🧩 PP+Daplen – Daplen® Polypropylene (Automotive TPO Blend)
(Weldable elastic-rigid OEM plastic, widely used in car bumpers, protectors, and flexible body elements)
🔹 What is PP+Daplen
Daplen® is a thermoplastic olefin-modified polypropylene (TPO) brand produced by Borealis, exclusively for the automotive industry.
PP+Daplen combines the mechanical strength of polypropylene with the elasticity of TPO, resulting in a durable, flexible, and impact-resistant material, perfect for OEM bumpers and spoilers. It is considered a premium material in body compositions due to its stable behavior under temperature variations and high resistance to UV aging.
🔧 Composition
- PP (Polypropylene) – structural thermoplastic base
- TPO (Thermoplastic Olefin) – elastomeric component (EPDM + POE)
- Daplen® Additives – UV stabilizers, anti-scratch agents, compatibilizers, technical colorants
- Common types: Daplen® EE158AE, ED230HP, ED255AE
🚗 Where PP+Daplen is used in the automotive industry
| Component | Example parts | Observations |
| Body / Exterior | Bumpers, spoilers, side extensions | Borealis standard OEM material |
| Technical Interior | Side panels, mounts, trims | Matte surface, scratch-resistant |
| Engine Compartment | Covers, lower protectors | Thermally stable, semi-elastic |
| Aftermarket / Tuning | Flexible sport parts, air diffusers | Easy to paint, original matte finish |
🔧 Welding temperatures and methods
| Method | Optimal temperature | Observations |
| Hot air | 270 – 290 °C | Uniform melting, no bubbles |
| Heat plate (mirror) | 260 – 280 °C | Clean and controlled bonding |
| Manual extrusion | 250 – 270 °C | Ideal for long cracks or broken corners |
| Ultrasonic | — | Industrial use only |
🔩 What to weld PP+Daplen with (Material compatibility)
The question “what to weld PP+Daplen with” frequently arises in OEM repairs. Being a PP-TPO blend, the material welds best with other elastically modified PP compositions.
✅ Compatible:
- PP+Daplen ↔ PP+Daplen – ideal combination (perfect OEM)
- PP+Daplen ↔ PP+TPO / PP+EPDM / PP+TPV – excellent compatibility
- PP+Daplen ↔ PP-C / PP-H / PP-HI – compatible, but more rigid
- PP+Daplen ↔ PP-TD20 / PP-MD20 – partially compatible (shrinkage differs)
❌ Incompatible:
- PE, ABS, ASA, PC, PA, PVC – different melting points, will not bond
💡 ReplastMD Recommendation:
Use PP-TPO or PP-EPDM welding rods at a temperature of 275–285 °C. Clean the area with plastic degreaser and ensure simultaneous melting for an invisible and elastic weld.
🏭 Manufacturers and trade names
| Manufacturer | Brand / Series | Country / Region |
| Borealis | Daplen® TPO Series | Austria |
| LyondellBasell | Hostacom® TPO | Germany / Netherlands |
| SABIC | PP-TPO Compound | Netherlands / Global |
| Hyundai EP | Polytron® TPO | South Korea |
🧠 How to identify PP+Daplen
- Engraved marking: >PP-TPO<, >PP-Daplen< or >TPO<
- Matte surface, fine texture, with anti-scratch properties
- Yellow-blue flame, faint paraffin smell
- Softens uniformly at 275 °C, no bubbles
- Partially floats in water (density < 1 g/cm³)
🛠️ PP+Daplen Welding at ReplastMD:
At our service center in Chisinau (Ciocana sector), ReplastMD performs professional Daplen® welding for:
- Borealis OEM bumpers and spoilers
- TPO flexible parts with PP blend
- restoration of mounts and broken corners
- original matte finish, ready for painting