This kind of softener variety is more, is currently used the most common softener.
Mainly because most of the fiber in water with negative charge, cationic softener easy adsorption on the fiber surface, combined with strong ability, high temperature resistance, washing resistance, and after finishing the fabric rich and smooth, can improve the wear resistance and tear strength of the fabric, synthetic fiber also has a certain antistatic effect. Therefore, it is widely used in cotton, nylon, acrylic and other fabrics, but also for silk. However, some cationic softeners tend to cause yellowing and decrease color fastness to light at high temperature. Cationic softener is octadecylamine or dimethyloctadecylamine derivatives or stearic acid and polyvinyl polyamine condensation. According to its structure, it can be divided into tertiary amine softener, quaternary ammonium salt softener, imidazoline quaternary ammonium salt softener, dialkyl dimethyl quaternary ammonium salt softener, etc.