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| Performance Indicator | Parameter Range | Advantages & Characteristics |
| Operating Temperature Range | -200°C ~ +260°C | Extremely wide temperature adaptability |
| Coefficient of Friction | 0.04-0.1 | Excellent self-lubrication |
| Chemical Corrosion Resistance | Resists strong acids & alkalis | Highly inert, insoluble in most solvents |
| Insulation Performance | Volume Resistivity >10¹⁸ Ω·cm | Excellent high-frequency insulation |
| Surface Characteristics | Surface Tension 18.5 dyn/cm | Non-stick, hydrophobic |
| Product Category | Typical Applications | Special Requirements |
| Seals | Gaskets, Valve Seats | Corrosion & High-Temp Resistance |
| Bearings/Bushings | Non-lubricated Bearings | Low Coefficient of Friction |
| Insulating Parts | High-Frequency Electronic Components | High Dielectric Strength |
| Anti-corrosion Linings | Chemical Equipment Liners | Corrosion Resistance, Impermeability |
| Performance Indicator | Standard Value | Test Method | Characteristic Description |
| Density | 2.14-2.20 g/cm³ | ISO 1183 | Relatively high for solid materials |
| Melting Point | 327°C | ASTM D3418 | Crystalline Transition Temperature |
| Continuous Service Temperature | -200°C ~ +260°C | ASTM D794 | Short-term up to 300°C |
| Heat Deflection Temp (0.46MPa) | 121°C | ASTM D648 | Performance under low load |
| Coefficient of Linear Expansion | 10-12×10⁻⁵/°C | ASTM D696 | Thermal expansion design consideration |
Mechanical Properties Comparison
Performance |
Pure PTFE |
25% Glass Filled |
15% Graphite Filled |
Test Standard |
Tensile Strength (MPa) |
20-35 |
40-55 |
30-45 |
ASTM D638 |
Elongation at Break (%) |
300-500 |
150-300 |
200-350 |
ASTM D638 |
Flexural Modulus (MPa) |
400-600 |
1200-1800 |
800-1200 |
ASTM D790 |
Compressive Strength (MPa) |
12-15 |
25-35 |
20-28 |
ASTM D695 |
Friction and Wear Characteristics
Parameter |
Value |
Test Conditions |
Dynamic Coefficient of Friction |
0.04-0.10 |
Steel vs. PTFE, Load 0.5MPa |
Static Coefficient of Friction |
0.05-0.12 |
Steel vs. PTFE, Static State |
PV Limit Value |
0.035MPa·m/s |
Continuous operation, non-lubricated |
Wear Amount |
10-50 mg/1000 cycles |
Load 1MPa, Speed 0.5 m/s |
Product Specifications Reference
Type |
Standard Size Range |
Machining Tolerance |
Applicable Process |
Sheet/Plate |
Thickness 1-100mm |
±0.1-0.5mm |
Turning / Cutting |
Rod/Bar |
Φ5-300mm |
±0.05-0.2mm |
Turning / Machining |
Tube/Pipe |
Φ10-500mm |
±0.1% |
Extrusion Molding |
Film Thickness |
0.01-1mm |
±5% |
Biaxial Stretching |
Main Processing Techniques
1. Compression Molding:
· Suitable for simple shapes.
· Process Temperature: 360-380°C
· Pressure: 20-40 MPa
2. Turning/Machining:
· Suitable for high-precision parts.
· Can process films as thin as 0.05mm.
· Dimensional accuracy up to ±0.01mm.
3. Isostatic Pressing:
· For manufacturing large products.
· Avoids internal stress generation.
Industry Application Guide
Industry |
Typical Components |
Typical Components |
Key Requirements |
Chemical |
Sealing Gaskets |
Pure PTFE or Graphite Filled |
Corrosion Resistance, Low Permeability |
Food |
Conveyor Belt Bearings |
FDA-certified Pure PTFE |
Non-toxic, Resistant to Cleaning |
Semiconductor |
Wafer Carriers |
Ultra-high Purity PTFE |
Low Outgassing, Cleanliness |
Medical |
Artificial Joint Components |
Biocompatible Modified PTFE |
Wear Resistance, Bio-inertness |
Application Industries for Custom PTFE Parts
· Chemical Industry: Acid/alkali resistant valves, pump liners, reactor seal parts.
· Food & Pharmaceutical: Non-stick components for food machinery, medical catheters, sterile equipment parts.
· Electronics & Electrical: High-frequency insulating supports, semiconductor equipment components.
· Mechanical Manufacturing: Non-lubricated bearings, guide rails, gears.
· Aerospace: Lightweight seals for high/low temperatures, insulating parts.
Design and Selection Considerations
1. Material Selection:
· Pure PTFE: General purpose, corrosion resistant, but lower mechanical strength.
· Filled PTFE: Enhanced wear resistance, stiffness, or thermal conductivity.
