Electrical Properties

Anti-static and conductive properties of rubbers are defined by measuring their electrical resistances. Typical measurements are obtained through the thickness of a sample by using 25mm sq electrodes under a pressure of 45N and applying a voltage of 500V DC @ approx 6mA. (Energy dissipated into the test piece is limited to 3W max.) The surface should be cleaned before measuring. Patterned surfaces should be wetted with a conductive solution or paint. Results should be recorded in W, defining the conditions of testing. See ASTM D991 D257