🧩 PA+PC – Polyamide + Polycarbonate Blend
(High-performance technical blend combining the mechanical and thermal resistance of polyamide (PA6 / PA66) with the toughness and dimensional stability of polycarbonate (PC). Used in technical parts, housings, and connectors where hardness and impact resistance are required.)
🔹 What is PA+PC
PA+PC is a polymer alloy (blend) of polyamide and polycarbonate, achieved through controlled compatibilization. The result is a material with high toughness, impact resistance, thermal stability, and lower moisture absorption compared to pure PA. Due to its hybrid structure, PA+PC is used in sensor housings, structural parts, and electrical connectors.
🔧 Composition
- Polyamide (PA6 / PA66): 50–70 %
- Polycarbonate (PC): 30–50 %
- Additives: UV/thermal stabilizers, compatibilizers, glass fibers (optional).
- Density: 1.15–1.25 g/cm³.
- Melting Point: ≈ 250–270 °C.
- Chemical Resistance: Very good (oils, fuels, mild solvents).
- Continuous Heat Resistance: 120–140 °C.
🚗 Where PA+PC is used in the automotive industry
| Component | Example parts | Observations |
| Engine / Technical | Covers, housings, sensors | Heat and vibration resistance |
| Electrical / Connect. | Plugs, plates, clips | Thermal insulation and good rigidity |
| Interior | Functional covers and frames | Glossy finish, scratch resistance |
| Protected Exterior | Semi-structural elements | UV and impact stability |
🔧 Welding Temperature and Methods
| Method | Optimal Temperature | Observations |
| Hot Air | 260 – 280 °C | Uniform melting, requires careful control |
| Heat Plate (Mirror) | 250 – 270 °C | Clean and solid joint |
| Manual Extrusion | 250 – 270 °C | Ideal for thick or technical parts |
🔩 What to Weld PA+PC With (Material Compatibility)
Compatibility is high with PA and PC-based blends, making it a versatile material in hybrid repairs.
✅ Compatible with:
- PA+PC ↔ PA6 / PA66 / PC / ABS+PC / PA+GF / PC+ABS – excellent.
- PA+PC ↔ PBT / PET / PA66/6 / PA+ASA – partially compatible.
❌ Incompatible with:
- PP, PE, PVC, PS, pure ASA – different melting points.
💡 ReplastMD Recommendation:
Use PA+PC or ABS+PC rods (Bayblend®, Cycoloy®) at 265–275 °C. Maintain constant airflow and avoid overheating the polycarbonate (it can form bubbles). Allow for slow cooling after welding to prevent internal stresses.
🏭 Manufacturers and Trade Names
- SABIC: Cycoloy®
- Covestro: Bayblend® PA/PC
- LG Chem: LUPOY® PA+PC
🧠 How to Identify PA+PC
- Engraved marking: >PA+PC<, >PA/PC<, >Bayblend<, >Cycoloy<.
- Semi-glossy surface, rigid, dense.
- Blue flame with a faint nylon and phenol smell.
- Softens at ≈ 260 °C.
- ReplastMD practical test: If the part is rigid, slightly glossy, dense, and marked >PA+PC<, it is a confirmed Polyamide + Polycarbonate blend.
🛠️ PA+PC Welding at ReplastMD:
At our ReplastMD service center (Chisinau, Ciocana sector), we perform professional PA+PC welding for technical housings and structural connectors, ensuring a solid, durable finish under high mechanical stress.