Sabic VALOX™ FR PBT 357X
Plastic Granules
Valox FR PBT 357X Flame Retardant Grade
VALOX™ FR PBT resin 357X is an impact-modified, flame-retardant PBT/PC blend. It offers exceptional chemical resistance and top-tier flammability ratings (UL94 V-0 at 0.75mm & 5VA at 2.5mm), making it ideal for demanding electrical components.
Associated Documents
TDS Europe
Typical property data
Physical Properties
- Density: 1.34 g/cm³ (ISO 1183)
- Water Absorption (23°C, Saturated): 0.5% (ISO 62-1)
- Moisture Absorption (23°C / 50% RH): 0.15% (ISO 62)
- Melt Flow Rate:
- 10 g/10 min at 250°C/5.0 kgf (ASTM D1238)
- 13 g/10 min at 265°C/5.0 kgf (ASTM D1238)
- Mold Shrinkage:
- Flow: 1.0–1.4% (SABIC Method)
- Across Flow: 0.9–1.8% (SABIC Method)
Mechanical Properties
- Tensile Stress (Yield): 50 MPa (ISO 527)
- Tensile Modulus: 2200 MPa (ISO 527)
- Flexural Stress (Yield): 80 MPa (ISO 178)
- Flexural Modulus: 2000 MPa (ISO 178)
- Hardness (Rockwell R): 115 (ISO 2039-2)
Impact Properties
- Izod Impact Strength (Notched):
- 40 kJ/m² at 23°C (ISO 180/1A)
- 10 kJ/m² at -30°C (ISO 180/1A)
- Charpy Impact Strength (Notched):
- 40 kJ/m² at 23°C (ISO 179/1eA)
- 10 kJ/m² at -30°C (ISO 179/1eA)
Thermal Properties
- Vicat Softening Temperature:
- 180°C (Rate A/50) (ISO 306)
- 145°C (Rate B/50) (ISO 306)
- Heat Deflection Temperature (HDT):
- 130°C at 0.45 MPa (ISO 75/Bf)
- 85°C at 1.8 MPa (ISO 75/Af)
- Thermal Conductivity: 0.17 W/m°C (ISO 8302)
Electrical Properties
- Dielectric Strength:
- 25 kV/mm at 1.6 mm (IEC 60243-1)
- 17 kV/mm at 3.2 mm (IEC 60243-1)
- Volume Resistivity: >1.E+15 Ω·cm (IEC 60093)
- Comparative Tracking Index (CTI): 200 V (IEC 60112)
Flame Characteristics
- UL 94 Flame Class Rating:
- 94V-0 at 0.75 mm
- 94-5VA at 2.5 mm
- Oxygen Index (LOI): 30% (ISO 4589)
- Glow Wire Ignitability Temperature:
- 825°C at 1 mm (IEC 60695-2-13)
Injection Molding
- Drying Temperature: 110–120°C
- Melt Temperature: 250–270°C
- Mold Temperature: 40–100°C
- Maximum Moisture Content: 0.02%
Features & Benefits
Superior Flame Retardancy & Safety
This material achieves UL94 V-0 at just 0.75mm, allowing for the design of thinner, lighter, and more compact components without compromising safety.
Excellent Impact Strength & Durability
With its high notched impact strength, VALOX 357X remains tough and resistant to cracking, even at low temperatures down to -30°C.
Reliable Thermal & Electrical Performance
It maintains structural integrity with a Heat Deflection Temperature (HDT) of 130°C and offers excellent electrical insulation properties.
Use & Application
- Bobbins and Coil Formers
- Circuit Breakers & Switches
- Electrical Connectors & Housings
- Power Distribution Enclosures
- Sensor Housings