🧩 TPC-ET (COPE) – Thermoplastic Copolyester Elastomer
(A high-performance technical material combining the elasticity of rubber with the strength and thermal stability of polyesters. Known as COPE, it offers exceptional resistance to oils, fuel, mechanical fatigue, and heat up to 180 °C.)
🔹 What is TPC-ET (COPE)
TPC-ET consists of rigid PBT (polybutylene terephthalate) segments and soft polyether segments. At ReplastMD, we treat it as the “heavy-duty” TPE. This structure provides permanent elasticity, dimensional stability, and superior chemical resistance compared to styrene-based or olefinic elastomers. It is the go-to material for high-stress automotive applications like CV boots, high-pressure hoses, and flexible connectors.
🔧 Composition & Properties
- Polymer Base: PBT Segments (~60%) + Polyether Segments (~40%).
- Density: ~ 1.18 – 1.25 g/cm³.
- Operating Range: Constant use up to +180 °C.
- Visuals: Elastic, smooth, semi-glossy; black, grey, or translucent milky white.
- Chemical Group: Thermoplastic Polyester Elastomers.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Flexible Connectors | VW, BMW, Renault | Resistance to oils and automotive fluids |
| Air / Vacuum Hoses | Peugeot, Ford | Elasticity + high thermal stability |
| Brake / Gearbox Boots | Mercedes, Toyota | Fatigue and crack resistance |
| Anti-vibration Elements | Hyundai, Dacia | Wear and abrasion resistance |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | 250 – 270 °C | Clean welding without discoloration |
| Heat Plate (Mirror) | ✅ Recommended | Homogeneous bonding without pores |
| Ultrasonic | ✅ Ideal | Perfect for thin-walled technical parts |
💡 ReplastMD Recommendation: Weld at ~260 °C using digital temperature control or teflon-coated heating plates. TPC-ET (COPE) is ideal for high-resistance hoses, bellows, and gaskets due to its superior combination of elastic and thermal properties.