Rulon® 641
Rulon® 641 is a member of the filled PTFE (polytetrafluoroethylene) family and has the unique destinction of having FDA compliant components, along with the ability to withstand nearly all chemicals. It is self-lubricating, has low very low friction and is resistant to heat up to 550 degrees F. Rulon® 641 is off-white in color where its filler was especially developed for use in applications requiring FDA and USDA cleared materials. Significantly, Rulon® 641 contains only USDA accepted and FDA cleared components that are non-toxic and it has been issued a Drug Master File Number from the FDA, allowing incidental contact with body fluids. It is easily machined and is available in rod, sheet, tubing and several standard bearings.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 2.25 | – |
| Tensile Strength @ Yield, 73°F | D638 | 2,000 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | |
| Tensile Elongation (at break), 73°F | D638 | 175 | % |
| Flexural Strength, 73°F | D790 | 600 | psi |
| Flexural Modulus of Elasticity | D790 | psi | |
| Shear Strength, 73°F | D732 | psi | |
| Compressive Strength – Ultimate | 1,000 | psi | |
| Compressive Strength at 2% Deformation | D695 | 1,000 | psi |
| Compressive Strength at 10% Deformation | D695 | psi | |
| Deformation Under Load | % | ||
| Compressive Modulus of Elasticity, 73°F | D695 | ||
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | psi | ||
| Compressive Strength ⊥ to Laminate (Ultimate) | psi | ||
| Hardness, Durometer (Shore “D” scale) | D2240 | 60 | |
| Hardness, Rockwell (Scale as noted) | D785 | Rockwell M | |
| Izod Impact, Notched @ 73°F | D256 Type A | 6.0 | ft.lbs/in. of notch |
| Coefficient of Friction (Dry vs Steel) Static | PTM55007 | 0.10-0.15 | |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | 0.1 | |
| Maximum Static Bearing Load (P) | PTM55007 | 1,000 | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | PTM55007 | 400 | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM55007 | 10,000 | psi x ft/min. |
| Wear Factor “K” x 10-10 | PTM55010 | Cubic in.-min/ft.lbs.hr | |
| Sand Wheel Wear/Abrasion Test | UHMW=100 | ||
| Minimum Mating Surface Hardness | B-25 (64) | Rockwell (Brinnell) | |
| Coefficient of Linear Thermal Expansion | E-831(TMA) | 7.0 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion // to Laminates | E-831(TMA) | in/in/°F x 10-5 | |
| Coefficient of Thermal Expansion I to Laminates | E-831(TMA) | in/in/°F x 10-5 | |
| Softening Point | °F | ||
| Heat Deflection Temperature 264 psi | D648 | 250 | °F |
| Embrittlement Temperature | -400 | °F Min. | |
| Continuous Service Temperature in Air | 550 | °F Max. | |
| Short Term Service Temperature | 550 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | °F | |
| Melting Point (Crystalline) Peak | D3418 | °F | |
| Thermal Conductivity | F433 | 2.6 | BTU-in/(hr/ft2°F) |
| Dielectric Strength Short Term | D149 | 350 | Volts/mil |
| Volume Resistivity | D257 | – | ohm/cm |
| Surface Resistivity | D257 | – | ohm/cm |
| Dielectric Constant, 106 Hz | D150 | 2.5 | |
| Dissipation Factor, 106 Hz | D150 | – | |
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | V-0 | |
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | Nil | % |
| Water Absorption, Immersion Saturation | D570 (2) | Nil | % |
| Machinability Rating | 3 | 1=easy, 10=difficult | |
| Rod Diameter Availability (Off the Shelf) | .500-2.00 | inches | |
| Sheet Thickness Availability (Off the Shelf) | .250-.500 | inches |
| Characteristics / Attributes | FDA Compliant / Self Lubricating / Easily Machined |
