PET Filament vs. Polycarbonate Filament

Attribute	PET Filament	Polycarbonate Filament
Material	Polyethylene Terephthalate	Polycarbonate
Strength	Good	High
Flexibility	Flexible	Rigid
Temperature Resistance	Up to 70°C	Up to 130°C
Transparency	Transparent	Transparent

Introduction

When it comes to 3D printing, choosing the right filament is crucial for achieving the desired results. Two popular options in the filament market are PET (Polyethylene Terephthalate) and Polycarbonate. Both filaments have their own unique attributes that make them suitable for different applications. In this article, we will compare the key characteristics of PET filament and Polycarbonate filament to help you make an informed decision for your 3D printing projects.

Strength and Durability

PET filament is known for its strength and durability, making it a popular choice for functional parts that require toughness. It has a high tensile strength and can withstand impact, making it ideal for parts that need to endure stress. On the other hand, Polycarbonate filament is even stronger than PET filament. It has a higher impact resistance and can withstand higher temperatures, making it suitable for applications where extreme durability is required.

Flexibility

When it comes to flexibility, PET filament is more flexible than Polycarbonate filament. This makes it easier to work with when printing intricate designs that require some degree of flexibility. However, Polycarbonate filament is more rigid and less flexible compared to PET filament. This rigidity can be beneficial for parts that need to maintain their shape under stress or high temperatures.

Temperature Resistance

Both PET filament and Polycarbonate filament have good temperature resistance, but Polycarbonate filament has a higher glass transition temperature compared to PET filament. This means that Polycarbonate filament can withstand higher temperatures without deforming, making it suitable for applications where heat resistance is crucial. PET filament, on the other hand, has a lower glass transition temperature, which may limit its use in high-temperature environments.

Printability

When it comes to printability, PET filament is easier to print with compared to Polycarbonate filament. PET filament has good adhesion to the print bed and is less prone to warping during printing. It also has a lower printing temperature, which makes it more suitable for a wider range of 3D printers. On the other hand, Polycarbonate filament can be more challenging to print with due to its higher printing temperature and tendency to warp. It may require a heated print bed and an enclosed print chamber to achieve successful prints.

Chemical Resistance

Both PET filament and Polycarbonate filament have good chemical resistance, but Polycarbonate filament is more resistant to chemicals compared to PET filament. Polycarbonate filament can withstand exposure to a wider range of chemicals without degrading, making it suitable for applications where chemical resistance is important. PET filament, on the other hand, may be more susceptible to certain chemicals, so it is important to consider the specific requirements of your project when choosing between the two filaments.

Cost

In terms of cost, PET filament is generally more affordable than Polycarbonate filament. This makes PET filament a cost-effective option for projects where budget is a concern. Polycarbonate filament, on the other hand, is more expensive due to its higher strength and durability. While the initial cost of Polycarbonate filament may be higher, its superior properties may justify the investment for certain applications that require extreme toughness and temperature resistance.

Conclusion

In conclusion, both PET filament and Polycarbonate filament have their own unique attributes that make them suitable for different applications. PET filament is known for its strength, flexibility, and affordability, while Polycarbonate filament offers superior strength, temperature resistance, and chemical resistance. When choosing between the two filaments, it is important to consider the specific requirements of your project and weigh the pros and cons of each filament to make an informed decision. Ultimately, the choice between PET filament and Polycarbonate filament will depend on the specific needs of your 3D printing project.