Processing Machinery
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PP Flame Retardant Modification
Fenómeno do problema
[Problem Phenomenon] Electrical parts need flame-retardant PP; selection evaluation
Análise das causas
PP itself is flammable; flame retardant modification (brominated/halogen-free phosphorus-nitrogen systems) achieves UL94 ratings; used for electrical housings and appliance parts; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solução
Select flame-retardant PP grades for flame-retardant parts; select phosphorus-nitrogen systems for halogen-free requirements; check rating and thickness against the UL Yellow Card; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PP flame retardancy relies on modification; halogen-free phosphorus-nitrogen is the trend; 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 similar future problems
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