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Why Do Detergents Add Fluorescent Whitening Agents?

Dec. 04, 2019

Why do fluorescent brighteners need to be added to laundry detergents? Are fluorescent brighteners harmful? Ever since fluorescent brighteners became popular with the xxx laundry detergent, these two problems have been lingering in consumers' minds. Today, the Fluorescent Brightener Agent Supplier will talk about the role of fluorescent brighteners in laundry detergents and their safety.


Fluorescent whitening agent is a color conditioning agent, which has the function of brightening and brightening, and is widely used in many fields such as papermaking, textile, detergent and so on. Fluorescent brighteners have about 15 basic structure types and nearly 400 structures. There are two types of fluorescent whitening agents that are allowed to be added to laundry detergents in China: stilbyl biphenyls (such as fluorescent whitening agent CBS, etc.) and bistriazine amino stilbene (such as 33 #, etc.) .


Necessity of adding fluorescent whitening agent in laundry detergent:

The working principle of the fluorescent whitening agent is to absorb the invisible ultraviolet rays in natural light, and then emit visible blue light. After superimposing with the yellow light emitted from the textile, it forms complementary white light, so that the white fabric can obviously feel bright white. It is a brightening effect. When the yellow light is canceled by the blue light, the color of the textile itself will become more prominent, and it will obviously become more vivid and bright. This is the effect of brightening, such as Optical Brightener Agent For Polyester Fiber.


Optical Brightener For Detergent


Optical Brightener For Detergent


Most of the white and colored clothing that is worn daily will be added with a fluorescent brightener in the final stage of processing, which can effectively offset the yellow-gray tone of the untreated fabric and increase the brightness of the textile, thereby increasing the white cotton and white polyester cotton. White and brighten, so that the colored cotton or polyester cotton that needs to be supplemented with blue light can obtain the specific required color. Therefore, in fact, most clothing materials themselves contain fluorescent whitening agents.


However, as the use time of the clothes increases, the fluorescent whitening agent will be gradually lost, and the clothes will start to turn yellow. Adding the appropriate amount of Optical Brightener For Detergent to the laundry detergent can supplement the lost brighteners and play a role in color conditioning, so that the white clothes return to the original bright white, and the colored clothes are more vivid, making the clothes bright and new. Therefore, adding fluorescent whitening agent to laundry detergent can not only wash the clothes clean, but also can adjust the color of the clothes. It is a very important laundry assistant.


Are laundry liquid fluorescent brighteners harmful?

In China, it is allowed to be used in detergents and cosmetics, but in developed countries such as the United States, Japan, and the European Union, the use of washing fluorescent whitening agents has a history of 40 years. The fluorescent whitening agent for laundry liquid is mainly disodium diphenyl diphenyl disulfonate. Tests have shown that the whitening agent will not be absorbed by the skin and has no adverse effect on wound healing. Even if it is eaten by mistake, it can be recovered through normal metabolism. It is excreted quickly and does not accumulate in the body. Even though there may be a small amount of adhesion to the skin during use, it will not react with human skin, and can be easily washed off completely through daily washing activities, such as washing hands and taking a bath. Some businesses specifically indicate "free of fluorescent whitening agents" on their packaging, which should be more in line with the consumer's panic and is a promotional method. However, from the perspective of environmental protection, laundry detergents containing phosphorus should be avoided as much as possible.