Foamed polyamide fibers

Details Foamed polyamide fibers Foamed polyamide fibers

1984-12-07

1985-10-01

McCamish, Marion E.

Stock material or miscellaneous articles

Pile or nap type surface or component

Particular shape or structure of pile

264 54, 428 97, 428398, 428401, D02G 300

Patent

active

045445940

ABSTRACT:
A molten polymer containing a blowing agent and, usually, a nucleating agent, is spun into fibers with screen packs or equivalent structures upstream of the spinning apertures. The use of screen packs enables the production of fibers with finer bubbles, which are therefore susceptable to greater melt-drawdown and post-drawing and can have better tensile properties. Foamed polyamide fibers are produced with average bubble diameters one-twentieth or less, compared to the effective fiber diameter.

REFERENCES:
patent: 4407889 (1983-10-01), Gintis et al.
patent: 4425393 (1984-01-01), Benedyk et al.

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