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Höglund, Hans
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Publications (10 of 71) Show all publications
Höglund, H., Pettersson, G., Norgren, S. & Engstrand, P. (2018). A paper or paperboard product comprising at least one ply containing high yield pulp and its production method. se 540115 C2.
Open this publication in new window or tab >>A paper or paperboard product comprising at least one ply containing high yield pulp and its production method
2018 (English)Patent (Other (popular science, discussion, etc.))
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:miun:diva-33506 (URN)
Patent
SE 540115 C2
Note

International application WO 2018054957 A1.

Available from: 2018-04-17 Created: 2018-04-17 Last updated: 2018-04-17Bibliographically approved
Samuelsson, T., Pettersson, G., Norgren, S., Svedberg, A., Höglund, H. & Engstrand, P. (2018). Development of strong and water resistant packaging materials from high yield pulps – fundamental aspects. In: IMPC 2018: . Paper presented at International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway. Trondheim, Norway
Open this publication in new window or tab >>Development of strong and water resistant packaging materials from high yield pulps – fundamental aspects
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2018 (English)In: IMPC 2018, Trondheim, Norway, 2018Conference paper, Published paper (Refereed)
Abstract [en]

This work is focused on fundamental aspects of the densification of paper sheets during hot-pressing under conditions where the lignin in the fibre walls is softened. In this study light microscope and scanning electron microscope (SEM) techniques were used to reveal the mechanisms in the fibre network structure within the paper sheets that arises due to densification and the impact of lignin. UV and staining methods and spectrometric observations of the ultrastructure of cross section of paper sheets and fibre surfaces will highlight the changes that occur in the fibre structures. This study improves the understanding of how fibres collapse and how internal fibre-fibre bonds in lignin-rich mechanical pulp affect the physical properties of the final paper sheet. To demonstrate this, paper sheets from five different pulps containing different concentration of natural lignin were produced. Handsheets of 150 g/m2 were prepared in a Rapid Köthen (RK) laboratory sheet former, where the sheets were press-dried at 100 kPa and ca 90oC to a dry content of 45-50% d.c. After 24 hours in room temperature the hand sheets were hot-pressed in a temperature interval from 20 – 200oC at a constant pressure in a cylinder-press at a speed of 1 m/min. The results show that remarkable improvements on paper sheets, based lignin-rich pulps, can be achieved in terms of increased tensile index (up to 85 kNm/kg), compression strength, SCT, (up to 38 kNm/kg) and wet strength (up to 10 kNm/kg), which depends on the densification of the fibre structure at high temperature and pressure in the load nip. It is concluded that this to a major extent is related to that the lignin rich fibres are compressed at high enough temperature to both softened and develop tacky surfaces so that the fibres are locked into their positions within the highly densified sheets. The SEM evaluation shows how the surface structure get dense at pressing at 200oC for the CTMP based paper sheets. The light microscopy studies of the sheet cross sections reveal how the fibres collapse in the case of CTMP based sheets while fibres from bleached kraft pulp based sheets are quite well collapsed already at room temperature.

Place, publisher, year, edition, pages
Trondheim, Norway: , 2018
Keywords
ctmp, densification, hand sheets, hyp, lignin, mechanical pulp, nssc, strength properties, tmp, wet strength
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:miun:diva-34675 (URN)
Conference
International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway
Available from: 2018-10-09 Created: 2018-10-09 Last updated: 2018-10-09Bibliographically approved
Norgren, S., Pettersson, G. & Höglund, H. (2018). Strong paper from spruce CTMP - Part II: Effect of pressing at nip press temperatures above the lignin softening temperature. Nordic Pulp & Paper Research Journal, 33(1), 142-149
Open this publication in new window or tab >>Strong paper from spruce CTMP - Part II: Effect of pressing at nip press temperatures above the lignin softening temperature
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 33, no 1, p. 142-149Article in journal (Refereed) Published
Abstract [en]

The main objective of the current study was to demonstrate that it is possible to enhance strength properties of sheets from spruce HT-CTMP and CTMP furnishes up to the same level as is common on sheets from softwood kraft pulps by changing conditions in papermaking. To achieve that, sheets of spruce HT-CTMP and CTMP were consolidated at densities close to that of the reference bleach kraft pulp by pressing at press nip temperatures well above the tack and softening temperatures of lignin. On sheets from spruce CTMP (CSF 420 ml), where the fibers were surface treated with cationic starch, it was possible to reach tensile index at the same level as on sheets from the untreated reference kraft pulp. The compression strength (SCT) of CTMP and HT-CTMP sheets, which were achieved at the highest press nip temperature (200 °C) in the study, was equal to or higher than that of the reference kraft pulp sheets. The results show that there is a great yet unexploited potential in papermaking from spruce HT-CTMP and CTMP furnishes, which could be utilized in manufacturing of products where very high requirements upon strength is demanded. 

Keywords
adsorption, CMC, CTMP, heat, polyelectrolytes, pressure, starch, tensile index
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-34544 (URN)10.1515/npprj-2018-3009 (DOI)2-s2.0-85048028992 (Scopus ID)
Available from: 2018-09-27 Created: 2018-09-27 Last updated: 2018-09-27Bibliographically approved
Pettersson, G., Norgren, S. & Höglund, H. (2017). Strong paper from spruce CTMP - Part I. Nordic Pulp & Paper Research Journal, 32(1), 54-58
Open this publication in new window or tab >>Strong paper from spruce CTMP - Part I
2017 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 1, p. 54-58Article in journal (Refereed) Published
Abstract [en]

This study was carried out on sheets from spruce CTMP fibers, which are surface treated with a mix of cationic starch and CMC and blended with 20% bleach softwood chemical pulp fibers before handsheets were prepared in a Rapid Köthen sheet former, where the sheets were dried to 40-55% d.c. The sheets were pressed in a hot press nip in a pilot machine with adjustable pressure and heat. Both low and high nip pressure were used in combination with two different nip temperatures, 80°C and 100°C, to achieve sheets in a broad range of densities. The results show that remarkable improvements are possible, both in terms of tensile index (up to 85 kNm/kg) and compression strength, SCT, (up to 38 kNm/kg) on the CTMP-based sheets under optimal conditions at papermaking, i.e. consolidate the sheet structure in a press nip at evaluated temperatures. It is evident from the current study that there is an as of yet unexploited potential in modifying the conditions of papermaking from spruce CTMP furnishes, which can be utilized for the manufacturing of papers with high requirements on strength and stiffness, e.g. packaging papers.

Keywords
Adsorption, CMC, CTMP, Heat, Polyelectrolytes, Pressure, Starch, Tensile index
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-30664 (URN)10.3183/NPPRJ-2017-32-01-p054-058 (DOI)000398384400007 ()2-s2.0-85016441688 (Scopus ID)
Available from: 2017-04-26 Created: 2017-04-26 Last updated: 2017-06-09Bibliographically approved
Pettersson, G., Norgren, S., Höglund, H. & Engstrand, P. (2016). Low energy CTMP in strong and bulky paperboard plies. In: Paper Conference and Trade Show, PaperCon 2016: . Paper presented at Paper Conference and Trade Show, PaperCon 2016, 15 May 2016 through 18 May 2016, Cincinnati; United States (pp. 556-564). TAPPI Press, 1
Open this publication in new window or tab >>Low energy CTMP in strong and bulky paperboard plies
2016 (English)In: Paper Conference and Trade Show, PaperCon 2016, TAPPI Press, 2016, Vol. 1, p. 556-564Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
TAPPI Press, 2016
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-30112 (URN)2-s2.0-85010465464 (Scopus ID)9781510831193 (ISBN)
Conference
Paper Conference and Trade Show, PaperCon 2016, 15 May 2016 through 18 May 2016, Cincinnati; United States
Available from: 2017-02-14 Created: 2017-02-14 Last updated: 2017-02-14Bibliographically approved
Pettersson, G., Norgren, S. & Höglund, H. (2016). Strong paper from spruce CTMP. In: International Mechanical Pulping Conference 2016, IMPC 2016: . Paper presented at International Mechanical Pulping Conference 2016, IMPC 2016; Jacksonville; United States; 26 September 2016 through 28 September 2016 (pp. 229-233). TAPPI Press
Open this publication in new window or tab >>Strong paper from spruce CTMP
2016 (English)In: International Mechanical Pulping Conference 2016, IMPC 2016, TAPPI Press, 2016, p. 229-233Conference paper, Published paper (Refereed)
Abstract [en]

This study was carried out on sheets from spruce CTMP fibers, which are surface treated with a mix of cationic starch and CMC and blended with 20% bleach softwood chemical pulp fibers before handsheets were prepared in a Rapid Kothen sheet former, where the sheets were dried to 40-55% d.c. The sheets were pressed in a hot press nip in a pilot machine with adjustable pressure and heat. Both low and high nip pressure were used in combination with two different nip temperatures, 80 °C and 100 °C, to achieve sheets in a broad range of densities. The results show that remarkable improvements are possible, both in terms of tensile index (up to 85 kNm/kg) and compression strength, SCT, (up to 38kNm/kg) on the CTMP-based sheets under optimal conditions at papermaking, i.e. consolidate the sheet structure in a press nip at evaluated temperatures. It is evident from the current study that there is an as of yet unexploited potential in modifying the conditions of papermaking from spruce CTMP furnishes, which can be utilized for the manufacturing of papers with high requirements on strength and stiffness, e.g. packaging papers.

Place, publisher, year, edition, pages
TAPPI Press, 2016
Keywords
CMC, CTMP, Heat, Polyelectrolytes, Pressure, Starch, Tensile index Adsorption
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-29836 (URN)2-s2.0-85006415447 (Scopus ID)9781510830738 (ISBN)
Conference
International Mechanical Pulping Conference 2016, IMPC 2016; Jacksonville; United States; 26 September 2016 through 28 September 2016
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-04-26Bibliographically approved
Pettersson, G., Höglund, H., Norgren, S., Sjöberg, J., Peng, F., Hallgren, H., . . . Solberg, D. (2015). Strong and bulky paperboard sheets from surface modified CTMP, manufactured at low energy. Nordic Pulp & Paper Research Journal, 30(2), 318-324
Open this publication in new window or tab >>Strong and bulky paperboard sheets from surface modified CTMP, manufactured at low energy
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2015 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 30, no 2, p. 318-324Article in journal (Refereed) Published
Abstract [en]

A description is given regarding methods used to manufacture strong and bulky sheets from furnishes based on a broad range of surface modified CTMP qualities. Starch and CMC are adsorbed on the fibre surfaces using a multilayer or a MIX concept. It is shown that both the in-plane and out-of-plane strength for the CTMP based sheets after such surface treatment can be more than doubled at a maintained density. This can be utilized to improve bending stiffness or to reduce the basis weight in multi-ply paperboards.

Keywords
CTMP, Starch, CMC, Multilayer, Paperboard, Strength properties
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-25692 (URN)000354806700018 ()2-s2.0-84945899503 (Scopus ID)
Available from: 2015-08-21 Created: 2015-08-18 Last updated: 2017-08-10Bibliographically approved
Norgren, S. & Hoglund, H. (2014). Consolidation of fibre-fibre bonds in TMP and CTMP based papers. Paper Technology, 55(3), 6-10
Open this publication in new window or tab >>Consolidation of fibre-fibre bonds in TMP and CTMP based papers
2014 (English)In: Paper Technology, ISSN 0958-6024, Vol. 55, no 3, p. 6-10Article in journal (Other academic) Published
Abstract [en]

TMP and CTMP fibres are viscoelastic materials, which behave very differently at different temperatures and loading rates, should also be considered in papermaking. The positive effects of increased web temperature on dewatering and web consolidation (sheet strength) in pressing and drying of TMP/CTMP based papers have been known for some time. However, the effects of dry content during such conditions are less closely investigated. In this paper the effect of dry content on fibre-fibre bonds in consolidation of paper webs during press drying at high temperature is discussed. It is shown that the final paper strength is especially positively affected when a Z-directionalpressure is applied in the dryness range 50-75%.

National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:miun:diva-22632 (URN)2-s2.0-84904868180 (Scopus ID)
Note

CODEN: PATEE

Available from: 2014-09-22 Created: 2014-08-20 Last updated: 2014-09-22Bibliographically approved
Norgren, S., Pettersson, G. & Höglund, H. (2014). High strength papers from high yield pulps. In: International Mechanical Pulping Conference, IMPC 2014: . Paper presented at International Mechanical Pulping Conference, IMPC 2014; Helsinki; Finland; 2 June 2014 through 5 June 2014; Code 109275.
Open this publication in new window or tab >>High strength papers from high yield pulps
2014 (English)In: International Mechanical Pulping Conference, IMPC 2014, 2014Conference paper, Published paper (Refereed)
Abstract [en]

The positive effects changing the present standard conditions regarding temperature and moisture content during pressing and drying in papermaking of high yield pulp furnishes, such as those from TMP and CTMP, has previously been reported in a series of studies at Mid Sweden University. In the current study, the effects of fibre surface modification by starch/CMC at press-drying conditions have been investigated. It is shown how the strength properties of sheets from HTCTMP, manufactured at very low electric energy consumption (approximately 600 kWh/ton), can be radically improved by several hundred percent at optimum papermaking conditions.

Series
International Mechanical Pulping Conference, IMPC 2014
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-24067 (URN)2-s2.0-84923974435 (Scopus ID)9780000000002 (ISBN)
Conference
International Mechanical Pulping Conference, IMPC 2014; Helsinki; Finland; 2 June 2014 through 5 June 2014; Code 109275
Note

Export Date: 7 January 2015

Available from: 2015-01-08 Created: 2015-01-07 Last updated: 2015-08-12Bibliographically approved
Pettersson, G., Höglund, H., Sjöberg, J. C., Peng, F., Bergström, J., Solberg, D., . . . Ljungqvist, C.-H. -. (2014). Strong and bulky paperboard plies from low energy CTMP. In: International Mechanical Pulping Conference, IMPC 2014: . Paper presented at International Mechanical Pulping Conference, IMPC 2014; Helsinki; Finland; 2 June 2014 through 5 June 2014; Code 109275.
Open this publication in new window or tab >>Strong and bulky paperboard plies from low energy CTMP
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2014 (English)In: International Mechanical Pulping Conference, IMPC 2014, 2014Conference paper, Published paper (Refereed)
Abstract [en]

A description is given regarding methods used to manufacture strong and bulky sheets from furnishes based on a broad range of surface modified CTMP qualities. Starch and CMC are adsorbed on the fibre surfaces using a multilayer or a MIX concept. It is shown that both the in-plane and out-of-plane strength for the CTMP based sheets after such surface treatment can be more than doubled at a maintained density. This can be utilized to improve bending stiffness or to reduce the basis weight in multi-ply paperboards.

National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-24070 (URN)2-s2.0-84924007797 (Scopus ID)9780000000002 (ISBN)
Conference
International Mechanical Pulping Conference, IMPC 2014; Helsinki; Finland; 2 June 2014 through 5 June 2014; Code 109275
Note

Export Date: 7 January 2015

Available from: 2015-01-08 Created: 2015-01-07 Last updated: 2015-08-12Bibliographically approved
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