Evaluation of the Potential of Large-Scale 3D Printing to Promote a Circular Economy of PET Plastic Bottles: Comparison Between European and North American
摘要
The increasing accumulation of plastic waste has intensified the urgency for sustainable recycling solutions. Among these, distributed recycling for additive manufacturing (DRAM) has emerged as a promising approach to revalorize post-consumer plastic waste in a closed loop. This study evaluates the potential of the DRAM model in the European and North American contexts, specifically for the recycling of post-consumer plastic bottles composed of polyethylene terephthalate (PET) for the body and high-density polyethylene (HDPE) for the cap, without prior material separation. More precisely, the research analyzes the efficiency and requirements to develop a plastic circular loop in France and Canada. A methodology was developed to assess the collection, transformation, and 3D printing of the recycled bottles, incorporating modifications to enhance 3D printer performance and material processing. Functional objects were 3D printed to assess practical applications, producing furniture and decorative products. The findings indicate that, while DRAM can be adapted to different regional contexts, standardized material preprocessing, optimized 3D printing extrusion parameters and enhanced flow monitoring are critical to improving reproducibility. This study contributes to advancing circular economy practices, providing a scalable and sustainable strategy for plastic waste valorization through additive manufacturing.