Production of spontaneously crimping dry-spun...

Details Production of spontaneously crimping dry-spun... Production of spontaneously crimping dry-spun...

D - Textiles, Paper

01

F

18/582

D01F 8/00 (2006.01) D01F 8/08 (2006.01)

Patent

CA 1062861

PROCESS FOR THE PRODUCTION OF SPONTANEOUSLY CRIMPING POLYACRYLONITRILE COMPOSITE FIBRES WITH IMPROVED CRIMP PROPERTIES Abstract of the Disclosure 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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