Molding Process 7 조회수

Large compression set of PU

문제 현상

PU product compression set >30%, below the 15% requirement

원인 분석

PU elastic recovery insufficient; crosslinking degree too low, plastic deformation unrecoverable; density too low, cell walls thin, poor recovery

해결 방법

1) Increase crosslinking degree to 60-70% to reduce plastic deformation; 2) Select high elastic recovery PU grade; 3) Add reinforcing filler

핵심 요약

Large compression set is caused by insufficient crosslinking; increasing crosslinking degree is key

PU compression set crosslinking degree elastic recovery reinforcing filler

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