The family-owned enterprise NETZSCH is composed of three highly specialized business units, these are Grinding and Dispersing, Pumps as well as Testing and Analyzing, and is a renowned manufacturer of top-quality products on the world market. Originally the company was founded in 1873 as sub-supplier to the ceramic industry. The w-hole group comprises a staff of about 2000 people worldwide, about WOO of them are based in Germany. The business unit Grinding and Dispersing comprises of the con- solidated companies NETZSCH-Feinmahltechnik GmbH for liquid and pasty productsand NETZSCH-CONDUX Mahltechnik GmbH for dry products. The business unit offers a comprehensive product range for all tasks arising in the procedural steps dispersing, de-aerating, wet and dry grinding as well as classifying. The company NETZSCH-Fein-mahltechnik GmbH defines itself as mechanical engineering company aiming at supplying special machines or complete systems to customers from the most different fields of applications. The machine equipment on offer enables the development of products on a laboratory scale just as well as the scale up to production size machines. The machines excel by their long lifetime and hereby guarantee a high reliability. For comminution processes down to the nanometer size range or for the dispersion of nano-sized particles the use of finer and finer grinding media is necessary. Furthermore for the avoidance of changes in the crystal structure of the product smooth conditions for "Mild Dispersion" processes are very important. With the new agitator bead mill developed by the NETZSCH-Feinmahltechnik GmbH a very good separation of grinding media with diameters down to 50 pm is possible even for low stirrer tip speeds. From experience we know that in particular nanotechnology applications often call for metal-free grinding or dispersion. For these applications we have developed a special grinding media separator system called ODC (Open Dynamic Classifier). The differences between real comminution, de-sagglomeration and disaggregation processes are discussed by the use of real experimental results. Furthermore the advantages of the innovative new screenless ODC-System will be explained.
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