🧩 TPS+BioFlex – Starch-Based Thermoplastic (BioFlex®)
(Biodegradable and bio-based material obtained by blending thermoplastic starch (TPS) with BioFlex® polyesters. It features a soft, slightly rubbery texture and low density, ideal for lightweight interior covers and flexible bio-inserts.)
🔹 What is TPS+BioFlex
TPS+BioFlex is a bio-hybrid material created from vegetable starch (corn, potato, tapioca) plasticized with glycerol. At ReplastMD, we treat it as a high-end sustainable option for interior components. By combining starch with BioFlex® polyesters, a malleable, elastic, and fully compostable plastic is formed. It is specifically designed for injection molding and thermoforming in the “green” automotive sector.
🔧 Composition & Properties
- Main Phase: Thermoplastic starch (TPS).
- Flexible Components: BioFlex® polyester (PBS/PLA based).
- Density: 1.20 – 1.30 g/cm³.
- Melting Point: 120 – 150 °C.
- Scent: Sweet natural scent (starch/glycerin).
- Operating Range: –10 °C to +70 °C.
🚗 Where TPS+BioFlex is used in the automotive industry
| Component | Example parts | Observations |
| Bio Interior Elements | Caps, gaskets, decorations | Natural feel, pleasant touch |
| Flexible Protectors | Panel inserts, non-structural zones | Flexible and biodegradable |
| Demo Parts | Ecological prototypes | Easy to inject and bio-recycle |
| Aesthetic Trim | Handles, interior covers | Matte finish, odorless |
🔧 Welding Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | ⚠️ 110 – 130 °C | Possible, but high risk of browning/burning |
| Heat Plate (Mirror) | ⚠️ 120 – 130 °C | Slow bonding, uneven melting |
| Manual Extrusion | ❌ Not recommended | Material is extremely heat-sensitive |
| Chemical Bonding | ✅ Recommended | Bio-polyester or modified starch adhesives |
💡 ReplastMD Recommendation: TPS+BioFlex cannot be welded using traditional hot-air methods, as it tends to burn and turn brown. For aesthetic repairs, ReplastMD uses eco-friendly chemical bonding or discreet mechanical fastening.