Material Analysis
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PVC Inherent Flame Retardancy Advantage
Problem Phenomenon
ABS used for electronic and electrical parts needs flame retardant added; after switching to PVC, it passed flame retardant certification
Cause Analysis
PVC's oxygen index is about 45% and it is naturally self-extinguishing, meeting flame retardant requirements without adding flame retardants; ABS's oxygen index is only 18%, so flame retardants must be added, which also affects other properties
Solution
①Prioritize evaluating PVC in flame-retardant-required scenarios; ②pay attention to PVC's processing difficulty and temperature resistance upper limit; ③fully leverage the inherent flame retardancy advantage for electrical housings; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Inherent flame retardancy is PVC's core competitiveness; PVC should have a default seat in the material selection list for electrical and electronic applications; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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