Processing Machinery
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POM medical parts
Problem Phenomenon
POM medical device parts deform after sterilization
Cause Analysis
The temperature of high-temperature steam sterilization exceeds POM's heat resistance, and repeated sterilization causes deformation; 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 data and should be confirmed first during troubleshooting
Solution
Switch steam-sterilized devices to PEEK/PPSU; limit POM to disposable or non-sterilized devices; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
POM does not withstand repeated steam sterilization; 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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