Patent ID: 8431198
Filing Date: 2013-04-30
Classification: B32B,C08F,C08L,Y10T

Abstract:
1. A multilayer film comprising at least 3 layers, a first outer layer, a second outer layer and, between the first and second outer layers, at least one core layer wherein the first and second outer layers each are from 3 to 18 volume percent of the film and each comprises: at least about 75 weight percent of (a) at least one high impact polystyrene (HIPS) component having: and the at least one core layer comprises from 64 to 94 volume percent of the film and comprises (b) at least about 70 weight percent of at least one styrene block copolymer; and wherein polymers (a), and (b) and optionally (c) at least one general purpose polystyrene (GPPS) having a weight-average molecular weight of more than 200,000 grams per mole and 350,000 grams per mole or less, account for 100 weight percent of the polymers in the film with the exception of optional additives, tie layers or a combination thereof.