POLYKETONE YARN AND A METHOD OF MANUFACTURING SAME

摘要

The invention relates to polyketone yarns of which the maximum tangential modulus at an elongation of more than 0,2 % is at least 10 N/tex which display both high strength and, if so desired, a high elongation at break. The quality number, which is measured on a single filament out of a bundle of at least about 30 filaments spun simultaneously through one spinneret and given as Ÿg(s,e), is higher than 85, preferably higher than 100. The quality number of a yarn spun through one spinneret of one or more holes is higher thant 110, preferrably higher than 120. The yarns are manufactured by extruding a solution of a linear polymer of alternating ethylene and carbon monoxide units in a resorcinol-containing solvent, after which the solvent is removed with the aid of methanol as coagulant.