Chemical Properties
- CAS Number: 9004-32-4
- Appearance: White to slightly off-white powder, fibrous or granular
- Odor: Odorless
- Taste: Tasteless
- pH: 6.5 – 8.5 (1% solution)
- Solubility: Easily soluble in both cold and hot water
- Viscosity: Highly variable depending on grade and concentration
- Degree of Substitution (DS): 0.6 – 0.9 (This refers to the average number of carboxymethyl groups attached to each glucose unit in the cellulose chain. Higher DS generally leads to increased water solubility and viscosity.)
Main Specification
| PARAMETER | SPECIFICATION | SPECIFICATION | SPECIFICATION |
| Product Grade | HV-1 | HV-2 | HV-3 |
| Purity | 72 | 72 | 90 |
| Viscosity(2% solution) | 300-600 mpa.s | 800-1200mpa.s | 800-1200mpa.s |
| Moisture | 10%max | 10%max | 10%max |
| Degree of substitution（D.S） | 0.65%min | 0.65%min | 0.8%min |
| PH | 6-9 | 6-9 | 6-9 |
| chloride(Nacl) | 15%max | 7%max | 1.8%max |
| Loss on drying | 10%max | 10%max | 8%max |
Key Features
- Anionic Polyelectrolyte: Gives it unique interactions with other substances.
- Thickening and Stabilizing Agent: Increases viscosity and prevents settling or separation in mixtures.
- Film-Forming: Creates strong, flexible films.
- Water Retention: Helps materials retain moisture.
- Dirt Suspension: Prevents removed dirt from re-depositing during washing.
Typical Applications in Textiles
- Warp Sizing: Protects yarn from abrasion during weaving.
- Printing: Thickener for printing pastes, providing sharp patterns.
- Finishing: Improves fabric handle and drape.
- Detergents: Suspending agent for dirt removal.
General Properties of Textile Grade CMC
- High Viscosity: Provides desired thickening in textile processes.
- Good Film Formation: Creates protective and stabilizing layers.
- Excellent Water Retention: Ensures proper moisture levels during processing.
- Compatibility: Works well with various dyes and textile auxiliaries.
Uses
In textile industry, Sodium Carboxymethyl Cellulose can work sizing agent for the warp sizing of fabrics.
It can improve the best product & increase strength in the process of spinning. CMC can be used as printing material for dye-trimming industry and it can improve hydrophilic force and osmosis force of dye material,making dying more even and reducing chromatism.
The print paste of rayon fiber usually contains cleaning solvent with high boiling point, dye, water and enough thickening agents. Sodium Carboxymethyl Cellulose CMC is the thickening agent as well as the emulsifying agent, so it helps to uniformly mix the dye with high boiling point cleaning solvent with as well as to stabilize the dye suspension and thus to prevent the occurrence of sedimentation and the formation of foam in storage.
As suspending agent of printing paste, Sodium Carboxymethyl Cellulose mainly used in printing and dyeing.It has good viscosity stability,Good distribution uniformity of DS (degree of substitution),Good fluidity of solution in the color paste system, Higher washable performance in the washing process after printing and dyeing ,significantly improve the printing paste paste type,used for reactive dye printing for cotton fabrics as textile printing thickener, with a good colour yield, handle, penetration.