The Role Of Polytetrafluoroethylene Powder In Silicone

Polytetrafluoroethylene (PTFE) powder plays the following main roles in silicone:
Improve wear resistance: PTFE powder has good wear resistance due to its stable molecular structure. When added to silicone, it can significantly improve the wear resistance of silicone products, making them more durable.

Enhance chemical resistance: PTFE powder has excellent chemical stability and can withstand almost all chemicals except molten metal sodium and liquid fluorine, including boiling in aqua regia. Therefore, silicone products with PTFE powder added can better resist the erosion of chemicals.

Improve lubricity and reduce friction coefficient: PTFE powder has high lubricity and low friction coefficient, which can effectively reduce the friction between silicone products and other materials, thereby improving the use efficiency and life of the product.

Improve tear resistance: The addition of PTFE powder can also enhance the tear resistance of silicone, making it tougher and less prone to damage.

Flame retardancy and weather resistance: PTFE powder has excellent flame retardancy and weather resistance. Adding it to silicone can improve the flame retardancy and weather resistance of silicone products, making them safer and more reliable.

In actual applications, the amount of PTFE powder added usually needs to be adjusted according to the specific requirements and formula of the silicone product, and the general amount added is 2%~15%. In addition, the mixing method of PTFE powder and silicone also needs attention. Usually, shear high-speed stirring and other treatments are required to achieve better dispersibility and application range.

In summary, polytetrafluoroethylene powder plays an important role in silicone and can significantly improve the performance and quality of silicone products.