Molding Process
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LLDPE Film Gel
Problem Phenomenon
Gel particles and fisheyes on the film surface.
Cause Analysis
Unplasticized particles, cross-linked substances, or impurities; LLDPE's difficult plasticization makes unmelted-particle-type gel more common.
Solution
① Strengthen plasticization and mixing; ② use finer filter screens; ③ clean dead corners of the die head; ④ control regrind.
Key Takeaway
For LLDPE gel, the insufficient-plasticization type is the first suspect.
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