Material Analysis
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PC melt temperature 280-320 window
Problem Phenomenon
【Problem Phenomenon】PC melt temperature too low causes insufficient filling, too high causes degradation and yellowing
Cause Analysis
PC melt temperature 280-320℃: the window is relatively wide but the lower limit has poor flow and the upper limit degrades; above 320℃ thermal degradation yellows and weakens, below 280℃ viscosity is high and filling is difficult
Solution
Conventionally set at 290-310℃; thin-wall long-flow probes 320℃; lower temperature immediately upon yellowing；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PC melt temperature 290-310℃ is the norm, 320℃ is the degradation red line；After confirming effectiveness, solidify 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
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