Paint & Coatings Industry - March 2008 - (Page 68)

For as long as man has attempted to mix solids with liquids, he has struggled to avoid an annoying, if not wholly unacceptable, byproduct – lumps or, more scientifically, agglomerates. In the case of a single serving of a food product, as in your morning coffee when you add powdered creamer, these agglomerates may be easily ignored. In the case of a large batch of highvalue product, such as inks, coatings or fumed silica slurries, agglomerates can render the product useless, or greatly increase production time by creating the need for a grinding or pulverization process. 68 Shear-Free for Automated tarting with the fundamental idea of wetting finely dispersed powder in a large liquid surface, the Ψ-MIX® (Psi-MIX) inline disperser was developed by NETZSCH Feinmahltechnik GmbH. Effective wetting of solid particles by high-quality dispersion improves quality and enables operation of the machine at high production rates. The Ψ-MIX combines a new dispersion method with an emission-free inline process. The solid components are dispersed on a large liquid surface created by a highsuspension flow through the narrow process zone. Since the new machine is capable of processing both low- and high-viscosity suspensions, the entire application range of dispersion technology is covered. Applications for temperature-sensitive or shearthickening materials are easily achieved within the design of the process chamber. Compared to conventional rotor-stator systems, this machine uses significantly less energy for dispersion. Temperature-sensitive products and materials with a broad viscosity range can be processed. The Ψ-MIX can be integrated into automated plants that process large batches. It is also suited for emission-free and explosion-proof operations (Figure 1). The design of the machine is distinguished by the fact that foreign bodies in the pigment suspension do not cause damage to the system. The deaeration function occurs automatically within the operating method, which helps to process waterborne suspensions. For batch sizes from 15 L to 700 L of suspension, the pilot plant and small batch version MICRO Ψ-MIX® (Figure 2) was recently developed. With this machine Figure 1 | The Ψ-MIX integrated into automated plants for processing large batches. S Figure 2 | The MICRO Ψ-MIX for pilot and small batches. By Peter Schertenleib | NETZSCH-Feinmahltechnik GmbH, Selb, Germany MARCH 2008 | W W W . P C I M A G . C O M http://WWW.PCIMAG.COM

Table of Contents Feed for the Digital Edition of Paint & Coatings Industry - March 2008

Viewpoint Industry News Calendar of Events Company News Mergers and Acquisitions Names in the News Marketplace Quarterly Stock Watch Reaching Strict VOC Requirements With Outstanding Durability for Industrial Maintenance and Marine Coatings A Unique Fungicide for Wood-Filled Plastic deSigns of the Times: Slacking Off! From Rocks to Nanos Shear-Free Dispersion Process Fluorinated Oxetane Oligomers as Versatile Intermediates for Polymer Modification The Effects of TPO Composition on Adhesion and Proposed Chemical Mechanism Supplier Showcase Color Management Materials Watch Products Classifieds Advertiser Index

Paint & Coatings Industry - March 2008

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