Optimisations in the press section

The Koehler Group was founded in 1807 and has been family-run from the beginning until today. The group's core business is the development and production of high-quality speciality papers. These include thermal papers, playing card board, drink coasters, fine papers, carbonless papers, recycled papers, decor papers, groundwood board, sublimation papers and, since 2019, innovative speciality papers for the packaging industry. In Germany, the Koehler Group has five production sites with around 2,500 employees.

Koehler Kehl GmbH is part of the Koehler Group. At the Kehl site, four paper machines and three coating machines produce about 400,000t of paper per year, divided between thermal paper, decor, SD and flexible packaging.

Paper machine one was commissioned in 1990 and has a capacity of 120,000t/year with a working width of 420cm. The grammage produced is between 35g/m² and 100g/m² in the grades thermal, flexible packaging and carbonless paper.

The press section of a paper machine has a great influence on the runability and qualities of the paper to be produced. Poor water flow can lead to soiling and thus to runability problems. In addition, the surface or the transparency is significantly influenced if the water flow in the press is not optimally adjusted.

To optimise the water flow, concepts for different roller positions were developed and implemented in cooperation with the roller specialist MWN Niefern, and an IQ-Trim was installed for clean edge guiding. In close cooperation, customised solutions were developed that optimally serve the needs of the PM1.

Thanks to these measures, the cleaning intervals could be extended and the number of web breaks due to edge problems reduced.