What is the reason for the failure of anti-static shoes detection?
Anti-static shoes belong to special labor protection products. Wearing anti-static shoes can effectively release the electrostatic charge carried by the human body. It is one of the effective and reliable ways to eliminate static electricity. However, the anti-static shoes in special labor protection footwear have a higher detection failure rate than other footwear. What is the reason for this?
According to the standard requirements of GB21146-2007 "Personal protective equipment professional shoes" and GB/T20991-2007 "Test methods for personal protective equipment shoes", when testing anti-static shoes, it is found that under dry conditions, the electrical performance test is unqualified, The primary factor that causes the unqualified rate of anti-static shoes is high, which is also an important item for anti-static performance testing. In the anti-static performance test, it is found that at present, the electrical properties of the anti-static shoe outsole and midsole produced by most enterprises can meet the standard requirements. However, electrical performance testing requirements for antistatic shoes include active cushions in the shoe. Combined with the qualification rate of anti-static shoes in recent years, it is found that the great factor affecting the anti-static performance is the quality of the anti-static insole.
At present, there are five kinds of anti-static insoles commonly available on the market, leather materials (forefoot and metal-containing conductive fiber) type, PU (polyurethane) or EVA (ethylene-vinyl acetate copolymer) materials (forefoot and seams) Type of metal conductive fiber), PU or EVA material (with rivets on the forefoot to fix the small metal mesh and insole under the insole) type, PU or EVA material (anterior rivet) type, environmentally friendly high polymer cotton (Bao Liyou, Haibo Li and other materials are added to the type of antistatic agent hot stamping. Regardless of the material of the anti-static insole, the conductive principle is generally through a conductive medium (such as metal conductive fiber, rivets, metal mesh, antistatic agent, etc.), through the midsole conductive electrode or anti-static material to connect the outsole, will The static electricity of the human body is introduced into the earth.
The key to the electrical performance of anti-static shoes is the quality of the insole. If the product is not qualified because of a pair of insoles, it will not be worth the loss. Anti-static shoes are not ordinary civilian shoes. When purchasing, special attention should be paid to the selection of insoles to avoid unnecessary losses.