🧩 PP+TPE – Polypropylene with Thermoplastic Elastomer
(A flexible composite material combining the structural strength of PP with the elasticity of rubber. The result is a semi-soft, impact-resistant material ideal for automotive protections and “soft-touch” components.)
🔹 What is PP+TPE
PP+TPE is a high-performance engineering blend. At ReplastMD, we treat it as the ultimate solution for vibration damping. By mixing PP (which provides chemical inertness) with TPE (SBS, SEBS, or TPV), the material remains malleable and shock-resistant without losing its dimensional stability. It is perfect for flexible joints between rigid parts and interior elements that require a premium, soft feel.
🔧 Composition & Properties
- Polymer Base: Polypropylene (PP) ~60–80%.
- Elastomer: Thermoplastic Elastomer (TPE/SEBS) ~20–40%.
- Density: ~ 0.95 – 1.05 г/см³.
- Processing Temp: 220 – 250 °C.
- Visuals: Semi-soft, slightly rubbery, low gloss; grey, black, or anthracite.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Gaskets / Edge Protectors | VW, Toyota, Renault | Elasticity + oil resistance |
| Flexible Caps / Shields | BMW, Peugeot | Mechanical damping + cold resistance |
| Soft Interior Trim | Mercedes, Ford | Soft texture, anti-scratch properties |
| Rigid-to-Rubber Joints | Dacia, Hyundai | Perfect PP-TPE co-extrusion |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | 220 – 250 °C | Clean weld, no carbonization |
| Heat Plate (Mirror) | ✅ Recommended | Homogeneous bonding for rigid/flexible areas |
| Chemical Bonding | ⚠️ Restricted | Possible only with PP primers (Loctite® 770 + 406) |
💡 ReplastMD Recommendation: Weld at ~240 °C with controlled hot air. It is ideal for flexible repairs or transition zones between PP and rubber, offering a balance of durability and aesthetic appeal.