3D printing -- a 'dusty' business?

https://www.eurekalert.org/pub_releases/2020-11/bfif-3p-111220.php

 

News Release 12-Nov-2020
BfR Federal Institute for Risk Assessment

 

To close the substantial gaps in our knowledge, scientists at the German Federal Institute for Risk Assessment (BfR) are investigating which particles are released into the environment and what their properties are. Different substances are released into the air depending on the material used for printing. For example, BfR experts were able to detect particles of the widely-used plastic polylactic acid and copper crystals, among other substances.

The size of the particles was 50 nanometres (polylactic acid) and 120 to 150 nanometres (copper). This means that they are so small that they can get into the alveoli, the smallest branches of the lungs. The higher the temperature during "printing", the more particles were released. The BfR is now exploring whether "3D printer dust" poses a health risk.


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The BfR, BAM and CPSC presented their initial results at the meeting. These showed that volatile components and particles are released during printing. Release is influenced by the materials used (plastic, dyes, additives) and the printing temperature. Investigations con-ducted by BAM and CPSC were carried out with 3D printers, while the BfR also tested 3D printing pens. There is little information available on possible health effects so far, so the BfR sees this as a core research area.

Different measures were discussed to reduce the release and ensure consumer protection. Other issues included possible risks in the subsequent treatment of 3D printed objects (e.g. through smoothing down) as well as the use of other 3D printing methods, such as stereo-lithography (SLA) or selective laser sintering (SLS). Better ways to distribute the information regarding possible health risks to the consumers were also discussed.