Applications of Sodium carboxymethyl cellulose in Surface Sizing

Sodium carboxymethyl cellulose (CMC) is a commonly used additive in surface sizing applications in the paper industry. Surface sizing refers to the application of a thin coating to the surface of paper to improve its properties, such as water resistance, printability, and dimensional stability. CMC is an effective surface sizing agent due to its unique properties, which include:

1. Good film-forming ability: CMC can form a strong and flexible film on the surface of paper, which can improve its water resistance and dimensional stability.
2. High viscosity: CMC can increase the viscosity of surface sizing formulations, which can improve the uniformity of the coating and reduce the risk of coating defects.
3. Good adhesion: CMC can adhere well to the surface of paper, which can improve the adhesion of coatings and inks.
4. Compatibility: CMC is compatible with a wide range of other surface sizing agents and can be easily incorporated into existing formulations.

The application of CMC in surface sizing can result in several benefits for the paper industry, including improved printability, reduced ink consumption, increased productivity, and improved quality of the final product. CMC can be used in a variety of surface sizing applications, including magazine papers, coated papers, and packaging materials.