Extrusion & Post
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Temperature-sensitive fluctuation of BOPP film
Problem Phenomenon
When the production temperature fluctuates, the mechanical properties, thickness, and appearance of the film fluctuate simultaneously.
Cause Analysis
BOPP is highly sensitive to processing temperature; fluctuations in stretching and heat-setting temperatures directly change the orientation and crystallization state, thereby affecting all properties.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Install a precision temperature control system across the whole line; ②stabilize the settings of each temperature zone according to the process card; ③monitor the temperature trend and set alarms; ④regularly calibrate thermocouples.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Key Takeaway
Temperature stability is the foundation of BOPP quality consistency; the return on investment in precision temperature control is directly reflected in the qualification rate.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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