Sodium Carboxymethyl Cellulose occupies a large proportion in the paper industry. It has outstanding use characteristics and strong adaptability, so it can be widely used in the paper industry, and it will also have impact on the quality of the paper.
First of all, sodium carboxymethyl cellulose is a very good dispersing agent. After it is dissolved and added to the pulp suspension, it can make the pulp fibers and the particles of the filler affinity, so that the negative charge of the negatively charged pulp fibers and filler particles can be increased. The fibers and fillers in the pulp suspension can be dispersed more uniformly according to the repulsion of same charged particles. Sodium Carboxymethyl Cellulose can mainly improve the uniformity of the paper sheet which is also one of the ways to improve the strength of the paper.
When sodium carboxymethyl cellulose enters the wet end paper, the carboxymethyl group reacts with the hydroxyl groups on the fibers, which can increase the bonding force between fibers. After a series of processing, the adhesion between fibers can be improved. It will directly increase the physical strength of the paper.
Sodium carboxymethyl cellulose has the function of sizing in the pulp. On the one hand, it gives the paper a certain degree of sizing, and it is also the protective colloid for rosin and other sizing agents, which can promote them to disperse into the particles and evenly distributed on the fibers, delaying the hydrolysis rate of the protective colloid and reducing the possibility of contamination by hydrolyzed garbage.
Because sodium carboxymethyl cellulose is easy to have affinity with fine fibers and filler particles, if appropriate cationic additives are used together, a good synergistic effect will be obtained, which directly makes the effect of the additives more significant.
In a word, sodium carboxymethyl cellulose is used as a dispersant with outstanding characteristics in the paper making industry, thereby improving the uniformity of the paper, improving the strength of the paper, reducing the possibility of hydrolyzed garbage pollution, and increasing its using effect.