Influence of filler types onto the viscosity of highly filled polymers.

Christian Kukla, Lidija Slemenik Perše, Marko Bek, Joamin Gonzalez-Gutierrez, Clemens Holzer

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In Powder Injection Molding (PIM) and Fused Filament Fabrication (FFF) of ceramic and metallic components, thermoplastic polymer compounds are highly-filled with powder of the final material. These feedstocks are used to produce green parts. Later on, the polymeric components are removed in the debinding step and the final components are obtained by sintering. The rheological behavior of these feedstocks is critical for the shaping process and the final properties of the components. The flow behavior of the feedstocks is very sensitive to the amount of fillers in the liquid polymer, the particle size distribution and shape, the nature of the filler and the polymer matrix, and the use of coupling agents or compatibilisers. Several investigations on the influence of the particle size distribution and shape can be found. Here the nature of the filler is also investigated. Thus, three different types of particles were used: steel, aluminium and titanium. Comparable particle size distribution and shape were selected for the different fillers. The different fillers were compounded with a polymer/wax binder system with three different powder loadings. The plate-plate rheological measurements were done and significant differences were observed between the different compounds.
Original languageEnglish
Title of host publicationInternational Conference on Polymers and Moulds Innovations
Subtitle of host publicationConference Proceedings
EditorsAntonio Pontes
Place of PublicationGuimaraes, Portugal
PublisherInstitute of Polymers and Composites, University of Minho, Portugal
Number of pages6
ISBN (Electronic)978-989-20-8809-9
Publication statusPublished - 19 Sept 2018
EventInternational Conference on Polymers and Moulds Innovations - PMI2018: International Conference on Polymers and Moulds Innovations - University of Minho, Guimaraes, Portugal
Duration: 19 Sept 201821 Sept 2018


ConferenceInternational Conference on Polymers and Moulds Innovations - PMI2018
Abbreviated titlePMI2018
Internet address


  • Rheological properties
  • highly filled polymer

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