GEBUNDENES GARNDICHTUNGSMATERIAL.

摘要

A packing material having improved chemical resistance formed of poly(phenylene) sulfide and polytetrafluoroethylene fibers is provided. Each of the fibers may be treated with PTFE dispersion and, optionally, with graphite. The fibers can be knitted, braided or twisted together and the structure may be impregnated with a polytetrafluoroethylene based binder and lubricant. The resulting packing material has improved temperature characteristics, heat transfer characteristics, wear resistance, provides a dense impervious packing and is dimensionally stable in addition to the improved chemical resistance. A packing material prepared from fibers treated only with a PTFE dispersion is especially useful in the paper making industry and for other applications wherein dark colored fibers are not permissible.