What is the function of anti-static shielding bags
Generally, anti-static packaging bags themselves do not easily generate static electricity. However, when electrostatic discharge (ESD) occurs outside the packaging bag, due to their poor shielding performance, the electronic components inside the bag can be affected by the external ESD (electrostatic discharge), and may even be damaged. Components that are highly sensitive to static electricity can still be damaged.
For example, some factory components are qualified and packaged in anti-static bags before leaving the factory, but upon arrival at the customer's location, some PCB boards or components are found to be malfunctioning. This is because although the anti-static packaging bag itself does not easily generate static electricity, it cannot shield against external ESD. For example, during transportation, static electricity from handling machinery can cause ESD from the machine mannequin (MM), and static electricity from the bodies of loading and unloading workers can cause ESD from the human body mannequin (HBM) or metal mannequin. Therefore, the surface resistance of ordinary anti-static packaging bags is insufficient to shield against external ESD. For such components, anti-static shielding bags should generally be selected.
Antistatic shielding bags not only possess all the antistatic properties of antistatic packaging bags, but also shield against electrostatic discharge (ESD) and external electromagnetic radiation from personnel and equipment. They are composed of multiple layers of highly conductive and anti-electromagnetic materials and are typically opaque. Antistatic shielding bags are more expensive than traditional antistatic packaging bags.
They can be used for packaging sensitive devices where antistatic and electromagnetic interference protection are critical.
Other properties: Electromagnetic interference attenuation, puncture resistance, and water vapor permeability are all superior to those of traditional antistatic packaging.