Views: 0 Author: Site Editor Publish Time: 2023-08-25 Origin: Site
PFA is a co-polymer product of PTFE. The co-monomer perfluoroalkyl vinyl ether interferes in the crystallisability and molecular weight to achieve good mechanical properties and melt processability without sacrificing thermal performance and chemical resistance. The key advantage of PFA is its melt processability because of lower melt viscosity than PTFE.
Because of the high strength between Carbon, Fluorine and Oxygen atoms, PFA exhibits similar properties to PTFE over a large range of temperatures. Some other differences from PTFE are: Good permeability resistance because of lower void content and better deformation (Cold flow) resistance.
PFA has an outstanding chemical resistance, even at elevated temperature. It is resistant to strong mineral acids, inorganic bases, and inorganic oxidizing agents and to most of the organic compounds and their mixtures common in the chemical industry. However, it will react with fluorine and molten alkali.
PFA is semi-crystalline material, the maximum achievable Crystallinity is 60%.
Key features:
Chemically stable
Excellent dielectric strength
Wide temperature range (-200°C- +260°C)
Resistant to nearly all chemicals
Antistick properties
Low co-efficient of friction
FDA approved
High purity
UV Resistant
Typical applications
Medical tubing
Heat exchangers
Semi-conductor baskets
Valve liners
Pumps and fittings
Electrical insulation
Insulator bushes