Sustainable Converting
substrate, which as everyone knows is a real challenge in and of itself, and a big trend coming from the design agencies,” added Peter Kern, “but we have achieved remarkably good results there too. We saw that the GTT 2.0 simplifi es the printing process.” Marcus Graßler, sales representative Dunapack Packaging, said that the project print runs were in association with customer Milchwerke Berchtesgadener Land Chiemgau eG, which focuses on natural products and sustainable packaging. “The customer produces dairy and milk products, which are printed under cost pressure,” he said. “It’s important we conduct the project on repeated jobs so we can ensure we are tracking the same results against the same sample. While this means it can take time to complete a project, we want to be sure we compare like with like so that the results are robust, and we have tracked data across almost six months to ensure reliability.”
Better print quality, fewer press stops, better OEE
“The print runs were standardised using water-based inks and printing on both coated and uncoated papers,” Peter Kern said. “As soon as we could see that the print quality was at least the same or even better, the test became solely about the ink consumption. We have now carried out several tests and use the GTT 2.0 anilox rollers daily for a growing number of jobs on one of our presses. With it, we produce better quality, more smoothly, with fewer press stops and all while reducing our CO2 emissions.” Christian Rieger added that project data had been checked by Dunapack’s ESG specialist Sandra Frühwald and that he was looking to expand GTT use across the whole group. “This could theoretically lead to a reduction of as much as 40-70 tonnes of CO2 per site per year,” he said. Dunapack Group operates 18 sites across Europe. Stefan Schneider said that the unique design of the GTT engravings off ers other substantial operational benefi ts, including reduced maintenance and enhanced press uptime. “Printers have observed a notable decrease in the need for plate cleaning and maintenance, which results in more consistent print quality and longer uninterrupted runs for better productivity,” he said.
“While laying less ink down means using less materials, it also leads to a reduction in drying time, anywhere between 15 and 25 percent,” he said. “Optimising drying time delivers the added benefi t of using less power, which is clear to see in the bigger runs, but more diffi cult to prove. This will of course be a benefi t in ensuring compliance with upcoming ESG regulations regarding energy consumption.”
Stefan Schneider said the collaboration between Apex and Dunapack had taken a lot of hard work, but was paying dividend. “We are grateful to Christian Rieger and the whole Dunapack team for their dedication to this long-term project and for sharing the data with us,” he said. “We are thrilled by the successful results and look forward to working closely together to roll out a CO2 reduction program across other sites in the near future.”
42
Dec 2024 / Jan 2025
www.convertermag.com
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