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Manufacture of bio-based hotmelt adhesives based on polysaccharides and their application in paper and board packagings (BioGlyk)

The packaging market in Germany is a continuously growing market in which paper products play a key role. The requirement of having a full-scale ecologically reasonable alternative to plastic packagings, inclusive of adhesives, can be fulfilled by a hotmelt that is based on renewable raw materials. Previous attempts always failed because of low thermal stabilities and harmful substances. Especially for small and medium enterprises (SME) with a lesser degree of technical equipment, this has so far been a critical obstacle to market access. To this end, PTS entered into cooperation with the Leibniz Institute for Polymer Research (IPF) as of 01/04/2021 for the IGF project “BioGlyk”.

Project title: » Manufacture of bio-based hotmelt adhesives based on polysaccharides and their application in paper and board packagings

Project period: » 01/04/2021 – 30/09/2023

Project type/sponsor: » IGF project 21788 BG

Research locations: » Papiertechnische Stiftung, PTS Heidenau, Birgit Kießler / Dr. Alexander Feldner

» Leibniz-Institut für Polymerforschung Dresden e.V., Dr. Dana Schwarz

The planned research project is aimed at producing a thermostable hotmelt adhesive for paper and board packaging while replacing fossil resources by bio-based components on the basis of polysaccharides. Comprehensive characterisations of both the individual components and the interacting mechanisms in the compound form the basis for an optimally matched adhesive formulation.

The hotmelt adhesive is intended for application in packaging products that can also be used in the food sector. The basis polymer will be a starch ester made by reactive extrusion. Additional starch is also intended to be introduced in the hotmelt as a functional filler with colloidal starch particles of variable size. Furthermore, the starch particles can be functionalised as needed, e.g. through a protective coating against excessively high thermal loads. The results are to be compared with the use of thermoplastic starch. The hotmelt formulation such developed is planned to be produced on a kilogramme scale for application testing.

Thanks to the ecological research approach to making consumer goods and packaging products from holistic bio-based materials, good market entry opportunities are expected especially for SMEs to launch new hotmelt adhesives.

Birgit Kießler,