Cohesive bonding process for forming a laminate of a wear resist

Details Cohesive bonding process for forming a laminate of a wear resist Cohesive bonding process for forming a laminate of a wear resist

1989-02-03

1990-05-08

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

4289088, 49441, B32B 2732

Patent

active

049237594

ABSTRACT:
A polymer laminate produced by crosshead extrusion suitable for wear resistant applications such as a vehicle glass run channel comprises a layer of a weather resistant rubber such as an ethylene-propylenediene (EPDM) rubber and a layer of a wear resistant thermoplastic such as polypropylene. The laminate is passed through an oven at an elevated temperature sufficient to cure the EPDM rubber, for example, at about 375.degree. F., with ambient temperature cooling fluid being blown over the exposed surface of the polypropylene thermoplastic. 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 polypropylene 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 form a glass run channel.

REFERENCES:
patent: 3624964 (1971-12-01), Bordner et al.
patent: 3659983 (1972-05-01), McLain et al.
patent: 3918206 (1975-11-01), Dochnahl
patent: 4104098 (1978-08-01), Hush et al.
patent: 4296062 (1981-10-01), Gauchel et al.
patent: 4538380 (1985-09-01), Colliander

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