Sodium carboxymethyl cellulose (CMC) is a commonly used additive in the paper industry due to its unique properties, such as high viscosity, water retention, and film-forming ability. CMC can be used in various stages of the papermaking process to improve the quality and performance of paper products. Here are some common applications of CMC in the paper industry:
Coating: CMC can be used as a coating agent in papermaking to improve the surface smoothness and glossiness of paper. It can also enhance the ink absorption and printing quality of the paper. CMC coatings can be applied by spraying, brushing, or roller coating.
Binding: CMC can be used as a binding agent in paper products to improve their strength and durability. It can help to bind the fibers together and prevent them from falling apart during the papermaking process.
Sizing: CMC can be used as a sizing agent in papermaking to improve the paper’s water resistance and reduce its porosity. CMC sizing can be applied before or after the paper is formed, and it can be used in conjunction with other sizing agents.
Retention aid: CMC can be used as a retention aid in papermaking to improve the retention of fillers, fibers, and other additives. It can help to reduce the amount of waste and improve the efficiency of the papermaking process.
Dispersant: CMC can be used as a dispersant in the papermaking process to disperse and suspend solid particles in water. It can help to prevent agglomeration and improve the distribution of additives in the paper pulp.
Overall, the use of CMC in the paper industry can help to improve the quality and performance of paper products, while also increasing the efficiency and sustainability of the papermaking process.