Publicação
Technical yarns containing recycled fibers from pre-consumer textile residues
| Resumo: | The textile industry is widely recognized as one of the world's most polluting industries. It produces a considerable amount of waste, including residual waste from the manufacturing process itself, as well as waste resulting from the utilization of products by consumers and industrial waste from production activities (i.e. post-industrial and pre- and post-consumer waste). In the specific case of the post-industrial residues, there is the possibility of their reintroduction into the production process, based on their form and properties. However, it is not possible for pre- and post-consumer residues to be reintroduced directly into the factory line, due to the structure of these materials. Consequently, methodologies must be applied to convert these residues into raw materials, which can then be used to produce new products. These methodologies include mechanical, chemical and biological processes. Regarding all the technologies in question, mechanical recycling has been demonstrated to be the most scalable and cost-effective solution for industry. However, this process is accompanied by several disadvantages. These include a reduction in the length of the fibers, which has a detrimental effect on the final properties of the yarns. To mitigate the disadvantages, it is necessary to optimize the parameters of the shredding machine. In this work, viscose flame-retardant and meta-aramid technical garments, supplied by FDG - Fiação Da Graça, S.A., were submitted to an optimization of the shredded process to obtain longer fibers. In this process, the length of the fiber was identified as the key parameter to produce higher quality yarns. The yarns were produced on a laboratory spinning line, in which the linear density of the silvers and from the final yarns were evaluated by adjusting the draft and torsion in the ring spinning machine. The measurement of the recycled fibers was conducted utilizing the ImageJ software. The evaluation of the yarns was carried out with a focus on their unevenness (Uster) and the mechanical properties. The production of knitted fabrics was performed with a view to conducting an evaluation of their flame resistance. |
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| Autores principais: | Azevedo, Tiago Jorge Mendonça Pinto |
| Outros Autores: | Silva, Ana Catarina; Brás, Duarte Rodrigues; Guimarães, Renato Filipe Costa Rodrigues; Ferreira, Diana P.; Fangueiro, Raúl |
| Assunto: | Engenharia e Tecnologia::Outras Engenharias e Tecnologias |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | outro |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | The textile industry is widely recognized as one of the world's most polluting industries. It produces a considerable amount of waste, including residual waste from the manufacturing process itself, as well as waste resulting from the utilization of products by consumers and industrial waste from production activities (i.e. post-industrial and pre- and post-consumer waste). In the specific case of the post-industrial residues, there is the possibility of their reintroduction into the production process, based on their form and properties. However, it is not possible for pre- and post-consumer residues to be reintroduced directly into the factory line, due to the structure of these materials. Consequently, methodologies must be applied to convert these residues into raw materials, which can then be used to produce new products. These methodologies include mechanical, chemical and biological processes. Regarding all the technologies in question, mechanical recycling has been demonstrated to be the most scalable and cost-effective solution for industry. However, this process is accompanied by several disadvantages. These include a reduction in the length of the fibers, which has a detrimental effect on the final properties of the yarns. To mitigate the disadvantages, it is necessary to optimize the parameters of the shredding machine. In this work, viscose flame-retardant and meta-aramid technical garments, supplied by FDG - Fiação Da Graça, S.A., were submitted to an optimization of the shredded process to obtain longer fibers. In this process, the length of the fiber was identified as the key parameter to produce higher quality yarns. The yarns were produced on a laboratory spinning line, in which the linear density of the silvers and from the final yarns were evaluated by adjusting the draft and torsion in the ring spinning machine. The measurement of the recycled fibers was conducted utilizing the ImageJ software. The evaluation of the yarns was carried out with a focus on their unevenness (Uster) and the mechanical properties. The production of knitted fabrics was performed with a view to conducting an evaluation of their flame resistance. |
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