AFLAS® is a high-performance fluoroelastomer, which is a synthetic rubber from the family of tetrafluoroethylene-propylene (TFE/P) copolymers. It is classified under the ASTM standard as FEPM. Its unique combination of properties makes it a material of choice for demanding applications in industries like oil & gas, chemical processing, and automotive.
Basic Properties
Chemical Composition: It is an alternating copolymer of tetrafluoroethylene (TFE) and propylene (P).
Classification: Known by the acronyms FEPM and TFE/P.
Key Feature: It bridges the performance gap where standard fluoroelastomers (FKM, like Viton®) fall short, offering superior resistance in specific harsh environments.
⚙️ Key Performance Advantages
AFLAS® is renowned for several outstanding properties that set it apart from other elastomers:
Superior Chemical Resistance: Its most significant advantage is resistance to strong bases, amines, and caustic substances-environments that rapidly degrade standard FKM. It also offers excellent resistance to strong acids, many solvents, ozone, and hot water/steam.
Excellent Heat Resistance: It can withstand continuous service temperatures of approximately 200°C, with the ability to handle even higher peaks.
Outstanding Electrical Insulation: It has an exceptionally high volume resistivity of 10¹⁶ Ω·cm, which is superior to many other elastomers.
High Purity Options: Special grades, such as AFLAS® 150L, can be formulated for critical applications like semiconductor manufacturing, with low metal content to prevent contamination.
Limitations
AFLAS® is not suitable for all environments. It is generally not recommended for applications involving chlorinated hydrocarbons, aromatic fuels (like toluene), ethers, or ketones, where other materials like FKM or FFKM may perform better.
Main Applications
These properties make AFLAS® ideal for several specific applications:
| Industry | Typical Applications | Key Property Utilized |
|---|---|---|
| Oil & Gas | Downhole seals, O-rings for HPHT (High Pressure, High Temperature) environments | Resistance to H₂S, corrosive gases, steam, and basic drilling muds |
| Chemical Process | Seals for pumps, valves, and butterfly valve linings | Resistance to strong acids, bases, and aggressive chemicals |
| Automotive & Heavy Duty | Seals for heavy-duty diesel engines, oil coolants | Resistance to high temperatures and aggressive additives like amines in oils and coolants |
| Power Generation | Seals in marine engines, steam systems | Resistance to steam, hot water, and corrosion inhibitors in coolants |
| Electrical & Electronics | Wire and cable insulation, electrical connectors | Outstanding electrical insulation properties and heat resistance |
Comparison with FKM (e.g., Viton®) and FFKM
Here is a brief comparison to highlight its position among related materials:
| Feature | AFLAS® (FEPM) | FKM (e.g., Viton®) | FFKM |
|---|---|---|---|
| Resistance to Amines & Bases | Excellent | Poor to Fair (dependent on grade) | Excellent |
| Resistance to Steam / Hot Water | Excellent | Limited; can harden | Excellent |
| Resistance to Hydrocarbons & Solvents | Fair to Poor | Excellent | Excellent |
| Cost Level | Moderate | Lower | Very High |