Thermoforming
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PVC Blister Packaging
Problem Phenomenon
PVC blister shells had poor transparency and gel particles
Cause Analysis
Sheet plasticization quality and regrind ratio affect transparency; during on-site troubleshooting, verify item by item according to this mechanism to 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
Select transparent-grade sheet; control regrind ratio; uniform '2079851475616104458 temperature; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
Blister transparency relies on sheet quality and temperature control; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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