The need for anti-static
The generation and harm of static electricity: in the normal production activities, the operator wears overalls between the external media surface (such as countertops, chairs, tools, appliances, etc.), between the layers of clothing, between the underwear and the skin. Even when walking between the sole and the floor, the clothing and shoes are charged due to frequent contact separation and friction, especially when wearing high-insulation chemical fiber clothing. The static charge of the clothing and shoes is gradually dispersed to the entire surface according to the law of the charge on the medium, and a certain static voltage is formed on the garment when the balance is reached. Of course, since the human body itself is a good conductor, the charging of the clothing will cause the human skin to be charged around the body due to electrostatic induction, and a certain static voltage is also formed. Thus, for the operator, there are two possible discharge channels; one is the discharge between the fingertip (skin) and the ground conductor, and the other is the discharge between the work clothes and the ground conductor. Both of these discharges can cause damage to static-sensitive devices. Although the anti-static wristband eliminates the first type of discharge hazard, it does not eliminate the second discharge hazard. This is because the wristband can only eliminate static electricity on the human skin as a good conductor, and it is impossible to leak static electricity on the more insulative clothing. People often only notice the elimination of static electricity on human skin, while neglecting or not paying enough attention to eliminate static electricity in clothing, which needs to be improved.
It should also be noted that it is generally believed that wearing cotton can prevent the static accumulation of clothing and thus it is safe, and the actual view is one-sided. This is basically the case when the relative humidity of the air is higher than 50%; and when the relative humidity is relatively low, the charge amount of the pure cotton product is significantly increased. Tests have shown that at a relative humidity of less than 30%, the charge of a cotton fabric is comparable to that of polyester; and when the relative humidity is less than 20%, the charge of a cotton fabric is even higher than that of some chemical fabrics. Therefore, in a dry climate, it is not expected to use any cotton products to eliminate the electrostatic hazard of clothing under any circumstances. In order to ensure production safety and eliminate unsafe hidden dangers, workers should wear anti-static overalls to eliminate static electricity generated by various reasons, especially petroleum, chemical, mine, electronics, military, aerospace, marine, port, textile, rubber, Special attention should be paid to places such as medicine, purification, etc., where there are static hazards, fires and explosion hazards.