CONDUCTIVE ELASTOMERS FOR RFI/EMI SHIELDING

摘要

Kemtron manufactures a range of conductive Elastomers as gaskets and gasket strip for emi shielding of electronic devices. The base Elastomer is silicone for normal environments and Fluorosilicone for fuel and oil resistance, both offer a wide temperature range of -40degC to +160degC and up to +200degC for some grades. The conductive fillers available are silver plated aluminium, silver plated copper, pure nickel and nickel coated graphite, with others available to special order.The manufacture of a conductive Elastomer is a balance of conductive particle loading and distribution throughout the silicone base; the distribution must be sufficient to ensure that the particles are in contact with each other for good conductive path through the Elastomer, but without too great a loading to cause the silicone to lose its elastomeric properties. In general the conductive Elastomer will have a shore A hardness of between 60 and 75 depending on grade and still maintain good tensile strength.