Coated rolls are crucial for printing speed and quality. Whether flexography, gravure or offset: Regardless of the printing process, MITEX can support and realize process improvements through many years of experience with technical advice and high-performance coatings. Also in the printing industry there are many known challenges and problems which can be mitigated or eliminated by suitable roll coatings.
Below are examples of a few industry challenges with suggested solutions. For more information or a non-binding recommendation from our technicians for your application, please contact us directly.
Modern machines in illustration, decor and packaging printing are becoming faster and faster, while at the same time the demand for print image resolution is increasing and substrate quality is decreasing.
This stands in the way of sufficient emptying of the cells and leads to poor printing results.
By means of electrostatic charging, the ink in the cell is oriented towards the substrate. This leads to quantitatively better cell emptying and thus to higher print quality.
Due to charge separation between substrate and roll surface, high voltages can occur. The use of an electrostatic printing assist (ESA) can significantly increase this effect. One of the tasks of ESA coatings is to limit high voltages to a safe level and thus reduce the risk of fire. It is also advisable to check whether an ATEX-certified coating should be used in other comparable applications. MITEX's technical field service will be happy to provide non-binding advice in this regard.
With ATEX certified coatings, MITEX not only sets standards and underlines the high demand for safety and quality consistency, but also makes a consistent contribution to increasing the operational safety of customers. In this respect, MITEX supports mechanical engineering as well as manufacturers of electrostatic loading and unloading systems.
In the gravure printing unit, the high speed of the forme cylinder creates ink mist. This very fine ink mist is deposited on all surfaces. The rotating impression roller surface is particularly critical here. This can have a negative effect on the print image and damage the impression roller.
Format roll coatings can lead to uneven adhesive transfer. It is often necessary to "break in" a new size roll until a good process result is achieved. The reason for this is, on the one hand, an initially poor adhesive transfer and, on the other hand, the high running resistance of new coatings, which can drive machine drives to their performance limits. MITEX offers a specially developed coating that avoids these problems.
Modern production machines allow the manufacture of extremely thin films at ever higher production speeds.
Conventional, undercut lamella spreaders lead to local overstretching of the sensitive substrate, which can result in wrinkling during further processing.