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Ertalyte® TX Polyethylene Terephthalate Polyester PET is a premium internally lubricated bearing-grade that exhibits superior dimensional stability and wear resistance, a low coefficient of friction, high strength and rigidity, outstanding stain resistance, and great chemical and abrasion resistance. Due to Ertalyte® TX PET’s low moisture absorption rate, this grade’s mechanical and electrical properties are unaffected by moisture, which gives this grade better wear and inertness over nylon and acetal products, and also a lower wear rate than unmodified polyesters. These characteristics make Ertalyte® TX PET ideal for use in applications that involve high pressure and velocity conditions, and environments with soft metal and plastic mating surfaces where noise abatement is critical.
Material Properties
High mechanical strength, stiffness, and hardness
Very good creep resistance
Low and constant coefficient of friction
Excellent wear resistance (comparable to or even better than Nylon grades)
Very good dimensional stability (better than Polyacetal)
Physiologically inert (suitable for food contact)
Available Geometries
Ertalyte® TX PET stock shapes encompass a range of standard sizes in the following geometries: Tubular bar, Rod, Plate
Available Colors
Ertalyte® TX PET stock shapes come in the following colors: Pale-Grey, Light Blue
Key Properties
FDA Compliant
Good for both wet and dry environments
High strength and rigidity
Excellent stain resistance
Good wear resistance
Excellent dimensional stability
Better acid resistance than nylon or acetal
Limitations
Low Resistance to Continuous Hot Water or Steam
Low Resistance to Strong Alkalies
Not recommended for continuous use in alkaline liquid or in hot water over (131 F / 55 C)
Applications
Bushings & Bearings
Food & Beverage Processing Equipment Components
Manifolds
Pharmaceutical Test Equipment - Carousel, Filter Track, Locating Disk & Ring
Piston & Fill Valves for Food Processing
Process and Test Equipment Manifolds
Pump & Valve Components
Rollers
Typical Properties of Ertalyte ® TX PET-P
| Description | Value |
| Material Type | Semi-Crystalline Thermoplastic |
| Chemical Name | PET-P Polyethylene Terephthalate Polyester |
| Trade Name | Ertalyte®TX |
| Additives | Premium Solid Lubricant Filled |
| Color | Gray |
| Manufacturer | Quadrant |
| Physical | |||
| Property | Test | Unit of Measure | Value |
| Density | ASTM D792 | g/cm³ | 1.44 |
| ASTM D792 | lb/in³ | 0.052 | |
| Water Absorption, 24 hrs, Immersion | ASTM D570 | % by wt. | 0.06 |
| Water Absorption, Saturation, Immersion | ASTM D570 | % by wt. | 0.47 |
| Mechanical | |||
| Property | Test | Unit of Measure | Value |
| Tensile Strength | ASTM D638 | psi | 11000 |
| Tensile Modulus | ASTM D638 | psi | 500000 |
| Tensile Elongation at Break | ASTM D638 | % | 5 |
| Flexural Strength | ASTM D790 | psi | 16000 |
| Flexural Modulus | ASTM D790 | psi | 460000 |
| Compressive Strength | ASTM D695 | psi | 15250 |
| Compressive Modulus | ASTM D695 | psi | 400000 |
| Hardness | ASTM D785 | NA | Shore D80 |
| IZOD Impact-Notched | ASTM D256 | ft-lb/in | 0.4 |
| Dynamic Coefficient of Friction | QTM 55007 | NA | 0.19 |
| Wear K Factor | QTM 55010 | in³-min/ft-lbs-hr | 35 |
| Limiting PV | QTM 55007 | psi-fpm | 6000 (4:1 safety factor) |
| Thermal | |||
| Property | Test | Unit of Measure | Value |
| Coefficient of Linear Thermal Expansion | ASTM D696 | x 10-5 in./in./°F | 4.5 |
| Heat Deflection Temp | ASTM D648 | °C at 264 psi | 82 |
| ASTM D648 | °F at 264 psi | 180 | |
| Melting Point Temp | ASTM D3418 | °C | 255 |
| ASTM D3418 | °F | 491 | |
| Max Continuous Operating Temp | °C | 99 | |
| °F | 210 | ||
| Minimum Operating Temp | °C | -28 | |
| °F | -20 | ||
| Thermal Conductivity | ASTM C117 | BTU-in/ft²-hr-°F | 1.9 |
| ASTM C117 | x 10^4 cal/cm-sec-°C | 6.6 | |
| Flammability Rating | UL94 | NA | HB |
| Electrical | |||
| Property | Test | Unit of Measure | Value |
| Dielectric Strength | ASTM D149 | V/mil | 533 |
| Dielectric Constant at 1 MHz | ASTM D150 | NA | 3.6 |
| Dissipation Factor at 1 MHz | ASTM D150 | NA | 0.02 |
| Surface Resistivity | ASTM D257 | ohm/square | > 10^13 |
| Description | Value | ||
| FDA | Yes | ||
| USDA | Yes | ||
| NSF | No | ||
| 3-A Dairy | No | ||
| Canadian Food Inspection Agency | No | ||
| USP Class VI | No | ||
| Description | Value | ||
| ASTM Shape Spec | ASTM D-6261 S-TPE0211 | ||
| UV Resistant | No | ||
| Machinability | 2 |
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