Thermoforming is typically used for the production of packaging articles as well as technical components. The range of materials which can be processed has increased significantly in the last years. In addition, different developments of machine technologies have opened up new areas of applications and increased the productivity of the machines. Because of that, the understanding of the influences of the different material properties on the thermoforming process is of great interest. Not only the material properties, but also the various machine technologies must be taken into account. In this article, the influences of different material properties on a reference thermoforming process are shown, using various packaging films. To evaluate the processability, the heating and deformation properties of the films were correlated with the results of the thermoforming tests. In this way, the material properties that have an influence on the processability and also on the product quality can be identified. Also it is shown that in addition to the heating and forming process, secondary process steps such as film transport also have an influence on the processability.