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Market reports
The Future of Specialty Papers in North and South America: market forecasts to 2017
The Future of Specialty Papers in North and South America: market forecasts to 2017
On-Line Monitoring for Performance and Quality, 1995 Process
On-Line Monitoring for Performance and Quality, 1995 Process & Product Quality Conference Proceedings
Polyelectrolyte Interactions with Papermaking Fibers: the Mechanism of surface Charge Decay, 1993 Papermakers Conference PM93569
Polyelectrolyte Interactions with Papermaking Fibers: The Mechanism of Surface Charge Decay, 1993 Papermakers Conference Proceedings
TAPPI News
An Accent on Innovation
An Accent on Innovation On May 13, 2014, Eric Fletty and I had the opportunity to visit with one of TAPPI’s Sustaining Member companies, Kadant Inc., at its Kadant Johnson facility in Three Rivers,
News
‘Make in India’ vs. Making Paper in India: A Balancing Act?
This is an excerpt from an article originally published in the Jun-Jul 2017 issue of Paper Mart India magazine (www.papermart.in). With the incessant and nagging challenges of raw material availability, adherence to environmental norms, and competing with swiftly increasing cheaper imports, India’s pulp and paper industry has the arduous target of creating 1,000,000 tonnes (metric tons) of integrated capacities in pulp, paper, and paperboard to meet consumption demands—a daunting task without conducive policy environment. Does the Indian government’s “Make in India” campaign take stock of challenging manufacturing conditions in this vital industry? The editors of Paper Mart India interviewed experts in India’s growing pulp and paper industry to learn more.
News
Mountains of waste could lead to new U.S. manufacturing, jobs
By Kathleen Phillips, Texas A&M University Researchers at Texas A&M University are exploring ways that lignin waste from pulp and paper operations can be transformed into carbon fibers used in a range of products from tennis rackets to automobiles.
News
Moving maintenance from reactive to proactive
My experience has taught me that most folks working in the pulp and paper industry don't have an understanding of what it takes to change a reactive maintenance department to a proactive and reliable one.
Journal articles
Optimization of optical coverage of board surfaces with assessment of light scattering and absorption using mineral as a coating component, TAPPI Journal June 2026
ABSTRACT: One of the primary functions of mineral inclusion into paper or paperboard is to improve the optical performance of the substrate. A coating may be applied to a sheet in order to cover a dark base, to improve the sheet opacity, to give the correct smoothness and gloss, or to give a suitable surface on which to print. The brightness of a pigment has long been used as a guide for pigment choice in paper and board. However, the measured paper brightness is a function of color and light absorption (K) of the coating and base and the light scattering (S) within the sheet resulting from interfaces with different refractive index. The optical performance can be quantified by measuring the S&K coefficients as described by the Kubelka-Munk model/theory in a filled or coated paper sheet. In coating, this is often assessed as a function of coat weight, and the corresponding physical sheet properties are assessed at the same time; for example, the correct gloss, smoothness, point-to-point uniformity, and printability. The optical performance in the sheet is often not directly related to the pigment brightness, but is largely a function of the particle packing within the sheet and coating layer. In the first and second main sections of this work, respectively, we show how S&K calculations from the Kubelka- Munk equations can be used in coated sheets to determine the optical performance and how this can be used as a predictive tool for the final sheet performance. This is presented for base sheets with different starting brightness. The third section of this work focuses on how mineral combinations in coatings can be used to improve the light scattering and consequently the optical performance of the board. We include theoretical considerations and then finally share a case study for improvement on the optical properties of recycled board.
Journal articles
Magazine articles
Considerations in managing wastewater odor at pulp and paper operations, TAPPI Journal March 2022
ABSTRACT: Many pulp and paper mills are, at least periodically, faced with the release of odors that can migrate offsite and be considered a nuisance by nearby residents. At chemical pulp mills, perceptible odors associated with reduced sulfur compounds (RSCs) are common, many of which are highly perceptible owing to their low odor thresholds. As releases of RSCs and other odorous substances from production processes are progressively controlled, the proportional contribution from wastewater treatment systems to areal odors can increase. This review paper summarizes important fundamentals of odor generation, source identification, and control. Common odorous substances are identified, and mechanisms for their generation are summarized. Approaches for measuring odorous substances are detailed to enable more effective management, and various odor control strategies are discussed.
Journal articles
Magazine articles
Evaluation of rice straw for purification of lovastatin, TAPPI Journal November 2021
ABSTRACT: Cholesterol synthesis in the human body can be catalyzed by the coenzyme HMG-CoA reductase, and lovastatin, a key enzyme inhibitor, can reduce hypercholesterolemia. Lovastatin can be obtained as a secondary metabolite of Aspergillus terreus ATCC 20542. In this study, rice straw of lignocellulose was used in aeration and agitation bath fermentation in a 1-L flask, and a maximal crude extraction rate of 473 mg/L lovastatin was obtained. The crude extract was treated with silica gel (230–400 mesh) column chromatography. Ethyl acetate/ethanol (95%) was used as the mobile phase, and isolation was performed through elution with various ethyl acetate/ethanol ratios. The highest production rate of 153 mg/L was achieved with ethyl acetate/ethanol in a ratio of 8:2. The lovastatin gained from the crude extract was added to 12 fractions treated with 0.001 N alkali, and acetone was then added. After 24 h of recrystallization at 4°C, the extract underwent high-performance liquid chromatography. The purity had increased from 25% to 84.6%, and the recovery rate was 65.2%.