Method for washing acrylic filaments

Details Method for washing acrylic filaments Method for washing acrylic filaments

1974-11-26

1976-06-08

Lieberman, Allan

Bleaching and dyeing; fluid treatment and chemical modification

Cleaning or laundering

Removing formation impurities from artifical fiber

264 38, 264182, D01F 618, D06L 316, D06M 318, D06M 320

Patent

active

039618900

ABSTRACT:
An improved method for washing acrylic filaments in which the acrylic filaments are produced by wet-spinning a solution of an acrylic polymer in dimethylacetamide, and are coagulated, and if desired stretched, and are then finally washed with an aqueous wash solution containing an alkaline agent, wherein the aqueous wash solution contains acetic acid in a quantity between 0.0050% and 0.1% and dimethylamine in such a quantity that the dimethylamine/acetic acid molar ratio is greater than 0.2, and preferably between 0.4 and 0.8.

REFERENCES:
patent: 3318983 (1967-05-01), Hovis et al.
patent: 3558765 (1971-01-01), Bruner et al.

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