Molding Process
7 조회수
EVA foam hardness is too high
문제 현상
EVA foamed shoe sole Shore C50 is higher than C35-40
원인 분석
Density >0.3 with few cells, thick walls and hardness; crosslinking >80% with insufficient elasticity
해결 방법
1) Increase AC to 0.8-1wt% to reduce density to 0.25g/cm³; 2) Reduce DCP to 0.4-0.5wt% with crosslinking 60-70%; 3) VA18-28% to reduce viscosity and promote expansion
핵심 요약
High hardness is caused by high density and excessive crosslinking; reducing density and moderate crosslinking are key
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