Material Data Sheet
Material: Ertalyte® PET-P
Polyethylene terephthalate (PET-P)Ertalyte® is an unreinforced thermoplastic polyester based on polyethylene terephthalate (PET-P). Ertalyte® is a proprietary material only made and offered by Quadrant. Ertalyte® provides high strength, rigidity and low water absorption makes it a good choice for tight tolerance machining. It also possesses a low coefficient of friction and good wear resistance making it a good material for high load or bearing applications. Ertalyte® is also FDA approved, stain resistant, and moderately resistant to acids making it a good choice for the food processing industry. Ertalyte®'s continuous service temperature is 210°F giving it the ability to outperform acetals and nylons at higher temperatures.
| Mechanical Properties | Test Method ASTM | Value | Units |
| Specific Gravity, 73°F | D792 | 1.41 | |
| Tensile Strength, 73°F | D638 | 12,400 | psi |
| Tensile Modulus of Elasticity, °F | D638 | 460,000 | psi |
| Tensile Elongation ( at break), 73°F | D638 | 20 | % |
| Flexural Strength, 73°F | D790 | 18,000 | psi |
| Flexural Modulus of Elasticity, 73°F | D790 | 490,000 | psi |
| Shear Strength, 73°F | D732 | 8,000 | psi |
| Compressive Strength, 10% Deformation, 73°F | D695 | 15,000 | psi |
| Compressive Modulus of Elasticity, 73°F | D695 | 420,000 | psi |
| Hardness, Rockwell, Scale as noted, 73°F | D785 | M93 (R125) | |
| Hardness, Durometer, Shore "D" Scale, 73°F | D2240 | D87 | |
| Izod Impact (notched), 73°F | D256 Type A | 0.5 | ft-lb/in of notch |
| Coefficient of Friction (Dry vs. Steel) Dynamic | QTM 55007 | 0.2 | |
| Limiting PV (with 4:1 safety factor applied) | QTM 55007 | 2,800 | ft.lbs./in.2 min |
| Wear Factor "k" x 10-10 | QTM 55010 | 60 | in.3-min/ft.lbs.hr |
| Thermal Properties | |||
| Coefficient of Linear Thermal Expansion (-40°F to 300°F) | E-831 (TMA) | 3.3 x 10-5 | in/in./°F |
| Heat Deflection Temperature 264 psi | D648 | 240 | °F |
| TG-Glass transition (amorphous) | D3418 | N/A | °F |
| Meltin Point (Crystalline) peak | D3418 | 491 | °F |
| Continuous Service Temperature in Air (Max.) (1) | 210 | °F | |
| Thermal Conductivity | F433 | 2 | BTU-in/hr-ft²-°F |
| Electrical Properties | |||
| Dielectric Strength, Short Term | D149 | 385 | Volts/mil |
| Surface Resistivity | EOS/ESD S11.11 | >1013 | ohm/square |
| Dielectric Constant, 106 Hz | D150 | 3.4 | |
| Dissipation Factor, 106 Hz | D150 | 0.02 | |
| Flammability @ 3.1 mm (1/8 in.) | UL 94 | HB | |
| FDA Compliant | Yes | ||
| *The values shown in these and the following charts are typical, average properties. Actual values may differ due to variations in resin formulations and processing methods. These values are obtained from sources believed to be reliable, including the resin manufactures, converters and other published sources. However, they should not be used for specification or design purposes. |
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