TY - THES A1 - Zenger, Colin T1 - Evaluation of functional silphie paper in the disposal process N2 - The future of packaging seems to be in paper. Especially functional papers are on the rise of replacing plastic packaging more and more. The aim of the present work is to answer which disposal route is most suitable for functional silphie papers and how different coating techniques perform in a recyclability analysis. To answer this question, a laboratory experiment conducted in a paper laboratory in Lenningen, Germany tested how functional coating behaves in material recycling. Following the test method PTS-RH 021/2012 (Draft Ocober 2019), five functional paper samples and three reference samples with at least 35 % silphie content were defibered and new laboratory sheets were formed. For this, water-based coatings and extrusion coatings were used as coating techniques. Additionally, the rejects were separated in a screening step and evaluated. The laboratory trials reveal important trends:. First, it shows that extrusion coatings detach from the paper surface and were found in the reject, from which they can be energetically recovered. This leads to a high mass loss and therefore a low recyclability rate. Second, for water-based coatings, solubility is of great importance. Results demonstrate that with good solubility, these coatings can lead to low mass loss and high recycling quality. Subsequently, this results in high recyclability rates. However, in samples with a difficult to dissolve water based coating, stickies and inhomogenities remained in the paper. This can significantly impede the recycling process. Future research could investigate further technologies of functionalization of silphie paper, as well as broaden the discussion by including complete mass balancing without loss of fibers and process water analysis. With the results obtained, OutNature is advised to pursue the route of water-based coatings while maintaining watch-out of their dissolvability in the recycling process. Extrusion coated functionality is to be avoided currently as the loss of mass for recycling is hindering recyclability with the current definitions and analysis methods. At the same time, reevaluation should be done if major changes in legislation or focus of discussion are happening. KW - Recyclability KW - Functional paper KW - Silphie paper Y1 - 2022 ER -