Processing Machinery
1 views
PCL Low Melting Point and Narrow Processing Window
Problem Phenomenon
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.
Cause Analysis
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.
Solution
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
Key Takeaway
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
Was this helpful?
0 people found this helpful
Thank you for your feedback!