Extrusion & Post
10 조회수
Material Overflow at EVOH Vacuum Vent
문제 현상
Material overflows at EVOH extrusion vacuum vent, vent hole clogged
원인 분석
EVOH melt viscosity low, overflowing at vacuum section; vacuum section temperature too high, viscosity even lower, aggravating overflow; vent hole design improper
해결 방법
1) Reduce vacuum section temperature by 5-10°C to increase viscosity; 2) Add baffle above vent hole to prevent overflow; 3) Increase screw speed to accelerate conveyance and reduce residence
핵심 요약
Overflow is caused by low melt viscosity; cooling and adding baffle are key
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