Patent ID: 7799418

Claim:
A multilayer coextruded film comprising: a first skin film layer comprising at least one polyolefin polymer; a first outer core layer comprising about 67% by weight of calcium carbonate, about 26% by weight of at least one styrene-based elastomer, and about 7% by weight of a metallocene-catalyzed alpha olefin polymer; an inner core layer formed from a calcium carbonate neutralizer and at least one styrene-based film-forming elastomer, the inner core layer being free of metallocene-catalyzed polymer; a second outer core layer comprising about 67% by weight of calcium carbonate, about 26% by weight of at least one styrene-based elastomer, and about 7% by weight of a metallocene-catalyzed alpha olefin polymer; and a second skin layer comprising at least one polyolefin polymer, wherein said inner core layer is situated between said first and second outer core layers and has a composition that differs from said first and second outer core layers, and wherein said first and second outer core layers are situated between said first and second skin film layers; wherein the inner core layer comprises a higher content of elastomer than either of the first or second outer core layers; and wherein the film is elastomeric and breathable.