It is proved by practice that only anionic surfactants and non-ionic surfactants are used in the washing of fabrics and the decontamination of fabrics can play a positive and effective role. Therefore, these two surfactants become the main materials for laundry detergent.
The detergent should have good wettability (LBW - 1), permeability, emulsification, dispersibility (LBD -1 dispersant), solubility and foaming and defoaming properties. The combination of these properties is the washing performance of detergent. There are many kinds of detergents, which can be divided into soap, synthetic washing powder, liquid detergent, solid detergent and paste detergent.