Covestro Makrolon® 2805 PC Resin
Plastic Granules
Makrolon 2805 Polycarbonate Granules Injection molding Grade
Covestro Makrolon 2805 is a versatile, medium-viscosity polycarbonate resin engineered for injection molding. With an MVR of 9.0 cm³/10 min (300°C/1.2 kg), it offers easy release and excellent processability. Available in transparent, translucent, and opaque colors, it balances performance and efficiency for demanding industrial applications.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate: (ISO 1133, 300 °C/1.2 kg)
- Melt mass-flow rate: (ISO 1133, 300 °C/1.2 kg)
- Molding shrinkage (parallel): (ISO 294-4, 60x60x2 mm³/500 bar)
- Molding shrinkage (normal): (ISO 294-4, 60x60x2 mm³/500 bar)
- Molding shrinkage range (parallel/normal): (ISO 2577, general experience)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus: (ISO 527-1,-2, 1 mm/min)
- Yield stress: (ISO 527-1,-2, 50 mm/min)
- Yield strain: 6.2% (ISO 527-1,-2, 50 mm/min)
- Nominal strain at break: >50% (ISO 527-1,-2, 50 mm/min)
- Tensile creep modulus (1 h): 2200 MPa (ISO 899-1)
- Tensile creep modulus (1000 h): 1900 MPa (ISO 899-1)
- Flexural modulus: 2400 MPa (ISO 178, 2 mm/min)
- Flexural strength: 97 MPa (ISO 178, 2 mm/min)
- Charpy notched impact strength (23 °C, 3 mm): 75kJ/m² (ISO 21305/based on ISO 179/1eA)
- Charpy notched impact strength (-30 °C, 3 mm): (ISO 21305/based on ISO 179/1eA)
Thermal Properties
- Glass transition temperature: 145 °C (ISO 11357-1,-2)
- Temperature of deflection under load (1.80 MPa): 125 °C (ISO 75-1,-2)
- Temperature of deflection under load (0.45 MPa): 137 °C (ISO 75-1,-2)
- Vicat softening temperature (50 N, 50 °C/h): 144 °C (ISO 306)
- Burning behavior: UL 94 V-2 (0.75 mm), UL 94 HB (2.5 mm)
- Oxygen index: 28% (ISO 4589-2)
Electrical Properties (23 °C/50 % r. h.)
- Relative permittivity (100 Hz): 3.1 (IEC 60250)
- Relative permittivity (1 MHz): 3.0 (IEC 60250)
- Dissipation factor (100 Hz): 5 x 10⁻⁴ (IEC 60250)
- Electrical strength: (IEC 60243-1)
Other Properties (23 °C)
- Density: 1200 kg/m³ (ISO 1183-1)
- Water absorption (saturation): 0.30% (ISO 62, Water at 23 °C)
- Water absorption (equilibrium): 0.12% (ISO 62, 23 °C; 50 % r. h.)
- Luminous transmittance (2 mm thickness): 89% (ISO 13468-2)
Processing and Drying Conditions
- Melt temperature range: 280 to 320°C
- Standard melt temperature: 300 °C
- Mold temperature range: 80 to 120 °C
- Drying temperature: 120 °C120
- Drying time: 2 to 3 h
- Moisture content (max): ≤0.02%
Features & Benefits
Exceptional Impact Resistance
Makrolon PC 2805 Polycarbonate Granules deliver unmatched toughness, with >50% nominal strain at break and puncture energy up to 65 J. This reduces part failure in high-stress environments, ensuring longevity for automotive or protective gear.
Reliable High-Temperature Stability
With a heat deflection temperature of 125°C (1.8 MPa) and Vicat softening at 144°C, it maintains structural integrity under thermal stress. Ideal for electrical components near heat sources or outdoor equipment exposed to extreme climates.
Superior Electrical Safety
It boasts volume resistivity of 1E14 Ω·m, CTI 250 rating, and UL94 V-2/HB flammability compliance. Prevents short circuits and meets strict standards for electronics, connectors, and industrial enclosures.
Use & Applications
- Electrical: Switches, enclosures, connectors (UL/CTI certified).
- Automotive: Dash components, lighting covers, impact-resistant trims.
- Industrial: Transparent machine guards, tool housings, safety visors.
- Consumer Goods: Durable appliance housings, transparent containers.
- General Engineering: Gears, bushings, and structural components.
