Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Journal articles
Magazine articles
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.
Journal articles
Magazine articles
Controllable anisotropic properties of wet-laid hydroentangled nonwovens, TAPPI Journal March 2019
ABSTRACT: For nonwovens, fiber orientation distribution is an important structural characteristic that directly influences the anisotropic properties of the materials. Different Vslurry/Vbelt ratios were adopted to fabricate nonwovens during the wet-laid process. The results indicated that fiber orientation distribution of nonwovens can be regulated by adopting different Vslurry/Vbelt ratios owing to the web-forming principle of wet-laid techniques. Mechanical tests showed that both wet and dry tensile strength of nonwovens in different angle directions present anisotropy under different Vslurry/Vbelt ratio parameters. A liquid spreading distribution experiment proved that liquid spreading length and area of nonwovens could be manipulated using different Vslurry/Vbelt ratios in the fabrication process. Therefore, specific anisotropic properties of wet-laid hydroentangled nonwovens can be realized by controlling the process parameters for particular end-use applications.
Journal articles
Magazine articles
Size distribution analysis of microstickies treated by enzyme mixtures in papermaking whitewater, TAPPI Journal March 2019
ABSTRACT: Microstickies present a formidable challenge for papermakers. Many strategies have been explored o control them. Enzyme treatment is a promising technology, but the mechanism of its action has not been determined, thus inhibiting further application of this new technology. This study investigated characteristics and size distributions of microstickies treated by esterase-cellulase mixtures. Determination of particle size and number was accomplished using a modified flow cytometer, which combined streaming capillary flow, laser-based particle size analysis and fluorescent dye tracing. The results showed that treatment of samples with enzyme mixtures induced size reduction of the larger microstickies. This effect was most dramatic for 1:1 ratios of esterase to cellulase. The treated particles were more stable than untreated ones. The smaller microstickies treated with some ratios of esterase and cellulase tended to aggregate over time.
Journal articles
Magazine articles
Sources, collection, and handling of noncondensible gases in modern kraft pulp mills
ABSTRACT: This work describes and discusses sources of noncondensible gases (NCG) in modern kraft pulp mills and modern NCG collection from process units where odor emissions can occur if these gases are released to the surroundings. A mill-wide overview of NCG sources and collection in modern pulp mills is provided. Using modern practices, malodorous gases can be collected to the extent that a pulp mill is essentially odor free. The key to limiting complaint-causing odors is prevention of these emissions during process disturbances, equipment malfunctions, operator errors, and other unforeseen occurrences.
Journal articles
Magazine articles
Editorial: Diverse content characterizes PaperCon 2019, TAPPI Journal November 2019
ABSTRACT: PaperCon 2019 was held from May 5-8 in Indianapolis, IN. Many of us visiting Indianapolis had little or no perception of the area beyond, of course, race cars and good sports teams. We also found a lovely, walkable downtown with a myriad of restaurants, parks, historic sites, and state government. As with the diverse offerings of PaperCon 2019’s host city of Indianapolis, the conference technical program was exceptionally broad this year. In this special issue of TAPPI Journal, we share both the breadth and quality of the content presented at PaperCon 2019 through peer-reviewed papers from the conference, as described below.
Journal articles
Magazine articles
Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018
Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018
Journal articles
Magazine articles
Editorial: Remembering Phil Clark: A Coating “Master Man”, TAPPI JOURNAL July 2018
Editorial: Remembering Phil Clark: A Coating “Master Man”, TAPPI JOURNAL July 2018
Journal articles
Magazine articles
Editorial: TAPPI Journal 2017 Best Research Paper Award recognizes recycling technology, TAPPI JOURNAL June 2018
Editorial: TAPPI Journal 2017 Best Research Paper Award recognizes recycling technology, TAPPI JOURNAL June 2018
Journal articles
Magazine articles
Decreased water usage in a softwood ECF bleaching sequence— full mill simulations, TAPPI JOURNAL June 2018
Decreased water usage in a softwood ECF bleaching sequence— full mill simulations, TAPPI JOURNAL June 2018
Journal articles
Magazine articles
Controlling porosity and density of nanocellulose aerogels for superhydrophobic light materials, TAPPI JOURNAL March 2018
Controlling porosity and density of nanocellulose aerogels for superhydrophobic light materials, TAPPI JOURNAL March 2018