S-Plastics Valox HR326 resin is Unreinforced PBT resin. Hydrolytically resistant polyester grade.
| MECHANICAL | Value | Unit | Standard |
| Tensile Stress, yld, Type I, 50 mm/min | 55 | MPa | ASTM D 638 |
| Tensile Strain, brk, Type I, 50 mm/min | 50 | % | ASTM D 638 |
| Flexural Stress, brk, 1.3 mm/min, 50 mm span | 86 | MPa | ASTM D 790 |
| Flexural Modulus, 1.3 mm/min, 50 mm span | 2410 | MPa | ASTM D 790 |
| IMPACT | Value | Unit | Standard |
| Izod Impact, unnotched, 23°C | 1602 | J/m | ASTM D 4812 |
| Izod Impact, notched, 23°C | 53 | J/m | ASTM D 256 |
| THERMAL | Value | Unit | Standard |
| HDT, 1.82 MPa, 3.2mm, unannealed | 52 | °C | ASTM D 648 |
| HDT, 0.45 MPa, 6.4 mm, unannealed | 148 | °C | ASTM D 648 |
| CTE, -40°C to 40°C, flow | 8.64E-05 | 1/°C | ASTM E 831 |
| CTE, -40°C to 95°C, flow | 1.19E-04 | 1/°C | ASTM E 831 |
| PHYSICAL | Value | Unit | Standard |
| Specific Gravity | 1.31 | - | ASTM D 792 |
| Specific Volume | 0.1 | cm³/g | ASTM D 792 |
| Water Absorption, 24 hours | 0.06 | % | ASTM D 570 |
| Mold Shrinkage, flow, 3.2 mm | 2.1 - 2.3 | % | S-Plastics Method |
| Mold Shrinkage on Tensile Bar, xflow (2) | 2.2 - 2.4 | % | S-Plastics Method |
| ELECTRICAL | Value | Unit | Standard |
| Volume Resistivity | 2.5E+16 | Ohm-cm | ASTM D 257 |
| Dielectric Strength, in air, 3.2 mm | 16.9 | kV/mm | ASTM D 149 |
| Relative Permittivity, 50/60 Hz | 2.9 | - | ASTM D 150 |
| Relative Permittivity, 1 MHz | 2.88 | - | ASTM D 150 |
| Dissipation Factor, 50/60 Hz | 0.001 | - | ASTM D 150 |
| Dissipation Factor, 1 MHz | 0.016 | - | ASTM D 150 |
| Source GMD, last updated:01/05/2000 | |||
| Parameter | ||
| Injection Molding | Value | Unit |
| Drying Temperature | 60 - 75 | °C |
| Drying Time | 4 - 5 | hrs |
| Drying Time (Cumulative) | 8 | hrs |
| Maximum Moisture Content | 0.05 | % |
| Melt Temperature | 250 - 265 | °C |
| Nozzle Temperature | 245 - 260 | °C |
| Front - Zone 3 Temperature | 250 - 265 | °C |
| Middle - Zone 2 Temperature | 245 - 260 | °C |
| Rear - Zone 1 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 |
| Source GMD, last updated:01/05/2000 | ||
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For more information please download the datasheet |
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S-Plastics Valox HR326.pdf |
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