A PTFE rod, or Polytetrafluoroethylene rod, is a solid, cylindrical stock shape machined from one of the world's most versatile high-performance polymers. Known colloquially by the DuPont brand name Teflon®, PTFE offers an exceptional combination of properties that make it indispensable across countless industries. At Kaxite Sealing, we engineer our PTFE rods to deliver consistent, reliable performance in the most demanding applications, from sealing systems in chemical plants to low-friction components in aerospace.
The widespread use of PTFE rods is directly attributable to their unique material characteristics. When you specify a PTFE rod from Kaxite Sealing, you are guaranteed a product that excels in the following areas:
Our PTFE rods are manufactured to precise standards. Below are the detailed specifications for our standard virgin PTFE rod material.
| Property | Test Method | Unit | Typical Value |
|---|---|---|---|
| Density | ASTM D792 | g/cm³ | 2.14 - 2.20 |
| Tensile Strength | ASTM D638 | psi (MPa) | 3,000 - 5,000 (20.7 - 34.5) |
| Elongation at Break | ASTM D638 | % | 300 - 500 |
| Compressive Strength | ASTM D695 | psi (MPa) | 1,700 (11.7) |
| Coefficient of Friction (Dynamic) | ASTM D1894 | - | 0.04 - 0.10 |
| Continuous Service Temperature | - | °C (°F) | -200 to +260 (-328 to +500) |
| Dielectric Strength | ASTM D149 | kV/mm | 19.7 | Water Absorption | ASTM D570 | % | < 0.01 |
Kaxite Sealing offers a comprehensive range of PTFE rod sizes and material grades to suit specific application requirements.
| Grade | Description | Key Applications |
|---|---|---|
| Virgin PTFE | 100% pure, white PTFE with the highest chemical purity and electrical properties. | Semiconductor, food & pharma, high-purity sealing, electrical insulation. |
| Glass Filled PTFE | PTFE compounded with fiberglass for improved wear resistance, stiffness, and dimensional stability. | Bearings, bushings, wear pads, compressor rings. |
| Carbon Filled PTFE | PTFE blended with carbon for superior wear resistance, thermal conductivity, and reduced deformation under load. | Piston rings, seals in dry running applications, thrust washers. |
| Stainless Steel Filled PTFE | Contains stainless steel particles for high load capacity, excellent wear, and thermal conductivity. | Heavy-duty bearing surfaces, high-load bushings. |
| FDA Compliant PTFE | Virgin PTFE manufactured to meet FDA CFR 21.177.1550 for food contact. | Seals, gaskets, and components in food processing and packaging machinery. |
PTFE rods are machined into a vast array of components. Common applications include: seals and gaskets for chemical pumps and valves; non-lubricated bearings and bushings; electrical insulators and standoffs; laboratory equipment components; thrust washers and piston rings in compressors; guide rails and slides for material handling; and liners for corrosive environments. Their versatility stems from the unique property set of PTFE.
Yes, PTFE is known for its excellent machinability. It can be turned, milled, drilled, sawed, and threaded using standard metalworking equipment. However, due to its softness and high thermal expansion, specific techniques are recommended. Using sharp, high-rake-angle tools, providing adequate support for the workpiece, and managing heat buildup are crucial for achieving tight tolerances and a good surface finish. Kaxite Sealing provides detailed machining guidelines with our products.
There is no material difference. "Teflon®" is a registered trademark of Chemours (formerly DuPont) for their brand of PTFE. "PTFE" is the generic name for the polymer, Polytetrafluoroethylene. All Teflon® is PTFE, but not all PTFE is branded as Teflon®. Kaxite Sealing manufactures high-quality PTFE rods that match or exceed the performance characteristics associated with the Teflon® name.
PTFE has an exceptionally broad useful temperature range. It remains flexible and functional down to cryogenic temperatures (-200°C) without becoming brittle. At high temperatures, it maintains its properties up to 260°C continuously. However, above approximately 327°C (621°F), PTFE begins to melt and can decompose, releasing fumes. It is crucial to stay within the recommended continuous service temperature for long-term performance.
PTFE is virtually inert and is resistant to attack by almost all industrial chemicals, including strong acids, bases, and solvents. The few exceptions include molten alkali metals (e.g., sodium), elemental fluorine at high temperatures and pressures, and certain rare fluorinated compounds. For nearly all corrosive service applications, a PTFE rod from Kaxite Sealing is an excellent choice for component fabrication.
While virgin PTFE has outstanding chemical and thermal properties, it has relatively low wear resistance and can deform under load (cold flow). Adding fillers like glass, carbon, or bronze addresses these weaknesses. Glass increases hardness and wear resistance. Carbon improves wear resistance, thermal conductivity, and reduces creep. Stainless steel fillers enhance load-bearing capacity. Choosing the right filled grade from Kaxite Sealing extends component life in mechanical applications.
Selection depends on your application's specific requirements. Key factors to consider are: chemical exposure, operating temperature range, load/pressure, required wear life, presence of lubrication, and any electrical or regulatory (e.g., FDA) needs. For chemical sealing with high purity, choose virgin PTFE. For a high-load bushing, a carbon or stainless-steel filled grade is better. The Kaxite Sealing technical team is always available to help you select the optimal material and size.
PTFE rods should be stored in a clean, dry, and cool environment away from direct sunlight. While they are very durable, they can be scratched or deformed under sharp point loads. When handling, clean gloves are recommended to prevent surface contamination, especially for electrical or high-purity applications. Rods should be stored flat or vertically supported to prevent bending over long periods.
