Antistatic bag

src: upload.wikimedia.org

An antistatic bag is a bag used to store electronic components, which are susceptible to damage caused by static discharge (ESD).

This bag is usually polyethylene terephthalate plastic (PET) and has a distinctive color (silver for metallized film, pink or black for polyethylene). Variants of polyethylene can also be in the form of foam or bubble wrap, either as sheets or bags. Some layers of protection are often used to protect against mechanical damage and electrostatic damage. Protected devices can be packed inside a pocket of a pre-calibrated PET film, in a pink polyethylene bubble bag, which is eventually packaged in a stiff black polyethylene box coated with pink poly foam. It is important that the bag is only opened in a static free workstation.

The dissipative antistatic bag, as the name implies, is made of standard polyethylene with a layer or a static dissipative layer on the plastic. This prevents the accumulation of static charges on the surface of the bag, as it throws the load to the ground (ie, whatever surface is touched). The bridge to the ground is achieved by the inclusion of fatty amines on the surface of the bag that attract water vapor that can carry the charge to another surface, or to the atmosphere itself. In this sense, this type is really 'antistatic' because it blocks the formation of static charges. It, however, is not resistant to electrostatic discharges; if something else with a charge touches the bag (like a person's hand), its charge will be easily transferred through the bag and its contents. This bag is usually pink or red because of dissipative chemical layer. Black pockets also exist, in which polyethylene is made containing a number of carbon footprints, forming a partial shield, though not a complete one.

Conductive antistatic pouches are made with a conductive metal coating, often aluminum, and a dielectric layer of plastics coated with a static dissipative layer. It forms a shield and a non-conductive barrier, protecting the contents of the static charge through the effects of the cage Faraday. These bags are preferred for more sensitive parts, but they also see use in environments where sparks would be dangerous, such as oxygen-rich areas in airplanes and hospitals. Metalized bags are more brittle than their non-metallic counterparts, however, as each puncture compromises the integrity of the shield. In addition, they have limited shelf life, because the metal substrate may worsen over time. These bags are often gray or silver because of metal layers, while still transparent to some degree.

Foam is also present in both pink (dissipative) and black (conductive) varieties, used to store individual leaded components with piercing leads into the foam.

Video Antistatic bag

See also

• ESD material
• An antistatic device
  • Antistatic clothes
  • Antistatic Agents
  • Antistatic mats
  • Antistatic wrist strap
• Electromagnetic Shield
• Electrostatic sensitive device
• Velostat

Maps Antistatic bag

References

src: www.elementssupply.com

Further reading

• Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & amp; Children, 2009, ISBN 978-0-470-08704-6
• ANSI/ESD S541 [1]

Source of the article : Wikipedia