Wear resistant materials

Claim 2

A wear resistant material comprising a substance selected from the following mixtures (A), 10 (B) and (C): (A) a first mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of ETFE, PVDF, PCTFE and EPE, and the balance substantially PTFE; (B) a second mixture consisting essentially of 0. 1 to 50 vol% in total of at least two compositions selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE, and 15 the balance substantially PTFE; and (C) a third mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE; 0.1 to 35 vol% of at least one composition selected from a group consisting of solid lubricants, metal oxides, metal sulfides, metal fluorides, graphite, fibrous materials.

Claim 3

A sliding and/or bearing material having a superior wear resisting property consisting of: a backing layer; a porous metallic layer supported by the backing layer with or without an intermediate layer joined to said backing layer, and a substance with which said porous layer is impregnated or impregnatedand-coated, said 25 substance being one selected from the following mixtures (A), (B) and (C): (A) a first mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of ETFE, PVDF, PCTFE and EPE, and the balance substantially PTFE; (B) A second mixture consisting essentially of 0. 1 to 50 vol% in total of at least two compositions selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE, and 30 the balance substantially PTFE; and (C) a third mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of FEP, PFA, ETFE, PVDF, and EPE; 0.1 to 35 vol% of at least one composition selected from a group consisting of solid lubricants, metal oxides, metal sulfides, metal fluorides, graphite, fibrous materials and ceramics; and the balance substantially PTFE, 35 the total of contents of the compositions other than PTFE being in a range between 0.2 and 70 Vol%.

Claim 4

A sliding and/or bearing material having a superior wear resisting property consisting of: a backing layer; a porous metallic layer supported by the backing layer with or without an intermediate layer joined to said backing layer, and a substance with which said porous layer is impregnated or impregnatedand-coated, said 25 substance being one selected from the following mixtures (A), (B) and (C): (A) a first mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of ETFE, PVDF, PCTFE and EPE, and the balance substantially PTFE; (B) A second mixture consisting essentially of 0. 1 to 50 vol% in total of at least two compositions selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE, and 30 the balance substantially PTFE; and (C) a third mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of FEP, PFA, ETFE, PVDF, and EPE; 0.1 to 35 vol% of at least one composition selected from a group consisting of solid lubricants, metal oxides, metal sulfides, metal fluorides, graphite, fibrous materials and ceramics; and the balance substantially PTFE, 35 the total of contents of the compositions other than PTFE being in a range between 0.2 and 70 Vol%.

Claim 5

A sliding and/or bearing material according to claim 2, wherein said backing layer is formed from steel strip, and an intermediate layer is included which is a copper plating layer.

Claim 6

A sliding and/or bearing material according to claim 2 or claim 3, wherein said porous 40 metallic layer is of a sintered body of a Cu-based alloy.

Claim 7

A sliding and/or bearing material according to claim 4, wherein said Cu-based alloy is a Cu-Sn-Pb alloy.

Claim 8

A material as claimed in any one of claims 1 to 5 in which the one composition in the first mixture is 0.5 to 45 vol%.

Claim 9

A material as claimed in any one of claims 1 to 5 in which the two compositions in the second mixture is 0.5 to 45 vol%.

Claim 10

A material as claimed in any one of claims 1 to 5 in which at least one composition in the third mixture is 0.5 to 40 vol%.

Claim 11

A material as claimed in any one of the preceding claims, wherein the solid lubricant in the mixture is a low melting point metallic lubricant selected from the group of Pb, Sn or their alloys; a metal oxide selected from the group comprising PbO, A12031 Si02, Pb30,, Ti021 CdO and Sb20,; a metal sulfide selected from the group comprising PbS, MOS2 and WS2; a metal fluoride selected from the group comprising PbF2, AIF2, CdF2 and BaF2; or graphite or the like.

Claim 12

A material as claimed in any one of the preceding claims in which the fibrous material in the mixture is a natural or an artificial fibre selected from the group comprising carbon fibres, glass fibres, cotton (cellulose), asbestors, fibres of potassium titanate. 40

Claim 13

A material as claimed in any one of the preceding claims, in which the ceramics in the 40 mixture is selected from the group comprising SiC, TiC, TiN, B,C, BN and SO,

Claim 14

A sliding and/or bearing material substantially as specifically described herein with reference to any one of the Examples 14 to 31 of Table 1.

Claim 15

A sliding and/or bearing material substantially as specifically described herein with reference to any one of the Examples 14 to 31 of Table 1.

Claim 16

A sliding and/or bearing product incorporating material as claimed in any one of the preceding claims. Printed in the United Kingdom for Her Majesty's Stationery Office, Dd 8818935, 1984, 4235. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained. i. 1 9. A material as claimed in any one of claims 1 to 5 or 8 in which at least one composition 50 selected from a group consisting of solid lubricants in the third mixture is 0.5 to 30 vol%. 10. A material as claimed in any one of claims 1 to 5, 8 or 9 in which the total of the composition other than PTFE in the third mixture is 0.5 to 60 vol%. 11. A material as claimed in any one of the preceding claims wherein the solid lubricant in mixture C is a low melting point metallic lubricant selected from the group of Pb or Sn. 12. A material as claimed in any one of the preceding claims in which the solid lubricant in mixture C is a metal oxide selected from the group comprising PbO, A12031 S'02, Pb3O,, Ti021 CdO, and Sb203' 13. A material as claimed in any one of claims I to 11 in which the solid lubricant in mixture C is a metal sulfide selected from the group comprising PbS, MOS2, and WS2; or a metal fluoride selected from the group PbF2, AIF3, CdF2 and BaF2; or a ceramic selected from the group SiC, TiC, TiN, B,C, BN and SO,

Claim 17

A sliding and/or bearing material substantially as specifically described herein with reference to any one of the examples 5 to 31 of Table 1. 15. A sliding and/or bearing product incorporating material as claimed in any one of the 65 6 GB 2 139 236A 6 preceding claims. CLAIMS (6 Jul 1984) 1. A wear resistant material comprising a mixture consisting essentially of 0. 1 to 50 vol% of at 5 least one composition selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE; 0. 1 to 35 volO/o of at least one composition selected from a group consisting of solid lubricants, fibrous materials, and ceramics, and the balance substantially PTFE, the total of contents of the compositions other than PTFE being in the range between 0.2 and 70 vol%. 2. A sliding and/or bearing material having a superior wear resisting property consisting of: a backing layer; a porous metallic layer supported by the backing layer with or without an intermediate layer joined to said backing layer; and a substance with which said porous layer is impregnated or impregnatedand-coated, said substance being a mixture consisting essentially of 0. 1 to 50 vol% of at least one composition selected from a group consisting of FEP, PFA, ETFE, PVDF, PCTFE and EPE; 0.1 to 35 vol% of at least one composition selected from a group consisting of solid lubricants, fibrous materials and ceramics; and the balance substantially PTFE, the total of centents of the compositions other than PTFE being in a range between 0.2 and 70 vol%. 3. A sliding and/or bearing material according to Claim 2, wherein said backing layer is formed from steel strip, and an intermediate layer is included which is a copper plating layer. 20 4. A sliding and/or bearing material according to Claim 2 or Claim 3, wherein said porous metallic layer is of a sintered body of a Cu-based alloy. 5. A sliding and/or bearing material according to Claim 4, wherein said Cu-based alloy is a Cu-Sn-Pb alloy. 6. A material as claimed in any one of Claims 1 to 5, in which at least one composition in 25 the mixture is 0.5 to 40 vol%. 7. A material as claimed in any one of the preceding claims, in which at least one composition selected from a group consisting of solid lubricants, fibrous materials and ceramics in the mixture is 0.5 to 30 vol%. 8. A material as claimed in any one of the preceding claims, in which the total of the 30 composition other than PTFE in the mixture is 0.5 to 60 vol%.