Material Analysis
4 조회수
LDPE Processing Temperature Upper Limit
문제 현상
After raising temperature to improve plasticizing, the product discolors, molecular weight decreases, and performance deteriorates.
원인 분석
Although LDPE has good thermal stability, long-term high temperature still causes thermal oxidative degradation; degradation accelerates above 280℃; molecular chain scission at high temperature reduces both strength and toughness.
해결 방법
①Control processing temperature below 280℃; ②Avoid long-term high-temperature residence; ③When discoloration occurs, immediately lower temperature and purge; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
핵심 요약
LDPE's temperature upper limit also exists; the 280℃ red line plus residence management prevents oxidative degradation; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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