How can recycled plastics become as white as new materials?

Where there are people, there are plastics. It can be seen that plastics play a very important role in our life. More plastics are used, resulting in more white pollution. In order to avoid the pollution of plastics to the environment, most recycled plastics will be recycled.

 

Compared with new materials, the biggest advantage of recycled plastics is its low price and good performance, but the biggest problem is the appearance of products. The use of recycled plastics to a large extent to avoid the waste of resources, the state is also vigorously promoting the recycling of recycled plastics. But in order to make the appearance of recycled plastics beautiful, it is inevitable to add plastic additives in the production process, fluorescent whitening agent to solve the problem.

 

Many people think fluorescent whitening agent is whitening, so the appearance must be white, in fact, it is not. The whitening principle of fluorescent whitening agent is different from that of titanium dioxide. It uses the complementary principle of color and light to whiten. The reason why the appearance of recycled plastic is yellow is that after long-term use of plastic products and repeated extrusion, more yellow light is reflected.

 

Fluorescent whitening agent can whiten because fluorescent whitening agent can absorb ultraviolet light that we can't see, thus emitting blue or blue violet fluorescence. Through color light complementary, blue light and yellow light combine to form white light, so the appearance of recycled plastics will be greatly improved.

 

The use of fluorescent whitening agent in recycled plastics is very simple. Firstly, the recycled plastics are cleaned and crushed, followed by granulation. The fluorescent whitening agent can be used before granulation. The crushed plastics and whitening agent are put into the mixer to mix well, and then hot-melt granulation is carried out. The operation is very simple.

 

At present, the recycling rate of plastics in China is very high, and the market is also very broad. In order to occupy the market, it is particularly important to choose a suitable whitening agent. Choosing the right whitening agent can not only make your product whiter, but also save cost.