Titanium dioxide application areas
Industrial application
Titanium dioxide is an important white pigment and porcelain glaze. Used in paint, ink, plastic, rubber, paper, chemical fiber, watercolor paint and other industries.
use
Titanium dioxide is the whitest thing in the world. 1 gram of titanium dioxide can paint an area of more than 450 square centimeters white. It is 5 times whiter than the commonly used white pigment - zinc barium white, so it is the best pigment for white paint. Titanium dioxide used as a pigment in the world reaches hundreds of thousands of tons a year. Titanium dioxide can be added to paper to make the paper white and opaque, and the effect is 10 times greater than that of other substances. Therefore, titanium dioxide is added to banknote paper and art paper.
To lighten the color of the plastic and soften the luster of the rayon, titanium dioxide is sometimes added as well.
In the rubber industry, titanium dioxide is also used as a filler for white rubber.
The photochemical properties of semiconductor titanium dioxide have made it useful in many fields, such as the purification of air, water and fluids. Photocatalysts doped with carbon or other heteroatoms can also be used in enclosed spaces or areas with scattered light sources. They can significantly increase the decomposition of airborne pollutants such as nitrogen oxides, aromatics and aldehydes when used in coatings on buildings, pavement slate, concrete walls or roof tiles.
In addition, it is also widely used in the production of sunscreen, non-toxic and harmless to the human body.
Ultrafine titanium dioxide has excellent UV shielding properties and transparency. Widely used in cosmetics, wood protection, food packaging plastics, durable household films, man-made and natural fibers, and clear coatings. The special optical effect in metallic glitter paint makes it valued and applied in luxury car paint.
food application
The U.S. Food and Drug Administration stipulates that titanium dioxide can be used as a white pigment in all foods, and the maximum use amount is 1g/kg Sec. 73.575 titanium dioxide. Pigment additive titanium dioxide can be safely used in general coloring food, subject to the following regulations:
(1) The amount of titanium dioxide does not exceed 1% of the weight of the food.
(2) Colored foods shall not be used in accordance with the special standards published in Section 401 of the Act, unless a similar standard permits the addition of coloring.
(3) For colored food, the edible color additive titanium dioxide can contain appropriate diluent, as a safe color additive, as follows: silicon dioxide, as a dispersing aid, the content does not exceed 2%.