3D Printing with PETG

What is PETG 3D Printer Filament?

PETG, or Polyethylene Terephthalate (glycol-modified), is durable like ABS filament and 3D prints easily like PLA filament. As a high-end, rigid material, PETG performs well for applications that require high strength and impact resistance. PETG also has translucent properties, but it’s not entirely transparent.

When it comes to flexibility, PETG trends like a rigid ABS. If you’re looking for something with more flex, try NinjaFlex^® TPU 3D printer filament. If cost and biodegradability are important for you, PLA filaments like colorFabb PLA/PHA and colorFabb Co-Polyesters are the way to go.

PETG Uses & Applications

Because of its strength and dependability, PETG is widely used in mechanical parts and industrial manufacturing. As a translucent co-polyester with a smooth finish, it’s also used in fashion for bracelets, rings and custom cosplay pieces.

It’s also recyclable, and its shiny, translucent properties are great for making plastic water bottles. PETG is also used for other food-compatible applications such as cups and plates.

How to print with PETG

PETG is easy to print on most FDM printers.

Temperature: Start with a heated bed. PETG prints at high temperatures, so begin your print at 220°C to 260°C, increasing or decreasing by five degrees until you find the right balance.

Common issues: Like ABS, PETG is prone to warping because it solidifies quickly. Ensure the first layer has firm adhesion to the heated print bed. You can also try an adhesive or print inside an enclosure to better regulate the temperature. Stringing and oozing are also common, so you’ll want to lower your nozzle temperature incrementally. Check out our Troubleshooting Guide for common print issues and fixes.

Properties of PETG: Pros & Cons

Pros of PETG

• Strong
• Easy to print
• Good chemical resistance
• Translucent properties
• Heat resistant (up to 100°C)
• Wide variety of colors and styles
• Cost-efficient
• Recyclable

Cons of PETG

• Prone to warping and cracking
• No flexibility
• Difficult to post-process, particularly gluing

FAQs about PETG

Is PETG toxic to print?

While PETG has some ABS qualities such as durability, it doesn’t give off harmful fumes and odor while printing. When it comes to end-products, PETG-printed materials are safe to be used with food or as water bottles. But it’s always a good idea to read the brand’s usage guidelines first.

Is PETG better than PLA?

In applications that require strength, PETG is the better option. If you’re looking for something that’s cost-efficient and biodegradable, then look to PLA.