MOISTURE CROSSLINKABLE THERMOPLASTICS IN THE MANUFACTURE OF VEHICLE WEATHER STRIPS

摘要

Methods for forming a composite extrusion for use as a vehicle weather strip and the products formed thereby are disclosed in which a main body member (2 ) is formed from an elastomeric thermost rubber and an abrasion resistant decorative layer (4) comprised of a crosslinkable thermoplastic is extruded thereon. The crosslinkable thermoplastic may be an ethylene-octene copolymer or a copolymerized ethylene-styrene interpolymer. The thermoplastic contains grafted silane functional groups to allow the thermoplastic to be crosslinke d in the presence of moisture. The abrasion resistant decorative layer may be extruded onto the thermoset either prior to or after the thermoset is cured and either prior to or after the abrasion resistant decorative layer is crosslinked. The material of the abrasion resistant decorative layer may be extruded into sheet form and laminated onto the main body member.