Patent ID: 6743523
Filing Date: 2004-06-01
Classification: A61J,A61M,B32B,C08J,C08L,Y10T

Abstract:
A multilayer film formed by a coextrusion process, the film comprising:an outer first layer of a blend of a first component selected from the group consisting of: (1) ethylene and &agr;-olefin copolymers having a density of less than 0.915 g/cc, (2) ethylene copolymerized with C1-C17 alkyl acrylates, (3) ethylene copolymerized with C1-C17 alkyl substituted alkyl acrylates and (4) ionomers, the first component being present in an amount greater than 55% by weight of the blend, a second component in an amount by weight of the blend less than 45% and is selected from the group consisting of: (1) propylene containing polymers, (2) polybutene polymers, (3) polymethylpentene polymers, (4) cyclic olefin containing polymers and (5) bridged polycyclic hydrocarbon containing polymers; a second layer selected from the group consisting of propylene homopolymers, propylene copolymers, ethylene homopolymers, ethylene copolymers, polyesters, copolyesters, polyamides and copolyamides; and, the film is non-oriented has a modulus of elasticity when measured in accordance with ASTM D882 of less than 60,000 psi, an internal haze when measured in accordance with ASTM D1003 of less than about 25%, an internal adhesion ranking of greater than 2 such that the film can be formed into a roll and autoclaved and can be unrolled after autoclaving, a sample creep at 120Â° C. under 27 psi loading of less than or equal to 150% for a film having a thickness of from about 5 mils to about 15 mils, and the film can be heat sealed into a container having seals wherein the seals remain intact when the container is autoclaved at 121Â° C. for one hour.