Like other everyday objects, face masks contain plastic fibers such as polypropylene that remain in the environment for decades until they finally degrade. To solve this problem, the team at the University of Bristol has studied the possibility of transforming the components of these masks into 3D printing material. In the first tests, the team collected a number of defective masks from which they removed the ear loops and nose wire. The masks are then heated and pressed with an iron and non-stick paper to turn them into hard sheets. These in turn were then ground into fine polypropylene pellets from which the masks are made. Finally, the blue pellets are passed through a wire drawing machine that converts them into the manufacturing filament. As the initial masks had undergone a series of high-temperature processes, the researchers felt that this was sufficient to disinfect them and eliminate any possible bacteria or viruses in them.
To get the filament right for a 3D printer, the team turned to Filastruder, an open source product designed specifically by the maker community to recycle printed plastic waste into 3D printing filament. Once they succeeded in developing the filament, the researchers set themselves new challenges in the field. Among them is the possibility of processing mixed materials by treating the mask with the handles in the same process.
They are also looking into large-scale process automation to foster the circular economy and oversee the distribution, collection and recycling of medical equipment. Still, it remains to be seen how this innovative idea that arises with the aim of avoiding environmental contamination of the masks evolves. In the meantime, you can find more information on the university’s website HERE.
Source: 3D Natives
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