gerLöcken, HenningGries, ThomasFischedick, ManfredEtablierung eines Leitfadens zur Entwicklung und Bewertung der Eignung nachhaltiger Werkstoffe für den industriellen Einsatz in der Textiltechnikinfo:eu-repo/classification/ddc/620To reduce greenhouse gas emissions from the textile industry, the European Commission has published the EU Strategy for Sustainable and Circular Textiles. In addition to establishing a circular economy, the objectives of this strategy are to transform the textile sector from finite and environmentally harmful materials to renewable and environmentally friendly materials. In particular, the production of melt-spun multifilament yarns based on bio-based, thermoplastic polymers is being considered in many development projects but is not yet being used across the board. There is often a lack of transparent evaluation of the development and scaling potential of using a bio-based material. In addition, a comparison of possible alternatives is often not readily possible, as the necessary analyses are carried out with different assumptions and observation frameworks. In order to systematically assess the suitability of these bio-based multifilament yarns, a guideline is developed in this thesis. For the development of the guideline, methods of product, process and economic evaluation as well as the life cycle assessment according to DIN EN ISO 14040/14044 are structured in a five-stage development process and relevant tests for the development of thermoplastic multifilament yarns are presented. Within the guideline, the technical, ecological and economic potential is determined in relation to a potential industrial process. The application of the guideline is shown in two development projects. In the first development project, the selection of commercially available bio-based polymers is analysed. Five (partially) bio-based polyamides from different manufacturers are identified and the development stages of the Eco.Yarn Guideline are run through. In the second development project, the Eco.Yarn Guideline is used to analyse the potential of multifilament yarns based on microalgae. The ecological and economic analysis of the technology potential does not reveal any positive potential for the use of bio-based multifilament yarns based on microalgae, even in very optimistic scenarios.Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen (2025). doi:10.18154/RWTH-2026-00668 = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionRWTH Aachen University2025info:eu-repo/semantics/openAccessDEhttps://publications.rwth-aachen.de/record/1026113https://publications.rwth-aachen.de/search?p=id:%22RWTH-2026-00668%22StudentsStudent Financial Aid ProvidersTeachersResearchersinfo:eu-repo/semantics/altIdentifier/doi/10.18154/RWTH-2026-00668