PLA vs TPU in 3D Printing: What’s the Difference?

FAQ

When to print with TPU?

TPU 3D printing provides unique possibilities that cannot be achieved using other printing materials like PLA, nylon, or ABS. The best time to print with TPU is to produce consumer goods such as footwear and phone cases, flexible electronics, and automotive. Happily, the material is soft and elastic, chemical resistant, and available in a wide range of colors. 

Is PLA better than TPU?

PLA and TPU are the two common 3D printing materials. However, both of them have pros and cons. If you are looking for an inexpensive filament and one that is easy to print, the best one to consider is PLA. Moreover, PLA is compostable and more environmentally friendly than TPU. But if you would like to add flexibility to the prints, then the material to use is TPU. Generally, PLA is easier to print, inexpensive, more environmentally friendly, and the best 3D material for beginners. However, it is impossible to make flexible designs with PLA. Also, it is prone to oozing when heated. On the other hand, TPU is flexible, chemical resistant, and withstands higher compressive strength. But it is prone to clogging, must be printed at a low temperature, and is difficult to post-process. 

Is flexible PLA the same as TPU?

Flexible PLA and TPU have many similarities. However, they have differences as well. For instance, it is easier to work with TPU than with flexible PLA. On the other hand, flexible PLA is food-safe. The material can be used to print food containers and utensils. But TPU is not food-safe.  But Flexible PLA is more flexible than TPU. So, when planning to print something to wear, the best material to consider is flexible PLA. But TPU is more rigid than flexible PLA. Thus, it is resistant to abrasion.

Can you mix PLA and TPU?

One fantastic thing about 3D printing material is that you can experience it with two filaments. It is possible to mix PLA and TPU. You can improve models using the two materials. But the two materials are different. PLA is one of the easiest to print 3D materials. On the other hand, TPU is a flexible material. By mixing the two materials, you open new possibilities. But keep in mind that PLA and TPU are two materials that cannot bond well with each other. However, many people had succeeded in combining the two materials. It is also an excellent strategy to add a unique feel to your 3D prints. 

Is TPU flexible?

Yes, Thermoplastic Polyurethane (TPU) is notably flexible. It is a 3D printing filament valued for its elastic properties, capable of stretching up to 500% without breaking. With its rubber-like characteristics, TPU is ideal for creating parts that need to bend or flex, such as tubes, seals, and vibration dampeners. Its ability to absorb impact makes it suitable for various practical applications.

Is TPU filament toxic?

Thermoplastic Polyurethane (TPU) filament is generally considered safe as it is non-toxic and odorless. However, like many plastics, it can emit harmful fumes if burned or exposed to high temperatures during processing. Proper ventilation and air filtration are crucial in your workspace to mitigate exposure to any potentially toxic fumes during 3D printing.

What does PLA stand for in 3D printing?

PLA stands for Polylactic Acid. It is a biodegradable thermoplastic derived from renewable resources like corn starch or sugarcane. This eco-friendly material is one of the most popular filaments used in 3D printing, known for its ease of use, good surface quality, and low shrinkage rate.

Is TPU food safe?

TPU can be food safe, but not all TPU filaments are automatically suitable for contact with food. Food-safe TPU must meet specific FDA regulations that certify it does not contain harmful chemicals and will not leach substances into food. Always check if the TPU filament is certified for food contact before using it for culinary applications, such as creating containers, utensils, or other items that come into direct contact with food.