PFA vs. PTFE

Both PFA and PTFE are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is PFA and the bottom bar is PTFE.

Perfluoroalkoxy (PFA)Polytetrafluoroethylene (PTFE)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		300
Elongation at Break, %		75 to 300

Flexural Modulus, GPa		0.7
Flexural Modulus, GPa		0.4 to 1.3

Tensile Strength: Ultimate (UTS), MPa		30
Tensile Strength: Ultimate (UTS), MPa		13 to 25

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		50
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70

Maximum Temperature: Mechanical, °C		260
Maximum Temperature: Mechanical, °C		260 to 270

Melting Onset (Solidus), °C		300
Melting Onset (Solidus), °C		330 to 340

Thermal Conductivity, W/m-K		0.25
Thermal Conductivity, W/m-K		0.24 to 0.65

Thermal Expansion, µm/m-K		120
Thermal Expansion, µm/m-K		110 to 120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz		2.6
Dielectric Constant (Relative Permittivity) At 1 MHz		2.1 to 2.4

Electrical Resistivity Order of Magnitude, 10^x Ω-m		16
Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18

Otherwise Unclassified Properties

Density, g/cm³		2.2
Density, g/cm³		2.1 to 2.3

Limiting Oxygen Index (LOI), %		80
Limiting Oxygen Index (LOI), %		90

Water Absorption After 24 Hours, %		0
Water Absorption After 24 Hours, %		0.0093 to 0.050

Common Calculations

Strength to Weight: Axial, points		3.9
Strength to Weight: Axial, points		1.7 to 3.2

Strength to Weight: Bending, points		10
Strength to Weight: Bending, points		5.7 to 8.7