Material Drying
7 visualizaciones
POM drying temperature and time
Fenómeno del problema
After POM was dried at 120°C for 4 hours, the pellets turned yellow and molding produced a pungent odor
Análisis de la causa
POM has limited thermal stability, and long-time drying at 120°C has already triggered thermo-oxidative degradation, releasing formaldehyde and breaking molecular chains; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Control POM drying at 80-100°C×2-3 hours, not exceeding 110°C; use as soon as possible after drying; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
POM drying is a gentle process, and over-temperature drying equals pre-degradation; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!