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Journal articles
A laboratory-scale automated vacuum-assisted device for coating of cellulose nanofibrils onto paper, TAPPI Journal November 2025
ABSTRACT: An automated vacuum-assisted coating system was developed to deposit cellulose nanofibril (CNF) layers onto paper substrates, simulating potential industrial geometries while allowing precise control of web speed (10•20 m/min), vacuum time (up to 30 s), and applicator gap (0.5•0.9 mm). Vacuum assistance makes it possible to obtain coat weights over 5 g/m2 in a single pass and increases solids after coating from less than 10% to over 28%• 30%, reducing drying demand by more than 60%. Coat weights were tuned from 6 to over 11 g/m² by varying suspension solids (0.4•0.6 wt%), line speed, and filtration length (20•40 mm), with strong agreement between experimental data and model predictions. Barrier testing showed Kit test values for double folded samples of 9•12 and Gurley air resistances above 4 × 104 s once coat weights exceeded 7 g/m². Comparable performance was achieved with lower fines content CNF (60%) by increasing coat weight, providing technical flexibility and cost advantages for industrial scale-up.
Journal articles
Designing paper and board barrier constructions for food contact applications, TAPPI Journal November 2025
ABSTRACT: This study examines the effect of multiple factors on barrier performance for purpose-built paper and paperboard constructions produced on an industrial pilot coater machine. Impacts from precoat latex chemistry, application method (flooded nip with bevel blade, jet with bevel blade, and pre-metered film coater, laboratory rod drawdown) and precoating calendering were studied in relation to resulting porosity, roughness, and barrier (liquid water, moisture, and oil). Results reveal a complex interaction between controllable and uncontrollable factors, offering insight for designing advanced barrier coatings on cellulosic substrates.
Journal articles
Qualification of Welding Procedures for Duplex Stainless Ste
Qualification of Welding Procedures for Duplex Stainless Steels, 1999 Engineering Conference Proceedings
Journal articles
Steambox Comparator Experiments: Apparatus Validation and In
Steambox Comparator Experiments: Apparatus Validation and Investigation of Steambox Performance, 1999 Engineering Conference Proceedings
Journal articles
Determination of drainage resistance coefficients under known shear rate, TAPPI JOURNAL, August 2002 (268KB)
Determination of drainage resistance coefficients under known shear rate, Solutions! & TAPPI JOURNAL, August 2002 (268KB)
Journal articles
Focused beam reflectant measurement as a tool to measure flocculation, TAPPI JOURNAL, December 2002, Vol. 1(10) (324KB)
Focused beam reflectant measurement as a tool to measure flocculation, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (324KB)
Journal articles
Effects of temperature and moisture content on paper behavio
Effects of temperature and moisture content on paper behavior in the nip, TAPPI JOURNAL, December 2002, Vol. 1(10) (255KB)
Journal articles
Effect of geometry and thermal boundary conditions on calend
Effect of geometry and thermal boundary conditions on calender roll thermal deformation, TAPPI JOURNAL, December 2002, Vol. 1(10) (247KB)
Journal articles
Calendering model for CD control, TAPPI JOURNAL, December 2002, Vol. 1(10) (434KB)
Calendering model for CD control, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (434KB)
Journal articles
The effect of slot shape on the performance of a pressure screen, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (1836KB)
The effect of slot shape on the performance of a pressure screen, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (1836KB)