ASA vs. PLA

Attribute	ASA	PLA
Acronym	Acetylsalicylic Acid	Polylactic Acid
Chemical Structure	C9H8O4	(C3H4O2)n
Common Uses	Pain relief, anti-inflammatory	Biodegradable plastics, medical implants
Biodegradability	Not biodegradable	Biodegradable
Production	Synthetic	Derived from renewable resources

Introduction

When it comes to 3D printing, choosing the right filament material is crucial for achieving the desired results. Two popular options in the market are ASA (Acrylonitrile Styrene Acrylate) and PLA (Polylactic Acid). Both materials have their own unique attributes and characteristics that make them suitable for different applications. In this article, we will compare the key features of ASA and PLA to help you make an informed decision for your 3D printing projects.

Material Composition

ASA is a thermoplastic polymer that is composed of acrylonitrile, styrene, and acrylate. This combination of materials gives ASA its excellent weather resistance, making it ideal for outdoor applications. On the other hand, PLA is a biodegradable thermoplastic polymer derived from renewable resources such as corn starch or sugarcane. PLA is known for its environmental friendliness and biodegradability, making it a popular choice for eco-conscious users.

Strength and Durability

When it comes to strength and durability, ASA is known for its superior impact resistance and toughness. ASA is able to withstand harsh weather conditions, UV exposure, and chemicals, making it a great choice for outdoor and industrial applications. On the other hand, PLA is not as strong as ASA and is more prone to cracking under stress. PLA is better suited for lightweight and non-load bearing applications where strength is not a primary concern.

Heat Resistance

ASA has a higher heat resistance compared to PLA, making it suitable for applications that require exposure to high temperatures. ASA can withstand temperatures up to 90-95°C without deforming, making it a good choice for parts that will be exposed to heat. PLA, on the other hand, has a lower heat resistance and can start to soften and deform at temperatures above 60°C. It is important to consider the heat resistance of the material when choosing between ASA and PLA for your 3D printing projects.

Printability

Both ASA and PLA are known for their ease of printability, making them popular choices for 3D printing enthusiasts. ASA has good adhesion to the print bed and is less prone to warping compared to ABS, another popular filament material. PLA is also easy to print with and does not require a heated print bed. However, PLA can be more prone to stringing and oozing during printing, which may require additional post-processing to clean up the final print.

Surface Finish

ASA and PLA both offer a smooth surface finish when printed, making them suitable for a wide range of applications. ASA has a glossy finish that is resistant to scratches and fading, making it ideal for outdoor signage and displays. PLA, on the other hand, has a matte finish that is more prone to scratching and fading over time. The choice between ASA and PLA for surface finish will depend on the specific requirements of your project.

Cost

When it comes to cost, PLA is generally more affordable compared to ASA. PLA is widely available and is produced from renewable resources, making it a cost-effective option for 3D printing projects. ASA, on the other hand, is slightly more expensive due to its superior properties such as weather resistance and durability. The cost difference between ASA and PLA may influence your decision depending on your budget and project requirements.

Conclusion

In conclusion, both ASA and PLA have their own unique attributes and characteristics that make them suitable for different applications. ASA is known for its superior strength, durability, and weather resistance, making it ideal for outdoor and industrial applications. PLA, on the other hand, is biodegradable, environmentally friendly, and cost-effective, making it a popular choice for eco-conscious users. When choosing between ASA and PLA for your 3D printing projects, consider the specific requirements of your project and select the material that best meets your needs.