PETG - polyethylene terephthalate glycol
PETG, or polyethylene terephthalate glycol, is a thermoplastic polymer distinguished by its combination of strength, toughness, and flexibility. PETG is a modified version of PET (polyethylene terephthalate) and contains glycol, which gives the material added clarity and makes it more resistant to impact and chemicals. Because of these properties, PETG is widely used in the 3D printing industry, in the medical field, in packaging manufacturing, and in other applications where high strength and clarity are required.
A major advantage of PETG is its ease of processing. It extrudes easily and adheres well to 3D printer print beds, making it a popular material for Fused Deposition Modeling (FDM) printing. Furthermore, PETG is more resistant to UV light and chemicals than many other plastics and offers greater toughness and flexibility than, for example, PLA, without becoming brittle. This makes it ideal for producing durable and transparent objects that need to withstand a certain degree of stress.
One disadvantage of PETG is its tendency to string and its tendency to deform more easily if the printing parameters are not optimally set. Despite these challenges, PETG is an excellent choice for applications requiring both strength and transparency.
| Raw material properties | Synthetic |
| density | medium ( ~ 1.38 g/cm³) |
| softening temperature | 80 °C |
| Melting point | 200 – 230 °C |
| Dimensional stability | Up to a maximum of 70 °C |
| Flammable? | Building material class B1, flame-retardant |
| Weather resistance | High |
| Elongation at break | 4-6% |
| UV resistance/fading | High |
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