Waste plastics are what we call recycled materials, but relatively speaking, the overall performance and attributes of waste plastics are not as good as new materials and screened recycled materials. But not all plastic products need such comprehensive performance.
According to the performance requirements of a certain plastic product, waste plastics can be recycled and reused and save resources as long as a single attribute of a certain aspect is processed to produce corresponding plastic products.
The price of waste plastic is extremely cheap, and its quality will not be a problem. However, due to various environmental factors and human action, waste plastics have a gray appearance and even serious yellowing. The products produced without treatment have a dark yellow appearance and poor weather resistance, which seriously affects sales.
In order to solve the problems of products produced with waste plastics, such as dark yellow color and poor weather resistance, most manufacturers will choose to add various additives to improve product quality.
Among them, the fluorescent whitening agent is extremely important in the process of rejuvenating waste plastics. After adding the waste plastic products with fluorescent whitening agent, the whiteness and brightness of the products have been greatly improved. Why only fluorescent whitening agent can make waste plastic look new? Because fluorescent whitening agent’s unique fluorescent function can absorb ultraviolet light in natural light, and then convert it into blue-violet fluorescence and emit it. Blue and yellow are complementary colors. When the light waves emitted by the two are the same, the blue light and yellow light mix to emit white light, so the fluorescent whitening agent can make the product yellow and white. Ultraviolet rays are invisible to the naked eye. When it is converted into blue light, it virtually increases the total amount of reflection of the object, thus having a brightening effect.
So, since the fluorescent whitening agent can have the effect of whitening and brightening, is any type of fluorescent whitening agent suitable for use in waste plastics? There are many types of fluorescent brighteners. For products with different properties, only the correct type of brightener can be used to make the fluorescent brightener exert its best effect.
There are also many kinds of fluorescent whitening agents used in waste plastic products on the market. General waste plastics use fluorescent whitening agent OB-1, in special cases 127 or fluorescent whitening agent OB will be used. So what are the characteristics of these three models for waste plastics? 1. The price of optical brightener OB-1 is close to the people. The whiteness is good, and a small amount of addition will have a good whiteness. The disadvantage is that the soft glue should be used very carefully. 2. The brightener FP-127 makes up for the deficiency of OB-1 in PVC soft plastic material, and is more suitable for PVC soft plastic material. 3. If it is a transparent plastic or a special plastic, consider using OB, because OB has good compatibility, good weather resistance, and a wide range of applications.
Post time: Oct-13-2021