Chemical textile-to-textile recycling has long resisted a workable solution. The technology uses chemical processes to dissolve, separate, and reconstitute fibres from blended garments, and has attracted billions in investment as the most promising answer. Brand partnerships have followed.
The underlying chemistry is genuinely impressive. In July 2024, a team at the University of Delaware led by Professor Dionisios Vlachos demonstrated a microwave-assisted chemical process that completely breaks down polyester and spandex in mixed textile waste within 15 minutes. Cotton and nylon remain intact throughout.
The team calculated that further refinement holds the potential to achieve a global textile circularity rate of 88%. Companies including Circ have already moved beyond the laboratory, producing garments with Zara using recovered polyester and lyocell.
Commercial scale is where the story changes. The most instructive case is Renewcell, the Swedish cellulose recycler that opened the world’s first industrial-scale textile-to-textile plant in 2022. H&M, Inditex, and Levi’s had all signed agreements to buy its recycled materials.
By November 2023, it recorded zero sales in a single month. It filed for bankruptcy in February 2024. The only peer-reviewed analysis of the collapse came from Professors Hervé Corvellec of Lund University and Alison Stowell of Lancaster University. Their conclusion went beyond the technology itself: “linear solutions hold the economy in a stronghold thanks to massive competitive advantages of scale, pace, costs, and attractiveness.” The technology worked. The economics did not.
Ultimately, the central obstacle is cost. Producing recycled polyester from European textile waste costs approximately 2.6 times more than virgin polyester from Asia, according to an analysis led by Systemiq’s Sophie Herrmann, who produced the first detailed cost comparison of its kind.
Because of this gap, industry forecasts projecting a viable recycling future are “akin to fiction,” says Ken Pucker, the former Timberland COO who now teaches at Tufts University’s Fletcher School. “Brands will continue to default to virgin fabrics as long as recycled fabrics are far more costly,” he explains. Lutz Walter, who leads the EU’s European Technology Platform for the Future of Textiles, is equally direct: “There is absolutely no way that textile-to-textile recycling will grow meaningfully over the next years, if the current comparative economics of virgin vs. recycled fibres persist.”
Then there is the problem of feedstock. Chemical recycling requires clean, sorted input in large and consistent volumes — post-consumer textile waste is the opposite. Brooke Roberts-Islam, an investigative fashion technology journalist who visited Renewcell’s facility, identified a question no developer has adequately answered: recycling plants are being built in Europe and the US, while the most consistent waste streams sit in Southeast Asian manufacturing hubs.
The geographic mismatch runs deeper still. Vlachos’s paper noted that certain dyes and flame retardants are “detrimental to this process” — a pre-removal requirement that adds cost and complexity. Research by Dr Taylor Brydges at RMIT University raises a further dimension: recycled clothing may contain more chemical residue than recycled plastic bottles. That raises a difficult question about whether developers can truly deliver “virgin-equivalent” quality without introducing new risks to the wearer.
Against this, the environmental case is more modest than developer communications suggest. IVL Swedish Environmental Research Institute modelled scaling European Union (EU) textile-to-textile recycling tenfold by 2035. Researcher Gustav Sandin Albertsson and colleagues published their life cycle assessment in the journal Sustainability in February 2025, finding an average climate impact reduction of approximately 0.5% — with an 8% probability of actually increasing climate impact under certain conditions. Sandin Albertsson’s team also found that reuse delivers significantly greater environmental benefit: the greatest environmental cost occurs during manufacture, not disposal.
Investment continues regardless. Circ has announced a €450 million commercial plant in France targeting 70,000 metric tonnes annually from 2028. Renewcell has restarted as Circulose, with production at its Ortviken plant set to resume in Q4 2026.
Syre was launched by H&M Group days after Renewcell’s bankruptcy. It claims an 85% reduction in CO2 equivalent emissions — a figure no independent life cycle assessment has yet examined.
“The technology exists, pilots are running, and policy is moving forward,” says Anna Edsberger, a researcher at RISE Research Institutes of Sweden. “Remaining challenges are profitability, maturity, business models, and collection.” Ali Harlin of VTT Technical Research Centre of Finland estimates that Europe could support at most five to ten chemical recycling plants, each requiring the output of approximately ten mechanical recycling facilities to supply adequate feedstock.
The gap between these figures and developer claims of industry-defining tipping points is considerable. What remains unresolved is not the chemistry — it is whether a market that has never priced the cost of textile waste will ever make circular economics viable.
