Processing Machinery
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LLDPE film heat seal initiation temperature
Problem Phenomenon
Heat sealing equipment needs higher temperature to seal, affecting efficiency.
Cause Analysis
LLDPE's heat seal temperature window differs from LDPE; comonomer type affects the seal initiation temperature.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solution
①Set the heat seal temperature according to the resin data sheet; ②evaluate mLLDPE to lower the seal initiation temperature; ③optimize heat seal parameters; ④make a heat seal curve.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The heat seal window is determined by resin structure; mLLDPE can widen the window and lower the seal initiation temperature.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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