Patent ID: 6615877
Filing Date: 2003-09-09
Classification: B32B,F02M,F16L,Y10S

Abstract:
A multilayer tubing forming a motor-vehicle fuel line for conveying a liquid comprising:an outer layer composed of nylon 12; an intermediate layer coextruded with said outer layer and composed of an ethylene-vinyl alcohol copolymer; an electrically conductive inner layer coextruded with said outer and intermediate layer and composed of a nylon selected from the group which consists of nylon 6 and nylon 12 and compounded with an amount effective to render the inner layer electrically conductive and at most 30 percent by weight of at least one conductive substance selected from the group which consists of conductive carbon black and graphite fibrils, said inner layer containing at least 0.1 percent by weight of said conductive substance and sufficient to improve resistance of the nylon of said inner layer to ZnCl2; at least one bond-promoting layer between at least one of said inner and outer layers and said intermediate layer; and outwardly of said intermediate layer, at least one further nylon-containing layer.