Sealing behaviour of mechanically recyclable and recycled packaging materials

Workgroup: Packaging materials

Scientific Partners and Guidance:

  • Fraunhofer Einrichtung für Gießerei- Composite- und Verarbeitungstechnik IGCV, Martin Brugger
  • Fraunhofer-Institut für Verfahrenstechnik und Verpackung IVV Freising und Dresden, Dr. Martina Lindner und Mathias Kott

Financing: IVLV e. V.
Duration: 2021

The packaging law that came into effect in 2019 forces a step by step increase of material recycling of polymers. During the last 10-15 years, more and more multimaterial-multilayers were developed. However, the usage of monomaterial-multilayers is of advantage for recyclability. Such materials often contain a high content of polyolefins, which are also used as sealing layer. The sealing of packages is often done by heat contact or ultrasonic techniques. First evaluations of packaging films with recycled polymers show a disadvantageous change of mechanical performance, which lead to a hindered further processing. However, so far there is no information available concerning the effect of numerous recycling cycles on the sealability of materials with recycled content. Therefore, the effect of multiple recycling cycles on the processing properties of these packaging materials is evaluated. This information about the correlation of sealability and recycling cycles is of high interest for packaging material producers, sealing machine producers and fillers.