Patent ID: 8057910

Claim:
A multilayer structure comprising A. at least one low haze polymeric film layer having a thickness of up to 25 mil that is high-frequency weldable and optically clear, wherein the composition of said low haze polymeric film layer is a polymeric blend composition consisting of 1. a first ethylene copolymer prepared by high pressure free radical copolymerization and consisting essentially of copolymerized units of ethylene and 3-15 weight % copolymerized units of a comonomer selected from the group consisting of maleic anhydride, maleic acid monoesters, maleic acid diesters, fumaric acid monoesters, itaconic acid monoesters and mixtures thereof, said first ethylene copolymer being present in the polymeric blend composition in an amount of from about 5 to about 95 weight % of the polymeric blend composition; and 2. at least one second ethylene copolymer, different from said first ethylene copolymer, consisting essentially of copolymerized units of ethylene and copolymerized units of a polar comonomer selected from the group consisting of vinyl acetate, alkyl acrylates, alkyl methacrylates, carbon monoxide and mixtures of two or more thereof, wherein said polar comonomer is present in the second ethylene copolymer in an amount of from 6 to 40 weight %, the second ethylene copolymer being present in the polymeric blend composition in an amount from about 5 to about 95 weight % of the polymeric blend composition; wherein the haze value of the low haze polymeric film layer is 11 or less; and B. at least one additional layer comprising a substrate selected from the group consisting of thermoplastic sheets, cellular foams, woven and non-woven fabrics, textiles, foils, paperboard products, leather and leather-like products, wood veneer and wood products, and wood and cellulosic composites.