Patent ID: 6905568
Filing Date: 2005-06-14
Classification: B32B,Y10T

Abstract:
1. A process for reducing the haze of sheet-like extrusions of clear polymeric blends attributable to rough surface of the extrudate comprising: (A) coextruding (B) assembling, while the layers are molten, the first outer layer to a first surface of the at least one core layer and the second outer layer to a second surface of the at least one core layer and (C) cooling the assembled layers to a temperature below molten temperature, wherein the first polymer is a styrene-butadiene copolymer; wherein the second polymer is a styrene-methyl methacrylate polymer; wherein the core layer comprises at least 20 weight % of the second polymer; wherein the first outer layer is a styrene-butadiene copolymer; wherein the second outer layer is a styrene-butadiene copolymer; and wherein the first outer layer, second outer layer and core layer after assembly have a haze that is at least 23.7% less than the core layer alone.