To respond to consumer demand and tackle plastic waste, Unilever’s R&D teams are working to develop solutions to keep plastics in the circular economy alongside finding new materials to replace virgin single-use plastic.
Unilever said a circular economy only works if the food packaging, after its intended use, returns into the economy for use as food packaging again.
However, it mentioned that there is currently no uniform legislative framework in place for the use of recycled plastics in food packaging.
“So, while demand for recycled plastic is set to grow, we need clear and consistent legislation with industry support to scale up and supply food-grade recycled plastic. Presently, there is not enough supply of recycled plastics to meet the needs for use as food packaging,” Unilever foods and refreshment packaging capability director Sanjeev Das said.
With the limited availability of food-grade recycled plastics, especially food-grade recycled polypropylene (rPP) and polyethylene (rPE) plastics which account for 75 per cent of the plastics used in Unilever’s food packaging, the company’s foods and refreshment R&D team has created sustainable sources using two complementary routes.
The first is mechanical recycling which sees items sorted according to their material.
For example, polyethylene terephthalate (PET) plastic used to make plastic bottles is sorted into one recycling stream, polyethylene (PE) used to make plastic bags into another.
Once separated, they’re cleaned and transformed into recycled raw material to make new items. For example, all of its Hellmann’s plastics bottles and jars in the US and Canada are made from 100 per cent recycled and recyclable plastic that’s been recovered this way.
The second way that it is increasing the supply of recycled plastic is through advanced recycling. This sees mixed plastic waste broken down into its fundamental building blocks and reconstructed to make new plastic packaging that’s especially suitable for food-grade packaging.
Working with its partner SABIC, Unilever uses this technology to provide ready access to food-grade recycled polypropylene plastic to make its 30 million Magnum pint tubs sold throughout Europe, Australia and New Zealand.
“To aid the circular transformation of food packaging, there is an urgent need for alignment on goals and related policies. This would enable further investments in collection, sorting and recycling infrastructure and technologies, including mechanical and advanced recycling,” Das added.
“It’s only with a common policy framework and industry collaboration that we can begin to make real progress in creating sustainable supplies of food-grade recycled plastic and the scale to meet increasing demand.
“The more others come on board and seek to tackle this together, the bigger the impact we can have to help us achieve our vision of a waste-free world.”