EMI Shielding Materials EMI

The metallic foil offerings include aluminum foils with thicknesses from 6μm to 100μm, featuring adhesive backing systems with controlled tack levels for permanent or removable installation, and specialized alloys including copper-nickel and stainless steel for applications requiring enhanced corrosion resistance or mechanical durability.

The conductive fabric technologies incorporate metallized textiles with various base materials including polyester, nylon, and cotton that are plated with copper, nickel, or silver through electrodes or electroless deposition processes. These fabrics achieve surface resistivities as low as 0.05 ohms per square while maintaining flexibility, drape characteristics, and breathability for applications requiring conformal shielding.

These materials employ conductive fillers dispersed within polymer matrices to create electrically continuous networks that reflect and absorb electromagnetic energy. The thermoplastic formulations include polycarbonate, ABS, nylon, and PEEK loaded with stainless steel fibers at concentrations from 5% to 40% by volume, achieving surface resistivities from 1 to 100 ohms per square while maintaining mechanical properties suitable for injection molding of complex enclosure geometries.

The thermoset composite materials incorporate conductive fillers including carbon fibers, carbon nanotubes, and graphene nanoplatelets within epoxy, polyester, or silicone matrices, providing shielding effectiveness up to 60dB at 1GHz with thicknesses as low as 1mm.

The EMI gasket portfolio encompasses conductive elastomers, wire mesh, oriented wire, and fabric-over-foam designs that provide reliable electrical continuity across seams and joints while compensating for surface irregularities and mechanical tolerances. The conductive elastomer gaskets employ silicone or fluorosilicone matrices loaded with silver-plated aluminum, silver-plated copper, or nickel-graphite fillers at volume loadings from 30% to 80%, achieving volume resistivities from 0.001 to 0.1 ohm-cm.

The shielding sheet materials provide planar attenuation solutions for enclosure interiors, cable wrappings, and compartment separations. These include conductive foams with open or closed cell structures metallized with copper, nickel, or aluminum through vacuum deposition or electrodes plating processes, achieving shielding effectiveness up to 90dB at 1GHz with compressibility up to 80% of original thickness.

The beryllium copper finger stock gaskets employ precisely formed spring fingers that provide multiple contact points along mating surfaces, with deflection characteristics engineered for low closure force while maintaining adequate contact pressure for reliable conductivity. These gaskets are available in various profiles including C-shaped, V-shaped, and knitted mesh configurations, with plating options including tin, nickel, silver, or gold for specific corrosion resistance or contact resistance requirements.

The conductive fabric-over-foam gaskets combine the compressibility of urethane or silicone foam cores with the conductivity of metallized fabric covers, providing environmental sealing alongside electromagnetic shielding. The foam densities range from 5 to 30 pounds per cubic foot, with compression-deflection curves engineered for specific sealing requirements.