Use Of Chelating Dispersant

Although the water used for scouring has been treated to a certain extent, it also contains a certain amount of calcium and magnesium ions, which can promote the deposition of washed impurities on the fiber surface. This is due to the negative charge on the impurity particles adsorbed with anionic surfactant in the solution and the negative charge on the fiber surface. The interaction between the two leads to the redeposition of impurities through the action of calcium and magnesium ions. Chelating agent can integrate calcium and magnesium ions, and play a role of soft water to prevent the redeposition of impurities. Therefore, it is advantageous to add multivalent chelating agent to the scouring agent.