Extrusion & Post
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LDPE Paper-Plastic Lamination
Problem Phenomenon
Interlayer delamination of paper-plastic laminated film
Cause Analysis
Insufficient melt temperature or pressure during extrusion lamination results in weak bonding; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Optimize extrusion lamination temperature and pressure; pretreat the paper; test peel strength; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate the effective measure
Key Takeaway
Lamination delamination relies on temperature, pressure, and pretreatment; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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