foreign References:
| JPH05156513A | 1993-06-22 | |||
| JP2008156770A | 2008-07-10 | |||
| JP2000129530A | 2000-05-09 | |||
| JPS4624730B1 | 1971-07-16 | |||
| JP2000027029A | 2000-01-25 | |||
| JPH06248508A | 1994-09-06 | |||
| US3493646A | 1970-02-03 | |||
| KR101611579B1 | 2016-04-11 | |||
| JP5253685B1 | 2013-07-31 | |||
| JP5969999B2 | 2016-08-17 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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