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 11–20 of 123 results (Duration : 0.007 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Collections

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
A true green cover for industrial waste landfills, TAPPI Journal April 2024

ABSTRACT: Greenhouse gas (GHG) emissions in the United States totaled 5,981 million metric tons of carbon dioxide equivalent (MMT CO2eq) in 2020. Of that, GHG emissions by the pulp and paper sector amounted to 35 MMT CO2eq direct emissions and those by industrial waste landfills summed to 7.4 MMT CO2eq direct emissions. Loss of GHG sinks due to change in land use further contributes to the net GHG emissions. Industrial waste landfills are typically required to comply with certain federal and state regulations, including meeting requirements for final cover systems. Conventional final cover systems have included use of soil covers and/or soil-geosynthetic composite covers. An engineered turf cover provides for an excellent “green” alternative final cover system for industrial waste landfills.This paper discusses various sustainability aspects pertaining to use of an engineered turf final cover, including: (i)significantly low carbon footprint associated with the construction of an engineered turf alternative final coverwhen compared to closure using a traditional or prescriptive cover system; (ii) saving valuable soil and land resourc-es; (iii) saving water resources by reduction in its use during and after construction; (iv) reducing impacts associated with borrow areas; and (v) reducing overall carbon footprint. Further, when using an engineered turf cover, opportunities exist for beneficial reuse of land, including development of solar energy. A brief discussion on the potential fordevelopment of solar energy is included.

Journal articles
Magazine articles
Open Access
The role of hornification in the deterioration mechanism of physical properties of unrefined eucalyptus fibers during paper recycling, TAPPI Journal February 2024

ABSTRACT: Physical properties of cellulosic paper deteriorate significantly during paper recycling, which hinders the sustainable development of the paper industry. This work investigates the property deterioration mechanism and the role of hornification in the recycling process of unrefined eucalyptus fibers. The results showed that during the recycling process, the hornification gradually deepened, the fiber width gradually decreased, and the physical properties of the paper also gradually decreased. After five cycles of reuse, the relative bonding area decreased by 17.6%, while the relative bonding force decreased by 1.8%. Further results indicated that the physical property deterioration of the paper was closely related to the decrease of fiber bonding area. The fiber bonding area decreased linearly with the reduction of re-swollen fiber width during paper recycling. Re-swollen fiber width was closely related to the hornification. Hornification mainly reduces the bonding area of unrefined eucalyptus fiber rather than the bonding force. The work elucidates the role of hornification in the recycling process of unrefined eucalyptus fibers and the deterioration mechanism of paper physical properties, which will be helpful to control the property deterioration of paper and achieve a longer life cycle.

Magazine articles
Open Access
The enemy within, TAPPI JOURNAL, April 1997, Vol. 80(4)

The enemy within, TAPPI JOURNAL, April 1997, Vol. 80(4)

Magazine articles
Open Access
Anhydrous ammonia storage vessels in the pulp and paper industry, TAPPI JOURNAL, April 1997, Vol. 80(4)

Anhydrous ammonia storage vessels in the pulp and paper industry, TAPPI JOURNAL, April 1997, Vol. 80(4)

Magazine articles
Open Access
Shop talk: reducing voc emissions with thermal oxidation units, TAPPI JOURNAL, December 1997, Vol. 80(12)

Shop talk: reducing voc emissions with thermal oxidation units, TAPPI JOURNAL, December 1997, Vol. 80(12)

Magazine articles
Open Access
Operations teams run a woodyard, TAPPI JOURNAL, December 1996, Vol. 79(12)

Operations teams run a woodyard, TAPPI JOURNAL, December 1996, Vol. 79(12)

Magazine articles
Open Access
Local section development efforts earn distinction for paul magnabosco, TAPPI JOURNAL, March 1996, Vol. 79(3)

Local section development efforts earn distinction for paul magnabosco, TAPPI JOURNAL, March 1996, Vol. 79(3)

Magazine articles
Open Access
1995 pulping conference succees with opportunities to participate, TAPPI JOURNAL, May 1996, Vol. 79(5)

1995 pulping conference succees with opportunities to participate, TAPPI JOURNAL, May 1996, Vol. 79(5)

Magazine articles
Open Access
China: now and in the future, TAPPI JOURNAL, May 1996, Vol. 79(5)

China: now and in the future, TAPPI JOURNAL, May 1996, Vol. 79(5)

Inside this Section