Material Analysis
11 조회수
EVA shrinkage rate is unstable
문제 현상
EVA product shrinkage rate fluctuates ±0.8%, exceeding the ±0.2% requirement
원인 분석
Molecular weight differences between EVA batches cause shrinkage rate changes; processing temperature fluctuations affect crystallinity and thus the shrinkage rate
해결 방법
1) Strictly control raw material batch consistency; 2) Stabilize processing temperature ±2°C to ensure consistent crystallinity; 3) Reserve adjustment space for mold shrinkage compensation
핵심 요약
Unstable shrinkage rate is caused by batch differences and temperature fluctuations; raw material and temperature control are key
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