Patent ID: 6548628
Filing Date: 2003-04-15
Classification: B29D,B29K,B32B,C08J,C08L,Y10T

Abstract:
A process for producing a film or a layer comprising the steps of:a) providing at least one polyolefin molding composition with a particle size of from 20 to 5,000 &mgr;m, b) optionally, compounding the at least one polyolefin composition with at least one additive to form a resultant mixture, c) melting the resultant mixture at a temperature of from 150 to 300Â° C. to form a molten material, and d) cooling and shaping the molten material to form the film or layer, whereinthe polyolefin molding composition comprises at least one polyolefin derived from at least one olefin having at least 2 carbon atoms, of the formula Raâ€”CH&boxH;CHâ€”Rb, in which Ra and Rb are identical or different and are a hydrogen atom or a straight-chain or branched C1-C15 alkyl radical, or Ra and Rb together with the atoms connecting them, form ring system, and the at least one polyolefin is essentially isotactic and has been prepared by means of a metallocene catalyst and wherein the at least one polyolefin molding composition has a molar mass of from 120,000 to 500,000 g/mol.