Extrusion & Post
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LLDPE film pinholes
Fenómeno do problema
Tiny pinholes appear on the film surface, becoming barrier defects after lamination.
Análise das causas
Gel rupture, bubbles, or impurity points form pinholes under high stretching; LLDPE high draw ratio applications expose them more easily.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solução
①Strengthen filtration to reduce gel; ②control raw '2079851475616104451; ③visual inspection positioning; ④optimize the stretching process.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusão principal
Pinholes are a quality red line for high-stretch film; source cleanliness and filtration are key.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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