PTFE
The "God of Non-stick"
among plastics
PTFE (Teflon) is a perfluorinated linear polymer, polymerized from tetrafluoroethylene (PTFE) monomers.
It has a fluorine content as high as 76%, making it the progenitor and king of the fluoroplastics family.
Non-stick to Everything
Resistant to all kinds of chemicals
Core Material Advantages
260°C Non-melting
Maintains structural integrity from cryogenic to high heat.
Corrosion Resistant
Inert to virtually all industrial chemicals and solvents.
Non-stick
Extreme non-stick capability even with high-viscosity resins.
0 Friction
One of the lowest coefficients of friction of any solid.
No Precipitation
Low outgassing properties for extreme space environments.
PFA Properties and Key Characteristics
| Property Dimension | Extreme Performance Data |
|---|---|
| Density | 2.14–2.20 g/cm³ |
| Tensile Strength | 20–35 MPa (Flexible rather than rigid) |
| Continuous Service Temp | -269°C to 260°C (Melting Point: 327°C) |
| Coefficient of Friction | 0.04–0.10 (Lowest among plastics, self-lubricating) |
| Chemical Resistance | Resistant to virtually all chemicals (Except molten alkali metals and fluorine gas) |
| Water Absorption | <0.01% (Completely waterproof) |
| Flame Retardancy | UL94 V-0, LOI 95% (Virtually non-flammable) |
| Dielectric Strength | 50–100 kV/mm (Excellent insulation) |
| Thermal Conductivity | 0.25 W/m·K (Low thermal conductivity) |
| Radiation Resistance | >10⁶ rad (Nuclear grade) |
| Advantages (Pros) | Disadvantages (Cons) |
|---|---|
| Ultimate chemical inertness (Resistant to Aqua Regia) | Low mechanical strength (Prone to cold flow) |
| Lowest coefficient of friction (Self-lubricating) | Non-injection moldable (Sintering/Extrusion only) |
| Broad temperature range (-269°C to 260°C) | Low thermal conductivity (Poor heat dissipation) |
| Inherently non-flammable + Low smoke/toxicity | High cost (Approx. 20x the price of standard PE) |
| Electrical insulation + Radiation resistance | Significant creep (Requires fillers) |
| Selection Scenario | Core Value |
|---|---|
| Non-stick Cookware | Lifetime non-stick performance |
| Chemical Anti-corrosion | Resistant even to Aqua Regia |
| High-Temperature Sealing | Zero melting at 260°C |
| Self-lubricating Bearings | Oil-free operation |
| High-Frequency Cabling | Near-zero signal loss |
| Summary: "When all other materials give up, PTFE remains standing." | |
| Advantages (Pros) | Disadvantages (Cons) |
|---|---|
| Combines the "Extreme Performance" of PTFE with the melt-processability of standard plastics. | High Cost (Significantly higher than standard engineering plastics; more expensive than PTFE/FEP). |
| Capable of forming complex precision parts; supports welding/reshaping; high purity and long service life. | Poor Wear Resistance (Low surface hardness, prone to scratching). |
| Broad application range; considered the "Gold Standard" for high-end semiconductor and chemical equipment. | High Processing Temperature (380–400°C); prone to thermal decomposition (releasing HF); high shrinkage rate (3–6%) requiring precision mold control. |
| Excellent structural integrity and chemical inertness across extreme temperature ranges. | Classified as PFAS; subject to tightening global environmental regulations; difficult to recycle; potential yellowing or loss of transparency over long-term exposure. |
Industry Applications
Non-stick Cookware
Tefal-standard PFOA-free coatings for consumer excellence.
Chemical Lining
Internal pump and valve protection against aggressive acids.
5G
Low-loss high-frequency insulation for next-gen communication.
Aerospace Seals
Propellant lines and hydraulic seals for deep space missions.
Medical Implants
Biocompatible Gore-Tex vascular grafts and synthetic membranes.
Reinforced Material
Optimization
While Virgin PTFE is highly versatile, the addition of engineered fillers can increase its wear resistance by up to 1,000 times.
Virgin PTFE
Glass Filled
Bronze Filled
Carbon Filled
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