Electronics workshops should use anti-static clothing.
During normal production activities, workers' work clothes and external surfaces (such as work surfaces, chair seats, tools, and equipment), between layers of work clothes, between underwear and skin, and even between shoe soles and the floor when walking, all become charged due to frequent contact, separation, and friction. This charge is particularly exacerbated when wearing high-performance synthetic fabrics. Localized static charges on clothing and shoes gradually dissipate across the entire surface, following the flow of charge in the medium. When equilibrium is reached, a certain static voltage is generated on the clothing. Of course, since the human body is a good conductor, the charge on work clothes can also charge the entire skin due to electrostatic induction, also generating a certain static voltage. This presents two possible discharge paths for workers: one between the fingertips (skin) and the grounded conductor, and the other between the work clothes and the grounded conductor. Both types of discharge can damage electrostatic-sensitive devices. While anti-static wrist straps can eliminate the first type of discharge risk, they cannot eliminate the second. This is because wristbands can only dissipate static electricity on human skin, a good conductor, but cannot dissipate static electricity on clothing, which has strong insulating properties. People often focus solely on eliminating static electricity on the skin, while neglecting or underemphasizing static electricity on clothing. This requires improvement.
When people engage in various activities, the static voltage on clothing far exceeds the electrostatic discharge damage threshold of many electrostatic-sensitive devices. Touching or approaching these components can damage these sensitive devices. It should also be noted that the common belief that wearing pure cotton work clothes prevents static electricity accumulation and is therefore safe is actually one-sided. This is generally true only when the relative humidity is above 50%. At lower relative humidity, the charge on pure cotton products increases significantly. Tests have shown that at relative humidity below 30%, the charge on pure cotton fabrics is comparable to that on polyester; at relative humidity below 20%, the charge on cotton fabrics is even higher than that on some synthetic fabrics. Therefore, in dry climates, pure cotton products cannot always be used to eliminate the hazards of static electricity on clothing.
Anti-static clothing refers to work clothes made of anti-static fabric to prevent static electricity accumulation on clothing. Anti-static fabric is a fabric that is roughly evenly or evenly mixed with conductive fibers or anti-static synthetic fibers or a mixture of the two during weaving. Conductive fiber is a general term for fibers made of conductive materials or sub-conductive materials made entirely or partially of metal or organic matter, and its volume resistivity ρv~ is between 104 and 109 Ω·cm. According to the distribution of conductive components in the fiber, conductive fibers can be divided into three categories: uniform conductive component type, conductive component covered type and conductive component composite type. At present, the vast majority of anti-static fabrics are made of conductive fibers, among which the conductive component composite type, that is, composite fibers, are the most commonly used.