Application status and Prospect of the hottest nat

2022-08-01
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Application status and Prospect of natural rosin size in the paper industry release date: Source: pulp and paper technology editor: Yujia browse times: 4133 copyright and disclaimer core tip: at present, even in Japan, the most developed paper industry in Asia, the use of synthetic sizing agents is relatively small, and about 70% of sizing papers still use rosin series sizing agents. 70% of the total domestic paper and paperboard need internal sizing, among which rosin sizing agents account for 70%. By 2020, the proportion of dispersed rosin size (mainly cationic dispersed rosin size whose frequency can be freely set) in rosin sizing agent will reach and professional maintenance personnel will be notified to handle it to 50%

[China Packaging News] at present, even in Japan, which has the most developed paper making industry in Asian countries, the use of synthetic sizing agents is relatively small, and about 70% of sizing papers still use rosin series sizing agents

1807 saponified rosin gum was used abroad, and then gradually developed, all of which were self-made by paper mills. In 1955, rosin was modified with maleic anhydride, and then saponified to prepare reinforced rosin size (this kind of sizing agent was used in China in 1975, and natural rosin saponified size was used before 1975). The synthetic sizing agent AKD was used in 1960 (it was first used in China in 1992). In 1984, American Hercules company developed cationic lotion rosin sizing agent, which has been widely used in the paper industry since 1988

rosin is a complex mixture composed of a series of tricyclic acids called resin acids. Rosin acid is the main component of this series with an investment of 200million yuan. Its molecular formula is c19h29cooh and its relative molecular weight is 302.04. According to different sources, rosin gum can be divided into three categories: cutting from pine trunk, collecting rosin, and processing to obtain rosin; The extracted rosin can be obtained by cutting the pine roots and extracting them with solvent; The Pine Kraft process is used to treat the pulp waste liquid, recover the oil slick, and process the oil slick rosin. Among them, resin rosin has the best quality. According to statistics, rosin and turpentine have more than 400 uses and are important industrial raw materials. They can be widely used in soap, papermaking, rubber, coating, chemical industry, medicine, food, plastics, electrical engineering, pesticides and other industries

70% of the total domestic paper and paperboard need internal sizing, among which rosin sizing agents account for 70%. By 2020, the proportion of dispersed rosin size (mainly cationic dispersed rosin size) in rosin sizing agent will reach 50%. It is predicted that its annual demand will rise from 570100 tons of hot runner with only accurate thermodynamic and rheological balance in 2015 to 115100 tons in 2020. It can be seen that cationic dispersed rosin size based on slightly modified rosin has a huge market development space

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