Drying Process

Leister’s heat guns, air heaters, blowers, and infrared heaters are ideal for all kinds of drying processes. These devices are used in various drying applications.

Examples of drying applications can be seen in the manufacturing of paper, textiles, nonwoven material, metals, plastics, and glass components, in film packaging, and in other applications related to foodstuff such as roasting coffee or drying fruits and vegetables.

Drying in Processing

Users can vary the air distribution and flow rate according to the desired drying results. This involves adapting parameters, such as the temperature and air volume, and utilizing different nozzles.


Drying with hot air causes two physical effects to occur at the same time. Together, they further increase the efficiency of the drying process. Firstly, hot air can hold considerably more moisture than cold air. Secondly, the continuous current of air that passes over the wet surface increases the rate of evaporation, particularly if fresh, dry air is always used.
To make the drying process even more efficient, hot air is often used to blow off any stray drops of moisture on the surface before drying begins. Leister has a solution for this too, offering a blow-off nozzle specially developed for this purpose and the powerful AIRPACK blower.

Drying with Infrared


Just like the sun, the drying effect of infrared heaters is caused by infrared rays. Thanks to direct heat transfer, drying paint and dye on metal, plastics, wood, and textiles is an immediate and dust-free process. Infrared heaters are used in the textiles industry, in fabrication prosesses of nonwoven and other fabric materials as well as in paper manufacturing and in printing machines. 
The medium infrared radiation from Leister infrared heaters is also effectively absorbed by water. In doing so, the infrared heating directly heats the water, making the drying process even more efficient.

Drying with a Heat Gun

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With their broad range of application, heat guns are used for drying processes not only in automobile manufacturing assembly plants, where, for example, scratches in the paintwork are repaired and quickly dried with hot air, but also in craft businesses or by hobby crafters in their home workshops. Leister and Weldy’s heat guns can be used for any application where hot air is needed.