🧩 PET+GF30 – Glass Fiber Reinforced PET (30%)
(A reinforced technical polyester based on Polyethylene Terephthalate (PET), strengthened with 30% glass fiber for high mechanical strength and excellent dimensional stability. Designed for components requiring heat resistance up to 155 °C.)
🔹 What is PET+GF30
PET+GF30 belongs to the semi-crystalline polyester family. At ReplastMD, we treat it as a structural powerhouse. By adding 30% glass fiber, the material becomes much more rigid and dimensionally stable, even in high-temperature or high-humidity environments. Compared to PBT, it offers lower shrinkage and a superior gloss finish, although it requires a higher processing temperature.
🔧 Composition & Properties
- Polymer Base: Polyethylene terephthalate (PET) ~70%.
- Reinforcement: Glass Fiber (GF) ~30%.
- Density: ~ 1.55 – 1.65 g/cm³.
- Operating Range: Constant use up to +155 °C.
- Chemical Resistance: Excellent (oils, fuels, hot fluids).
- Visuals: Very rigid, smooth; grey, black, or pearlescent beige.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Valve Housings | VW, Toyota, Renault | Thermal resistance + electrical insulation |
| EGR / Pump Covers | BMW, Ford | Resistance to hot oils and fluids |
| Mounts / Clips / Rods | Mercedes, Peugeot | High rigidity and dimensional stability |
| Structural Rigid Parts | Dacia, Hyundai | Maintains shape under load and vibration |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | 260 – 280 °C | Clean welding without burning |
| Heat Plate (Mirror) | ✅ Recommended | Uniform bonding without pores |
| Chemical Bonding | ⚠️ Restricted | Requires specialized polyester primers (Loctite® 770 + 406) |
💡 ReplastMD Recommendation: Weld at ~270 °C using digital temperature control or teflon-coated heating plates. PET+GF30 is ideal for structural automotive parts, housings, and connectors where stiffness and fluid resistance are critical.