POLYPROPYLENE MATERIALS AND METHOD OF PREPARING POLYPROPYLENE MATERIALS

摘要

A polypropylene material is prepared from a blend of polypropylene impact copolymer and high crystallinity polypropylene having less than 2 percent xylene solubles. The material is prepared by blending the polymers while they are in a molten state, and forming a film or sheet from the polymer blend. The material has particular application to forming slit film tapes and similar materials. The resultant materials exhibit increased tenacity, elongation and toughness and less shrinkage as compared to those materials prepared solely from propylene homopolymers. The materials also have a better overall balance of physical properties than other blends for certain applications.