Patent ID: 7550185
Filing Date: 2009-06-23
Classification: A61L,B29C,B32B,C08L,Y10T

Abstract:
1. A multiple layered non-PVC containing tubing comprising: an outer layer of a polymer blend of: (a) from about 20% to about 55% by weight of the outer layer of a first polyolefin and (b) from about 45% to about 80% by weight of the outer layer of a first thermoplastic elastomer; a core layer attached to the outer layer, the core layer being a polymer blend of: (a) from about 50% to about 90% by weight of the core layer of a second thermoplastic elastomer and (b) from about 10% to about 50% by weight of the core layer of a second polyolefin; and an inner layer attached to the core layer on a side opposite of the outer layer, the inner layer being a polymer blend of: (a) from about 25% to about 55% by weight of the inner layer of a third polyolefin, (b) from about 0 to about 50% by weight of the inner layer of a fourth polyolefin selected from the group consisting of ethylene copolymers, ultra-low density polyethylene, polybutene, and butene ethylene copolymers; (c) from about 15% to about 40% by weight of the inner 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 12%-50% by weight of the copolymer, ethylene methyl acrylate copolymers with methyl acrylate comonomer content from 12%-40% by weight of the copolymer, ethylene vinyl alcohol with vinyl alcohol comonomer content from 12%-70% by mole percent of the copolymer; and (d) from about 15% to about 40% by weight of the inner layer of a styrene and hydrocarbon copolymer.