Patent ID: 6302153
Filing Date: 2001-10-16
Classification: F16L,Y10S

Abstract:
A multilayer tube based on polyamides, comprising, in its radial direction, from the inside to the outside:an inner layer formed from a polyamide or a polyamide/polyolefin blend having a polyamide matrix, said inner layer containing a dispersed electrically conductive carbon black filler, producing a surface resistivity of less than 10.sup.6 .OMEGA./.quadrature.,an intermediate layer in contact with said inner layer, said intermediate layer being formed from a polyamide/polyolefin blend having a polyamide matrix, said intermediate layer not containing electrically conductive carbon black or an electrically significant amount of said carbon black,a binder layer, anda polyamide outer layer,the above layers adhering to each other in their respective contact region.