Ethylene Chlorotrifluoroethylene (ECTFE)
ECTFE is a fluoroplastic (fluorine-based thermoplastic). It has a fairly high density and a fairly high ductility among thermoplastics. The graph bars on the material properties cards below compare ECTFE to: fluoroplastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
1.6 GPa 0.23 x 106 psi
Elongation at Break
230 %
Flexural Modulus
1.7 GPa 0.24 x 106 psi
Flexural Strength
47 MPa 6.8 x 103 psi
Rockwell R Hardness
93
Tensile Strength: Ultimate (UTS)
49 MPa 7.1 x 103 psi
Thermal Properties
Heat Deflection Temperature At 1.82 MPa (264 psi)
91 °C 190 °F
Heat Deflection Temperature At 455 kPa (66 psi)
110 °C 220 °F
Maximum Temperature: Autoignition
620 °C 1140 °F
Maximum Temperature: Decomposition
450 °C 830 °F
Maximum Temperature: Mechanical
150 °C 310 °F
Melting Onset (Solidus)
240 °C 460 °F
Specific Heat Capacity
1170 J/kg-K 0.28 BTU/lb-°F
Thermal Conductivity
0.15 W/m-K 0.089 BTU/h-ft-°F
Thermal Expansion
100 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
2.3
Dielectric Constant (Relative Permittivity) At 1 MHz
2.6
Dielectric Strength (Breakdown Potential)
18 kV/mm 0.68 V/mil
Electrical Resistivity Order of Magnitude
14 10x Ω-m
Otherwise Unclassified Properties
Density
1.7 g/cm3 110 lb/ft3
Limiting Oxygen Index (LOI)
60 %
Water Absorption After 24 Hours
0.094 %
Common Calculations
Stiffness to Weight: Axial
0.52 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
8.1 points
Strength to Weight: Bending
18 points
Thermal Diffusivity
0.078 mm2/s
Thermal Shock Resistance
22 points
Followup Questions
Further Reading
Fluoroplastics: Volume 2 - Melt Processable Fluoropolymers, Sina Ebnesajjad, 2003
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999