FIBERS AND FABRICS INCORPORATING LOWER MELTING PROPYLENE POLYMERS

摘要

Propylene homopolymers and copolymers formed by metallocene catalyst system exhibit generally lower melting behaviour than previous propylene polymers. This lower melting behaviour will be of use in the fabrication and use of fibers and fabrics that depen d upon either lower melting behaviour in general or upon a melting point differenti al between two fabrics or fibers to achieve bonding. Suc h fibers are, for instance, chenille or tufted cord, core and sheath. Fabrics such as spunbonded and meltblown, when combined in SM or SMS fabrics will show bonding at lower temperatures with fewer pinholes. Such fa brics may also be bonded by adhesives such as hot melt, water based and extruded polyolefins. Combinations of Ziegler-Natta catalyze d and metallocene catalyzed polymers are contemplated.