Material Analysis
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POM melt temperature exceeding standard decomposition (formaldehyde release)
Fenómeno del problema
A pungent formaldehyde odor appears in the workshop, and the product surface shows splashing, silver streaks, and bubbles.
Análisis de la causa
When POM melt temperature exceeds 230℃, thermal decomposition occurs, releasing formaldehyde gas; the higher the temperature, the faster the decomposition, and the gas leaves splash marks on the product surface and irritates the respiratory tract.
Solución
①Immediately reduce the melt temperature below 210℃; ②shorten the residence time; ③clean the barrel when decomposition is severe; ④strengthen workshop ventilation; ⑤write the temperature upper limit into the SOP as a safety rule.
Conclusión clave
POM melt temperature is a safety red line, not a quality preference.
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