Adding sodium carboxymethyl cellulose (CMC) to washing powder and soap powder has the following important functions:
1. Anti-redeposition effect: During the washing process, the washed dirt particles will be suspended in the washing liquid. Sodium carboxymethyl cellulose can adsorb on the surface of these dirt particles, so that the dirt particles carry the same charge, produce electrostatic repulsion, and prevent the dirt from re-depositing on the surface of the fabric. At the same time, it can also increase the viscosity of the washing liquid, reduce the sedimentation rate of the dirt particles, and further reduce the possibility of dirt redeposition, thereby improving the washing effect and making the clothes cleaner after washing.
2. Dispersion effect: Sodium carboxymethyl cellulose can disperse some insoluble solid particles, such as dust and soil, in the washing liquid to prevent these particles from aggregating to form larger particles that are difficult to wash. It forms a protective film on the surface of the particles to keep a certain distance between the particles, and evenly disperse them in the solution, so that they can be easily washed away with the water flow.
3. Thickening effect: Adding an appropriate amount of sodium carboxymethyl cellulose can increase the viscosity of washing powder and soap powder solutions, allowing detergents to better adhere to the surface of clothing, prolonging the contact time between detergents and dirt, and facilitating the full dissolution and removal of dirt. Appropriate viscosity can also make detergents have better fluidity and operability during use, making it easier for users to use.
4. Stabilize foam: The foam generated during the washing process can carry dirt particles, making them easier to remove. Sodium carboxymethyl cellulose helps stabilize the foam and prevent it from breaking too quickly, thereby maintaining the cleanliness of the foam and its ability to carry dirt and improving washing efficiency.
5. Protect fabrics: Sodium carboxymethyl cellulose forms a thin protective film on the surface of the fabric, reducing the friction between fabrics and between fabrics and washing machine parts during washing, reducing the degree of wear on the fabric, protecting the texture and color of the fabric, and extending the service life of the fabric.
