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EMI:
EMI Shielding Gaskets
EMI shielding gaskets are used to provide an electrically conductive seal for electronic equipment openings and housing covers to prevent or restrict electromagnetic interference.
Conductive Silicone Rubber for EMI Shielding Gaskets
The main advantage of EMI shielding gaskets fabricated from conductive elastomers is the combined benefit of environmental sealing over a broad temperature range and EMI shielding. These materials are typically silicone rubber or fluorosilicone rubber with embedded silver plated aluminum particles, silver plated glass beads, silver plated copper particles, nickel-graphite particles or conductive carbon. Many of these materials meet the properties of Mil-G-83528B. Some newer conductive silicones are very compressible, in the 30 to 45 durometer Shore A range. Conductive silicone rubber materials are typically molded into sheets then die cut or water jet cut to the final gasket configuration.
Oriented Wire in Silicone Rubber
Silicone impregnated oriented mesh products provide .030", .062" and .125" thick solid silicone rubber shielding products. These gasketing materials tend to be less costly than conductive silicone materials, with EMI properties provided by oriented Monel mesh (QQ-N-281) and Aluminum mesh (AMS-4182, alloy 5056).
Conductive adhesive backings
Conductive metal fiber filled acrylic adhesive backings can be applied to many conductive gasket materials.
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