Processing Machinery
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LLDPE film regrind usage
Fenómeno del problema
After blending in regrind, bubble stability and film surface quality decline.
Análisis de la causa
Regrind melt index changes and may bring in impurities; LLDPE is more sensitive to the regrind proportion.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solución
①Control the regrind proportion; ②dry the regrind and remove impurities; ③monitor the blended melt index; ④limit regrind for key products.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusión clave
LLDPE regrind management must be stricter than LDPE; melt index monitoring is a necessary control means.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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