Patent ID: 6368545
Filing Date: 2002-04-09
Classification: B29C,B29K

Abstract:
A process for improving the clarity of multilayer blown films comprising:selecting a first polyolefin from the group consisting of LLDPE, MDPE, and LDPE; selecting a second polyolefin, wherein said second polyolefin is the same as or different from the first polyolefin; and extruding said first and said second polyolefins from a die, wherein the first polyolefin forms a first and a second skin layer, wherein said second polyolefin forms a core layer, wherein said core layer is extruded at least 30Â° C. higher in melt temperature than said first polyolefin, wherein the multilayer film has a haze as determined by ASTM D-1003 at least 40% lower than a multilayer film extruded with the skin and core layers extruded at substantially the same melt temperature.