Sodium CMC added to the wet end of paper making can effectively improve the bond of pulp fibers and improve the uniformity and strength of paper, effectively reduce the loss of fillers and fine fibers, and improve the drainage performance of pulp, improving the quality and toughness of paper.CMC Powder used for surface sizing can prevent the paper from curling or brittle, improve the surface strength and smoothness, and improve papers absorption of ink and high quality. Besides, CMC Polymer can also prevent the migration of water-soluble adhesives, improve rheology, and improve the leveling effect of pigments.