Filler masterbatch is a type of additive used in the plastics industry. It consists of a high concentration of filler material, such as calcium carbonate, talc, or other minerals, dispersed in a carrier resin. The primary purpose of filler masterbatch is to enhance the properties and reduce the cost of plastic products. It is added to plastics to improve various properties, such as stiffness, dimensional stability, impact resistance, and thermal conductivity.