Electronics
Protective equipment for live working - Detection of electrostatic protective clothing
Protective equipment for live working - Detection of electrostatic protective clothing
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Protective equipment for live working - Detection of electrostatic protective clothing

The principle of anti-static protective clothing is to prevent the accumulation of static electricity on the clothing, using anti-static fabric as the fabric and sewing protective clothing. Anti static fabric is a fabric that is roughly evenly or evenly mixed with conductive fibers, anti static synthetic fibers, or both during weaving. Conductive fibers refer to the general term for fibers made entirely or partially of conductive or sub conductive materials made of metal or organic matter, and their volume resistivity ρ V - between 104-109 Ω/cm. According to the distribution of conductive components in fibers, conductive fibers can be divided into three types: uniform conductive component type, covered conductive component type, and composite conductive component type. At present, the vast majority of anti-static fabrics are made of conductive fibers, with conductive composite fibers being the most commonly used. The anti-static protective clothing made by adding conductive fibers to the chemical fiber fabric is based on two mechanisms of charge leakage and neutralization for electricity dissipation. When grounded, the static electricity on the fabric can not only be neutralized by the corona discharge of conductive fibers, but also be discharged to the ground through conductive fibers; When not grounded, it is dissipated by the weak corona discharge of conductive fibers. Static electricity is a static state of charge that can be generated by the friction between dry objects. The electromagnetic field generated by electrostatic discharge has a strong intensity, which has a short action time but is much stronger than the electromagnetic field radiated by mobile phones. The number of discharges is very high, and its effect on the human body cannot be ignored. If the human body is exposed to high electrostatic radiation for a long time, it may experience symptoms such as restlessness, headache, chest tightness, difficulty breathing, and cough. In dry seasons, if you wear synthetic fiber clothing and insulated shoes while walking on insulated ground, the static electricity on the human body can reach several thousand or even tens of thousands of volts. According to the test, the fingers can feel it; Sparks appear when the voltage exceeds 3000 volts, and there is a needle like pain in the fingers; When the voltage exceeds 7000 volts, people feel an electric shock. Medical experts have confirmed through research that skin electrostatic interference can alter the normal potential difference on the human body surface and affect the normal electrophysiological processes of the myocardium. This static electricity can worsen the patient's condition, and persistent static electricity can also increase the alkalinity of the blood, causing skin itching, pigmentation, affecting the physiological balance of the body, and interfering with emotions. So the probability of facial diseases such as erythema and pigmentation in office white-collar workers who operate computers every day is much higher than those who do not use computers. This is because the static electricity generated by computer screens attracts a large amount of suspended dust, causing facial irritation. An anti-static clothing that can prevent static electricity in daily work is made by adding conductive fibers to chemical fiber fabrics. Its power dissipation is based on two mechanisms: charge leakage and neutralization. When grounded, the static electricity on the fabric can not only be neutralized by the corona discharge of conductive fibers, but also be discharged to the ground through conductive fibers; When not grounded, it is dissipated by the weak corona discharge of conductive fibers, as detailed in the national standard for anti-static work clothes. [1]

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