GENERAL DESCRIPTION
Rulon ® is the Saint Gobain Performance Plastics tradename for a family of reinforced proprietary PTFE compounds. This unique family of materials offers the combination of high compressive strengths, low coefficient of friction, and excellent abrasion and corrosion resistance while running without lubrication. These materials are used in bearing and seal applications at temperature extremes from -400°F to +500°F (-240°C to +260°C) with or without additional lubricants. Rulon ® materials also have the unique property of no "slip stick" --- no erratic motion at low speeds.
Rulon ® 641
This FDA compliant material was specifically developed for food and drug applications. Rulon ® 641 is designed to run dry without any moisture or lubrication. Rulon 641 is WHITE in color.
NOTE: Other specialized Rulon ® grades are also available for chemical environments, higher loads, severe wear, or custom applications. Contact us for more information!
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TYPICAL PROPERTIES of RULON® 641 filled PTFE | ||||
| ASTM or UL test | Property | Rulon® 641 (white) |
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| PHYSICAL | ||||
| D792 | Density (lb/in³) (g/cm³) |
0.081 2.25 |
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| D2240 | Hardness, Shore D | 60 | ||
| D570 | Water Absorption, 24 hrs (%) | 0 | ||
| MECHANICAL | ||||
| D1457 | Tensile Strength (psi) | 2,000 | ||
| D1457 | Tensile Elongation at Yield (%) | 175 | ||
| D256 | IZOD Notched Impact (ft-lb/in) | - | ||
| THERMAL | ||||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) |
varies widely with temperature |
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| Cenco-Fitch | Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
2.60 8.96 |
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| D635 | Flammability (in/min) | None | ||
| ELECTRICAL | ||||
| D149 | Dielectric Strength (V/mil) short time, .08" thick | - | ||
| D150 | Dielectric Constant at 1 MHz | - | ||
| D150 | Dissipation Factor at 1 MHz | - | ||
| D257 | Surface Resistivity (ohm-cm) at 50% RH | - | ||
| D257 | Volume Resistivity (ohm-cm) at 50% RH | - | ||
| RECOMMENDED OPERATING LIMITS | ||||
| Maximum Load (psi) | 1,000 | |||
| Maximum Velocity with No Pressure (ft/min) | 400 | |||
| Maximum PV Rating (psi x ft/min) | 10,000 | |||
| Maximum Operating Temp (°F / °C) | 500 / 260 | |||
| Minimum Operating Temp (°F / °C) | -450 / -240 | |||
| Minimum Mating Surface Hardness (Rockwell) | B25 | |||
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.RULON ® is a registered trademark of Saint-Gobain Performance Plastics Corporation.
All values at 73°F (23°C) unless otherwise noted.
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Copyright Boedeker Plastics, Inc.