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Editor's Note: An Ideal Raw Material for Pulp and Paper, TAP

Editor's Note: An Ideal Raw Material for Pulp and Paper, TAPPI JOURNAL March 2010

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Conversions: Tsunami or Trickle?, Paper360º November/Decembe

Conversions: Tsunami or Trickle?, Paper360º November/December 2017

Journal articles
Magazine articles
Papermaking Best Practices With Vacuum-Dewatering Systems: P

Papermaking Best Practices With Vacuum-Dewatering Systems: Part 2, Paper360º November/December 2017

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The PPI Top 100, Paper360º September/October 2017

The PPI Top 100, Paper360º September/October 2017

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Partnering with Paper for Sustainable Biomaterials, Paper360

Partnering with Paper for Sustainable Biomaterials, Paper360º September/October 2017

Journal articles
Magazine articles
Papermaking Best Practices With Vacuum-Dewatering Systems: P

Papermaking Best Practices With Vacuum-Dewatering Systems: Part 1, Paper360º September/October 2017

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TAPPI JOURNAL Summaries, Paper360º September/October 2017

TAPPI JOURNAL Summaries, Paper360º September/October 2017

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Open Access
Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

Journal articles
Magazine articles
Characterizing rheological behavior and fluidization of highly refined furnishes, TAPPI Journal April 2024

ABSTRACT: In this work, highly refined softwood bleached kraft pulp (SWBKP) furnishes, referred to here as XFC, were studied from the perspective of fiber suspension handling in processing. The rheology of the furnishes was studied with a rotational rheometer using a non-standard flow geometry to understand the viscosity development at different consistencies and the impact of temperature. For fluidization analysis during pipe flow, two optical methods were implemented; namely, optical coherence tomography (OCT) and high-speed video (HSV) imaging. The OCT was used to determine the small-scale floc structures near the pipe wall where the shear stress is highest, and the HSV imaging was applied for observing flow instabilities and XFC suspension uniformity at the pipe scale. All these issues can be significant in deciding the minimum flow rate required for a process pipe to get sufficient fluidization of XFC suspensions.

Journal articles
Magazine articles
Open Access
Effect of pressure and time on water absorption of coated paperboard based on a modified Cobb test method, TAPPI Journal April 2024

ABSTRACT: This manuscript presents the study of water absorption by paperboard subjected to water at high hydrostatic pressure based on a modified Cobb tester. The new tester is based on TAPPI Standard Test Method T 441; however, the water column can reach up to 550 mm. The evaluation consisted of measurements of water absorption for coated and uncoated paperboard at different exposure times from 5 s to 45 s and water column heights from 10 mm to 500 mm (corresponding to hydrostatic pressures 98 Pa and 4.9 kPa, respectively). The coatings were formulated as a combination of styrene acrylate (SA; two binder levels) and two types of ground calcium carbonates (differing particle sizes) to form the two pre-coating structures: open and closed. The coating weight was 6 g/m2 applied on 210 g/m2 solid bleached board (SBB). In addition, 210 g/m2 uncoated boards were studied. Characterization of the coatings was performed with scanning electron microscopy (SEM), mercury intrusion, and roughness. It was found that the new device properly mimics the conditions of the current Cobb tester. The characterization of the coating also confirmed the presence of more open/larger pores of open coatings, confirming the desired coating structure. The absorption of boards was mainly driven by exposure pressure by comparing with exposure time. This was already evident after shorter periods of exposure time at 5 s and also 15 s exposure time. Paperboards with open coatings showed slightly higher absorption than other boards.

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