Coatings and sealants shield equipment from EMI
Coatings and sealants from Parker Chomerics provide a stable EMI environment for electronic equipment. The company has introduced Pro-Shield coatings and shields which allow users to provide plastic components with a stable EMI shield. The Pro-Shield products can be used in the electronics, telecomms and medical equipment markets.
Pro-Shield 7100 is a nickel-filled electrically conductive coating for a cost-effective EMI shielding for plastic parts or electronic enclosures. The durable acrylic coating protects uses the nickel filler’s ferromagnetic properties, which absorb electromagnetic waves to shield over a range of frequencies.
No mixing is required for the Pro-Shield 7100. It is easy to use, says Parker Chromerics and cures fully within two to four hours, providing a shielding effectiveness of 45 to 60dB. Suitable applications range from electronic housings, medical devices, industrial cabinets and access panels, through to engine control modules, telecomms infrastructure and portable electronics.
For higher EMI protection in the same applications, Chomerics has released the Pro-Shield 7108 electrically conductive coating. This silver-filled coating provides EMI shielding and surface conductivity to protect critical electronic equipment.
It is available in aerosol cans and can be sprayed on prototypes and used for performing initial qualification testing. This acrylic coating cures fully in 24 hours, providing shielding effectiveness of 70 to 89dB.
Both Pro-Shield 7108 and Pro-Shield 7100 provide strong adhesion to plastics that include polycarbonate (PC), epoxy, ABS, PC / ABS, PVC and PPE.
The third introduction is the Pro-Shield 7002. This is a corrosion-resistant electrically conductive silicone sealant. It is nickel-plated and graphite-filled and is described as an easy-to-use sealant or gap filler for use on horizontal or vertical surfaces. It flows smoothly, says Parker Chromerics for application on parts with complex geometries and difficult-to-fill crevasses. It is a cost-effective way to reduce EMI in commercial electronics, added the company as well as commercial aircraft.
The product is tack-free in 24 hours and cures fully in seven days, delivering a shielding effectiveness of 40 to 60dB. It is available in 6oz tubes.
Chomerics is a division of Parker Hannifin Corporation and is part of the Engineered Materials Group. It specialises in development and application of electrically and thermally conductive materials in electronics, transportation and alternative energy systems.
