BOPP capacitor film must pass more than an incoming thickness check before metallization. Web cleanliness, flatness, tension and deposition conditions can all affect electrode uniformity and later winding behavior.
An engineering plastic film manufacturer needs the film gauge, roll width, metallizer settings and defect map. Dafu supplies ultra-thin capacitor-film grades, while the customer's metallization process determines the finished electrode.
Record roll identification, gauge profile, edge condition and surface cleanliness. Retain samples from left, center and right lanes before they enter the metallizer.
Compare nonuniformity with web position, roll diameter and machine events. Separate repeating mechanical marks from random particles or deposition changes.
Evaluate slit rolls and wound elements under the customer's electrical method. Send Dafu the film data, deposition conditions, electrode map and failed samples.
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