The fields of Fluorescent Whitening Agent

Paper

Whiten paper, usually in the pulping, sizing, surface coating and other paper-making processes. The fluorescent brightener is directly added to the paper pulp and then the paper making method is most widely used. Adding fluorescent whitening agent to the surface sizing solution for paper whitening is also very economical, whitening agent tends to stay on the surface of the paper, paper whiteness is easy to adjust.

In food packaging, there are stricter rules. For example, popcorn bucket, etc., must be made of food grade white cardboard. In order to reduce costs, some businesses use recycled waste paper production, but because the pulp quality is not good, have to add a large number of fluorescent whitening agent to achieve the aesthetic effect. In the ULTRAVIOLET analyzer, a popcorn bucket mixed with a large amount of fluorescent whitening agent will appear bright and dazzling blue, while the acceptable packaging made of food-grade white cardboard will appear naturally milky white. Therefore, people buy disposable paper cups and other paper food packaging, should pay attention to the paper is not the whiter the cleaner.

Detergent

In the process of wearing, many clothes will become old and yellow due to various reasons (including the partial loss of adding fluorescent whitening agent in the dyeing and finishing stage), such as the whiteness of white clothes will decrease and colorful clothes will no longer be bright. Although, what have decontamination effect in catharsis things is surfactant and assistant lotion, fluorescent brightening agent itself has decontamination function. However, in the same decontination function, with the appropriate addition of fluorescent brightener laundry detergent after washing clothes, will appear more bright color.

Textiles

Fluorescent whitening agent has been used in textile fiber field for nearly 70 years. Fiber is divided into cellulose fiber, protein fiber and synthetic fiber, so in the use of fluorescent whitening agent, must first understand the chemical composition and physical properties of the fiber, in order to accurately select the appropriate fluorescent whitening agent. Fluorescent brighteners used in textile fiber industry should meet multiple conditions, such as no damage to the fiber, and have a good affinity with it; It has good water solubility. Good chemical stability; There is a better uniform whitening, etc.

Other

With the vigorous development of the plastic industry, people's requirements on the appearance of plastic products are constantly improving, so the use of fluorescent whitening agent to improve the appearance of plastic products has been more and more attention. In addition, fluorescent whitening agent is also used in pearl whitening, coating, leather and other fields.