1. It has certain mechanical properties, such as tensile strength, elongation, etc., for mechanical shaft seals;

2. Adequate elasticity and hardness, with minimal permanent compression deformation;

3. Resistant to high and low temperatures, does not decompose or soften at high temperatures, and does not harden at low temperatures;

4. Suitable for the working medium, without swelling, decomposition, hardening, etc;

5. Good oxygen and aging resistance, durable and long-lasting;

6. Wear resistant and non corrosive to metals;

7. Easy to form and process, low price;