BASF Ultramid® B3UG4
Plastic Granules
ULTRAMID B3UG4 Granules PA6-GF20 FR(30)
ULTRAMID B3UG4 is a Halogen- and phosphorus-free flame-retardant, 20% glass fiber reinforced PA6 injection molding grade plastic resin. Engineered for outstanding flowability, low smoke density, and superior electrical performance. For sensitive electronic housings and E&E components.
Typical property data
Physical Properties
- Density: 1310 kg/m³ (ISO 1183)
- Viscosity Number (0.5% in 96% H₂SO₄): 150 cm³/g (ISO 307 / 1157 / 1628)
- Water Absorption, Saturation in Water at 23 °C: 6.6 – 7.2 % (similar to ISO 62)
- Moisture Absorption, Equilibrium 23 °C / 50 % r.h.: 2.0 – 2.4 % (similar to ISO 62)
- Bulk Density (Granules): approx. 0.7 g/cm³
- Glass Fiber Content: 20 %
Mechanical Properties
- Tensile Modulus: 6000 / 3000 MPa (ISO 527-1/-2)
- Stress at Break: 90 / 50 MPa (ISO 527-1/-2)
- Strain at Break: 3 / 20 % (ISO 527-1/-2)
- Flexural Modulus: 5700 / 2800 MPa (ISO 178)
- Flexural Strength: 150 / 70 MPa (ISO 178)
- Charpy Unnotched Impact Strength, 23 °C: 40 / 110 kJ/m² (ISO 179/1eU)
- Charpy Unnotched Impact Strength, –30 °C: 35 / – kJ/m² (ISO 179/1eU)
- Charpy Notched Impact Strength, 23 °C: 3 / 9 kJ/m² (ISO 179/1eA)
- Charpy Notched Impact Strength, –30 °C: 3.4 / – kJ/m² (ISO 179/1eA)
Thermal Properties
- Melting Temperature (DSC): 220 °C (ISO 11357-1/-3)
- Heat Deflection Temperature, HDT/A (1.8 MPa): 170 °C (ISO 75-1/-2)
- Heat Deflection Temperature, HDT/B (0.45 MPa): 210 °C (ISO 75-1/-2)
- RTI Electrical: 140 °C (UL 746B)
- RTI Mechanical with Impact: 125 °C (UL 746B)
- RTI Mechanical without Impact (Strength): 140 °C (UL 746B)
- Long-Term Service Temperature (20,000 h, 50% tensile strength retention): 160 °C (IEC 60216)
- Long-Term Service Temperature (5,000 h, 50% tensile strength retention): 185 °C (IEC 60216)
- Coefficient of Linear Thermal Expansion, 23–55 °C (parallel): 41 E-6/K (ISO 11359-1/-2)
- Coefficient of Linear Thermal Expansion, 23–55 °C (normal): 86 E-6/K (ISO 11359-1/-2)
Electrical Properties
- Relative Permittivity (1 MHz): 3.8 / – (IEC 62631-2-1)
- Dissipation Factor (1 MHz): 150 E-4 / – (IEC 62631-2-1)
- Volume Resistivity: 1E13 / 1E9 Ohm·m (IEC 62631-3-1)
- Surface Resistivity: – / 1E12 Ohm (IEC 62631-3-2)
- Comparative Tracking Index (CTI), Solution A: 550 V (IEC 60112)
- Electric Strength, K20/K20 (60×60×1 mm³): 35 / 34 kV/mm (IEC 60243-1)
- UL Dielectric Strength: 17 kV/mm (UL 746A)
- High-Voltage Arc Tracking Rate (HVTR): 0 (UL 746A)
- High Voltage, Low Current Arc Resistance (D495): 6 (ASTM D495)
Flame Characteristics
- UL 94 Flammability Rating (0.71 mm): V-2 (UL 94 / IEC 60695-11-10)
- UL 94 Flammability Rating (1.5 mm): V-2 (UL 94 / IEC 60695-11-10)
- UL 94 Flammability Rating (3.0 mm): V-2 (UL 94 / IEC 60695-11-10)
- Glow Wire Flammability Index (GWFI): 960 °C at 1 mm (IEC 60695-2-12)
- Hot Wire Ignition (HWI): PLC 3 at 0.71 mm / PLC 2 at 1.5 mm / PLC 1 at 3.0 mm (UL 746A)
- High-Amp Arc Ignition (HAI): PLC 0 across all thicknesses (UL 746A)
- Railway Fire Protection – Hazard Level: HL2 (1 – 3 mm) (EN 45545-2, R22 & R23)
- Halogen Content: Halogen-free
- Phosphorus Content: Phosphorus-free
- Smoke Density: Low
Processing Parameters
- Melt Volume-Flow Rate (MVR), 275 °C / 5 kg: 80 cm³/10 min (ISO 1133)
- Recommended Melt Temperature (Injection Molding / Extrusion): 250 – 275 °C
- Recommended Mold Temperature (Injection Molding): 80 – 90 °C
- Molding Shrinkage, Model Housing 1.5 mm: 0.5 %
- Molding Shrinkage (Parallel): 0.80 % (ISO 294-4)
- Molding Shrinkage (Normal): 0.80 % (ISO 294-4)
Use & Applications
- Sensitive electronic components