This dataset describes the mixing process of 1 kg of rubber raw materials and compounding agents, resulting in the production of 0.97782 kg of mixed rubber. This dataset should be used together with 1 kg of raw materials. The data are derived from the production processes of rubber conveyor belts and some other rubber products. The dataset includes major raw and auxiliary materials, energy consumption, and atmospheric emissions of the mixing process. Infrastructure such as manufacturing of production equipment and construction of factory buildings are not included within the system boundary of this dataset.