Material Drying
2 views
PVC Drying Temperature Upper Limit
Problem Phenomenon
PVC dried above 100℃ for long time, pellets yellow and degradation advances during processing
Cause Analysis
PVC thermal stability poor, too high drying temperature prematurely consumes heat stabilizer, processing window narrows; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solution
PVC drying temperature 75-90℃ not exceeding 95℃; time 1-2 hours sufficient; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PVC drying is a low-temperature short-time route, over-temperature consumes stabilizer; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
Was this helpful?
0 people found this helpful
Thank you for your feedback!