The Thermal Dryer is used for further reduction of the residual moisture content in material flake. In most cases is the thermal dryer necessary for materials that will be processed through an extruder after the washing phase. The thermal dryer consists of: Heating register, mixing element, transport blower, and a down stream spiral formed piping with final cyclone separator. The heating register is equipped with an adjustable temperature range which allows for consistent material heating temperature relative to the ambient temperatures. This feature ensures a satisfactory final residual moisture content and lowers energy costs.