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Journal articles
Open Access
Life-cycle thinking in the pulp and paper industry, part 2: LCA studies and opportunities for development, TAPPI JOURNAL, August 2007

Life-cycle thinking in the pulp and paper industry, part 2: LCA studies and opportunities for development, TAPPI JOURNAL, August 2007

Journal articles
Magazine articles
Open Access
Kraft pulp viscosity as a predictor of paper strength: Its uses and abuses, TAPPI Journal October 2023

ABSTRACT: For bleached kraft pulps, two factors govern paper strength: the individual fiber strength, and the bond strength that adheres the individual fibers together in the paper matrix. Inherent fiber strength is related to the length of the carbohydrate polymers, also known as the degree of polymerization (DP). Average DP (DP) is inferred by performing pulp viscosity measurements. Under certain circumstances during kraft pulping and bleaching, the average polymer lengths can be shortened, resulting in lower pulp viscosity, and may indicate fiber damage. Fiber damage typically manifests itself as a reduction in tear strength for well-bonded handsheets.This paper will review the literature on how pulp viscosity can predict paper/fiber strength and how it can be used as a diagnostic tool. It can be a means to monitor pulp quality during pulping and bleaching, as well as to alert when such operations approach a critical threshold. However, viscosity losses must be carefully and judiciously analyzed. Like most diagnostic tools, viscosity measurements can be misused and abused, which can lead to incorrect inferences about intrinsic fiber strength. This review will also cover these misuses. The overall goal is to provide the papermaker a better understanding of what pulp viscosity is, how it correlates to potential sheet strength, and what its limitations are. It will be illustrated that when pulp viscosity drops below a critical value, it will indicate an appreciable deterioration in the paper’s tear and tensile strength.

Journal articles
Magazine articles
Open Access
Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites, TAPPI Journal January 2020

ABSTRACT: Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and polypropylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, polyethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.

Journal articles
Open Access
Key aspects of capital effectiveness, TAPPI JOURNAL, October 1997, Vol. 80(10)

Key aspects of capital effectiveness, TAPPI JOURNAL, October 1997, Vol. 80(10)

Journal articles
Open Access
Pulp and paper companies save energy and resources through climate wise, TAPPI JOURNAL, October 1997, Vol. 80(10)

Pulp and paper companies save energy and resources through climate wise, TAPPI JOURNAL, October 1997, Vol. 80(10)

Journal articles
Open Access
Peroxyformic acid pulping of nonwood plants by the milox method - part 1: pulping and bleaching, TAPPI JOURNAL, September 1997, Vol. 80(9)

Peroxyformic acid pulping of nonwood plants by the milox method - part 1: pulping and bleaching, TAPPI JOURNAL, September 1997, Vol. 80(9)

Journal articles
Open Access
On management: interlaboratory testing: a quality assurance tool for the real world, TAPPI JOURNAL, September 1997, Vol. 80(9)

On management: interlaboratory testing: a quality assurance tool for the real world, TAPPI JOURNAL, September 1997, Vol. 80(9)

Journal articles
Open Access
Trends in U.S. Pulp and Paper Mill SO2 and NOx Emissions, 1980-1995, TAPPI JOURNAL, April 1998, Vol. 81(4)

Trends in U.S. Pulp and Paper Mill SO2 and NOx Emissions, 1980–1995, TAPPI JOURNAL, April 1998, Vol. 81(4)

Journal articles
Open Access
Industrial Wood Ash as a Soil Amendment for Crop Production, TAPPI JOURNAL, April 1998, Vol. 81(4)

Industrial Wood Ash as a Soil Amendment for Crop Production, TAPPI JOURNAL, April 1998, Vol. 81(4)

Journal articles
Open Access
Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)

Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)

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