Molding Process
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EVA foam surface large bubbles
Problembeschreibung
EVA foam large bubbles >2mm
Ursachenanalyse
AC locally agglomerated with decomposed large amounts of gas concentrated; foaming temperature too high with local overheating
Lösung
1) AC masterbatch method to ensure dispersion without agglomeration; 2) Temperature ±2°C; 3) DCP masterbatch method for uniform crosslinking
Wichtigste Erkenntnis
Large bubbles are caused by blowing agent agglomeration and uneven temperature; masterbatch method is key
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