Property | Unit | ASTM/ UL Test | PTFE | PEEK | PVDF |
PHYSICAL | |||||
Density | lb/in 3 | D729 | 0.078 | 0.047 | 0.064 |
g/cm3 | -2.2 | -1.31 | -1.77 | ||
Water Absorption | 24 hr (%) | D570 | <0.01 | 0.1 | 0.03 |
MECHANICAL | |||||
Strength/Weight Ratio | g/cc | Tensile Strength/ | 1,800 | 12,200 | 4,000 |
Density | |||||
Tensile Strength | psi | D638 | 3,900 | 16,000 | 7,000 |
Tensile Modules | psi | D638 | 80,000 | 500,000 | 290,000 |
Tensile Elongation at Breaking Point | % | D638 | 300 | 20 | 50 |
Flexural Strength | psi | D790 | No Break | 25,000 | 97,000 |
Flexural Modulus | psi | D790 | 72,000 | 630,000 | 290,000 |
Hardness | - | D785 | R58 | R126 | R80 |
Rockwell, R/M Scale | |||||
IZOD Impact Notched | ft-lb/in | D256 | 3.5 | 1.6 | 3 |
THERMAL | |||||
Coefficient of Linear Thermal Expansion | 10-5 in/in/°F | D696 | 7.5 | 2.6 | 6.6 |
Heat Deflection Temperature | at 264 psi (°F/°C) | D648 | 132/55 | 320/160 | 230/110 |
Melting Temperature | °F/°C | D3418 | 635/335 | 644/340 | 332/166 |
Max. Operating Temperature | °F/°C | - | 500/260 | 480/249 | 300/150 |
Thermal Conductivity | BTU- in/ft2-hr-°F | C177 | 1.7 | 1.8 | 1.2 |
Flammability Rating | - | UL94 | V-0 | V-0 | - |
ELECTRICAL | |||||
Dielectric Strength | short time, | D149 | 600 | 480 | 1,700 |
1/8" thick (V-mil) | |||||
Dielectric Constant | - | D150 | 2.1 | 3.3 | 8.5 |
at 1 MHz | |||||
Dissipation Factor | - | D150 | <0.0002 | 0.003 | 0.015 |
at 1 MHz | |||||
Volume Resistivity | at 50% RH (ohm) | D257 | >1011 | 1,016 | 2*1014 |