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Our patented technology blends at scale, sugar derived Biopolymers - matching the mechanical properties of PP, PE and some PS & drop into existing plastic manufacturing.
About
At Chestnut Biopolymers, we believe in nature’s intelligence. That’s why we’ve named ourselves after one of its finest champions: the Chestnut tree. In the English countryside, no other native tree grows as fast and stores as much carbon over its lifetime. It’s not just a tree—it’s a force of nature. A living engine of carbon capture. A beating heart in the fight against climate change.
Just like the tree, Chestnut Biopolymers is built to grow quickly and create lasting environmental value. We develop biodegradable, majority plant-based biopolymer formulations designed to match the strength and performance of fossil plastics—without leaving behind the legacy. Our materials are strong in use, but gentle in afterlife: designed to break down safely in the natural environment, not remaining as microplastics and nanoplastics.
Key Benefits
We work with manufacturers across sectors—from medical disposables and packaging to consumer goods—helping them replace polypropylene, polyethylene, and polystyrene with sustainable, plant-based alternatives. These bioplastics are a drop-in alternative that don’t require new machinery or retooling. This is a seamless transition to better materials, grounded in real science and real impact.
Our materials are made from renewable, carbon-sequestering feedstocks. And we measure our success not only by what we make—but by what we leave behind: nothing harmful, nothing persistent. Just a simple, cleaner solution.
As we like to say: Biodegradable Biopolymers. Made Robustly Not to Last™.
Chestnut Biopolymers is the beating heart at the centre of the drive to replace fossil plastics—the living counterpart to the Chestnut tree’s role in nature. Together, we are tackling the damage done by the fossil sector, and beginning to reverse the spread of plastic pollution, from landfills to oceans to the very air we breathe.
Applications
Every plastic product has a job to do. Whether it’s injection moulded or sheet extruded, whether it replaces polypropylene (PP), polyethylene (PE), or polystyrene (PS), it demands specific mechanical properties and processing behaviours to perform reliably. At Chestnut Biopolymers, we specialise in matching those demands—without the fossil carbon.
Using our patented formulation technology, our team in Darlington formulates bespoke biopolymer blends that mirror the strength, toughness, thermal stability, and processing of conventional plastics. We listen to our customer’s requirements and benchmark our materials against the technical data sheets for incumbent PP, PE, and PS grades, ensuring our biopolymers drop seamlessly into existing manufacturing processes.
These formulations have already been adopted by customers across multiple sectors, enabling them to launch fossil-free versions of their products—without changing their tooling, equipment, or performance expectations.
We have manufacturing partners bring replacements products made form our material in agriculture, forestry, fashion, electrical packaging and marketing activation.
we are targeting cosmetics, medical, pharma currently.
FMCG, drinks and food are on the horizon as we scale and drive our prices towards fossil parity.