Abstract: The temperature of deflection under load, glow-wire ignition temperature and comparative tracking index and so on of halogen-free flame retardant PP materials were tested, and the glow-wire experiment, injection experiment and drop experiment were carried out. Research shows that halogen-free flame retardant PP material thermal deformation temperature under load is 105℃, glow-wire ignition temperature is 850℃, comparative tracking index is 600 V, flame retardant level of 2 mm thickness is 5VA, flame retardant performance is comparable to ABS material. The electrical control box parts made of flame retardant PP material have no burning through and deformation problems in the whole machine's heating wire and injection. In the drop test of the whole machine, the electrical control box is free of fracture, deformation and damage. It can replace flame-retardant ABS for switching application on electrical control box.

Key words: Halogen-free flame retardant, Electrical control box, Glow-wire ignition temperature, Injection experiment