Plastic Recycling: Can Chemistry Close the Loop?

A PET bottle, a PE film and a multilayer pouch go into the same recycling bin - and a sorting plant treats them as three completely different problems. This video follows all three through mechanical recycling's melting-and-reshaping loop, then into the several distinct chemical routes now being built to go further: PET solvolysis and an engineered enzyme that both recover PET's actual building-block monomers, PE/PP pyrolysis that breaks mixed plastics into fragments needing heavy upgrading, and dissolution, which is physical recycling under a chemical-sounding name.

The strongest case traced here is selected PET: Eastman's methanolysis plant in Kingsport, Tennessee, which reported initial production in March 2024 at a stated capacity of 110,000 tonnes a year, and the 2020 Carbios/Toulouse Biotechnology Institute enzyme published in Nature, which achieved at least 90% PET depolymerisation in 10 hours under laboratory conditions. The harder case is mixed packaging, where pyrolysis still needs well-sorted input, heat, and oil upgrading before a cracker can supply new polymer at all.

An illustrative, clearly labelled mass-balance chain - 100 kg collected, through acceptance, intermediates and polymer conversion, to 33.6 kg of new plastic - shows how ordinary per-stage losses compound. The video is equally direct about what a recycled-content label actually counts: under the EU's own Decision 2026/1425 (adopted 30 June 2026), mass-balance accounting credits recycled content per facility, within a three-month cap, with no transfer of credits between sites - and that credited percentage is not a measurement of molecules physically present in one bottle. The EU's wider Packaging and Packaging Waste Regulation began applying on 12 August 2026, with recycled-content targets phased in for 2030 and 2040.

Every figure is on screen with its source and date.