As we all know, plastic products are highly recyclable. There are countless domestic plastic manufacturers, large and small, and most of them will choose recycled plastics for secondary processing. However, with the continuous improvement of people's living standards, there will be higher requirements for the appearance and quality of products. Many plastic manufacturers will ask, do you need to add plastic fluorescent whitening agent to plastics? Is it ok to use titanium dioxide? Let's take you to analyze this problem.

First of all, we need to understand the role of fluorescent whitening agent and titanium dioxide. Although both of them whiten substances, their principles are quite different. A big advantage of titanium dioxide is its low price, but many manufacturers who have used titanium dioxide have found such a problem that after adding a certain amount of titanium dioxide, the whiteness can no longer be improved. Titanium dioxide plays a role of covering, just like a person's face is coated with a thick layer of liquid foundation, which gives people the impression that it is fake white and unnatural, and the addition amount will be very large. Many manufacturers give up after using it because the product looks unnatural.

The plastic fluorescent whitening agent is an optical effect, which can whiten the slightly yellow substrate without damaging the substrate. Its principle of action is that it absorbs invisible light and emits visible light without any chemical reaction. To put it bluntly, it is not that the product turns white, but that it forms white light visible to the naked eye through ultraviolet light irradiation according to the complementary effect of different colors of light, which will increase the whiteness and brightness of plastic products, thus making the white more white and the color more brilliant.