🧩 PHA+PLA – Bio-Copolymer (PHA + PLA)
(Biodegradable, transparent, and elastic material resulting from a controlled PLA/PHA blend. The copolymer joins PLA’s rigidity with PHA’s malleability, achieving superior impact resistance and increased flexibility.)
🔹 What is PHA+PLA
PHA+PLA is a bio-compatible blend offering transparency, dimensional stability, and total compostability. At ReplastMD, we treat this as a high-performance eco-plastic. PHA reduces the brittleness of pure PLA, increasing its bending and impact strength while maintaining visual gloss and optical clarity. It represents one of the most promising solutions for next-generation sustainable automotive components.
🔧 Composition & Properties
- Polymer Base: Polylactic Acid (PLA) + Polyhydroxyalkanoate (PHA).
- Typical Ratio: 60–80% PLA / 20–40% PHA.
- Density: 1.22 – 1.28 g/cm³.
- Melting Point: 140 – 165 °C.
- Operating Range: –20 °C to +70 °C.
- UV Resistance: Moderate to Good.
🚗 Where PHA+PLA is used in the automotive industry
| Component | Example parts | Observations |
| Bio Interior Trim | Panels, inserts, covers | Glossy, biodegradable, rigid |
| Light Gaskets & Caps | Protectors, plates, decor | Moderate flexibility, clear finish |
| Decorative Films | Translucent sheets, coatings | Clarity and good overall resistance |
| Bio Prototypes | Eco-testing and samples | Easily injectable, glossy finish |
🔧 Welding Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | ✅ 120 – 130 °C | Easy to weld, clean melt, smoke-free |
| Heat Plate (Mirror) | ✅ 130 – 140 °C | Clear, glossy bonding |
| Manual Extrusion | ⚠️ 130 – 150 °C | Possible, but requires fine thermal control |
| Chemical Bonding | ✅ Recommended | Bio-compatible lactide ester adhesives |
💡 ReplastMD Recommendation: PHA+PLA welds most stably at 125 °C, providing a glossy, clean, and transparent joint. Slow cooling and low pressure are recommended to prevent surface cracking of the PLA matrix.