Patent ID: 7329445

Claim:
A multiple layered non-PVC containing tubing structure comprising: an outermost first layer of a polymer blend of (a) from about 25% to about 50% by weight of the first layer a first polyolefin selected from the group consisting of polypropylene and polypropylene copolymers, (b) from about 5% to about 40% by weight of the first layer a second polyolefin of an α-olefin containing polymer; (c) from about 10% to about 40% by weight of the first layer of a radio frequency susceptible polymer selected from the group consisting of polyamides, ethylene acrylic acid copolymers, ethylene methacrylic acid copolymers, polyimides, polyurethanes, polyesters, polyureas, ethylene vinyl acetate copolymers with a vinyl acetate comonomer content from 18-50% by weight of the copolymer, ethylene methyl acrylate copolymers with methyl acrylate comonomer content from 18%-40% by weight of the copolymer, ethylene vinyl alcohol with vinyl alcohol comonomer content from 15%-70% by mole percent of the copolymer; (d) from about 10% to about 40% of a first thermoplastic elastomer; and a solution contact second layer of a non-PVC containing material of a multiple component polymer blend, the second layer in direct and intimate contact with the first layer.