The GMP workshop clothing worn by operators is charged when in contact with the external medium, between layers of clothing, between underwear and the skin, between the sole and the floor, and when walking in between the sole and the floor. Static voltage is produced in clothing and shoes as a result of local electrostatic charge. Charges are dissipated by the law of dissipation of charge on the medium and dissipated throughout the surface to balance the charge on a certain static voltage. Electrostatic induction and human skin around the body may both be responsible for charging the clothing. Two discharge channels are available for operators: the fingertip (skin) and the discharge between the grounding conductor, and the discharge between the work clothes, and the grounding conductor. Both may cause damage to electrostatic-sensitive devices. The static voltage on the clothing while performing various tasks is greatly above the threshold for electrostatic discharge on many of the sensitive devices, which can consequently cause damage if contact or approach occurs. Generally, cotton work clothes are believed to be able to prevent electrostatic clothing accumulation, but this is one-sided, with a relative temperature of 50% or higher required, and a relative humidity percentage of less than 30% required. When relative humidity is lower than 30%, the amount of cotton fabrics charged with polyester is higher than that of chemical fiber fabrics, while the amount of cotton fabrics charged is higher than that of some chemical fiber fabrics when relative humidity is less than 20%. Because dry climate areas cannot be eliminated with cotton garments, electrostatic hazards cannot be eliminated in any case. Anti-static work garments should therefore be worn to prevent the discharge of human static electricity.
GMP workshop clothes are created from anti-static, dust-resistant clean material. They are thin, smooth, and have distinct weaving patterns. The particles produced during the manufacturing process are lowered by the usage of overlock machines. The dust-free Velcro straps prevent rabbits from contaminating the environment by shedding lint. Consistent electrical continuity is maintained in garments of different styles by using conductive thread. Sleeve tube bottoms have a special double-layer structure that preserves electrical continuity. The inner layer is made of conductive or anti-static ribs to maintain a dust-free environment.
The lining of clothing should be made of anti-static material; the lining should not account for more than 20% of the inner surface area of the garment. Make sure you wear an anti-static coat (blue).
The choice of different levels of anti-static fabrics and anti-static work clothes should be based on the static sensitivity of different processing objects in different places.
It is recommended that work clothes be washed using simple methods and that washing should be avoided if it involves more mechanical or chemical washing.
Do not wear or attach any metal objects to your anti-static work clothes.
It is forbidden to put on or take off electrostatic sensitive products at the operating site. Buttons should be fully buttoned down, avoiding a state of near undress.
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