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Conference papers
The Maintenance Dept. vs The Maintenance Function, 18PaperCon
The Maintenance Dept. vs The Maintenance Function, 18PaperCon
Conference papers
A Comparison of Synthetic Amorphous Silica (SAS) Paper Pigments and introduction of a Novel Sub-Micron PrecipitatedSilica (SMPS) for Glossy High Speed Ink Jet Media, 18PaperCon
A Comparison of Synthetic Amorphous Silica (SAS) Paper Pigments and introduction of a Novel Sub-Micron PrecipitatedSilica (SMPS) for Glossy High Speed Ink Jet Media, 18PaperCon
Conference papers
Calcined Clay: An Effective Alternative to TiO2 in Paper and Board, 18PaperCon
Calcined Clay: An Effective Alternative to TiO2 in Paper and Board, 18PaperCon
Conference papers
A New Model and Approach for Optimizing Barrier Properties in Paper Coatings and Extruded Films, 18PaperCon
A New Model and Approach for Optimizing Barrier Properties in Paper Coatings and Extruded Films, 18PaperCon
Magazine articles
Leveraging mill-wide big data sets for process and quality i
Authors: Jianzhong Fu and Peter W. Hart | ABSTRACT: The MWV mill in Covington, VA, USA, experienced a long term trend of increasing episodes of paper indents that resulted in significant quantities of internal rejects and production downtime. When traditional troubleshooting techniques failed to resolve the problem, big data analysis techniques were employed to help deter-mine root causes of this negative and increasingly frequent situation. Nearly 6000 operating variables were selected for a deep dive, multi-year analysis after reviewing mill-wide process logs and 60000+ PI tags (data points) collected from one of the major data historian systems at the MWV Covington mill. Nine billion data points were collected from November 2011 to August 2014. Strategies and methods were developed to format, clean, classify, and sort the various data sets to compensate for process lag time and to align timestamps, as well as to rank potential causes or indicators. GE Intelligent Platforms software was employed to develop decision trees for root cause analysis. Insights and possible correlations that were previously invisible or ignored were obtained across the mill, from pulp-ing, bleaching, and chemical recovery to the papermaking process. Several findings led the mill to revise selected process targets and to reconsider a step change in the drying process. These changes have exhibited significant impacts on the mill’s product quality, cost, and market performance. Mill-wide communications of the identified results helped transform the findings into executable actions. Several projects were initiated.
Journal articles
Magazine articles
RISI's North American CEO of the Year, Paper360º November/De
RISI's North American CEO of the Year, Paper360º November/December 2016
Journal articles
Magazine articles
Nonwood Fiber: Growth and Opportunity, Paper360º November/D
Nonwood Fiber: Growth and Opportunity, Paper360º November/December 2016
Journal articles
Magazine articles
The Next-Generation QCS, Paper360º November/December 2016
The Next-Generation QCS, Paper360º November/December 2016
Journal articles
Magazine articles
Effects of hydrodynamic shear during formation of paper sheets with the addition of nanofibrillated cellulose, cationic starch, and cationic retention aid, TAPPI Journal September 2024
ABSTRACT: Laboratory tests were conducted to evaluate effects of hydrodynamic shear levels on papermaking process variables and paper handsheet properties. The furnish was from 100% recycled copy paper, to which was added nanofibrillated cellulose (NFC) at the 5% level following its optional pretreatment with cationic starch. A cationic copolymer of acrylamide (cPAM) was used as the retention aid. Different levels of hydrodynamic shear were applied both after mixing the NFC with the cationic starch (pre-shearing) or after all the furnish components had been combined (final shearing). The presence or absence of pre-shearing was found to have little effect on the measured outcomes. By contrast, increasing final shear hurt filler retention and made the resulting paper more uniform. However, the final shear level did not have a significant effect on the tensile strength of the resulting handsheets. Medium-charge density cationic starch, used in pretreating the NFC, consistently gave greater strength in comparison to a high-charge cationic starch. The significance of these findings is that though the relatively high hydrodynamic shear levels associated with modern paper machines can have some beneficial effects, they do not necessarily overcome all challenges associated with wet-end addition of nanocellulose in combination with other additives.