Sabic VALOX™ FR PBT 771
Valox FR PBT 771 Flame Retardant Grade
VALOX™ FR resin 771 is a 35% mineral/glass-filled, flame-retardant PBT grade. It offers superior chemical resistance, a UL94 V-0 rating at 0.75mm, and exceptional protection against electrical arcing, making it ideal for demanding electrical components.
Typical property data
Physical Properties
- Specific Gravity: 1.7 (ASTM D792)
- Mold Shrinkage (flow): 0.65–0.85% (SABIC method)
- Mold Shrinkage (cross-flow): 1–1.2% (SABIC method)
Mechanical Properties
- Tensile Stress (at break): 72 MPa (ASTM D638)
- Tensile Strain (at break): 2.3% (ASTM D638)
- Flexural Stress (at break): 110 MPa (ASTM D790)
- Flexural Modulus: 5860 MPa (ASTM D790)
Impact Properties
- Izod Impact (unnotched, 23°C): 390 J/m (ASTM D4812)
- Izod Impact (notched, 23°C): 42 J/m (ASTM D256)
Thermal Properties
- HDT (0.45 MPa, unannealed): 217°C (ASTM D648)
- HDT (1.82 MPa, unannealed): 196°C (ASTM D648)
- Relative Temperature Index (Electrical): 140°C (UL 746B)
- Relative Temperature Index (Mechanical with Impact): 125°C (UL 746B)
- Relative Temperature Index (Mechanical without Impact): 140°C (UL 746B)
- Ball Pressure Test: Passes at 125°C and 175°C (IEC 60695-10-2)
Electrical Properties
- Arc Resistance: PLC 4 (ASTM D495)
- Comparative Tracking Index: 600 V (IEC 60112)
- Volume Resistivity: >1.E+15 Ω·cm (ASTM D257, IEC 60093)
- High Voltage Arc Tracking Rate: PLC 0 (UL 746A)
- Hot Wire Ignition: PLC 0 (UL 746A)
- High Ampere Arc Ignition: PLC 0 (UL 746A)
Flame Characteristics
- UL Recognized, 94V-0 Flame Class: 0.75 mm (UL 94)
- UL Recognized, 94-5VA Flame Class: 2.0 mm (UL 94)
- Glow Wire Flammability Index: Passes at 960°C (1 mm, IEC 60695-2-12)
- Glow Wire Ignitability Temperature: 750°C (1 mm, IEC 60695-2-13)
- Glow Wire Ignitability Temperature: 800°C (3 mm, IEC 60695-2-13)
Injection Molding
- Drying Temperature: 110–120°C
- Drying Time: 3–4 hours (max cumulative: 12 hours)
- Maximum Moisture Content: 0.02%
- Melt Temperature: 255–275°C
- Nozzle Temperature: 255–270°C
- Mold Temperature: 40–100°C
- Screw Speed: 50–80 rpm
- Back Pressure: 0.3–0.7 MPa
- Vent Depth: 0.025–0.038 mm
Features & Benefits
Superior Flame Retardant Performance
VALOX 771 achieves a UL94 V-0 rating at just 0.75mm, ensuring critical safety in thin-walled components. This allows for design flexibility without compromising on fire safety in enclosures and connectors.
Exceptional Electrical Safety
With a CTI of 0 and high arc resistance, VALOX™ FR resin 771 withstands electrical arcing. This prevents tracking and failure in high-voltage environments, enhancing the reliability and lifespan of electrical parts.
Reliable Mechanical & Thermal Strength
This grade maintains high mechanical strength and heat resistance (HDT up to 217°C). It ensures dimensional stability and performance under load and in high-temperature operating conditions.
Use & Application
- Circuit Breakers and Switches
- Electrical Connectors
- Motor Housings and Commutators
- Power Distribution Components
- Automotive Electrical Systems
- Appliance Controllers and Relays