Material Analysis
11 조회수
Unstable shrinkage of PU
문제 현상
Shrinkage of PU products fluctuates ±0.8%, exceeding the ±0.2% requirement
원인 분석
Molecular weight differences between PU batches cause shrinkage variation; processing temperature fluctuation affects crystallinity and thus shrinkage
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 is caused by batch differences and temperature fluctuation; raw material and temperature control are key
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