Production & Quality
10 조회수
EEA performance degradation with repeated processing
문제 현상
EEA after 3-4 times of recycling and reprocessing shows tensile strength decline of 25-30%
원인 분석
Molecular chains break and degrade under repeated high temperature and shear; antioxidant exhausted in multiple processing; cumulative effect of thermo-mechanical degradation
해결 방법
1) Recycled material proportion not exceeding 20-30%; 2) Supplement 0.1-0.2wt% antioxidant at each re-extrusion; 3) Reduce processing temperature by 5-10°C; 4) Reduce screw speed to reduce shear
핵심 요약
Performance degradation from multiple processing is caused by thermo-mechanical degradation; limiting recycled material and supplementing antioxidant are the key
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