Production & Quality
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Rapid Decay of Corona Treatment on PE Film
Problem Phenomenon
After corona treatment of PE film, the dyne value drops rapidly within a short time, and print adhesion is still poor.
Cause Analysis
The corona treatment effect decays with storage time, and the continuous exudation and migration of slip agent to the surface also covers the treatment effect; high ambient humidity and high storage temperature accelerate the decay.
Solution
①Print as soon as possible after corona treatment to shorten storage time; ②Control slip agent dosage and select a low-exudation system; ③Re-test the dyne value before printing, and perform a second corona treatment if necessary; ④Control storage temperature and humidity; ⑤Manage printing film with dedicated control.
Key Takeaway
PE corona is extremely 'time-sensitive': printing right after treatment is an iron rule, and slip agent exudation is an invisible killer; the dyne value should be managed as a dynamic indicator that decays over time.
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