How to 3D Print With PETG Filament

Hot End

Temperature: 230-260 °C

Hot Bed

Temperature: 65-80 °C
Enclosure not required

Cooling

Cooling not required

Build Surface

Blue painters tape
Stick on 3M build surface
Glass
PEI

About PETG

PETG is a strong and slightly flexible filament that lends great properties to a wide range of applications. It has the strength of ABS but is also as easy to print as PLA. The best of both worlds! No warping or shrinkage and a weighted strength of up to 55kgs. PETG's flexibility lends itself to being great for snap fits. It can have a very strong snap fit for functional electronic closures etc.

PETG stands for Polyethylene Terephthalate (with a glycol modification) which is one of the most common polymers used today. It’s used to make water bottles, food packaging, and countless other common plastic items.

3D Printing with PETG

PETG may be as easy to print as PLA but it does require a few different settings. The big one been temperature of the hot end and bed.

Temperature

PETG needs a higher hot end and bed temperature like ABS. Most PETG flows well between 230-260°C and hot bed around 65-80. For Kiwi3D PETG series we find 250°C on the hot end and 75°C bed for the first 10 layers then bring it down to 70°C. PETG is prone to stringing and blobs, so we suggest printing a temperature tower to find the perfect temp. for your 3D printer.

Build Surface

Almost every build surface will provide good adhesion. We find Blue painters tape and stick on 3M build surfaces work best. If you're using glass you're going to want to use some glue or hair spray to stop the corners from lifting. If you're looking for an amazing all around build surface that you can print anything on, check out our Super Stick 3M Build Surfaces.

Cooling

As with ABS you don't need to use the part cooling fan. To achieve the strongest part possible, leave the part fan off. However we like to set our fan to 10% to get great bridging and still have a strong part.

 

Designing Parts for PETG

Designing your parts does not have to be any different. Supports can be easily used to help with over hangs. PETG has a very low shrinkage ratio so your tolerances can be tight for great fitting parts. This also helps with large surface printing when you have a well levelled build surface.

PETG RASPBERRY PI 3 Snap Fit Case
Image source: Thingiverse Bbzed
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