RESEARCH INTO THE EFFECT OF THE NUMBER OF LAYERS ON THE OPTICAL TRANSPARENCY OF PETG PLASTIC

Abstract

The analysis of the effect of the number of layers of a PET-G (polyethylene terephthalate-glycol, PETG) polymer material formed during 3D-printing as well as determining the thickness of the sample on the optical property was performed. The optical property is determined by the value of the light transmittance at a wave- length of 650 nm. The material whose behavior is studied was processed using the additive FFF technology (Fused Filament Fabrication). The results obtained illustrate the existence of a relationship between the light transmittance and the thickness of the sample. A comparison is made between the optical transparency of PET-G processed by traditional technology (extrusion in a die with a flat slotted cross-section) as well as additive technology.