As a common inorganic compound, silica is widely used as a filler in the plastic industry due to its good chemical stability and excellent physical properties. The following are the specific applications of white carbon black as a filler in the plastic industry and the benefits it brings:

1. Improving the mechanical properties of plastics
As a filler modifier for plastics, white carbon black can significantly improve the hardness, strength and wear resistance of plastics. Adding an appropriate amount of silica to plastics such as polyethylene and polypropylene can significantly enhance the mechanical properties of plastics, making them tougher and more durable.

2. Enhance the thermal stability of plastics
Silica has good thermal stability. Adding it to plastics can reduce the thermal deformation of plastics under high temperature conditions and extend the service life of plastics. This is especially important for plastic products that need to work in high temperature environments.

3. Improving the processing properties of plastics
Silica is easy to disperse in the plastic matrix, which can improve the processing properties of plastics and make plastics easier to form and extrude during processing. This helps to improve the production efficiency of plastic products and reduce costs.

4. Improve the UV resistance of plastics
Silica has excellent UV absorption and can be used as an anti-UV agent for plastics to prevent plastics from aging rapidly under UV radiation. This helps to extend the service life of plastic products and maintain their good appearance.

5. Optimize the appearance and color of plastics
Silica has good tinting power and can be used as a pigment or pigment filler for plastics to improve the appearance and color of plastics. At the same time, silica can also play a matting role, giving plastic products a softer appearance.

6. Use as a flame retardant
Adding silica to plastics can also improve the flame retardant properties of plastics, making them less likely to burn or slowing down the burning process, thereby reducing pollution and harm to the environment.

In summary, silica as a filler has broad application prospects and significant benefits in the plastics industry. It can not only improve the mechanical properties, thermal stability and processing properties of plastics, but also improve the UV resistance, appearance and color, and flame retardant properties of plastics. With the development of science and technology and the deepening of research, the application of silica in the plastics industry will be more extensive and in-depth.