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In cationic compounds, quaternary ammonium salts exhibit the best performance. Quaternary ammonium salts softeners have several advantages over other types of softeners:

1. They have good softness even at lower dosages.
2. They are suitable for various types of textile fabrics.
3. They have a desirable tactile sensation that is appreciated by consumers.
4. In some cases, they can improve the tear strength and abrasion resistance of fabrics.
5. They do not require high-temperature heat treatment. 

Quaternary ammonium salts softeners can be classified based on their chemical structures into alkyl trimethylammonium salts, dialkyl dimethylammonium salts, amidoamine alkoxymethyl quaternary ammonium salts, and imidazolinium quaternary ammonium salts.Among them, the dialkyl dimethyl quaternary ammonium salts used in garment washing processes exhibit the best softening effect. In the textile printing and dyeing industry, the dialkyl dimethyl quaternary ammonium salts perform better in terms of anti-static properties compared to amidoamine alkoxymethyl quaternary ammonium salts and imidazolinium quaternary ammonium salts.Additionally, during garment washing and softening processes, imidazolinium quaternary ammonium salts softeners provide the best anti-static effect and also exhibit good wetting properties.

Quaternary ammonium salt compounds have evident advantages in the field of fabric softener, and with the continued development of technology, we can look forward to the introduction of new quaternary ammonium salt compounds with exceptional performance.