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.
POLYAMIDE FIBERS FOR AIRBAG AND METHOD FOR PRODUCING SAME
POLYAMIDFASERN FÜR AIRBAG UND VERFAHREN ZUR HERSTELLUNG DAVON
FIBRES DE POLYAMIDE POUR COUSSIN GONFLABLE DE SÉCURITÉ ET LEUR PROCÉDÉ DE FABRICATION
2025-03-26
Patent
Electronic Resource
English
IPC: | D01F Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern , CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / D01D MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS , Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern / D03D WOVEN FABRICS , Gewebe |
Polyamide Fibers for Airbag and Method for Producing Same
European Patent Office | 2023
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