Sodium CMC factory
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Product Introduction
Product Details
The properties of CMC are related not only to the degree of substitution but also to the uniformity of the distribution of carboxymethyl groups throughout the cellulose molecule and the uniformity of hydroxymethyl substitution with C2, C3, and C6 groups in each unit of each molecule.
Since Sodium CMC is a highly polymeric linear compound, and its carboxymethyl groups exhibit non-uniform substitution within the molecule,
| Application | Type | Viscosity | Degree of Substitution | Purity | Moisture | |
| Food Grade | FH6 | 1% Soln 100-1000 | 0.7-0.9 | ≥99.5 | ≤8% | |
| FVH6 | 1% Soln 1000-10000 | 0.7-0.9 | ≥99.5 | ≤8% | ||
| FH9 | 1% Soln 300-500 | ≥0.90 | ≥99.5 | ≤8% | ||
| FVH9 | 1% Soln 1000-6000 | ≥0.90 | ≥99.5 | ≤8% | ||
| FL100 | 2% Soln 30-150 | ≥1.0 | ≥99.5 | ≤8% | ||
| Medical Grade | PM7 | 2% Soln 950-5400 | 0.65-0.98 | ≥99.5 | ≤8% | |
| PH7 | 2% Soln 6800-16200 | 0.65-0.98 | ≥99.5 | ≤8% | ||
| Toothpaste Grade | TH9 | 2% Soln 900-1200 | 0.92-1.0 | ≥99.5 | ≤7% | |
| TH10 | 2% Soln 900-1200 | 0.95-1.0 | ≥99.5 | ≤7% | ||
| TH12 | 2% Soln 900-1200 | ≥1.1 | ≥99.5 | ≤7% | ||
| 9H | 1% Soln 1200-4000 | 0.8-1.1 | ≥99.5 | ≤7% | ||
| Printing & Dyeing Grade | 10H | 1% Soln ≥3000 | ≥1.0 | ≥95.0 | ≤10% | |
| 13H | 1% Soln ≥2000 | ≥1.0 | ≥95.0 | ≤10% | ||
| 15H | 1% Soln ≥1800 | ≥1.50 | ≥95.0 | ≤10% | ||
| 18H | 1% Soln ≥1000 | ≥1.80 | ≥95.0 | ≤10% | ||
| Battery Grade | BVH | 1% Soln 1000-9000 | 0.89-0.94 | ≥99.5 | 5%-7% | |
| Ceramic Grade | C1300/1500/1800 | 1% Soln 1200-2000 | ≥0.90 | ≥98.0 | ≤10% | |
| C25 | 1% Soln 20-30 | ≥1.00 | ≥98.0 | ≤10% | ||
| CH10 | 1% Soln 100-1200 | ≥1.00 | ≥98.0 | ≤10% | ||
| TCH9 | 1% Soln 200-500 | ≥1.00 | ≥98.0 | ≤10% | ||
| Oil Drilling Grade | PAC-HV | 1% Soln ≥2500 | ≥0.95 | ≥98.0 | ≤10% | |
| PAC-LV | 2% Soln 100-150 | ≥1.0 | ≥98.0 | ≤10% | ||
| CMC-HV | 1% Soln 1500-1800 | ≥0.90 | ≥65.0 | ≤10% | ||
| CMC-LV | 2% Soln 90-150 | ≥0.90 | ≥65.0 | ≤10% | ||
| Papermaking Grade | FR | 2% Soln 10-70 | ≥0.90 | ≥99.0 | ≤10% | |
the molecules exhibit different orientations when the solution is at rest. When shear forces are present in the solution, the long axis of its linear molecules tends to align with the flow direction, and this tendency strengthens with increasing shear rate until they eventually achieve complete directional alignment. This characteristic of CMC Sodium is called pseudoplasticity.
The pseudoplasticity of carboxymethylcellulose is beneficial for homogenization and ducted transport, preventing an overly greasy texture in liquid milk and facilitating the release of milk aroma.
When using Carboxymethyl cellulose sodium (CMC) products, it's crucial to have a thorough understanding of key parameters such as stability, viscosity, and acid resistance. This knowledge will help us choose the appropriate product.
*Low-viscosity Na CMC products offer a refreshing taste and low viscosity, with almost no thickening effect. They are primarily used in specialty sauces and beverages, and are also a good choice for health supplements.
*Medium-viscosity CMC products are mainly used in solid beverages, general protein drinks, and juices. Specific selection depends on the engineer's individual preferences. CMC contributes significantly to the stability of dairy beverages.
*High-viscosity CMC products have a wider range of applications. Compared to starch, guar gum, and xanthan gum, CMC exhibits significantly better stability, especially in meat products where its water-retention advantage is more pronounced. CMC is also a good choice as a stabilizer in products like ice cream.
The main indicators for evaluating the quality of CMC (Carboxymethylcellulose) are the degree of substitution (DS) and purity. Generally, different DS values result in different properties of CMC; a higher degree of substitution enhances solubility, and improves the transparency and stability of the solution. It has been reported that CMC with a DS of 0.7–1.2 exhibits better transparency, and its aqueous solution viscosity is highest at pH values of 6–9.
To ensure its quality, in addition to selecting the etherifying agent, several factors affecting the degree of substitution and purity must be considered, such as the ratio of alkali to etherifying agent, etherification time, water content of the system, temperature, pH value, solution concentration, and salt content.
The quality of the finished Carboxymethylcellulose product is primarily determined by the solution. If the solution is clear, with few gel particles, few free fibers, and few black impurities, the CMC quality is generally good. If the solution remains clear even after several days without turning white or cloudy, it indicates a high-quality product.
The time required for complete dissolution of CMC is determined based on the following aspects:
(1) CMC and water are completely bonded together, and there is no solid-liquid separation between them;
(2) The mixed paste is uniform and has a smooth surface;
(3) The mixed paste is nearly colorless and transparent, and contains no particulate matter. From the time CMC is added to the mixing tank and mixed with water until it is completely dissolved, the time required is between 10 and 20 hours. To expedite production and save time, homogenizers or colloid mills are currently commonly used for rapid product dispersion.
CMC market trends and future development
With the increasing awareness of environmental protection and the emphasis on green polymer materials, the market prospects of CMC continue to improve. Currently, the research and development focus is moving from general-purpose Carboxymethyl cellulose powder to functional, high-purity, low-ash, multi-purpose compound CMC. Whether it is improving product quality or optimizing production processes, the rational selection of high-quality CMC products can bring significant benefits. Mastering product characteristics and clarifying application requirements will be the key to purchasing and using CMC.
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