Processing Machinery
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PCL Low Melting Point and Narrow Processing Window
Fenómeno del problema
PCL degrades when the processing temperature is slightly high and plasticizes poorly when slightly low; the process window is extremely narrow and quality fluctuates greatly.
Análisis de la causa
The melting point of PCL is only 60~63°C, but the melt viscosity is high and processing above 140°C is required; thermal degradation occurs when the temperature exceeds a certain limit; plasticization is insufficient at low temperature; the narrow window requires high temperature control accuracy of the equipment.
Solución
①Precisely control the processing temperature at 140~180°C; ②verify equipment temperature control accuracy; ③avoid long-term high-temperature residence; ④temperature uniformity management.; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
PCL's 60°C melting point and 140°C processing temperature are a special combination; the narrow window requires precise temperature control; uniformity ensures quality stability.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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