PETP
PETP (polyethyleneterephthalate) [Ertalyte®, Rynite®, Tecadur®]
Properties
- Unreinforced, semi-crystalline thermoplastic polyester
- The wear resistance of nylon with the dimensional stability of acetal
- Excellent for both dry and wet settings
- Strong and rigid
- Stain– and acid-resistant
- FDA-compliant in natural and black
- USDA, 3A-Dairy and Canada AG-compliant in natural
Common uses
- Ideal for precision mechanical parts
- Parts used in the food-processing and food-equipment industries
- Parts on pharmaceutical test equipment
PETP
Material Specifications
| ASTM or UL test | Property | Unfilled | TX Lubricated |
Physical |
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| D792 | Density (lb/in3)/(g/cm3) | 0.051 (1.41) | 0.052 (1.44) |
| D570 | Water absorption, 24 hrs (%) | 0.07 | 0.06 |
Mechanical |
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| D638 | Tensile strength (psi) | 12,400 | 11,000 |
| D638 | Tensile modulus (psi) | 460,000 | 500,000 |
| D638 | Tensile elongation at break (%) | 20 | 5 |
| D790 | Flexural strength (psi) | 18,000 | 16,000 |
| D790 | Flexural modulus (psi) | 490,000 | 460,000 |
| D695 | Compressive strength (psi) | 15,000 | 15,250 |
| D695 | Compressive modulus (psi) | 420,000 | 400,000 |
| D2240 | Hardness, Rockwell | M93/R125 | M94 |
| D256 | Izod notched impact (ft-lb/in) | 0.5 | 0.4 |
Thermal |
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| D696 | Coefficient of linear thermal expansion (x 10–5 in/in/F°/C°) | 3.30 | 4.50 |
| D648 | Heat deflection temp (F°/C°) at 264 psi | 240/116 | 180/82 |
| D3418 | Melting temp (F°/C°) | 49½55 | 49½55 |
| - | Max operating temp (F°/C°) | 210/99 | 210/99 |
| C177 | Thermal conductivity (BTU-in/ft2–h– F°) |
1.9 | 6.6 |
| UL94 | Flammability rating | H-B | H-B |
Electrical |
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| D149 | Dielectric strength (V/mil) short time, ⅛” thick | 385 | - |
| D150 | Dielectric constant at 60 Hz | 3.4 | - |
| D150 | Dissipation factor at 60 Hz | - | - |
| D257 | Volume resistivity (ohm/cm) at 50% RH | >1013 | >1013 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
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