Before the whitening and coloring of plastics, toner and fluorescent whitening agent were directly added, and then stirred evenly. This method is easy to produce dust, which not only wastes more but also causes environmental pollution. With the introduction of bright white masterbatch, the whitening and coloring process of plastics has been thoroughly improved.

Bright white masterbatch has great advantages: in the process of processing, under the action of additives, bright white masterbatch is fully mixed and completely combined with carrier resin. When it is used, it is placed in the resin to be processed according to a certain proportion, and the bright white masterbatch quickly enters the role, and it is recognized as "in-laws" with the resin.

Today, our topic is the commonly used brightening agent for bright white masterbatch-fluorescent brightening agent OB. The appearance of fluorescent whitening agent OB is light yellow powder, which is weather-resistant, heat-resistant, sun-resistant, fade-resistant, high-temperature resistant, excellent in whitening, brightening and brightening performance, high in whitening strength and strong in fluorescence. Dissolve and disperse evenly in the product. In the filling master batch, the addition amount is two ten thousandths to five ten thousandths; In the bright white masterbatch, the addition amount is 5% to 1%, and the addition ratio can be adjusted according to the concentration requirement.

Fluorescent whitening agent OB is commonly used in some high-end plastics, and many manufacturers may use OB of European brand, because it is a European brand after all. However, by comparison, there is little difference between Chinese OB and European OB. The melting point of European OB is 201.5, and that of our OB is 201.6, which means its E value, that is, the fluorescence intensity. The E value of European OB is 1165, while that of our OB is 1168. There is basically no difference between the two products in terms of these two important data. From their solubility, the solubility of our OB can reach 6%, and that of European OB is 5.8%.  Then there is the price aspect. The price of Chinese OB is nearly half lower than that of European OB, so it is clear which OB to choose.