Processing Machinery
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PET capacitor film
Problem Phenomenon
BOPET film for capacitors breaks down in the voltage withstand test
Cause Analysis
Impurity gel particles and thickness deviations in the film form weak links that break down under high voltage; 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
Select capacitor-grade raw materials and high-precision filtration; online control of thickness uniformity; production in a clean workshop; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Capacitor film is produced with extreme control of impurities and thickness; 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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