Challenges Faced in Using Recycled Fibers for Spinning
Uster Technologies recently hosted a high-level panel bringing together spinning and textile industry leaders to discuss the challenges of producing yarn from recycled fibers. The panel highlighted the critical role of data, automation, and cross-industry collaboration in transforming sustainable spinning practices. Experts from Rieter, Säntis Textiles, Otto Yarns, and TVU shared insights into the path forward for recycled yarn production.
The consensus: spinning high-quality yarn from recycled material is no longer just about machines — it requires reimagining processes, integrating artificial intelligence, and fostering collaboration across the value chain. As companies strive to meet the demands of circularity, product consistency, and profitability, the next generation of recycling must be engineered with precision, tested rigorously, and interconnected intelligently.
Standards and Customization – Designing for Trust and Diversity
Advanced machinery enables process optimization, but truly distinctive products often require tailored engineering. Andreas Merkel, CEO of Otto Yarns, emphasized this with their in-house approach: “We create our own path by developing our own final machines.” One innovation is their Spin-Knit system, which combines spinning and knitting in a continuous process. Initially designed for cotton, it has now been adapted for technical fibers with a customized drafting system.
Producing yarn from recycled fibers differs greatly from using virgin materials. Stefan Hutter of Säntis Textiles stressed the need for new industry standards for recycled fibers, calling on Uster to lead that initiative. He noted that only with such standards and integrated quality controls will buyers trust the reliability and value of recycled yarns.
Reconfiguring Spinning for Recycled Inputs
Recycled yarn can be made using existing spinning setups, but adjustments are necessary. “Spinners must go back to the basic task and again learn how to spin,” said Michael Will, Head of Textile Technology at Rieter. The variability in recycled fibers demands extensive data collection, parameter testing, and iterative quality assurance to maintain consistency.
Additionally, the trend toward greater automation challenges traditional spinning setups. While interconnected systems limit flexibility, machine-level automation — like automatic comber nip adjustments — supports adaptation for small lots and varied material inputs.
AI and Data Are Key Enablers
AI is increasingly critical in recycling stages such as sorting, separation, and cleaning. It improves material recovery and process optimization through advanced pattern recognition. Traceability, too, has become essential to build end-user confidence. Thomas Franz from TVU emphasized, “It must be possible to trust certificates, especially for downstream processes like dyeing.”
Data becomes powerful when it’s connected. Integrating machinery with testing instruments across brands is vital for comprehensive process control and monitoring. This approach enables manufacturers to achieve uniform quality in recycled yarn and gain full value from their equipment investments.
The event concluded with a shared belief: the path forward must involve closer cooperation between technology partners. The Uster discussion marks an early yet important step toward shaping the future of circular yarn manufacturing.