PETG filament

PETG (Polyethylene Terephthalate Glycol-modified) is a popular 3D printing filament known as the perfect middle ground between PLA and ABS. It combines PLA's ease of printing with ABS's strength and durability. The 'G' stands for glycol-modified, which prevents the plastic from becoming brittle and makes it clearer than standard PET (used for soda bottles).

Key Properties of PETG

• High heat resistance: Maintains its shape up to 80–90 °C, whereas PLA deforms around 60 °C.Read more

Common Applications

PETG is ideal for functional and mechanical parts. Typical uses include:

• Outdoor objects like garden tool components or protective housings.

• Mechanical parts such as brackets, gears, and clamps.

• Waterproof items like planters or bottles due to its excellent layer adhesion.

General Printing Guidelines

• Nozzle temperature: 220 °C – 260 °C

• Bed temperature: 65 °C – 90 °C

• Print bed surface: Use a release agent (like glue stick or 3DLAC) on smooth PEI or glass. PETG bonds so strongly that it can rip chunks out of your print bed.

Drawbacks to Consider

• Stringing and oozing: PETG is very fluid when hot, which often leads to fine plastic hairs (stringing) on the model.

• Moisture-sensitive (Hygroscopic): It quickly absorbs moisture from the air. Wet filament causes bubbles and poor print quality, so you often need to dry it before use.