Extrusion & Post
4 조회수
LLDPE blown film high extrusion pressure
문제 현상
High head pressure and large torque; forced to raise temperature, which in turn triggers degradation risk.
원인 분석
LLDPE melt viscosity is large, screw torque and barrel pressure rise; a narrow die exit further raises back pressure.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
해결 방법
①Add PPA to reduce extrusion pressure; ②appropriately widen the die exit; ③optimize temperature distribution; ④evaluate high-flow grades.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
핵심 요약
LLDPE processing pressure management relates to energy consumption and equipment life; PPA can reduce consumption by 30~60% while improving surface quality.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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