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- De Magistris, Federica, et al.
(author)
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Effect of calendering on the compressibility of papers made with fibre of various properties
- 2010
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Conference paper (pop. science, debate, etc.)abstract
- The surface and bulk compressibility of a given paper influence its calendering, coating, surface sizing and printing properties. This study aims at a deeper knowledge of which variable affects the compressibility of paper sheets and how calendering effect different sheet properties. The pulps were characterized by their chemical compositions and physical properties. The bulk compressibility, the surface compressibility and the thickness were evaluated both before and after calendering
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| 2. |
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| 3. |
- De Magistris, F., et al.
(author)
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Influence of paper compressibility on flexographic printing quality
- 2008
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In: Progress in paper physics seminar 2008, proceedings, Espoo, Finland, 2-5 June 2008. - 9789512293919 ; , s. 243-245
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Conference paper (pop. science, debate, etc.)abstract
- The compression ability of fibres and fibre networks were investigated. The surface and bulk compressions of paper influence calendering, coating, surface sizing ability and the penetration of ink in printing. Two kraft pulps (spruce) were produced in the laboratory to obtain pulps with different levels of xylan. Using those kraft pulps alone or mixed with 50% of a commercial TMP pulp, single-layer sheets were formed in a Formette Dynamique sheet former. The pulps and mixture levels were chosen to obtain papers with systematically altered property variation but with constant grammage. The papers were characterized according to both bulk and surface compressibility. The papers were printed in a flexo IGTF1 laboratory printing press and the transferred amount of ink, dot gain, and mottling were analyzed.
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| 4. |
- Wilke, Caroline, 1982-, et al.
(author)
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Integrated Forest Biorefinery : A Proposed Pulp Mill of 2040
- 2021
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Reports (peer-reviewed)abstract
- Negative environmental impact from greenhouse gas emissions and a dwindling oil supply have resulted in an interest in biorefineries based on renewable resources. The objective of a biorefinery is to upgrade the biomass to more valuable products such as biofuels, electricity, materials, and chemicals. Wood biomass is a suitable raw material for a biorefinery since it is abundant, renewable and can be harvested all year round.In the kraft pulping process, only half of the wood biomass is converted into pulp while the remaining part is turned into energy. A conventional kraft pulp mill could be transformed into an integrated forest biorefinery, and thus produce for example biofuels and chemicals in addition to the traditional pulp and paper products, by implementing several new processes that could utilize the byproducts. Utilization of the byproducts for other purposes than energy would obviously affect the energy balance but also the important sodium/sulfur balance.The processes that are discussed in this report have the potential to be included in a BAT pulp mill built in 2040. The processes are black liquor gasification, on-site production of sulfuric acid, production of tall oil diesel, and lignin and hemicellulose extraction. The possibility to produce a cleaner green liquor through a new membrane filter is also discussed.
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