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Mechanical investigations of ultrathin coatings on polymer films – towards prediction of permeability properties
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
(Tetra Pak, Packaging Solutions AB, D & E Materials & Package)
(Adhemon Sarl, Thin Technology)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Barriers, such as towards light and oxygen, are important to maintain food quality while food is stored and transported. A key of food packages is therefore to ensure the barrier function of the package material all through the different steps in the manufacturing of the food packages. Ultrathin coatings onto substrate films, such as polymer films, is one way of enhancing oxygen and water barriers in food packaging material to maintain food quality. These coatings are often brittle and tension and bending as the barrier films are incorporated in the final packing material structure can indeed affect the functionality of the oxygen transmission barrier. The limits of mechanical load before jeopardizing final barrier function is of course important to investigate, and if possible, be able to predict. In this work, we carried out mechanical investigation using fragmentation tests by in situ tensile loading in a table top scanning electron microscopy to explore the cracking of ultrathin coatings on polymer films. Adhesion and cohesive properties, such as interfacial shear and coating strength were calculated. Our efforts and latest results on going towards somewhat a holy grail of being able to make realistic predictions of oxygen barrier performance of final packages will also be discussed.

Place, publisher, year, edition, pages
South Carolina, USA, 2019.
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:uu:diva-395545OAI: oai:DiVA.org:uu-395545DiVA, id: diva2:1362592
Conference
AIMCAL(The Association of International Metallizers, Coaters and Laminators) R2R Conference USA 2019
Available from: 2019-10-21 Created: 2019-10-21 Last updated: 2019-10-21

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