Patent ID: 6528137
Filing Date: 2003-03-04
Classification: F16L,Y10T

Abstract:
A plastic pipe, comprising:a circumferential structure, in the circumferential structure, at least one structure of elongated segments of polymer (A) prepared from a polymeric material selected from the group consisting of aromatic polyamide, a thermoplastic polyester, a fluoropolymer, ethylene/vinyl alcohol copolymer, a polyolefin, a polyketone and a polyacetal, said segments exhibit a barrier effect against permeation of a fluid medium which is carried through the pipe, the arc lengths of the segments being greater than widths of the segments and arc lengths of the segments being the same or different, embedded in a matrix of sheathing polymer (B) prepared from a polymer material selected from the group consisting of polyamides, polyolefins and polyketones, which segments are spaced apart from each other by intervening fillets of sheathing polymer (B), wherein the thickness of each barrier segment is less than 50% of the total wall thickness.