Processing Machinery
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PET vs PC bottle selection
Problem Phenomenon
After replacing PC barrels with PET for large water barrels, the drop breakage rate is high
Cause Analysis
PC toughness and impact resistance are far superior to PET; the drop and washing conditions of reusable barrels are harsh; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Keep PC or Tritan for reusable water barrels; PET is suitable for disposable bottles; select materials according to number of uses and drop conditions; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Reusable containers require PC-level toughness; PET is positioned for single use; 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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