What Are The Advantages Of Fluorescent Whiteners

Fluorescent whitening agent can be used in textile printing and dyeing, daily chemical and plastic industries, can stop the production capacity conditioning and product complementarity, there is a big difference between enterprises. Paper is widely used in the paper industry, and secondly in the field of civilized paper. Paper reduces product whiteness, avoids visual fatigue caused by high whiteness, and maintains human health. It has become a new kind of paper with certain development potential. The fluorescent whitening agent for paper making, a traditional product of paper chemicals, is affected by this and the market demand is declining.

Fluorescent whitening agent secondary raw materials D acid and cyanuric chloride exist export tax rebate, while fluorescent whitening agent export has no tax rebate, resulting in enterprises'export products from profit to loss equilibrium.

In the process of consumption, a series of corresponding measures should be taken, for example, in the process of boiling and bleaching, the washing after pickling must be abundant; soaping should maximize the residue of soap; whitening should use soft water and control the alkalinity of pH value (pH 8-9); fluorescent whitening agent should be selected with better acid resistance.

The traditional technological process is scouring and bleaching hot water washing peracid deoxidation water washing. Glacial acetic acid is used after hot water washing. Glacial acetic acid is a volatile acid, which can only neutralize the caustic soda on the surface of the fibers and is difficult to penetrate into the outside of the fibers. Especially for heavy fabrics, caustic soda is often left outside the fibers. Therefore, the use of neutralizing acid can not only neutralize the caustic soda on the outside of the fibers, but also neutralize the caustic soda on the outside of the fibers, so that the effect of complete neutralization can be achieved. At the same time, the time and temperature of overacid should be strictly controlled so as to neutralize thoroughly, so that overacid time can be properly extended. This is especially important for the bleaching of heavy fabrics.

Selection of softeners. Cationic softener, weak cationic softener and ordinary silicone oil can cause yellowing of white fabrics at different levels. Therefore, softeners should be selected and confirmed.

Fabrics should be processed to prevent contact with gases such as acid or chlorine.

Soft water should be used as far as possible to control water quality. Water quality has high hardness, whitening effect will decrease. Heavy metal ions such as acid, free chlorine, copper and iron in water can obviously affect the whitening effect.