Dissolving pulp and its properties
Dyunyasheva, Venera (2017)
Tampereen ammattikorkeakoulu
2017
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2017061913779
https://urn.fi/URN:NBN:fi:amk-2017061913779
Tiivistelmä
Dissolving pulp is special grade of pulp with high purity that is widely used in textile production industry to get rayon staple for high-quality fabrics. It is also used in the paper production industry as an additive to binders or as a blend with mechanical pulps. Comparing with other types of pulp, dissolving pulp is rarely intended for papermaking.
The aim of this study was to gather theoretical information on the dissolving pulp and its properties. In order to achieve this goal, there were tasks to be solved: to research the production process of dissolving pulp, to figure out important steps of the process, to study dissolving pulp applications and final products, to analyse the world market situation, to test dissolving pulp samples in TAMK laboratory.
The study was done by researching theoretical data. Scientific portals, articles and tutorials were analyzed. In order to handle the experimental part, the Stora Enso company was involved to supply dissolving pulp sheets.
The knowledge of the process of raw wood transformation into the dissolving pulp was obtained. The quality of pulp is influenced by the quality and composition of wood chips fed for cooking. Since the alkaline sulfate cooking is unable to remove sufficient amount of hemicellulose, pre-hydrolysis treatment is significant. World market analysis shows that the demand will continuously grow upward with relatively fair pricing level.
Obtained experimental results show that Stora Enso samples had high levels of dry matter and swelling value. The findings indicate that dissolving of the given pulp sample has occurred in 10% NaOH solution.
The aim of this study was to gather theoretical information on the dissolving pulp and its properties. In order to achieve this goal, there were tasks to be solved: to research the production process of dissolving pulp, to figure out important steps of the process, to study dissolving pulp applications and final products, to analyse the world market situation, to test dissolving pulp samples in TAMK laboratory.
The study was done by researching theoretical data. Scientific portals, articles and tutorials were analyzed. In order to handle the experimental part, the Stora Enso company was involved to supply dissolving pulp sheets.
The knowledge of the process of raw wood transformation into the dissolving pulp was obtained. The quality of pulp is influenced by the quality and composition of wood chips fed for cooking. Since the alkaline sulfate cooking is unable to remove sufficient amount of hemicellulose, pre-hydrolysis treatment is significant. World market analysis shows that the demand will continuously grow upward with relatively fair pricing level.
Obtained experimental results show that Stora Enso samples had high levels of dry matter and swelling value. The findings indicate that dissolving of the given pulp sample has occurred in 10% NaOH solution.