FR is a composites material with
bronze wire mesh as frame and calendered with a
film of filled poly tetrafluoroethylene. This is
of low friction and low wear, and is rather soft
and is to be applied readily by inserting between
the two rubbing metal surfaces, and can fulfill
the ideal aim of no noise, no lubricating, no maintenance
and no pollution. At present, this is applied in
those mechanical elements under relatively low load
and low speed. Such al in textile machines, spherical
bearings. Automobile door hinge and the operating
rod for cars.
