Waterproof packing

Details Waterproof packing Waterproof packing

1982-09-30

1984-02-14

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

57258, 87 1, 87 6, 277227, 277230, 277DIG6, 308DIG8, 308DIG9, 384300, 427180, 427226, 428253, 428265, 428267, 428268, 428269, 428368, 428378, 428392, 428422, B65D 5306, F16C 3320, F16J 1516

Patent

active

044316984

ABSTRACT:
A low-friction, water- and steam-resistant packing suitable for both static and dynamic applications includes inorganic fiber selected from the group consisting of chemical, electrical, structural and alkali resistant glasses, ceramic, quartz, carbon and graphite materials, and dispersed and dried, but unsintered, polytetrafluoroethylene (TFE). The packing is essentially free of wetting agent and is prepared by combining the inorganic fiber with a TFE dispersion containing a wetting agent and heating the resulting combination to a temperature high enough to decompose the wetting agent but insufficiently high to sinter the particles of the dispersion.

REFERENCES:
patent: 3306155 (1967-02-01), Zumeta et al.
patent: 4163825 (1979-08-01), Wimmer

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