The production of coated paper or coated board requires contactless drying of the coating which is applied until it is suffiently dry to touch guiding rolls or drying cylinders. This is done either in Offline Coating Machine or in Online coating sections.
Our drying solutions are customized to your specific process needs and available energy sources, including the use of
The most common layout is to start with infrared drying after the coat application, immediately followed by air dryers. The combination of infrared drying and air drying provides a perfect combination of available technologies to optimize your drying system for optimal quality and energy efficiency.
For most graphical coatings, it is crucial to start the drying with a high drying rate to reduce risk of binder migration and mottling, while controlling the temperature and avoiding overdrying or overheating the coating components. We have a long experience in designing coat drying in such a way that the coated board or paper surface keeps optimal print quality when used by your customers.
Concept for optimal coat drying with 3 high efficiency products: high performance gas IR emitters GemE (1), integrated air drying with UniDryer® (2) concept and ERS (3) : exhaust air from IR is used as energy source in Air Dryer.
For specialty coatings and barrier applications, the combination of infrared and air drying within the same dryer, allows for optimal temperature control along the drying to ensure the delicate surface coating remains perfectly stable without risk of blistering or other coating defects linked to wrong drying strategy.
We supply every non-contact drying equipment which is required in your coating process, including the web cooler if paper or board temperature needs to be reduced before winding it on the pope.
Whether your project is a new investment, an upgrade or a rebuild, we can offer a solution which considers the total drying strategy, including the simulation of the cylinder drying and optimizes your overall coating operations.
Our products are designed for optimal energy efficiency, high reliability, long lifetime and flexibility.
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Well suited for single side drying of paper & board grades above 130 g/m², UniDryer® provides a perfect combination of high intensity gas IR and air drying with the same dryer. When combined with an efficient air dryer to finish the drying and our ERS (Energy Recovery System) solution, energy savings of up to 50 % can be reached compared to traditional dryers. We have examples of such upgrades where the initial investment was paid back within a very short time (1 to 2 years).
In order to achieve the required high drying intensity immediately after the coater, the GemDryer® is installed less than 2 m from the coating head. This limits binder migration and starts an intensive heating and drying of the coating layer.
This picture shows a DryMaster™ immediately after the coating head with TempArray™ temperature control.
The temperature measurement is used to provide direct feedback and adjust the local drying power in zones of 37,5 to 75 mm. This allows for adjusted drying rate in function of local cross-direction differences in coat application.
Imperfections in coating application can be compensated by adjusting the local drying rate and product quality deviations can be avoided by this advanced drying control.
