Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Troubleshooting Rheology Problems in Metered Size Press, 2000 Metered Size Press Forum
Troubleshooting Rheology Problems in Metered Size Press, 2000 Metered Size Press Forum
US and International Standards for High Pressure Decorative Laminate, 2008 TAPPI Decorative & Industrial Laminates Symposium
US and International Standards for High Pressure Decorative Laminate, 2008 TAPPI Decorative & Industrial Laminates Symposium
Technological Trends in Panel Finishing, 2008 TAPPI Decorative & Industrial Laminates Symposium
Technological Trends in Panel Finishing, 2008 TAPPI Decorative & Industrial Laminates Symposium
Journal articles
Magazine articles
Techno-economic analysis of hydrothermal carbonization of pulp mill biosludge, TAPPI Journal March 2023
ABSTRACT: For many mills, the biosludge from wastewater treatment is difficult to recycle or dispose of. This makes it a challenging side stream and an important issue for chemical pulping. It often ends up being burned in the recovery or biomass boiler, although the moisture and non-process element (NPE) contents make it a problematic fuel. Biosludge has proven resistant to attempts to reduce its moisture. When incinerated in the biomass boiler, the heat from dry matter combustion is often insufficient to yield positive net heat. Mixing the sludge with black liquor in the evaporator plant for incineration in the recovery boiler is more energy efficient, but is still an additional load on the evaporator plant, as well as introducing NPEs to the liquor. In this study, treating the biosludge by hydrother-mal carbonization (HTC), a mild thermochemical conversion technology, is investigated. The HTC process has some notable advantages for biosludge treatment; taking place in water, it is well suited for sludge, and the hydrochar product is much easier to dewater than untreated sludge. In this study, two HTC plant designs are simulated using IPSEpro process simulation software, followed by economic analysis. Low temperature levels are used to minimize investment costs and steam consumption. The results show that if the sludge is incinerated in a biomass boiler, payback periods could be short at likely electricity prices. The HTC treatment before mixing the sludge with black liquor in the evaporator plant is profitable only if the freed evaporator capacity can be used to increase the firing liquor dry solids content.
Journal articles
Magazine articles
Quantification of the degree of preference for different tissue products based on a hand-felt tissue test panel, TAPPI Journal May 2023
ABSTRACT: In this study, we successfully established a quantification model to determine the preference (PF) for different tissue products based on the results of a hand-felt tissue testing panel. The panel ascertained that products designed with four-ply tissues provided higher total tensile strength (TTS) and hand-felt surface softness (HSS) than did those of the three-ply, two-ply, and single-ply products.When practically tested with a tissue softness analyzer (TSA), the four-ply tissue product had a softness (TSA-HF) advantage; however, in human panel tests, more than half of the participants could not be sure of the hand-felt bulk softness (HBS) of the four-ply tissue product. This was mainly because when using the four-ply tissue, the hand-held test pad gave an overall perception distinctly different from those of the hand-held two- or three-ply products, which also differed from the flattened state of test pieces used in the instrumental softness tests. Users could distinctly feel that a product was safer (better TTS) and more comfortable (higher hand-held surface softness). Thus, the four-ply tissue product was accorded a higher preference.
Journal articles
Magazine articles
Research on flame-retardant paper prepared by the method of in-pulp addition of ammonium polyphosphate, TAPPI Journal May 2023
ABSTRACT: At present, the production of flame-retardant paper usually uses the impregnation method of phosphorus-nitrogen flame retardants in paper. There are few reports on the application of an in-pulp addition method. In this paper, the solubility of ammonium polyphosphate (APP) and its effect on flame-retardant paper were investigated for use in an in-pulp addition method. It was found that APP particles were square, with an average particle size of 21.88 µm. The particle size decreased significantly after immersion in water at 25°C for 24 h. Furthermore, most of the APPs were dissolved after immersion in water at 90°C for 0.5 h, and the residuals agglomerated and their shape turned into an amorphous form. The APP possessed strong electronegativity and could partially ionize in water. The solubility of APP was 0.18 g/100 mL water at 25°C and increased quickly when the temperature was higher than 30°C. Therefore, APP should be added to the pulp at temperatures below 30°C. The tensile strength of the paper initially increased with the addition of APP, and it reached the maximum value when the APP content was 10% and then gradually decreased. The limiting oxygen index (LOI) value of the paper was 28.7% when the added amount of APP was 30% and cationic polyacrylamide (CPAM) was 0.08%, reaching the flame-retardant level.
NONWOVEN STRUCTURAL INSULATED PANELS FOR CONSTRUCTION APPLICATIONS, 2011 Innovative Nonwovens Conference
NONWOVEN STRUCTURAL INSULATED PANELS FOR CONSTRUCTION APPLICATIONS, 2011 Innovative Nonwovens Conference
Multifunctional Cotton Fabric: Antimicrobial and Durable Press Finish, 2011 Innovative Nonwovens Conference
Multifunctional Cotton Fabric: Antimicrobial and Durable Press Finish, 2011 Innovative Nonwovens Conference
Electronic Nonwovens by Atomic Layer Deposition, 2011 Innovative Nonwovens Conference
Electronic Nonwovens by Atomic Layer Deposition, 2011 Innovative Nonwovens Conference
Filtration Efficiency of the Composite Media Prepared by Meltblown & Electrospun Nanofibers, 2011 Innovative Nonwovens Conference
Filtration Efficiency of the Composite Media Prepared by Meltblown & Electrospun Nanofibers, 2011 Innovative Nonwovens Conference