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...
As the life expectancy of the population increases, the quantity of solid waste produced has also risen. There is therefore a clear need to recycle materials, particularly polymers, and it is very important to reduce the time taken for materials to degrade after they have been discarded. The objective of this study was to develop a composite material from a mixture of waste drug packaging made from HDPE and fiber from the pseudostems of banana plants. A series of experiments were conducted to determine the characteristics of this compound, including tests of its mechanical properties, analyses with scanning electron microscopy and infrared spectroscopy, and tests of biodegradability and ecotoxicity. The infrared analysis showed that the compound was free from chemical groups that could indicate contamination by medications. The biodegradability assessment showed that the HDPERC5 compound took 28% less time to degrade after use was than the postconsumer HDPE (HDPER). The HDPERC5 compound exhibited the best results for possible use for production of domestic utilities, in addition to a shorter degradation time if its final disposal destination were to be a landfill.
The high need for polymeric materials and the availability of agro-industrial wastes, such as the rice production chain, demand the development of technologies to obtain polymeric composites based on these waste materials. Therefore, this work aims to develop materials using low density polyethylene (LDPE) as a polymer matrix and rice husk or rice husk ash, prepared by micronization in a whirlwind mill, as reinforcing fillers. The processing was carried out by injection molding, with formulations containing 20%, 30% and 40% of the filler. Tensile strength, hardness and water absorption properties were evaluated. The tensile strength of composites containing rice husk ash was higher than the same parameter for composites containing rice husk as filler. The highest tensile strength of 9.26 N/mm² was found for the material containing 20% of rice husk ash. The shore D hardness of materials containing rice husk ash was slightly higher. Regarding water absorption, the composites containing rice husk ash were those with lower absorption and all developed materials presented water absorption below 1.1%. Based on the results, we concluded that the composites have potential properties for the manufacture of polymeric consumer goods.
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