Processing Machinery
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LLDPE film blending ratio fluctuation
Problem Phenomenon
LDPE/LLDPE blended film properties fluctuate between batches.
Cause Analysis
Inaccurate metering of the blending ratio or uneven mixing; the melt viscosity difference between the two phases makes dispersion difficult.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solution
①Precisely meter the blending ratio; ②optimize screw mixing; ③test properties batch by batch; ④fix the ratio in the process card.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Blended film performance stability relies on metering and mixing; ratio management is the foundation of quality.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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