Mineral Powders for the Cable & Wire Industry

The cable and wire industry has stringent requirements for mineral fillers used in insulation and sheathing compounds, including electrical insulation resistance, flame retardancy, and smooth processing characteristics. China clay (kaolin) is one of the most valued mineral fillers for cable insulation compounds. Its fine plate-like particle structure provides excellent electrical insulation properties due to its low dielectric loss factor, improved heat resistance, enhanced flame retardancy, and smooth extrusion characteristics. Calcite powder (calcium carbonate) is extensively used in cable sheathing compounds where it serves as a cost-effective filler that maintains mechanical properties and weather resistance of the outer cable jacket. Ground Calcium Carbonate (GCC) provides a premium option for cable compounds where ultrafine particle size is required for smooth extrusion and consistent insulation thickness, particularly suited for thin-wall insulation cables.