Extrusion & Post
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HDPE film poor corona treatment
Problem Phenomenon
Poor corona treatment effect before printing, poor ink adhesion.
Cause Analysis
Corona power/speed mismatch, electrode contamination, slip agent migration on the film surface hindering the treatment effect.
Solution
①Calibrate corona power and speed; ②clean the electrodes; ③evaluate slip agent migration; ④print promptly after treatment.
Key Takeaway
Corona effect = power + cleanliness + timeliness.
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