... molybdenum disulfides, Polytetrafluoroethylene, carbon fibers, graphite, copper, toners, etc. All the known plastics, PTFE has some remarkable properties: it will ... could be cooled to -180°C without becoming brittle and it could be heated to 260°C without impairing ... its performance. PTFE materials also are extremely stable and nonflammable; clean, dry, non-oily and non-staining. The ...