Abstract: The invention relates to dry-spun acrylic fibers and filaments having deniers of from 20 to 80 dtex and a strength of at least 1.5 cN/dtex; as well as to a process for their production.

Abstract: The invention relates to a process for the production of polyacrylonitrile tows containing from 7 - 15 % by weight, preferably from 10 - 12 % by weight, of comonomer components from which it is possible to produce yarns having low boiling-induced shrinkage values and yarns and dimensionally stable made-up articles with improved textile properties which comprises reducing the tow-shrinkage emanating from the spinning and stretching process by 80 - 95 % of the original tow shrinkage by heat-fixing and eliminating subsequently the residual shrinkage by fixing with saturated steam.

Abstract: This invention relates to copolymers of acrylonitrile and vinylidene chloride containing at least 55 % by weight of acrylonitrile and at most 45 % by weight of vinylidene chloride of the kind used for the production of substantially non-flammable textile filaments, which copolymers are distinguished by their outstanding whiteness and high softening temperatures which enable homogeneous spinning solutions particularly suitable for spinning to be prepared. This invention also relates to a process for the production of these copolymers.