Bonding woven carbon fabric friction materials

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

264 291, 264 294, 264 295, 188251A, 427249, B32B 1800, C01B 3100

Patent

active

047785489

ABSTRACT:
A porous, woven carbon fabric friction material is bonded to a solid substrate, such as a conical transmission synchronizer, with a high temperature thermosetting adhesive, such as a synthetic rubber-phenolic resin base adhesive. Prior to applying the adhesive, a thin layer of one surface of the friction material is removed, such as by contacting the surface with a band-type sander, to break through the pyrolytic carbon coating on the substantial portion of the carbon fibers. The adhesive is applied to the abraded surface of the friction material and/or a roughened surface on the solid substrate, the friction material is clamped to the solid substrate and the thus-assembled parts are heated to at least substantially cure the adhesive. Improved bonds between the adhesive and friction material are produced and a tendency for the adhesive to "bleed through" the pores of the friction material and migrate to the friction surface during curing is significantly reduced.

REFERENCES:
patent: 3193424 (1965-07-01), Scott
patent: 4291794 (1981-09-01), Bauer
patent: 4514240 (1985-04-01), Heraud
patent: 4700823 (1987-10-01), Winckler

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