Cov khoom siv raw siv yog ua los ntawm polytetrafluoroethylene (F4, PTFE) thiab muaj kev ua tau zoo heev:
1. Kev kub siab ua haujlwm: kev siv ntev ntev: 200-260 degree;
2. Tsawg kub tsis kam: mos ntawm - 100 degree;
3. Corrosion kuj: resistant rau aqua regia thiab tag nrho cov organic solvents;
4. Huab cua tsis kam: qhov zoo tshaj plaws kev laus lub neej ntawm cov yas;
5. High lubrication: nws muaj qhov tsawg kawg nkaus kev sib txhuam coefficient (0.04) ntawm cov yas;
6. Tsis nplaum: nws muaj qhov tsawg kawg nkaus ntawm qhov nro ntawm cov khoom siv yam tsis ua raws li cov khoom siv;
7. Tsis muaj toxicity: physiological inertia;
8. Kev ua tau zoo ntawm hluav taws xob: zoo tagnrho C-qib flange khoom.
