Performance Requirements of Titanium Dioxide for Plastics

In the plastics industry, titanium dioxide is the most widely used white pigment. The plastics industry has become the second largest user of titanium dioxide and the growing area in recent years. The global average annual growth rate is more than 6%. It is mainly used in building plastic steel doors and windows (PVC profiles), plastic automotive parts, plastic communication equipment, household appliances and other fields. In addition to its high covering power, high achromatic power and good performance in combination with other colors, it can also improve the heat resistance, light, climate and other properties of plastic products so as to protect plastic products from the invasion of ultraviolet radiation. To improve the mechanical strength and electrical properties of plastic products.

There are more than 500 brands of rutile and anatase titanium dioxide on the global market, of which more than 50 belong to the special purpose of plastics.

Because plastic products are usually much thicker than paints and inks, the amount of titanium dioxide used in plastic products is generally 3-5%.

For titanium dioxide used in plastics, fine particles, good dispersibility, good heat resistance and light resistance are required, and no color change is required in the process of plastics processing and use. It has been found that when titanium dioxide coated with inorganic substances is extruded by blending with plastics, the pore on the smooth surface of plastics will appear due to the evaporation of adsorbed water. Therefore, titanium dioxide coated with inorganic substances is usually treated by organic surface treatment, while the content of titanium dioxide in high-concentration masterbatches is very high. The dispersion of titanium dioxide is required to be higher, so the surface treatment of titanium dioxide is also required to be higher accordingly.

Research and production of titanium dioxide suitable for plastic industry has been successfully put into the market for many years. It has been proved by the production practice of a large number of plastic manufacturers that adding titanium dioxide for plastics in the production of plastic industry can greatly improve the heat resistance, light and climate properties of plastic products, protect plastic products from ultraviolet radiation and improve plastic products. Mechanical strength and electrical properties.