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ERTALYTE® & ERTALYTE® TX (PET)
Ertalyte is an unreinforced, semi-crystalline thermoplastic polyester based on polyethylene terephthalate (PET-P). It is manufactured from proprietary resin grades made by Quadrant EPP. It is characterized as having the best dimensional stability coupled with excellent wear resistance, low coefficient of friction, high strength, and resistance to moderately acidic solutions.
Ertalyte's properties make it especially suitable for the manufacture of precision mechanical parts which are capable of sustaining high loads and enduring wear conditions. Ertalyte's continuous service temperature is 210°F (100°C) and its melting point is almost 150°F higher than acetals. It retains significantly more of its original strength up to 180°F (85°C) than nylon or acetal.
Ertalyte TX (PET-P with Solid Lubricant)
Ertalyte TX is an internally lubricated thermoplastic polyester providing enhanced wear and inertness over general purpose nylon (PA) and acetal (POM) products. Containing uniformly dispersed solid lubricant, Ertalyte TX provides a lower wear rate and coefficient of friction than unmodified polyesters like PET or PBT and even internally lubricated materials like Delrin AF blend.
Key Benefits
- Outstanding wear resistance
- Non-staining
- Excellent dimensional stability
- FDA compliance
- High LPV
- Low and constant coefficient of friction (low slip/stick)
- Low water absorption
- Easy to Machine
Applications
- Linear bearings
- Wear & slide pads
- Dynamic seals
- Scraper blades
- Thrust washers
- Valve seals
- Rollers & wheels without bearings
- Journal bearings
In addition, Ertalyte PET-P offers good chemical and abrasion resistance. Its low moisture absorption enables mechanical and electrical properties to remain virtually unaffected by moisture. Ertalyte PET-P can be machined to precise detail on standard metal working equipment.
Ertalyte® PET-P
| Property | Method | Unit | Value |
| Mechanical | |||
| Specific Gravity, 73°F | D792 | 1.41 | |
| Tensile Strength, 73°F | D638 | psi | 12,400 |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | 460,000 |
| Elongation, 73°F | D638 | % | 20.0 |
| Flexural Strength, 73°F | D790 | psi | 18,000 |
| Flexural Modulus, 73°F | D790 | psi | 490,000 |
| Shear Strength, 73°F | D732 | psi | 8,000 |
| Compressive Strength, 10% Def., 73°F | D695 | psi | 15,000 |
| Compressive Modulus of Elasticity, 73°F | D695 | psi | 420,000 |
| Hardness, Rockwell, Scale as noted, 73°F | D785 | M93 (M125) | |
| Hardness, Durometer, Shore D scale, 73°F | D2240 | D87 | |
| Izod Impact (notched), 73°F | D256 Type A | ft-lb/in | 0.5 |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | 0.20 | |
| Limiting PV, 73°F | PTM55007 | psi-fpm | 2,800 |
| k (wear) factor | PTM55010 | 60 | |
| Thermal | |||
| Coefficient of linear Thermal Expansion | E-831(TMA) | in/in/°F | 3.30x10ˆ-5 |
| Deflection Temperature 264 psi | D648 | °F | 240 |
| Melting Point (crystalline) peak | D3418 | °F | 491 |
| Continuous Service Temperature in Air (Max.) | °F | 210 | |
| Thermal Conductivity | BTU-in/(hr-ft²°F) | 2.00 | |
| Electrical | |||
| Dielectric Strength, Short Term | D149(2) | Volts/mil | 385 |
| Surface Resistivity | EOS/ESD S11.11 | Ohm/square | >10ˆ13 |
| Chemical | |||
| Acids, Weak, 73°F/23°C, acetic acid, dilute hydrochloric or sulfuric | Acceptable Service | ||
| Acids, Strong, 73°F/23°C, conc. hydrochloric or sulfuric | Limited Service | ||
| Alkalies, Weak, 73°F/23°C, dilute ammonia or sodium hydroxide | Acceptable Service | ||
| Alkalies, Strong, 73°F/23°C, conc. ammonia or sodium hydroxide | Unacceptable | ||
| Hydrocarbons-Aromatic, 73°F/23°C, benzene, toluene | Acceptable Service | ||
| Hydrocarbons-Aliphatic, 73°F/23°C, gasoline, hexane, grease | Acceptable Service | ||
| Ketones, Esters, 73°F/23°C, acetone, methyl ethyl ketone | Acceptable Service | ||
| Ethers, 73°F/23°C, diethyl ether, tetrahydrofuran | Acceptable Service | ||
| Chlorinated Solvents, 73°F/23°C, methylene chloride, chloroform | Unacceptable | ||
| Alcohols, 73°F/23°C, methanol, ethanol, anti-freeze | Acceptable Service | ||
| Inorganic Salt Solutions, 73°F/23°C, sodium chloride, potassium cyanate | Acceptable Service | ||
| Continuous Sunlight, 73°F/23°C | Limited Service | ||
| Miscellaneous | |||
| Water Absorption Immersion, 24 hr | D570 | % | 0.07 |
| Water Absorption Immersion, Sat. | D570 | % | 0.90 |
| Ionic Impurities - Na (Sodium) | Total Digestion | ppm | 0.50 |
| Ionic Impurities - K (Potassium) | Total Digestion | ppm | 0.10 |
| Outgassing TML (Total Mass Loss) | E595 | % | 0.10 |
| CVCM (Collected Volatile Condensable Material) | E595 | % | 0.00 |
| Compliance | |||
| UL94 | HB | ||
| FDA | Yes | ||
| USDA | Yes | ||
| 3A-Dairy | Yes | ||
| Canada AG | Yes | ||
Ertalyte® TX
| Property | Method | Unit | Value |
| Mechanical | |||
| Specific Gravity, 73°F | D792 | 1.44 | |
| Tensile Strength, 73°F | D638 | psi | 11,000 |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | 500,000 |
| Elongation, 73°F | D638 | % | 5.0 |
| Flexural Strength, 73°F | D790 | psi | 14,000 |
| Flexural Modulus, 73°F | D790 | psi | 360,000 |
| Shear Strength, 73°F | D732 | psi | 8,500 |
| Compressive Strength, 10% Def., 73°F | D695 | psi | 15,250 |
| Compressive Modulus of Elasticity, 73°F | D695 | psi | 400,000 |
| Hardness, Rockwell, Scale as noted, 73°F | D785 | M94 | |
| Izod Impact (notched), 73°F | D256 Type A | ft-lb/in | 0.4 |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | 0.19 | |
| Limiting PV, 73°F | PTM55007 | psi-fpm | 6,000 |
| k (wear) factor | PTM55010 | 35 | |
| Thermal | |||
| Coefficient of linear Thermal Expansion | E-831(TMA) | in/in/°F | 4.50x10ˆ-5 |
| Deflection Temperature 264 psi | D648 | °F | 180 |
| Melting Point (crystalline) peak | D3418 | °F | 491 |
| Continuous Service Temperature in Air (Max.) | °F | 210 | |
| Thermal Conductivity | BTU-in/(hr-ft²°F) | 1.90 | |
| Electrical | |||
| Surface Resistivity | EOS/ESD S11.11 | Ohm/square | >10ˆ13 |
| Chemical | |||
| Acids, Weak, 73°F/23°C, acetic acid, dilute hydrochloric or sulfuric | Acceptable Service | ||
| Acids, Strong, 73°F/23°C, conc. hydrochloric or sulfuric | Limited Service | ||
| Alkalies, Weak, 73°F/23°C, dilute ammonia or sodium hydroxide | Acceptable Service | ||
| Alkalies, Strong, 73°F/23°C, conc. ammonia or sodium hydroxide | Unacceptable | ||
| Hydrocarbons-Aromatic, 73°F/23°C, benzene, toluene | Acceptable Service | ||
| Hydrocarbons-Aliphatic, 73°F/23°C, gasoline, hexane, grease | Acceptable Service | ||
| Ketones, Esters, 73°F/23°C, acetone, methyl ethyl ketone | Limited Service | ||
| Ethers, 73°F/23°C, diethyl ether, tetrahydrofuran | Acceptable Service | ||
| Chlorinated Solvents, 73°F/23°C, methylene chloride, chloroform | Unacceptable | ||
| Alcohols, 73°F/23°C, methanol, ethanol, anti-freeze | Acceptable Service | ||
| Inorganic Salt Solutions, 73°F/23°C, sodium chloride, potassium cyanate | Acceptable Service | ||
| Continuous Sunlight, 73°F/23°C | Limited Service | ||
| Miscellaneous | |||
| Water Absorption Immersion, 24 hr | D570 | % | 0.06 |
| Water Absorption Immersion, Sat. | D570 | % | 0.47 |
| Ionic Impurities - Na (Sodium) | Total Digestion | ppm | 2.00 |
| Ionic Impurities - K (Potassium) | Total Digestion | ppm | 12.00 |
| Ionic Impurities - Fe (Iron) | Total Digestion | ppm | 8.00 |
| Compliance | |||
| UL94 | HB | ||
| FDA | Yes | ||
| USDA | Yes | ||
| 3A-Dairy | Yes | ||