MANUFACTURE OF ABRASION RESISTANT COMPOSITE EXTRUSIONS

摘要

Methods for forming a composite extrusion for use as a glass run channel in an automobile and the products formed thereby are disclosed in which a main bod y member (2) is formed from an elastomeric thermoset rubber and an abrasion resistant layer (4) comprised of a crosslinkable thermoplastic or a high ethylene content EPDM rubber extruded thereon. The crosslinkable thermoplast ic may be a moisture crosslinkable polyethylene containing grafted silane functional groups. The abrasion resistant layer (4) may be extruded onto the thermoset either prior to or after the thermoset (2) is cured and either pri or to or after the abrasion resistant layer (4) is crosslinked. The material of the abrasion resistant layer (4) may be extruded into tape form and laminate d onto the main body member (2).