Nano-shield Coating for Paper Food Packaging


NAMI has developed an eco-friendly nano-shield coating to substitute perfluoroalkyl and polyfluoroalkyl substances (PFAS) in paper based food packaging.

  • Nano-shield Coating for Paper Food Packaging 0
  • Nano-shield Coating for Paper Food Packaging 1
  • Nano-shield Coating for Paper Food Packaging 2
Commercialisation opportunities
Non-exclusive licensing
Problem addressed

PFAS are usually mixed with paper pulp or coated on paper to provide water and oil resistance for paper food packaging. However, PFAS is non-biodegradable. It is bioaccumulative and toxic to animals and human. NAMI has developed a fluorine-free hydrophobic/oleophobic nano-shield coating which can be used as a PFAS substitute for paper based food packaging.

  • NAMI’s nano-shield coating is a liquid solution developed through the composition optimization of modified hydrophobic biodegradable polymer and nanoparticles, which are well dispersed and interact with each other to form cross-linking bonding to prevent the spread and penetration of water and oil on paper.
Key impact
  • Biodegradable and recyclable
  • Compatible with existing manufacturing processes
  • Stable in both acidic and basic conditions with excellent water and oil resistance, suitable for packaging of a variety of foods
  • Minimal changes to physical appearance and property of paper
  • Silver Medal at the “2022 Geneva International Exhibition of Inventions”
  • Paper wrappers, bags, containers, cardboards, etc.
Nano and Advanced Materials Institute (NAMI)

As a Materials Expert, Nano and Advanced Materials Institute (NAMI) has a strong portfolio of innovative technologies to support and collaborate with the industry, offering frontier-applied research on advanced materials as well as technology transfer for commercialization success.

NAMI, incorporated in 2006, is designated by the Innovation and Technology Commission of the Hong Kong Government as a Research and Development Center for nanotechnology and advanced materials. NAMI undertakes and provides support for market-driven research in nanotechnology and advanced materials, and strives for commercialization of the technologies to benefit the industry and the society at large, as well as re-industrialization to promote the economic growth and sustainability of Hong Kong.