Conductive Elastomers
Conductive Elastomers are fully cured silicones or fluorosilicone loaded with electrically conductive particles providing superior EMI/RFI shielding performance combined with excellent environmental sealing. The various conductive fillers are designed to ensure galvanic compatibility whilst providing low contact resistance between mating surfaces.
Features
Features & Benefits
- Highly conductive EMI/RFI gasket and environmental seal
- Performs in wide temperature range -55˚C +160˚C
- Fluorosilicone for harsh environments: Fuel oils and solvents
- Choice of materials for galvanic compatibility
- Flame retardant UL94 V-0 rating (molding grade only)
Kemtron Ltd., now part of TE Connectivity Extended product portfolio
Contact information
United Kingdom
Phone: +44 (0) 1376 348115
Email : info.braintree@te.com
France
Phone: + 33 (0) 160778316
Email : info.braintree@te.com
Germany
Phone: +44 (0) 1376348115
Email: info.braintree@te.com
Rest of Europe
Phone: +44 (0) 1376348115
Email: info.braintree@te.com
Asia
Phone: +44 (0) 1376348115
Email : info.braintree@te.com
Conductive Fillers available for silicone and fluorosilicone
- Nickel Plated Graphite: A high quality cost effective commercial material with increased use in the military markets. Easily extruded or moulded. SNG FR grade to UL94 V-0.
- Silver Plated Aluminium: An excellent grade high performance material widely used for higher frequency applications in the commercial and military markets. Lighter in weight than some other materials.
- Nickel Plated Aluminium: This material offers the best corrosion performance with aluminium metalwork and a high degree of shielding effectiveness with test data up to 40 GHz.
Design Considerations
- It is important that this material is not over-compressed. If the design of the equipment does not allow for any mechanicalmethod of preventing over-compression, the gasket should be fitted with built-in compression limiters, either metal stops fitted to the gasket, or metal collars fitted into each fixing hole.
- The material is not suitable in sliding applications.
- Recommended compression: 10% to 20%.
- Self-adhesive backing (conductive or non-conductive) is offered as an assembly aid only.
- Fluorosilicone: self-adhesive backing is not recommended for use with this type of elastomer.
- Minimum material width should not be less than 2mm or at least the material thickness in any part of the gasketIf this cannot be achieved around fixing holes consider using a slot. Particular attention is required if specifyingcompression collars in holes.
- Consideration must be given to compression forces, hole centres, size and number of fixings and rigidity of mating flanges.
- Integral compression stops or collars should be considered to limit over compression if external controls cannot be applied.Recommended minimum sheet thickness for integral limits is 1.5mm.
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Kemtron Acquisition
Kemtron Ltd., a leading player in the RFI/EMI shielding, environmental sealing, gaskets and components, is now part of TE Connectivity. Together, TE and Kemtron will offer more design capabilities and make the impossible possible.
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