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(a) Production of plastics worldwide from 1950 to 2018 (in million metric tons) and (b) PET plastic bottle recycling rates among different countries in 2017* and 2018

(a) Production of plastics worldwide from 1950 to 2018 (in million metric tons) and (b) PET plastic bottle recycling rates among different countries in 2017* and 2018

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This article is a short review of the circular material economy and recycling in the additive manufacturing (AM) of polymers. In the recent years, there has been a surge regarding the production of numerous products through AM of various polymers. AM can provide an opportunity for a better manufacturing solution to facilitate productivity and susta...

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... the world is on the increase and in general is pernicious towards the environment causing pollution that harms aquatic species and humans. Polymer/plastic production has increased worldwide from 1.5 million metric tons in 1950 to 359 million metric tons in 2018 (Garside 2019). The production of plastics worldwide from 1950 to 2018 is shown in Fig. 2a. Approximately 4 to 12 million metric tons of plastics have accumulated in terrestrial waters, negatively affecting the aquatic life ( Jambeck et al. 2015). Due to their mass production and relatively low cost, polymers are increasingly used in day-to-day products for humans. Between 1950 and2015, 8300 million metric tons of plastics ...
Context 2
... is one method by which waste polymers have been remanufactured into new useful products. However, it is a complex process that involves a number of processing steps. Nevertheless, the life of polymers can be increased through recycling and reuse. The recycling of polymers has been substantially pursued by different nations. For instance, Fig. 2b shows the recycling rate of polyethylene terephthalate (PET)-based containers In the recent years, the processing of polymers through AM has increased due to the desirable characteristics of the process ( Ngo et al. 2018). AM, otherwise known as 3D printing, is a fast-growing technique that is making a revolution in the manufacturing ...

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