Special performance of safety helmet

(1) Electrical insulation performance: tested according to the prescribed method, with a leakage current not exceeding 1.2mA.
(2) Flame retardant performance: tested according to the prescribed method, with a continuous combustion time of no more than 5 seconds, and the cap shell must not burn through.
(3) Lateral rigidity: Tested according to the prescribed method, the maximum deformation shall not exceed 40mm, residual deformation shall not exceed 15mm, and there shall be no fragments falling off the cap shell.
(4) Antistatic performance: Tested according to the prescribed method, the surface resistance value shall not exceed 100 million ohms.
(5) Low temperature resistance: Conduct impact testing after pre-treatment at low temperature (-20 ℃), and the force transmitted to the head mold shall not exceed 4900N; The cap shell must not have any fragments falling off; Then, another sample is pre treated at (-20 ℃) and subjected to puncture testing. The steel cone must not come into contact with the surface of the head mold, and the cap shell must not have any fragments falling off.