Molding Process
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LLDPE rotomolding application
Problem Phenomenon
LLDPE rotomolded products have many bubbles and insufficient strength, or are undercooked or overcooked
Cause Analysis
LLDPE for rotomolding needs to be ground into uniform 35-mesh powder; bubbles are a sign of undercooking; overcooking causes warpage and deformation; bubble monitoring is the key to judging doneness
Solution
①Grind LLDPE into uniform 35-mesh particles; ②monitor the degree of bubble disappearance during baking; ③extend baking when bubbles are many, shorten it when warped; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Doneness judgment in LLDPE rotomolding relies on bubbles; 35-mesh powder plus bubble monitoring is the core of process control; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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