Electrical Insulating Coatings

PTFE has excellent dielectric strength. This makes the surface a capacitor resulting in good insulation. The surface can carry high static charges and must be used carefully when in close proximity to sensitive electronic equipment or where dry powders and dust are in explosive concentrations. To reduce the ability of the coating to retain a charge, it can be formulated to include conducting solids such as graphite and metallic compounds, therefore providing a degree of earthing. For electrical insulation, coating thickness plays an important role. To achieve sufficient coating thickness, formulations of PFA and FEP are normally used.

Unique Electrical Properties
Over a wide range of frequencies, Teflon® has high dielectric Strength (2.1), low dissipation factor, and very high surface resistivity. By special techniques, it can be made electroconductive and used as an anti-static polymer. Teflon® electrical coatings are widely used in ESP electrical motors, because of their high dielectric strength and temperature resistance. Down-hole data logging cables as well as extention power cables are currently produced with fluoropolymers. With excellent resistance to Ultra Violet and stress cracking coupled with thermal stability, makes Teflon® the perfect choice.

Non-stick coatings can be used on a broad range of materials used in electronic applications including metals, metal oxides, polymers, and ceramics. Interfacial treatments with adhesion promoters for dissimilar materials are particularly important for performance and reliability in electronics.