Carbon fiber/flame-resistant organic fiber sheet as a friction material
AssigneeRaybestos-Manhattan, Inc.
InventorPhilip A. Chuluda
Life of this patent
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Abstract
Paper base friction material in the form of a porous, flexible interfelted fibrous sheet comprised of a mixture of 25 to 65 percent cellulose fibers, 5 to 20 percent carbon fibers, 5 to 20 percent flame-resistant organic fibers, fillers, and an oil resistant elastomeric sizing. The friction material also includes a synthetic resin binder which may be incorporated during preparation of the sheet or subsequently. In use, the paper base friction material is bonded to a supporting member, preferably metal, whereby it is useful as a friction element particularly in oil, such as in automotive automatic transmissions.
Claims21
Friction material in porous, flexible, interfelted fibrous sheet form comprising a mixture of from about 25 to about 65 percent cellulose fibers, from about 5 to about 20 percent of carbon fibers, from about 5 to about 20 percent of flame-resistant organic fibers, up to about 30 percent of graphite particles, up to about 30 percent of diatomaceous earth particles, and a small amount of a sizing effective to increase the tensile strength of said sheet, said percentages being by weight based on the total weight of said sheet.
A friction element for engaging mechanisms adapted to operate in oil comprising a support member and a friction facing bonded to said support member, said friction facing being in the form of a porous, flexible, interfelted fibrous sheet comprising a mixture of from about 25 to about 65 percent cellulose fibers, from about 5 to about 20 percent of carbon fibers, from about 5 to about 20 percent of flame-resistant organic fibers, up to about 30 percent of graphite particles, up to about 30 percent of diatomaceous earth particles, and a small amount of a sizing effective to increase the tensile strength of said sheet, said percentages being by weight based on the total weight of said sheet, said sheet being impregnated with an amount of a synthetic thermosetting resin such that said sheet has a final porosity of from about 40 percent to about 55 percent after compression in bonding said sheet to said support member.
Dependencies are inferred from the claim text.