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Two ITA scientists awarded the Walter Reiners Foundation Prize
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.
Small tolerances, big impact: A finite element study on the fabric take-up of a weaving machine
The warp tension bow, i.e. the difference in warp yarn tension at the edge of a fabric compared to the centre of the fabric, can lead to inhomogeneous mechanical properties and thus quality losses of the fabric.
In her master's thesis on the topic of ‘Advanced Numerical Modelling of Fabric Take-up Systems: Influence of Mechanical Tolerances on the Fabric’, Janne Warnecke provided an important building block for understanding the factors that influence tension differences across the width of the fabric.
She showed that even small deviations of the take-up system rollers of 1 mm within the manufacturing tolerances can cause differences in tension values of over 600 %. These findings are particularly helpful to weaving machine manufacturers in evaluating the geometric design and tolerances of their fabric take-up systems.
To this end, Janne Warnecke used the finite element method, modelled the fabric take-up system of a weaving machine on a computer and investigated the influence of manufacturing tolerances in the system on the stress state in the fabric. What is new about her work is the modelling of the fabric take-up system at the macroscopic level with the additional integration of geometric deviations. This inclusion of manufacturing tolerances allows for a deeper understanding of geometric influences on the stress state in the fabric.
Janne Warnecke was awarded the Walter Reiners Foundation's promotion award and prize money of 3.500 € for her master's thesis.
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.
Dr Christian Boltersdorf, supervisor of Janne Warnecke's master's thesis, christian.boltersdorf@ita.rwth-aachen.de;
Ricarda Wissel, supervisor of Jasmin Roos' bachelor's thesis, ricarda.wissel@ita.rwth-aachen.de
https://www.ita.rwth-aachen.de/cms/ita/das-institut/aktuelle-meldungen/~brbrek/k...
ITA Institute Director Professor Dr Thomas Gries, Janne Warnecke, and Peter D. Dornier (from left to ...
Copyright: VDMA
ITA Institute Director Professor Dr. Thomas Gries, Jasmin Roos, and Peter D. Dornier (from left to r ...
Copyright: VDMA
The source of both images is DITF, not VDMA. We apologize for the incorrect information.
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Maschinenbau, Umwelt / Ökologie, Werkstoffwissenschaften
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