, 16:75 | Cite as

Strength and barrier properties of MFC films

  • Kristin SyverudEmail author
  • Per Stenius


The preparation of microfibrillar cellulose (MFC) films by filtration on a polyamide filter cloth, in a dynamic sheet former and as a surface layer on base paper is described. Experimental evidence of the high tensile strength, density and elongation of films formed by MFC is given. Typically, a MFC film with basis weight 35 g/m2 had tensile index 146 ± 18 Nm/g and elongation 8.6 ± 1.6%. The E modulus (17.5 ± 1.0 GPa) of a film composed of randomly oriented fibrils was comparable to values for cellulose fibres with a fibril angle of 50°. The strength of the films formed in the dynamic sheet former was comparable to the strength of the MFC films prepared by filtration. The use of MFC as surface layer (0–8% of total basis weight) on base paper increased the strength of the paper sheets significantly and reduced their air permeability dramatically. FEG-SEM images indicated that the MFC layer reduced sheet porosity, i.e. the dense structure formed by the fibrils resulted in superior barrier properties. Oxygen transmission rates (OTR) as low as 17 ml m−2 day−1 were obtained for films prepared from pure MFC. This result fulfils the requirements for oxygen transmission rate in modified atmosphere packaging.


MFC Strength Barrier MFC films Microfibrillar cellulose Nano cellulose Paper 



The authors gratefully acknowledge Södra Cell, Borregaard Industries, Akzo Nobel and the NANOMAT programme of the Research Council of Norway for funding. Olav Solheim (PFI) is thanked for data processing and Øyvind Gregersen (NTNU) and Øyvind Eriksen for valuable discussions. Per Olav Johnsen is acknowledged for acquiring the images.


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Paper and Fibre Research Institute (PFI)TrondheimNorway
  2. 2.Ugelstad Laboratory, Department of Chemical EngineeringNTNUTrondheimNorway

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