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Issue 01/2015

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Automotive have been

Automotive have been investigated (5 mm, 6 mm, and 10 mm) with two layers flax/PFA skin on each side at the core. The bending properties have been determined using a 4-point bending test according to DIN 53393, which provides pure bending loads in the sandwich component between the two points of load and a constant bending moment. The thereby determined effective bending stiffness is shown in Fig. 4. It can be observed that the cork core has a major impact on the stiffness of the sandwich material, which increases with increasing core thickness. By using 5 and 6 mm cork core the stiffness can be increased by more than 100 %. The stiffness for 10 mm core sandwich is approx. 800 % higher than the stiffness of the reference material. The results lead to the conclusion that a certain thickness is necessary to gain an advantage by using cork as core material. Burning Behaviour In order to further investigate the usability of bio-sandwiches in different applications, burning tests were carried out to determine the flammability. According to DIN 75200 or the Federal Motor Vehicle Safety Standard 302 (FMVSS 302), the sandwich and reference samples were tested in a special combustion chamber. The test gas was an ethane/methane gaseous mixture with a calorific value of 38 MJ/m 3 . The tests showed that no specimen combusted. Even after a flame exposure period of 300 seconds no flame propagation could be determined. A slight glowing was detected for a few magnetic_148,5x105.ai 175.00 lpi 15.00° 75.00° 0.00° 45.00° 14.03.2009 10:13:31 Prozess CyanProzess MagentaProzess GelbProzess Schwarz Magnetic www.plasticker.com for Plastics • International Trade in Raw Materials, Machinery & Products Free of Charge • Daily News from the Industrial Sector and the Plastics Markets • Current Market Prices for Plastics. • Buyer’s Guide for Plastics & Additives, Machinery & Equipment, Subcontractors and Services. • Job Market for Specialists and Executive Staff in the Plastics Industry Fig. 5: Bio-sandwich sample after a flame exposure period of 300 s seconds before the sample extinguished. Fig. 5 exemplarily shows a specimen after a flame exposure of 300 seconds. Conclusion The results of this study support the idea that biocomposites such as natural fibre reinforced (bio-) polymers and bio-sandwiches are suitable for the use in high-performance applications. By optimising the press process and using aligned fibres instead of conventional natural fibre non-woven materials, the mechanical performance could be increased many times over the performance of standard natural fibre materials. Moreover, the biobased, non-hazardous PFA resin is a byproduct of the sugar industry. It has a very low ecological impact, and very good mechanical and flame performance. In addition, the production of a bio-sandwich material by using cork composite as core material provides a variety of applications not only in the automotive industry but also in new application fields like the building sector or furniture industry. Acknowledgment: The research leading to these results has received funding from the European Community’s Seventh Framework Programme (PF7) under grant agreement n° 285689 (BioBuild – High Performance, Economical and Sustainable Biocomposite Building Materials). Literature [1] Müssig, J.; Carus, M.: Bio-Polymerwerkstoffe sowie holz- und naturfaserver-stärkte Kunststoffe. In: Marktanalyse Nachwachsende Rohstoffe Teil II, Fach-agentur Nachwachsende Rohstoffe e.V., Gülzow, 2007. [2] Zeitsch, K.J.: The chemistry and technology of furfural and its many by-products. Elsevier, 2000. [3] Carus, M.: Naturfaserverstärkte Kunststoffe im Automobilbau: Märkte, Leichtbau und Nachhaltigkeit. In: 1. AVK-Fachtagung „Naturfaserverstärkte Kunststoffe“, Germany, Kaiserslautern, 4.11.2014. [4] Dittenber, D.B.; Ganga Rao, H.V.S.: Critical Review of Recent Publications on Use of Natural Composites in Infrastructure. In: Composites Part A, Vol. 43, no. 8 (2011), pp. 1419-1429 www.ivw.uni-kl.de Up-to-date • Fast • Professional 18 bioplastics MAGAZINE [01/15] Vol. 10

Internationaler Kongress Kunststoffe im Automobilbau und Fachausstellung mit Simultanübersetzung Deutsch / Englisch TOP-THEMEN DES KONGRESSES • Additive Fertigung von Serienwerkzeugen und Kunststoffbauteilen mittels 3D Printing • Kunststoffkomponenten für Matrix LEDund Laser-Scheinwerfer • CFK Klebetechnologie für die automobile Serienproduktion • für den Einsatz im Automobil Interieur • Potentiale des sequenziellen Preformings hinsichtlich Leichtbau und Automatisierung • Entwicklung duroplastischer langfaser ver - • Leichtbau für Nutzfahrzeuge • Die Bedeutung von Kunststoffen für das Fahrerhaus 2025 JETZT ANMELDEN! www.kunststoffe-im-auto.de IHR TAGUNGSLEITER Prof. Dr. Rudolf C. Stauber Fraunhofer Project Group Materials Recycling and Resource Strategies Veranstaltung der VDI Wissensforum GmbH | www.kunststoffe-im-auto.de |

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