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Magazine articles
Chromizing for near-drum corrosion protection, TAPPI JOURNAL, September 1999, Vol. 82(9)
Chromizing for near-drum corrosion protection, TAPPI JOURNAL, September 1999, Vol. 82(9)
Magazine articles
Papermakers conference stresses personal interaction, TAPPI JOURNAL, August 1994, Vol. 77(8)
Papermakers conference stresses personal interaction, TAPPI JOURNAL, August 1994, Vol. 77(8)
Journal articles
Magazine articles
Characterization of chia plant (Salvia hispanica) for pulping, TAPPI Journal October 2020
ABSTRACT: In this paper, chia plant was characterized in terms of chemical, morphological, and anatomical properties. Chia plant was characterized with low a-cellulose (30.5%); moderate lignin (23.2%) with syringyl to guaiacyl ratio of 1.41; and shorter fiber length (0.67 mm) with thinner cell wall (1.91 µm) and good flexibility coefficient (71.44). Anatomical features showed that chia plant consists of vessels, fibers, parenchyma cells, and collenchyma cells. Chia plant pulping was evaluated in soda-anthraquinone (soda-AQ) and formic acid/peroxyformic acid (FA/PFA) processes. Chia plant was difficult to delignify in the alkaline process. The FA/PFA process produced higher pulp yield at the same kappa number than the soda-AQ process. Unbleached soda-AQ chia pulp exhibited good properties in terms of tensile, bursting, and tearing strengths, even at the unrefined stage, due to high drainability of the pulps. Alkaline peroxide bleached FA/PFA pulp exhibited better papermaking properties and 2% higher brightness than the D0(EP)D1 bleached soda-AQ pulp.
Journal articles
Magazine articles
Kraft pulp bleaching with a P-stage catalyzed by both bicarbonate and TAED, TAPPI Journal July 2019
ABSTRACT: Peroxide bleaching of softwood and hardwood (eucalypt) kraft pulps was performed in solutions of sodium bicarbonate (NaHCO3), sodium carbonate (Na2CO3), and sodium hydroxide (NaOH). The conventional P stage (hydrogen peroxide + sodium hydroxide; H2O2 + NaOH) was the most effective brightening system without an additional activator. However, peroxide activation by bicarbonate anion (HCO3•) was obvious in all cases where NaHCO3 or Na2CO3 was used. When N,N,N’,N’-tetraacetylethylenediamine (TAED) was added to the bleaching sys-tem, Na2CO3 as the alkali source afforded equal or slightly higher bleached brightness compared to NaOH usage for both the softwood and hardwood pulps. This outcome is attributed to simultaneous peroxide activation by HCO3• and TAED. When applied to the eucalypt pulp, the H2O2/Na2CO3/TAED bleaching system also decreased the bright-ness loss due to thermal reversion.
Magazine articles
Guest Commentary: Forests and biofuels: An opportunity for p
Guest Commentary: Forests and biofuels: An opportunity for public-private partnering, TAPPI JOURNAL May 2011
Magazine articles
A volunteer honored: David J. Bentley Jr., TAPPI JOURNAL, March 2000, Vol. 83(3)
A volunteer honored: David J. Bentley Jr., TAPPI JOURNAL, March 2000, Vol. 83(3)
Magazine articles
Solvay paperboard repeats success with pm 2, TAPPI JOURNAL, March 2000, Vol. 83(3)
Solvay paperboard repeats success with pm 2, TAPPI JOURNAL, March 2000, Vol. 83(3)
Magazine articles
Survival techniques: extending the life of press fabrics, TAPPI JOURNAL, July 1997, Vol. 80(7)
Survival techniques: extending the life of press fabrics, TAPPI JOURNAL, July 1997, Vol. 80(7)
Journal articles
Magazine articles
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.
Magazine articles
The practical influence of heterogeneity on tensile accelerated creep in paper, TAPPI JOURNAL, March 2001, Vol. 84(3)
The practical influence of heterogeneity on tensile accelerated creep in paper, TAPPI JOURNAL, March 2001, Vol. 84(3)
