Minimizing the Chlorine Content in Bleached Sulfate Pulp for Sanitary Tissue products and Food Packaging
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2021, Vol 9, Issue 3
Abstract
The increasing consumption of pulp for chemical processing, including production of sanitary tissue products and other medical products, food packaging, as well as fillers for food products leads to new requirements for the quality of raw materials. The task of improving the characteristics of pulp has become particularly acute in connection with the COVID-19 epidemic: the demand for disposable nonwoven materials in direct contact with the human skin has increased several times over. The elemental chlorine free (ECF) sulfate pulp bleaching process, which uses chlorine dioxide as a bleaching agent, dominates bleached pulp production worldwide. The chlorine-containing compounds formed as a result of bleaching pollute not only waste water, but also the product itself. In the near future, it is expected that paper products made with chlorine-based bleaches may be banned for the production of sanitary tissue products and food packaging. If the products of the pulp and paper industry do not meet international consumer requirements, the pulp market for these purposes may face undesirable results. The most promising direction of modernization the existing bleaching schemes, both in terms of the process consumption parameters and the quality of the produced pulp, is the use of oxygen-alkaline bleaching in the first stage. Determination of total and organically bound chlorine content in pulp materials in accordance with ISO 11480:2017 on the advanced plant has shown, that the introduction of bleaching schemes using oxygen-alkaline agents will ensure the recommended content of chlorine compounds while maintaining the necessary characteristics of pulp for the manufacture of medical and sanitary tissue products, food packaging. However, high quality of finished products that meet consumers’ requirements is possible only if the chlorine content is controlled at all stages of pulp production, since the quantitative indicators of this substance content remain close to the upper allowable limit.
Authors and Affiliations
e. D. sofronova, v. A. Lipin, v. K. Dubovy, t. A. Sustavova
Keywords
Related Articles
- EP ID EP694802
- DOI https://doi.org/10.37482/0536-1036-2021-3-186-195
- Views 133
- Downloads 0
Calculating the Groundwork Volume for the Construction of Logging Roads
Organizational and engineering models provide a formalized description of the construction process, including a list of operations, their sequence, description of the relationship between the operations, and the features...
Characteristics of Wood Substance Formation during Growing of Scots Pine Seedlings Using Chemical Markers
Currently, seedlings of the main silvicultural species are grown in greenhouses by the technology of ball-rooted planting material production. The process features raise the issue of the resulting planting material susta...
Seed Regeneration of Buxus colchica Pojark. under the Conditions of Epiphytotics of Boxwood Forests
In response to expansion of Cydalima perspectalis Walker, 1859, mass scale drying of Buxus colchica Pojark. resulted in succession of forest communities of the Western Caucasus in 2014–2017. Changes in illumination of th...
Pigment Composition of Sphagnum fuscum of Wetlands under Anthropogenic Impact
Oligotrophic bogs prevail among wetlands in the mainland of the North of Russia. The study of the moss cover response to the increase in anthropogenic load makes it possible to reveal a shift in the ecological balance of...
Application of the Adobe Photoshop Software Package in Leaf Blade Area Measurement of Woody Plants
Mechanical properties are crucial in assessing the paper quality. Deformation and strength properties of paper are determined by the strength and stiffness of the interfiber and intermolecular hydrogen bonds. The contrib...