Material for use in composite sliding surface bearings and process of manufacturing the material

US5024881A · kind A · utility

Assignee

• Kolbenschmidt Aktiengesellschaft · DE

Inventors

• Karl-Heinz Matucha · Kelkheim, DE
• Thomas Steffens · Bad Rappenau, DE
• Hans-Paul Baureis · Dielheim, DE
• Wolfgang Bickle · Reilingen, DE
• Jurgen Braus · Walldorf, DE

Key dates

• Filing date: May 2, 1989
• Grant date: Jun 18, 1991
• Expiry date: May 2, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31699
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A material for composite sliding surface bearings having a plastic sliding layer comprises a metallic backing layer and a sliding layer that is joined to the backing layer and consists of a matrix-forming fluorine-containing polymer, in which a metal powder having a high affinity to fluorine is finely dispersed. In order to reduce the friction torque and the wear rate, the fluorine-containing polymer contains metal fluoride and metal oxyfluoride and consists of monoclinally crystallized PVDF, amorphous PVDF and a novel polymer, which in an X-ray diffractogram prepared by CuK .alpha.-radiation has a sharp intensity peak at a double Bragg angle of 2.theta.=18.07.+-.0.03.degree. and has a melting range of 320.degree. to 350.degree. C. and is free of ortho-rhombically crystallized PVDF.