Food & Drink / Compounds / Nylon microfibers (polyamide microplastics)

Nylon microfibers (polyamide microplastics) in food: ingestion safety

Moderate risk

(People-specific data is limited; this page draws from human adult context.) Third most common synthetic textile fiber. Releases caprolactam (monomer, irritant) and cyclopentanone upon degradation. Higher density than PE/PP (1.14 g/cm³) — sinks in water and accumulates in sediment. Detected in human stool and lung tissue. Tea bags made from nylon mesh release billions of micro/nanoparticles per steep.

What is nylon microfibers (polyamide microplastics)?

Also known as: Nylon microfibers, Polyamide microplastics, PA-6 microfibers, PA-66 microfibers.

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Risk for people

Moderate risk

Third most common synthetic textile fiber. Releases caprolactam (monomer, irritant) and cyclopentanone upon degradation. Higher density than PE/PP (1.14 g/cm³) — sinks in water and accumulates in sediment. Detected in human stool and lung tissue. Tea bags made from nylon mesh release billions of micro/nanoparticles per steep.

Regulatory consensus

1 regulatory bodyhas classified Nylon microfibers (polyamide microplastics).

Agency	Year	Classification	Notes
EU	2023	Microplastics Regulation (EU) 2023/2055 — fishing gear and textile shedding under review

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where you encounter nylon microfibers (polyamide microplastics)

Textile
Food Contact
Fishing
Environment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Nylon microfibers (polyamide microplastics):

Econyl (regenerated nylon from ocean waste)
Trade-offs: Still sheds microfibers (same polymer). Addresses virgin material demand and ocean waste, not shedding.

Relative cost: 1.5-2×
Bio-based polyamide (castor oil-derived PA11)
Trade-offs: Lower melting point. Limited dyeability. Still not biodegradable in marine environment.

Relative cost: 2-3×

Frequently asked questions

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Sources (1)

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →