What fluorescent whitening agent is used for leather whitening?

With the progress of society, the processing technology of all walks of life is more and more advanced, now the variety of leather is more and more. Leather is mainly a kind of fixed and durable material transformed from animal skin through a series of physical and chemical processing. It is soft, tough, not easy to deform when meeting water, not easy to shrink when drying, resistant to heat and humidity, resistant to chemical agents and other properties. It also has the advantages of air permeability and anti-aging. At present, it is also loved by many consumers.

 

In order to improve the whiteness and brightness of leather, improve the appearance and performance of leather, many leather manufacturers will add fluorescent brightener in the production process. Why do we need to add fluorescent brightener in leather? Let's take you to solve this problem.

 

As we all know, the working principle of fluorescent whitening agent is to transform the ultraviolet light in the light into blue light or blue violet light and yellow light to form complementary color. When the two are mixed together, white light will be formed, which makes the leather more white, does not occur chemical reaction, and does no harm to the product itself. Adding fp-127 to the leather is also highly praised by many manufacturers.

 

You must be curious where to add fluorescent whitening agent for leather? The leather processing process is very complex, from raw leather processing to finished products, need to go through dozens of processes: raw leather - soaking - debinding - degreasing - unhairing - soaking - swelling - deashing - softening - soaking - tanning - dissection - smoothing - retanning - neutralization - dyeing - oiling - filling - drying - finishing - finishing - finished fur, in this process need to use dozens of chemical materials. At the same time, we know that the color of leather products is also diverse, among which dyeing is an important process in the leather production process. Through dyeing, leather can be endowed with a variety of bright and firm colors to improve the performance of leather. Fluorescent whitening agent fp-127 is used in the dyeing process.

 

As we all know, leather is generally made of animal skin, which will go through bleaching and deashing processes. Normally, after these processes, the color of leather itself will still appear gray, especially white products. Therefore, for the appearance problems of leather products, most manufacturers will add fluorescent whitening agent fp-127.

 

The amount of fluorescent whitening agent is very small, the proportion is between one ten thousand and three. It is dissolved in solvent and used in the same bath with other auxiliaries. The leather will be white and bright, especially high-grade.