Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Journal articles
Drying and recycling of primary sludge at champion international, TAPPI JOURNAL, August 1993, Vol. 76(8)
Drying and recycling of primary sludge at champion international, TAPPI JOURNAL, August 1993, Vol. 76(8)
Magazine articles
Career management: choosing the game, TAPPI JOURNAL, August 1993, Vol. 76(8)
Career management: choosing the game, TAPPI JOURNAL, August 1993, Vol. 76(8)
Journal articles
Pigmenting and soft calendering of printing papers, TAPPI JOURNAL, December 1993, Vol. 76(12)
Pigmenting and soft calendering of printing papers, TAPPI JOURNAL, December 1993, Vol. 76(12)
Journal articles
Automated control of washer shower water at ITT Rayonier, TAPPI JOURNAL March 1988
Automated control of washer shower water at ITT Rayonier, TAPPI JOURNAL March 1988
Journal articles
Magazine articles
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
Machine Vision Applications Using Binary and Grayscale Morph
Machine Vision Applications Using Binary and Grayscale Morphology, 1994 Engineering Conference Proceedings
Journal articles
Modeling multicylinder paper drying-validation of a new simulation program, TAPPI JOURNAL, April 1996, Vol. 79(4)
Modeling multicylinder paper drying-validation of a new simulation program, TAPPI JOURNAL, April 1996, Vol. 79(4)
Journal articles
Application of xylanases in prebleaching of bamboo kraft pulp, TAPPI JOURNAL, April 1996, Vol. 79(4)
Application of xylanases in prebleaching of bamboo kraft pulp, TAPPI JOURNAL, April 1996, Vol. 79(4)
Journal articles
Thickness variation in coextruded layers - effect of polymer viscoelasticity on layer uniformity, TAPPI JOURNAL, April 1996, Vol. 79(4)
Thickness variation in coextruded layers - effect of polymer viscoelasticity on layer uniformity, TAPPI JOURNAL, April 1996, Vol. 79(4)
Journal articles
TAPPI 96 and New Orleans a great combination for a great impression, TAPPI JOURNAL, April 1996, Vol. 79(4)
TAPPI 96 and new orleans a great combination for a great impression, TAPPI JOURNAL, April 1996, Vol. 79(4)