Inventory audit notice: TAPPI Press orders will not be processed from August 21–28 during our fiscal year-end inventory audit. Orders placed during this time will ship starting August 31, in the order received. Normal payment processing also resumes August 31.

Thanks for your patience — this helps us serve our members better.

Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 3,131–3,140 of 3,183 results (Duration : 0.012 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

Journal articles
Open Access
Formation of polychlorinated phenolic compounds during high chlorine dioxide substitution bleaching: part 1: laboratory investigation, TAPPI JOURNAL, August 1994, Vol. 77(8)

Formation of polychlorinated phenolic compounds during high chlorine dioxide substitution bleaching: part 1: laboratory investigation, TAPPI JOURNAL, August 1994, Vol. 77(8)

Journal articles
Open Access
Formation of polychlorinated phenolic compounds during high chlorine dioxide substitution bleaching part 3: mill trial results, TAPPI JOURNAL, August 1994, Vol. 77(8)

Formation of polychlorinated phenolic compounds during high chlorine dioxide substitution bleaching part 3: mill trial results, TAPPI JOURNAL, August 1994, Vol. 77(8)

Journal articles
Open Access
Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)

Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)

Journal articles
Open Access
Predicting print mottle: a method of differentiating between three types of mottle, TAPPI JOURNAL, July 1994, Vol. 77(7)

Predicting print mottle: a method of differentiating between three types of mottle, TAPPI JOURNAL, July 1994, Vol. 77(7)

Journal articles
Open Access
The dagbladet full-scale printing trials: part 3: linting in four-color offset printing, TAPPI JOURNAL, July 1994, Vol. 77(7)

The dagbladet full-scale printing trials: part 3: linting in four-color offset printing, TAPPI JOURNAL, July 1994, Vol. 77(7)

Journal articles
Open Access
Hydrodynamic Pressure Generated by Doctoring in Blade Gap Fo

Hydrodynamic Pressure Generated by Doctoring in Blade Gap Formers, 1999 Engineering Conference Proceedings

Journal articles
Magazine articles
RMM Beliefs: Part I, Paper360º November/December 2020

RMM Beliefs: Part I, Paper360º November/December 2020

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
Magazine articles
Open Access
Multilayering of conventional latex-based dispersion coatings containing small amounts of silica nanospheres: Runnability on a pilot scale flexographic coater and barrier performance, TAPPI Journal November 2023

ABSTRACT: The addition of functional coatings to packaging materials is a key requirement for increasing their performance and creating innovative packaging solutions. Flexography, a cost-effective printing method commonly used to print information and graphics directly onto a wide variety of packaging substrates, shows good potential for applying functional coatings. In this study, conventional clay-latex coating formulations containing approximately 1.3 wt% silica nanospheres were applied to a linerboard using a pilot scale flexographic printing web press. The performance of multilayered silica nanosphere-based coatings was compared with conventional coatings containing talc and/or wax dispersion in terms of coating grammage, runnability, and barrier performance. Coating grammage increased with an increased number of coating layers and a significant decrease in both the water vapor transmission rate (WVTR) and the direct water uptake of water (Cobb 120 wettability test) was observed for coatings containing silica nanoparticles. In general, the silica nanosphere-based coatings performed better than talc-based coatings. Talc/wax-based coatings had the highest variation in surface roughness due to an uneven distribution and variations of coating layers.

Journal articles
Magazine articles
Open Access
Measurement and control of extensional viscosity in barrier coating dispersions, TAPPI Journal November 2023

ABSTRACT: This study aimed to understand the effect of various rheological additives on the extensional viscosity of barrier coating dispersions, as well as to understand the role extensional viscosity plays in stabilizing a liquid curtain. The apparent extensional viscosity was measured using two devices that create accelerating flows: a capillary viscometer and an orifice rheometer. Additives tested include several polyvinyl alcohols, a high molecular weight polyethylene oxide, and carboxymethylcellulose. Extensional viscosity plays a significant role in stabilizing a liquid curtain, as it slows down hole expansion and prevents impurities and disturbances from causing holes in the first place. Some of the additives could substantially increase the extensional viscosity of the dispersions without increasing the shear viscosity outside the typical range of processability for a curtain coater. Some of the additives exhibited coil-stretch transition, meaning they start increasing extensional viscosity above a certain extension rate. Polymers with low chain lengths exhibited finite extensibility, which indicates the polymer chain has fully extended and cannot provide further extensional viscosity, even though the extending force is increased. Polymeric additives with stiff or branched chains significantly raised shear viscosity without increasing extensional viscosity. Both methods could reliably measure extensional viscosity in curtain coating barrier dispersions.

Inside this Section