What makes PETG the optimal choice for 3D printing?

1 PETG vs PLA and ABS

The two most popular materials for 3D printing are PLA and ABS. PLA is a biodegradable plastic that is easy to print with, but has low heat resistance and strength. ABS is a strong and durable plastic that can withstand high temperatures, but is prone to warping and cracking, and requires a heated bed and enclosure. PETG, on the other hand, combines the best of both worlds. It has high strength and impact resistance, similar to ABS, but it also has good flexibility and adhesion, similar to PLA. Moreover, PETG is more resistant to chemicals, moisture, and UV rays, making it suitable for outdoor and industrial applications.

2 PETG Printing Settings

To print with PETG, you need to adjust your 3D printer settings accordingly. PETG prints at a higher temperature than PLA, typically around 230-250°C, depending on the brand and color. You also need to lower your cooling fan speed, as too much cooling can cause layer separation and brittleness. The bed temperature should be around 70-80°C, and you may need to apply some glue or hairspray to improve adhesion. The print speed should be moderate, around 40-60 mm/s, and you may need to increase the retraction distance and speed to avoid stringing and oozing.

3 PETG Post-Processing

One of the benefits of PETG is that it does not require much post-processing, as it has a smooth and glossy finish. However, if you want to improve the appearance or functionality of your prints, you can use some methods to achieve that. For example, you can use sandpaper, files, or knives to remove any blobs, strings, or supports. You can also use a heat gun or a blowtorch to smooth out the surface or weld parts together. You can also paint PETG with acrylic or enamel paints, but you may need to apply a primer first to ensure good adhesion.

4 PETG Advantages

PETG is the optimal choice for 3D printing due to its many advantages, such as being strong and durable with high impact resistance and flexibility. It is also easy to print with, having good layer adhesion and minimal warping and shrinkage. Furthermore, PETG is resistant to chemicals, moisture, and UV rays, making it suitable for outdoor and industrial applications. Additionally, it is recyclable and environmentally friendly, as it does not emit harmful fumes or odors.

5 PETG Disadvantages

PETG is not without its drawbacks, and it's important to be aware of them. Generally, PETG is more expensive than PLA and ABS and may not be available in as many colors and variations. Additionally, it is more prone to scratching and abrasion, and may lose its glossiness over time. Furthermore, PETG is sensitive to moisture and dust, so it should be stored in a dry and sealed container. Finally, it can be difficult to achieve fine details and sharp corners due to its higher viscosity and flow rate.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?