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Fluoroelastomer is a copolymer of tetrafluoroethylene and propylene. Fluoroelastomer has unique properties compared to traditional FKM-type fluoroelastomers and is suitable for demanding applications such as oil and gas, chemical processes, wires and cables, industrial equipment, food processing, pharmaceuticals, heavy diesel and automotive industries. Fluoroelastomer has excellent weather resistance, heat resistance, acid and alkali resistance, various solvents, ozone and water vapor, especially alkali resistance, which is much better than traditional FKM-type fluoroelastomers. It is classified as FEPM according to ASTM D 1418. and its Chinese name is tetrafluoroethylene rubber.
| Category | Details |
|---|---|
| Composition | – Base Polymer: Tetrafluoroethylene-Propylene copolymer (FEPM, e.g., Aflas®) |
| – Reinforcing Fillers: Carbon black (20–40 phr), PTFE (5–15 phr) | |
| – Plasticizers: Perfluoropolyether oils (optional, 2–8 phr) | |
| – Curing Agents: Peroxide (DCP, 1–3 phr) or bisphenol AF (0.5–2 phr) | |
| Physical Properties | – Hardness (Shore A): 60–90 (ASTM D2240) |
| – Tensile Strength: 12–25 MPa (ASTM D412) | |
| – Elongation at Break: 150–400% (ASTM D412) | |
| – Density: 1.8–2.0 g/cm³ | |
| Thermal Resistance | – Service Temperature: -20°C to +230°C (intermittent 250°C) |
| – Thermal Stability: <5% weight loss at 230°C (24h, ASTM D573) | |
| Chemical Resistance | – Resistant To: Acids, bases, steam, amines, and hydrocarbon fuels |
| – Limitations: Polar solvents (e.g., acetone), ketones, and glycols | |
| Key Applications | – Automotive: Fuel system seals, O-rings, and turbocharger hoses |
| – Chemical Processing: Aggressive media seals and diaphragms | |
| – Oil & Gas: Downhole seals and hydraulic systems | |
| – Semiconductor: Plasma-resistant components and vacuum seals | |
| Processing | – Mixing: High-shear internal mixer (>60°C) or two-roll mill |
| – Molding: Compression/injection molding (200–230°C, 10–25 MPa) | |
| – Curing: Post-cure (250°C, 4–8h) for optimal compression set | |
| Safety & Compliance | – MSDS: Non-flammable (flash point >300°C); avoid inhalation/skin contact |
| – Regulatory: API 6A (oilfield), ISO 10423 (wellhead equipment) | |
| Storage | – Conditions: Dry, <25°C, away from UV/ozone; shelf life 12–18 months |
| – Packaging: Aluminum-lined bags (prevent moisture/contamination) | |
| Quality Control | – Testing: Mooney viscosity (ML 1+4. ASTM D1646), compression set (ASTM D395) |
| – Certifications: ISO 9001 (manufacturing), NORSOK M-710 (oil & gas) |
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