Patent ID: 6652942
Filing Date: 2003-11-25
Classification: B32B,B60C,Y10T

Abstract:
A multiple layered non-PVC containing tubing structure comprising:a first layer of a polymer blend of: (a) from about 30% to about 50% by weight of the first layer a first polyolefin selected from the group consisting of a first propylene containing polymer, (b) an amount from about 0% to about 50% by weight of the first layer a second polyolefin of an &agr;-olefin containing polymer; (c) an amount from about 0% 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; and (d) an amount from about 0% to about 40% of a first thermoplastic elastomer; and a second layer of a non-PVC containing material of a multiple component polymer blend of from about 25% to about 55% by weight of a second thermoplastic elastomer, from about 20% to about 45% of a polyester polyether block copolymer, an amount from about 0% to about 15% ethylene copolymerized with vinyl lower alkyl esters, from about 0% to about 10% of a second propylene containing polymer and from about 0% to about 35% of a component selected from the group consisting of acrylonitrile butadiene styrene block copolymers, styrene ethylene butene copolymers, styrene acrylonitrile copolymers, cyclic olefin containing polymers and bridged polycylic olefin containing polymers.