Injection Molding of Wood-Filled Thermoplastic Polyurethane

E. Moritzer, M. Richters, Journal of Composites Science 5 (2021).

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Journal Article | Published | English
Author
Moritzer, Elmar; Richters, Maximilian
Abstract
<jats:p>Wood fiber reinforcement of plastics is almost limited to polypropylene, polyethylene, polyvinyl chloride and polystyrene. Wood fiber reinforcement of thermoplastic polyurethanes (TPU) is a new research field and paltry studied scientifically. Wood fiber reinforcement can carry out synergistic effects between sustainability, material or product price reduction, improved mechanical properties at high elongation, and brilliant appearance and haptics. In order to evaluate to what extent the improvement of mechanical properties depend on material-specific parameters (fiber type, fiber content) and on process-specific parameters (holding pressure, temperature control and injection speed), differently filled compounds were injection molded according to a partial factorial test plan and subjected to characterizing test procedures (tensile test, Shore hardness and notched impact test). Tensile strength showed significant dependence on barrel temperature, fiber type and interaction between holding pressure and barrel temperature in the region of interest. Young’s modulus can be influenced by fiber content but not by fiber type. Notched impact strength showed a significant influence of cylinder temperature, fiber content, fiber type and the interaction between cylinder temperature and fiber content in the region of interest. Shore hardness is related to fiber content and the interaction between mold temperature and injection flow rate. Our results show not only that wood-filled TPU can be processed very well by injection molding, but also that the mechanical properties depend significantly on temperature control in the injection-molding process. Moreover, considering the significant reinforcing effect of the wood fibers, a good fiber-matrix adhesion can be assumed.</jats:p>
Publishing Year
Journal Title
Journal of Composites Science
Volume
5
Issue
12
Article Number
316
ISSN
LibreCat-ID

Cite this

Moritzer E, Richters M. Injection Molding of Wood-Filled Thermoplastic Polyurethane. Journal of Composites Science. 2021;5(12). doi:10.3390/jcs5120316
Moritzer, E., & Richters, M. (2021). Injection Molding of Wood-Filled Thermoplastic Polyurethane. Journal of Composites Science, 5(12), Article 316. https://doi.org/10.3390/jcs5120316
@article{Moritzer_Richters_2021, title={Injection Molding of Wood-Filled Thermoplastic Polyurethane}, volume={5}, DOI={10.3390/jcs5120316}, number={12316}, journal={Journal of Composites Science}, publisher={MDPI AG}, author={Moritzer, Elmar and Richters, Maximilian}, year={2021} }
Moritzer, Elmar, and Maximilian Richters. “Injection Molding of Wood-Filled Thermoplastic Polyurethane.” Journal of Composites Science 5, no. 12 (2021). https://doi.org/10.3390/jcs5120316.
E. Moritzer and M. Richters, “Injection Molding of Wood-Filled Thermoplastic Polyurethane,” Journal of Composites Science, vol. 5, no. 12, Art. no. 316, 2021, doi: 10.3390/jcs5120316.
Moritzer, Elmar, and Maximilian Richters. “Injection Molding of Wood-Filled Thermoplastic Polyurethane.” Journal of Composites Science, vol. 5, no. 12, 316, MDPI AG, 2021, doi:10.3390/jcs5120316.

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