METHOD FOR EXTRUSION OF MULTI-LAYER COATED ELONGATE MEMBER

摘要

A method of making a multi-layer insulated elongate member is disclosed. The method includes providing an elongate member and tube extruding a first thermoplastic material onto an outer surface of the elongate member to create a first layer having a thickness less than or equal to 0.064 mm (0.0025 inch) using a first extruder apparatus. The method further includes using a second extruder apparatus for pressure extruding a compound comprising a second thermoplastic material different from the first thermoplastic material onto an outer surface of the first layer to create a second layer. The second layer fully wets the first layer and the flow point of the first thermoplastic material is at least 30° C. greater than the extrusion melt temperature of the second thermoplastic material.