Inventory audit notice: TAPPI Press orders will not be processed from August 21–28 during our fiscal year-end inventory audit. Orders placed during this time will ship starting August 31, in the order received. Normal payment processing also resumes August 31.

Thanks for your patience — this helps us serve our members better.

Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 20,781–20,790 of 21,502 results (Duration : 0.04 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Event Type

Collections

Conference papers
Development of Kraft Recovery Boilers • What have been the Main Development Steps?, 19PEERS

Development of Kraft Recovery Boilers • What have been the Main Development Steps?, 19PEERS

Journal articles
Magazine articles
Open Access
Critical parameters for tall oil separation I: The importance of ration of fatty acids to rosin acids, TAPPI Journal September 2019

ABSTRACT: Tall oil is a valuable byproduct in chemical pulping of wood, and its fractions have a large spectrum of applications as chemical precursors, detergents, and fuel. High recovery of tall oil is important for the economic and environmental profile of chemical pulp mills. The purpose of this study was to investigate critical parameters of tall oil separation from black liquor. To investigate this in a controlled way, we developed a model test system using a “synthetic” black liquor (active cooking chemicals OH- and HS- ions), a complete process for soap skimming, and determination of recovered tall oil based on solvent extraction and colorimetric analysis, with good reproducibility. We used the developed system to study the effect of the ratio of fatty acids to rosin acids on tall oil separation. When high amounts of rosin acids were present, tall oil recovery was low, while high content of fatty acids above 60% significantly promoted tall oil separation. Therefore, manipulating the content of fatty acids in black liquor before the soap skimming step can significantly affect the tall oil solubility, and hence its separation. The findings open up chemical ways to improve the tall oil yield.

Journal articles
Magazine articles
Open Access
A new technique for the measurement of show-through mottle of fine paper, TAPPI Journal September 2019

ABSTRACT: Mottling within print-through and show-through is caused by the variability of the local optical properties of the sheet. This mottling is visually disturbing and a mark of poor paper quality. The ability to predict print-through mottle of printed paper by measuring show-through mottle on the unprinted sheet would be a valuable asset for paper machine control.We examined the relationship between print-through mottle and show-through mottle. We worked with nine samples of 60 lb. uncoated fine paper (90 g/m2), from various North American paper companies, that were printed on an offset press, 400K (400% Black), on both sides. A show-through mottle instrumental determination technique was developed using an existing Fast Fourier Transform-based algorithm. The nine samples examined were ranked similarly by the visual evaluation of print-through mottle and by the instrumental determination of show-through mottle. We thus established that show-through on the unprinted sheet can be used as a reliable predictor of print-through, therefore saving time and money for papermakers. We also found a significant two-sidedness in show-through for some of the samples.

Conference papers
Surface Mapping Of Fibers As A Screening Mechanism For Fiber Modifying Enzymes, 19TissueCon

Surface Mapping Of Fibers As A Screening Mechanism For Fiber Modifying Enzymes, 19TissueCon

Journal articles
Magazine articles
Open Access
Editorial: Snapshot from the pandemic: TAPPI Journal Editorial Board shares their experiences, TAPPI Journal April 2020

ABSTRACT: In this most serious time of the global COVID-19 pandemic, I and TAPPI staff have been fortunate to work remotely and practice social distancing. The same goes for our Editorial Board. Still, the business of papermaking has continued, and those on our Board who support the industry through their work and research have had to make adjustments. Here, members of the Editorial Board share their experiences of working during the pandemic. As we all anticipate returning to a new normal that once again allows face-to-face interaction, we hope our TAPPI Journal readers stay safe and healthy as we all personally and professionally navigate this challenging time.

Journal articles
Open Access
Commissioning Brownstock Washing Controls for an Evaporator

Commissioning Brownstock Washing Controls for an Evaporator Limited Mill, TAPPI JOURNAL July 2016

Journal articles
Climate Change and its Possible Effects on the US Paper Indu

Climate Change and its Possible Effects on the US Paper Industry, Paper360º July/August 2016

Journal articles
Magazine articles
Open Access
Effect of eucalyptus bark contamination during pulping of mi

Effect of eucalyptus bark contamination during pulping of mixed southern hardwoods, November 2016 TAPPI JOURNAL

Journal articles
Open Access
Passivation of pressure sensitive adhesive stickies by addit

Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking, October 2016 TAPPI JOURNAL

Journal articles
Open Access
Anionically surface treated inkjet and flexographic inks and

Anionically surface treated inkjet and flexographic inks and their deinkability, October 2016 TAPPI JOURNAL

Inside this Section