@inproceedings{WiedlKarlingerSchemmeetal.2021, author = {Wiedl, Sebastian and Karlinger, Peter and Schemme, Michael and List, Manuela}, title = {Vergleich von unterschiedlichen Aufschmelzverfahren und die daraus resultierenden Eigenschaften f{\"u}r WPC-Spritzgussteile}, series = {Technomer 2021}, booktitle = {Technomer 2021}, publisher = {Technische Universit{\"a}t Chemnitz}, address = {Chemnitz}, isbn = {978-3-939382-15-7}, pages = {1 -- 13}, year = {2021}, abstract = {Leichtbau und ressourcenschonende Herstellungstechnologien sind zentrale Themen des 21. Jahrhunderts. Im Zuge dessen werden vermehrt Naturprodukte in der Kunststoffverarbeitung eingesetzt. Eine Sparte dabei bilden Holz-Polymer Werkstoffe (WPC), welche seit 2014 eine Verdoppelung in der Produktionsmenge erfahren haben. Dabei werden meist Holzpartikel statt Fasern als F{\"u}ll- und Verst{\"a}rkungsstoff eingesetzt. Der Vortrag befasst sich mit dem Vergleich von verschiedenen Aufbereitungsm{\"o}glichkeiten von WPCs mit Holzfaserverst{\"a}rkung hinsichtlich Mechanik und thermischer Sch{\"a}digung des temperaturempfindlichen Holzes. Teil der Untersuchung ist die einstufige Verarbeitung mittels eines Injection-Moulding-Compounders sowie die zweistufige Verarbeitung mittels Compounder und Heiz-K{\"u}hl-Mischer mit anschließendem Urformen an der Spritzgussmaschine.}, language = {de} } @article{WiedlKarlingerSchemmeetal.2022, author = {Wiedl, Sebastian and Karlinger, Peter and Schemme, Michael and List, Manuela and Ruckd{\"a}schel, Holger}, title = {Comparison of Melting Processes for WPC and the Resulting Differences in Thermal Damage, Emissions and Mechanics}, series = {Materials}, volume = {15}, journal = {Materials}, number = {9}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/ma15093393}, pages = {13}, year = {2022}, abstract = {The necessity for resource-efficient manufacturing technologies requires new developments within the field of plastic processing. Lightweight design using wood fibers as sustainable reinforcement for thermoplastics might be one solution. The processing of wood fibers requires special attention to the applied thermal load. Even at low processing temperatures, the influence of the dwell time, temperature and shear force is critical to ensure the structural integrity of fibers. Therefore, this article compares different compounding rates for polypropylene with wood fibers and highlights their effects on the olfactory, visual and mechanical properties of the injection-molded part. The study compares one-step processing, using an injection-molding compounder (IMC), with two-step processing, using a twin-scew-extruder (TSE), a heating/cooling mixer (HCM) and an internal mixer (IM) with subsequent injection molding. Although the highest fiber length was achieved by using the IMC, the best mechanical properties were achieved by the HCM and IM. The measured oxidation induction time and volatile organic compound content indicate that the lowest amount of thermal damage occurred when using the HCM and IM. The advantage of one-time melting was evened out by the dwell time. The reinforcement of thermoplastics by wood fibers depends more strongly on the structural integrity of the fibers compared to their length and homogeneity}, language = {en} } @misc{WiedlSehySchmidetal., author = {Wiedl, Sebastian and Sehy, Michaela and Schmid, Thomas and Bonauer, Markus and M{\"u}ller, Norbert and List, Manuela}, title = {Neue Wege f{\"u}r WPC: Altholz und klimaresiliente Laubholzarten als alternative Verst{\"a}rkungsstoffe}, series = {Technomer 2025}, journal = {Technomer 2025}, editor = {Seefried, Andreas and Stommel, Markus}, pages = {46 -- 46}, language = {en} }