Drying Conditions
Temperature
80°C
Time
2h
Target Moisture
N/A
Melt Temperature
190~210°C
⚠ Thermal degradation risk above 230°C
Minimize residence time and avoid exceeding this temperature.
Mold Temperature
80~100°C
Shrinkage
1.8~2.2%
Common Defects & First Checks
Sink Mark
POM(acetal): high shrinkage.
Field Notes
POM(acetal): high shrinkage. Releases formaldehyde gas above 230°C → needs excellent venting, no dead spots in hot runners. Narrow processing window. Beyond 9-type: formaldehyde deposits, center-gated voids. Copolymer baseline (Korean market default). Homopolymer melt 205-225°C, hard limit 230°C; copolymer hard limit 238°C. Copolymer: avoid residence >15min above 193°C (formaldehyde).
Related Resins
This data is a field-reference summary. Always verify against the resin manufacturer’s official TDS.