Sabic VALOX™ FR PBT 553U
Valox FR PBT 553U Flame Retardant Grade
VALOX™ FR resin 553U is a 30% glass-filled, flame-retardant PBT/PC blend. It offers superior strength, minimal warpage, and a UL94 V-0 rating at 0.86mm, ideal for demanding electrical and structural components.
Associated Documents
TDS Americas
Typical property data
Physical Properties
- Specific Gravity: 1.58 (ASTM D792)
- Specific Volume: 0.63 cm³/g (ASTM D792)
- Water Absorption (23°C/24hrs): 0.07% (ASTM D570)
- Mold Shrinkage (Flow, 1.5–3.2 mm): 0.3–0.5% (SABIC method)
- Mold Shrinkage (Flow, 3.2–4.6 mm): 0.5–0.8% (SABIC method)
- Mold Shrinkage (Cross-flow, 1.5–3.2 mm): 0.4–0.6% (SABIC method)
- Mold Shrinkage (Cross-flow, 3.2–4.6 mm): 0.6–0.9% (SABIC method)
Mechanical Properties
- Tensile Stress (Break, Type I, 5 mm/min): 110 MPa (ASTM D638)
- Flexural Stress (Break, 1.3 mm/min, 50 mm span): 179 MPa (ASTM D790)
- Flexural Modulus (1.3 mm/min, 50 mm span): 9400 MPa (ASTM D790)
- Hardness (Rockwell R): 118 (ASTM D785)
Impact Properties
- Izod Impact (Unnotched, 23°C): 640 J/m (ASTM D4812)
- Izod Impact (Notched, 23°C): 85 J/m (ASTM D256)
Thermal Properties
- Heat Deflection Temperature (HDT, 0.45 MPa, 6.4 mm, unannealed): 204°C (ASTM D648)
- Heat Deflection Temperature (HDT, 1.82 MPa, 6.4 mm, unannealed): 160°C (ASTM D648)
- Coefficient of Thermal Expansion (CTE, -40°C to 40°C, Flow): 2.16×10−52.16 \times 10^{-5} 1/°C (ASTM E831)
- Coefficient of Thermal Expansion (CTE, 60°C to 138°C, Flow): 2.16×10−52.16 \times 10^{-5} 1/°C (ASTM E831)
- Relative Temperature Index (Electrical): 125°C (UL 746B)
- Relative Temperature Index (Mechanical with Impact): 110°C (UL 746B)
- Relative Temperature Index (Mechanical without Impact): 125°C (UL 746B)
Electrical Properties
- Volume Resistivity: 4.3×10164.3 \times 10^{16} Ω·cm (ASTM D257)
- Dielectric Strength (In air, 3.2 mm): 18.8 kV/mm (ASTM D149)
- Dielectric Strength (In oil, 1.6 mm): 25.5 kV/mm (ASTM D149)
- Relative Permittivity (100 Hz): 3.8 (ASTM D150)
- Relative Permittivity (1 MHz): 3.7 (ASTM D150)
- Dissipation Factor (100 Hz): 0.002 (ASTM D150)
- Dissipation Factor (1 MHz): 0.02 (ASTM D150)
- Arc Resistance (Tungsten): PLC Code 6 (ASTM D495)
- Hot Wire Ignition: PLC Code 1 (UL 746A)
- High Voltage Arc Track Rate: PLC Code 3 (UL 746A)
- High Ampere Arc Ignition (Surface): PLC Code 3 (UL 746A)
- Comparative Tracking Index (UL): PLC Code 3 (UL 746A)
Flame Characteristics
- UL Recognized Flame Class (94V-0): 0.86 mm (UL 94)
- UL Recognized Flame Class (94-5VA): 2.31 mm (UL 94)
- Oxygen Index (LOI): 37.1% (ASTM D2863)
- UV-light and Water Exposure/Immersion: F1 (UL 746C)
Injection Molding
- Drying Temperature: 120°C
- Drying Time: 3–4 hours
- Drying Time (Cumulative): 12 hours
- Maximum Moisture Content: 0.02%
- Melt Temperature: 250–265°C
- Nozzle Temperature: 245–260°C
- Front Zone Temperature: 250–265°C
- Middle Zone Temperature: 245–260°C
- Rear Zone Temperature: 240–255°C
- Mold Temperature: 65–90°C
- Back Pressure: 0.3–0.7 MPa
- Screw Speed: 50–80 RPM
- Shot to Cylinder Size: 40–80%
- Vent Depth: 0.025–0.038 mm
Features & Benefits
Superior Flame Retardancy & Safety
It can meet stringent UL94 V-0 and 5VA ratings, ensuring critical fire safety for electrical enclosures and components, even in thin-walled designs.
Exceptional Dimensional Stability
Its 30% glass-filled composition significantly reduces shrinkage and warpage, guaranteeing precise part geometry and long-term reliability in harsh environments.
Robust Mechanical & Electrical Properties
It can provide high strength, rigidity, and excellent dielectric strength, perfect for components that must withstand both electrical stress and physical load.
Use & Application
- Appliance Handles
- Spotlights & Lighting Housings
- Electric Motor Components
- Pump Housings