ABS vs. PLA 3D Printing Filaments: Characteristics, Best Printing Practices

ABS (acrylonitrile butadiene styrene) and PLA (polylactic acid) are among the most extensively used 3D printing filaments in FDM printing. Every material has distinct features influencing the prints’ quality, strength, and usability. Thus, knowing which materials are different, their properties, and how to use them is important, especially when using Snapmaker products. Whether for leisure or work, this guide will help weigh the pros and cons of ABS and PLA, aiding effective printing decisions.

Table of Contents

• Material Properties: ABS vs. PLA
• Best Printing Practices for PLA and ABS
• Choosing between ABS and PLA
• FAQs

 

Material Properties: ABS vs. PLA

Before weighing between 3d printer filament abs vs. pla, one must first understand the features of the two materials. To this end, ABS is a thermoplastic polymer with strength, flexibility, and impact resistance and can withstand mechanical shock.

ABS’s high melting point makes it suitable for making automotive components and domestic wares, but the higher temperatures also lead to the release of harmful gasses during the printing process, which requires good ventilation.

PLA is a biodegradable plastic that can be made from cornstarch and other safe materials. It is a low-cost filament that is virtually simple to use and does not require a heated bed or excessively high temperatures. Despite not being as strong or flexible as ABS, PLA has no unpleasant smells, ensuring easy use for fresh beginners and eco-friendly consumers.

For now, let’s move on to the aspects of each material.

Note: The information in this article applies to Snapmaker materials. 

Property	ABS	PLA
Tensile Strength	33.3 ± 0.8 MPa	46.6 ± 0.9 Mpa
Charpy Impact Strength	12.6 ± 1.1 kJ/㎡	2.7 ± 0.2 kJ/㎡
Durability	Long-lasting and weather-resistant	Less durable and prone to wear
UV Resistance	Moderate, can yellow over time	Weak, fade in sunlight
Chemical Resistance	Good with oils and acids	Poor chemical resistance
Temperature Resistance	It withstands up to 100°C	Lower, begins to soften around 60°C
Hygroscopy	Absorbs more moisture; careful storage is needed	Absorbs minimal moisture
Food Safety	Food-safe	Generally food-safe, but depends on additives

Tensile Strength

In terms of tensile strength, PLA (46.6 ± 0.9 MPa) surpasses ABS (33.3 ± 0.8 MPa), which makes it more appropriate for such projects. ABS’s tensile strength may be lower, but its composition can bend, so it does not easily break under pressure.

Charpy Impact Strength

ABS excels in Charpy impact strength (12.6 ± 1.1 kJ/㎡), ideal for parts that withstand bumps or drops. PLA, with a lower impact strength (2.7 ± 0.2 kJ/㎡), is more brittle and can easily fracture upon impact, making it best for decorative or light-duty parts.

Durability

ABS is highly durable and weather-resistant, making it a solid choice for outdoor or functional parts. PLA, while easier to print, is less durable and better suited for indoor applications or aesthetic pieces that don’t experience much wear.

UV Resistance

ABS offers moderate UV resistance but may become yellow over time. PLA has weak UV resistance, fading and degrading quickly when exposed to sunlight, making it suitable only for indoor or shaded applications.

Chemical Resistance

ABS performs well even in industrial environments due to its resistance to oils and acids. On the other hand, PLA lacks these qualities and, therefore, is more likely to be eroded when chemicals are present.

Temperature Resistance

ABS can tolerate higher temperatures, staying stable up to around 100°C, making it suitable for parts that may face heat exposure. PLA softens at lower temperatures (around 60°C) and is more likely to deform in warmer settings.

Hygroscopy

PLA absorbs more moisture than ABS, making it essential to store PLA carefully to prevent printing issues. ABS is less hygroscopic, but both materials benefit from dry storage to maintain print quality.

Food Safety

Usually, containers made of ABS and PLA are food-safe, though this will depend on the materials used. PLA is more or less okay to use for things that involve contact with food, but it is still wise to consult the manufacturer before proceeding with prints that will come into contact with any food.

 

Best Printing Practices for PLA and ABS

Printing Parameter

• ABS: The print temperature is generally between 220 °C and 250°C. To reduce the chances of warping, a heated bed (80-110 degrees Celsius) is important, and an enclosure can assist in maintaining the temperature. Good ventilation is also recommended, as ABS emits fumes.
• PLA: The 3D printing temperature typically ranges from 180°C to 220°C. PLA doesn’t necessarily require a heated bed, though setting it between 40 °C and 60°C can improve adhesion. An enclosure isn’t necessary since PLA doesn’t emit strong odors, making it ideal for open spaces.

Tips for Successful Prints

• ABS: To avoid warping, apply an adhesive layer on the bed and use a print enclosure to maintain consistent temperatures. Snapmaker’s video tutorial offers helpful guidelines for working with ABS.
• PLA: PLA can be printed on an open bed but may benefit from a slight temperature boost to enhance adhesion. Although it’s easier to print than ABS, PLA prints can be brittle and should be stored carefully to avoid moisture buildup.

 

Choosing between ABS and PLA for 3D Printer Filaments

Below is a quick comparison table to help you decide which filament to use based on your project needs:

Factor	ABS	PLA
Printing Difficulty	Moderate to challenging	Easy
Mechanical Properties	Tough, impact-resistant	High tensile strength, brittle
Applications	Functional parts, prototypes	Hobby items, aesthetic pieces
Price	Slightly more expensive	Affordable
Smell	Strong, requires ventilation	Mild, no special ventilation needed
Post-processing	Sanding, smoothing with acetone	Painting, sanding

Related reading: Are the Odors Released During 3D Printing Toxic?

 

Final thoughts

Choosing between ABS and PLA depends on your project requirements and experience level. While ABS is robust and long-lasting, it requires careful handling and safety precautions. PLA, by contrast, is eco-friendly and user-friendly and an excellent choice for simple projects or decorative items. Consider using materials from Snapmaker to ensure success, as quality can significantly impact your results. If you wonder how much 3D printer filament costs, you may check out our materials store.

 

FAQs

Q: Is ABS stronger than PLA?

Yes. ABS offers better impact resistance and flexibility than PLA, making it ideal for mechanical applications.

Q: Can I use both PLA and ABS on the same 3D printer?

Yes, but careful considerations are required, such as the printing parameters, filament compatibility between brands, and environmental conditions. Using a dual-extruder setup like Artisan Premium simplifies the process and saves effort.

Q: What is the strongest 3D printer filament?

The “strongest” is hard to define. However, some materials are commonly considered the strongest among easily accessible filaments: Polycarbonate (PC), Polyamide(Nylon), and Carbon Fiber-Reinforced Filaments.

Q: Can moist PLA or ABS cause clogging?

Yes, moist PLA or ABS can indeed cause clogging in 3D printers. When filament absorbs moisture, it can lead to several issues: Bubbles Formation, Nozzle Clogging, and Filament Swelling. It’s crucial to keep your filament dry.

 

Recommended reading: How to Store Your 3D Printer Filament and Prevent Moisture