S-Plastics Valox 4521B resin is a medium flow, 20% glass reinforced flame retardant PBT injection moulding resin. Applications: electrical applications.This grade is a 4521 with reduced flow.
| MECHANICAL | Value | Unit | Standard |
| Taber Abrasion, CS-17, 1 kg | 95 | mg/1000cy | S-Plastics Method |
| Tensile Stress, break, 5 mm/min | 111 | MPa | ISO 527 |
| Tensile Strain, break, 5 mm/min | 2.1 | % | ISO 527 |
| Tensile Modulus, 1 mm/min | 8000 | MPa | ISO 527 |
| Flexural Stress, break, 2 mm/min | 165 | MPa | ISO 178 |
| Flexural Modulus, 2 mm/min | 7400 | MPa | ISO 178 |
| Hardness, Rockwell R | 122 | - | ISO 2039-2 |
| IMPACT | Value | Unit | Standard |
| Izod Impact, unnotched 80*10*4 +23°C | 35 | kJ/m² | ISO 180/1U |
| Izod Impact, unnotched 80*10*4 -30°C | 30 | kJ/m² | ISO 180/1U |
| Izod Impact, notched 80*10*4 +23°C | 6 | kJ/m² | ISO 180/1A |
| Izod Impact, notched 80*10*4 -30°C | 5 | kJ/m² | ISO 180/1A |
| Charpy 23°C, V-notch Edgew 80*10*4 sp=62mm | 7 | kJ/m² | ISO 179/1eA |
| Charpy -30°C, V-notch Edgew 80*10*4 sp=62mm | 6 | kJ/m² | ISO 179/1eA |
| Charpy 23°C, Unnotch Edgew 80*10*4 sp=62mm | 28 | kJ/m² | ISO 179/1eU |
| Charpy -30°C, Unnotch Edgew 80*10*4 sp=62mm | 25 | kJ/m² | ISO 179/1eU |
| THERMAL | Value | Unit | Standard |
| Thermal Conductivity | 0.27 | W/m-°C | ISO 8302 |
| CTE, 23°C to 80°C, flow | 2.5E-05 | 1/°C | ISO 11359-2 |
| CTE, 23°C to 80°C, xflow | 1.2E-04 | 1/°C | ISO 11359-2 |
| Ball Pressure Test, 125°C +/- 2°C | PASSES | - | IEC 60695-10-2 |
| Vicat Softening Temp, Rate B/50 | 205 | °C | ISO 306 |
| Vicat Softening Temp, Rate B/120 | 200 | °C | ISO 306 |
| HDT/Be, 0.45MPa Edgew 120*10*4 sp=100mm | 220 | °C | ISO 75/Be |
| HDT/Ae, 1.8 MPa Edgew 120*10*4 sp=100mm | 205 | °C | ISO 75/Ae |
| PHYSICAL | Value | Unit | Standard |
| Mold Shrinkage on Tensile Bar, flow (2) | 0.3 - 0.7 | % | S-Plastics Method |
| Mold Shrinkage on Tensile Bar, xflow (2) | 0.6 - 0.9 | % | S-Plastics Method |
| Density | 1.59 | g/cm³ | ISO 1183 |
| Water Absorption, (23°C/sat) | 0.28 | % | ISO 62 |
| Moisture Absorption (23°C / 50% RH) | 0.09 | % | ISO 62 |
| Melt Volume Rate, MVR at 250°C/2.16 kg | 14 | cm³/10 min | ISO 1133 |
| ELECTRICAL | Value | Unit | Standard |
| Volume Resistivity | >1.E+15 | Ohm-cm | IEC 60093 |
| Surface Resistivity, ROA | >1.E+15 | Ohm | IEC 60093 |
| Dielectric Strength, in oil, 3.2 mm | 17 | kV/mm | IEC 60243-1 |
| Relative Permittivity, 50/60 Hz | 3.3 | - | IEC 60250 |
| Relative Permittivity, 1 MHz | 3.2 | - | IEC 60250 |
| Dissipation Factor, 50/60 Hz | 0.001 | - | IEC 60250 |
| Dissipation Factor, 1 MHz | 0.02 | - | IEC 60250 |
| Comparative Tracking Index | 275 | V | IEC 60112 |
| FLAME CHARACTERISTICS | Value | Unit | Standard |
| UL Recognized, 94V-0 Flame Class Rating (3) | 0.75 | mm | UL 94 |
| Glow Wire Flammability Index 960°C, passes at | 3.2 | mm | IEC 60695-2-12 |
| Oxygen Index (LOI) | 29 | % | ISO 4589 |
| Source GMD, last updated:02/01/1999 | |||
| Parameter | ||
| Injection Molding | Value | Unit |
| Drying Temperature | 110 - 120 | °C |
| Drying Time | 2 - 4 | hrs |
| Maximum Moisture Content | 0.02 | % |
| Melt Temperature | 250 - 270 | °C |
| Nozzle Temperature | 240 - 260 | °C |
| Front - Zone 3 Temperature | 245 - 265 | °C |
| Middle - Zone 2 Temperature | 240 - 255 | °C |
| Rear - Zone 1 Temperature | 230 - 245 | °C |
| Hopper Temperature | 40 - 60 | °C |
| Mold Temperature | 40 - 100 | °C |
| Source GMD, last updated:02/01/1999 | ||
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For more information please download the datasheet |
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S-Plastics Valox 4521B.pdf |
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