HYDROCARBON/CO-SOLVENT SPIN LIQUIDS FOR FLASH-SPINNING POLYMERIC PLEXIFILAMENTS

摘要

An improved process is provided for flash-spinning plexifilamentary film- fibril strands of a fiber-forming polyolefin from a C4-7 hydrocarbon/co-solvent spin liquid that, if released to the atmospher e, presents a greatly reduced ozone depletion ha- zard, as compared to the halocarbon spin liquids currently-used commercially for making such strands. The resulting plexi- filamentary film-fibril strands have increased tenacity and improved fibrillation compared to strands flash-spun from 100 % hydrocarbon spin liquids.