Process for producing antipilling acrylic synthetic fiber

Details Process for producing antipilling acrylic synthetic fiber Process for producing antipilling acrylic synthetic fiber

1982-01-12

1984-05-08

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642107, 2642108, D01F 618

Patent

active

044473842

ABSTRACT:
An acrylic fiber produced by the dry-spinning process having, as characteristic properties, a tensile strength of 1.2-2.5 g/denier, a knot strength (g/denier)-knot elongation (%) product of 25 or less and a boiling water shrinkage rate of 5% or less. Said fiber can be obtained by dry-spinning a spinning solution of acrylonitrile type polymer containing 85% by weight or more of acrylonitrile, stretching the resulting fiber in hot water at a stretch ratio ranging from 1 to 2, subjecting the stretched fiber to a drying and relaxing to give the fiber a shrinkage of 10-40% and then stretching it at a stretch ratio of 1.2-2.3 at a temperature of 180.degree.-210.degree. C.

REFERENCES:
patent: 3097415 (1963-07-01), Davis
patent: 3404204 (1968-10-01), Nakagawa et al.
patent: 3560603 (1971-02-01), Ryan
patent: 3878178 (1975-04-01), Guinn et al.
patent: 3976737 (1976-08-01), Sekiguchi et al.
patent: 4205037 (1980-05-01), Fujimatsu
patent: 4383086 (1983-05-01), Fester et al.

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