Covestro Bayblend® M750 PC/ABS
Plastic Granules
Bayblend® M750 PC/ABS Resin
Bayblend M750 is a high-performance (PC+ABS) blend engineered for medical applications. It offers an excellent balance of impact strength, thermal resistance (Vicat 126°C), and processability, designed to meet certain requirements of ISO 10993-1.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate: 11 cm³/10 min (260 °C/5 kg, ISO 1133)
- Melt viscosity: 265 Pa·s (1000 s⁻¹, 260 °C, ISO 11443-A)
- Molding shrinkage, parallel: 0.7–0.9 % (60x60x2 mm³, 260 °C/MT 80 °C/500 bar, ISO 294-4)
- Molding shrinkage, normal: 0.7–0.9 % (60x60x2 mm³, 260 °C/MT 80 °C/500 bar, ISO 294-4)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus: 2000 MPa (1 mm/min, ISO 527-1,-2)
- Yield stress: 47 MPa (50 mm/min, ISO 527-1,-2)
- Yield strain: 4.8 % (50 mm/min, ISO 527-1,-2)
- Nominal strain at break: > 50 % (50 mm/min, ISO 527-1,-2)
- Izod notched impact strength (23 °C): 45 kJ/m² (ISO 180/A)
- Izod notched impact strength (-30 °C): 35 kJ/m² (ISO 180/A)
Thermal Properties
- Temperature of deflection under load (1.80 MPa): 104 °C (ISO 75-1,-2)
- Temperature of deflection under load (0.45 MPa): 127 °C (ISO 75-1,-2)
- Vicat softening temperature: 126 °C (50 N, 120 °C/h, ISO 306)
- Coefficient of linear thermal expansion (parallel/normal, 23 to 55 °C): 0.85×10⁻⁴/K (ISO 11359-1,-2)
Electrical Properties (23 °C/50 % r. h.)
- Relative permittivity (100 Hz): 3.0 (IEC 60250)
- Relative permittivity (1 MHz): 2.9 (IEC 60250)
- Dissipation factor (100 Hz): 25×10⁻⁴ (IEC 60250)
- Dissipation factor (1 MHz): 105×10⁻⁴ (IEC 60250)
- Volume resistivity: 1E14 Ohm·m (IEC 62631-3-1)
- Surface resistivity: 1E16 Ohm (IEC 62631-3-2)
- Electrical strength: 35 kV/mm (1 mm, IEC 60243-1)
- Comparative tracking index (CTI): 325 (Solution A) (IEC 60112)
Other Properties (23 °C)
- Water absorption (saturation value): 0.6 % (Water at 23 °C, ISO 62)
- Water absorption (equilibrium value): 0.2 % (23 °C, 50 % r. h., ISO 62)
- Density: 1120 kg/m³ (ISO 1183-1)
Processing and Drying Conditions
- Melt temperature: 260–280 °C (Standard: 270 °C)
- Mold temperature: 70–90 °C
- Dry air drying temperature: 95–110 °C
- Dry air drying time: 4 h
- Maximum moisture content: ≤ 0.02 %
- Barrel temperatures:
- Rear: 230–240 °C
- Middle: 235–245 °C
- Front: 240–270 °C
- Nozzle: 265–275 °C
- Hold pressure: 50–75 % of injection pressure
- Plastic back pressure: 50–150 bar
- Peripheral screw speed: 0.05–0.2 m/s
- Shot-to-cylinder size: 30–70 %
- Vent depth: 0.025–0.075 mm
Features & Benefits
Superior Impact Resistance & Durability
With a high notched impact strength, this PC+ABS blend ensures your medical device housings and components can withstand accidental drops and impacts during use, reducing failure rates and returns.
Excellent Thermal Performance for Sterilization
Its high heat deflection temperature (HDT 1.8 MPa: 104°C) allows components to maintain structural integrity when exposed to repeated sterilization cycles, ensuring device reliability and longevity.
Optimized for Manufacturing Efficiency
The material features excellent flow characteristics, enabling easier filling of complex, thin-walled molds. This results in faster cycle times, higher yields, and reduced manufacturing costs for precision medical parts.
Use & Application
- Medical Devices: Housings and components for diagnostic equipment, monitoring devices, and handheld medical tools.
- Injection Molding: Production of complex, thin-walled parts that require a high-quality surface finish and dimensional stability.