🧩 PET+PC – Polyethylene Terephthalate + Polycarbonate

PET+PC is a high-performance composite material that combines the chemical resistance and rigidity of PET with the toughness and impact resistance of polycarbonate (PC). PET+PC is used in technical housings, covers, headlight parts, frames, supports, and connectors, where durability, thermal stability, and a high-quality finish are required.

🔹 What is PET+PC PET+PC is a compatibilized blend between:

  • PET (Polyethylene Terephthalate) – a crystalline polymer, rigid, chemically resistant, and dimensionally stable.
  • PC (Polycarbonate) – an amorphous polymer, highly impact-resistant, tough, and clear. The result is a material balanced between hardness and elasticity, with excellent thermal stability (up to 130 °C) and low shrinkage. It is frequently used in components like Xenoy® or Valox®, produced by SABIC and other suppliers.

🔧 Composition and Properties

  • Composition: 50–70% PET, 30–50% PC.
  • Density: 1.30–1.40 g/cm³.
  • Melting Point: ≈ 230–240 °C.
  • Chemical Resistance: Excellent (oils, fuels, solvents).
  • Continuous Thermal Resistance: 120–140 °C.

🚗 Automotive Applications

  • Technical Housings: ECU cases, sensor covers, brackets (thermal stability and high impact).
  • Headlights / Lighting: Bezels, covers, LED supports (rigid, glossy, UV resistant).
  • Aesthetic Interior/Exterior: Decorative frames and covers (smooth finish, controlled gloss).
  • Electrical Systems: Connector housings, guides (excellent insulation, high durability).

🔧 Welding Temperature and Methods

  • Hot Air: 260 – 280 °C (controlled melting, constant flow).
  • Heat Plate: 250 – 270 °C (clean joint, no deformation).
  • Manual Extrusion: 250 – 270 °C (suitable for thick parts).

🔩 Welding Compatibility

  • ✅ Excellent Compatibility: PET, PC, PBT+PC, PC+PBT, PBT+PET, PET+GF, PC+ABS.
  • ✅ Good Compatibility: PBT+ASA, PETG, PC+ASA.
  • ❌ Incompatible: PP, PE, PS, ABS, PMMA, PVC, PA.

💡 ReplastMD Recommendation: Use PET+PC or PC+PBT welding rod at 270 °C. Heat uniformly and avoid overheating the PC component, as it may form bubbles. You can post-finish the surface with acrylic polish or a quick pass of hot air for a uniform gloss.

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