Which is better PETG filament or ABS filament?

The choice between PETG (Polyethylene Terephthalate Glycol) and ABS (Acrylonitrile Butadiene Styrene) filament depends on your specific requirements and preferences. Here are some key factors to consider when comparing the two:

1. Strength and Durability: ABS filament is generally known for its higher strength and impact resistance compared to PETG. It can withstand higher temperatures and is less prone to warping. If you need parts that require extra durability or will be subjected to mechanical stress, ABS might be a better choice.

2. Flexibility and Transparency: PETG filament has better flexibility and is less brittle compared to ABS. It also has excellent transparency, making it suitable for applications that require see-through or translucent parts, such as medical devices or lighting fixtures.

3. Ease of Printing: PETG filament is generally easier to print with compared to ABS. It has a lower printing temperature, reduced odor during printing, and minimal warping, which makes it more beginner-friendly. ABS requires a higher printing temperature, proper ventilation, and a heated bed to mitigate warping issues.

4. Chemical Resistance: Both PETG and ABS filaments have good chemical resistance, but ABS tends to be more resistant to certain solvents, including acetone. If your parts will come into contact with specific chemicals, ABS might be a better choice.

5. Environmental Impact: PETG is considered more environmentally friendly than ABS. It is a recyclable material and has a lower carbon footprint. ABS, on the other hand, emits potentially harmful fumes during printing and is not as easily recyclable.

Ultimately, the choice between PETG and ABS filament depends on the specific requirements of your project. Consider the desired properties of your printed parts, the printing conditions available to you, and any specific environmental considerations.