High performance two-ply friction material
AssigneeBorgWarner Inc.
InventorRobert C. Lam
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Abstract
The present invention relates to a two-ply fibrous base material comprising a more porous primary layer having elastic and oil absorbent characteristics bonded to a less porous secondary layer having high temperature resistance and high strength characteristics. The two-ply fibrous base material, when impregnated with a suitable resin, provides a friction material exhibiting good friction and wear characteristics and is especially useful in high energy end use applications.
Claims35
A two-ply fibrous base material for use in a non-asbestos friction material comprising a secondary or top layer bonded to a primary or lower layer, the primary layer comprising non-linearly elastic fibers, cotton fibers, and filler material;
- the secondary layer comprising carbon fibers, aramid fibers, filler material, and novoloid fibers, wherein the primary layer has a porosity which is higher than the secondary layer.
A process for producing a two-ply fibrous base material comprising forming a primary layer comprising non-linearly elastic fibers, cotton fibers and filler material;
- and adhering a secondary layer to the primary layer, the secondary layer comprising carbon fibers, aramid fibers, filler material, and novoloid fibers;
- wherein the primary layer has a porosity which is higher than the secondary layer.
A two-ply fibrous base material for use in a non-asbestos friction material comprising a secondary or top layer bonded to a primary or lower layer, the primary layer comprising non-linearly elastic fibers, cotton fibers, and filler material;
- and wherein the secondary layer comprises, in percent by weight based on the weight of the secondary layer:
- about 5 to about 30% carbon fibers, about 0 to 30% cotton fibers, about 5 to about 45% aramid fibers, about 0 to about 30% graphite, about 0 to about 30% carbon particles, about 5 to about 35% filler material, about 1 to about 10% novoloid fibers, and about 0 to about 3% latex type processing aids.
Dependencies are inferred from the claim text.