PET
Typical Properties of PET, PBT, & PEEK
|
Property |
Test Method | PET | PBT | PEEK |
|
Mechanical Properties |
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| Specific Gravity | ASTM D792 | 1.38 | 1.31 | 1.32 |
| Density (lb/in³) | ASTM D792 | 0.0499 | – | 0.0477 |
| Tensile Strength, Break (p.s.i.) | ASTM D638 | 11,500 | 7,500 | 14,000 |
| Elongation At Break (%) | ASTM D638 | 70 | 200 | 60 |
| Tensile Modulus (p.s.i.) | ASTM D638 | 400,000 | 377,000 | 490,000 |
| Rockwell Hardness | ASTM D785 | R117 | M72 | R126 / M99 |
| Impact Strength 73°F Notched (ft-lbs/in) | ASTM D256 | 0.7 | 1.0 | 1.6 |
| Flexural Strength (p.s.i.) | ASTM D790 | 15,000 | 12,000 | 24,600 |
| Flexural Modulus (p.s.i.) | ASTM D790 | 400,000 | 330,000 | 590,000 |
| Coefficient Of Friction (Dynamic) | 40psi 50fpm | 0.25 | 0.22 | 0.25 |
|
Thermal Properties |
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| Melting Point (°F) | – | 490 | 428 | 644 |
| Heat Deflection at 66psi (°F) | ASTM D648 | 240 | 310 | – |
| Heat Deflection at 264psi (°F) | ASTM D648 | 175 | 130 | 306 |
| Max Service Temperature Short Term (°F) | – | 320 | 250 | 600 |
| Max Service Temperature Long Term (°F) | – | 230 | 245 | 480 |
| Thermal Conductivity (BTU-in/ft²-hr-°F) | ASTM C177 | 2.01 | – | 1.73 |
| Coefficient of Linear Thermal Expansion (in/in/°F) | ASTM D696 | 0.000039 | 0.000078 | 0.000026 |
| Flammability | UL94 | HB | HB | V-0 |
|
Electrical Properties |
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| Dielectric Constant At 60HZ | ASTM D150 | 3.4 | 3.3 | 3.2 |
| Dissipation Factor At 60HZ | ASTM D150 | 0.002 | 0.0009 | 0.003 |
| Dielectric Strength (V/mil) | ASTM D149 | 400 | 400 | 480 |
|
Water Absorption Rates |
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| Water Absorption -24 hrs. (%) | ASTM D570 | 0.10 | 0.08 | 0.5 |
| Water Absorption -Saturation (%) | ASTM D570 | 0.50 | 0.50 | 0.50 |
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets.