The circular economy is a key building block for a sustainable future. This is precisely where the “TechCirclePolymers” technology transfer project of the Institute for Circular Economy of Bio:Polymers (ibp) at Hof University of Applied Sciences comes in: It aims to improve the recycling of plastics and biopolymers. The aim is to reduce greenhouse gas emissions and replace fossil raw materials with natural alternatives. A particular focus is on increasing recyclability and extending the service life of products.
The research work, which consists of several sub-projects led by Prof. Dr. Michael Nase and has been running since 2023 and will continue until the end of 2026, aims to create innovative solutions for the economy and the environment. “Our aim is to use innovative research to develop sustainable materials that benefit the environment and the economy in equal measure,” say the two coordinating scientists Isabell Kleiber and Christin Baumgart.
BioKrümmelKleie – using bakery waste as a raw material
One example of the successful combination of sustainability and innovation is the “BioKrümmelKleie” sub-project. Here, bakery waste such as bran and crumbs are incorporated into bioplastics in order to manufacture new products such as plant pots using injection molding. The products, which can be used in garden centers and forestry, are not only biodegradable, but can also serve as water reservoirs for plants, reducing the need for watering. The cooperation with Fickenschers Backhaus GmbH and BKW Kunststoff GmbH shows how the circular economy can be implemented in practice. Initial tests have shown that the material slowly decomposes under natural conditions and thus contributes to waste prevention – meaning that the corresponding plant pots no longer need to be dug up or disposed of.
BioCaps – sustainable screw caps made from bioplastics
The “BioCaps” sub-project also focuses on sustainable alternatives: instead of conventional polypropylene, a bio-based plastic is being developed for screw caps. Special additives are used to optimize the material in order to guarantee the quality and functionality of the caps. For example, the aroma of the food is retained and the material can be recycled. The collaboration with Klett Kunststofftechnik shows that resource-saving solutions can also be economically attractive. Work is also underway to further improve the service life of the closures and make their production as energy-efficient as possible.
RecycleBra – foam recycling for new products
The “RecycleBra” project is taking a new approach to PU foam waste. Instead of disposing of them, they are shredded and processed into new foam sheets. Innovative adhesives make it possible to bond the particles together again, creating stable and flexible materials. Different degrees of hardness and flexibility can be achieved by adjusting the adhesive mixture. This method saves resources, reduces waste and opens up new possibilities for the recycling of foam products.
CO2 Reduction – low-emission protective films
The “CO2 Reduction” project contributes to the reduction of carbon dioxide emissions. Here, a new, solvent-free adhesive layer is being developed for self-adhesive protective films that are used for window frames. The targeted direct application to the carrier film saves material and significantly reduces the ecological footprint. The results of this project, which was developed in collaboration with jura-plast GmbH, are now being further optimized. In addition, tests were carried out to determine how well the protective film can be recycled in order to consistently pursue the circular economy concept. The result is a resource-saving alternative to conventional protective films.
Eco Straw – reusable straws made from bakery waste
Everyday products can also be made more sustainable: In the “Eco Straw” sub-project (as in the first sub-project), bread and bread roll crumbs are used as fillers for biopolymers to develop long-lasting reusable straws. Antibacterial and other additives improve hygiene and make the straws water-resistant and dishwasher-safe. Tests are already showing promising results in terms of their resistance to germs and mold. Work is also underway to optimize the material composition in order to ensure that the straws last as long as possible.
BioAnalytic – optimization of bio-based plastics
The “BioAnalytic” project is dedicated to optimizing thermoplastic starch (TPS), an inexpensive bioplastic that is, however, susceptible to moisture and changes in shape. By combining it with polybutylene succinate (PBS) and targeted additives, a more durable alternative is to be created. Extensive analyses are being carried out in collaboration with the company NETZSCH, the results of which will be summarized in an e-book. The aim is to provide companies with well-founded information on the processing and properties of sustainable plastics in order to promote their use.
BioCurlers – environmentally friendly curlers with a care effect
There are also sustainable innovations for the service industry: The “BioCurlers” sub-project is developing environmentally friendly hair curlers made from polylactide. This type of plastic replaces the polyethylene previously used and thus reduces the use of fossil raw materials. In addition, ingredients such as vegetable oils or cinnamon can be incorporated into the material to protect and care for the hair during use. The new curlers should not only be more sustainable, but also ensure smoother and healthier hair.
Image: Hof University of Applied Sciences;
With these projects, “TechCirclePolymers” is making an important contribution to the sustainable plastics industry and demonstrating that innovation and environmental protection go hand in hand. The technology transfer is aimed in particular at small and medium-sized enterprises in structurally weak areas. The first four sub-projects have already been completed.
Funding
“TechCirclePolymers” is a technology transfer program funded by the European Regional Development Fund (ERDF) of the European Union and supported by the Bavarian State Ministry of Economic Affairs, Regional Development and Energy and the Upper Franconia Foundation .
Project partners
BKW Kunststoff GmbH, Erich NETZSCH B.V. & Co. holding KG, Fickenschers Backhaus GmbH,
jura-plast GmbH, Klett Kunststofftechnik GmbH & Co. KG, KomRec-ReCond GmbH, Muehlmeier Bodyshaping GmbH, Stöhr GmbH & Co. KG, H. N. Zapf GmbH & Co. KG;
