Production & Quality
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LLDPE melt temperature 200-260℃
Fenómeno do problema
Low melt temperature causes insufficient filling; high melt temperature causes product discoloration and degradation, and prolongs the cycle.
Análise das causas
LLDPE's short branched chain structure gives good melt fluidity, with a processing window of 200-260℃; too high a temperature gives better fluidity but slower cooling, a longer cycle and possible degradation.
Solução
①'2079851475616104452 melt temperature 200-260℃ adjusted by product; ②film extrusion optimized by grade; ③beware of thermal oxidative degradation above 280℃; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusão principal
LLDPE's wide temperature window reflects process friendliness; but high-temperature residence also causes degradation, and leniency does not mean no boundary; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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