Injection Molding Process Data: PVC (Rigid) to PPS (Polyphenylene Sulfide)
Injection molding process parameters for thermoplastics — melt temperature, mold temperature, injection pressure, drying conditions, shrinkage, and wall thickness guidelines
| material | draft angle deg (deg) | drying required | drying temp C (degC) | drying time hr (hr) | injection pressure typical MPa (MPa) | material family | max wall thickness mm (mm) | melt temp max C (degC) | melt temp min C (degC) | min wall thickness mm (mm) | mold shrinkage pct max (%) | mold shrinkage pct min (%) | mold temp max C (degC) | mold temp min C (degC) | notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TPU (Thermoplastic Polyurethane) | 2 | Yes | 100 | 4 | 70 | thermoplastic_elastomer | 8 | 220 | 180 | 0.5 | 1.5 | 0.3 | 60 | 20 | Very hygroscopic; tacky when hot; mold release often needed; excellent abrasion resistance |
| PPO/PPE (Noryl blend) | 1.5 | Yes | 100 | 2 | 100 | amorphous_engineering | 6 | 300 | 260 | 0.8 | 0.8 | 0.5 | 110 | 80 | Low moisture absorption for amorphous; good dimensional stability; used in hot water and steam applications |
| PPS (Polyphenylene Sulfide) | 1 | Yes | 150 | 4 | 120 | semicrystalline_engineering | 5 | 330 | 300 | 0.8 | 0.7 | 0.3 | 160 | 120 | High chemical resistance; prone to flash; flame retardant; used in electrical/automotive under-hood |
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