Molding Process 5 조회수

EVA foam locally unfoamed

문제 현상

EVA foamed shoe material has local hard lumps with density >0.5g/cm³

원인 분석

Blowing agent AC locally undecomposed due to insufficient temperature; DCP locally excessive with premature crosslinking suppressing expansion

해결 방법

1) Mold temperature ±2°C to ensure global decomposition; 2) DCP masterbatch method to ensure uniform crosslinking; 3) AC masterbatch method to ensure dispersion

핵심 요약

Local unfoamed areas are caused by insufficient temperature and uneven crosslinking; uniform temperature control and masterbatch method are key

EVA foam local unfoamed blowing agent dispersion mold temperature control uniform crosslinking

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EVA foam locally unfoamed

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