PLA
Also known as: PLA, polylactic acid, PLA film, corn-based plastic, bioplastic film, compostable film
PLA (polylactic acid) is a bio-based plastic made from plant sugars such as corn or sugarcane, compostable under industrial conditions.
PLA (polylactic acid) is a bioplastic made by fermenting and polymerising sugars from plants such as corn or sugarcane. It is both bio-based and, under the right conditions, compostable.
In flexible packaging
Oriented PLA film is clear, glossy and printable, similar in look to PET or BOPP. In compostable pouches it often forms the printed outer layer, combined with other compostable biopolymers, cellulose film or paper, plus compostable inks and adhesives.
Compostable, but not everywhere
PLA is designed to break down in industrial composting facilities with controlled heat and moisture. In home compost, soil or the sea the process is much slower or may not happen. A pack only counts as compostable once it has been tested and certified to the relevant standards. See compostable packaging and biodegradable.
Limitations
- Limited moisture and oxygen barrier
- Softens at relatively low temperatures
- Can disrupt PET or PE recycling if it ends up in those streams
- Usually more expensive than conventional films
Before switching, check whether your market has composting infrastructure. Often a recyclable mono-material pouch is the more practical choice.
Frequently asked
Does PLA break down in nature?
PLA is designed for industrial composting conditions. In soil, water or the open environment it breaks down very slowly, so it should not be littered.
Can PLA go in plastic recycling?
Generally not. Mixed into PET or PE recycling streams it can reduce the quality of recycled material.
Related terms
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