Study on the Use of Fluorescent Brightener in 2022

2022-09-17 17:16


The whitening agent cannot be used together with some raw materials, such as sodium hydrosulfite. This reductive bleaching agent cannot be shared with the fluorescent whitening agent, otherwise, the whitening agent will be damaged and will not play its due role. Sodium hypochlorite, sodium chlorite, chlorine dioxide, chlorine water, chlorine dioxide and other chlorine containing oxidizing bleaching agents cannot be shared with fluorescent whitening agents, otherwise the same will damage the structure of the whitening agent.

First, we will give you a basic range. In most plastics, the amount of fluorescent whitening agent added to each ton of material is between 2/10000 and 1/1000, except for special products, such as whitening masterbatch, which can be added to several kilograms or even dozens of kilograms, because it is masterbatch, so as to pre mix evenly. The more fluorescent whitening agents can be added, the better, but there is still a limit. The key to deciding whether to improve whiteness is ultimately the customer's the final say. The whiteness you like may not be what the customer likes, but whiteness is also a one-sided judgment, so you need to ask more.

The plastic particles used to produce film products are divided into new materials and recycled old materials. Due to the influence of policies and low cost control, more and more manufacturers choose to use recycled old materials to produce films. However, the films made from recycled old materials often face the problem of insufficient whiteness of the products. This problem has plagued manufacturers for a long time. They use new materials to produce films. Although they have improved, they still can not achieve the ideal situation. It is also easy to change color and turn yellow for a long time. After years of research and experiments, we have concluded that many fluorescent whitening agents with stability OB>KCB>FP>KSN>OB-1 will be locally dissolved in plastics at a specific processing temperature. At this moment, fluorescent whitening agents simply migrate in these substrates. Therefore, the fluorescent whitening agent should have excellent mobility resistance and cannot be moved or soaked into other materials. Mainly because the recycled material contains colored impurities, it will absorb blue or blue purple visible light with a wavelength of about 450nm. The reason why the fluorescent whitening agent can improve the appearance of the recycled woven bag and make it white and bright is that the fluorescent whitening agent can absorb ultraviolet light with a wavelength of about 350nm after being adsorbed on the recycled material, and can emit blue or blue purple visible light with a wavelength of about 450nm.

In just a few years, fluorescent whitening agents have played an important role in various fields, from the initial textiles to the later detergents and plastics. Then why add fluorescent whitening agent? What's the effect of fluorescent whitening agent? Before talking about the function of fluorescent whitening agent, we need to know what the whitening principle of fluorescent whitening agent is. White matter generally has fine absorption to blue light with wavelength of 450nm~480nm in visible light. Fluorescent whitening agent FP-127 (FBA37 has a light or milky white crystalline powder in appearance, the absorption peak is 368nm, the fluorescence reflection is 436nm, and the specific gravity is 23g/m3. Fluorescent whitening agent FP-127 has a good whitening effect on all kinds of plastics and plastic products, especially on polyurethane polypropylene and other plastic products. It has a particularly ideal whitening and brightening effect on artificial leather products, and has the advantage of not yellowing or fading after long-term storage.

It has good compatibility with the resin and strong weather resistance. It has a strong atomization concealment effect on PVC resin. The products made by the market product KBKOBPKB and others have exposed reinforcement due to the light transmission of the plate hole. The product is used to prevent reinforcement leakage (the plate hole is not light transmission), and then the problem of exposed reinforcement is solved well. Wide applicability, applicable to all PVCABS engineering plastics and other plastic products.