Bioplastics

Bioplastics are a family of plastics derived from renewable biomass resources, or designed to biodegrade more readily than conventional plastics. They may be bio-based, biodegradable, or both. The term does not imply a single material or end-of-life pathway, and bioplastics sit alongside conventional petrochemical plastics in many markets.

A distinction is often made between bio-based and biodegradable. Bio-based means the material's carbon content comes from biomass rather than fossil fuels. Biodegradable means the material can be broken down by microorganisms under certain conditions. Some bioplastics (for example, PLA and PHA) are both bio-based and biodegradable; others (such as bio-based PET) are bio-based but not readily biodegradable.

Common examples include polylactic acid (PLA) from corn or sugarcane, and polyhydroxyalkanoates (PHA) produced by microorganisms. PLA is used in packaging and 3D printing and is typically industrially compostable. Other materials include starch blends, cellulose esters, and polybutylene succinate; not all are compostable, and some require specific facilities to degrade.

End-of-life options vary by material and region. Some bioplastics are designed for industrial composting, while others may be home-compostable or recycle in existing streams with limited contamination. Standards and certifications (such as EN 13432, ASTM D6400, or OK compost) guide compostability and labeling, but confusion remains in waste management systems.

Bioplastics are used in packaging, textiles, consumer electronics, and medical devices. Benefits include the use of renewable feedstocks and potential reductions in greenhouse gas emissions, but challenges include cost, feedstock competition with food crops, performance parity, and the need for appropriate waste infrastructure and clear labeling.