Mechanical Properties of PETG Parts Produced by the FFF Method with Different Infill Geometries

Abstract:

Additive technology (3D printing) is a method of manufacturing plastics that allows you to create sophisticated shaped parts at relatively low costs and in a short time. This method is particularly useful for rapid manufacturing, including engineering applications such as rapid prototyping. The most common commercially used Fused Filament Fabrication (FFF) method consists in dispensing the filament from a heated nozzle located in three moving axes, which solidifies after exiting the nozzle. This technology has gained significant popularity due to its versatility in producing custom parts and prototypes efficiently. Moreover, it enables designers to experiment with complex geometries that would be difficult or costly to achieve with traditional manufacturing techniques. This article presents research focused on the mechanical properties (tensile strength and elongation) of FFF printed parts made of polyethylene terephthalate glycol (PETG) in three infill density patterns: 100% rectilinear, 50% gyroid, and 50% Hilbert curve. The article describes the strengths and weaknesses of the material used and compares the mechanical properties of individual infill printing patterns.

• Periodical: Solid State Phenomena (Volume 372)
• Pages: 3-11
• DOI: https://doi.org/10.4028/p-eRH68O
• Online since: July 2025
• Authors: Marcel Kohutiar*, Róbert Janík, Ivan Labaj, Lucia Kakošová, Michal Krbat'a, Pavol Mikuš, Lenka Bartošová
• Keywords: 3D Printing, Additive Technology, Fused Filament Fabrication, PETG, Plastic

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