Basic requirements for helmets

1.1 Impact absorption performance: use three safety helmets to handle at 50±2°C (40°C under the mine), -10±2°C and water immersion, then use 5Kg steel hammer to fall from 1m height. In the test, the maximum impact force of the head mold should not exceed 4900N.

1.2 Penetration resistance: According to the material of the helmet, 50±2°C, -10±2°C and water immersion are used for treatment. Then, the 3KG steel cone is used to test from 1m height. The steel cone should not be tested. Contact with the head mold.

A safety helmet is a protective product that protects the head from impact. It consists of a cap shell, a cap liner, a lower cheek band and a rear cuff. The cap is hemispherical, strong, smooth and flexible, and the impact and puncture kinetic energy of the striker is mainly absorbed by the cap. There is a space between the cap and the cap liner to cushion and disperse the instantaneous impact force, thereby avoiding or reducing direct damage to the head. Impact suction performance, puncture resistance, lateral rigidity, electrical insulation, and flame retardancy are requirements for the basic technical performance of the helmet.

other requirements

2.1 Low temperature resistance: The impact absorption performance and penetration resistance of helmets below -10 °C shall comply with the requirements of 2.1.1 and 2.1.2.

2.2 Combustion resistance: Burn the helmet for 10 seconds with the flame and method specified in GB2812-2006 "Hard Cap Test Method". After removing the flame, the shell flame should be self-extinguishing within 5 seconds.

2.3 Electrical insulation performance: AC 1200V withstand voltage test for 1 minute, leakage current should not exceed 1.2mA.safety shoes

2.4 Lateral rigidity: The pressure of the helmet shall be increased by 43kg in the transverse direction according to the method specified in GB2812-2006. The maximum deformation of the cap shall not exceed 40mm, and the deformation after unloading shall not exceed 15mm.