Composite bearing material and method of making the same
AssigneeOiles Industry Co., Ltd.
InventorsHideo Cho, Yukinori Takenoshita, Saisuke Sugimoto
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Abstract
In a composite bearing material including a metal strip, a porous sintered metal matrix layer bonded to a surface of said metal strip and a resin composition impregnated into and substantially filling the voids in said porous metal layer and forming a continuous surface layer thereon, the resin composition consists essentially of a blend of 60 to 95 percent by weight of polytetrafluoroethylene and 40 to 5 percent by weight of a copolymer of tetrafluoroethylene and hexafluoropropylene, and mostly all of the copolymer in the composition is included in the surface layer in the form of a fibrillated network.
Claims12
In a composite bearing material including a metal strip, a porous sintered metal matrix layer bonded to a surface of said metal strip and a resin composition impregnated into and substantially filling the voids in said porous metal layer and forming a continuous surface layer thereon;
- the improvement which comprises:
- said resin composition consists essentially of a blend of 60 to 95 percent by weight of polytetrafluoroethylene and 40 to 5 percent by weight of a copolymer of tetrafluoroethylene and hexafluoropropylene, and mostly all of the copolymer in said composition is included in the surface layer in the form of a fibrillated network.
In a composite bearing material including a metal strip, a porous sintered metal matrix layer bonded to a surface of said metal strip and a thin resin layer formed by impregnating and pressing a resin composition into the pores of said porous metal layer and followed by sintering the thus pressed resin composition in a heating furnace;
- the improvement which comprises:
- said resin composition comprises a uniform blend of 60 to 95 percent by weight of a polytetrafluoroethylene having an average particle size less than the average pore size of the voids in said porous metal layer and complementally therewith 40 to 5 percent by weight of a hexafluoropropylene-tetrafluoroethylene copolymer having an average particle size more than the average pore size in said porous metal layer.
Dependencies are inferred from the claim text.