HANNOVER MESSE 2019, 01 - 05 April
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Drying in defined conditions

New dryer system enables product development in laboratories.

Logo Karlsruher Institut für Technologie


Karlsruher Institut für Technologie

Exhibitor details
Exhibitor details
Logo Drying in defined conditions

Product description

Many coated products, such as batteries, light-emitting diodes or corrosion protection paint, are made through liquid-phase application. Here, a carrier is coated with a thin film of liquid material that is dried. Developing these coating materials and the corresponding production process requires extensive laboratory tests in the preliminary stages. In this phase, the product characteristics crucially depend on the drying parameters. If the laboratory environment is not accurately defined and does not correspond to the production conditions later on, the transition from the pilot scale to production cannot succeed. Rather, no consistent quality of the functional layers can be guaranteed. KIT scientists of the working group Thin Film Technology have developed a drying system defining the liquid processing and quantifying of thin layers. The centrepiece of the newly developed Comb Nozzle Dryer is the geometry of the nozzle field, which is integrated in hood dryer that encloses it. The nozzle field consists of regularly distributed, hexagonal vertical stream nozzles that spray air or nitrogen onto the surface to be dried. Each nozzle is surrounded by a ring of effusion openings via which surplus fluid is sucked off. The special form of the nozzles ensures an area-homogenous heat and mass transfer and enables an accurate setting of the mean heat and mass transfer coefficients via the nozzle discharge speed and the distance between the hood dryer and the film to be dried. The Comb Nozzle technology is suitable for drying thin layers or coatings on substrates with large surfaces that are required for sensitive components. Drying conditions can thus be set that are comparable to industrial production. This allows simple upscaling from the laboratory to the pilot scale and then on to production. The technology is applicable both in stationary and in continuous processes. KIT developed the drying system and is now looking for partners for industrial application.

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Hall 2, Stand B16

(Main stand)

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