Valmet commissioned new OptiCoat Layer curtain coater with supply system and a new OptiCoat blade coater at board machine 3 (BM 3) at Mayr-Melnhof's facility in Kolicevo, Slovenia.
The OptiCoat Layer is a multilayer curtain coater that uses slide dye curtain coating to apply extremely thin or thick and uniform layers simultaneously all within one coating station.
This compact system is suitable for both board and paper machines with all speeds and widths. Its supply system includes the necessary equipment to provide degassing, which is essential in curtain coating as even the smallest air bubbles affect the stability of the curtain.
Valmet’s OptiCoat blade coater comes with an application roll. It transfers coating color from the color pan which is then applied onto the web surface with an applicator roll.
The machines have been put into operation following the pre-assembly and pre-testing at the facility.
Mayr-Melnhof Kolicevo production manager Aljaz Hafner said: "2-layer coating has been tested with dry edges, and equipment works as expected. It has proven to be very good that we chose the degassing system from Valmet. We are very pleased with it."
The Kolicevo mill produces recycling and virgin fiber based cartonboard grades with weights ranging from 200 and 500 g / m². These products are used for food packaging, cosmetics, pharmaceutical packaging and other high-quality applications.
Mayr-Melnhof operates through two operative segments including MM Karton and MM Packaging.
MM Karton has seven mills across Europe, where it produces more than 1.6 million tons of virgin fiber based board every year.
Image: Valmet OptiCoat Layer curtain coater. Photo: courtesy of Valmet.