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New Approach for the Efficient Attainment of Flame Retardancy Using Multi Component Injection Molding

: Schneider, Dorothea; Hübner, Christof; Bourbigot, Serge

Fulltext urn:nbn:de:0011-n-5374697 (844 KByte PDF)
MD5 Fingerprint: 0e3610c5bbcdd6a2e422db5a77cd4685
Copyright AIP
Created on: 3.1.2020

Wagenknecht, U.:
Europe/Africa Conference Dresden 2017 - Polymer Processing Society PPS. Proceedings : 27-29 June 2017, Dresden, Germany
Melville/NY: AIP Publishing, 2019 (AIP Conference Proceedings 2055)
ISBN: 978-0-7354-1783-0
Art. 070007, 7 pp.
Polymer Processing Society (PPS Europe/Africa Conference) <2017, Dresden>
Conference Paper, Electronic Publication
Fraunhofer ICT ()

The injection molding process yields many possibilities to create innovative plastic part solutions. Based on extensive research in distinct subject areas and the cross-disciplinary interconnection between different academic disciplines lately an interesting new approach for the efficient and effective attainment of flame retardancy could be identified: Multi component injection molding, where two or more plastic melts are injected next to or within each other during one cycle, can be used to produce innovative flame retardant plastic parts. These parts have an optimized skin/core structure with the core part consisting of the pristine polymer while the flame retardant polymer system is located in the skin. Such a structure proves to be ideal, because it allows for a faster protection dynamic. This broadening of the field of application of standard injection molding machines is made possible by the use of intermediate plates with individually suitable modular techno-logical inserts. The modular inserts required for this kind of application comprise hot runners including shut off and control functions to separate and join melt flows from different injection units into one cavity. These modules make for the combination of the sequential and simultaneous injection of melts. In that account first trials which prove the concept to be viable have been conducted. Promising results will be shown as well as the principles of laboratory and industrial scale implementation of the underlying production process, while further research still is ongoing. In conclusion the paper will point out the advantages, possibilities and application potential given by this new approach. Cost savings will be given by the super-session of costly special machinery as well as achieved material savings and increased part quality and process stability.