Packaging supplier UPM Specialty Papers has collaborated with Bobst and Siegwerk to create opportunities for UPM’s packaging papers on standard flexographic printing machines.
During a joint project, the partners demonstrated that UPM’s packaging papers could be printed efficiently while achieving heat-sealability using flexographic techniques.
The initiative combined UPM’s papers with Siegwerk’s UniNATURE water-based ink series, as well as two heat-sealing lacquers from the CIRKIT coatings range.
The printing trials were conducted on the Bobst MASTER CI, a ten-color wide-web press optimized for water-based inks, achieving speeds up to 800 meters per minute.
The collaboration also investigated how various parameters influence print quality, with the tested resolutions and anilox configurations delivering high-resolution results across all four papers printed.
The project also delivered parameters on ways to improve flexible packaging papers with heat-sealing properties with flexographic printing.
UPM’s fibre-based packaging papers are designed for both food and non-food applications.
