Material Drying
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PLA Drying Temperature 80-90℃
Fenómeno del problema
After the drying temperature is too high, PLA pellets stick and agglomerate, blocking the drying tower discharge port
Análisis de la causa
PLA glass transition temperature is about 60℃; amorphous pellets soften and stick at the drying temperature; the drying temperature of amorphous PLA must not exceed 45-50℃, and 80-90℃ can only be used after pre-crystallization
Solución
①Amorphous PLA drying temperature ≤45℃; ②After pre-crystallization, 80-90℃×4 hours; ③Crystallization equipment equipped with anti-sticking; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PLA drying temperature depends on the crystallization state; low-temperature pre-crystallization before crystallization is the iron rule to prevent sticking and tower blockage; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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