Novel Hybrid PETG Composites for 3D Printing
, Jana Kozakovičová 1, Michal Procházka 1, Ivica Janigová 1, Marek Vysopal 2, Ivona Černičková 3, Jozef Krajčovič 3 and Zdenko Špitalský 1,*Round 1
Reviewer 1 Report
The subject of the work is very interesting and current. The tests were carried out properly. Tests were carried out for the materials themselves only after their manufacture. For users of 3D printing, the results of tests for received materials in the form of printouts will be more interesting. Known materials used for filament before printing have different properties and after printing different. In my opinion, the work should be supplemented with the results of tests of the developed materials, but in the form of printed objects (e.g. standardized samples for strength tests)
Author Response
Thank you for careful reading. The reviewer requested us to the results of tests of the developed materials but in the form of printed objects (e.g., standardized samples for strength tests). It is a perfect note. Unfortunately, due to the coronavirus restriction, we cannot perform supposed mechanical tests. Therefore we added Figure 4C and a short paragraph with an explanation about real printouts from the commercial filament and presented filament. I hope this will satisfy the request as an alternative to the mechanical test.
Reviewer 2 Report
The manuscript entitled " Novel hybrid PETG composites for 3D printing" by Mária Kováčová et al is about structure and mechanical properties of PETG composites for filament production. This is a well written manuscript. The text is written clearly. Authorsprovided valuable results in this field.
The main strength of the article is a comparison of the mechanical properties of composites with different fillers. What is especially important from a practical point of view, recommendations are given on the choice of filler with the least effect on the surface roughness of the filament. This is an important conclusion, therefore, a description should be given of the 3D printing mode (temperature, printing speed, layer thickness, nozzle diameter) of the test products shown in Figure 4. This information will be interesting to both academic and industrial readers of the Journal
Author Response
Thank you for very carefull reading. According the request of reviewer 2 we added chapter "2.10. 3D printing" to section 2. Materials and Methods.
