Patent ID: 6531019
Filing Date: 2003-03-11
Classification: B29C,C23C,Y10T

Abstract:
A method of fabricating a multiple coat metal pipe,wherein a first layer comprising a resin having an adhesive force is extruded on a surface treatment layer provided on an outer peripheral face of a metal pipe and a second layer comprising a resin having a chipping resistance is extruded on an outer peripheral face of the first layer providing a coating on the first layer in a substantially non-adhesive state such that a peel off strength between the first layer and a second layer is 75 g/cm or less whereby the peel off strength enables the second layer to be peeled off from the first layer without peeling off the first layer; and wherein the first layer has a first dissolving performance and the second layer has a second dissolving performance different from the first dissolving performance and the second layer is extruded at a temperature equal to or higher than a melting point of the first layer.