Process for the production of spontaneously crimping polyacrylon

Details Process for the production of spontaneously crimping polyacrylon Process for the production of spontaneously crimping polyacrylon

1974-09-30

1977-03-22

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

With crimping or crinkling of strands of filaments

264171, 264210F, 264206, D01D 522

Patent

active

040137538

ABSTRACT:
The invention relates to a process for the production of spontaneously crimping composite fibres of acrylonitrile polymers wherein the dry-spun-filaments which still contain solvent are stretched to at least three times their original length in a bath of hot water which contains from 12 to 30 % by weight of dimethyl formamide. The stretching operation may be carried out in one or two stages.

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patent: 3828014 (1974-08-01), Wieden et al.

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