Why ESD shielding bags can discharge static electricity
The ESD shielding bag can discharge static electricity, because the surface of the body bag (inside, outside or both) has conductivity and is in contact with another conductor (ESD grounding plate). For the ESD shielding bag to discharge the charge, it must be conductive, While connected to a conductor (usually grounded), the anti-static bag has anti-static properties and can be unshielded, conductive or MVB. All anti-static measures mean that the friction charging of the anti-static bag will not exceed a certain voltage (usually 250V).
ESD shielding bags should have foil or conductive tape in various parts of the bag, depending on the device you want to protect. Bags made with conductive, antistatic, shielding, and water vapor barrier substances protect nearly all sensitive devices, but may be overprotected.