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The current global situation requires the efficient management of waste and the assessment of the potential for the implementation of the principles of the circular economy in order to conserve natural resources and reduce the negative impact on the environment. The aim of the research is to analyze the potential of non-woven products (mattresses) made of recycled polymer fibers, intended for use in the field of thermal insulation of buildings, in relation to their density and thickness. At the same time, the benefits obtained by combining them with products based on recycled waste and sheep wool were evaluated. The experimental results indicated good performance in terms of thermal conductivity coefficient and heat transfer resistance of the analyzed products, which can be successfully included in the category of heat-insulating materials. The correlation of thermal performance with the thickness and density of the products highlighted the need to deepen the analysis, these two parameters being insufficient for the design of such material. However, by combining mattresses made of recycled polymer fibers with mattresses made of recycled denim fibers and / or sheep wool, the benefits in terms of thermal insulation performance are obvious [ABSTRACT FROM AUTHOR]

Having in view the sustainable development context, the textile sector represents a strong pillar of the Romanian manufacturing industry, which is able to contribute to the valorisation of natural indigenous raw materials. The paper presents the results obtained through developing/ implementing a research project financed by the National Sectorial Program, coordinated by the Romanian Ministry of Research and Innovation, aiming to establish strategic solutions for capitalization of Romanian coarse wool fibres. There are emphasized the results obtained by the collaboration of three important actors from research activity and economic environment: the National Research and Development Institute for Textiles and Leather -INCDTP Bucharest, the only one R&D Institute in Romania, SC MINET SA Company, Râmnicu Vâlcea county - a representative wool manufacturing company for nonwoven materials and the Research Institute for Sheep and Goats Breeding, Palas, Constanta county, partners in the consortium coordinated by the National Research and Development Institute in Constructions, INCERC Bucharest. [ABSTRACT FROM AUTHOR]

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