Paper grade CMC

In the paper industry, CMC is used in the pulping process to improve residence rate and increase wet strength.

Classification:

Paper grade

Key words:

CMC & CMS

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Product Details

Sodium carboxymethyl cellulose, referred to as CMC, is a kind of anionic polymer with ether bond structure, which is made of cellulose as the main raw material, after alkalization and ultra fine treatment, and then made by multiple chemical reactions such as crosslinking, etherification and acidification. Non-toxic, tasteless, odorless, with good water retention.

Chemical Name:Sodium carboxymethyl cellulose (CMC)

Physical and chemical properties:Easily soluble in water, insoluble in organic solvents, has a good chemical stability.

Appearance:White or light yellow powder or granules.

characteristic and function

The main role in surface sizing

1. Has good rheological and film-forming properties;

2. Reduce the paper surface pores and improve the oil resistance of the paper;

3. Increase the brightness and gloss of the paper;

4. Increase the stiffness of the paper, smoothness, control curl;

5. Improve the surface strength and abrasion resistance of the paper, reduce the lint and powder, and improve the printing quality.

The main role in pigment coating

1. Control and adjust the rheology of the coating and the dispersion of the pigment, and improve the solid content of the coating;

2. Make the coating have pseudoplasticity and improve the coating speed;

3. Enhance the water retention of the coating and prevent the migration of the water-soluble adhesive;

4. Has a good film-forming, improve coating gloss;

5. Improve the retention rate of brighteners in coatings and improve the whiteness of paper;

6. Improve the lubrication performance of the coating, improve the quality of the coating, and extend the service life of the scraper.

The main role in the addition of pulp

1. Improve refining efficiency, promote fiber refinement and shorten beating time;

2. Adjust the internal potential of the pulp, evenly disperse the fibers, improve the "papermaking performance" of the paper machine, and further improve the paper sheet forming;

3. Improve the retention rate of various additives, fillers and fine fibers;

4. Increase the binding force between fibers and improve the physical properties of paper;

5. Combined with dry and wet strength agent, it can improve the dry and wet strength of the paper;

6. Protect the internal sizing agent such as rosin and AKD to enhance the sizing effect.

Technical indicators

Indicator Name	Indicators
Viscosity (2% aqueous solution, 25 ℃)mPa.s	7.0-600.0
pH	6.0-8.5
Substitution degree DS	0.7-1.0
Water%	≤ 10.0

Characteristics and Function of Paper Grade CMS

Sodium carboxymethyl starch (CMS) is a modified starch etherified with carboxymethyl, which is superior to carboxymethyl cellulose (CMC) and is the best product to replace CMC. CMS is widely used in papermaking. In the filler added as a stabilizer, thickening bonding effect, so that the paper gloss bright, improve the printing performance of the paper, enhance the toughness and wear resistance of the paper. Used as an additive in the pulp to improve the retention and filtration aid effect. It is also used for surface sizing of paper, which can significantly improve the dry strength and wet strength, oil resistance, ink absorption and water resistance of paper. Use in coating bonding can improve the production and use properties of paper.

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