ISO 1853, ISO 1278, ISO 2951

Rubber polymers are in themselves electrical insulators and rubber is also used in many instances as insulation for electrical cables etc. When carbon black is compounded in the rubber, the electrical conductivity is increased and the rubber becomes a semi-conductor. With special types of carbon black, the rubber can also be made more conductive.

In order to determine the electrical conductivity or resistance, several different methods can be used. In principle, a voltage is applied across a rubber test piece and the electrical current, which passes through the rubber, is measured. This may appear uncomplicated, but it is difficult to achieve in practice since often very small currents have to be detected in addition the resistance of rubber changes with temperature, time of electric exposure and physical stress.

Elastocon offers test equipment for determination of the electrical conductivity or resistance in rubber or plastic material for cables.