Anisotropic pipe liner

Abstract

A pipe including an inner layer, an outer layer, a jacket layer, and an anisotropic layer positioned between the jacket and outer layers is provided. The anisotropic layer is formed from weaving a number of more rigid, monofilament fill strands and a number of less rigid multifilament warp strands. The fill strands may be formed from single, six hundred-ten (610) denier polyester filament while the warp strands may be formed from a series of two hundred-twenty (220) denier polyester threads. The anisotropic layer permits limited rotation of the inner and outer pipe layers without inserting into the gaps formed by the jacket layer when exposed to intense heat and pressure and is not subjected to significant creep during use.

Dependencies are inferred from the claim text.