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Improvements in oil and grease resistance (OGR) test methodology for waterborne barrier coatings, TAPPI Journal November 2022

ABSTRACT: Paper-based food packaging is becoming more popular due to consumer demands for sustainable packaging options. Waterborne paper coatings that provide performance properties (i.e., resistance to oil and grease) not inherent to paper and board substrates offer improved sustainability profiles over earlier paper treatment options, including fluorocarbon treatment and coating with extruded plastics. The continued development of new paper coating technologies requires re-evaluation of current test methods and development of new methods to ensure lab evaluations can serve as accurate predictors of real-world performance. This paper provides an overview of commonly used oil and grease resistance (OGR) test methods within the paper coatings industry, and then describes improvements and developments made to two key methods: the 3M Kit test and an internally developed oil breakthrough test. The combined use of these adapted methods provides a more efficient testing workflow and a more complete understanding of the OGR performance of barrier coatings.

The Paper360° Top 75, Paper360º November/December 2022

The Importance of Sustainable, Working Forests for Paper and Packaging, Paper360º November/December 2022

Over the Wire, Paper360º March/April 2023

Co-ground mineral/microfibrillated cellulose composite materials: Recycled fibers, engineered minerals, and new product forms, TAPPI Journal January 2021

ABSTRACT: When pulp and minerals are co-processed in suspension, the mineral acts as a grinding aid, allowing costeffective production of mineral/microfibrillated cellulose (MFC) composite materials. This processing uses robust milling equipment and is practiced at industrial scale. The resulting products can be used in many applications, including as wet- and dry-strength aids in paper and board production.Previously, we have reported that use of these MFC composite materials in fiber-based applications allow generally improved wet and dry mechanical properties with concomitant opportunities for cost savings, property improvements, or grade developments. Mineral/MFC composites made with recycled pulp feedstocks were shown to offer at least equivalent strength aid performance to composites made using virgin fibers. Selection of mineral and fiber allows preparation of mineral/MFC composites with a range of properties. For example, the viscosity of such formulations was shown to be controlled by the shape factor of the mineral chosen, effective barrier formulations were prepared, and mineral/MFC composites with graphite as the mineral were prepared.High-solids mineral/MFC composites were prepared at 75% total solids (37% fibril solids). When resuspended and used for papermaking, these high-solids products gave equivalent performance to never-dried controls.

Indonesian update: a country in change, an industry in recovery, TAPPI JOURNAL, September 1998, Vol. 81(9)

Indonesian update: a country in change, an industry in recovery, TAPPI JOURNAL, September 1998, Vol. 81(9)

An overview of the south african pulp and paper industry, TAPPI JOURNAL, April 1999, Vol. 82(4)

An overview of the south african pulp and paper industry, TAPPI JOURNAL, April 1999, Vol. 82(4)

Retention aids for highspeed paper machines, TAPPI JOURNAL, April 1999, Vol. 82(4)

Retention aids for highspeed paper machines, TAPPI JOURNAL, April 1999, Vol. 82(4)

Good manufacturing practices in recycled paper and paperboard production for use in food packaging, TAPPI JOURNAL, August 1999, Vol. 82(8)

Good manufacturing practices in recycled paper and paperboard production for use in food packaging, TAPPI JOURNAL, August 1999, Vol. 82(8)

A guide to developing a best management practices (bmp) plan for spent liquor, part II, TAPPI JOURNAL, December 1999, Vol. 82(12)

A guide to developing a best management practices (bmp) plan for spent liquor, part II, TAPPI JOURNAL, December 1999, Vol. 82(12)