Applying an experimental design to improve the manufacturing process and properties of a novel sound absorber with recycled fibres from End-of-Life-Tyres

Abstract

The present work analyses the acoustic properties of acoustic absorbent textile products obtained from the thermo-compression of recycled End-of-Life Tyres. The objective is to obtain products of greater added value from the waste of End-of-Life Tyres, which can become a substitute for the fibrous materials currently used as acoustic absorbents. Experimental design was used to determine the number of samples to be prepared and the manufacturing conditions to maximise acoustic absorption. Five factors were taken into account: material type, temperature, time, weight and compaction factor. The obtained results demonstrate the validity of the experimental design to select the manufacturing factors in order to improve the sound absorption of these textile waste products.

The effect of the combination of multiple woven fabric and nonwoven on acoustic absorption

“…Numerical methods like multiple regression analysis have been conducted on woven fabrics [44] and design of experiments, on thermo-compressed recycled end of life tyres (ELT) [45]. In this work, design of experiments and data analysis tools are used to describe the influence of two manufacturing factors on the sound absorption coefficient of the composite material formed by a multiple cloth fabric with different configurations and a polyester nonwoven.…”