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Magazine articles
Process safety management in the pulp and paper industry, TAPPI JOURNAL, August 1992, Vol. 75(8)
Process safety management in the pulp and paper industry, TAPPI JOURNAL, August 1992, Vol. 75(8)
Magazine articles
Completing the loop: action planning for continuous safety improvement, TAPPI JOURNAL, August 1992, Vol. 75(8)
Completing the loop: action planning for continuous safety improvement, TAPPI JOURNAL, August 1992, Vol. 75(8)
Magazine articles
Alberta newsprint and alberta research council bring deinking pilot plant on-stream, TAPPI JOURNAL, December 1992, Vol. 75(12)
Alberta newsprint and alberta research council bring deinking pilot plant on-stream, TAPPI JOURNAL, December 1992, Vol. 75(12)
Magazine articles
Improving the reliability of newsprint quality data using integrated factor networks for paper machine control and analysis, TAPPI JOURNAL, December 1992, Vol. 75(12)
Improving the reliability of newsprint quality data using integrated factor networks for paper machine control and analysis, TAPPI JOURNAL, December 1992, Vol. 75(12)
Magazine articles
Demand forecast for communication papers - 2000, TAPPI JOURNAL, June 1992, Vol. 75(6)
Demand forecast for communication papers - 2000, TAPPI JOURNAL, June 1992, Vol. 75(6)
Journal articles
Magazine articles
The evolution of reel statistical methods, TAPPI Journal June 2019
ABSTRACT: Multiple statistical methods for calculating the variance partition analysis (VPA) of reel data have existed for decades. In the paper industry, VPA is also commonly known as reel statistics. VPA commonly consists of total variance (TOT) that is then divided into three components: cross direction (CD), machine direction (MD), and residual (RES). A common mathematical procedure is referred to as ANOVA (analysis of variance). TAPPI Standard Test Method T 545 “Cross-machine grammage profile measurement (gravimetric method)” addresses paper testing and includes the ANOVA equations that have also been used to analyze scanning data.In the 1990s, TAPPI published TIP 1101-01 “Calculation and partitioning of variance using paper machine scanning sensor measurements,” which contained simple formulas that were easy to implement and could be used by a nov-ice to generate statistics on a spreadsheet. All involved quality control system (QCS) suppliers agreed to support this common method in their QCS. TIP 1101 was recently revised, and this paper concerns the analysis of data collected from a scanning sensor in a QCS and the creation of a common method for the calculation of reel statistics by TAPPI’s Process Control Division.
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.
Magazine articles
Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)
Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)
Magazine articles
The 200th anniversary of the paper machine, part ii: the second 100 years, TAPPI JOURNAL, December 1997, Vol. 80(12)
The 200th anniversary of the paper machine, part ii: the second 100 years, TAPPI JOURNAL, December 1997, Vol. 80(12)
Magazine articles
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)