Retreatment of Polymer Wastes by Disintegrator Milling

Dmitri Goljandin and Priit Kulu

A chapter in Waste Material Recycling in the Circular Economy - Challenges and Developments from IntechOpen

Abstract: Global introduction of waste utilization techniques to the polymer market is currently not fully developed but has enormous potential. Before reintegration of used material into a new product, it normally requires grinding, that is shredding, crushing, or milling. In traditional grinders, the generated stresses in the material to be ground are equal to or less than the strength of the material. If by traditional methods, the stresses generated are compressive + shift, so by milling based on collision are tension + shift. Due to the high stress-material strength ratio at collision, it is possible to crush not only brittle materials but also ductile materials. This process allows easily combining the grinding of composite materials with their separation into individual constituents. In the current study, the mechanical recycling of the following groups of polymer materials was studied: pure brittle and soft polymers (PMMA, HDPE and IER), blends of plastics (ABS+PMMA, PC + ABS), reinforced plastics (PMMA+GFP); elastomers (rubber and tyres), and printed circuit boards (PCB).

Keywords: mechanical recycling; disintegrator mill; selective milling; separation; plastic scrap; composite plastic waste; polymer wastes; plastic powder; electronic wastes; crumb rubber; tyres recycling; electronic wastes; printed circuit boards (search for similar items in EconPapers)
JEL-codes: Q53 (search for similar items in EconPapers)
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Persistent link: https://EconPapers.repec.org/RePEc:ito:pchaps:244756

DOI: 10.5772/intechopen.99715

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