What is a fluorescent whitening agent?

British physicist George Gabrielstokes first expounded the fluorescent phenomenon in 1852. In 1929, KRAIS.P first discovered that 6,7-dihydroxybolic beanins had fluorescent whitening effects; in 1940, German IG company developed a fluorescent whitening agent with practical value and began its commercialization process.

In 1959, the former Tianjin dye factory produced my country's first fluorescent whitening agent -V B L (C.I.85), which belongs to the type of bisotinorine. In 1966, the former Ministry of Chemistry Industry issued the chemical industry standard (departmental standard) of the variety, which was numbered HG 2-382-66, which is the first industry standard for my country's fluorescent whitening products. The product standard has now been upgraded to GB/T 10661-2003 "A fluorescent whitening agent VBL". The fluorescent whitening agent was first used in the textile printing and dyeing industry in my country. In the late 1960s, fluorescent whitening agents began to use in the synthetic detergent industry, and were only used in the papermaking industry in the 1970s.

The use of fluorescent whitening agents is very extensive. From the beginning of textiles, it is widely used in papermaking, detergent, plastic, coatings, ink, leather and other fields. With the rapid economic development, the use and amount of fluorescent whitening agents are still expanding. At present, the textile industry is no longer the area with the largest fluorescent whitening agent. In all countries in the world, the proportion of fluorescent whitening agents in different industries is different.

The application of fluorescent whitening agents in the field of textile industry has a history of nearly 70 years. It is loved by dyed and consumers due to its unique white and gorgeous effects on textile fibers. At present, there is no corresponding technology that can replace the fluorescent whitening agent.

Some people think that the fluorescent whitening agent can be replaced by bleaching. Moreover, some products do have studies in this regard. For example, the whiteness requirements of the fabric are achieved by multiple bleaching through chlorine drift and oxygen drift, but the transition bleach is prone to damage the fiber, resulting in a strong decline in clothing when wearing clothing.

The application of fluorescent whitening agents on textiles is required, and at least the following five aspects should be met:

① No damage to the fiber and have a good knot;

② Have good water solution;

③ Have good chemical stability;

④ Have a better uniform whiteness;

⑤ Harm about the environment and so on.

According to the type of chemical structure, the fluorescent whitening agents used in the textile industry mainly include six categories:

① Trinity of dihazine amine amine (type;

② Types of pye styrene linked;

③ Types of biprene;

④ Type of the pyephrerarythrhylene;

⑤ Type of pyrine;

⑥ Corinin type.

When using a fluorescent whitening agent, according to the chemical composition and physical performance of the fiber, the appropriate fluorescent whitening agent must be selected to obtain a satisfactory whitening effect.