Sintered polytetrafluoroethylene composite material and seal ass

Details Sintered polytetrafluoroethylene composite material and seal ass Sintered polytetrafluoroethylene composite material and seal ass

1984-06-21

1986-04-08

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 962, 277DIG6, 524546, F16J 1520, C08L 2712

Patent

active

045807906

ABSTRACT:
A composition of matter adapted for use as a sealing material and in fabricating bushings, rider rings and structural support pads. The composition is sintered polytetrafluoroethylene (PTFE) having uniformly dispersed therein from 5 to 50 volume percent of filler particles selected from the group consisting of glass particles and mineral particles having a Rockwell C hardness of between 10 C to 50 C wherein the filler particles are present in the polytetrafluoroethylene when the sintering occurs. Lead glass, soda-lead glass and soda-lime glass are among the filler particles which are incorporated into the PTFE to form structurally strong compositions which generate low amounts of wear debris.

REFERENCES:
patent: 2400099 (1946-05-01), Brubaker et al.
patent: 2593582 (1952-04-01), Lontz et al.
patent: 3067135 (1962-12-01), Strub
patent: 3438932 (1969-04-01), Sieron
patent: 3759883 (1973-09-01), Mueller et al.
patent: 4408007 (1983-10-01), Kuhls et al.

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