Finding the Right Conductive Elastomer EMI Gasket For You
Four of the reasons why CHO-SEAL® conductive elastomer electromagnetic interference (EMI) gaskets are the right EMI shielding solution. Once used mainly to shield critical defence and aerospace electronic systems, Parker Chomerics conductive elastomers have become the progressive choice for designers of consumer, telecommunications, industrial equipment, automotive, medical devices and much more.
Conductive elastomers are reliable over the life of the equipment, and the same gasket is both an EMI shield and an environmental seal. Elastomer gaskets resist compression set, accommodate low closure force, and help control airflow. They’re available in corrosion-resistant and flame-resistant grades. Their aesthetic advantages are obvious: almost any elastomer profile can be extruded or custom molded with modest tooling costs and short lead times for either prototypes or large orders.
Parker Chomerics offers hundreds of standard molded and extruded products, but we can can also take a customer-supplied design and deliver finished parts. Molded products provide moisture and pressure sealing and EMI/EMP shielding when compressed properly in seals, flanges, bulkheads, and other assemblies. Extrusions provide similar benefits and are also readily lathe-cut into washers, spliced, bonded, kiss-cut, or die-cut to reduce installation labour and to conserve material, resulting in a cost-effective alternative to other methods of EMI shielding and environmental sealing.
Product Features and Benefits:
Nearly any shape or design possible
Many different filler material options available
Cost effective while maintaining high performance
Available in corrosion-resistant and flame resistant grades
Step 1. Determine Binder Material
It's very important to understand the level oc chemical resistance your EMI shielding elastomer gasket will require. Below is an example table of common exposures and fluids our customers are exposed to. Generally, a silicone gasket will be the right choice, however, there will be times -- especially in military or high end settings where an EPDM gasket is necessary.
Step 2. Determine Filler Material
Once you have determined the binder material that is appropriate for your application, it's time to determine the filler material. Our array of conductive elastomers offers true flexibility in selecting the appropriate material for a specific applications on the basis of cost and level of attenuation required. Price varies directly with shielding performance. Please view our Conductive Elastomer Engineering Handbook for further detail.
Step 3. Determine CHO-SEAL Gasket Configuration
Sheet Stock Ready To Cut
D-Subminiature EMI Gaskets
Co-Extruded Conductive Profiles
Conductive Elastomer Flat Washer Gaskets
Extruded EMI Gaskets
Conductive Elastomer Jam Nut EMI Seals
Conductive Elastomer Molded Gaskets
Molded Reinforced Seals
This article was produced by Parker Chomerics. JHC Specialised Solutions are the exclusive authorised distributor for Parker Chomerics in Australia and New Zealand. Should you require any further information or wish to discuss a customised solution for your application, please contact JHC on +61 2 9531 7905 or firstname.lastname@example.org