Molding Process
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PPO Flame-Retardant Grade System
Problem Phenomenon
[Problem Phenomenon] When selecting PPO grades for parts with flame-retardant requirements, the V-0/V-1/HB ratings are confusing
Cause Analysis
PPO flame-retardant grades cover UL94 V-0 to HB: BHM510 (V-0, HDT 110°C), SFG series (V-0), SE1-GN reinforced (V-1), etc.; halogen-free and halogen-containing systems coexist
Solution
Select the grade corresponding to the UL rating and thickness according to the product standard; choose the halogen-free system for halogen-free requirements; check the UL Yellow Card for certification status; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Select PPO flame-retardant grades according to the UL Yellow Card, and the rating and thickness must match; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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