초록 ▼

A PTFE-based sliding material, wherein the porous sintered layer on the surface of backing metal is impregnated with baked PTFE, with one or both of the solid lubricant and wear-resistant additive together with fibrous PTFE forming an entangled fibrous PTFE structure, is used for a bearing of air-co

A PTFE-based sliding material, wherein the porous sintered layer on the surface of backing metal is impregnated with baked PTFE, with one or both of the solid lubricant and wear-resistant additive together with fibrous PTFE forming an entangled fibrous PTFE structure, is used for a bearing of air-conditioner. Resistance of the bearing for local wear is required. Such wear resistance is to be enhanced. Carbides of an oligomer or polymer containing a hydrophilic group formed during baking are incorporated in the entangled structure of fibrous PTFE.

대표청구항 ▼

1. A PTFE-based sliding material comprising: a backing metal; anda porous sintered layer formed on a surface of the backing metal, wherein said porous sintered layer is impregnated with a baked PTFE material; said baked PTFE material comprising an entangled PTFE fibers structure and a carbide incorp

1. A PTFE-based sliding material comprising: a backing metal; anda porous sintered layer formed on a surface of the backing metal, wherein said porous sintered layer is impregnated with a baked PTFE material; said baked PTFE material comprising an entangled PTFE fibers structure and a carbide incorporated therein, said entangled PTFE fibers structure formed by dispersing PTFE fibers in a media comprising water and an oligomer or polymer having a hydrophilic group, with the use of a surfactant, and wherein said carbide, formed during in situ baking of said oligomer or polymer having a hydrophilic group, being incorporated in the entangled PTFE fibers structure. 2. The PTFE-based sliding material according to claim 1, wherein the PTFE-based sliding material further comprises at least one member selected from the group consisting of a solid lubricant and a wear-resistant additive. 3. The PTFE-based sliding material according to claim 2, wherein the PTFE-based sliding material comprises a solid lubricant, and wherein said solid lubricant is selected from the group consisting of MoS2, graphite, BaSO4, Zn and Pb. 4. The PTFE-based sliding material according to claim 2, wherein the PTFE-based sliding material comprises a wear-resistant additive, and wherein said wear-resistant additive is selected from the group consisting of Al203, BN, iron-based phosphide, SiO2 and aromatic polyester. 5. The PTFE-based sliding material according to any one of claims 1 to 4, wherein said polymer having a hydrophilic group is polyvinyl alcohol or polyacrylic acid. 6. The PTFE-based sliding material according to claim 5, wherein the backing metal is a steel sheet, and wherein said porous sintered layer is a copper alloy. 7. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to claim 6. 8. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to claim 5. 9. The PTFE-based sliding material according to any one of claims 1 to 4, wherein said oligomer is a nonionic surfactant. 10. The PTFE-based sliding material according to claim 9, wherein the backing metal is a steel sheet, and wherein said porous sintered layer is a copper alloy. 11. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to claim 10. 12. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to claim 9. 13. The PTFE-based sliding material according to any one of claims 1 to 4, wherein the backing metal is a steel sheet, and wherein said porous sintered layer is a copper alloy. 14. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to claim 13. 15. A sliding bearing of an automobile or household compressor comprising the PTFE-based sliding material according to any one of claims 1 to 4. 16. A method for producing a PTFE-based sliding material comprising baking a PTFE dispersion containing at least one of an oligomer or a polymer having a hydrophilic group, wherein the step of baking the PTFE dispersion is performed in a non-oxidizing atmosphere so as to carbonize said oligomer or polymer having a hydrophilic group and thereby form a reinforcing component.