Processing Machinery
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LDPE Insufficient Transverse Tear
Problem Phenomenon
LDPE film tears easily in the transverse direction
Cause Analysis
Insufficient transverse blow-up orientation causes anisotropic imbalance of tear strength; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Optimize the blow-up ratio; test longitudinal-transverse strength balance; adjust the grade; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate the effective measure
Key Takeaway
Transverse tear strength relies on blow-up ratio balance; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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