Material Drying
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Delamination of PE Film Lamination
Problem Phenomenon
After dry lamination of PE film, peel strength is low, tunnel effect or delamination occurs, and the laminated product is scrapped.
Cause Analysis
Excessive exudation of slip agent on the film surface hinders adhesive wetting; excessive or insufficient corona treatment, film surface contamination, and improper adhesive ratio and curing all cause insufficient bonding force at the lamination interface.
Solution
①Select a low-slip/low-exudation system for lamination film; ②Control the corona degree (meeting the standard is enough, do not overdo it); ③Clean the film surface; ④Standardize the adhesive mixing ratio and curing process; ⑤Carry out peel strength sampling inspection and retain samples.
Key Takeaway
For PE lamination delamination, first check 'slip agent migration' — this is the most hidden and most commonly overlooked culprit; corona, cleaning, adhesive mixing, and curing are interlinked, and loss of control in any link will cause delamination.
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