Material Drying
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PET small-batch drying
Problem Phenomenon
Laboratory small-batch PET samples are dried in an oven, and the result repeatability is poor
Cause Analysis
Ordinary ovens are affected by ambient humidity, the drying state of small-batch samples is inconsistent, and the test data are scattered; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
For small-scale tests, use a vacuum oven at 140℃ × 4 hours; fix the sample amount and spreading thickness; record each drying condition; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Small-scale test drying conditions must be standardized to ensure data comparability; 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
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