Virgin PTFE offers low friction but lacks thermal conductivity and can generate frictional heat buildup in high-speed or unlubricated dynamic applications. Under sustained load, it still creeps and deforms.
If you want to get a more reliable solution, you can choose a graphite-filled PTFE tube. This product, offered by professional factory Taifno, is PTFE compounded with 15% graphite filler.
The graphite particles act as a solid lubricant, reducing the coefficient of friction to 0.14, improving thermal conductivity for heat dissipation, and enhancing wear resistance while maintaining PTFE's universal chemical resistance.
Specifications: Temperature range -180°C to +200°C, tensile strength 25-45 MPa, density 2.1-2.3 g/cm³.
Graphite-filled PTFE tube is manufactured by adding graphite filler (typically 15% by weight) to PTFE resin through compounding, then extruding or molding into tube form.
The graphite particles create a self-lubricating network within the PTFE matrix, providing enhanced thermal and electrical conductivity while reducing friction and wear.
|
Process |
Best For |
Key Feature |
|
Extruded Tube |
Smaller diameters, uniform wall thickness, long lengths |
Consistent dimensions |
|
Molded Tube |
Large diameters, custom sizes, thick walls |
Available in 15% graphite content |
|
Content |
Best For |
Key Benefit |
|
15% Graphite |
Standard graphite filled grade |
Balanced lubricity and strength |
|
Carbon-Graphite Blend |
High-speed dynamic applications |
Enhanced thermal conductivity + wear resistance |
|
Property |
Value |
Test Method |
|
Temperature Range |
-180°C to +200°C |
ASTM D3418 |
|
Density |
2.1-2.3 g/cm³ |
ASTM D792 |
|
Tensile Strength |
25-45 MPa |
ASTM D638 |
|
Elongation at Break |
>200% |
ASTM D638 |
|
Coefficient of Dynamic Friction |
0.14 |
ASTM D1894 |
|
Deformation Under Load |
≤7% (13.7MPa, 24h) |
ASTM D621 |
|
Permanent Deformation |
≤5% (After relaxation) |
ASTM D621 |
|
Linear Thermal Expansion |
8-12 × 10⁻⁵/°C |
ASTM D696 |
|
Volume Resistivity |
10⁶ Ω·cm |
ASTM D257 |
|
Hardness |
Shore D 64+ |
ASTM D2240 |
|
Characteristic |
Benefit |
|
Self-Lubricating |
Graphite acts as a solid lubricant, coefficient of friction 0.14 |
|
Excellent Thermal Conductivity |
Graphite network dissipates frictional heat effectively |
|
Reduced Creep |
Lower deformation under load compared to virgin PTFE |
|
Wear Resistance |
Graphite particles provide a protective lubricating film on mating surfaces |
|
Universal Chemical Resistance |
Retains PTFE's pH 0-14 chemical resistance |
|
Conductive |
Volume resistivity 10⁶ Ω·cm, dissipates static electricity |
|
Non-Stick |
Naturally slippery surface, media does not adhere |
Graphite particles provide a solid lubricant film on mating surfaces, dynamic coefficient of friction as low as 0.14.
Ideal for dry-running and oil-free applications.
Graphite network efficiently dissipates frictional heat, preventing temperature buildup that can damage seals and components in high-speed dynamic service.
Graphite reinforcement reduces deformation under load, deformation ≤7% at 13.7MPa/24h. Maintains dimensional stability over time.
Graphite forms a protective lubricating film between sliding surfaces, significantly extending component life in dynamic applications.
Retains PTFE's pH 0-14 chemical resistance, withstands strong acids, strong alkalis, and most chemical solvents.
Volume resistivity of 10⁶ Ω·cm provides electrical conductivity, making it suitable for applications requiring static dissipation.
|
Industry |
Application |
Why Graphite-Filled |
|
Mechanical Engineering |
Bearings, bushings, thrust washers |
Self-lubricating, low friction |
|
Hydraulics and Pneumatics |
Piston rings, rod packings, rider rings |
Oil-free operation, long wear life |
|
Chemical Processing |
Valve seats, gaskets, mechanical seals |
Chemical resistance + wear resistance |
|
Automotive |
Self-lubricating bushings, sleeve bearings |
High speed, heavy load |
|
Power Generation |
Compressor rings, dynamic seals |
Heat dissipation + low friction |
|
Electrical Equipment |
Anti-static components |
Conductive, dissipates static electricity |
Self-lubricating bearings and bushings for high-speed machinery
Piston rings and rider rings for oil-free compressors
Valve seats and seals in chemical processing equipment
Rod packings for hydraulic cylinders
Thrust washers and wear rings
Anti-static components for electrical equipment
Heat exchanger tubes (PTFE graphite tube heat exchange equipment)
|
Feature |
Virgin PTFE Tube |
Graphite-Filled PTFE Tube |
|
Self-Lubrication |
Excellent |
Excellent, graphite provides lubricating film |
|
Coefficient of Friction |
0.04-0.10 |
0.14 (dynamic) |
|
Thermal Conductivity |
Low |
Good, graphite network dissipates heat |
|
Creep Resistance |
Poor |
Improved, deformation ≤7% |
|
Wear Resistance |
Moderate |
Good, graphite lubricating film |
|
Electrical Conductivity |
Insulating |
Conductive (10⁶ Ω·cm) |
|
Chemical Resistance |
pH 0-14 |
pH 0-14 (retained) |
|
Hardness |
Shore D 50-55 |
Shore D 64+ |
|
Color |
White |
Black / Dark gray |
|
Best For |
General chemical service, static sealing |
Dynamic sealing, high speed, oil-free applications, heat dissipation |
100% Virgin PTFE Resin: no regrind, no recycled material. Consistent quality, batch after batch
Premium Graphite Filler: Uniform dispersion for consistent lubricating and thermal properties
Precision Manufacturing: Extruded and molded processes for consistent dimensions
Full Traceability: Material certificates available on request
Custom Sizes: Custom diameters, lengths, and graphite content available on request
Lead Time: Standard sizes in stock (24-48 hours); custom sizes 5-15 days
A: Choose graphite filled when you need self-lubrication for dynamic applications, heat dissipation, and reduced wear.
Virgin PTFE has excellent low friction but lacks thermal conductivity and can build up frictional heat in high-speed service.
Graphite-filled provides a lubricating film, dissipates heat effectively, and offers improved creep resistance.
Choose graphite-filled for: High-speed dynamic sealing, oil-free compressors, bearing applications, and any application requiring heat dissipation.
Choose virgin PTFE for: Static sealing, clean chemicals, FDA applications, and low-speed service.
A: Temperature: Continuous -180°C to +200°C.
Pressure: Depends on tube design and application, graphite-filled tubes are suitable for moderate to high-pressure dynamic service.
Thermal conductivity: Graphite filler efficiently dissipates frictional heat.
Coefficient of dynamic friction: 0.14.
Chemical: pH 0-14, NOT compatible with strong oxidizers (graphite can oxidize).
For specific data based on your application conditions, please provide your temperature, pressure, and media type.
A: Yes. Graphite-filled PTFE tubes have a volume resistivity of 10⁶ Ω·cm, making them electrically conductive and suitable for applications requiring static electricity dissipation, such as anti-static components in electrical equipment and explosive environments.
The graphite particles create a conductive network within the PTFE matrix that allows static charge to dissipate safely.
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