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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    Title :

    POLYAMIDE FIBERS FOR AIRBAG AND METHOD FOR PRODUCING SAME


    Additional title:

    POLYAMIDFASERN FÜR AIRBAG UND VERFAHREN ZUR HERSTELLUNG DAVON
    FIBRES DE POLYAMIDE POUR COUSSIN GONFLABLE DE SÉCURITÉ ET LEUR PROCÉDÉ DE FABRICATION


    Contributors:
    NAYUKI RYO (author)

    Publication date :

    2025-03-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    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



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