Process for producing filaments and fibers of acrylic polymers w

Details Process for producing filaments and fibers of acrylic polymers w Process for producing filaments and fibers of acrylic polymers w

1990-03-08

1991-03-05

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264182, 264206, D01F 618

Patent

active

049976109

ABSTRACT:
A fiber or filament of a swellable polymer of high tensile strength is made by spinning a polymeric raw material which is produced by agitating a suspension of solid particles of an acrylonitrile polymer in dilute sulfuric acid having an acid concentration between 40 to 50 percent by weight until the polymer is hydrolyzed to an extent that it contains from 10 to 30 percent by weight of carboxyl groups such that sticking of individual particles of the polymer to one another is avoided.

REFERENCES:
patent: 2721113 (1955-10-01), Downing et al.
patent: 2806010 (1957-09-01), Wheatley et al.
patent: 3458060 (1976-01-01), Reinehr et al.
patent: 3733386 (1973-05-01), Shimoda et al.
patent: 4143200 (1979-03-01), Radlmann et al.

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