Extrusion & Post
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LDPE Film Width Deviation
Problem Phenomenon
Finished film width fluctuates out of tolerance.
Cause Analysis
Film bubble lay-flat width fluctuation (air ring/extrusion fluctuation) and slitting position drift.
Solution
①Stabilize the film bubble; ②slitting deviation correction; ③online lay-flat width detection; ④stabilize haul-off.
Key Takeaway
Width stability = bubble stability + accurate deviation correction.
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