Anti-static bag: the way the anti-static bag is shielded
Because of the Faraday effect, if there are creases or small holes in the shielding bag, it is better to throw it away and not to damage the components inside because of the cost of saving the bag. There is also a special need to pay attention to, manufacturers do not want to be cheap or convenient, buy anti-static shielding bags with poor inventory or long time without anti-static function, such bags anti-static function has been greatly reduced, or according to the anti-static effect .
In the MIL-B-81705C scale document, if it is sufficient to make any of the premise, it can be regarded as invalid: the electrostatic discharge decay rate is greater than 2 seconds; the attenuation electromagnetic interference is less than 10dB; the bag body has small holes and the diameter is greater than 2mm Can not shield electrostatic discharge events below 30kV; the surface resistance per square area inside and outside is greater than 10^12, and the internal resistance per level is less than 10^5. Particle counter
Its unique four-layer structure creates a sensor cover effect to protect the contents of the bag from the electrostatic field. In addition, the inner layer is composed of static ethylene which can be eliminated, and the antistatic effect is obvious. The inner and outer layers of the anti-static shielding bag material are made of transparent anti-static material, and the middle is a translucent conductive metal layer, so it has good anti-static and electrostatic shielding function.
Static electricity is ubiquitous in everyday life and work environment, and static electricity may be generated according to different weather conditions or actions. So, for products that require static protection, can this anti-static shielding bag really function as a complete shield? We analyze its shielding according to the product structure.
Anti-static shielding bags are more commonly used for the packaging of static-sensitive circuit boards, precision parts and electronic components. It protects static-sensitive components from potential electrostatic hazards to the greatest extent, and their unique Faraday cage construction creates a sensing hood effect and provides shielding and anti-static effects on the contents of the bag.