🧩 CTFE – Polychlorotrifluoroethylene (PCTFE)
(A semi-crystalline fluoropolymer with exceptional chemical, thermal, and radiation resistance. CTFE is a high-end technical material situated between PTFE and PVDF, combining rigidity and dimensional stability with superior barrier properties.)
🔹 What is CTFE
CTFE is the “ultimate barrier” material. At ReplastMD, we treat it as a high-precision polymer for corrosive environments. Its molecular structure, featuring strong carbon-fluorine bonds and chlorine atoms, provides excellent resistance to gas and vapor diffusion. Unlike PTFE, it is much more rigid and resists deformation under load, making it ideal for high-pressure seals, cryogenic components, and advanced sensors.
🔧 Composition & Properties
- Polymer Base: Polychlorotrifluoroethylene (CTFE) 100%.
- Density: ~ 2.10 – 2.15 g/cm³ (very high density).
- Operating Range: -70 °C to +150 °C.
- Chemical Resistance: Exceptional (acids, solvents, oxidative aging).
- Visuals: Rigid, smooth, translucent white or light grey; non-stick surface.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Aggressive Fluid Seals | Toyota, BMW, Renault | Resists acids and thermal oxidation |
| Rigid Sealing Rings | VW, Ford | Stable from -70 to +150 °C |
| Vapor-Proof Linings | Mercedes, Peugeot | Exceptional gas barrier properties |
| Electric Components | Hyundai, Dacia | Superior dielectric insulation |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | 280 – 320 °C | High precision required; avoid heat > 330 °C |
| Heat Plate (Mirror) | ✅ Recommended | Clean, bubble-free, controlled bonding |
| Extrusion | ✅ Possible | Suitable for thin technical parts |
💡 ReplastMD Recommendation: Weld at ~300 °C using controlled air or teflon-coated heating plates. CTFE is ideal for gaskets, rings, and high-precision automotive parts where total chemical resistance and extreme dimensional stability are required.