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Products: Conductive Silicone - exshield

General Information

Our E Range gaskets are constructed from silicone containing metal powder fillers which combine to produce high levels of attenuation with excellent environmental shielding and a high level of conductivity. Many types of filler, from nickel to pure silver, are available to suit a wide range of applications. There are also Flurosilicone variants for use in the presence of hydrocarbon contamination.

Applications

The Conductive Silicone Range was originally developed for high performance shielding mainly for military applications. However, the introduction of lower cost fillers has now made them accessible to the commercial sector. They are used where environmental and EMI screening is required but space constraints or stringent environmental protection necessitates a small cross section profile, often fitted into a groove or channel.

The E Range is best used where mating surfaces are smooth and well machined. They should be mounted to provide adequate voulme for the material to deflect under pressure and should be compressed by between 8 and 20% of their relaxed height for solid sections and between 20 and 100% of the height of the hollow centre of tubular sections. Moulded 'O' rings, gasket profiles and sheet materials all have their own compression characteristics according to how they are mounted and do not comply with the guidelines above.

Specifications

E Range Properties
Series   EC-Q EC-G EC-K EC-J EC-H EC-S EC-C
Filler Test Method Nickel Graphite Silver Glass Silver Nickel Silver Aluminium Silver Copper Silver Pure Carbon
Upper Operating Temp. Degrees C   +160 +160 +160 +160 +160 +160 +160
Lower Operating Temp. Degrees C ASTM D-1329 -50 -50 -50 -50 -50 -50 -50
Specific Gravity (±5%) ASTM D-792 1.99 1.75 4.60 2.00 3.02 3.20 1.19
Hardness Shore A (±5) ASTM D-2240 60 60 80 65 60 75 70
Elongation % (min) ASTM D-412 100 80 100 175 100 100 150
Compression Set % ASTM D-395 30 30 30 30 30 30 20
Tensile Strength Mpa (min) ASTM D-412 1.00 0.90 1.25 0.90 1.00 1.25 5.00
Volume Resistivity ohms/cm (max)   0.1 0.05 0.005 0.008 0.008 0.002 9.00
                 
Shielding Effectiveness (dB) MIL-G-83528 MIL285              
200 KHz (H-Field)   70 55 75 70 75 70 30
100 MHz (E-Field)   95 95 110 110 110 115 65
500 MHz (E-Field)   90 90 110 105 120 115 60
2 GHz (Plane Wave)   90 90 105 100 120 115 40
10 GHz (Plane Wave)   90 90 100 100 120 115 30

Download the Conductive Silicone Range as a PDF