CMC functions as an efficient dispersant capable of fully dispersing pigment particles and other colloidal particles within coating formulations. This creates a stable and homogeneous coating system, ensuring excellent processing performance and superior end-product quality.

When used in paper surface sizing, Sodium Carboxymethyl Cellulose offers multiple advantages:

Excellent rheological behavior and film-forming properties

Reduced paper surface porosity and enhanced oil resistance

Improved paper brightness and gloss

Increased stiffness and smoothness while effectively controlling curling

Enhanced surface strength and abrasion resistance

Reduced linting and dusting during printing

Improved printing quality and ink performance

By using CMC alone or in combination with other sizing agents, papermakers can form a continuous, flexible, and uniform film on the paper surface. This film also provides moisture regulation benefits, helping reduce internal stress caused during the drying process. As a result, paper and paperboard products achieve improved dimensional stability, reduced warping deformation, and minimized printing registration errors.

Traditionally, many paper mills use oxidized starch or blends of oxidized starch and PVA for surface sizing. However, oxidized starch tends to penetrate deeply into the paper sheet, resulting in uneven film formation on the surface. PVA-based sizing solutions may also suffer from excessive skin formation, limiting overall sizing performance.

That CMC significantly improves:

Surface picking resistance

Ink absorption performance

Printing adaptability

Surface uniformity

At the same time, CMC does not negatively affect other important paper performance indicators, making it one of the most efficient surface sizing additives available today.

Hengxin Polymer continuously invests in product innovation and application research to help customers optimize paper performance, improve coating efficiency, and reduce production costs.

Its CMC products are widely used in:

Paper surface sizing

Coating formulations

Printing and packaging paper

Specialty paper production

Industrial dispersion systems

For more information about Hengxin Polymer and its CMC solutions, please inquire.