In the world of 3D printing, only PLA surpasses PETG in popularity—and it’s easy to see why. PETG, essentially the same material used for water bottles globally, incorporates glycol to enhance strength, durability, impact resistance, and its ability to withstand the higher temperatures required for 3D printing. Read on to explore the advantages and disadvantages of using PETG for your 3D printing needs.
Advantages of PETG
Durability and Strength:
PETG is renowned for its durability and resistance to impacts and stress, making it an ideal choice for components requiring high strength.
UV Resistance:
PETG offers better resistance to UV radiation and its adverse effects on 3D prints compared to many other materials. This makes it suitable for outdoor applications, unlike materials such as PLA.
Chemical Resistance:
PETG has good chemical resistance, enabling it to withstand certain chemicals without degrading. This makes it suitable for projects where exposure to chemicals is a consideration.
Eco-Conscious Printing:
Being a variant of PET, PETG is recyclable. However, its production does involve higher carbon emissions compared to PLA, which is the leader in this aspect. The PETG we use is manufactured in Sweden, minimizing carbon emissions by avoiding long-distance shipping.
Low Shrinkage:
PETG exhibits low shrinkage during the cooling process, reducing the risk of warping or shrinking—a common issue with materials like ABS.
Disadvantages of PETG
Heat Sensitivity:
While PETG has a wider temperature range compared to many other materials, it remains sensitive to high temperatures. Exposure to extreme heat can cause the print to deform. For applications requiring higher heat resistance, materials like nylon might be a better choice.
Brittleness:
Despite its durability, PETG is not indestructible. It's crucial to consider the intended application and the mechanical stresses the material might face. For example, if the application involves high-torque gears, other materials might be more suitable.
When to Use PETG
You need durable and wear-resistant components that can withstand outdoor conditions.
The project requires resistance to certain chemicals.
When Not to Use PETG
The project demands extreme heat resistance.
Mechanical breaking strength is a critical factor for the application.
Conclusion
Choosing the right material for your 3D printing project is essential for its success. PETG is a versatile material, well-suited for many applications due to its durability, chemical and UV resistance, and recyclability. If you need a material capable of enduring outdoor conditions and moderate mechanical stress for years, PETG is likely a great choice. Contact us for more information about material selection or our 3D printing services and how we can support your project.