Explanation

The property that materials can be ignited in the flame and continue to combustion. flammability grade is usually used to identify the difficulty of combustion of substances. When materials are used as building materials, the flammability grade of materials must be specified. flammability UL94 is the most widely used flammability standard for plastics materials. It is used to evaluate the ability of materials to extinguish after being ignited. There are many evaluation methods according to combustion speed, combustion time, anti dripping ability and whether droplets combustion. The flame retardant grades of plastics include HB, V-2, V-1 and V-0, and the test methods include horizontal burning method and vertical burning method.

Classification