Modified PTFE

Polymer-based composites of PTFE loaded with various additives serve to enhance specific functional properties for specialized applications. The following are common PTFE loadings with their key attributes: 

🔸PTFE +  Graphite 

 Utilized predominantly in chemical and mechanical environments, this composite benefits from graphite’s high thermal conductivity and excellent wear resistance under high loads. The addition facilitates reduced friction and improved thermal management. 

🔸PTFE + Carbon

This combination enhances wear resistance and load deformation characteristics while significantly increasing thermal conductivity. It maintains the inherent chemical inertness of PTFE. However, it notably alters the dielectric properties, which must be considered in electrical applications. 

🔸PTFE +  Glass Fiber 

The most widely used filling agent, glass fiber minimally affects the chemical and electrical properties of PTFE, thereby preserving its inertness. It provides a substantial improvement in mechanical strength and dimensional stability, with a slight increase in coefficient of friction. 

🔸PTFE + Bronze

This composite offers superior wear resistance and excellent deformation resistance under load, coupled with good thermal conductivity. Nevertheless, it exhibits reduced chemical resistance and lower dielectric strength, limiting its use in chemically aggressive or high-voltage environments. 

 Each of these filled PTFE materials is tailored to specific operational demands, balancing mechanical robustness, thermal management, and chemical inertness according to application requirements.