Processing Machinery
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LLDPE temperature lower limit
Problem Phenomenon
LLDPE melt temperature set at 180℃, the film is poorly plasticized with many gel particles.
Cause Analysis
LLDPE melting point and viscosity are relatively high; too low a temperature gives insufficient plasticization; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting.
Solution
Raise the melt temperature above 195℃; check the heating system; appropriate back pressure; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; Change only one variable at a time and record parameter changes, to facilitate locating effective measures.
Key Takeaway
LLDPE temperature lower limit per 195℃ to ensure plasticization; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future.
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