Präsentationen Stakeholder Workshop “Innovative Bastfaseranwendungen für die Industrie”
Fraunhofer Institut LBF (Dr. Roland Klein, Projektleiter) – Vorstellung des DuroBast Projektes
Fachagentur Nachwachsende Rohstoffe (Robert Hardt) – Forschung und Entwicklung mit Naturfasern in Deutschland
Fraunhofer Institut LBF (Lais Weber) – Innovative Faserhydrophobierungsverfahren für Naturfasern
Institut für Textiltechnik (ITA) der RWTH Aachen (Leonie Wesener und Amanda Kulessa) – Feine Hybridgarne aus non-woven Naturfasern und deren Verarbeitung zu Textilen-Flächen
Leibniz Institut für Verbundwerkstoffe (IVW) (Maximilian Salmins) – Herstellung von Organoblechen mit Recycling-PLA
Lehrstuhl für Werkstoffprüftechnik (WPT) der Technischen Universität Dortmund (Ramon Helwing) – Neue Erkenntnisse zum Versagensverhalten Naturfaserverstärkter Kunststoffe mit Maßgeschneiderten Testmethoden
nova-Institut (Olaf Porc) – Techno-Ökonomische Betrachtung von Naturfaseranwendungen
Silbaerg (Dr. Jörg Kaufmann) – Naturfaser-Endanwendungen im Bereich Snow-Boards und Sport-Equipment
Challenges in Manufacturing of Hemp Fiber-Reinforced Organo Sheets with a Recycled PLA Matrix
Maximilian Salmins; Florian Gortner; Peter Mitschang: published in Polymers Vol. 15, Issue 22, DOI: https://doi.org/10.3390/polym15224357
Abstract
This study investigates the influence of a hot press process on the properties of hemp fiber-reinforced organo sheets. Plain-woven fabric made from hemp staple fiber yarns is used as textile reinforcement, together with a recycled poly-lactic acid (PLA) matrix. Process pressure and temperature are considered with three factor levels for each parameter. The parameter influence is examined based on the B-factor model, which considers the temperature-dependent viscosity of the polymer, as well as the process pressure for the calculation of a dimensionless value. Increasing these parameters theoretically promotes improvements in impregnation. This study found that the considered recycled polymer only allows a narrow corridor to achieve adequate impregnation quality alongside optimal bending properties. Temperatures below 170 °C impede impregnation due to the high melt viscosity, while temperature increases to 185 °C show the first signs of thermal degradation, with reduced bending modulus and strength. A comparison with hemp fiber-reinforced virgin polypropylene, manufactured with identical process parameters, showed that this reduction can be mainly attributed to polymer degradation rather than reduction in fiber properties. The process pressure should be at least 1.5 MPa to allow for sufficient compaction of the textile stack, thus reducing theoretical pore volume content to a minimum.
Poster: Press and Joining Technologies – Challenges in Manufacturing of Hemp Fiber-Reinforced Organo Sheets with a Recycled PLA Matrix
Durable and resource-saving composite structural components based on newly pre-treated and processed native bast fibres
