Almost everyone knows clothing should be recycled. Far fewer know that recycling a garment is genuinely hard, much harder than recycling a glass bottle or an aluminium can. The reason is in how textiles are built, and it shapes everything about how the process works.
This guide explains the textile recycling process itself, mechanical versus chemical, sorting, and why blended fabrics are the sticking point, as the engine underneath circular fashion.
What is textile recycling?
Textile recycling is the process of recovering fibre or raw material from used clothing and fabric waste so it can be made into something new, rather than sent to landfill or incineration. It is distinct from reuse or resale, which keep a garment whole; recycling breaks it back down to a material.
It splits into two families. Mechanical recycling physically pulls textiles apart into fibres. Chemical recycling breaks the material down to its polymers or building-block monomers and rebuilds it. Which one fits depends entirely on what the textile is made of, which is where the difficulty starts.
The textile recycling process, step by step
Whichever route a textile takes, the front of the process is the same, and most of the cost and effort sits there, not in the recycling itself.
- Collection: used textiles are gathered through take-back, drop-off or municipal collection, as pre-consumer production offcuts or post-consumer worn garments.
- Sorting: items are separated by fibre type, colour and condition, by hand or increasingly by near-infrared scanners that read fibre composition automatically.
- Preparation: zippers, buttons, labels and other hardware are removed, and some feedstock is de-coloured, so only fibre goes forward.
- Recycling: the prepared feedstock is processed mechanically or chemically into recovered fibre, pulp or monomers.
- Re-manufacture: the recovered material is spun into new yarn, usually blended with virgin fibre, and knitted or woven again.
Sorting is the quiet bottleneck. A recycler needs a clean, known feedstock, and post-consumer clothing arrives mixed, dirty and unlabeled. Better collection and automated sorting are where most of the industry's investment now goes.
Pre-consumer vs post-consumer textile waste
Not all textile waste is equal, and the feedstock decides how easy recycling is.
- Pre-consumer waste: offcuts and rejects from cutting and production. It is clean, of known and often single fibre, and undyed, so it is the easiest to recycle and where most fibre-to-fibre recycling happens today.
- Post-consumer waste: worn garments returned by consumers. It is mixed, dyed, blended, contaminated and unlabeled, which makes it far harder and more expensive to sort and recycle.
Most of the volume, and most of the problem, is post-consumer. A recycler that can only use clean pre-consumer scrap solves a small slice of the waste stream, which is why sorting technology for post-consumer clothing is the industry's real unlock.
Mechanical vs chemical recycling
The two routes trade quality against cost, and neither wins outright.
- Mechanical recycling: shredding, tearing and carding fibres apart with no chemistry. It is cheaper, lower energy and well established, but it shortens the fibres, by up to 40% versus virgin, so the recovered fibre is weaker and mostly downcycled or blended in small amounts.
- Chemical recycling: dissolving or depolymerising the material back to pulp, polymers or monomers, then rebuilding it. It can recover near-virgin quality and handle dyed or mixed feedstock, but it is energy and chemical intensive and still mostly at pilot or demonstration scale.
The split runs by fibre. Cotton and other cellulosics are dissolved and regenerated into new pulp; polyester is depolymerised back to its monomers; polyamide (nylon) can be depolymerised too. Mechanical recycling suits clean, single-fibre streams; chemical recycling is what unlocks the harder feedstocks, if it can scale.
The chemistry is specific. Polyester is typically depolymerised by solvolysis into ethylene glycol and terephthalic acid, the same monomers used to make virgin polyester. Cellulosics such as cotton and viscose are dissolved and re-spun into regenerated fibre, and nylon can be broken down by hydrolysis. Every route needs a fairly pure input, which is exactly what blends and contamination deny it.
Why blended fabrics are so hard to recycle
This is the heart of the problem. Most garments are not one fibre. They are blends, poly-cotton, or anything with elastane for stretch, and blends defeat most recycling.
- Mechanical recycling cannot separate them: it shreds whatever goes in, so a poly-cotton tee comes out as a poly-cotton fibre mix that is hard to re-spin into anything high value.
- Chemical recycling can split some blends, not all: poly-cotton can be separated by dissolving the cotton and recovering the polyester, but blends of three or more fibres, most commonly cotton-polyester-elastane, have no effective recycling route yet.
- Contaminants make it worse: dyes, coatings, prints, zips and buttons all have to be dealt with before or during recycling, and each one lowers yield and quality.
The emerging fix is chemical separation. For poly-cotton, one route dissolves the cotton into cellulose pulp and leaves the polyester to be recovered by filtration; another selectively depolymerises the polyester and leaves the cotton as fibre. These run at pilot scale today, but they show the direction: recover each fibre cleanly instead of shredding the blend into a low-value mix.
This is why what looks like a small design choice, adding 5% elastane for comfort, can move a garment from recyclable to effectively unrecyclable. The fabric decision made at the design desk sets the end-of-life outcome years later.
Closed-loop vs open-loop recycling
Recycling is not automatically circular. It matters whether the fibre comes back as textile or drops to a lower use.
- Closed-loop (fibre-to-fibre): old textiles become new textiles. It keeps material at its highest value, but it is still rare, and the reasons why are covered in circular fashion.
- Open-loop (downcycling): textiles become lower-value products such as insulation, mattress filling, wiping cloths or nonwovens. It diverts waste, but the material can rarely be recycled again from there.
Most textile recycling today is open-loop. Closing the loop is the goal that fibre-to-fibre technology, and the regulation now pushing recycled content, is built to reach, and the distance between downcycling and true fibre-to-fibre recovery is where the whole industry is trying to move.
Designing a garment to be recyclable
Recyclability is decided long before a garment is thrown away. A recycler can only work with what the designer specified, so a few upstream choices decide whether recycling is even possible.
- Prefer mono-materials: a garment that is one fibre, or a blend a known process can separate, is far more recyclable than a three-fibre mix.
- Carry fibre-composition data: recyclers need to know exactly what a garment is made of, which is one reason the digital product passport matters for recycling, not just compliance.
- Design for disassembly: trims, zips and mixed linings that come apart cleanly make preparation cheaper, a decision that belongs in sustainable sourcing from the start.
From recyclability to a sourcing decision
Whether a garment can be recycled is set by its fibres and construction, which are sourcing and design decisions, not waste-management ones. Apshan builds the connected, sourced read on materials and supply that informs those calls. See how it connects to virgin fibre production upstream, request access, or view the plans and pricing.