ESD protective shoes (anti-static shoes)
The sole of the ESD shoe is made of synthetic rubber with conductive carbon black to leak the electrostatic charge carried by the ESDS device operator to the ground to prevent the accumulation of static electricity on the human body.
The national standard GB4386-84 "Safety Technical Conditions for Anti-static Rubber-soled Shoes and Conductive Rubber-soled Shoes" stipulates that the resistance of anti-static soles is 5×104～108 ohms, and the resistance of conductive shoes is not more than 1.5×105 ohms. The difference in use between anti-static shoes and conductive shoes is that anti-static shoes can be used in an environment with electrical equipment and can prevent electric shocks to the human body caused by a voltage of 250 volts. Conductive shoes cannot be used in environments where there is a risk of electric shock.
In order to ensure the elimination of human body static electricity, the resistance value between the ground and the earth when the shoes are put on should be no more than 108 ohms and 0.5×105 ohms respectively. During the transfer process, no insulation should be stained on the bottom of the shoe and the transfer of insulating socks is prohibited.