S-Plastics Valox 321 resin is General purpose, unreinforced PBT resin with improved wear properties.
| MECHANICAL | Value | Unit | Standard |
| Tensile Stress, yld, Type I, 50 mm/min | 51 | MPa | ASTM D 638 |
| Tensile Strain, brk, Type I, 50 mm/min | 200 | % | ASTM D 638 |
| Flexural Stress, yld, 1.3 mm/min, 50 mm span | 82 | MPa | ASTM D 790 |
| Flexural Modulus, 1.3 mm/min, 50 mm span | 2340 | 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 |
| Modified Gardner, 23°C | 40 | J | ASTM D 3029 |
| THERMAL | Value | Unit | Standard |
| HDT, 0.45 MPa, 6.4 mm, unannealed | 154 | °C | ASTM D 648 |
| HDT, 1.82 MPa, 6.4 mm, unannealed | 54 | °C | ASTM D 648 |
| PHYSICAL | Value | Unit | Standard |
| Specific Gravity | 1.31 | - | ASTM D 792 |
| Mold Shrinkage, flow, 0.75-2.3 mm | 0.9 - 1.6 | % | S-Plastics Method |
| Mold Shrinkage, flow, 2.3-4.6 mm | 1.5 - 2.3 | % | S-Plastics Method |
| Mold Shrinkage, xflow, 0.75-2.3 mm | 1 - 1.7 | % | S-Plastics Method |
| Mold Shrinkage, xflow, 2.3-4.6 mm | 1.6 - 2.4 | % | S-Plastics Method |
| Source GMD, last updated:01/05/2000 | |||
| Parameter | ||
| Injection Molding | Value | Unit |
| Drying Temperature | 120 | °C |
| Drying Time | 3 - 4 | hrs |
| Drying Time (Cumulative) | 12 | hrs |
| Maximum Moisture Content | 0.02 | % |
| Melt Temperature | 245 - 260 | °C |
| Nozzle Temperature | 240 - 255 | °C |
| Front - Zone 3 Temperature | 245 - 260 | °C |
| Middle - Zone 2 Temperature | 240 - 255 | °C |
| Rear - Zone 1 Temperature | 230 - 250 | °C |
| Mold Temperature | 50 - 75 | °C |
| Back Pressure | 0.3 - 0.7 | MPa |
| Screw Speed | 50 - 100 | rpm |
| Shot to Cylinder Size | 40 - 80 | % |
| Vent Depth | 0.013 - 0.025 | mm |
| Source GMD, last updated:01/05/2000 | ||
For more information please download the datasheet | |
 | S-Plastics Valox 321.pdf |
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