In washing product industry, Sodium CMC is widely used as thickener and stabilizer due to its good chemical properties. After it dissolves in water, it has good thickening, dispersing and emulsifying effects. It can absorb oil particles in oil, disperse the oil suspension in the oil in the water, and will be washed. The surface of the object is formed into a hydrophilic film and prevents direct contact with the object to be washed. It can also make the washing liquid have a certain viscosity so that the solution state remains stable. Therefore, CMC is a very important component in detergent powder and detergent liquid.
As a relatively basic form of washing product, there are still many consumers for detergent powder because it’s cheap but highly effective. Its formula contains a variety of chemicals, such as baking soda, Sodium dodecyl sulfonate, sodium silicate and detergent grade CMC, etc. Concentrated detergent powder is made by pre-mixing, attaching, conditioning, drying, sieving and other processes. Among them, the addition ratio of CMC varies according to different formulas, and it is generally about 2%.
The role of CMC in detergent liquid is mainly to use its properties of emulsification and protective colloids. The anions generated during the washing process can simultaneously make the surface of the laundry and the dirt particles negatively charged, so that the dirt particles are in the water phase. Phase separation, repels the surface of the solid-phase laundry (the same charge repels), so it can prevent dirt from re-depositing on the laundry, keep white fabrics white, and colored fabrics bright in color.
The ingredient of detergent liquid includes AES, sodium hydroxide, sulfonic acid, sodium chloride and detergent grade CMC, etc. Before dissolving, these ingredients need to be thoroughly mixed under solid state according to the formula, and then the liquid is added and stirred in the same direction continuously. The addition ratio of CMC is about 0.5%-2% according to different formulas, for reference only.