Material Drying
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TPU Lab-Scale Drying
Problem Phenomenon
The drying effect of laboratory TPU samples is unstable
Cause Analysis
Small-batch spreading and equipment differences; when troubleshooting on site, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
Lab-scale drying in a vacuum oven at 90°C × 3 hours; spread in a thin layer; record the conditions; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
Standardize lab-scale drying; 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 similar problems in the future
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