At K 2019, Windmoeller & Hoelscher, a specialist for extrusion, printing and converting machines in the flexible packaging market, presented new developments in three areas: efficient production, sustainable packaging and Packaging 4.0.
Customers attended print demonstrations with the newly introduced flexographic printing press, NOVOFLEX II, at the new Technical Center at Lengerich. The NOVOFLEX II is W&H’s press for maximum productivity through high performance and fast job changes and a speed of up to 800 m/min.
“With a completely new design of the print deck with a very stiff arrangement of rollers and impression cylinder, we have reduced vibrations and related issues to a new market standard. This enables top quality print results at very high speeds even with critical vibration inducing images,” explained Hermann Veismann, general manager – Business Unit Printing and Finishing, W&H. He continued, “In return, the flexo plates must have exceptional ink transfer capabilities to keep up with the improved design.”
“We immediately realized that the quality requirements of W&H are one of the most demanding in the market,” added Dr Uwe Stebani, general manager, Xeikon Prepress. “We started with a joint project team of Flint Group Flexographic and Xeikon Prepress, and really could drive the print quality to a new level for digital flexo plates. Our system solution comprising ThermoFlexX imagers with the breakthrough Woodpecker Nano surface screening technology in combination with the nyloflex NEF plates and UV LED exposure met the expectations of W&H and, thus, nicely contributed to the overwhelming success of the print demonstrations.”
Friedrich von Rechteren, global commercial vice president of Flint Group Flexographic, added, “It is impressive to see that W&H confirmed our quality aim for superior results on a state-of-the-art high speed flexible printing press. With our new flexographic system for solvent plate processing, customers can achieve a new quality level in flexible packaging produced with an open plate processing system. Similar qualities could only be achieved with closed systems available in the market until now. Woodpecker Nano in combination with Flint Group Flexographic plates, provide significant benefits to our customers with regard to cost and quality and representing a milestone in flexible packaging printing.”
The nyloflex NEF plate is a high durometer plate for flexible packaging and labels and is specially developed for creation of flat top dots as well as reproduction of surface screening. The combination of UV LEDs and UV tubes allow the definition of various dot shapes and shoulder angles or relief elements. The Woodpecker Nano software enables the output of surface micro structures at imager level, and thus, avoiding the need for costly RIP options. Woodpecker Nano surface screens are perfectly symmetrical and the finest available for LAMs layer digital flexographic plates.
Running the NOVOFLEX II flexographic printing press with a speed of 600 m/min, W&H demonstrated the efficient production of a food style print design ‘Tortillas’ with a unique print quality, high productivity and, consequently, lower total cost of print.