Extrusion & Post
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Poor roll formation of BOPP film
Problem Phenomenon
The film roll end faces are uneven, the hardness is uneven, the roll deforms after storage, and it deviates during unwinding.
Cause Analysis
Improper winding tension and taper curve settings; accumulated thickness deviation also makes roll formation irregular, affecting storage, transportation, and use.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Optimize winding tension and taper parameters; ②improve thickness uniformity; ③standardize storage conditions; ④regularly check the winding system.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Key Takeaway
Film roll quality is the concentrated embodiment of various deviations of the production line; tension management and thickness control need to be improved simultaneously.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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