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The ability to add value to waste materials from industrial operations has come to the attention of the wood processing industry, with reports, for example, of extracts from the bark tree conveying colour and UV protection to textile fibres. The objective of the present work was to expand our developments in this arena by using Copaifera langsdorffii Desf. bark extract as a natural dye for textile dyeing. A complete 2³-statistical experimental design and the central point was elaborated.The results showed that the optimal dyeing conditions were 98 °C, for 60 min, using undiluted bark extract. The dyed fabric was analysed by a spectrophotometer using the CIELAB system for evaluation of the colour strength. The results showed a K/S value of 5.78, and the dyed fabric had good colour fastness to rubbing and washing.

Artigos técnicos Equipamentos de proteção individual: o uso da norma ISO 11393-2: 1999 para ensaio em protetores de perna para uso de motosserrista.

The present research aims to present the technological evolution of sportwear production by comparing conventional and new production systems. For this, the following production systems were defined: conventional knitting (T-shirt and shoe upper), seamless knitting (T-shirt) and seamless 3D knitting (shoe upper). The definition of these objects of study was based on research that points to walking as the most practiced physical activity by Brazilians. The methodological procedure adopted in the present research is predominantly exploratory. Sportwear can be produced by the conventional process or new production processes. In the conventional production process, there are many steps for fabric manufacturing and confection. In turn, seamless technology reduces working time by creating ready-to-wear articles that require little or no sew, since the product is developed in a single process. In this way, seamless technology impacts on working time by reducing or eliminating the cut and sew operations and the amount of waste discarded. All innovations presented in this research indicate efficient production related to cost, working time, waste management and interaction with the consumer. By adopting these technologies, the textile industry begins to move towards the Fourth Industrial Revolution.

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