Molding Process
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Decay after corona treatment of PLA film
Problem Phenomenon
The surface tension of PLA film decreases rapidly with time after corona treatment.
Cause Analysis
The migration of surface active segments of PLA causes the corona effect to decay rapidly; the corona energy is insufficient and the treatment is inadequate.
Solution
Use higher corona power and treatment time; perform subsequent processing (printing, laminating) as soon as possible after treatment.
Key Takeaway
PLA corona decays quickly, and the production rhythm needs to be reasonably arranged.
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