Patent ID: 8796383

Claim:
A film or a cap layer of co-extruded films comprising: a modified olefin based polymer comprising polypropylene, a reactive modifier comprising a functionalized polyolefin, and from 1 wt. % to 30 wt. % polylactic acid (PLA), wherein the modified olefin based polymer exhibits a seal initiation temperature (SIT) that is at least 5° C. less than a seal initiation temperature of the polypropylene absent the PLA and a hot tack range of at least 20° C.; wherein the polypropylene is a random copolymer comprising between about 0.5 wt % to about 5.0 wt % comonomer relative to the total weight of the copolymer; and wherein the reactive modifier is formed by grafting in the presence of an initiator and a modifier, wherein the modifier comprises polyethylene glycol diacrylate, trimethylolpropane triacrylate, alkloxylated hexanediol diacrylate, or trimethylolpropane triacrylate esters.