Extrusion & Post
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LDPE Film Ultra-thin Production Film Breakage
Problem Phenomenon
Ultra-thin film below 10μm breaks frequently, and the yield is difficult to improve.
Cause Analysis
Ultra-thin film has extremely high requirements for melt strength, uniformity, and cleanliness; tiny defects are all stretched and amplified into break points.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Add nano nucleating agent to improve melt strength; ②Gradient cooling with zone temperature control; ③Strengthen filtration; ④Set the blow-up ratio conservatively.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Ultra-thin film requires systematic upgrading of material and process; single-item adjustment is difficult to work.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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