PTFE vs. PVDF

Both PTFE and PVDF are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

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

Polytetrafluoroethylene (PTFE)Polyvinylidene Fluoride (PVDF)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		75 to 300
Elongation at Break, %		200

Flexural Modulus, GPa		0.4 to 1.3
Flexural Modulus, GPa		1.5

Flexural Strength, MPa		13 to 50
Flexural Strength, MPa		75

Tensile Strength: Ultimate (UTS), MPa		13 to 25
Tensile Strength: Ultimate (UTS), MPa		49

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		85

Maximum Temperature: Mechanical, °C		260 to 270
Maximum Temperature: Mechanical, °C		140

Melting Onset (Solidus), °C		330 to 340
Melting Onset (Solidus), °C		170

Thermal Conductivity, W/m-K		0.24 to 0.65
Thermal Conductivity, W/m-K		0.12

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

Electrical Properties

Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18
Electrical Resistivity Order of Magnitude, 10^x Ω-m		12

Otherwise Unclassified Properties

Density, g/cm³		2.1 to 2.3
Density, g/cm³		1.8

Limiting Oxygen Index (LOI), %		90
Limiting Oxygen Index (LOI), %		49

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

Common Calculations

Strength to Weight: Axial, points		1.7 to 3.2
Strength to Weight: Axial, points		7.8

Strength to Weight: Bending, points		5.7 to 8.7
Strength to Weight: Bending, points		17