Processing Machinery
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PET baby bottle
Problem Phenomenon
Disposable PET baby bottles deform after steam-boiling sterilization
Cause Analysis
The heat resistance temperature of ordinary PET bottles is below the boiling sterilization temperature, and thermal deformation is unavoidable; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry materials and should be confirmed first during troubleshooting
Solution
For steam-boiling sterilization scenarios, switch to heat-resistant PP or PPSU; PET baby bottles are limited to disposable use and are not boiled; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PET bottles do not withstand boiling sterilization, and the disinfection method determines the material selection; 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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