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Journal articles
Practical aspects of yankee hood humidity control, TAPPI JOURNAL, April 1993, Vol. 76(4)
Practical aspects of yankee hood humidity control, TAPPI JOURNAL, April 1993, Vol. 76(4)
Journal articles
Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)
Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)
Journal articles
Size reversion in alkaline papermaking, TAPPI JOURNAL, August 1993, Vol. 76(8)
Size reversion in alkaline papermaking, TAPPI JOURNAL, August 1993, Vol. 76(8)
Journal articles
Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)
Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)
Journal articles
Drying and recycling of primary sludge at champion international, TAPPI JOURNAL, August 1993, Vol. 76(8)
Drying and recycling of primary sludge at champion international, TAPPI JOURNAL, August 1993, Vol. 76(8)
Journal articles
Pigmenting and soft calendering of printing papers, TAPPI JOURNAL, December 1993, Vol. 76(12)
Pigmenting and soft calendering of printing papers, TAPPI JOURNAL, December 1993, Vol. 76(12)
Journal articles
Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)
Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)
Journal articles
Magazine articles
Application of fuzzy TOPSIS in the Analyze phase of the DMAIC cycle to aid decision-making, TAPPI Journal April 2020
ABSTRACT: This paper reports the use of multicriteria analysis in the Analyze phase of the DMAIC (Define-Measure-Analyze-Improve-Control) cycle for continuous improvement. The research was carried out in a tissue paper factory located in southern Brazil. A sample of 64 parts of 16 different reels of recycled paper was used. A problem regarding paper quality variability was detected, presenting a scrap index ranging between 9% and 23%, compromising machine productivity and product sales. This motivated the implementation of a structured project supported by the application of the DMAIC cycle. The project team (machine operators, maintenance staff, supervisor, and data analyst) defined the evaluation criteria and determined the control intervals and their equivalence with linguistic variables to support the necessary evaluations for the application of fuzzy TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution). The criteria were C1-Longitudinal Strength (Kgf), C2-Longitudinal Elongation (mm), C3-Cross-strength (kgf), C4-Cross-elongation (mm), C5-Weight (g/m²), and C6-Humidity (%). The results showed that samples with the same ranking had the lowest scrap indexes in the subsequent process. Also, the criterion C5 had a more significant impact on the quality of the product than the other criteria, which was determined from the DMAIC sequence. Improvements related to C5 should be prioritized. The fuzzy TOPSIS method presented is a flexible tool, adapting itself to the solution of the problem and contributing to the decision-making process.
Journal articles
Machine Vision Applications Using Binary and Grayscale Morph
Machine Vision Applications Using Binary and Grayscale Morphology, 1994 Engineering Conference Proceedings
Journal articles
A method to produce paperboard with a lightweight low-density coating, TAPPI Journal November 2025
ABSTRACT: In this work, a method is described in which a coating layer is produced that consists of a network of bubble-shaped air-filled voids within the coating. This is accomplished by instantaneously flash-drying all the water in the coating as it exits the application nip. The nip is formed between a polished chrome drum and a deformable press roll. The combination of the drum temperature, nip pressure, and nip width allow for sufficient energy to be transferred to the coating to completely flash-dry the coating material. The pressure within the nip is sufficient to allow the coating to superheat within the nip, then flash boil as it exits the nip. This boiling effect and resulting expansion are constrained by the roll surface, resulting in a coated surface that mirrors the polished chrome surface. The coating immobilizes while in the process of boiling, which preserves the bubble structure. With a coat weight of 5 g/m2, a flat, smooth surface is produced. This process was scaled up to a mill production machine layout and run at speeds as high as 450 m/min.