Ertalyte® is a trade name for the thermoplastic polymer resin, polyethylene terephthalate.  Other trade names for this material are Ensitep® PET, Sustadur PET, TECAPET™ PET.

MechanicalASTM Test MethodValueUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7921.41-
Tensile Strength @73 F, (ult)/(yld)D63812,400 (ult)psi
Tensile Modulus of Elasticity @73 FD638460,000psi
Tensile Elongation at Break @73 FD63820%
Flexural Strength @73 FD79018,000psi
Flexural Modulus of Elasticity @73 FD790490,000psi
Shear Strength @73 FD7328,000psi
Comprehensive Strength, (% Deformation) @73 FD69515,000 (10)psi
Comprehensive Modulus of Elasticity @73 FD695420,000psi
Hardness, Rockwell, Scale as noted @73 FD785M93 (R125)-
Hardness, Durometer, Shore D @73 FD2240D87-
Izod Impact, (Notched) @73 FD256 Type A0.5ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic-0.2-
Limiting PV, (with 4 to 1 factor of safety applied)-3,160psi-ft/min
ThermalASTM Test MethodValueUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)3.3 E-05in/in/F
Heat Deflection Temperature @264 psiD648240F
Tg-Glass transition termperature, (Amorphous)D3418-F
Melting Point, (VS=Vicat Softening Temp.)D3418491F
Continuous Service Temperature in Air, (Max.)-210F
Thermal Conductivity-2.0BTU-in/hr-ft2-F
ElectricASTM Test MethodValueUnits
Dielectric Strength, Short TermD149385Volts/mil
Volume ResistivityD2575.5 E+14ohm-cm
Dielectric Constant @10E6 HzD150--
Dissipation Factor @10E6 HzD150--
Flammability @3.1 mm unless notedUL94HB-
H2OASTM Test MethodValueUnits
Water Absorption, Immersion, 24 hoursD570(7)0.07% by weight
Water Absorption, SaturationD570(7)0.90% by weight