Bonding woven carbon fabric friction materials
US4778548A · kind A · utility
Inventors
Key dates
| Filing date | Jul 24, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 24, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/708
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.