Supershield Conductive Elastomers |
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> Conductive filler types
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Our Supershield Conductive Elastomers are a group of high performance EMI gasket materials that provide an optimal combination of superior shielding effectiveness combined with excellent environmental sealing. They are produced by dispersing conductive metal particles in an elastomer carrier (normally silicone or fluorosilicone) forming a homogenous gasket material with high conductivity.
There are a range of conductive fillers and elastomer combinations that are suitable for virtually any application that may be encountered. Conductive elastomers are extremely versatile and are available in the following forms ExtrusionAn extremely wide range of cross-sections are available including ‘O’ sections, ‘D’ sections, ‘U’ channels, square/rectangular strip as well as custom sections to suit specific applications. Some profiles, such as ‘O’ and ‘D’ sections can be produced as hollow sections where lower compression forces are required or a greater tolerance range must be accommodatedGasket sections can be supplied in continuous lengths, cut lengths or joined to form gaskets. Gaskets produced in this way are joined by ‘vulcanising’, that is to say that a small piece of the original material is used to form the joint using heat and pressure producing a very high quality gasket. Extruded conductive elastomer profiles can be joined to form rings e.g. ‘o’ rings, picture frames (mitred joints) or more complex shapes. In general terms this is the most efficient means of producing gasket sections or gaskets using conductive elastomers Moulded pre-form then die-cutThis is the preferred method for producing ‘flat’ gaskets such as waveguide and connector gaskets. The material is moulded as a sheet or ‘frame’ and then as a secondary operation the gaskets are punched out. This technique allows economical production of parts, saving material in the case of larger gaskets and enabling many smaller parts to be punched from a single moulding Custom mouldingsConductive elastomers may be moulded directly to form specific parts such as cable glands, complex gaskets, insert mouldings etc. All of the above fabrication methods are suitable for both low and high volumes General propertiesVery high shielding possible with appropriate flange/enclosure materials and finishes - typically attenuation figures comfortably in excess of 100dB can be achieved up to 10GHz
ApplicationsConductive elastomers find uses in many different applications and generally where a combination of very high shielding and environmental protection are required from a single gasket. They were originally mainly used for military applications but more efficient production methods along with increasing more demanding uses in commercial equipment have seen their use become more widespread. Typical uses include
Conductive Elastomer Datasheets
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