From the Sector

ITA Master's student Janne Warnecke investigated tension differences over the fabric width in the weaving process and thereby contributed to quality assurance; ITA Bachelor's student Jasmin Roos found a basis for the development of recyclable yarns and textiles. For these developments, they were awarded the Walter Reiners Foundation's Promotion and Sustainability Prizes on 27 November. Peter D. Dornier, Chairman of the Walter Reiners Foundation, presented the awards at the Aachen-Dresden-Denkendorf International Textile Conference (ADD-ITC) in Aachen, Germany.

Thermoplastic elastomers as a recyclable alternative to elastane
The increasing importance of a circular economy for conserving resources and minimising negative environmental impacts requires innovative recycling concepts for textiles. The increasing use of elastane poses a particular challenge in textile recycling. Even small amounts of elastane cause difficulties in established recycling technologies such as thermomechanical recycling, for example by clogging filter media or decomposing into potentially toxic degradation products.

Jasmin Roos won the Sustainability Award for her bachelor's thesis on the topic: ‘Potential of thermoplastic elastomers for thermomechanical textile recycling as an alternative to elastane: Experimental evaluation of PET/TPC blends’ with prize money of €3,000.

In her thesis, Jasmin Roos, supervised by ITA scientist Ricarda Wissel, took an in-depth look at the development of sustainable solutions for recycling elastic textiles. The innovative approach aims to replace conventional, non-recyclable elastane with melt-spun yarns made from thermoplastic copolyester elastomers (TPC). This can not only improve recyclability, but also contribute to reducing environmental impact, as harmful solvents can be dispensed with in yarn production.

The main objective of her work was to evaluate the suitability of blends of TPC and polyethylene terephthalate (PET) for joint thermomechanical recycling. Blend and melt spinning tests were carried out on a laboratory and pilot scale at the ITA facilities. Jasmin Roos succeeded in producing blends of different proportions of PET and TPC, based on typical elastane proportions in textiles, and successfully processing them into yarns on a melt spinning line – a crucial aspect for closed-loop recycling. The results of her bachelor's thesis thus form a promising basis for the development of recyclable elastic yarns and textiles.