Patent ID: 6969556

Claim:
An oriented polymeric film comprising at least one (a) layer comprising (a) a first material which is very highly crystalline polypropylene homopolymer (VHCPP) having a very high intermolecular stereoregularity consisting of at least about 98% of isotactic polymer the remainder of the material (if any) being atactic polymer; together with (b) a second material comprising i) at least one polymer having a ring and ball softening point from 110Â° C. to 170Â° C. and/or a nucleating agent; and/or ii) at least two second materials comprising hydrogenated hydrocarbon resin(s) of different types and/or nucleating agent(s), where the second material is added in an amount sufficient for the film to exhibit two or more of the following properties measured in any direction parallel to the film surface and where necessary normalized for a 20 micron thick film: WVTR less than about 6 g/24 hours/m 2 ; OTR less than about 1,500 cm 3 /24 hours/m 2 ; Young's modulus from 4000 MPa to 5000 MPa, Flexural modulus from 0.4 N(mm) 2 to 0.7 N (mm) 2 ; haze less than about 1.1%; and/or a clarity greater than 97%.