PFA has similar properties to FEP, but because of its lower melt viscosity than PTFE, it can be used at operating temperatures up to +260°C while maintaining melt processability.
PFA has several unique properties that make it suitable for medical, chemical and electrical applications, among others. PFA has the following properties:
Extremely high operating temperature up to +260°C
Extremely low operating temperature of -200°C
Non-stick properties
Low friction surface
Very high chemical and solvent resistance
Very high resistance
Biocompatibility
What are the pros and cons of PFA?
In addition to the unique properties of fluoropolymers, PFA offers the following advantages:
Continuous operating temperature of +260°C—- PFA has the highest operating temperature of all fluoroplastics except PTFE
Welding and reshaping potential
Protection against harsh environmental conditions
Insulated from electricity, heat, chemicals and solvents
Good penetration resistance
High purity grades available
High definition
PFA has similar physical and chemical properties to PTFE, but it has 10 times the flex life and lower permeability than PTFE. PFA has excellent crack and stress resistance as well as a low coefficient of friction.
The main disadvantage of PFA is that it is more expensive than PTFE or FEP.
What is PFA used for?
PFA is widely used in applications requiring higher purity, excellent chemical resistance and high operating temperature, such as medical tubing to heat exchangers, semiconductor cassettes, pumps and fittings, and valve liners.
PFA is ideal for temperature sensitive applications. It is usually thermoformed to form closed end caps that can be safely shrunk over temperature sensitive materials without damage.