Our partner PR Pulping OY will be presenting its new method for processing packaging board for liquids at the renowned International Munich Paper Symposium (IMPS) – 25 - 27 March 2025.

The presentation will introduce new developments aimed at simplifying processes and eliminating the need for many traditional process units in recycled fibre lines - such as secondary pulpers, coarse screening, HC cleaners and reject drums. This is associated with a reduction in total investment, reduced energy consumption, lower operating costs, and lower climate emissions with a higher fibre yield.

Recycled paper contains various foreign components or rejects that must be removed from the fibre suspension. Hard and heavy particles lead to the wear of the process equipment and the most economical method is to remove these components as early as possible in the process. Lighter components such as plastics tend to rotate above the swirl generated by the rotor; they must be removed continuously. Traditionally, several sorting units are needed to remove all these different rejects, but there is a simpler way.

As a rule, recycled paper contains materials that are easy and difficult to dissolve. The dissolution time for the material with higher wet strength is often too short, so that this fibre-containing material ends up as reject. The newly developed process makes it possible to extend the pulping time of fibres that are difficult to dissolve or separate - including wet-strength papers - while the energy consumption is lower than usual in practice.

The new developments presented here are the result of many years of research and development work. They make it possible to improve the efficiency of existing pulpers and to set up new recycled fibre lines in which the coarse sorting of the fibre suspension already takes place within the pulper.

More information:
www.paper-online.de