**4. Conclusions**

The conducted research results allowed us to determine the bending strength of polyamide-based materials, taking into account the influence of additives in the form of carbon fibers and glass microbeads compared to the pure, base material. The analysis of the research results enables the formulation of the following conclusions:


carbon fibers negatively affected the quality of the connection between successively deposited layers.


In future research, the authors will try to reduce the presence of voids in the additively manufactured PA-based materials by means of heat treatment in vacuum conditions. A positive result of such postprocessing would be examined from the point of view of mechanical properties.

**Author Contributions:** Conceptualization, J.K. and M.M. (Michał Mazurkiewicz); methodology, J.K., M.M. (Michał Mazurkiewicz), J.Ł., K.J., I.S. and J.T.; software, M.M. (Marcin Małek); validation, I.S. and K.G.; formal analysis, J.K. and L.S.; investigation, M.M. (Michał Mazurkiewicz), J.K., J.Ł., ´ I.S. and J.T.; resources, J.K., M.M. (Michał Mazurkiewicz) and K.G.; data curation, I.S., J.Ł., M.M. (Michał Mazurkiewicz), M.M. (Marcin Małek), K.J. and B.S.; writing—original draft preparation, M.M. (Michał Mazurkiewicz), K.J., B.S., J.K. and J.Ł.; writing—review and editing, J.K. and M.M. (Marcin Małek); visualization, J.K., I.S. and J.Ł.; supervision, J.K.; project administration, J.K.; funding acquisition, J.K. and L.S. All authors have read and agreed to the published version of the manuscript. ´

**Funding:** This research was funded by the Military University of Technology, gran<sup>t</sup> number: 22-757/2022.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
