PETG is a very tough material with good thermal resistance. PETG has universal use, but is especially suitable for printing mechanical parts. It can be used indoors and outdoors. PETG has very low thermal expansion, so it does not warp on the bed and therefore there is no problem with printing large models. Parts for our printers are printed from PETG!
PETG is one of our favorite materials for 3D printing. Printing with it is almost as easy as with PLA, but unlike PLA it can offer many better mechanical properties. The letter G in the PETG abbreviation stands for glycol, which is added during the manufacturing process. Glycol modifies the properties of PET to be less brittle, easier to print, and more transparent when printing with semi-transparent variants. PETG has low thermal expansion, so even when printing large models it rarely warps and peels off the heated bed. In addition, PETG is tough, just flexible enough, and as a result, it often only temporarily bends under stress, preventing breakage.
Unlike PLA or ABS, PETG tends to string a bit, i.e., pull thin strands of plastic during travel moves. You can combat this by increasing retraction and lowering the temperature, but if you use our pre-set profiles in Prusa Slicer, we've already done that for you and the level of stringing should be minimal. If you still encounter it, you can get rid of it by quickly (a few seconds) passing a heat gun over the finished prints.
If you deal with stringing and filament oozing and strong filament adhesion, you will get very durable prints. Thanks to decent thermal resistance, PETG prints are also suitable for outdoor use.
Print Settings
| Nozzle |
250 °C |
| Heated Bed |
70-90 °C |
Basic Properties
|
High temperature resistance |
|
Unsuitable for small parts |
|
Easy printing |
|
Possibility of stringing |
|
Low shrinkage and warping |
|
Poorer bridging quality |
|
Strength and durability |
|
|
|
Easy sanding |
|
|
Notes
This PETG was manufactured directly at Prusa Research.
This 1,75 mm filament was manufactured with an accuracy of +- 0,02 mm
