Processing Machinery
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LLDPE film heavy-duty packaging bag
Problem Phenomenon
The heavy-duty packaging bag breaks in the drop test.
Cause Analysis
Heavy-duty packaging has high requirements for dart impact and seal strength; insufficient film thickness or a mismatched resin grade is the main cause.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solution
①Select a heavy-duty packaging dedicated grade; ②ensure the design thickness; ③optimize the heat sealing process; ④perform drop test verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Heavy-duty packaging is a demanding application; grade and thickness are the two guarantees.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future.
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