🧩 ASA+PA – Acrylate Styrene Acrylate + Polyamide (Nylon)
(Hybrid technical material, combining the UV resistance and stability of ASA with the toughness and thermal resistance of polyamide (PA6/PA66). Used in exterior and technical automotive parts that must withstand sun, vibrations, and high temperatures.)
🔹 What is ASA+PA
ASA+PA is a high-performance blend that unites two very different material families:
- ASA – for gloss, UV stability, and aging resistance.
- PA (Polyamide) – for toughness, elasticity, and mechanical/thermal strength.The result is a dimensionally stable, hard, and stress-resistant plastic, used in automotive components exposed to harsh environments — sun, vibrations, heat, and impact. This material is more technical than simple ASA and more weather-stable than pure PA.
🔧 Composition
- ASA (Acrylate Styrene Acrylate) – 40–60 %
- PA6 / PA66 (Polyamide) – 40–60 %
- Chemical Compatibilizers (MAH) – 1–5 %
- Density: 1.08–1.15 g/cm³
- Melting Point: ≈ 250–270 °C
- Thermal Resistance: up to 120 °C.
- UV Resistance: Good to very good.
🚗 Where ASA+PA is used in the automotive industry
| Component | Example parts | Observations |
| Body Exterior | Caps, grilles, frames, sensor housings | High UV + mechanical resistance |
| Engine Bay | Brackets, clips, technical covers | Heat-stable and vibration resistant |
| Technical Interior | Hidden functional elements | Rigid and dimensionally stable |
| Structural Parts | Mixed fasteners and frames | Combined elasticity and toughness |
🔧 Welding Temperature and Methods
| Method | Optimal Temperature | Observations |
| Hot Air | 260 – 280 °C | Requires careful control, uneven melting |
| Heat Plate (Mirror) | 250 – 270 °C | Good for flat joints |
| Manual Extrusion | 240 – 260 °C | Recommended for thick parts |
🔩 What to Weld ASA+PA With (Material Compatibility)
Weldability of ASA+PA is crucial because ASA and PA have different chemical characteristics. Bonding is possible only with compatibilized materials.
✅ Compatible with:
- ASA+PA ↔ ASA+PA / PA6 / PA66 / ASA – ideal combination.
- ASA+PA ↔ ABS+PA / ASA+PC / ASA+PMMA – good compatibility.
- ASA+PA ↔ PA-GF / PA6-GF30 – partially compatible.
❌ Incompatible with:
- PP, PE, TPO, PVC – completely different melting points.
💡 ReplastMD Recommendation:
Use ASA+PA or PA6 rods at a temperature of 270–280 °C. Heat gradually to allow diffusion between ASA and PA phases. Avoid overheating — ASA can turn matte, and PA can oxidize. For structural parts, local reinforcement with mesh or fiber is recommended.
🏭 Manufacturers and Trade Names
- BASF / INEOS: Terblend® N, ASA-PA
- SABIC: Cycolac® ASA-PA
- LG Chem: LUPOY® ASA+PA
- Trinseo: Magnum™ ASA/PA
🧠 How to Identify ASA+PA
- Engraved marking: >ASA+PA<, >PA/ASA<, >TERBLEND N<.
- Semi-glossy or matte surface, hard, with a technical texture.
- Yellow-blue flame, faint acrylic and amide scent.
- Softens at ≈ 270 °C, but does not flow freely.
- High scratch and UV resistance.
🛠️ ASA+PA Welding at ReplastMD:
At our service center in Chisinau (Ciocana sector), ReplastMD performs professional ASA+PA welding for caps, frames, brackets, and technical fasteners, providing UV, vibration, and heat-resistant repairs.