Extrusion & Post
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LDPE Film Slip Agent Blooming
Problem Phenomenon
White powdery precipitation appears on the film surface after storage.
Cause Analysis
Slip agent/antiblock agent is over-added, exceeding the compatibility limit and precipitating to the surface; affecting printing and lamination.
Solution
①Reduce additive addition amount; ②switch to slow-migrating polymeric additives; ③control storage temperature; ④clean and evaluate precipitated film before use.
Key Takeaway
Blooming = excessive additive precipitation.
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