Covestro Makrolon® AL2647 PC Resin
Plastic Granules
Makrolon AL2647 Polycarbonate Granules Injection Molding Grade
Covestro Makrolon AL2647 is a medium-viscosity, UV-stabilized polycarbonate resin engineered for automotive lighting. With an MVR of 12 cm³/10 min (300°C/1.2 kg), it offers easy mold release and comes in crystal-clear or vibrant signal colors—perfect for high-precision injection-molded lenses.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate (MVR): 12 cm³/10 min (300 °C/1.2 kg, ISO 1133)
- Melt mass-flow rate (MFR): 13 g/10 min (300 °C/1.2 kg, ISO 1133)
- Molding shrinkage (parallel): 0.7 % (60x60x2 mm³/500 bar, ISO 294-4)
- Molding shrinkage (normal): 0.75 % (60x60x2 mm³/500 bar, ISO 294-4)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus: 2400 MPa (1 mm/min, ISO 527-1,-2)
- Yield stress: 67 MPa (50 mm/min, ISO 527-1,-2)
- Yield strain: 6.1 % (50 mm/min, ISO 527-1,-2)
- Nominal strain at break: > 50 % (50 mm/min, ISO 527-1,-2)
- Flexural modulus: 2400 MPa (2 mm/min, ISO 178)
- Flexural strength: 98 MPa (2 mm/min, ISO 178)
- Charpy notched impact strength (23 °C): 70 kJ/m² (ISO 21305/ISO 179/1eA)
- Puncture impact max force (23 °C): 5400 N (ISO 6603-2)
Thermal Properties
- Glass transition temperature: 144 °C (10 °C/min, ISO 11357-1,-2)
- Deflection temperature under load (1.80 MPa): 123 °C (ISO 75-1,-2)
- Vicat softening temperature (50 N, 50 °C/h): 143 °C (ISO 306)
- Coefficient of linear thermal expansion: 0.65 × 10⁻⁴/K (23–55 °C, ISO 11359-1,-2)
- Burning behavior (0.75 mm): UL 94 V-2 (UL 94)
Electrical Properties (23 °C/50 % r. h.)
- Relative permittivity (100 Hz): 3.1 (IEC 60250)
- Dissipation factor (100 Hz): 0.0005 (IEC 60250)
- Volume resistivity: 1 × 10¹⁴ Ohm·m (IEC 62631-3-1)
- Surface resistivity: 1 × 10¹⁶ Ohm (IEC 62631-3-2)
- Electrical strength: 34 kV/mm (1 mm, IEC 60243-1)
Other Properties (23 °C)
- Water absorption (saturation): 0.30 % (23 °C, ISO 62)
- Density: 1200 kg/m³ (ISO 1183-1)
- Refractive index: 1.587 (Procedure A, ISO 489)
- Luminous transmittance (2 mm): 89 % (ISO 13468-2)
Processing and Drying Conditions
- Melt temperature: 280–320 °C (Recommended: 300 °C)
- Mold temperature: 80–120 °C
- Drying temperature: 120 °C
- Drying time: 2–3 hours
- Moisture content: ≤ 0.02 %
Features & Benefits
Optical Clarity & UV Stability
Achieve >88% light transmission (ISO 13468-2) and near-zero haze (<0.5%) for distortion-free headlamp lenses, even after years of sun exposure. Ensures compliance with automotive safety standards.
Impact Resistance Under Stress
Withstands 60J puncture energy (ISO 6603-2) and 70 kJ/m² notched impact strength (ISO 179) at 23°C. Prevents lens cracking from road debris or thermal shocks.
Thermal & Processing Efficiency
Maintains integrity at 123°C (1.8 MPa load, ISO 75) and flows smoothly at 280–320°C. Easy-release properties cut cycle times by 15% vs. standard PC resins.
Use & Applications
- Automotive forward lighting (e.g., headlamp lenses, fog lights)
- Signal lighting components (brake lights, turn indicators)
- Thin-wall injection-molded covers requiring optical precision and weather resistance
