Production & Quality
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EVA surface blooming precipitation
Problem Phenomenon
White frost-like low molecular substances precipitate on the EVA product surface, affecting appearance
Cause Analysis
Low molecular components in EVA migrate to the surface and precipitate during storage; lubricant or plasticizer supersaturated precipitation
Solution
1) Select high molecular weight EVA to reduce low molecular substances; 2) Reduce lubricant addition amount to a reasonable level; 3) Clean the product surface and then test to identify the source
Key Takeaway
Blooming is caused by low molecular migration and precipitation; selecting high molecular weight grades is fundamental
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