Improving multilayer packaging performance with nanocellulose barrier layer

Jari Vartiainen, Timo Kaljunen, Heli Nykänen, Tero Malm, Tekla Tammelin

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)

    Abstract

    Nanocellulose, also referred to as cellulose nanofibrils (CNF) is one of the most studied innovations for the modem forest sector. Until very recently, CNF films have been produced at small-scale using slow filtration methods. In this presentation, the first steps towards continuous CNF film production are presented. VTT's semi-industrial roll-to-roll pilot-line was successfully utilized in producing high quality CNF films with some promising technical properties (oxygen barrier, temperature resistance, tensile strength). However, as single layer CNF films have relatively weak moisture resistance, flexibility and zero sealability, the multilayer structures were also produced. Tempo-oxidized CNF was first dispersion coated onto PET film and further extrusion coated with LDPE resulting in a 3-layer structure: PET/CNF/LDPE. 3-layer structure had excellent technical properties which fulfilled the requirements of modified atmosphere food packaging. Demonstrator pouches filled with nitrogen were produced with the packaging machine and the oxygen concentration inside the packages was monitored as a function of time. As a result, CNF containing multilayer films performed better as compared to commercial 3-layer multilayer films containing EVOH barrier layer. The developed films could be used as a packaging material for dry or low moisture content food products such as dry snacks, dried fruits, nuts, spices etc.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publicationTAPPI PLACE Conference 2014
    PublisherTAPPI Press
    Pages763-790
    Volume2
    ISBN (Print)978-151080127-1
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventTappi Place Conference 2014 - Ponte Vedra, FL, United States
    Duration: 13 May 201415 May 2014

    Conference

    ConferenceTappi Place Conference 2014
    Country/TerritoryUnited States
    CityPonte Vedra, FL
    Period13/05/1415/05/14

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