Processing Machinery
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LDPE Film Flame Retardant Blooming
Problem Phenomenon
White bloom appears on the flame-retardant film surface, affecting appearance and heat sealing.
Cause Analysis
The flame retardant has limited compatibility with the base material and migrates to the surface to bloom out; when the flame retardant proportion in the formulation is too high, blooming accelerates.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Compound a synergistic flame retardant system to reduce single-component dosage; ②Add 0.3% erucamide to improve migration; ③Evaluate switching to reactive flame retardants; ④Verify the blooming cycle.
Key Takeaway
Blooming is an inherent risk of migratory additives; formulation optimization is more effective than process adjustment.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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