Material Analysis
4 조회수
Bubbles in PU elastomer casting
문제 현상
Internal bubbles of 0.5-2mm in PU elastomer cast products
원인 분석
Insufficient mixing and degassing; casting temperature too low, viscosity high, bubbles difficult to discharge
해결 방법
1) Vacuum degassing for 5-10min after mixing; 2) Increase casting temperature to 60-80°C to reduce viscosity and discharge bubbles; 3) Cast slowly to avoid air entrapment
핵심 요약
PU casting bubbles are caused by insufficient degassing; vacuum degassing is key
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