Production & Quality
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PPO Foaming Grade Processing
Problem Phenomenon
【Problem Phenomenon】PPO foaming grades (FN85, etc.) foam unevenly and density is out of control
Cause Analysis
Foam grade PPO (FN85, FMC3008, SFG series) UL94 V-0; the matching of foaming ratio and melt strength determines cell quality; too high temperature causes cell collapse, too low causes insufficient foaming
Solution
Process foaming grades according to the dedicated temperature window; precisely meter foaming agent or masterbatch ratio; verify density and flame retardant grade retention; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO foaming material has a narrow temperature window; verify both density and flame retardancy indicators; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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