CONTINUOUS PROCESS FOR THE PREPARATION OF ACRYLIC FILAMENTS AND FIBRES WITH IMPROVED DYABILITY AND MECHANICAL CHARACTERISTICS.

摘要

We claim: 1. Process for producing fibres through dry or wet spinning of solutions of acrylonitrile polymers containing at least 80/0 by weight of acrylonitrile polymer in a solvent of the polymer, said fibres showing improved chemical-physical and textile properties as well as an excellent uniform dyability and little brittleness, characterized in that the filaments coming out of the coagulating medium and containing at least 10/ by weight of solvent, are stretched with draw ratio of 3.50 and are then made to shrink by a value comprised between 25/0 and 45/0, while they constantly have a solvent content higher than 1070 by weight and that they are finally washed and dried.