Static mixing element, single stage static mixing element segment, static mixer, mixing vanes element and method for mixing very viscous polyurethane with a curing accelerating agent

摘要

The present invention concerns a static mixing element (1) having a mixing channel (2) of substantially tubular shape which is undivided in axial direction and swirl vanes (4a, 4A, 4b, 4B) which are arranged beside each other and axially one after another in said mixing channel (2) and which radially abut on the inner wall of said mixing channel (2) and are, in this area, interconnected with said inner wall. Even in case of mixing very viscous components resp. mixing components at high flow rates, in which cases the forces applied by the flowing components to the swirl vanes (4a, 4A, 4b, 4B) are quite huge, the correct axial position of the swirl vanes, in particular in the entry area of the mixing element (1), can be assured. Especially for long mixing elements (1), this leads, under the before mentioned conditions, to a considerable improvement in mixing quality.