🧩 PPSU+GF30 – Polyphenylsulfone with 30% Glass Fiber
(An advanced engineering material composed of polyphenylsulfone (PPSU) reinforced with 30% glass fiber. It offers exceptional mechanical strength, extreme thermal stability, and chemical resistance, sustaining temperatures over 200 °C without structural degradation.)
🔹 What is PPSU+GF30
PPSU (Polyphenylsulfone) is a high-performance amorphous polymer known for its outstanding chemical inertness and heat resistance. Reinforced with 30% glass fiber, it becomes a highly rigid material, resistant to thermal shocks, steam, oils, acids, and bases. It maintains precise dimensions even after repeated heating/cooling cycles, making it ideal for the most demanding engine bay components.
🔧 Composition
| Component | Typical Ratio | Role |
| Polyphenylsulfone Matrix | ≈ 70 % | Heat-resistant and chemically inert matrix |
| Glass Fiber (E-Glass) | ≈ 30 % | Increases rigidity, mechanical and thermal strength |
| Additives | < 2 % | Anti-aging and color stability |
🚗 Where PPSU+GF30 is used in the automotive industry
| Component | Example parts | Observations |
| Cooling System Parts | BMW, Mercedes | Resists hot fluids, pressure, and glycols |
| EGR Valves / Pumps | Toyota, Renault | Stable at 220–230 °C without warping |
| High-Current Connectors | Bosch, Valeo | Excellent insulation and current resistance |
| A/C / Refrigerant Lines | VW, Ford | Superior resistance to refrigerants |
🔧 Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | 340 – 370 °C | Requires fine control and dry air (hygroscopic) |
| Heat Plate (Mirror) | 350 – 365 °C | Ideal – Ensures a smooth and strong mechanical bond |
| Plastic Extrusion | 360 °C | Recommended – use matching PPSU or PPSU+GF rod |
🔩 Material Compatibility
- ✅ Compatible: PPSU, PSU, PES (Sulfone family).
- ⚠️ Partially Compatible: PPS, PEEK, PEI (precise thermal control required).
- ❌ Incompatible: PA, PP, PE, PBT, PVC (thermally and chemically incompatible).
💡 ReplastMD Recommendation: Weld at ~360 °C using PPSU+GF or pure PPSU rods in dry conditions. PPSU offers the highest thermal resistance among amorphous polymers, making it perfect for EGR, pump, and cooling systems.
🧠 How to Identify PPSU+GF30
- Engraved marking: > PPSU+GF30 <, > RADEL R <, > ULTRASON P <.
- Texture: Very rigid, satin gloss, fine visible fibers.
- Density: High (~1.60 g/cm³).
- ReplastMD practical test: Produces a clear, metallic sound when tapped. Clean edges when cut, without burrs. Flame: burns with difficulty, faint phenol scent.
🛠️ PPSU+GF30 Welding at ReplastMD:
At our ReplastMD service center (Chisinau, Ciocana sector), we perform professional PPSU+GF30 welding for high-end cooling and sensor components, ensuring a durable, industrial-grade finish.