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Conductive antistatic bags are manufactured with a layer of conductive metal, often aluminum, [3] and a dielectric layer of plastic [2] covered in a static dissipative coating. This forms both a shield and a non-conductive barrier, shielding the contents from static charge via the Faraday cage effect.
An antistatic wrist strap with crocodile clip. An antistatic device is any device that reduces, dampens, or otherwise inhibits electrostatic discharge, or ESD, which is the buildup or discharge of static electricity. [1] [2] ESD can damage electrical components such as computer hard drives, and even ignite flammable liquids and gases.
It was developed by Custom Materials, now part of 3M. [2] Velostat is a U.S. registered trademark (4,964,564) of Desco Industries Inc. Desco Industries purchased the assets of the 3M Static Control business on January 2, 2015. [3] Velostat is piezoresistive; its resistance changes with flexing or pressure.
Conductive ESD bag with a network card inside ESD shoes. Electrostatic discharge materials (ESD materials) are plastics that reduce static electricity to protect against damage to electrostatic-sensitive devices (ESD) or to prevent the accidental ignition of flammable liquids or gases.
Effectiveness of the shielding of a static electric field is largely independent of the geometry of the conductive material; however, the static magnetic fields can penetrate the shield completely. In the case of varying electromagnetic fields, the faster the variations are (i.e., the higher the frequencies), the better the material resists ...
3M launched "Press 'n Peel" a sticky bookmark page holder in stores in four cities in 1977, but the results were disappointing. [ 36 ] [ 37 ] A year later 3M instead issued free samples of it as a sticky note directly to consumers in Boise, Idaho , with 95% of those who tried them indicating they would buy the product. [ 36 ]
(The conductor does not respond to static magnetic fields unless the conductor is moving relative to the magnetic field.) The result is that electromagnetic radiation is reflected from the surface of the conductor: internal fields stay inside, and external fields stay outside. Several factors serve to limit the shielding capability of real RF ...
The International Electrotechnical Commission publishes the 60079 series of standards [2] which defines a system for classification of locations, as well as categorizing and testing of equipment designed for use in hazardous locations, known as "Ex equipment". IEC 60079-10-1 covers classification of explosive gas atmospheres, and IEC 60079-10-2 ...