Textile softener

Softeners are a class of chemicals that change the static and dynamic friction coefficients of fibers.

When the coefficient of static friction is changed, the feel of the touch is smooth and easy to move on the fiber or fabric; when the coefficient of dynamic friction is changed, the fine structure between the fiber and the fiber easily moves, that is, the fiber or the fabric is easily deformed. The combined feeling of the two is soft. The softener is classified into four types of cationic, nonionic, anionic and amphoteric quaternary ammonium salts by ionicity.

Cationic softeners are the most widely used type, which can be divided into quaternary ammonium salt type, fatty acid ester type, right wax type, polyethylene type, silicone resin type and the like, in which the quaternary ammonium salt type softener is soft in the cation. The agent accounts for a large proportion, mainly monoalkyl quaternary ammonium salt, dialkyl quaternary ammonium salt, alkyl acyl quaternary ammonium salt, pyridine quaternary ammonium salt type and imidazole type softener, etc. The quaternary ammonium salt type currently used is soft The monoalkyl quaternary ammonium salts in the agents have gradually been eliminated due to their high toxicity and poor biodegradability; the dialkyl quaternary ammonium salts and the alkyl acyl quaternary ammonium salts have lower toxicity than the monoalkyl quaternary ammonium salts, but their biodegradation The nature is very bad, it will kill the biological bacteria and it will be easily absorbed by the sludge during the sewage treatment to contaminate the farmland. Therefore, it was stopped in Germany, Holland and other countries in the early 1990s, and the European Union released on May 15, 2002. The Eco-Label expressly banned the use of bis[hydrogenated tallow alkyl] dimethyl ammonium chloride, bis[stearoyl]dimethylammonium chloride, and bis[tallow alkyl]dimethyl ammonium chloride. Formulations or formulations consisting of them; as regards imidazole type (eg softener IS) and pyridiniumquat type (eg V It is difficult for cationic softeners such as elan PF) to have a low BOD, and it is difficult to deal with degradation using conventional biochemical methods. Although they have not been forbidden at present, their use according to ecological requirements is also problematic.

classification:

Silicone slippery effect is better, the biggest drawback is that the price is expensive, high cost, easy to use and cause drift oil. Not suitable for long-term development in increasingly competitive modern industries;

Films are mainly based on fatty acid salts and are relatively easy to use. However, the amount of such softener films is relatively large and the cost is relatively high. It is not suitable to reduce the overall cost and increase the demand for industrial profits;

D1821 is also dioctadecyldimethylammonium chloride. The biggest drawback of these softeners is poor biodegradability and serious yellowing. With the increase of public awareness and environmental quality requirements, such products cannot meet the requirements. Social development needs;

The ester quaternary ammonium salt has stable soft performance, small dosage, prominent biodegradability, and more functions such as anti-yellowing, sterilization and sterilization. It can be said that such softener products are a dominant trend in the future softener industry.