Processing Machinery
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HDPE Engine Oil Bottle
Problem Phenomenon
Engine oil bottle body discolors after long-term storage
Cause Analysis
Additives in engine oil interact with HDPE over the long term, and ultraviolet light accelerates aging; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Select oil-resistant grades for engine oil bottles; store away from light; choose migration-resistant color masterbatch; 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
Engine oil bottles are designed for oil resistance and light protection; after confirming effectiveness, solidify 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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