Is Tencel Lyocell Plastic-Free?
The honest chemistry, the performance trade-offs, and a straight verdict for founders deciding what their next line is actually made of.
Verdict: Plastic-free (with an asterisk)Lyocell is plastic-free in the way that matters: it is regenerated cellulose made from wood pulp, not a petroleum plastic, and it biodegrades. It is a manufactured fiber rather than a raw plant fiber, so it is semi-synthetic, but the polymer is cellulose from trees, not oil. Tencel is the branded, closed-loop version from Lenzing that recovers most of its solvent, making it the cleanest of the regenerated cellulosics.
What is Tencel Lyocell?
Lyocell is a regenerated cellulose fiber: wood pulp is dissolved and re-formed into filament. Tencel is Lenzing's brand of lyocell, made in a closed-loop process. Because the base polymer is cellulose, it sits in the same plastic-free family as cotton chemically, even though it is manufactured rather than grown into fiber form.
- Fiber type
- Regenerated cellulose (semi-synthetic, plant)
- Source
- Wood pulp (eucalyptus, beech), FSC-sourced
- Biodegradable
- Yes
- Sheds microplastics
- No (cellulosic, not plastic)
How is Tencel Lyocell made?
Wood pulp is dissolved in a non-toxic amine oxide (NMMO) solvent, extruded through spinnerets into fiber, and washed. Tencel's closed-loop system recovers roughly 99 percent of the solvent for reuse, which is what separates it from older viscose rayon whose open processing used harsher chemistry.
How does Tencel Lyocell perform?
Smooth, cool, drapey hand with strong moisture management and good wet strength for a cellulosic. It blends beautifully with cotton and wool. It is prone to fibrillation (tiny surface fibers) if finished poorly, and it is more expensive than viscose.
So, is Tencel Lyocell plastic-free?
Call it plastic-free with an asterisk. The polymer is cellulose from wood, not a petroleum thermoplastic, so it is not plastic and it biodegrades, unlike polyester or nylon. The asterisk is that it is a manufactured (semi-synthetic) fiber, so a strict definition of 'natural fiber' would exclude it even though the plastic definition does not. For anyone avoiding plastic and microplastics, lyocell qualifies.
Where you see it: Drapey tops, dresses, linings, activewear blends, and cotton-alternative jersey.
| Property | Tencel Lyocell | Polyester | Organic cotton |
|---|---|---|---|
| Polymer origin | Wood pulp (plant cellulose) | Petroleum | Plant (cotton cellulose) |
| Is it plastic? | No | Yes | No |
| Biodegradable | Yes | No | Yes |
| Sheds microplastics | No | Yes | No |
| Process note | Closed-loop solvent recovery, ~99% reclaimed | Energy-intensive, petroleum feedstock | Water-intensive farming |
The OHZEHN-TEX™ take
Lyocell is a strong plastic-free performer for drape and moisture, and it blends well. OHZEHN-TEX™ is our own bio-based performance fabric platform: bio-based nylon PA6.10 made from castor oil, with a bio-based stretch fibre made from sugarcane.
What does the research say about lyocell and microplastics?
Lyocell does shed fibers in the wash, like every fabric, but what it sheds is cellulose, not plastic, and that is the distinction the plastic-free question turns on. In a seawater degradation study (Royer et al., Science of the Total Environment, vol. 791, article 148060, 2021), wood-based cellulose fabrics including lyocell were almost completely disintegrated by day 28, while polyester swatches in the same water showed no visible change in size or thickness after 210 days. At the microfiber scale the pattern holds: in a controlled laundering and biodegradation study (Zambrano et al., Marine Pollution Bulletin, vol. 142, pp. 394 to 407, 2019), rayon and other cellulosic microfibers broke down under aerobic aquatic conditions while polyester microfibers barely degraded at all. Lyocell is the same regenerated-cellulose polymer as rayon, so its shed fibers behave the same way. DOI: 10.1016/j.scitotenv.2021.148060 · DOI: 10.1016/j.marpolbul.2019.02.062
This is also why plant-based and biodegradable are not the same promise. A later study from the same lab (Royer et al., PLOS ONE, vol. 18, issue 5, article e0284681, 2023) found cellulose textiles fully disintegrated in coastal seawater in roughly 35 days and reached 76 to 82 percent biodegradation in bioreactor tests within 28 days, while PLA, a compostable bioplastic, barely moved at around 0.2 percent under the same conditions. The practical read for a plastic-free line is narrow and real: lyocell still sheds, so it is not a license to stop caring about fiber loss, but what it sheds is a biodegradable cellulose fiber rather than a persistent microplastic, which is exactly why it earns a place as a synthetic alternative in base layers and drapey knits. DOI: 10.1371/journal.pone.0284681
Where this fiber lands in production
Tencel Lyocell shows up most in bra and sleepwear production, performance activewear sourcing, and everyday basics fabric, and the standard that governs all of it is set out at clothing manufacturer. The full definition of what counts is at plastic-free fabric.
Frequently asked questions
Is lyocell the same as viscose or rayon?
They are all regenerated cellulose, but the process differs. Viscose (rayon) uses the older, harsher carbon-disulfide process, often with open-loop chemistry. Lyocell uses a non-toxic amine-oxide solvent in a closed loop that recovers most of it. Same plastic-free base polymer, cleaner manufacturing for lyocell.
Does Tencel shed microplastics?
No. Microplastics are fragments of petroleum-based synthetic polymers. Tencel's polymer is cellulose, so what it sheds is biodegradable, not persistent plastic. That is a key reason it is chosen as a synthetic alternative in base layers.
Does lyocell biodegrade?
Yes. Because lyocell's polymer is cellulose from wood rather than petroleum plastic, its fibers break down in water and soil. In seawater trials, wood-based cellulose fabrics including lyocell disintegrated within weeks while polyester was essentially unchanged after months, which is why what lyocell sheds is a biodegradable fiber, not a persistent microplastic.