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The relationship between energy requirements and barrier properties in the production of greaseproof paper
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Paper Surface Centre.
2005 (English)In: Tappi Journal (2005), vol. 4, no 8, pp7-11Article in journal (Refereed)
Abstract [en]

A full-scale mill trial surveyed the energy required to produce greaseproof paper. The furnishes studied were a 100% sulfite pulp and a 50/50 sulfite/sulfate pulp, refined to two freeness levels. The papers produced were then calendered at two line-loads using a soft-nip laboratory calender and tested with respect to air permeability, water vapor transmission rate, grease resistance, tear strength, and tensile strength. The least energy-demanding (beating + drying) process was that used to produce the paper from 100% sulfite pulp of low freeness. This paper exhibited approximately the same water vapor transmission rate and grease resistance as the paper made from high freeness 100% sulfite pulp. The papers produced from 50/50 sulfite/sulfate furnish exhibited poorer barrier properties. The mechanical properties of all the papers produced satisfied the specifications for standard greaseproof paper. Beating improved the barrier properties, but required additional energy. Results showed that the same or better barrier properties can be achieved with calendering or surface coating, with lower energy input. We also found that the furnish composition and beating and the calendering affected air permeability in different ways. The former affected both the pore volume fraction and the pore dimensions, while the latter mainly affected the pore volume fraction

Place, publisher, year, edition, pages
Keyword [en]
air permeability, barrier properties, beating, calendering, coating, energy consumption, freeness, grease resistance, greaseproof paper, kraft pulp, mill trial, pore size, pore volume, sulfite pulp, tear strength, tensile strength
National Category
Chemical Engineering
Research subject
Chemical Engineering
URN: urn:nbn:se:kau:diva-24716OAI: diva2:598487
Barrier coatings for greaseproof paper
Available from: 2013-01-22 Created: 2013-01-22 Last updated: 2013-01-22

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Engström, Gunnar
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