B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
18/783
B32B 25/08 (2006.01) B60J 1/16 (2006.01) B60J 10/00 (2006.01) B60J 10/06 (2006.01)
Patent
CA 1324868
ABSTRACT A polymer laminate produced by crosshead ex- trusion suitable for wear resistant applications such as a vehicle glass run channel comprises a layer of a weather resistant rubber such as an ethylene-propylene- diene (EPDM) rubber and a layer of a wear resistant thermoplastic such as polypropylene. The laminate is passed through an oven at an elevated temperature suffi- cient to cure the EPDM rubber, for example, at about 375°F, with ambient temperature cooling fluid being blown over the exposed surface of the polypropylene thermoplas- tic. The interior polypropylene surface or interface is heated by the EPDM rubber which is at a high temperature as a result of the heat of extrusion and heat generated by cure thereof. As a result, the polypropylene interior surface or interface melts and causes it to flow and form a mechanical bond with the EPDM rubber while the exposed surface as well as a substantial portion of the polypro- pylene is kept from melting by the cooling fluid. The EPDM rubber can be extruded in the form of a channel having a longitudinal web which supports and is bonded to the laminated polypropylene wear strip to farm a glass run channel.
574921
Brooks Mark L.
Wilson Keith E.
Gencorp Inc.
Smart & Biggar
LandOfFree
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