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Process parameters.
| Process Parameter | LDPE | HDPE |
|---|---|---|
| Injection rate (mm/s) | 50 | 60 |
| Injection pressure (MPa) | 60 | 80 |
| Cooling time (s) | 30 | 35 |
| Mould temperature (°C) | 40 | 40 |
| Holding time (s) | 30 | 25 |
| Barrel temperature—Zone 1 (°C) | 140 | 150 |
| Barrel temperature—Zone 2 (°C) | 150 | 160 |
| Barrel temperature—Zone 3 (°C) | 160 | 180 |
| Barrel temperature—Zone 4 (°C) | 180 | 190 |
