Patent ID: 7192636
Filing Date: 2007-03-20
Classification: B29C,B29K,B32B,C08L,Y10S,Y10T

Abstract:
1. A five layer shrink film comprising: a first outer polyethylenic layer; a second outer polyethylenic layer; a core polystyrenic layer comprising from 70% to 75% by weight styrene homopolymer or α-methylstyrene homopolymer, from 10% to 15% by weight polystyrene toughener, from 10% to 20% by weight adhesive resin, and from 5% to 6% by weight slip additive; a first polystyrene compatibilizing layer between the core polystyrenic layer and the first outer polyethylenic layer; and a second polystyrene compatibilizing layer between the core polystyrenic layer and the second outer polyethylenic layer; wherein the polystyrene compatabilizing layers comprise less than 1% by weight substantially random interpolymer.