Sodium carboxymethyl cellulose (CMC) has many uses in the papermaking industry and can play a role in multiple processes, as follows:
Adding to pulp:
1. Improve pulping efficiency and promote fiber refinement, thereby shortening pulping time;
2. Regulate the potential in the pulp, evenly disperse the fibers, improve the "papermaking performance" of the paper machine, and further optimize paper sheet formation;
3. Improve the retention rate of various additives, fillers and fine fibers;
4. Increase the bonding force between fibers and improve the physical properties of paper;
5. Used in combination with dry and wet strength agents, it can improve the dry and wet strength of paper;
6. Protect rosin, AKD and other sizing agents in the pulp to enhance the sizing effect.
Surface sizing:
1. Good rheological and film-forming properties;
2. Reduce the pores on the paper surface and improve the oil resistance of the paper;
3. Increase the brightness and glossiness of the paper;
4. Improve the stiffness and smoothness of the paper and control curling;
5. Improve the surface strength and wear resistance of the paper, reduce hair loss and powder loss, and improve printing quality.
In summary, sodium carboxymethyl cellulose plays an important role in the pulp addition and surface sizing processes of papermaking, and can significantly improve the quality and performance of paper.
