HIGH STRENGTH HIGH MODULUS POLYOLEFIN COMPOSITE WITH IMPROVED SOLID STATE DRAWABILITY

摘要

A drawn polyolefin laminate having a tensile strength of at least 0.35 GPa, a 1% secant modulus of at least 10.5 GPa and an elongation at break of less than 10%, and comprising a) a core layer of a polymer selected from the group consisting of polypropylene and linear low density polyethylene and on each side thereof; b) a coextruded cap layer of a polymer selected from the group consisting of butene-1 homopolymers and copolymers thereof with ethylene, the laminate having been stretched to a draw ratio of at least 15:1. l