COMPOSITE POLYOLEFIN FILMS SUITABLE FOR PACKAGING

摘要

Disclosed are composite films comprising: A) a single- or multilayer bioriented film, wherein the single layer or at least one layer of said bioriented film is propylene crystalline homopolymer; and B) a single- or multilayer cast film, wherein the single layer or at least one layer of said cast film is a layer of a composition comprising: I) propylene crystalline homopolymer, or a crystalline copolymer of propylene with ethylene and/or a C4-C8 .alpha.-olefin; II) a copolymer fraction containing propylene and ethylene, insoluble in xylene at ambient temperature; III) a copolymer of ethylene with propylene and/or a C4-C8 .alpha.-olefin and soluble in xylene at ambient temperature.