Abstract: A resin composition which exhibits good sealability while keeping creep deformation to a minimum when brought into sliding contact with a mating member at a high contact pressure of over 10 MPa, and which will not damage a mating member made from an aluminum alloy while sliding in contact with lubricating oil. The resin composition is a pressure-resistant, sliding tetrafluoroethylene resin composition containing 100 parts by volume of a modified tetrafluoroethylene resin in the form of a copolymer of tetrafluoroethylene and partially modified tetrafluoroethylene, 5-40 parts by volume of carbon fiber, and 2-30 parts by volume of calcium sulfate whiskers having a Mohs hardness of 4 or less, and having, at 100° C., a maximum deformation rate in 24 hours, of 15% or less. A seal device to be brought into slide contact with an aluminum metal is molded from such a pressure-resistant, sliding tetrafluoroethylene resin composition.

Abstract: A polyimide resin composition for sliding members which has high heat resistance and sliding properties and excels in wear resistance under sliding conditions at high PV values and which can keep low the rate of shrinkage due to crystallization treatment. The composition is made up of 100 parts by weight of resin composition comprising 50-90% by weight of a thermoplastic polyimide resin and 50-10% by weight of graphite obtained by graphitizing a non-phenolic resin material and containing 97% or more of fixed carbon; 5-20 parts by weight of tetrafluoroethylene resin; and 5-30 parts by weight of a powdery hardened phenolic resin.

Abstract: A rubber composition having low friction is proposed which contains a thermoplastic fluororesin, a thermosetting fluororubber and a low-molecular weight fluorine-containing polymer.

Abstract: An improved cleaning blade for a photoelectronic copying machine. It has a sharp, resilient edge and is superior in wear resistance, and lubricating and cleaning properties. The substrate of the cleaning blade is urethane rubber and is coated with perfluoropolyether having a main structural unit represented by --C.sub.x F.sub.2x --O-- (x is 1, 2, 3 or 4) and having an isocyanate, hydroxyl, carboxyl or amino group at least at one end thereof. It may be coated with a mixture of the perfluoropolyether and an isocyanate group or a hydroxyl group.