Sodium Carboxymethyl Cellulose (CMC) for Papermaking
Sodium carboxymethyl cellulose (CMC) is a natural anionic polymer for use in the pulp and paper industry to help increase paper quality characteristics, acting effectively to satisfy specific roles as follows.
Paper Coating Improving
- Used to control and modify the rheology of paper coating and the dispersion of pigment, increasing the solids content of coating;
- Provide coating with pseudoplastic behavior, speeding up the coating process;
- Improve the water retention of coating, delivering superior control of water-soluble binder migration;
- Excellent film forming ability helps improve coating gloss;
- Promote the performance of the whitening agent in the coating, improving the whiteness of the coated paper;
- Enhance the lubrication effect of coating, improving the coating quality while extending the service life of scraper blade;
- Add grinding efficiency of paper pulp, enabling pulp fibers to be refined while shortening pulping cycle;
- Make pulp fibers uniformly dispersed, improving paper machine runnability and resulting in better paper formation;
- Increase the retention rate of various additives, fillers and fibers;
- Increase bond strength between fibers, providing paper products with better physical strength properties;
- Work together with dry and wet strengthening agents to improve dry and wet strength of paper;
- Used as pulping sizing agent as gum rosin, AKD and other protective colloids, delivering better sizing effect;
- Offer excellent rheology, leading to good film formation;
- Reduce the airborne porosity on paper surface, providing good resistance to oil and grease;
- Increase the gloss of paper;
- Improve paper sheet stability and surface smoothness, while preventing curling;
- Provide additional paper surface strength and abrasion resistance, reducing paper linting and dusting so that to improve printability and enhance the printing results;
| Type | |||||||
| 2% Soln. Viscosity (mPa·s) | 5-10 | 10-20 | 20-30 | 30-100 | 100-300 | 300-800 | 1000-3000 |
| (1#60R) | (2#60R) | (2#30R) | |||||
| Degree of Substitution | 0.65-0.85 | ||||||
| pH Value | 6.0-8.5 | ||||||
| Purity (%) | ≥98 | ||||||
| Loss on Drying (%) | ≤10.0 | ||||||
