Process for the production of high-shrinkage wet-spun acrylic fibres or filaments
AssigneeBayer Aktiengesellschaft
InventorsUlrich Reinehr, Alfred Nogaj, Toni Herbertz
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Abstract
The invention relates to a process for the production of high-shrinkage wet-spun acrylic fibres having good fibre strength and high densities by fixing the unstretched fibres with saturated steam and then stretching in a ratio of from 1:3,5 to 1:5.
Claims5
A process for the production of high-shrinkage filaments and fibres of an acrylonitrile polymer or copolymer containing at least 50% by weight of polymerised acrylonitrile and the balance of one or more monomers copolymerizable therewith which comprises fixing the undrawn wet-spun material with saturated steam at a temperature of from 110.degree. to 180.degree. C for at least one minute and then drawing in a ratio of from 1:3.5 to 1:5.0.
Dependencies are inferred from the claim text.