Inventors:
Andy C. Chang - Houston TX, US
Hong Peng - Lake Jackson TX, US
Jozef J. I. Van Dun - Bellaire TX, US
Randy E. Pepper - Lake Jackson TX, US
Edward N. Knickerbocker - Lake Jackson TX, US
Antonios K. Doufas - Lake Jackson TX, US
Rajen M. Patel - Lake Jackson TX, US
Lizhi Liu - Lake Jackson TX, US
Byron P. Day - Canton GA, US
Stephen M. Englebert - Woodstock GA, US
Joy F. Jordan - Marietta GA, US
Renette E. Richard - Dunwoody GA, US
Christian L. Sanders - Decatur GA, US
Varunesh Sharma - Atlanta GA, US
Assignee:
Dow Global Technologies Inc. - Midland MI
International Classification:
D01F 6/00
Abstract:
Fibers that exhibit good elasticity or extensibility and tenacity, and low modulus are prepared from propylene-based copolymers. The propylene-based copolymers comprise at least about 50 weight percent (wt %) of units derived from propylene and at least about 8 wt % of units derived from one or more comonomers other than propylene, e. g. , ethylene. Particularly preferred propylene copolymers are characterized as having C NMR peaks corresponding to a regio-error at about 14. 6 and about 15. 7 ppm, the peaks of about equal intensity. In one aspect of the invention, fibers are subjected to stress-induced crystallization by subjecting the fiber to tensile elongation during draw.