To this end, suitable yarns and textiles will be developed that are made entirely from bio-based PLA. The PLA will be produced in two ways along the entire process chain: 1. by synthesising PLA using new, non-toxic catalysts and 2. as recyclate from textile PLA waste. The project will initially develop spinning processes for multifilament yarns made from commercially available PLA, which can then be processed into cleaning textiles. Thermomechanical recycling processes are being developed for these cleaning cloths with the aim of recycling them into regranulates. The resulting regranulate is processed into multifilament yarns. These are then developed into new cleaning textiles. At the same time, chemically recycled PLA is being spun and analysed and evaluated with regard to its suitability and processing into cleaning cloths.