Recycling
Mechanical and chemical recycling of textiles.
What really happens at this stage
Mechanical recycling shreds textile waste, whether pre-consumer cutting scrap or post-consumer garments, back into fibre form that can be respun into new yarn, typically blended with 50-80% virgin fibre because the shredding process significantly shortens fibre length. Sorting before shredding is critical, since fibre content, colour and the presence of trims, buttons or zippers all affect the quality of the recycled output, and mixed-fibre blends such as polycotton are markedly harder to process than single-fibre garments. Chemical recycling instead breaks fibres down at a molecular level, most commonly demonstrated for polyester and cellulosic fibres, aiming to produce a feedstock closer in quality to virgin material, though the technology, capacity and economics vary significantly by fibre type and by region, and recovery of both fibres from polycotton blends remains a commercial bottleneck.
Feedstock quality is the practical bottleneck for both routes: garments with mixed fibre content, heavy trims, dark or non-uniform dyeing, or contamination from stains and non-textile material reduce the yield and quality achievable from either process. This is why design choices made years earlier, such as fibre selection and how easily trims can be removed, directly determine whether a garment can realistically be recycled at end of life. Buyers and regulators in various markets are placing growing emphasis on recyclability and recycled content, so brands should treat these as market expectations and, where applicable, requirements under local law, rather than assume a uniform global standard applies.
How it is done
- 1Sort incoming textile waste by fibre and colour
Separate single-fibre garments from blends and group by colour family, since near-infrared sorting technology works best on clean, dry, single-layer items and can be limited by dark pigments.
- 2Remove non-textile components
Strip zippers, buttons, elastic and heavy trims before shredding or chemical processing to protect equipment and improve output purity.
- 3Select the appropriate recycling route
Route single-fibre polyester or cellulosic streams toward chemical recycling where commercially available at scale, and mixed or lower-value streams toward mechanical recycling.
- 4Blend recycled fibre with virgin fibre as needed
Set a blend ratio, commonly in the range of 20-30% recycled content for mechanically recycled fibre, based on the yarn strength required.
- 5Verify recycled content claims
Use batch records and, where required, third-party certification to support any recycled content percentage stated to customers.
- 6Track yield and quality losses through the process
Record input weight versus usable fibre output at each stage to identify where contamination or poor sorting is reducing recovery.
Key metrics (indicative targets)
| Metric | Working target | Why it matters |
|---|---|---|
| Fibre recovery yield | Track by process and fibre type against facility baseline | Low yield indicates sorting or contamination problems reducing the economic viability of recycling. |
| Recycled content in blended yarn | Indicative 20-30% for mechanically recycled fibre, higher where chemical recycling is used | Reflects how much virgin fibre demand is genuinely displaced. |
| Sorting accuracy by fibre type | Indicative 90%+ correct classification | Misclassified input material degrades output quality and downstream processing efficiency. |
| Trim and hardware removal completeness | Indicative 95%+ of items stripped before processing | Residual hardware damages processing equipment and contaminates fibre output. |
| Verified recycled content claim accuracy | 100% of claims supported by batch or certification records | Unsupported claims create compliance and reputational risk under applicable market rules. |
Targets are indicative working ranges, not standard or legal limits.
Control points to check and sign off
- Fibre and colour sorting accuracy checked at intake against a sample audit.
- Confirmation that trims and hardware are fully removed before shredding or chemical processing.
- Blend ratio of recycled to virgin fibre recorded and verified against the target for each batch.
- Documentation retained to support any recycled content claim made to customers or regulators.
- Yield tracking maintained at each processing stage to identify recovery losses.
Common pitfalls and their consequences
- Mixing fibre types at collection without sorting, making high-quality recycling technically or economically unviable.
- Leaving zippers, buttons or heavy trims attached, damaging processing equipment and contaminating output.
- Claiming a specific recycled content percentage without batch records or certification to support it.
- Assuming chemical recycling capacity exists locally for a given fibre type when it may not be available at scale.
- Ignoring design-stage decisions on fibre blending, which locks in poor recyclability long before the garment reaches end of life.
Main activities
- In-store and online sell-through
- Returns, repair, resale and refurbishment
- Take-back and material recovery
Quality risks
- Feedstock contamination
Sustainability risks
- Chemistry
AI opportunities
- Sorting AI
Official sources
Learn the skills used at this stage
Free GarmentEd lessons with worked calculations, checklists and practice questions for the work described above.
Also relevant: Waste and Circularity Management.
Industry chapters that cover this stage
The GARMENT TECH Ed industry chapters whose lessons are applied here — each chapter has a reference page and a taught lesson you can read straight through.
- Chapter 30 · Circularity & RecyclingSustainability & CircularRead the chapter lesson
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Questions about this stage
Ask about stage 41, Recycling. No account needed — questions are published once reviewed, with the answer alongside them.
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