Ertalyte® TX is an unreinforced semi-crystalline thermoplastic polyester (PET-P) that has a solid lubricant filler. Designed for machining highly wear resistant parts where excellent performance in both high pressure and moderate velocity conditions exist. It is ideally suited for applications involving soft metal and plastic mating surfaces where rotary or sliding contact exist.
Key properties of Ertalyte® TX , are its high strength and stiffness, high wear-resistance, very good dimensional stability, high creep resistance and very good chemical resistance. This combination of properties make it an ideal material for machining bushings and bearings that require no start-up or running lubrication. Ertalyte® TX has FDA and USDA compliance and is ideal for applications in food packaging and processing equipment. Excellent dimensional stability, wear resistance, and low-friction characteristics make Ertalyte® TX an excellent choice for many demanding applications.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 1.44 | - |
| Tensile Strength @ Yield, 73°F | D638 | 10,500 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | 500,000 | psi |
| Tensile Elongation (at break), 73°F | D638 | 5 | % |
| Flexural Strength, 73°F | D790 | 14,000 | psi |
| Flexural Modulus of Elasticity | D790 | 360,000 | psi |
| Shear Strength, 73°F | D732 | 8,500 | psi |
| Compressive Strength - Ultimate | 1,000 | psi | |
| Compressive Strength at 2% Deformation | D695 | 1,500 | psi |
| Compressive Strength at 10% Deformation | D695 | 15,250 | psi |
| Deformation Under Load | % | ||
| Compressive Modulus of Elasticity, 73°F | D695 | 400,000 | |
| Compressive Strength ⊥ to Laminate (Modulus) | 1,000 | psi | |
| Compressive Strength ⊥ to Laminate (Yield) | 1,000 | psi | |
| Compressive Strength ⊥ to Laminate (Ultimate) | 1,000 | psi | |
| Hardness, Durometer (Shore "D" scale) | D2240 | D80 | |
| Hardness, Rockwell (Scale as noted) | D785 | M94 | Rockwell M |
| Izod Impact, Notched @ 73°F | D256 Type A | 0.4 | ft.lbs/in. of notch |
| Coefficient of Friction (Dry vs Steel) Static | PTM55007 | ||
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | 0.19 | |
| Maximum Static Bearing Load (P) | PTM55007 | 1,000 | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | PTM55007 | 15 | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM55007 | 6,000 | psi x ft/min. |
| Wear Factor "K" x 10-10 | PTM55010 | 35 | Cubic in.-min/ft.lbs.hr |
| Sand Wheel Wear/Abrasion Test | UHMW=100 | ||
| Minimum Mating Surface Hardness | Rockwell (Brinnell) | ||
| Coefficient of Linear Thermal Expansion | E-831(TMA) | 4.5 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion // to Laminates | E-831(TMA) | 4.5 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion I to Laminates | E-831(TMA) | 4.5 | in/in/°F x 10-5 |
| Softening Point | °F | ||
| Heat Deflection Temperature 264 psi | D648 | 180 | °F |
| Embrittlement Temperature | °F Min. | ||
| Continuous Service Temperature in Air | 210 | °F Max. | |
| Short Term Service Temperature | 220 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | N/A | °F |
| Melting Point (Crystalline) Peak | D3418 | 491 | °F |
| Thermal Conductivity | F433 | 1.9 | BTU-in/(hr/ft2°F) |
| Dielectric Strength Short Term | D149 | 533 | Volts/mil |
| Surface Resistivity | D257 | >1013 | ohm/cm |
| Volume Resistivity | D257 | - | ohm/cm |
| Dielectric Constant, 106 Hz | D150 | 3.4 | |
| Dissipation Factor, 106 Hz | D150 | .02 | |
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | HB | |
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | 0.06 | % |
| Water Absorption, Immersion Saturation | D570 (2) | 0.47 | % |
| Machinability Rating | 2 | 1=easy, 10=difficult | |
| Rod Diameter Availability (Off the Shelf) | .394-5.91 | inches | |
| Sheet Thickness Availability (Off the Shelf) | .315-3.94 | inches |