Titanium dioxide is a commonly used colorant in the rubber products industry, especially white rubber products. It has the functions of reinforcement, anti-aging and filling in rubber products. At present, with the continuous development of production equipment and technology for recycled rubber, more light-colored recycled rubber varieties have appeared to meet the color needs of various light-colored rubber products. So when using recycled rubber to produce white rubber products, is it possible to use titanium dioxide, what role does titanium dioxide play in light-colored recycled rubber products? How much is appropriate?
1. Application characteristics of different types of titanium dioxide in rubber products
Among the common white pigments, titanium dioxide has a strong tinting power and a strong hiding power in white rubber products. Titanium dioxide includes rutile titanium dioxide and anatase titanium dioxide. Among them, rutile titanium dioxide has excellent weather resistance, heat resistance, and ultraviolet resistance, and is not easy to yellow. Anatase titanium dioxide has high whiteness, large hiding power, and good rubber properties. Medium dispersibility is good, but heat resistance and light resistance are poor. White recycled rubber products are mostly processed with white latex recycled rubber. In theory, titanium dioxide can be used for coloring.
2.How to choose titanium dioxide for white recycled rubber products
The price of rutile titanium dioxide on the market is generally higher than that of anatase titanium dioxide. Anatase titanium dioxide has poor heat resistance, light resistance, and poor ultraviolet performance. Therefore, when using recycled rubber to produce outdoor white rubber products, rutile titanium dioxide is mostly used. Recycled rubber products can use anatase titanium dioxide, which is more cost effective.
3. How much is the titanium dioxide used in white recycled rubber products?
Titanium dioxide has good dispersibility in rubber, and it can be blended with more than 40 parts in rubber. The use of recycled rubber to produce white rubber products can effectively reduce the production cost of rubber products. The price of titanium dioxide is much higher than that of recycled rubber. The large amount of titanium dioxide used in the production of white recycled rubber products is undoubtedly an increase in cost. Combined use reduces raw material costs. It should be noted that the coloring ability of white pigments in recycled rubber is proportional to the concentration of titanium dioxide in mixed white pigments, and the amount of titanium dioxide should not be too small.
From the perspective of coloring ability, the production of white rubber products from recycled rubber using titanium dioxide as a coloring agent has a better coloring effect; but in terms of cost, the smaller the amount of titanium dioxide used in the production of white recycled rubber products, the better, it is best not to use. Therefore, when using recycled rubber to reduce the production cost of white rubber products, try to use white recycled rubber such as white latex or light-colored recycled rubber, reduce the amount of titanium dioxide and other white pigments, and reduce more raw material costs.