Unilever has pioneered the use of a new detectable black pigment for its High Density Polyethelyne (HDPE) bottles for its leading brands, TRESemmé and Lynx, so they can be detected by recycling plant scanners and sorted for recycling.
This means that around a further 2,500 tonnes of plastic bottles could now potentially be sorted and sent for recycling each year – equivalent to the weight of 200 London buses, or 1,250 family-sized cars.
The new detectable bottles will be phased in during 2019 and will allow Unilever to further ‘close the loop’ and include the recycled black plastic back in new packaging. In 2019, TRESemmé and Lynx will both introduce a minimum of 30% recycled material into their packs.
Currently ‘standard’ black plastic bottles go undetected by the automatic optical sorting machines in recycling plants because they use near infra-red light, which is absorbed by the ‘carbon black’ pigment traditionally used to colour them. This effectively makes them invisible to the sorter and leads to them being rejected and sent for waste.
Sebastian Munden, General Manager of Unilever UKI, said: “We’ve been working on a solution for black plastic for some time, and this move to using detectable black plastic in our TRESemmé and Lynx bottles means we will potentially be removing around 2,500 tonnes of plastic from the waste stream.
Unilever has carried out extensive trials, in partnership with RECOUP and waste management partners Veolia, SUEZ, Viridor and TOMRA, which have proven that this new pigment can be technically detected within their material recycling facilities in the UK.
The knowledge and expertise from developing this technical solution for detectable black bottles will be made accessible to others in the industry, as well as to other markets globally. We will be pleased to share our work and the insights generated with other manufacturers to enable wide use of this technology and approach.
Unilever’s solution will enable TRESemmé and Lynx bottles to be detected by recycling scanners, with minor adjustments at the material recycling facilities, so they can be technically separated, sorted and sent for recycling, becoming a useful resource rather than ending up as waste.
This move to using the new detectable black plastic is part of Unilever UK’s commitment to The UK Plastics Pact and its new ‘Get Plastic Wise’ campaign, a Five Point Plastics Plan which aims to tackle plastic waste in the UK and move towards a closed loop where plastic stays within the plastic economy, not the environment.
Sebastian Munden, General Manager of Unilever UKI, said: “We’ve been working on a solution for black plastic for some time, and this move to using detectable black plastic in our TRESemmé and Lynx bottles means we will potentially be removing around 2,500 tonnes of plastic from the waste stream.
“Unilever has committed to ensuring that, globally, all of our plastic packaging is fully reusable, recyclable or compostable by 2025, and to using more recycled plastic content in our packaging. For the UK & Ireland we want to significantly accelerate this and we’re proud our innovation will help us towards achieving our aim, as well as making a significant contribution towards the UK Plastics Pact targets. We’d like to thank our industry partners for their part in working with us to make this possible.”
