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ETFE vs. ECTFE

Both ETFE and ECTFE are thermoplastics. There are 26 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ETFE and the bottom bar is ECTFE.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.5
1.6
Elongation at Break, % 230
230
Flexural Modulus, GPa 1.2
1.7
Tensile Strength: Ultimate (UTS), MPa 46
49

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 50
91
Heat Deflection Temperature At 455 kPa (66 psi), °C 80
110
Maximum Temperature: Autoignition, °C 540
620
Maximum Temperature: Decomposition, °C 400
450
Maximum Temperature: Mechanical, °C 160
150
Melting Onset (Solidus), °C 260
240
Specific Heat Capacity, J/kg-K 1000
1170
Thermal Conductivity, W/m-K 0.24
0.15
Thermal Expansion, µm/m-K 95
100

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 2.1
2.3
Dielectric Constant (Relative Permittivity) At 1 MHz 2.6
2.6
Dielectric Strength (Breakdown Potential), kV/mm 16
18
Electrical Resistivity Order of Magnitude, 10x Ω-m 15
14

Otherwise Unclassified Properties

Density, g/cm3 1.8
1.7
Limiting Oxygen Index (LOI), % 30
60
Water Absorption After 24 Hours, % 0.010
0.094

Common Calculations

Stiffness to Weight: Axial, points 0.48
0.52
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 7.3
8.1
Strength to Weight: Bending, points 16
18
Thermal Diffusivity, mm2/s 0.14
0.078
Thermal Shock Resistance, points 23
22