Covestro Bayblend® W90 XG PC/ASA
Plastic Granules
Bayblend® W90 XG PC/ASA Resin General Purpose Grade
Bayblend W90 XG is a premium PC+ASA blend engineered by Covestro for demanding applications. Offering exceptional UV stability, heat resistance (Vicat/B 120: 115°C), and superior surface finish, it excels in harsh environments while maintaining dimensional stability. Ideal for injection-molded parts requiring durability and aesthetics.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate: 26 cm³/10 min (260 °C / 5 kg, ISO 1133)
- Melt viscosity: 225 Pa·s (1000 s⁻¹ / 260 °C, ISO 11443-A)
- Molding shrinkage (parallel): 0.55–0.75% (260 °C / MT 80 °C, ISO 294-4)
- Molding shrinkage (normal): 0.55–0.75% (260 °C / MT 80 °C, ISO 294-4)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus: 2400 MPa (1 mm/min, ISO 527-1,-2)
- Yield stress: 61 MPa (50 mm/min, ISO 527-1,-2)
- Yield strain: 5.1% (50 mm/min, ISO 527-1,-2)
- Stress at break: 56 MPa (50 mm/min, ISO 527-1,-2)
- Strain at break: > 50% (50 mm/min, ISO 527-1,-2)
- Izod notched impact strength (23 °C): 52 kJ/m² (ISO 180/A)
- Izod notched impact strength (-30 °C): 18 kJ/m² (ISO 180/A)
- Puncture energy (23 °C): 51 J (ISO 6603-2)
- Puncture energy (-30 °C): 57 J (ISO 6603-2)
Thermal Properties
- Temperature of deflection under load (1.80 MPa): 112 °C (ISO 75-1,-2)
- Temperature of deflection under load (0.45 MPa): 130 °C (ISO 75-1,-2)
- Vicat softening temperature (50 N; 50 °C/h): 134 °C (ISO 306)
- Vicat softening temperature (50 N; 120 °C/h): 135 °C (ISO 306)
- Coefficient of linear thermal expansion (parallel, 23–55 °C): 0.70 × 10⁻⁴/K (ISO 11359-1,-2)
- Coefficient of linear thermal expansion (normal, 23–55 °C): 0.70 × 10⁻⁴/K (ISO 11359-1,-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): 25 × 10⁻⁴ (IEC 60250)
- Dissipation factor (1 MHz): 100 × 10⁻⁴ (IEC 60250)
- Volume resistivity: 1 × 10¹⁴ Ohm·m (IEC 62631-3-1)
- Surface resistivity: 1 × 10¹⁶ Ohm (IEC 62631-3-2)
- Electrical strength: 35 kV/mm (1 mm, IEC 60243-1)
Other Properties (23 °C)
- Water absorption (saturation): 0.5% (Water at 23 °C, ISO 62)
- Water absorption (equilibrium): 0.2% (23 °C; 50 % r. h., ISO 62)
- Density: 1150 kg/m³ (ISO 1183-1)
Processing and Drying Conditions
- Injection molding melt temperature: 260 °C (ISO 294)
- Injection molding mold temperature: 80 °C (ISO 294)
- Injection velocity: 240 mm/s (ISO 294)
- Recommended melt temperature range: 260–280 °C
- Standard melt temperature: 270 °C
- Mold temperature range: 70–90 °C
- Hold pressure (as % of injection pressure): 50–75%
- Plastic back pressure: 50–150 bar
- Peripheral screw speed: 0.05–0.2 m/s
- Shot-to-cylinder size: 30–70%
- Dry air drying temperature: 95–110 °C
- Dry air drying time: 4 h
- Maximum moisture content: ≤ 0.02%
Features & Benefits
All-Weather Durability
UV-stabilized ASA shields against sun damage, preventing fading/cracking in outdoor use. Perfect for automotive trims, garden equipment, and signage exposed to sunlight.
High Heat Resistance
It withstands 115°C Vicat softening temperatures and 112°C deflection under load (0.45 MPa). Ensures stability in engine bays, electronics housings, and hot climates.
Precision Molding Performance
Low shrinkage (0.5–0.7%) and smooth flow (34 cm³/10 min) enable complex, high-gloss parts. Reduces warping and post-processing for consumer electronics or automotive interiors.
Use & Applications
- Automotive: Mirror housings, grilles, interior trims (UV/heat resistant).
- Consumer Electronics: Smart device casings, camera bodies (high-gloss finish).
- Outdoor Equipment: Garden tool housings, HVAC vents (weatherproof).
- Industrial Enclosures: Control panels, sensor covers (impact resistant).