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PLA (polylactic acid) bioplastics
What it is
Polylactic acid, a compostable polymer made by fermenting starch-derived sugars into lactic acid and polymerising it. It substitutes for petrochemical plastics in packaging, food service and fibre applications
For a starch producer it is the furthest downstream step available, converting a commodity carbohydrate into a specialty polymer
Impact on industries
- Regulatory tailwind is unusually direct - single-use plastic restrictions create demand that does not depend on the customer choosing to pay more for sustainability
- Moves a starch business into polymer economics entirely, with pricing set by the plastics market rather than the maize spread
- Capital intensity and scale requirements are the barrier: PLA plants are large, technically demanding and compete against entrenched global producers with cost advantages
- Demand remains price-elastic against conventional plastics, so competitiveness depends on crude prices and on enforcement of plastic rules rather than on the product itself