Patent ID: 6896005
Filing Date: 2005-05-24
Classification: B32B,F16L,Y10S,Y10T

Abstract:
1. An elongated multi-layer tubing for connection to a motor vehicle system to contain and convey fluids containing hydrocarbons, the multi-layer tubing comprising: a first layer disposed radially innermost the first layer having an inner face capable of prolonged exposure to fluids containing hydrocarbons and an outer face spaced a predetermined thickness form the inner surface, the first layer composed of an extrudable melt-processible thermoplastic material; and at least one additional disposed radially outward of the first layer and in overlying relationship thereto, said at least one additional layer composed of an extrudable melt-processible thermoplastic material and connected to the first layer in an essentially permanent manner wherein the melt-processible thermoplastic material of at least one additional layer contains or at least one of copolymers of substituted alkenes and vinyl alcohol, copolyrners of unsubstituted alkenes and vinyl alcohol, copolymers of substituted alkenes and vinyl acetate and copolymers of unsubstituted alkenes and vinyl acetate and mixtures thereof.