1. Concept of Flame Retardancy Ratings Flame retardancy rating testing evaluates a material’s ability to resist flame propagation. Common standards include UL94, IEC 60695-11-10, and GB/T 5169.16. UL94, “Test for Flammability of Plastic Materials for Parts in Devices and Appliances,” classifies flame retardancy into 12 levels: HB, V-2, V-1, V-0 5VA, 5VB VTM-0, VTM-1, VTM-2 HBF, HF1, HF2 These ratings are determined based on test severity and material type.… The post Summ...
