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Deinking process water flotation

Deinking process water flotation: An innovative solution to improve deinking and papermaking processes efficiency, TAPPI JOURNAL November 2017

Journal articles
Magazine articles
Open Access
Kinetics of sulfur dioxide-alcohol-water (SAW) pulping of su

Kinetics of sulfur dioxide-alcohol-water (SAW) pulping of sugarcane straw (SCS), TAPPI JOURNAL June 2017

Journal articles
Magazine articles
Open Access
Use of vent stack temperature as a feedforward variable for dissolver total titratable alkali (TTA) control, TAPPI JOURNAL May 2018

Use of vent stack temperature as a feedforward variable for dissolver total titratable alkali (TTA) control, TAPPI JOURNAL May 2018

Journal articles
Magazine articles
Open Access
Low consistency refining of mechanical pulp — system design

Low consistency refining of mechanical pulp — system design, TAPPI JOURNAL July 2017

Journal articles
Magazine articles
Open Access
Operational limits of blade coating associated with high aspect ratio pigments: Part I—bench top blade coater, TAPPI Journal February 2019

Operational limits of blade coating associated with high aspect ratio pigments: Part I—bench top blade coater, TAPPI Journal February 2019

Journal articles
Magazine articles
Open Access
Operational limits of blade coating assocciated with high aspect ratio pigments: PartII—cylindrical laboratory coater, TAPPI Journal February 2019

Operational limits of blade coating assocciated with high aspect ratio pigments: PartII—cylindrical laboratory coater, TAPPI Journal February 2019

Journal articles
Magazine articles
Open Access
Cracking at the fold in double layer coated paper: the influence of latex and starch composition, TAPPI Journal February 2019

Cracking at the fold in double layer coated paper: the influence of latex and starch composition, TAPPI Journal February 2019

Journal articles
Magazine articles
Open Access
Synthesis and characterization of novel foams by pyrolysis of lignin, TAPPI Journal January 2019

Synthesis and characterization of novel foams by pyrolysis of lignin, TAPPI Journal January 2019

Journal articles
Magazine articles
Open Access
Rheological characterization of tack and viscoelasticity of compositions of crepe coating used in the Yankee dryer, TAPPI Journal November 2019

ABSTRACT: The vast majority of tissue production uses creping to achieve the required set of properties on the base sheet. The Yankee coating helps to develop the desired crepe that in turn determines properties such as bulk and softness. The adhesion of the sheet to the Yankee surface is a very important characteristic to consider in achieving the desired crepe. The coating mix usually consists of the adhesive, modifier, and release. A good combination of these components is essential to achieving the desired properties of the tissue or towel, which often are determined by trials on the machine that can be time consuming and lead to costly rejects. In this paper, five compo-sitions of an industrial Yankee coating adhesive, modifier, and release were examined rheologically. The weight ratio of the adhesive was kept constant at 30% in all five compositions and the modifier and release ratios were varied. The normal force and work done by the different compositions have been shown at various temperatures simulating that of the Yankee surface, and the oscillatory test was carried out to explain the linear and nonlinear viscoelastic characteristic of the optimal coating composition.

Journal articles
Magazine articles
Open Access
A novel predictive method for filler coflocculation with cellulose microfibrils, TAPPI Journal November 2019

ABSTRACT: Different strategies aimed at reducing the negative impact of fillers on paper strength have been the objective of many studies during the past few decades. Some new strategies have even been patented or commercialized, yet a complete study on the behavior of the filler flocs and their effect on retention, drainage, and formation has not been found in literature. This type of research on fillers is often limited by difficulties in simulating high levels of shear at laboratory scale similar to those at mill scale. To address this challenge, a combination of techniques was used to compare preflocculation (i.e., filler is flocculated before addition to the pulp) with coflocculation strategies (i.e., filler is mixed with a binder and flocculated before addition to the pulp). The effect on filler and fiber flocs size was studied in a pilot flow loop using focal beam reflectance measurement (FBRM) and image analysis. Flocs obtained with cationic polyacrylamide (CPAM) and benonite were shown to have similar shear resistance with both strategies, whereas cationic starch (CS) was clearly more advantageous when coflocculation strategy was used. The effect of flocculation strategy on drainage rate, STFI formation, ash retention, and standard strength properties was measured. Coflocculation of filler with CPAM plus bentonite or CS showed promising results and produced sheets with high strength but had a negative impact on wire dewatering, opening a door for further optimization.

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