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More and more electronic devices are being produced and most of them are disposed of improperly. In addition, as they contain heavy metals and toxic substances in their composition, the environmental impact increases. This work aims to study the recycling of polymers present in e-waste through the mechanical characterization of polymer blends produced with the main polymers present in printers. To do so, printers were dismounted, the material of the components was classified, and the main polymers were processed. The sample consisted of 20 printers, from which HIPS-90%/PS-10%, HIPS-90%/ ABS-10% and HIPS-100%, blends were processed by extrusion and injection of specimens with tensile test geometry. The tensile strength was 39.0 MPa for HIPS/ABS, and 37.5 MPa for HIPS/PS. Despite having slightly different mechanical properties, probably due to possible variations in their chemical composition, the formulations have good quality and potential for use in new products such as hangers, organizing boxes, soles and, watering cans.

Recycling Footwear Industry Waste and Evaluation the Deterioration in SoilAbstract: The production of footwear generates various residues, such as cotton fabric flaps and rubber chips, which are materials that have characteristics that make it difficult to recycle. Thus, the objective of this study is the mechanical recycling of these residues, obtaining blends of these residues with Capro-PU and EVA. They are processed mechanically by comminution, extrusion and pelletizing, obtaining chemically analyzed materials and subsequently submitted to the injection and lamination processes in order to observe the characteristics in the form of industrialized products. The materials were characterized by Scanning Electron Microscopy, thermogravimetric analysis and CO 2 release rate evaluation. The recycled materials were subjected to the lamination and injection processes where they were evaluated according to characteristic tests for the production of assembly insoles. By the TGA, it was possible to verify that the blends had a greater thermal stability when compared to the pure consumables. Regarding the mechanical tests, all blends were within the limits established by the PFI and showed values of CO 2 release rate higher than the values of the test only with the fabric, since this is a biodegradable material. Thus, it is observed that the present study is a breakthrough for materials processing technology, creating new products with suitable characteristics for manufacturing processes and presenting microbiological degradation capacity, when discarded in soil.Keywords: Recycling; Mechanical processing; Footwear; Solid waste; Microbiological degradation. ResumoA produção de calçados geram diversos resíduos, tais como retalhos de tecido de algodão e aparas de borracha, que são materiais que apresentam características que dificultam sua reciclagem. Assim, o objetivo deste estudo é a reciclagem mecânica destes resíduos, obtendo blendas destes resíduos com Capro-PU e EVA. Sendo processados mecanicamente por cominuição, extrusão e peletização, obtendo-se materiais analisados quimicamente e posteriormente submetidos aos processos de injeção e laminação a fim de observar as características na forma de produtos industrializados. Os materiais foram caracterizados por ensaios de Microscopia Eletrônica de Varredura, análise termogravimétrica e avaliação da taxa de liberação de CO 2. Os materiais reciclados foram submetidos aos processos de laminação e injeção onde foram avaliados de acordo com ensaios característicos para a produção de palmilhas de montagem. Pelo TGA foi possível verificar que as blendas ficaram com uma maior estabilidade térmica quando comparado aos insumos puros. Em relação aos ensaios mecânicos, todas as blendas ficaram dentro dos limites estabelecidos pelo PFI e apresentaram valores de taxa de liberação de CO 2 superiores aos valores do ensaio somente com o tecido, visto que este é um material biodegradável. Desta forma, observa-se que o presente estudo é um avanço para a tecnologia de processamento de mater...

The aim of this work was to evaluate mass loss in each stage of the recycling process for metal recovery from PCBs of controllers and temperature indicators of cold chambers. The stages of process consists of grinding, particle size classification, magnetic and electrostatic separation. It was analyzed 13 kg of PCBs. These PCBs were crushed and ground. The ground material were subjected to magnetic and electrostatic separator. The losses in the comminution stages were 12.69 % and are lower than those found in other related works that used mixtures of different types of PCBs, whereas in this work only one model plates were analyzed. 27.2 % absolute mass loss we reached out after particle size separation with Tyler Series with 1 mm sieve presents the higher mass losses in the whole process and this fraction was not processed as it results in PCBs powder dust that interferes negatively in the electrostatic separation. Comparing the losses in the stages of shredding of PCBs employed in temperature controllers with other studies involving PCBs from the automotive industry and from computers and cell phones, is remarkable that this type of board presents significantly greater potential to be processed for recovery of its materials.

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