PLA vs. ABS in Schools: A Comparison

Making parts is just one application of 3D printing in the classroom. It teaches practical engineering, problem-solving, and design thinking. However, if the print falls off the bed during the project, it will be the biggest headache for both the students and the professors. 

As far as 3D materials go, PLA and ABS are among the most popular choices. Even if they print well, their bed adhesion behaviors couldn't be more different. To determine which material is best for schools, this article examines PLA and ABS in depth, utilizing clear performance indicators (KPIs) and genuine classroom scenarios.

Why Does Bed Adhesion Matter So Much in the Classroom?

When compared to ABS, PLA prints considerably better on regular school printers. When using clean PEI sheets or glass with a glue stick, schools that use PLA often have adhesion success rates ranging from 90 to 95% for small to medium prints.

Unfortunately, open classrooms are not ABS's strong suit. The success rate drops to 60-70% without enclosures or adhesion aids, particularly for larger prints. It takes more time to prepare and more maintenance, but adhesion can improve to 80-85% with the right configuration (heated chamber, 100 °C bed, glue slurry).

KPI:

• PLA: 90–95% first-layer success
• ABS: enclosed printer with aids: 80–85%, open printer: 60–70%

What Kind of Heat Does Each Material Really Need to Print Successfully?

PLA prints using cooler, less risky temperatures. Nozzle settings typically fall between 200 and 215 °C, whereas bed temperatures vary between 50 and 65°C. Because of this, novices will have an easier time and fewer chances of burns.

ABS requires more advanced settings. When operating, beds typically reach temperatures of 90–110 °C, while nozzles can reach 230–250 °C. Preparation time for prints might be up to 30–40% greater than with PLA due to the lengthier warm-up.

KPI:

• PLA bed: 50–65 °C
• ABS bed: 90–110 °C
• PLA preheat time: ~3 minutes
• ABS preheat time: ~5–7 minutes

How Does Each Material Handle Bigger Prints Without Curling Up?

Dissimilarities in adhesion become most apparent during warping. Even on objects larger than 150 mm, there is minimal warping due to PLA's low shrinkage. When printed on open beds, only about 5–10% of PLA components exhibited corner lift throughout testing.

As it cools, ABS contracts considerably. When printing pieces larger than 100 mm, open-air printers might have warping rates of 30–40%. Even with enclosed printers, this is still greater than PLA, albeit it decreases to around 10-15%.

KPI:

• PLA warping rate: 5–10%
• ABS warping rate: 30–40% (open), 10–15% (enclosed)

How Much Work Is Actually Necessary to Make PLA or ABS Stick?

PLA requires very little in the way of planning. Isopropyl alcohol wipes are usually sufficient. Average maintenance time per print is one to two minutes.

It is common to need adhesive sprays, ABS slurry, or glue sticks while working with ABS. Each job's surface preparation can take 5–10 minutes, and there will be additional cleanup time afterwards. As a result, instructors end up with less time to teach and more work to do.

KPI:

• PLA prep time: 1–2 minutes
• ABS prep time: 5–10 minutes

Best 3D Design Software for Education

When it comes to 3D printing in a classroom, SelfCAD can be extremely helpful for students and teachers. It offers an all-in-one 3D modeling and slicing platform that’s easy to use—even for beginners. The software runs both online as well as on Windows and Mac, and hence students can use it to create 3D models both online and offline. It also includes built-in interactive tutorials so students can learn how the software works, and teachers can also create step-by-step tutorials for students to follow.

Choosing the Right Filament for School 3D Printing Beds

Bed adhesion is an area where PLA shines for schools, but ABS is a bust. More success, fewer failures, quicker prep, and lower emissions are all benefits. Still, ABS can function, but only in state-of-the-art labs that have filters, enclosed printers, and more attentive teacher supervision.

Frequently Asked Questions

1. In educational 3D printing, why is bed adhesion so critical?

Thanks to bed adhesion, the first layer remains firmly attached to the print bed. A failed first layer usually indicates a failed print overall. This disturbs classes, uses up filament, and is a waste of time. Students will see results quickly and remain motivated with good adherence.

2. In your opinion, is PLA or ABS simpler for kids to work with?

Switching to PLA is a breeze. It takes less time to prepare and prints at lower temperatures, and it clings effectively to typical classroom printer surfaces. Using ABS in 3D printing typically necessitates hotter beds, enclosed printers, and adhesion aids like glue or slurry. As a rule, PLA works better in classrooms.

3. Can ABS always twist in a classroom setting?

Not necessarily, although it's far more probable than PLA, particularly, bigger ABS components tend to curl or rise in the absence of a housing and regulated airflow. While it is possible to lessen warping with the right setup, doing so in a hectic classroom setting is more challenging.

4. Is the air quality in the classroom better protected by PLA or ABS?

Yes. PLA has less smells and produces fewer pollutants. When not properly vented or filtered, ABS releases styrene and additional ultrafine particles, both of which can be irritating. For open classrooms, this means PLA is the safer option.

5: Is ABS still a viable option for schools?

Of course, but that's assuming they have roomy printers, good air circulation, and enough lead time. Parts that are heat-resistant or otherwise difficult to work with, like those kids use for robotics competitions, are ideal for ABS. The reliability of PLA is higher for routine instruction and beginner projects.