| abstract |
fiber, extensible fiber, extendable nonwoven fabric, extendable lamination and personal care product, extendable nonwoven article. fibers exhibiting good elasticity or extensibility and toughness, a low modulus, are prepared from propylene-based copolymers. propylene-based copolymers comprise at least 50 weight percent (% w / w) of propylene derived units and at least about 8% w / w of units derived from one or more comonomers other than propylene, e.g. Particularly preferred ethylene. propylene polymers are characterized by having nmr peaks of c133 corresponding to a mean error of about 14.6 and about 15.7 ppm, the peaks being of approximately equal intensity. In one aspect of the invention fibers are subjected to stress-induced crystallization by subjecting the fiber to tensile elongation during excretion. |