What is the meaning of the plastic raw material fire rating HB?
HB level is not the meaning of fire.
Plastic flame retardant grade from HB, V-2, V-1 to V-0 step by step increase: HB Hu Gong Hong Kong folder fan locust song Wei attack: UL94 and CSAC22.2No0.17 standard in the bottom of the flame retardant grade. It is required that for samples of 3 to 13 mm thick, the burning rate is less than 40 mm per minute; samples less than 3 mm thick, the burning rate is less than 70 mm per minute; or extinguished before the 100 mm mark. V-2: After two 10-second burn tests on the sample, the flame is extinguished in 60 seconds. There can be a burning thing falling. V-1: After two 10-second burn tests on the sample, the flame is extinguished in 60 seconds. Can not have a burning thing falling. V-0: After two 10-second burn tests on the sample, the flame is extinguished in 30 seconds. Can not have a burning thing falling. Clearly please adopt!
HB is the lowest level of fire rating, it can be said is not fire.
