Search
Use the search bar or filters below to find any TAPPI product or publication.
Conference papers
Pulping Advantages of Zip-lignin Hybrid Poplar, 2016 Pulping
Pulping Advantages of Zip-lignin Hybrid Poplar, 2016 PEERS
Conference papers
Novel Technologies for Online Kappa Number Measurement Bring
Novel Technologies for Online Kappa Number Measurement Bring Opportunities for Improved Digester Control, 2016 PEERS
Conference papers
The Evolution of LignoBoost Technology and the Refining of L
The Evolution of LignoBoost Technology and the Refining of Lignin for End Product Uses • Part 1, 2016 PEERS
Conference papers
Developing LignoBoost for the end user lignin quality requir
Developing LignoBoost for the end user lignin quality requirements, 2017PEERS
Conference papers
Evaluation of Acid Stage and of Hydrogen Peroxide on Alkalin
Evaluation of Acid Stage and of Hydrogen Peroxide on Alkaline Extraction of Eucalyptus Kraft Pulp, 2017PEERS
Journal articles
Magazine articles
Viscoelastic web curl due to storage in wound rolls, TAPPI Journal July 2020
ABSTRACT: Winding is often the final operation in a roll-to-roll manufacturing process. Web materials, i.e., materials that are thin compared to their length, are wound into rolls because this form is the only practical means to store them. The resulting bending strains and associated stresses are large for thick webs and laminates. As many webs are viscoelastic on some time scale, bending stresses lead to creep and inhomogeneous changes in length. When the web material is unwound and cut into discrete samples, a residual curvature remains. This curvature, called curl, is the inability for the web to lie flat at no tension. Curl is an undesirable web defect that causes loss of productivity in a subsequent web process. This paper describes the development and implementation of modeling and experimental tools to explore and mitigate curl in homogenous webs. Two theoretical and numerical methods that allow the prediction of curl in a web are developed: a winding software based on bending recovery theory, and the implementation of dynamic simula-tions of winding. One experimental method is developed that directly measures the curl online by taking advantage of the anticlastic bending resulting from the curl. These methods are demonstrated for a low-density polyethylene web.
Journal articles
Magazine articles
Effects of tissue additives on copy paper forming and properties, TAPPI Journal February 2024
ABSTRACT: Laboratory tests were conducted in an effort to determine the effects on paper machine process attributes and the properties of paper made from recycled copy paper furnish upon the addition of chemical agents that are commonly used in the production of hygiene tissue products. Due to continuing growth in tissue and towel grades of paper, such agents are experiencing greater usage. Charge titration test results revealed that certain dry strength agents associated with tissue manufacturing have the potential to shift the balance of charge in papermaking furnish to less negative or even positive values. Creping adhesive was found to contribute to fine particle retention, especially when present at relatively high levels. Release aid and a polyacrylate dispersant had the opposite effect. Low addition levels of both a creping adhesive and a debonding agent surprisingly increased a wide range of strength attributes of paper handsheets in comparison to sheets prepared from unaltered recycled copy paper furnish. The debonding agent decreased paper strength at higher levels of addition. Such effects appear to depend not only on the expected effects of agents themselves, but also on how they affect the charge balance of the wet-end system.
Conference papers
Impact of Kraft Mill Chemistry on Economics: A Model-Based Approach to Optimizing Mill Profitability, 19PEERS
Impact of Kraft Mill Chemistry on Economics: A Model-Based Approach to Optimizing Mill Profitability, 19PEERS
Conference papers
Fluff Pulp Performance Improved by Alternative Pine Species, 19PEERS
Fluff Pulp Performance Improved by Alternative Pine Species, 19PEERS
Conference papers
Review of the Economics, Technologies and Products in the Non-wood Sector, 19PEERS
Review of the Economics, Technologies and Products in the Non-wood Sector, 19PEERS