PROCESS FOR PREPARING POLYKETONE FIBRES

摘要

The invention pertains to a process for preparing thermoplastic fibres by melt-spinning an alternating co-polymer composed of alkenes and carbon monoxide in which the polymer is heated to a temperature of at least TNF+5 DEG C, with TNF being the temperature at which the molten polymer is free of crystallisation nuclei, and where the residence time of the polymer at a single temperature or different temperatures above the polymer melting point satisfies (I), wherein tn is the residence time (in minutes) of the polymer at a temperature Tn (in K, with Tn > Tm) and A and B are determined by measuring the viscosity of the polymer at different temperatures and residence times.