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Development of reinforced paper and mitigation of the challenges of raw material availability by utilizing Areca nut leaf, TAPPI Journal September 2022
ABSTRACT: Paper industries are facing a raw material crisis and searching for alternate raw materials that may be able to help mitigate the issue. Many industries use agro-waste as a raw material, irrespective of it having low bleachability and poor mechanical strength. Areca nut leaf (ANL) is a nonwood-based material that may be acceptable as an alternate source of raw material that contains 61.5% holocellulose and 13.6% lignin, which is comparable to other agro-wastes and hardwood pulps. Kraft anthraquinone pulping with 20% active alkali as sodium oxide (Na2O), 25% sulfidity, and 0.05% anthraquinone produced 15 kappa pulps with about 38.5% pulping yield. The bleachability of ANL pulp was good, and 83.5% ISO brightness could be achieved using the D0(EOP)D1 bleaching sequence. The ANL fiber has 33.8% better tensile, 54.5% better tear, and 15.2% better burst index than hardwood fiber. Similarly, 60.4% better tensile, 56.5% better tear, and 21.7% better burst index were observed in ANL than in wheat straw. Thus, the study revealed that Areca nut leaf can be used as an alternative raw material for papermaking, as well as to improve the physical property of paper products by blending it with inferior quality pulp.
Journal articles
Magazine articles
Fiber-based characterization of pulp refining, TAPPI Journal September 2022
ABSTRACT: Fiber development in pulp refining can be characterized by three parameters: number of impacts on pulp, N; energy per impact, I, and bar force on fibers, F. These parameters enable comparisons of radically different refining conditions; determination of intensity for hardwoods and softwoods; assessment of effect of bar width on fiber shortening; and predictions of tensile strength increases.
Journal articles
Magazine articles
Advantages of lean duplex stainless steels in the pulp and paper industry, TAPPI Journal April 2023
ABSTRACT: The performance of lean duplex stainless steels has been utilized by the pulp and paper industry since their introduction to the market almost 20 years ago. Experience has shown that this group of stainless steels has exceptional performance in, for example, alkaline environments towards typical deterioration mechanisms, i.e., uniform corrosion and stress corrosion cracking. The chemistry of the “lean” duplex steels is designed so that the content of volatile and expensive elements like nickel and molybdenum can be reduced to an absolute minimum without sacrificing the technical performance. This reduces the raw material cost and most importantly provides predictability of the steel price, which is often challenging with conventional austenitic and duplex stainless steels.Thanks to a dual phase microstructure and high nitrogen content, lean duplex steels have at least two times higher strength compared to standard austenitic stainless steels. This is often a preferred feature in pulp and paper construction, as it enables lighter structures and less material to be utilized. Today, lean duplex steels are widely available in various dimensions, from thin cold rolled sheets up to thick hot rolled plates. Lean duplex steels are also fully recyclable after the decommissioning stage of the equipment, thereby contributing to the circular economy.
Journal articles
Strength development through refining and wet pressing, TAPP
Strength development through refining and wet pressing, TAPPI JOURNAL, November 1992, Vol. 75(11)
Journal articles
Should there be some centralized research in the u.s. paper
Should there be some centralized research in the u.s. paper industry?, TAPPI JOURNAL, October 1992, Vol. 75(10)
Journal articles
The effect of cyclic environments on the compression strengt
The effect of cyclic environments on the compression strength of boxes made from high-performance (fiber-efficient) corrugated fiberboard, TAPPI JOURNAL, October 1992, Vol. 75(10)
Journal articles
Corrugator steam systems, TAPPI JOURNAL, October 1992, Vol.
Corrugator steam systems, TAPPI JOURNAL, October 1992, Vol. 75(10)
Journal articles
Chlorination stage elimination by using nitrosation pretreat
Chlorination stage elimination by using nitrosation pretreatment before oxygen delignification/oxygen reinforced extraction, TAPPI JOURNAL, October 1992, Vol. 75(10)
Journal articles
Observations from testing dryer section performance, TAPPI J
Observations from testing dryer section performance, TAPPI JOURNAL, October 1992, Vol. 75(10)
Journal articles
Industrial photogrammetry; a cost-effective solution for an
Industrial photogrammetry; a cost-effective solution for an as-built world, TAPPI JOURNAL, September 1992, Vol. 75(9)