Process for the thermal stabilization of acrylic fibers

Details Process for the thermal stabilization of acrylic fibers Process for the thermal stabilization of acrylic fibers

1981-05-18

1983-01-25

Woo, Jay H.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

264 25, 264 292, 4234474, C01B 3107

Patent

active

043701418

ABSTRACT:
An improved process is provided whereby acrylic fibers are thermally stabilized (i.e., rendered black in appearance and non-burning when subjected to an ordinary match flame). The acrylic fibrous material, while present in an oxygen-containing atmosphere, is subjected to the intermittent irradiation of a laser beam which surprisingly has been found to expedite the desired thermal stabilization when compared to commonly employed processes which transfer heat to the acrylic fibers primarily by the convective flow of a heated gas (e.g., air) while the acrylic fibers are suspended in a hot gas oven. In a preferred embodiment the laser beam is produced by the use of a CO.sub.2 infrared laser.

REFERENCES:
patent: 3523345 (1970-08-01), Hughes
patent: 3699210 (1972-10-01), Binning et al.

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