Academic literature on the topic 'Mechanical recycling'

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Journal articles on the topic "Mechanical recycling"

1

NAKAISHI, Naritaka. "Automobile Recycling Policy(Mechanical Systems for Recycling Oriented Society)." Journal of the Society of Mechanical Engineers 109, no. 1055 (2006): 807–10. http://dx.doi.org/10.1299/jsmemag.109.1055_807.

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2

Nemeša, Ineta, Marija Pešić, and Valentina Bozoki. "Mechanical recycling of textile waste." Tekstilna industrija 72, no. 4 (2024): 24–28. https://doi.org/10.5937/tekstind2404024n.

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During mechanical recycling several mechanical treatments are used to degrade textile waste and make it ready for new application in different other industries. Mechanical recycling process consists of several work steps. Pre or post-consumer textile waste is firstly cut in small pieces by a shredding machine. Blending boxes with different storage capacities are used to blend cut textile waste. A feeding unit is placed in between a blending box and a tearing machine. Tearing machines separate individual fibers by tearing small pieces of shredded textile material apart. At the end of the textile recycling process the opened fibers are compressed in needed size bundles to store and transport for their further use. Insufficiently sorted waste is the most serious problem that complicates mechanical recycling processes, reduces the quality of recycled fibers. Currently there are not available efficient methods to recycle coated, laminated textiles and materials with elastan. Compared with other recycling methods the mechanical recycling of textile waste has already decades of experience, it is the most developed, most widely used, requires much lower investments and energy resources.
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3

Strachala, David, Josef Hylský, Kristyna Jandova, Jiri Vaněk, and Š. Cingel. "Mechanical Recycling of Photovoltaic Modules." ECS Transactions 81, no. 1 (2017): 199–208. http://dx.doi.org/10.1149/08101.0199ecst.

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4

Costa, André A., Pedro G. Martinho, and Fátima M. Barreiros. "Comparison between the Mechanical Recycling Behaviour of Amorphous and Semicrystalline Polymers: A Case Study." Recycling 8, no. 1 (2023): 12. http://dx.doi.org/10.3390/recycling8010012.

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The increase in waste has motivated the adoption of the circular economy concept, which assumes particular relevance in the case of plastic materials. This has led to research of new possibilities for recycling plastics after their end-of-life. To achieve this goal, it is fundamental to understand how the materials’ properties change after recycling. This study aims to evaluate the thermal and mechanical properties of recycled plastics, namely polycarbonate (PC), polystyrene (PS), glass fibre-reinforced polyamide 6 (PA6-GF30), and polyethylene terephthalate (PET). With this purpose, injected samples were mechanically recycled twice and compared through thermal and mechanical tests, such as differential scanning calorimetry, hardness, tensile strength, and the melt flow rate. The results show that the amorphous materials used do not suffer significant changes in their properties but exhibit changes in their optical characteristics. The semicrystalline ones present some modifications. PET is the material that suffers the biggest changes, both in its flowability and mechanical properties. This work demonstrates that the mechanical recycling process may be an interesting possibility for recycling depending on the desired quality of final products, allowing for some materials to maintain comparable thermal and mechanical properties after going through the recycling process.
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5

Pin, Jean-Mathieu, Iman Soltani, Keny Negrier, and Patrick C. Lee. "Recyclability of Post-Consumer Polystyrene at Pilot Scale: Comparison of Mechanical and Solvent-Based Recycling Approaches." Polymers 15, no. 24 (2023): 4714. http://dx.doi.org/10.3390/polym15244714.

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Solvent-based and mechanical recycling technology approaches were compared with respect to each process’s decontamination efficiency. Herein, post-consumer polystyrene (PS) feedstock was recycled by both technologies, yielding recycled PS resins (rPS). The process feedstock was subjected to four recycling cycles in succession to assess the technology perennity. The physico-chemical and mechanical properties of the rPS were then evaluated to discern the advantages and drawbacks of each recycling approach. The molecular weight of the mechanically recycled resin was found to decrease by 30% over the reprocessing cycles. In contrast, the solvent-base recycling technology yielded a similar molecular weight regarding the feedstock. This consistency in the rPS product is critical for consumer applications. Further qualitative and quantitative analyses on residual organic compounds and inorganic and particulate contaminants were investigated. It was found that the solvent-based technology is very efficient for purifying deeply contaminated feedstock in comparison to mechanical recycling, which is limited to well-cleaned and niche feedstocks.
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6

Pan, Jun-qi, Zhi-feng Liu, Guang-fu Liu, Shu-wang Wang, and Hai-hong Huang. "Recycling process assessment of mechanical recycling of printed circuit board." Journal of Central South University of Technology 12, no. 2 (2005): 157–61. http://dx.doi.org/10.1007/s11771-005-0031-z.

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7

Finnerty, James, Steven Rowe, Trevor Howard, et al. "Effect of Mechanical Recycling on the Mechanical Properties of PLA-Based Natural Fiber-Reinforced Composites." Journal of Composites Science 7, no. 4 (2023): 141. http://dx.doi.org/10.3390/jcs7040141.

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The present study investigates the feasibility of utilizing polylactic acid (PLA) and PLA-based natural fiber-reinforced composites (NFRCs) in mechanical recycling. A conical twin screw extrusion (CTSE) process was utilized to recycle PLA and PLA-based NFRCs consisting of 90 wt.% PLA and a 10 wt.% proportion of either basalt fibers (BFs) or halloysite nanotubes (HNTs) for up to six recycling steps. The recycled material was then injection molded to produce standard test specimens for impact strength and tensile property analysis. The mechanical recycling of virgin PLA led to significant discoloration of the polymer, indicating degradation during the thermal processing of the polymer due to the formation of chromatophores in the structure. Differential scanning calorimetry (DSC) analysis revealed an increase in glass transition temperature (Tg) with respect to increased recycling steps, indicating an increased content of crystallinity in the PLA. Impact strength testing showed no significant detrimental effects on the NFRCs’ impact strength up to six recycling steps. Tensile testing of PLA/HNT NFRCs likewise did not show major decreases in values when tested. However, PLA/BF NFRCs exhibited a significant decrease in tensile properties after three recycling steps, likely due to a reduction in fiber length beyond the critical fiber length. Scanning electron microscopy (SEM) of the fracture surface of impact specimens revealed a decrease in fiber length with respect to increased recycling steps, as well as poor interfacial adhesion between BF and PLA. This study presents a promising initial view into the mechanical recyclability of PLA-based composites.
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8

Lou, Xi Yin. "Research on Mobile Mechanical Products of Recycling Method." Advanced Materials Research 1037 (October 2014): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.91.

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How to make discarded mobile mechanical product implement material and components reuse and recycling economical in its all 1ife was the focus of green design. Aiming at the problems of the traditional design which is not considering recycling resources and the influences to the environment after the end of life of the productions, the concept and content of green design for recycling was introduced, in addition, the tactic of green design for recycling was included. At last, the method of realizing the mobile mechanical productions recycling is pointed out.
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9

Luu, Duc-Nam, Magali Barbaroux, Gaelle Dorez, et al. "Recycling of Post-Use Bioprocessing Plastic Containers—Mechanical Recycling Technical Feasibility." Sustainability 14, no. 23 (2022): 15557. http://dx.doi.org/10.3390/su142315557.

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Most of the plastic-based solutions used in bio-manufacturing are today incinerated after use, even the not “bio-contaminated”. Bioprocessing bags used for media and buffer preparation and storage represent the largest amount today. The aim of this work was to technically assess the feasibility of the mechanical recycling of bioprocessing bags. Materials from different sorting and recycling strategies have been characterized, for their suitability of further use. Quantitative physical and mechanical tests and analysis (FTIR, DSC, TGA, density, MFI, color, tensile, flexural, and Charpy choc) were performed. The data show that these recycled plastics could be oriented towards second use requiring physical properties similar to equivalent virgin materials. A comparative life cycle assessment, based on a theoretical framework, shows that mechanical recycling for end of life presents the advantage of keeping material in the loop, without showing a significant statistical difference compared to incineration with regards to the climate change indicator.
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10

La Mantia, Francesco Paolo. "Polymer Mechanical Recycling: Downcycling or Upcycling?" Progress in Rubber, Plastics and Recycling Technology 20, no. 1 (2004): 11–24. http://dx.doi.org/10.1177/147776060402000102.

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