PTFE polymer-based sliding material having fillers which improve the tribological properties
AssigneeKS Gleitlager GmbH
InventorsMario Witt, Rolf Reinicke, Riitta Taipalus
Life of this patent
Estimating the term…
Abstract
The invention relates to a PTFE polymer-based sliding material having fillers which improve the tribological properties, wherein the fillers comprise at least one phosphate, in particular calcium phosphate, calcium pyrophosphate, magnesium phosphate, magnesium pyrophosphate, lithium phosphate, hydroxyapatite or combinations thereof, and at least one metal sulfide, wherein the fraction of the metal sulfide is >2% by volume. The invention also relates to uses of said sliding material.
Claims18
Polytetrafluoroethylene (PTFE) polymer-based sliding material having fillers for improving tribological properties, characterised in that
- the fillers comprise a primary filler having calcium phosphate and at least one metal sulphide;
- the at least one metal sulphide is at least >2% by volume;
- contents of the fillers by volume are determined by weight and density;
- the at least one metal sulphide comprises Tin(IV) sulphide (SnS2), Bismuth (III) sulfide (Bi2S3), Tungsten disulfide (WS2), Zinc sulfide (ZnS), Copper (II) sulfide (CuS) or a combination thereof;
- the PTFE polymer-based sliding material having a PTFE polymer-base that comprises at least 70% by volume of PTFE;
- and
- the PTFE polymer-based sliding material comprises secondary fillers having solid lubricants with Barium sulfate (BaSO4).
Dependencies are inferred from the claim text.