Why There Must be Titanium Dioxide in White Masterbatches ?
As we all know, white in plastic products are increasingly widely used, the quality requirements are also increasingly high, the real impact of white masterbatch quality factors, in addition to the excellent resin, titanium dioxide in which has a vital role.
Titanium dioxide applied to plastics, fibers have their own specialized performance indicators. Titanium dioxide is an important white pigment for plastics, which can make plastics effectively scatter visible light and give whiteness, brightness and opacity. At the same time, its processability should also be considered, so there should be certain requirements for the above properties.
(1) Whiteness
Because the plastic itself has color and transparency, its own whiteness is obviously different, so in a variety of titanium dioxide whiteness comparison, should be the same species of plastic.
(2) Opacity
Titanium dioxide can strongly scatter or refract light, if there is enough titanium dioxide in the plastic products, all the light shining on its surface is reflected, the product appears opaque and white.
(3) Dispersibility
Dispersibility refers to the dispersion of the pigment in the medium being colored. The particles of titanium dioxide exist in three states: primary particles, cohesions, and agglomerates. The dispersion of titanium dioxide in plastics is the process of agglomerates being broken into cohesive primary particles followed by newly generated particles stabilized.
(4) Processability
Titanium dioxide added to plastics, will have an impact on the processing rheological properties of plastics. The higher the content, the more significant this effect will be. In the production of white masterbatches (especially the high concentration varieties), the processing of titanium dioxide becomes a key factor in determining the production efficiency and cost.
