Oct. 11, 2019
As soon as the fluorescent whitening agent hears the name, people have doubts about it. It feels that its food additives are not good for the human body. So is this the case? Let's find out.
The first thing to know is what is the fluorescent additive? Fluorescent whitening agent, a Fluorescent Dyestuff, or white dye, is also a complex organic compound. Its characteristic is to stimulate the incident light to produce fluorescence, so that the dyed material has the effect of sparkling like fluorite, so that the material seen by the naked eye is very white. This property of fluorescent whitening agents makes it suitable for a wide range of applications such as paper, plastic, leather, and detergents. At the same time, fluorescent whitening agents are also used in many high-tech fields, such as fluorescence detection, dye lasers, anti-counterfeiting printing, etc. Even high-sensitivity films for high-altitude photography are used to improve the sensitivity of photosensitive latex. Brightener. So what are the specific application areas of fluorescent whitening agents? We will give the answer to you as Fluorescent Brightener Manufacturer.
Whitening of paper is usually carried out in papermaking processes such as beating, sizing, and surface coating. The method of directly adding the fluorescent whitening agent to the pulp and then performing papermaking is mostly applied. It is also economical and practical to add a fluorescent whitening agent to the surface sizing solution to whiten the paper. The whitening agent tends to stay on the surface of the paper, and the whiteness of the paper is easily adjusted. In the field of food packaging paper, there are stricter regulations. For example, popcorn buckets, etc., must be made of food grade white cardboard. Some merchants use recycled paper to reduce costs, but because of the quality of the pulp, a large amount of fluorescent whitening agent has to be added to achieve aesthetic effects. Under the UV analyzer, the popcorn bucket with a large amount of fluorescent whitening agent will show a bright and dazzling blue color, while the qualified packaging made of food grade white cardboard will show a natural milky white color. Therefore, when people buy paper food packaging such as disposable paper cups, it should be noted that the whiter the paper, the cleaner it is.
Many clothing is worn during the wear process, which causes yellowing due to various reasons (including the loss of the fluorescent whitening agent added during the dyeing and finishing stage). For example, the whiteness of the white clothing is reduced, and the colored clothes are no longer vivid. Although detergents and builders are used for decontamination in detergents, the optical brighteners themselves do not have a decontaminating function. However, under the same decontamination function, the clothes washed with the laundry detergent with the appropriate addition of the fluorescent whitening agent will appear more brightly colored.
Optical Brightener For Cotton Fabric
Fluorescent whitening agents have been used in the field of textile fibers and have been in existence for nearly 70 years. Fibers are classified into three types: cellulose fibers, protein fibers and synthetic fibers. Therefore, when using fluorescent whitening agents, the chemical composition and physical properties of the fibers must be known in order to select a suitable fluorescent whitening agent. Fluorescent whitening agents for textile fabrics, including Optical Brightener For Cotton Fabric, should meet multiple conditions, such as no damage to fibers, and have good affinity; have good water solubility; have good chemical stability Sex; have good uniform whitening and so on.
With the vigorous development of the plastics industry, people's requirements for the appearance and performance of plastic products are constantly increasing. Therefore, the use of fluorescent whitening agents to improve the appearance of plastic products has received increasing attention. In addition, fluorescent whitening agents are also used in the fields of pearl whitening, paint, leather and the like.
It can be seen that fluorescent whitening agents generally appear in daily chemical products. Add fluorescent whitening agent to the detergent. Simply put, just add baking soda to the flour of the steamed bun, plus the baking soda is soft and delicious, and the washing product with fluorescent whitening agent will wash the clothes. Bright color and brightening are beneficial and harmless. They are the crystallization of the progress of science and technology and the summarization of human experience. On this issue, international and domestic views are also highly unified. In developed countries such as Europe, America and Japan, fluorescent whitening agents are written into the law as legal additives. As early as 1999, in order to thoroughly verify the safety of fluorescent whitening agents, the European Chemical Industry Association took a five-year safety assessment and concluded that fluorescent whitening agents are safe for humans and nature. There are standardized national implementation standards in China, and the China Washing Association has spared no effort to carry out popular science. It has repeatedly issued a solemn statement on this matter. The addition of fluorescent whitening agents to detergents is unclear and clear. It should be said that this is a basic consensus and common sense of an industry, and it is clear. But even in the face of such facts, there are still people who are racking their brains and playing tricks, such as standing white.
It turns out that fluorescent whitening agents are safe. Don't believe that advertising “does not add fluorescent whitening agents” is a flicker. Everyone needs to work together to resist and prevent social turmoil caused by the trust crisis.
So come to the conclusion that the fluorescent whitening agent:
1. No irritation to the skin.
2. No adverse effects on wound healing.
3. Fluorescent whitening agents are water-soluble and can be quickly excreted from the body through normal metabolism.
4. Fluorescent whitening agent has no teratogenicity.