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GENERAL PROPERTIES
Torlon ® is the highest performing melt processable plastic. It has superior resistance to elevated temperatures. It is capable of performing under severe stress conditions at continuous temperatures to 500°F (260°C). Parts machined from Torlon ® stock shapes provide greater compressive strength and higher impact resistance than most advanced engineering plastics. Its extremely low coefficient of linear thermal expansion and high creep resistance deliver excellent dimensional stability over its entire use range. Torlon ® is an amorphous material with a Tg (glass transition temperature) of 537°F (280°C).
Depending upon the method used to produce a stock shape (sheet, rod, or tube), the properties of the resulting material can vary. Generally speaking, the best mechanical properties are exhibited by injection molded material. However, the process used is generally defined by the size and shape of the desired material. For example, small diameter rod and thin sheets are extruded -- larger shapes are compression molded. See the following descriptions and properties table for details.
TORLON ® BEARING GRADES Torlon ® 4301 - Extruded
Torlon ® 4301 extruded PAI is primarily used for wear and friction parts. It offers a very low expansion rate, low coefficient of friction and exhibits little or no slip-stick in use. Torlon ® 4301's flexural modulus of 1,000,000 psi is higher than most other advanced engineering plastics. This grade excels in severe service wear applications such as non- lubricated bearings, seals, bearing cages and reciprocating compressor parts.Torlon ® 4501 - Compression Molded
Extruded Torlon ® 4301 is typically only available in thin sheets and small diameter rods. Check with us for availability of 4301 in the size you need.
Torlon ® 4501 compression molded PAI is the same formulation as 4301, but has been made into stock shapes using a different manufacturing process. The resulting material is similar to 4301, but has slightly different mechanical properties (see datasheet below).
Compression-molded Torlon ® 4501 is typically available only in larger diameter rods (in short lengths), thicker sheets, and large (but short length) tubes. Check with us for availability of 4501 in the size you need.
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TYPICAL PROPERTIES of TORLON® PAI BEARING GRADES | |||
| ASTM or UL test | Property | Torlon® 4301 Bearing Grade Extruded |
Torlon® 4501 Bearing Grade Compression Molded |
| PHYSICAL | |||
| D792 | Density (lb/in³) (g/cm³) |
0.052 1.45 |
0.052 1.45 |
| D570 | Water Absorption, 24 hrs (%) | 0.40 | 0.30 |
| MECHANICAL | |||
| D638 | Tensile Strength (psi) | 12,000 | 10,000 |
| D638 | Tensile Modulus (psi) | 900,000 | 440,000 |
| D638 | Tensile Elongation at Break (%) | 3 | 3 |
| D790 | Flexural Strength (psi) | 23,000 | 20,000 |
| D790 | Flexural Modulus (psi) | 800,000 | 650,000 |
| D695 | Compressive Strength (psi) | 22,000 | 16,000 |
| D695 | Compressive Modulus (psi) | 950,000 | 359,000 |
| D785 | Hardness, Rockwell | E70(M106) | E70(M106) |
| D256 | IZOD Notched Impact (ft-lb/in) | 0.8 | 0.5 |
| THERMAL | |||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) |
1.4 | 2.0 |
| D648 | Heat Deflection Temp (°F / °C) at 264 psi |
534 / 279 |
534 / 279 |
| D3418 | Glass Transition Temp (°F / °C) | 527 / 275 | 527 / 275 |
| - | Max Operating Temp (°F / °C) | 500 / 260 | 500 / 260 |
| C177 | Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
3.70 12.8 |
3.70 12.8 |
| UL94 | Flammability Rating | V-0 | V-0 |
| ELECTRICAL | |||
| D149 | Dielectric Strength (V/mil) short time, 1/8" thick | - | - |
| D150 | Dielectric Constant at 1 MHz | 5.40 | 5.40 |
| D150 | Dissipation Factor at 1 MHz | 0.042 | 0.042 |
| D257 | Volume Resistivity (ohm-cm)at 50% RH | > 1013 | > 1013 |
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.TORLON is a registered trademark of Solvay Advanced Polymers.
All values at 73°F (23°C) unless otherwise noted.
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Copyright Boedeker Plastics, Inc.
2008