Patent ID: 8609772

Claim:
A film comprising: a) at least 80 wt % of a propylene-based polymer having: i) 60 wt % or more units derived from propylene, and ii) crystallinity of from 0.25% to 40%, resulting from isotactically arranged propylene-derived sequences; b) between 0.1 wt % and 20 wt % of a hydrocarbon resin having a glass transition temperature greater than 20° C.; and c) between 0.1 wt % and 20 wt % of a polyethylene homopolymer or polyethylene which is an ethylene copolymer additive having a crystallinity greater than the crystallinity of the propylene-based polymer and a weight average molecular weight, Mw, of from about 186,000 g/mol to about 290,000 g/mol; wherein i) the film has a tension set, after a 100% extension in the transverse direction, less than 5% greater than that of a film formed from the propylene-based polymer alone, and ii) at least one of the film tensile strength and the film tear strength is at least 10% greater than that of a film formed from the propylene-based polymer alone.