Covestro Makrolon® 3105 PC Resin
Makrolon 3105 PC Resin Flame retardant grades
Covestro PC Makrolon 3105 is a high-viscosity, general-purpose polycarbonate resin engineered for injection molding. With an MVR of 6.0 cm³/10 min (300°C/1.2 kg), it ensures easy release and smooth processing. Available in transparent, translucent, and opaque colors, this versatile material delivers reliability across demanding industrial applications.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt Volume-Flow Rate (MVR): 6.0 cm³/10 min (ISO 1133, 300 °C/1.2 kg)
- Melt Mass-Flow Rate (MFR): 6.5 g/10 min (ISO 1133, 300 °C/1.2 kg)
- Molding Shrinkage (Parallel): 0.7 % (ISO 294-4, 500 bar, 60x60x2 mm³)
- Molding Shrinkage (Normal): 0.75 % (ISO 294-4, 500 bar, 60x60x2 mm³)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile Modulus: 2400 MPa (ISO 527-1,-2, 1 mm/min)
- Yield Stress: 66 MPa (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)
- Flexural Modulus: 2400 MPa (ISO 178, 2 mm/min)
- Flexural Strength: 97 MPa (ISO 178, 2 mm/min)
- Charpy Notched Impact Strength (23 °C): 80 kJ/m² (ISO 21305/ISO 179/1eA)
- Charpy Notched Impact Strength (-30 °C): 16 kJ/m² (ISO 21305/ISO 179/1eA)
Thermal Properties
- Glass Transition Temperature: 146 °C (ISO 11357-1,-2)
- Deflection Temperature Under Load (1.80 MPa): 126 °C (ISO 75-1,-2)
- Deflection Temperature Under Load (0.45 MPa): 138 °C (ISO 75-1,-2)
- Vicat Softening Temperature: 145 °C (ISO 306, 50 N, 50 °C/h)
- Coefficient of Linear Thermal Expansion (Parallel/Normal): 0.65 x 10⁻⁴/K (ISO 11359-1,-2, 23-55 °C)
- Burning Behavior: UL 94 V-2 (0.75 mm); UL 94 HB (1.5 mm)
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): 0.0005 (IEC 60250)
- Electrical Strength: 34 kV/mm (IEC 60243-1, 1 mm)
- Volume Resistivity: 1E14 Ohm·m (IEC 62631-3-1)
- Surface Resistivity: 1E16 Ohm (IEC 62631-3-2)
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.)
- Refractive Index: 1.586 (ISO 489)
- Luminous Transmittance (2 mm thickness, Clear): 89 % (ISO 13468-2)
Processing and Drying Conditions
- Melt Temperature (Injection Molding): 290–330 °C (ISO 294)
- Mold Temperature: 80–120 °C
- Dry Air Drying Temperature: 120 °C
- Dry Air Drying Time: 2–3 hours
- Moisture Content (Max): ≤ 0.02 %
- Injection Velocity: 200 mm/s
Features & Benefits
Exceptional Impact Resistance
Makrolon 3105 offers outstanding toughness (80 kJ/m² Charpy notched impact at 23°C), reducing part breakage in high-stress environments like automotive components or protective gear.
High-Temperature Stability
With a heat deflection temperature of 138°C (0.45 MPa), it maintains structural integrity in heated applications such as electrical housings or lighting fixtures.
Design Flexibility & Clarity
Available in multiple color options (including 89% luminous transmittance at 1mm), it enables aesthetically refined, functional parts like transparent covers or consumer electronics.
Use & Applications
- Injection-molded automotive parts (e.g., connectors, interior trim)
- Electrical enclosures requiring flame resistance (UL 94 V-2/HB)
- Consumer goods like tool housings or appliance components
- Transparent industrial shields leveraging optical clarity
- General-purpose components needing impact/temperature resilience
