Covestro Makrolon® 8325 PC Resin
Plastic Granules
Makrolon 8325 PC Resin 20% Glass Fiber-reinforced Grade
Makrolon® 8325 is a 20% glass fiber-reinforced polycarbonate resin engineered for exceptional dimensional stability and high viscosity. Ideal for extrusion and injection molding, it delivers easy release and robust performance in demanding industrial applications. Available exclusively in opaque colors.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate (MVR): 4.0 cm³/10 min (300 °C/1.2 kg, ISO 1133)
- Melt mass-flow rate (MFR): 5.0 g/10 min (300 °C/1.2 kg, ISO 1133)
- Molding shrinkage (parallel): 0.35% (60x60x2 mm³/500 bar, ISO 294-4)
- Molding shrinkage (normal): 0.45% (60x60x2 mm³/500 bar, ISO 294-4)
Mechanical Properties (23 °C/50% r.h.)
- Tensile modulus: 5800 MPa (1 mm/min, ISO 527-1/-2)
- Yield stress: 99 MPa (50 mm/min, ISO 527-1/-2)
- Yield strain: 3.3% (50 mm/min, ISO 527-1/-2)
- Stress at break: 85 MPa (5 mm/min, ISO 527-1/-2)
- Strain at break: 4.4% (5 mm/min, ISO 527-1/-2)
- Flexural modulus: 5300 MPa (2 mm/min, ISO 178)
- Flexural strength: 150 MPa (2 mm/min, ISO 178)
- Charpy impact strength: 60 kJ/m² (23 °C, ISO 179/1eU)
- Charpy notched impact strength: 10 kJ/m² (23 °C/3 mm, ISO 21305 based on ISO 179/1eA)
- Izod notched impact strength: 10 kJ/m² (23 °C/3 mm, ISO 21305 based on ISO 180/A)
- Ball indentation hardness: 144 N/mm² (ISO 2039-1)
Thermal Properties
- Temperature of deflection under load (1.80 MPa): 142 °C (ISO 75-1/-2)
- Temperature of deflection under load (0.45 MPa): 145 °C (ISO 75-1/-2)
- Vicat softening temperature: 149 °C (50 N, 50 °C/h, ISO 306)
- Coefficient of linear thermal expansion (parallel): 0.3 × 10⁻⁴/K (23 to 55 °C, ISO 11359-1/-2)
- Burning behavior (1.5 mm): UL 94 V-2 (UL 94)
- Burning behavior (3.0 mm): UL 94 V-0 (UL 94)
- Oxygen index: 32% (Method A, ISO 4589-2)
Electrical Properties (23 °C/50% r.h.)
- Relative permittivity (100 Hz): 3.3 (IEC 60250)
- Relative permittivity (1 MHz): 3.3 (IEC 60250)
- Dissipation factor (100 Hz): 10 × 10⁻⁴ (IEC 60250)
- Dissipation factor (1 MHz): 90 × 10⁻⁴ (IEC 60250)
- Volume resistivity: 10¹⁴ Ohm·m (IEC 62631-3-1)
- Surface resistivity: 10¹⁶ Ohm (IEC 62631-3-2)
- Electrical strength (1 mm): 36 kV/mm (IEC 60243-1)
- Comparative tracking index (CTI): 175 (Solution A, IEC 60112)
Other Properties (23 °C)
- Water absorption (saturation): 0.24% (Water at 23 °C, ISO 62)
- Water absorption (equilibrium): 0.10% (23 °C, 50% r.h., ISO 62)
- Density: 1340 kg/m³ (ISO 1183-1)
- Glass fiber content: 20% (Method A, ISO 3451-1)
Processing and Drying Conditions
- Melt temperature: 280–320 °C (Recommended)
- Standard melt temperature: 300 °C
- Mold temperature: 80–120 °C
- Drying temperature: 120 °C (Dry air)
- Drying time: 2–3 hours
- Moisture content (max): ≤ 0.02%
Features & Benefits
Unmatched Impact Resistance
With Charpy impact strength of 600 kJ/m² (23°C), Makrolon 8325 withstands heavy shocks, reducing part failure in high-stress environments like automotive components.
Superior Thermal Stability
Deflection temperature of 142°C (1.8 MPa) and VICAT 150°C ensure reliability in high-heat applications, such as electrical housings near heat sources.
Precision Dimensional Control
Low shrinkage (0.35% parallel) and 20% glass fiber reinforcement guarantee tight tolerances for complex industrial parts, minimizing post-processing.
Use & Applications
- Extrusion: Heavy-duty profiles, electrical conduits, and industrial tubing requiring rigidity.
- Injection Molding – Electrical: Connectors, circuit breakers (leveraging CTI 175).
- Injection Molding – Automotive: Under-hood components, sensor housings (heat/impact resistant).
- Injection Molding – Industrial: Gears, pump housings, and enclosures demanding dimensional stability.