Sustainable Polyester Packaging Materials Show Promise

Strategic Insights -

Researchers at the Fraunhofer Institute for Process Engineering and Packaging have made a significant discovery in the field of sustainability research. According to their study, polyethylene furanoate (PEF) and Tritan copolyester are sustainable polyester polymers, offering a promising alternative to fossil-based polyethylene terephthalate (PET) in food packaging. The research found that PEF and Tritan have lower diffusion rates than PET and polyethylene naphthalate (PEN), making them safer for use in food contact articles.

Key Takeaways:

  • PEF and Tritan are sustainable polyester polymers made from biobased resources, offering a promising alternative to fossil-based PET in food packaging.
  • The research found that PEF and Tritan have lower diffusion rates than PET and PEN, making them safer for use in food contact articles.
  • Prediction of migration can be used as an alternative to complex and time-consuming experimental migration measurements for PEF and Tritan.
  • The modeling parameters for PEF and Tritan were determined in this study from experimentally determined diffusion coefficients and activation energies.
  • PEF shows the lowest diffusion of the four polyester polymers investigated, followed by PEN, PET, and Tritan.
  • The overall results of the study show that the investigated polyesters are low-diffusivity polymers.

Statistics:

  • 4 polyester polymers were investigated in the study: PEF, Tritan, PET, and PEN.
  • PEF and Tritan have lower diffusion rates than PET and PEN, with PEF showing the lowest diffusion rate of the four polymers.
  • The study used experimentally determined diffusion coefficients and activation energies to determine the modeling parameters for PEF and Tritan.
  • The research found that PEF and Tritan can be used as safer alternatives to PET and PEN in food contact articles due to their lower diffusion rates.

Sources:

  • Diffusion Behavior of Polyethylene Furanoate (PEF) and Tritan as Sustainable Polyester Packaging Materials. Polymers, 2025;17(19):2674.
  • Polymers can be contacted at: Mdpi, St Alban-Anlage 66, Ch-4052 Basel, Switzerland.
  • Fraunhofer Institute for Process Engineering and Packaging can be contacted at: Frank Welle, Giggenhauser Straße 35, 85354 Freising, Germany.
  • Mdpi, St Alban-Anlage 66, Ch-4052 Basel, Switzerland.