... is die-pressed or turned by 100% pure PTFE raw material. In the known plastics, the PTFE has a best corrosion resistance, no ... die-pressed or turned by 100% pure PTFE raw material. In the known plastics, the PTFE has a best corrosion resistance, no ... graphite, and copper, etc., then die-pressed. Comparing with the pure PTFE product, it has better compressive strength, wearing resistance, good thermal ...