Mar. 17, 2020
Textile fibers will gradually turn yellow during use and washing. The yellowing is mainly due to two aspects: one is that the macromolecules that make up the textile fiber itself are yellowed due to the action of light, thermal climate and other chemical substances; And other physical attachment and redox yellowing, light yellowing and hot yellowing of these secretions. Therefore, restoring or increasing the original whiteness of the fabric has become a problem in the past.
White yellowing is due to the lack of relative intensity of the blue band light rays from the light reflected from the irradiated material. Therefore, in the early days, people used some blue direct dyes to "blue" the fabric to visually hide the yellowing of the fabric. However, the resulting decrease in the brightness of the fabric also caused a dim feeling visually. The appearance of fluorescent brighteners has solved the problem of yellowing of fiber fabrics. So what is the magic effect of detergents with fluorescent whitening agents? The Fluorescent Brightener Agent Manufacturer will come to tell you next.
Optical Brightener For Detergent
Optical Brightener is a fluorescent dye that is added to detergents or soaps through a certain method. It is adsorbed on fabric fibers during the washing process, and most of them remain on the fibers after washing. The fluorescent whitening agent on the fiber converts the absorbed ultraviolet light into visible blue-violet fluorescence. This blue-violet fluorescence complements the yellow light carried by the fiber and visually makes the washed white fabric more white and white. Bright; makes light-colored fabrics more vivid. This is why fluorescent whitening agents have been widely used in the synthetic detergent and soap industries, and the purpose is. At the same time, due to the addition of fluorescent brighteners, the washing effect of detergents and soaps is also improved visually. This is because the fluorescent brightener itself does not have the ability to decontaminate, only the whitening and brightening effect.This effect is the common result of the light reflection effect of the clean surface of the washed and decontaminated article, which makes the washed article visually. It looks cleaner, white items look whiter, and reduces the yellowing of the fabric during use and washing, making the color and pattern of light and printed fabrics more distinct.
Washing fabrics with detergent or soap added with fluorescent whitening agent will make the fabric more white and brighter within a certain number of washing times, and will increase with the increase of the content of fluorescent whitening agent in the laundry product. After the number of times, the whiteness change is not significant. If the content of fluorescent whitening agent in the washing product is very low, the whitening effect on the fabric to be washed will not be obvious.
If the detergent does not contain a fluorescent whitening agent, the whitened fabric will gradually wash away the existing fluorescent whitening agent on the original fabric due to the action of the surfactant, and the whiteness of the fabric will vary with the number of washings. The increase gradually decreases, and the luster gradually disappears, giving people a feeling of getting washed and darkened. It also makes people feel that detergents or soaps that do not contain fluorescent brighteners do not wash well. With Optical Brightener For Detergent whitened fabric, the amount of fluorescent whitening agent washed from the fabric and the amount of fluorescent whitening agent in the detergent can be balanced on the fabric, so that the whiteness of the fabric can be maintained, Brightness and vividness are largely unaffected.
It can be seen that to make the fluorescent whitening agent play the best whitening effect in detergents and soaps, it is extremely important to match the appropriate amount, which is also the concern of detergent and soap manufacturers.