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EQUILIBRIUM WITH TIME-TO-BUILD IN A COMPETITIVE INVESTMENT ENVIRONMENT - A REAL OPTIONS APPROACH TO INVESTMENT DECISION MAKING IN THE PULP AND PAPER INDUSTRY, 2008 Engineering, Pulping and Environmental Conference
EQUILIBRIUM WITH TIME-TO-BUILD IN A COMPETITIVE INVESTMENT ENVIRONMENT - A REAL OPTIONS APPROACH TO INVESTMENT DECISION MAKING IN THE PULP AND PAPER INDUSTRY, 2008 Engineering, Pulping and Environmental Conference
Drive Power and Torque in Papermachine Dryers, 2008 PAPERCON Conference
Drive Power and Torque in Papermachine Dryers, 2008 PAPERCON Conference
Combined Modeling And Experimental Studies To Optimize The Balance Between Fold Crack Resistance And Stiffness For Multilayered Paper Coatings - Part 1: Introduction And Modeling Studies, 2008 PAPERCON Conference
Combined Modeling And Experimental Studies To Optimize The Balance Between Fold Crack Resistance And Stiffness For Multilayered Paper Coatings - Part 1: Introduction And Modeling Studies, 2008 PAPERCON Conference
Conference papers
Characterization of Paperboard Formation using Soft X-radiog
Characterization of Paperboard Formation using Soft X-radiography and Image Analysis, PaperCon 2016
Effects of the Partial Replacement of SB latex with Dextrin Starch on the Thickness Distribution of Coating Layers, 2008 Advanced Coating Fundamentals Symposium
Effects of the Partial Replacement of SB latex with Dextrin Starch on the Thickness Distribution of Coating Layers, 2008 Advanced Coating Fundamentals Symposium
Novel Particle Size Characterization of Coating Pigments: Comparing Acoustic Spectroscopy with Laser Light Scattering and Sedimentation Techniques, 2008 Advanced Coating Fundamentals Symposium
Novel Particle Size Characterization of Coating Pigments: Comparing Acoustic Spectroscopy with Laser Light Scattering and Sedimentation Techniques, 2008 Advanced Coating Fundamentals Symposium
STRESS CORROSION CRACKING OF STAINLESS STEEL IN CONTINUOUS DIGESTERS, 2008 Engineering, Pulping and Environmental Conference
STRESS CORROSION CRACKING OF STAINLESS STEEL IN CONTINUOUS DIGESTERS, 2008 Engineering, Pulping and Environmental Conference
Conference papers
Real-time Paper and Paperboard Quality Analysis and Classification based on Paper Formation or Surface Appearance in Web Inspection System, 19PaperCon
Real-time Paper and Paperboard Quality Analysis and Classification based on Paper Formation or Surface Appearance in Web Inspection System, 19PaperCon
Journal articles
Magazine articles
Preparing prehydrolyzed kraft dissolving pulp via phosphotungstic acid prehydrolysis from grape branches, TAPPI Journal January 2022
ABSTRACT: Dissolving pulp was successful prepared via phosphotungstic acid (PTA) prehydrolysis kraft (PHK) cooking followed by an elementary chlorine-free (ECF) bleaching process from grape branches. The effects of prehydrolysis temperature, reaction time, and PTA concentration that potentially affect the quality of dissolving pulp product on chemical components of pulp were studied via an orthogonal experiment. The structure of lignin was activated during the PTA prehydrolysis phase, and lignin was easily removed during the following cooking process. Thus, relatively mild conditions (140°C, 100 min) can be used in the cooking process. During the prehydrolysis phase, temperature exhibited the most significant influence on the cellulose purity of the obtained pulp fiber, followed by reaction time and PTA concentration. The optimized prehydrolysis conditions were as follows: prehydrolysis temperature, 145°C; reaction time, 75 min; and PTA concentration, 1 wt%. Whether the excessively high prehydrolysis temperature or prolonging the reaction time did not favor the retention of long chain cellulose, the delignification selectivity for the cooking process could not be further improved by excessive PTA loading. Under these prehydrolysis conditions, 94.1% and 29.0% for a-cellulose content and total yield could be achieved after the given cooking and bleaching conditions, respectively. Moreover, the chemical structure and crystal form of cellulose were scarcely changed after PTA prehydrolysis, which could be confirmed by results from Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). PTA prehydrolysis could be considered as an alternative method for preparing PHK dissolving pulp under relatively mild cooking conditions.
Journal articles
Magazine articles
The use of minerals in fiber-based packaging and pulp molding, TAPPI Journal January 2024
ABSTRACT: Minerals are widely used in the pulp and paper industry for aiding the processing, economics, and final quality of fiber-based products. Among these, calcium carbonate, talc, and kaolin are widely used as fillers, and these can have varying brightness, particle size distributions, and aspect ratios. For the molded fiber area, these minerals can raise the solids content of the pulp mixture and improve throughput and lower energy requirements for drying. Talc is also widely used as a process control agent, picking up pitch and stickies and improving productivity by lowering machine cleaning time.The replacement of single use plastic with fiber-based replacements is a global trend; however, it does come with some significant challenges, such as grease and moisture proofing. Previously, per- and polyfluoroalkyl substances (PFAS) have been used to provide functions such as water and grease repellency, but regulatory demands have seen its demise in the packaging industry. Therefore, water holdout is now generally achieved by addition of alkyl ketene dimer (AKD) sizing. Wax additives are being developed and tested as PFAS replacements for oil and grease resistance. Rather than strongly repelling lipids from the fiber surface, these PFAS alternatives restrict flow pathways and react with food oils to alter their flow characteristics to prevent penetration through the substrate. During studies incorporating both PFAS substitutes and minerals, no detrimental interactions were observed. This paper addresses the different needs of the molded fiber market by including mineral fillers in molded fiber articles and will be presented as a series of different case studies. In all studies, we show that the trends observed when mineral filler is added to molded fiber are broadly similar to those seen in conventional paper and paperboard applications. Mineral addition in all studies gave improvements in productivity and optical appearance. With its organophilic surface, hydrophobic talc had the additional advantage of pitch and sticky control, and although a small decrease in strength was always observed when filler was added, the final articles still retained sufficient strength for their particular application. This small strength reduction should be balanced against the productivity gains.