Technical support · Processing guide
Polycarbonate
processing guide
The processing guide should be used as a reference only. Some adjustment may be needed depending on product design and ambient conditions.
Step 01
Pre-drying
Absorbed moisture can degrade properties during moulding.
<0.02%Target moisture content before moulding
- Moisture absorbed at room temperature≈ 0.2 %
- Target moisture before moulding< 0.02 %
- Tray dryer with hot air> 4 h at 120 °C
- Pellet layer in trays≤ 3 cm
- Hopper dryer inlet air100–120 °C (avoids re-absorption)
Step 02
Injection moulding
| Grades | Nozzle (°C) | Front (°C) | Middle (°C) | Rear (°C) | Mould (°C) | Injection pressure (kgf/cm²) | Injection speed | Back pressure (kgf/cm²) | Screw speed (rpm) |
|---|---|---|---|---|---|---|---|---|---|
| K-20/30/40 · K-(20/30/40)MRA · K-(20/30/40)UV · K-(20/30/40)UVR · K-30FR · KFN-30 | 250–290 | 270–300 | 270–300 | 270–300 | 75–100 | 500–1800 | Mid–High | 50–100 | 40–80 |
| KG-(10/15/20/30)MRA · KGN-(10/15/20/30)MRA · KG-30F15 · K-30CF10 | 280–300 | 290–310 | 280–300 | 270–300 | 80–120 | 500–1500 | Mid–High | ≤ 100 | 40–80 |
| RS-1340 | 310 | 310 | 300 | 290–300 | 130–150 | 300–1000 | Mid–High | 270–300 * | 0–10 * |
Reference only — adjust for part design and ambient conditions.
Grades in this guide
K-20/30/40 · MRA · UV · UVR · K-30FR · KFN-30PolycarbonateKG / KGN-(10/15/20/30)MRA · KG-30F15 · K-30CF10Reinforced polycarbonateRS-1340Recycled PPS
Next step
Moulding problem?
Splay, brittleness, sink marks or colour issues often start with drying or temperature. Tell us what you see.