Conductive Compounds
Generally, conductive thermoplastic compounds exhibit surface resistivities in the 1,000 - 100,000 ohm/sq range. Volume resistivities tend to have lower values, 200 - 10,000 ohm-cm. At these resistivity levels, the static decay rate will be well below two seconds, meeting military specification MIL-81705B. Conductive compounds are permanently conductive and are not dependent on relative humidity.
Certain grades of conductive compounds can be produced with resistivities approaching one ohm-cm. These materials can be used for some applications where shielding against electromagnetic interference is required.
Modern Dispersions, Inc. has recently developed static dissipative compounds with resistivities in the 1,000,000 - 2,000,000 ohm/sq range. These compounds are used where a slower discharge of static is desired.
There are many combinations of polymers, carbon blacks and other additives which can be used to engineer specific properties required in a compound. Modern Dispersions, Inc. has the ability to utilize these components to create these new materials as desired.
Modern Dispersions, Inc., 78 Marguerite Ave.. Tel: 978-534-3370; Fax: 978-537-6065.