Material Analysis
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POM melt temperature 190-210°C
Problem Phenomenon
If the melt temperature is too low, plasticization is poor; if too high, the product discolors and emits a pungent formaldehyde odor
Cause Analysis
POM has a narrow melting range and poor thermal stability, with a melt temperature window of 190-210°C; above 220°C degradation starts, the decomposition product is irritating formaldehyde gas, and in severe cases the product bubbles and discolors or even causes danger
Solution
①Set the melt temperature at 190-210°C, strictly prohibiting exceeding 220°C; ②use measured melt temperature to calibrate the barrel setting; ③if formaldehyde odor appears, immediately lower the temperature and purge the barrel material
Key Takeaway
POM's temperature discipline is extremely strict; every step outside the 190-210°C window approaches degradation, and odor is the most direct alarm; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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