Material Analysis
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LDPE Processing Temperature Upper Limit
Problembeschreibung
After raising temperature to improve plasticizing, the product discolors, molecular weight decreases, and performance deteriorates.
Ursachenanalyse
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.
Lösung
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.
Wichtigste Erkenntnis
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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