Extrusion & Post
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LLDPE film slip agent migration
Problem Phenomenon
The slip effect changes over time; the friction coefficient is unstable.
Cause Analysis
Slip agent migration to the surface takes time; temperature and thickness affect the migration rate, and excessive slip agent also blooms out affecting heat sealing and printing.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solution
①Control the slip agent addition amount; ②specify testing time points; ③balance slip and heat seal requirements; ④select the slip system by application.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Slip agent management is a time-dependent subject; standardization of dosage and testing timing is critical.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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