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Effect of Enzyme Pretreatments on Conventional Kraft Pulping, 1997 Pulping Conference Proceedings
Effect of Enzyme Pretreatments on Conventional Kraft Pulping, 1997 Pulping Conference Proceedings
Flotation Deinking of Toner-Printed Papers Using Frother Spray, 1998 Pulping Conference Proceedings
Flotation Deinking of Toner-Printed Papers Using Frother Spray, 1998 Pulping Conference Proceedings
Lessons Learned from the Process of Developing and Evaluating the New Generation Pressure Sensitive Adhesives, 2000 Recycling Symposium Proceedings
Lessons Learned from the Process of Developing and Evaluating the New Generation Pressure Sensitive Adhesives, 2000 Recycling Symposium Proceedings
Agile Manufacturing and its Implications for the Choice of Machinery and Process Controls, 2000 Papermakers Conference Proceedings
Agile Manufacturing and its Implications for the Choice of Machinery and Process Controls, 2000 Papermakers Conference Proceedings
Webinars
Data-Driven Decision Making with Process Analytics - Making sense of big data in the pulp and paper industry
Data-Driven Decision Making with Process Analytics - Making sense of big data in the pulp and paper industry This webinar aims to establish best practices for data-driven decision-making in the pulp
Filtration efficiency and breathability of selected face masks, TAPPI Journal September 2023
ABSTRACT: Face masks have been used as physical barriers to stop respiratory infections for many years. Due to insufficient and low supply of certified masks, alternative face covers such as face shields, neck gaiters, and fabric reusable masks gained attention during the COVID-19 pandemic. However, for these alternate face masks to fulfill their intended function, they must be effective. Additionally, the level of breathability provided by the makeshift masks must be at a certain level. The work reported in this paper was carried out to determine the relationship between filtration efficiency (FE), breathability, and important physical characteristics of mask substrates. The fiber diameter of the core filter layer was determined using a scanning electron microscope. Five types of face masks (two types of N95, two types of surgical masks, and a 100% knitted cotton fabric) were tested for their FE and breathability using moisture vapor transmission rate (MVTR). The cotton knitted mask had the lowest FE (5.10%•26.47%), while the National Institute for Occupational Safety and Health (NIOSH)-certified N95 mask had the highest FE values (92.10%•99.65%). However, the cotton mask outperformed the N95 in terms of the pressure drop, meaning higher comfort. In general, the N95 face mask provided the best protection against aerosolized particles. According to the regression analysis, the fiber diameter of the mask filter substrate serves as an important predictor of FE of mask substrates. In this study, it was confirmed that fiber diameter is inversely related to the filtration ability. Results show that compact structure with finer fibers will enable higher filtration efficiency. The study lends itself to developing layered face masks to obtain optimum filters with good filtration, better fit, and acceptable comfort for the wearer.
Energy Reduction at a Kraft Mill: Examining the Effects of Process Integration, Benchmarking, and Water Reduction, 2004 Engineering, Pulping, and PCE&I Conference
Energy Reduction at a Kraft Mill: Examining the Effects of Process Integration, Benchmarking, and Water Reduction, 2004 Engineering, Pulping, and PCE&I Conference
Pulp and Paper Multi-Site-Asset Care Implementation, 1996 En
Pulp and Paper Multi-Site-Asset Care Implementation, 1996 Engineering Conference Proceedings
Energy Management Optimizations Using Multi-Variable Fuzzy Logic Control, 1997 Engineering Conference Proceedings
Energy Management Optimizations Using Multi-Variable Fuzzy Logic Control, 1997 Engineering Conference Proceedings
Metallurgy and Fatigue Principles Applied to CTMP Pressate Roll Corrosion Fatigue, 1991 Engineering Conference Proceedings
Metallurgy and Fatigue Principles Applied to CTMP Pressate Roll Corrosion Fatigue, 1991 Engineering Conference Proceedings