Electrostatic discharge materials
This article relies largely or entirely on a single source. (September 2014)
ESD materials are generally subdivided into categories with related properties: Anti-Static, Conductive, and Dissipative.
|Ohms Per Square||< 10−3||10−3 to 1||1 to 103||103 to 106||106 to 109||109 to 1012||> 1013|
|Description||Carbon powders and fiber||No initial charge. Provides path for charge to bleed off. Typically black color.||No or low initial charge. Prevents discharge to or from human contact||Initial charges are suppressed. Typically pink color.||Insulators and Base Polymers. Not an ESD material|
Conductive materials have a low electrical resistance, thus electrons flow easily across the surface or through these materials. Charges go to ground or to another conductive object that the material contacts.
Dissipative materials allow the charges to flow to ground more slowly in a more controlled manner than with conductive materials.
Anti-static materials are generally referred to as any material which inhibits triboelectric charging. This kind of charging is the buildup of an electric charge by the rubbing or contact with another material.
Insulative materials prevent or limit the flow of electrons across their surface or through their volume. Insulative materials have a high electrical resistance and are difficult to ground, thus are not ESD materials. Static charges remain in place on these materials for a very long time.
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