With the development of thermoplastic extrusion materials and equipment technology in recent years, 3D printing has the potential to fully enter the final product application field. 

Not only is the print quality surface getting smoother, but also in terms of printed filament materials, more and more The more it moves towards composite printing, these printed products have engineering-grade performance that is difficult to achieve with injection molded products. The mesh manufacturing of customizable objects through three-dimensional (3D) printing provides great hope for personalized manufacturing, which can improve the adaptability, performance and comfort of equipment and tools used in daily life.

Robots that can build houses, marathon runners’ running shoes, and NASA’s upcoming spacecraft all have one feature in common: they use a large number of 3D printed parts. However, as the enthusiasm for 3D printing continues to grow and expand in the market, the objects printed in this process will also have some defects. Now, a research team has published its latest research results in the journal ACS Applied Materials and Interface. The paper reports that using a simple modification to the original material can improve the strength and toughness of these printed plastics.

As the 3D printing market continues to expand and become more affordable, it is looking for applications in many different fields. But this versatility is often limited by the strength and durability of the printed parts. Most printed parts are printed in layers, and this often leads to weak spots between the layers. Therefore, the strength of 3D printed parts is not as strong as the existing method of injecting plastic directly into the mold. In order to obtain stronger 3D printed parts, Miko Cakmak, Bryan D. Vogt and their colleagues studied whether they can self-reinforce the printed parts by changing the original materials.

The researchers fabricated a structured core-shell polymer filament in which polycarbonate acts as a backbone to support and strengthen 3D printed parts. The olefin ionomer surrounding the polycarbonate core improves and strengthens the connection between the printed layers of the shell. During the test, unlike those without these parts, the printed parts with filaments can withstand the impact without cracking. The new filaments make the strength of 3D printed parts closer to the strength of existing methods.

Link to this article： Improve the toughness of 3D printed plastic parts

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