Conductive Elastomers (Cho-Seal
Industries Served:
EMI Shielded Conductive Elastomers (Cho-Seal® and Cho-Sil®) from Chomerics
Sealing Devices offers emi shielded conductive elastomers consisting of silicone, fluorosilicone, EPDM or fluorocarbon-fluorosilicone binder with a filler of pure silver, silver-plated copper, silver-plated aIuminum, silver-plated nickel, silver-plated glass, nickelplated graphite, or unplated graphite particles. Chomerics’ conductive elastomers feature excellent resistance to compression set over a wide temperature range, resulting in years of continuous service. All Chomerics conductive elastomers meet MIL-STD-810 requirements for fungus resistance and in addition to EMI shielding, these materials can also act as an environmental or pressure seal if required.
CHO-Seal® emi shielded elastomers are available for both military and commercial applications, but excel in aerospace applications. Specialty shielded conductive elastomers are also available for low closure force, waveguide, and corrosive environments.
Conductive seals are available as extruded elastomers, and can be cut-to-length. They are available in many profiles including: Hollow or Solid 'D'; Hollow or Solid 'O'; Hollow 'P', rectangle, and many other shapes. Depending on width, they can also be ordered with pressure-sensitive adhesives (PSA) applied.
Co-extruded strips provide optimal emi shielding while providing corrosion protection. When conductive and non-conductive elastomers are vulcanized together, they create a techincally superior design for aircraft doors, rack mounted cabinetry, military or commercial communications and other applications.
|
Material
|
Filler and Binder
|
Shielding
|
Remarks
|
|
CHO-SEAL 1278
|
silver-plated nickel
|
>100 dB
|
High performance in non-corrosive environments; molded parts only; no fluid resistance. |
|
CHO-SEAL 1285
|
silver-plated aluminum
in silicone |
90-110 dB
|
Military gasket of choice for corrosive environments; lightweight, 200°C max. use temperature; good EMP resistance; molded, extruded and reinforced. |
|
CHO-SEAL 1287
|
fluorosilicone
version |
||
|
CHO-SEAL 1298
|
silver-plated aluminum
|
90-110 dB
|
High performance in harshest corrosive environments; material of choice for aircraft and marine military applications, good physical properties; molded, extruded or reinforced. Best corrosion resistance among Chomerics’ conductive elastomers. |
|
CHO-SEAL
S6304, S6305,6370 |
nickel-coated graphite in silicone
|
>100 dB
|
Good performance in moderately corrosive environments; material of choice for flange finishes needing “bite-through” for good electrical contact; flame retardant 6370 is UL 94V-0 rated. |
|
CHO-SEAL L6303
|
fluorosilicone
version |
||
|
CHO-SEAL 1298 gaskets are available as molded, die-cut and extruded seals. CHO-SEAL 1298 gasket material offers excellent resistance to commonly used fluids and fuels used in aviation and industrial applications. |
|||
Click on a link below to view table
Conductive Elastomer Specifications Table 1
Conductive Elastomers Specifications Table 2
Standard Extrusions - Sealing Devices offers many shapes and types of extruded conductive elastomers from industry leader Chomerics. Below are a small sampling of the profiles and sizes available. For more profiles or sizes, please call, or refer to the full Chomerics EMI shielding handbook.
Standard Extrusion Sizes