🧩 PPS+CF – Polyphenylene Sulfide + Carbon Fiber
(Ultra-resistant and thermostable material created for extreme applications requiring hardness, rigidity, electrical conductivity, and resistance up to $240$ °C+. A premium composite used in high-precision technical housings.)
🔹 What is PPS+CF
PPS+CF is an elite technical material obtained by reinforcing PPS with $10–30$% carbon fiber. Carbon fibers provide superior rigidity and near-zero warping at high temperatures, along with increased thermal and electrical conductivity. It is lighter than glass-fiber variants and features a high-quality matte-black metallic look. It excels in resistance to oils, fuels, acids, and mechanical pressure.
🔧 Composition & Properties
- Base: $70–90$% Polyphenylene Sulfide (PPS).
- Reinforcement: $10–30$% Carbon Fiber (CF).
- Density: $1.50–1.60$ g/cm³.
- Melting Point: ≈ $285$ °C.
- Chemical Resistance: Exceptional (oils, fuels, solvents).
- Continuous Heat Resistance: $220–250$ °C.
🚗 Where PPS+CF is used in the automotive industry
| Component | Example parts | Observations |
| Engine / Thermal | Covers, valves, pumps, fittings | Stability above $240$ °C, extreme rigidity |
| Electrical / Sensors | Connectors, sensor plates | Good electrical conductivity |
| Fuel / Braking | Pressure or fluid contact parts | Chemically inert, zero deformation |
| Technical Structures | Rigid housings and supports | Low weight, high mechanical strength |
🔧 Welding Temperature and Methods
| Method | Optimal Temp | Observations |
| Hot Air | $310 – 340$ °C | Slow melting, flow control, avoid sparks |
| Plastic Extrusion | $300 – 320$ °C | Requires PPS+CF rod, dense flow |
| Heat Plate (Mirror) | $300 – 320$ °C | Clean bond, no bubbles |
🔩 Material Compatibility
- ✅ Compatible: PPS, PPS+GF, PPS+GF40, PEEK+PPS, PA+PPS, PBT+PPS.
- ⚠️ Good Compatibility: PEI, PES, PSU, PPSU.
- ❌ Incompatible: PP, PE, PS, ABS, PET (completely different melting points).
💡 ReplastMD Recommendation: Use PPS+CF or pure PPS rods at $320$ °C. Heat uniformly and avoid high pressure—the material is rigid and can crack under shear. For the finish, a quick pass with hot air can achieve a uniform matte appearance.
🧠 How to Identify PPS+CF
- Engraved marking: >PPS+CF<, >RYTON CF<, >FORTRON CF30<.
- Texture: Matte black surface with fine metallic reflections.
- ReplastMD practical test: Extremely rigid, slightly conductive. Softens at ≈ $290$ °C. Burns with a blue flame and a faint sulfur scent.
🛠️ PPS+CF Welding at ReplastMD:
At our ReplastMD service center (Chisinau, Ciocana sector), we perform professional PPS+CF welding for high-precision sensor housings and engine components, ensuring a dense finish resistant up to $250$ °C.