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Journal articles
Open Access
The influence of water on the elastic modulus of paper, TAPPI JOURNAL, December 1996, Vol. 79(12)

The influence of water on the elastic modulus of paper, TAPPI JOURNAL, December 1996, Vol. 79(12)

Journal articles
Open Access
Development of a nonwoven filter for separation of serum from whole blood for medical diagnostic applications, TAPPI JOURNAL, December 1996, Vol. 79(12)

Development of a nonwoven filter for separation of serum from whole blood for medical diagnostic applications, TAPPI JOURNAL, December 1996, Vol. 79(12)

Journal articles
Open Access
Water, water everywhere, but does it need to be that way?, TAPPI JOURNAL, December 1996, Vol. 79(12)

Water, water everywhere, but does it need to be that way?, TAPPI JOURNAL, December 1996, Vol. 79(12)

Journal articles
Open Access
Tasmania's north forest products turns northern Tasmania into as fiber wonderland, TAPPI JOURNAL, December 1996, Vol. 79(12)

Tasmania's north forest products eyes eucalypts as fiber resource, TAPPI JOURNAL, December 1996, Vol. 79(12)

Journal articles
Open Access
Paper machine bearing failure, TAPPI JOURNAL, February 1996, Vol. 79(2)

Paper machine bearing failure, TAPPI JOURNAL, February 1996, Vol. 79(2)

Journal articles
Open Access
An empirical study of blade coating at 2250 m/min, TAPPI JOURNAL, February 1996, Vol. 79(2)

An empirical study of blade coating at 2250 m/min, TAPPI JOURNAL, February 1996, Vol. 79(2)

Journal articles
Open Access
On-line soft-nip calendering and supercalendering: effects of coating formulation and operating variables, TAPPI JOURNAL, February 1996, Vol. 79(2)

On-line soft-nip calendering and supercalendering: effects of coating formulation and operating variables, TAPPI JOURNAL, February 1996, Vol. 79(2)

Journal articles
Open Access
A laboratory white pitch deposition test for screening additives, TAPPI JOURNAL, February 1996, Vol. 79(2)

A laboratory white pitch deposition test for screening additives, TAPPI JOURNAL, February 1996, Vol. 79(2)

Journal articles
Magazine articles
Open Access
Review of coating cracking and barrier integrity on paperboard substrates, TAPPI Journal November 2022

ABSTRACT: Barrier packaging formats are major growth areas for the pulp and paper industry. It is technically challenging to maintain barrier properties during converting and end-use applications. Improved manufacturing capabilities and coating formulation knowledge will help maintain barrier integrity and enable growth of barrier products in challenging applications. These improvements will accelerate product development and commercialization, and allow faster response to product performance issues such as cracking. The literature on coating cracking provides knowledge mostly on the effects of coating formulations and to a lesser extent on substrate effects. Despite a large number of publications dedicated to coating failures, the approach to improve coating cracking remains empirical, and the transferability between studies and to real life applications has not been well established. Model development that successfully predicts commercial performance is in its infancy. However, some of these simplified models do a fairly good job predicting experimental data. The current work reviews the state of understanding as regards coating and barrier cracking and highlights the need for more research on cracking and barrier integrity.

Journal articles
Magazine articles
Open Access
Modeling the influence of rheology on smooth rod coating systems, TAPPI Journal November 2022

ABSTRACT: Rod coating methods are of interest for the application of barrier coatings, especially at off-line facilities that may run at moderate speeds and narrow web widths. At lower line speeds and lower coating solids, it is difficult to achieve good coat weight control because of poor loading of the rod. While there is extensive literature available about blade and roll coating, there seems to be less reported on the rod loading of smooth rods to obtain various coat weights. Much of the work is around metering rods working on applicator rolls at high speeds that are associated with the metered size press, with a focus on ribbing instabilities. This work employs a simplified model, neglecting some complex features of rubber deformation and film split, to estimate the influence of the process parameters such as speed, rod diameter, viscosity, and rod loading on the coat weight obtained. As found in practice, at low speed and low viscosities, the coat weight-load curve is steep, leading to poor control of the coat weight and coat weight uniformity. If the viscosity is increased, the curve is modified, and control is possible with rod loading in a normal range. For shear thinning fluids described by the Carreau model, the power law index and other parameters need to be in the correct range to obtain the desired effect. Modeling predictions show a steeper dependence of coat weight with rod pressure when compared to pilot coater data. This may be caused by missing details in the mechanical loading of the rod related to tube pressure or from neglecting the impact of filter cake formation of the applied coating in the model.

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