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Journal articles
Open Access
Optimizing the performance of coextrudable adhesive resins,

Optimizing the performance of coextrudable adhesive resins, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Open Access
Effect of entrained black liquor carry-over on medium-consis

Effect of entrained black liquor carry-over on medium-consistency oxygen delignification, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Open Access
Organochlorite in bleached kraft pulp, TAPPI JOURNAL, February 1991, Vol. 74(2)

Organochlorite in bleached kraft pulp, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Open Access
New trends in deinking technology removing difficult inks from wastepaper, TAPPI JOURNAL, February 1991, Vol. 74(2)

New trends in deinking technology removing difficult inks from wastepaper, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Open Access
Quality of chips produced with chain flails and woodland chi

Quality of chips produced with chain flails and woodland chippers, 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.

Journal articles
Open Access
Optimizing Alkaline Extraction for Eucalyptus Kraft Pulp Bleaching, TAPPI JOURNAL January 2009

Optimizing Alkaline Extraction for Eucalyptus Kraft Pulp Bleaching, TAPPI JOURNAL January 2009

Journal articles
Open Access
A Statistical Study of Process Variables to Optimize a High Speed Curtain Coater: Part I, TAPPI JOURNAL January 2009

A Statistical Study of Process Variables to Optimize a High Speed Curtain Coater: Part I, TAPPI JOURNAL January 2009

Journal articles
Open Access
An Assessment of Gasification-Based Biorefining at Kraft Pulp and Paper Mills in the United States, Part B: Results, TAPPI JOURNAL January 2009

An Assessment of Gasification-Based Biorefining at Kraft Pulp and Paper Mills in the United States, Part B: Results, TAPPI JOURNAL January 2009

Journal articles
Open Access
Reduction of Organic Pollutants with Recovery of Value-Added Products From Soda Black Liquor of Agricultural Residues by Electrolysis, TAPPI JOURNAL July 2009

Reduction of Organic Pollutants with Recovery of Value-Added Products From Soda Black Liquor of Agricultural Residues by Electrolysis, TAPPI JOURNAL July 2009

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