🧩 PC+PBT+GF30 – Polycarbonate + PBT 30% Glass Fiber
(High-performance technical composite material, made of a blend of Polycarbonate (PC) and Polybutylene Terephthalate (PBT), reinforced with 30% glass fiber (GF30). Used in automotive components exposed to high temperatures, mechanical stress, and vibrations.)
🔹 What is PC+PBT+GF30
PC+PBT+GF30 combines the advantages of both polymer bases:
- Polycarbonate (PC) offers toughness and impact resistance,
- PBT brings thermal stability and chemical resistance,
- Glass Fiber (GF30) increases rigidity and resistance to deformation.
It is used in car parts where ABS or PC+ABS lacks thermal resistance, but pure PBT would be too brittle.
🔧 Composition
| Component | Typical Proportion | Role |
| Polycarbonate (PC) | 35–40 % | Hardness and impact resistance |
| PBT | 30–35 % | Thermal and chemical stability |
| Glass Fiber (GF30) | 30 % | Reinforcement, rigidity, dimensional stability |
| Additives | < 5 % | Thermal protection, finish, fire safety |
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Sensor / ECU Housings | Bosch, Valeo, Siemens units | Rigid, stable at 130–150 °C |
| Electrical Connectors | Plugs, fuse holders | Excellent dielectric properties |
| Engine Bay Parts | EGR components, intercooler mounts | Heat resistant |
| Rigid Structures | Consoles, screw guides | Low shrinkage |
🔩 What to Weld with (Material Compatibility)
- PC+PBT, Xenoy®, Valox® ✅ — Weldable (with precise temperature control).
- PC+ABS, PBT+GF30 ⚠️ — Partially compatible (PC+PBT rod recommended).
- PBT, PC, PC+GF30 ⚠️ — Partially compatible (different melting points).
- PP, PE, PA, PVC, PET ❌ — Chemically and thermally incompatible.
🏭 Manufacturers and Trade Names
- SABIC: Xenoy® GF30 / Xenoy® HTX
- DuPont: Crastin® PC/PBT GF30
- BASF: Ultradur® B4520 GF30 (PC/PBT blend)
🧠 How to Identify
- Marking:
>PC+PBT+GF30<,>Xenoy-GF30<,>Valox-GF30<. - Texture: Fine, dense, with visible fibers on broken edges.
- Density: ~1.38–1.45 g/cm³
- ReplastMD practical test: Clean flame, self-extinguishes, faint aromatic (PC) scent. Rigid surface, very thermally stable, sharp edges when broken.
🛠️ Welding at ReplastMD:
- Heat Plate (Mirror): 250 – 270 °C (Precise, slow, uniform welding).
- Ultrasonic / Vibration: ✅ Recommended (Ideal for rigid housings).
💡 ReplastMD Recommendation: Welding is performed with controlled hot air or ultrasonic methods, using PC+PBT (Xenoy®) rods. Avoid overheating — PBT degrades easily under excessive heat.