The invention relates to a method for producing a component part having a wall thickness of at most 3 mm on at least one part of the component part, comprising the method step of injection molding by means of an injection mold in an injection molding machine using a polymer/boron nitride compound, wherein the polymer/boron nitride compound comprises a thermoplastically processable polymer material and a heat-conducting filler, wherein the filler comprises platelet-shaped hexagonal boron nitride particles and wherein the injection rate during injection-molding is at most 200 mm/s. The invention further relates to a component part produced using such a method and a polymer/boron nitride compound for producing such a component part. The invention further relates to the use of such a component part for heat dissipation of component parts and assemblies to be cooled.