Enameling Technology
There are both manual and automatic coating processes. Conventionally used to coat the surfaces of articles - depending on unit numbers required and the proposed application - are spray and immersion techniques. The main environmental problems associated with these processes arise from the emission of volatile organic compounds (VOCs), the energy consumption in production plant, and the coating material waste products.
In recent years, the use of environmentally friendly products, such as water-based coating systems, has markedly increased. Unfortunately, in certain applications, including metal band coating, it is not yet possible to dispense with the use of solvent-based coating systems. The consumption of coating materials in these applications can be reduced by means of the use of optimised coating techniques and the application of particularly thin layers of coating. VOC emission is also reduced by enclosing the coating machines and transferring the exhaust fumes containing the VOCs to thermal waste gas processing units.
The use of dry powder coating materials and the corresponding coating techniques represent a far-reaching ecological improvement. The fundamental research that has been conducted in Germany has resulted in concepts for coating applications and recycling that have allowed the establishment of environmentally-friendly coating techniques in commercial applications.
The research papers and best practice examples available on this internet platform provide further information on ecologically-sound coating and application systems, including:
• the use of solvent-free, water-based coating systems and the full recycling of the coating overspray (spray sludge) in single colour tone applications.
• the development of natural colorants with optimal toxicological, ecological and technological profiles.
• the use of powder coatings for sheet metal, cast and welded items and articles made of wood.
Construction of a conditioning plant (drying) of 2K lacquer coagulants to be used as high quality filler
Development and testing of a model consultancy concept in support of technology transfer in small and medium-sized enterprises, with a view to promoting the introduction of environmentally friendly coating systems
Development of a clear powder coating, together with technology for the production and application of this coating in accordance with the requirements of the automobile industry