The role of anti-static clothing to protect against static electricity
Anti-static clothing is a special work clothes with dust-free and anti-static properties suitable for electronics, optical instruments, pharmaceuticals, microbiological engineering, precision instruments and other industries. Its clothing is generally a synthetic fabric with conductive yarns embedded. The anti-static work clothes made by adding conductive fibers to chemical fiber fabrics are based on two mechanisms: leakage and neutralization of charges. The production process of the anti-static fabric used is mainly to mix in all or part of the anti-static fiber or anti-static synthetic fiber made of metal or organic conductive materials at approximately equal intervals or evenly during weaving, or the two are mixed and interwoven. . When grounded, the static electricity on the fabric is neutralized by the corona discharge of the conductive fiber, and can also be discharged to the ground through the conductive fiber; when it is not grounded, the weak corona discharge of the conductive fiber is used to dissipate the electricity.
Anti-static clothing is sewn with anti-static special fabrics to prevent the accumulation of static electricity in clothes. It is suitable for use in static-sensitive industries, fire or explosion hazards and other places with a large amount of static electricity.
Friction electrification and human body static electricity are the two major sources of hazards in the electronics and microelectronics industries, but the generation of static electricity is not the hazard. The hazard lies in the accumulation of static electricity and the resulting electrostatic charge discharge, so it must be controlled. The static electricity on the equipment or the human body can reach tens of thousands of volts or even hundreds of thousands of volts, and it often reaches hundreds to thousands of volts under normal operating conditions. The human body can carry thousands of volts or even tens of thousands of volts of static electricity due to factors such as its own actions and contact-separation, friction or induction with other objects. In the production process of electronic products, the components and components of finished products often come into contact with, separate from equipment and tools, and generate static electricity due to friction. Anti-static cushions, turnover carts, maintenance kits, tools, work chairs (stools), etc. must be used, and Through proper grounding, static electricity can be discharged quickly.
An object with static electricity will form an electrostatic field around it, which will produce mechanical effects, discharge effects and electrostatic induction effects. Due to the mechanical effect of static electricity, floating dust particles in the air will be adsorbed on silicon chips and other electronic components, which will seriously affect the quality of electronic products. Therefore, anti-static measures must be taken to purify the working space.
The harm caused by static electricity to the industry and electronics industry has attracted more and more attention from various fields. In order to eliminate unnecessary losses caused by static electricity, technical personnel in related industries are forced to speed up and increase the research of anti-static technology. Through more than ten years of scientific research and development, all countries have jointly established anti-static standards, and the production and application of various related anti-static equipment has also provided a good environment for industrial development.