Method for extruding a homogeneous polymer composition, which has a degree of gelation of 5% to 80%, an elongation at break of 0 to 270%, and a tensile strength of at least 1 N/mm 2, from an uncompounded polyvinyl chloride, characterized in that the quantity of energy introduced into the polymer composition within the method, as indicated by the specific energy input, is 0.03 to 0.09 kWh/kg, the polymer composition consisting substantially of 30 to 80 wt% of polyvinyl chloride, 0.5 - 5 wt% of a stabilizing additive, 0 - 40 wt% of a solid constituent, and 5 - 40 wt% of a plasticizer, liquid at room temperature, for the polyvinyl chloride, where the figures in wt% are based in each case on the total weight of the polymer composition, and where the method comprises the steps of feeding polyvinyl chloride in uncompounded form into an extrusion apparatus having at least one rotor, which has at least three kneading and/or mixing zones and is capable of both transporting and mixing the mixture, feeding the polyvinyl chloride and stabilizing additive into the extrusion apparatus through a first inlet, which is disposed in the vicinity of the drive unit and adjacent to a first conveying segment section of the at least one rotor; feeding the plasticizer to the polyvinyl chloride mixed with the stabilizing additive through at least two inlets at a distance from one another, the plasticizer being added in at least two portions each of about 20-80 wt%, based on the total weight of the plasticizer, to the polyvinyl chloride, there being a kneading and/or mixing zone disposed between the addition of the individual portions, working the plasticizer/polyvinyl chloride mixture at a temperature of or above the glass transition temperature of the polyvinyl chloride, the temperature of the mixture not exceeding 150°C, until the plasticizer has been incorporated substantially completely into the polyvinyl chloride, optionally feeding the solid constituent to the polyvinyl chloride mixed with the plasticizer in a section at which at least 80 wt% of the total amount of the plasticizer has been incorporated into the polyvinyl chloride, optionally devolatilizing and extruding the mixture through the extrusion die. 30 to 80 wt% of polyvinyl chloride, 0.5 - 5 wt% of a stabilizing additive, 0 - 40 wt% of a solid constituent, and 5 - 40 wt% of a plasticizer, liquid at room temperature, for the polyvinyl chloride, feeding polyvinyl chloride in uncompounded form into an extrusion apparatus having at least one rotor, which has at least three kneading and/or mixing zones and is capable of both transporting and mixing the mixture, feeding the polyvinyl chloride and stabilizing additive into the extrusion apparatus through a first inlet, which is disposed in the vicinity of the drive unit and adjacent to a first conveying segment section of the at least one rotor; feeding the plasticizer to the polyvinyl chloride mixed with the stabilizing additive through at least two inlets at a distance from one another, the plasticizer being added in at least two portions each of about 20-80 wt%, based on the total weight of the plasticizer, to the polyvinyl chloride, there being a kneading and/or mixing zone disposed between the addition of the individual portions, working the plasticizer/polyvinyl chloride mixture at a temperature of or above the glass transition temperature of the polyvinyl chloride, the temperature of the mixture not exceeding 150°C, until the plasticizer has been incorporated substantially completely into the polyvinyl chloride, optionally feeding the solid constituent to the polyvinyl chloride mixed with the plasticizer in a section at which at least 80 wt% of the total amount of the plasticizer has been incorporated into the polyvinyl chloride, optionally devolatilizing and extruding the mixture through the extrusion die.