Carbon deposit friction lining material
AssigneeBorg-Warner Automotive, Inc.
InventorsRobert C. Lam, Yih-Fang Chen
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Abstract
The present invention relates to a friction material comprising a fibrous base material primary layer of less fibrillated aramid fibers, synthetic graphite and at least one filler material, and a secondary layer of a mixture of carbon particles and at least one retention aid coated on at least one surface of the primary layer. In certain embodiments, the fibrous base material is impregnated with a phenolic or phenolic-based resin material, including, for example, a mixture of a phenolic resin and a silicone resin to form a friction material having high heat resistance and high friction durability characteristics.
Claims19
A process for producing non-asbestos friction material comprising coating at least one surface of a fibrous base material which comprises less fibrillated aramid fibers having a freeness about 300-700 on the Canadian Standard Freeness index, with a mixture of carbon particles and at least one retention aid, wherein the carbon particles cover about 3 to about 90% of the surface of the fibrous base material, impregnating the carbon particle coated fibrous base material with at least one phenolic resin or modified phenolic resin, and thereafter curing the impregnated fibrous base material at a predetermined temperature for a predetermined period of time.
Dependencies are inferred from the claim text.