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Journal articles
Magazine articles
Open Access
Web instability in the open draw and the impact on paper machine efficiency, TAPPI Journal May 2022

ABSTRACT: Paper is most likely to break in the first open draw on a paper machine where it is unsupported, wettest, and weakest. Tension is applied to peel the web from the roll surface, as well as minimize web flutter in the open draw. The average tension is well below the breaking point and is often set by adjusting the speed difference between the press and the next machine element by visually observing the behavior of the web. However, machine direction variations caused by instabilities in the paper machine can cause tension swings that exceed the strength of the web. Measurement of the web’s release point from press rolls on pilot and commercial paper machines was used to identify the cause of tension instabilities. Variations in the speed of the paper machine drives and the work of adhesion from the press roll surface were identified as key factors. Fluctuations of paper moisture, which affects the elastic modulus and strength of the web, appear to be less important.

Journal articles
Magazine articles
Open Access
Editorial: The road to sustainable packaging: New research on aqueous barrier coating, TAPPI Journal November 2022

Authors: Joel C. Panek and Peter W. Hart | ABSTRACT: This TAPPI Journal Special Coating Issue looks at hot topic research being done in coatings for paper and paperboard. We can feel the “earth shifting” in paper and paper-board packaging due to the strong call by consumers and brand owners for more sustainable and environmentally friendly options. This is the first TAPPI Journal Special Coating Issue to highlight efforts within the paper coating community to produce more sustainable packaging.

Journal articles
Magazine articles
Open Access
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
Open Access
Combined effect of fiber fines and dissolved organics on tissue properties, TAPPI JOURNAL April 1988 88APR141

Combined effect of fiber fines and dissolved organics on tissue properties, TAPPI JOURNAL April 1988

Journal articles
Open Access
Dryer sheet stability for older paper machines, TAPPI JOURNAL August 1988

Dryer sheet stability for older paper machines, TAPPI JOURNAL August 1988

Journal articles
Open Access
Correlating the on-line measurement of ultrasonic velocity with strength properties, TAPPI JOURANL April 1988 88APR149

Correlating the on-line measurement of ultrasonic velocity with strength properties, TAPPI JOURANL April 1988

Journal articles
Open Access
Measurement of strains in a paper tensile specimen using computer vision and digital image correlation-Part 2: Tensile specimen test, TAPPI JOURNAL April 1988 88APR153

Measurement of strains in a paper tensile specimen using computer vision and digital image correlation-Part 2: Tensile specimen test, TAPPI JOURNAL April 1988

Journal articles
Open Access
Fourth press operation in Japan, TAPPI JOURNAL April 1988 88APR83

Fourth press operation in Japan, TAPPI JOURNAL April 1988

Journal articles
Open Access
Energy savings through hot pressing, TAPPI JOURNAL April 1988 88APR89

Energy savings through hot pressing, TAPPI JOURNAL April 1988

Journal articles
Open Access
Automatic winder slitter positioning using a programmable logic controller, TAPPI JOURNAL August 1988

Automatic winder slitter positioning using a programmable logic controller, TAPPI JOURNAL August 1988

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