1. Mechanical seal materials must have a certain mechanical properties such as tensile strength, elongation, and the like;
2. Elastic and hardness, compression permanent deformation;
3. High temperature resistance and low temperature, no decomposition, softened, low temperature under high temperature;
4. Adapt to the working medium, do not cause swelling, easy to decompose and harden the mechanical seal material;
5. Oxygen oxygen resistance and aging resistance, durability;
6. Wear resistance, no corrosion metal;
7. Mechanical seal materials should be easily formed, and the price is low;
