Processing Machinery
1 views
PET melt actual measurement
Problem Phenomenon
PET preforms produced at the set temperature have large fluctuations in acetaldehyde content
Cause Analysis
There is a deviation between the set temperature and the actual melt temperature, and the acetaldehyde generation is extremely sensitive to the actual temperature; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Regularly actually measure the air-shot melt temperature; correct the setting with the measured value; establish a correlation curve between acetaldehyde content and melt temperature; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Acetaldehyde control must be based on the actually measured melt temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
Was this helpful?
0 people found this helpful
Thank you for your feedback!