If you’re working on a project that requires the use of 3D printed parts as moulds for fiberglass, you may be wondering which filament is best suited for the job. PLA and PETG are two of the most popular filaments used for 3D printing, but they have different properties that make them better suited for specific applications. In this article, we’ll compare PETG vs PLA for fiberglass moulds to help you make an informed decision.

What is PLA Filament?

PLA or polylactic acid is a biodegradable, plant-based thermoplastic that is easy to use and widely available. It has a low melting temperature, which makes it a popular choice for beginners and hobbyists. PLA is also known for its vibrant colors and ability to produce highly detailed prints with a smooth surface finish.

What is PETG Filament?

PETG or glycol-modified PET is a thermoplastic that combines the best properties of ABS and PLA. It is strong, durable, and resistant to high temperatures and water. PETG is also easy to print with and produces prints with good layer adhesion and minimal warping.

PETG vs PLA: Strength and Durability

When it comes to strength and durability, PETG outperforms PLA. PETG is extremely durable and flexible, making it ideal for high-stress parts or components that need to withstand impact. PETG also has a higher heat distortion temperature than PLA, which means it can withstand higher temperatures without deforming or melting.

On the other hand, PLA is less durable and more brittle than PETG. It is prone to cracking or breaking under stress, making it less suited for applications that require strength and durability.

PETG vs PLA: Ease of Printing

PLA is known for its ease of printing and is often recommended for beginners or hobbyists. It has a low melting temperature and doesn’t require a heated bed, which makes it easier to use on most 3D printers. PLA also produces less odor and fumes during printing, making it more convenient to use in a home or office setting.

PETG, on the other hand, is slightly more difficult to print with than PLA. It requires a higher printing temperature and a heated bed to prevent warping or delamination. PETG filament is also more prone to stringing or oozing during printing, which can affect the quality of the final print.

PETG vs PLA: Shrinkage and Distortion

PETG has minimal shrinkage and distortion during printing, which makes it ideal for printing large or complex parts. It also has good layer adhesion and doesn’t require a cooling fan during printing.

PLA, on the other hand, is more prone to shrinkage and distortion during printing. It requires a cooling fan to prevent warping or delamination, especially when printing large or complex parts.

PETG vs PLA: Temperature for 3D Printing

PETG and PLA require different printing temperatures and bed temperatures. PETG has a higher melting temperature than PLA, which means it requires a higher printing temperature and a heated bed to prevent warping or delamination.

Here are the recommended printing temperatures and bed temperatures for PETG and PLA:

PETG

• Printing temperature: 230-250°C
• Bed temperature: 70-80°C

PLA

• Printing temperature: 180-220°C
• Bed temperature: 20-45°C

PETG vs PLA: Price

When it comes to price, PLA is slightly cheaper than PETG. PLA is widely available and is often sold at a lower price point due to its popularity. PETG, on the other hand, is slightly more expensive due to its superior properties and durability.

PETG vs PLA: Sample Applications

Both PETG and PLA have their own unique set of applications when it comes to 3D printing.

PLA is commonly used for early-stage prototyping, showcase models, and quick fixtures. It is also ideal for printing decorative objects or parts that require a smooth surface finish.

PETG, on the other hand, is more commonly used for mechanical components, electronic device housings, and transparent elements. Its resistance to high temperatures and water makes it ideal for applications that require strength and durability.

PETG vs PLA: Additional Information

When printing with PETG, it’s important to note that it is more prone to stringing or oozing during printing. This can be minimized by adjusting the retraction settings in your slicing software.

When printing with PLA, it’s important to keep in mind that it is more prone to shrinkage and distortion during printing. This can be minimized by using a cooling fan or by printing smaller parts.

Conclusion

When it comes to PETG vs PLA for fiberglass moulds, both filaments have their own unique set of properties and applications. PETG is stronger, more durable, and more resistant to high temperatures and water, making it ideal for applications that require strength and durability. PLA is easier to print with and produces prints with a smooth surface finish, making it ideal for decorative objects or parts that require a smooth surface finish. Ultimately, the choice between PETG and PLA depends on the specific requirements of your project.

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