Does Disposable nappies have microplastics?
The short answer
A disposable nappy is mostly plastic — a polypropylene top sheet against the skin, a polyethylene backing, and a core of superabsorbent polymer. It is worn continuously, against the most sensitive skin there is, for the first years of life.
Why Disposable nappies scores 42
Continuous 24-hour skin contact with a synthetic non-woven, for years
Warm and moist conditions, which is the worst environment for any polymer-skin interface
Movement means constant low-level abrasion between fabric and skin
"Eco" nappies usually swap the outer layer for a plant-based film and keep the synthetic core
Where the 42 comes from
Five components, added. The page renders the parts rather than a stored total, so the number cannot disagree with the reasoning behind it.
- Packaging contact
- 18 / 30
- Use conditions
- 12 / 25
- Measured release
- 6 / 25
- Polymer behaviour
- 6 / 10
- Processing
- 0 / 10
What material touches the contents, over how much surface area, for how long. Glass and steel score near zero here; a film pressed against fatty food scores near the top.
Heat, abrasion, flexing, repeated opening, reuse beyond design life. The same bottle scores differently in a fridge and in a hot car.
What a laboratory actually counted, for this product or its category. A high number here means real particles were measured, not that the material looks suspicious.
How this specific polymer behaves — brittleness, fat solubility of its additives, thermal stability, whether it is a polymer named in existing restrictions.
What happened before you bought it. Retort sterilisation inside the pack, hot-filling, and pressurised brewing all happen at the most migration-favourable moment.
What we don't know
Not measured. As with wipes, the published concern is chemical rather than particulate, and the particle question has simply not been asked. We are not going to invent a number for a product used on infants — grade D says exactly what we know, which is the materials and nothing else.
This section is on every page in the database, including the ones where the answer is comfortable. How evidence grades work →
Better options
Ordered by how much they change, not by how much they cost.
Cloth nappies
a real commitment, and the only option with no synthetic layer at all
Check what "eco" actually changed
usually the outer film, rarely the core or top sheet
Change frequently regardless
good advice for reasons that long predate this question
Check the one in your kitchen
This page scores Disposable nappies as a product. Formulations, packaging and suppliers change, and the specific item you own has its own condition — a scratched pan and a new one are not the same object. Scan yours for a score built from what is actually in front of you.
Scan my personal careSources behind this score
Each with the finding we use it for and the limitation that finding carries — because a study quoted without its boundaries is how this subject got so noisy.
- peer-reviewed2019
De Falco 2019 — Found that simply wearing polyester garments released microfibres to air at a rate comparable to, and in some cases exceeding, what the same garments released to water during laundering.
Limitation: A small number of garment types under controlled movement. It is the study that opened the air pathway rather than one that quantifies a household dose.
- peer-reviewed2022
Zangmeister 2022 (NIST) — Nylon bags, LDPE food-storage bags and similar single-use plastics shed trillions of sub-100 nm particles per litre in ordinary contact with water.
Limitation: Deionised water at controlled temperature. Nanoparticle counts are inherently large numbers; the study is about their existence and quantity, not their fate in the body.
- peer-reviewed2020
Li 2020 (Nature Food) — Polypropylene infant bottles prepared to WHO sterilisation guidance released 1.3–16.2 million microplastic particles per litre of formula.
Limitation: Release scaled with water temperature — the highest numbers came from the 70°C step WHO recommends for killing bacteria. The study explicitly did not recommend abandoning that step, and no health outcome was measured.
Frequently Asked Questions
Does Disposable nappies have microplastics?
How was the Disposable nappies score of 42 calculated?
Is Disposable nappies safe?
Why is the confidence only 46%?
Scored next to this
Baby wipes
Polyester or polypropylene non-woven fabric
Grade D · 46%
Period products with plastic components
Polypropylene applicators, polyethylene backing sheets, synthetic top layers
Grade D · 45%
Polypropylene baby bottle
Polypropylene (#5) bottle with a silicone teat
Grade A · 90%