Patent ID: 7179521

Claim:
A five layer shrink film for high speed packaging lines having a modulus of 50,000 psi or higher and a haze value less than 5.0 comprising: a first outer layer comprising by total weight of the layer, 60% or more by weight polyethylenic polymer that has been formulated for use as outer layers in high speed packaging shrink film and further comprises 5% to 15% by weight softening olefin and 10% to 30% by weight cyclic-olefin copolymers; a second outer layer comprising by total weight of the layer, 60% or more by weight polyethylenic polymer that has been formulated for use as outer layers in high speed packaging shrink film and further comprises 5% to 15% by weight softening olefin and 10% to 30% by weight cyclic-olefin copolymers; a core cyclic-olefin copolymer containing layer; a first cyclic-olefin copolymer containing intennediate layer between the core layer and the first outer layer; and a second cyclic-olefin copolymer containing intermediate layer between the core layer and the second outer layer; wherein the polyethylenic polymer comprises linear low density polyethylene copolymer; wherein the cyclic-olefin copolymer of the five layer shrink film is a single-site catalyzed cyclic-olefin copolymer; wherein softening olefin copolymer comprises by total weight of the five layer shrink film from 2% to 25%; wherein the cyclic olefin copolymer comprises by total weight of the five layer shrink film from 10% to 30%; and wherein the five layer shrink film comprises less than 1% by weight polystyrene and less than 1% by eight polypropylene.