The engineering plastic fireproof zone is divided into halogen-containing flame retardants and halogen-free flame retardants.
"Halogen-containing flame retardants" are flame-retardant chemicals containing halogen. 80% of halogen-containing flame retardants are bromine (Br) flame retardants, but the corrosive gases generated during the flame retardant process and brominated dioxin/ Furan (PBDD/PBDF) will cause harm to the environment and human body. EU RoHS has banned the use of halogenated flame retardants since 2006.
In order to meet the needs of environmental protection, the development of "halogen-free flame retardants" tends to be mainstream, among which "phosphorus flame retardants" have become the focus of the field of flame retardant epoxy resins.
According to the US UL94 fire safety test, the fire rating can be divided into:
V-2: After two 10-second burn tests on the sample, the afterflame and afterburn were extinguished within 60 seconds. The dripping particles can ignite the cotton.
V-1: After two 10-second burn tests on the sample, afterflame and afterburn were extinguished within 60 seconds. Drip particles should not ignite cotton.
V-0: After two 10-second burn tests on the sample, afterflame and afterburn were extinguished within 30 seconds. Drip particles should not ignite cotton.
Polyamide 6 and nylon 66 have good electrical and electronic properties, arc resistance, long-term heat resistance, especially excellent fire resistance. By adding fire retardants, the flame retardant properties can reach UL94 V-0.
