MULTI-LAYER TUBING ASSEMBLY FOR FLUID AND VAPOR HANDLING SYSTEMS

摘要

A multi-layer tubing assembly for use in fuel-line applications. An extruded innermost semi-conductive layer of a fluoroplastic has a surface resistivity in the range of 101 to 106 ohm/sq. An inner permeation-resistant layer of a fluoroplastic is coextruded around the innermost layer at temperatures below 600 degrees Fahrenheit. An adhesive layer of polymer blend coextruded around the inner layer has a multiphase morphology wherein one phase is miscible with the fluoroplastic and another phase is miscible with a rubber-like multiphase polymer. A cover layer of the rubber-like multiphase polymer is coextruded around the adhesive layer.