🧩 PHA+Nodax – Bio-Polyhydroxyalkanoate (Nodax® Kaneka)
(Natural thermoplastic biopolymer material obtained through the bacterial fermentation of vegetable oils. Nodax® PHA by Kaneka Corporation (Japan) is a fully biodegradable P(3HB-co-3HHx) copolymer with remarkable chemical resistance and thermal stability.)
🔹 What is PHA+Nodax
PHA (Nodax®) is a 100% bio-based polymer. At ReplastMD, we treat this as a cutting-edge sustainable material. It is marine-biodegradable, meaning it leaves no trace even in ocean water. Its mechanical properties are comparable to PP and TPE, making it a favorite for eco-friendly interior automotive trim. However, its narrow thermal window makes traditional welding risky, as it degrades rapidly if overheated.
🔧 Composition & Properties
- Polymer Base: P(3HB-co-3HHx) – Nodax®.
- Density: 1.20 – 1.25 g/cm³.
- Melting Point: 165 – 175 °C.
- Operating Range: –20 °C to +80 °C.
- Chemical Resistance: Good (oils, water, alcohol, greases).
- Biodegradability: Full (soil, fresh water, marine environment).
🚗 Where PHA+Nodax is used in the automotive industry
| Component | Example parts | Observations |
| Bio Gaskets & Caps | Trunk trim, interior seals | Ecological, flexible, odorless |
| Light Finishing | Panels, sensor covers | Alternatives to conventional PP/TPE |
| Interior Accents | Handles, decorations | Bio-based and recyclable |
| Thin Films / Layers | Interior membranes | Transparent, malleable, biodegradable |
🔧 Welding Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | ⚠️ 160 – 170 °C | Possible, but high risk of carbonization |
| Heat Plate (Mirror) | ⚠️ 150 – 165 °C | Delicate bonding, requires precision |
| Manual Extrusion | ❌ Not recommended | High risk of thermal degradation |
| Chemical Bonding | ✅ Recommended | Biodegradable polyester adhesives |
💡 ReplastMD Recommendation: PHA+Nodax is not ideal for traditional thermal welding; the material degrades easily at temperatures >180 °C. At ReplastMD, we apply bio-compatible chemical bonding or discreet mechanical fastening for all aesthetic and functional repairs.