BOPP capacitor film should not be specified as standard or heat-resistant from the application name alone. Selection depends on operating temperature, short process exposure, voltage stress, metallization and winding design.
An engineering plastic film manufacturer needs the complete temperature profile and capacitor construction. Dafu lists conventional and heat-resistant vapor-deposition polypropylene film categories in its 2–4 μm product range.
Drying, metallization and element treatment may create short thermal cycles, while the capacitor faces a different long-term condition. Record both, including duty cycle, cooling and expected hot spots.
Review thickness uniformity, surface condition, shrinkage under agreed conditions, electrical behavior and winding stability. Use the same slit width, metallization pattern and winding settings for comparisons.
Run the customer’s electrical, thermal and humidity tests on wound elements. Send Dafu the gauge, temperature profile, metallization route and failure mode.
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