Welcome To Mech Spares Private Limited
PET is an unreinforced, semi-crystalline thermo-plastic polyester derived from polyethylene terephthalate. Its excellent wear resistance, low coefficient of friction, high flexural modulus, and superior dimensional stabilty make it a versatile material for designing mechanical and electro-mechanical parts. Because PET has no centerline porosity, the possibilty of fluid absorption and leakage is virtually eliminated.
General Properties: | |||
---|---|---|---|
Physical Properties | ASTM Test Method | Units | PET |
Density | D792 | lbs/cu in.3 | 0.0499 |
Water absorption, 24 hours | D570 | % | 0.1 |
Mechanical Properties | ASTM Test Method | Units | PET |
Specific Gravity | D792 | g/cu cm.3 | 1.38 |
Tensile Strength at break, 73°F | D638 | psi | 11,500 |
Tensile Modulus, 73°F | D638 | psi | 4X105 |
Elongation at break, 73°F | D638 | % | 70 |
Flexural Strength, 73°F | D790 | psi | 15,000 |
Flexural Strength, 73°F | D790 | psi | 4X105 |
Izod Impact Strength, Notched, 73°F | D256 | ft-lbs/in. | 0.7 |
Rockwell Hardness | D785 | - | R117 |
Coefficient of Friction @ 40psi, 50 fpm | - | Static / Dynamic | 0.19/0.25 |
Thermal Properties | ASTM Test Method | Units | PET |
Heat Deflection, 264 psi | D648 | °F | 175 |
Melting Point | - | °F | 490 |
Coefficient of Linear Thermal Expansion | D696 | in./in./-°F | 3.9 X 10-5 |
Applicable Temp. Range for Thermal Expansion | - | °F | 50 – 250 |
Max. Serving Temperature for Long Term | - | °F | 230 |
Flammability | UL94 | - | HB |
Electrical Properties | ASTM Test Method | Units | PET |
Volume Resistivity, 73°F | D257 | ohm-cm | 1016 |
Dielectric Constant @ 60 Hz, 73°F, 50% RH | D150 | - | 3.4 |
Dissipation Factor, @ 60 Hz, 73°F | D150 | - | 0.002 |
Dielectric Strength | D149 | V/mil | 400 |
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