Material Drying
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ASA moisture content target management
Problem Phenomenon
[Problem phenomenon] ASA drying released based on time, moisture content fluctuates greatly, product appearance varies between good and bad
Cause Analysis
Moisture content target is about below 0.05%, which cannot be guaranteed by drying time alone: environmental humidity, material layer thickness, dryer performance differences all affect the endpoint; moisture meter measurement is the release basis
Solution
Equip a moisture analyzer for batch sampling; release when moisture content ≤0.05%; drying parameters fine-tuned with seasonal humidity and recorded; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA drying looks at moisture content not the clock, only release below 0.05%; 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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