PETg (Polyethylene Terephthalate Glycol)
- Has glycol added (hence the “g”)
- Slightly more flexible
- Greater impact resistance
- Absorbs more moisture (Dehydrating PETg before use is a good idea)
PETg can simply be thought of as PET with glycol added. The addition of glycol allows the material to be slightly more flexible, but not as much as TPU or TPE. Having a little more flexibility allows parts to have a greater tolerance to impact compared to PET. Be careful of how you store your PETG as the addition of glycol means that the material absorbs more moisture. Ensure that you keep your PETg 3D printer filament in an airtight environment or dehydrate it before use.
Technical Data Comparison
Conclusion
Whilst PET and PETg 3D printer filament may sound as though they are very similar, it is important to remember that they offer different properties – which should be compared when choosing the most appropriate material for your project.
To summarise – where our regular PETg has a better impact resistance, ONE PET boasts superior technical properties such as tensile strength, not to mention the environmental benefit of 100% recycled content.
Thanks for addressing this issue. I had a hard time printing from the spool of ONE PET I tried, but ended up going back to just using rPLA. Need to try drying it out properly and printing it again when I get the time!