🧩 PHA+PBS – Bio-Copolymer (PBS + PHA)
(Advanced biodegradable material resulting from a blend of PBS (polybutylene succinate) and PHA (polyhydroxyalkanoate). It combines the mechanical and thermal resistance of PBS with the elasticity and flexibility of PHA.)
🔹 What is PHA+PBS
PHA+PBS is a bio-hybrid copolymer that unites two complementary bioplastic families. At ReplastMD, we treat it as a biodegradable elastomer. PBS provides structural rigidity and heat stability, while PHA adds softness and flexibility. The result is a material with optimized mechanical properties that is easy to inject and weld at moderate temperatures, ideal for eco-friendly gaskets and interior inserts.
🔧 Composition & Properties
- Polymer Base: PBS + PHA.
- Density: 1.22 – 1.26 g/cm³.
- Melting Point: 110 – 125 °C.
- Operating Range: –25 °C to +85 °C.
- Chemical Resistance: Good (oils, water, detergents).
- UV Resistance: Moderate.
🚗 Where PHA+PBS is used in the automotive industry
| Component | Example parts | Observations |
| Bio Flexible Gaskets | Covers, protectors, panels | Elasticity + thermal stability |
| Bio Decorative Trim | Inserts, plates, sensor covers | Glossy, compostable, aesthetic |
| Technical Bio Films | Interior flexible layers | Fully biodegradable and malleable |
| Demo Bio Parts | Prototypes and test components | Durable and easily injectable |
🔧 Welding Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | ✅ 110 – 130 °C | Easy to weld, uniform melting |
| Heat Plate (Mirror) | ✅ 120 – 130 °C | Smooth, glossy bond |
| Manual Extrusion | ⚠️ 130 – 140 °C | Possible, but requires careful control |
| Chemical Bonding | ✅ Recommended | Bio-compatible polyester adhesives |
💡 ReplastMD Recommendation: PHA+PBS welds excellently at 120 °C, combining the melting ease of PBS with the bio-flow of PHA. The resulting joint is clear, glossy, and elastic, perfect for high-quality sustainable components.