The use of additives has always been one of the most successful methods of modifying polymer properties, including processability and physical and mechanical properties of polymers in various applications. Although the design of formulations and production of additive masterbatches for various products is particularly complex, the design of formulations for the production of additive masterbatches has made the acquisition of technical knowledge for the production of this category of masterbatches a very key position in polymer processing. Although the selection of materials is particularly complex, Pouya Polymer Tehran Company, by employing prominent researchers in its research and development department, has succeeded in producing a significant number of additive masterbatches with quality comparable to European products and making them available to its domestic and foreign customers.