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Magazine articles
Open Access
The effect of h2o on acidic sulfate corrosion in kraft recovery boilers, TAPPI JOURNAL, November 1996, Vol. 79(11)

The effect of h2o on acidic sulfate corrosion in kraft recovery boilers, TAPPI JOURNAL, November 1996, Vol. 79(11)

Magazine articles
Open Access
Vision of the future, TAPPI JOURNAL, November 1996, Vol. 79(11)

Vision of the future, TAPPI JOURNAL, November 1996, Vol. 79(11)

Magazine articles
Open Access
Cedar river paper co. celebrates success of no. 2 linerboard machine, TAPPI JOURNAL, November 1996, Vol. 79(11)

Cedar river paper co. celebrates success of no. 2 linerboard machine, TAPPI JOURNAL, November 1996, Vol. 79(11)

Magazine articles
Open Access
Corrosion and protection of kraft digesters, TAPPI JOURNAL, October 1996, Vol. 79(10)

Corrosion and protection of kraft digesters, TAPPI JOURNAL, October 1996, Vol. 79(10)

Magazine articles
Open Access
1990 Papermakers conference draws 1040 registrants to hear presentations about all aspects of papermaking, TAPPI JOURNAL, July 1990, Vol. 73(7)

1990 Papermakers conference draws 1040 registrants to hear presentations about all aspects of papermaking, TAPPI JOURNAL, July 1990, Vol. 73(7)

Magazine articles
Open Access
ASAM alkaline sulfite pulping process shows potential for large-scale application, TAPPI JOURNAL, April 1991, Vol. 74(4)

ASAM alkaline sulfite pulping process shows potential for large-scale application, TAPPI JOURNAL, April 1991, Vol. 74(4)

Magazine articles
Open Access
Alkaline advance helps liquid packaging board meet rigorous specifications, TAPPI JOURNAL, April 1991, Vol. 74(4)

Alkaline advance helps liquid packaging board meet rigorous specifications, TAPPI JOURNAL, April 1991, Vol. 74(4)

Magazine articles
Open Access
Biomass gasification project gets funding to solve black liquor safety and landfill problems, TAPPI JOURNAL, February 1991, Vol. 74(2)

Biomass gasification project gets funding to solve black liquor safety and landfill problems, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Magazine articles
Open Access
Improving paper wet strength via increased lignin content and hot-pressing temperature, TAPPI JOURNAL October 2020

ABSTRACT: It is known that the strength properties of wood-based paper materials can be enhanced via hot-pressing techniques. Today, there is a desire not only for a change from fossil-based packaging materials to new sustainable bio-based materials, but also for more effective and eco-friendly solutions for improving the dry and wet strength of paper and board. Against this background, hot pressing of paper made from high yield pulp (HYP), rich in lignin, becomes highly interesting. This study investigated the influence of pressing temperature and native lignin content on the properties of paper produced by means of hot pressing. Kraft pulps of varied lignin content (kappa numbers: 25, 50, 80) were produced at pilot scale from the same batch by varying the cooking time. We then studied the effect of lignin content by evaluating the physical properties of Rapid Köthen sheets after hot pressing in the temperature range of 20°C•200°C with a constant nip pressure of 7 MPa. The pilot-scale cooked pulps were compared with reference samples of mill-produced northern bleached soft-wood kraft (NBSK) pulp and mill-produced chemithermomechanical pulp (CTMP).Generally, the results demonstrated that lignin content had a significant effect on both dry and wet tensile index. All of the pilot cooked pulps with increased lignin content had a higher tensile index than the reference NBSK pulp. To obtain high tensile index, both dry and wet, the pressing temperature should be set high, preferably at least 200°C; that is, well above the glass transition temperature (Tg) for lignin. Moreover, the lignin content should prefera-bly also be high. All kraft pulps investigated in this study showed a linear relationship between wet strength and lignin content.

Magazine articles
Open Access
Corrosion in lower furnace of kraft recovery boilersâ??in-situ characterization of corrosive environments, Solutions! & TAPPI JOURNAL, February 2004, Vol. 3(2) (179KB)

Corrosion in lower furnace of kraft recovery boilers–in-situ characterization of corrosive environments, Solutions! & TAPPI JOURNAL, February 2004, Vol. 3(2) (179KB)

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