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Barrier Properties of greaseproof paper
2005 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

The barrier properties of greaseproof paper are achieved by extensive beating of the fibres. This treatment results in high costs for energy, both as beating energy and drying energy. A full-scale trial has been performed to investigate the role of the pulp with respect to energy demand and the barrier properties of the final papers. The paper made of 100% sulphite pulp with a low degree of beating showed the lowest energy consumption at a given level of barrier properties such as air permeance, grease resistance and water vapour transmission rate.



The papers produced in the full-scale trial have been used as substrates for coating. Greaseproof paper has a closed surface and should therefore be a good base paper for barrier coatings.



Chitosan has been used as a barrier coating because of its good oxygen barrier properties. Moreover, chitosan is a renewable material. Coating trials on a bench-scale showed that greaseproof paper can be upgraded to provide a good oxygen barrier. The oxygen barrier could not be achieved on a pilot-scale using the metered size press technique, because of the low coat weight applied.



The influence of the base paper on the barrier properties of chitosan-coated paper has been investigated. It was found that greaseproof paper is better than a paper with a higher porosity. The coating seemed to stay more on the surface of the greaseproof papers and to form a continuous coating layer with better barrier properties.

Place, publisher, year, edition, pages
Karlstad: Karlstad University Studies , 2005.
Keyword [en]
Greaseproof papers, Air permeance, Coatings, Chitosan, Oxygen Barrier properties
National Category
Chemical Engineering
Research subject
Chemical Engineering
Identifiers
URN: urn:nbn:se:kau:diva-17299ISBN: 9185335576 (print)OAI: oai:DiVA.org:kau-17299DiVA, id: diva2:590905
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-01-21

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Total: 23 hits
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