Material Drying
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POM recycled '2079851475616104451
Problem Phenomenon
POM products blended with recycled material have increased bubbles
Cause Analysis
Recycled material is exposed to moisture absorption and has accumulated thermal history, so both moisture content and degradation degree are higher than virgin material; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Dry recycled material separately; the blending ratio shall not exceed 25%; store sealed after grinding; after adjustment, take continuous samples 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
Recycled material should be dried separately and blended in limited amounts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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