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Formation and Control of Bleach Plant Scale as a Result of Water Minimization, 1998 Pulping Conference Proceedings
Formation and Control of Bleach Plant Scale as a Result of Water Minimization, 1998 Pulping Conference Proceedings
Journal articles
Magazine articles
Application of ATR-IR measurements to predict the deinking efficiency of UV-cured inks, TAPPI Journal January 2022
ABSTRACT: In recent years, ultraviolet (UV)-curable ink has been developed and widely used in various printing applications. However, using UV-printed products (UV prints) in recovered paper recycling causes end-product dirt specks and quality issues. A new method was developed that can distinguish UV prints from other prints by means of attenuated total reflectance infrared (ATR-IR) spectroscopy. Application of this method could allow more efficient use of UV prints as raw materials for paper recycling.First, a mill trial was performed using UV prints alone as raw materials in a deinked pulp (DIP) process. Second, test prints were made with four types of UV inks: a conventional UV ink and three different highly-sensitive UV inks. Each print sample had four levels of four-color ink coverage patterns (100%, 75%, 50%, and 25%). Next, deinkability of all prints was evaluated by laboratory experiments. Finally, each print was measured using the ATR-IR method, and the relationship between the IR spectra and deinkability was investigated. Mill trial results showed that UV prints caused more than 20 times as many dirt specks as those printed with conventional oil-based ink. There were variations in recycling performance among UV prints taken from bales used for the mill trial. Lab tests clearly revealed that not all UV-printed products lead to dirt specks. In order to clarify the factors that affected deinkability of UV prints, the print samples were investigated by lab experiments. Key findings from lab experiments include: • The number of dirt specks larger than 250 µm in diameter increased as the ink coverage increased. • Higher ink coverage area showed stronger intensity of ATR-IR spectral bands associated with inks. These results indicate that deinkability of UV prints could be predicted by analysis of ATR-IR spectra. • Finally, the method was applied for assessment of recovered paper from commercial printing presses. It was confirmed that this method made it possible to distinguish easily deinkable UV prints from other UV prints. Based on these findings, we concluded that the ATR-IR method is applicable for inspection of incoming recovered paper.
Conference papers
Preparation of Biosilica-enriched Filler and an Example of its Use in a Papermaking Retention System, 2006 International Conference on Nanotechnology
Preparation of Biosilica-enriched Filler and an Example of its Use in a Papermaking Retention System, 2006 International Conference on Nanotechnology
Changing to Pressure Sensitive Labeling, 1995 Finishing and
Changing to Pressure Sensitive Labeling, 1995 Finishing and Converting Conference Proceedings
Ultrasonic Systems for Liquid Absorption Measurements - Part.1. New Tester and Methodology for Mottle Problems, 2004 Coating and Graphic Arts Conference
Ultrasonic Systems for Liquid Absorption Measurements - Part.1. New Tester and Methodology for Mottle Problems, 2004 Coating and Graphic Arts Conference
Absorption of Starch During Surface Sizing with Different Methods, 1991 Coating Conference Proceedings
Absorption of Starch During Surface Sizing with Different Methods, 1991 Coating Conference Proceedings
Predicting Print Mottle: A Method of Differentiating Between
Predicting Print Mottle: A Method of Differentiating Between Three Distinctively Different Types of Mottle: Backtrap Mottle, Water Sensitivity Mottle, and..., 1994 Coating Conference Proceedings
Corrosion Behavior of Spirally and Longitudinally Welded Stainless Steel Pipes, 1993 Engineering Conference Proceedings
Corrosion Behavior of Spirally and Longitudinally Welded Stainless Steel Pipes, 1993 Engineering Conference Proceedings
Computer Model of a Roll Press Nip, 2000 Engineering Conference Proceedings
Computer Model of a Roll Press Nip, 2000 Engineering Conference Proceedings
Controlling Consistency of Paper Machine Stock and Broke Systems, 1997 Papermakers Conference Proceedings
Controlling Consistency of Paper Machine Stock and Broke Systems, 1997 Papermakers Conference Proceedings