Process for dyeing undrawn acrylonitrile polymer filaments

Details Process for dyeing undrawn acrylonitrile polymer filaments Process for dyeing undrawn acrylonitrile polymer filaments

1973-10-17

1976-01-13

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With incorporating dye susceptible material or dyeing workpiece

264203, 264206, D01F 618

Patent

active

039325717

ABSTRACT:
Process for dyeing substantially undrawn dry-spun filaments of acrylonitrile polymer which comprises extracting spinning solvent from moistened dry-spun filaments of acrylonitrile polymer to below 10% by weight of the filaments and at below 80.degree.C., dyeing the extracted filaments in a dye bath at below 80.degree.C. by initially contacting the filaments with the dye at nearly zero stretch, followed by stretching the filaments from 1.5.times. to 4.5.times. at between 60.degree. - 80.degree.C. while still contacting the dye solution.

REFERENCES:
patent: 3124631 (1964-03-01), Davis et al.
patent: 3433861 (1969-03-01), Hamilton

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