01. Application in tires
Silica is used as a reinforcing agent, and the largest amount is in the rubber field, which accounts for 70% of the total. Silica can greatly improve the physical properties of the compound, reduce the lag of the compound, and reduce the rolling resistance of the tire without losing its wet skid resistance. In the rubber industry, carbon black is a very effective reinforcing agent, and its biggest disadvantage is that it cannot be used to prepare colored products. Ultrafine white carbon black is used as a reinforcing filler to produce green tires. It can be used in the sidewall instead of carbon black. It can significantly increase the tear strength and crack growth resistance of the sidewall, but has no obvious effect on the vulcanization time and is resistant to ozone. Aging is dependent on antioxidant and silica levels. Adding silica to the tread compound of tires can improve the cutting resistance and tear resistance of the tread, and reduce the jumping and falling blocks. Compared with ordinary carbon black filled compounds, the rolling resistance of silica filled compounds can be reduced by 30%.

02. Application in defoamer
Fumed silica generally has two types of products: hydrophilic and hydrophobic. Among them, the hydrophobic product is obtained by surface chemical treatment of the hydrophilic product. Now various defoamer manufacturers generally use hydrophobic fumed silica. The hydrophobic group on its surface is used to attract the hydrophobic end of the surfactant in the foaming system, so that the hydrophobic solid particles become hydrophilic, thereby reducing the concentration of the surfactant in the foam, promoting the bursting of the foam, and improving the defoaming. speed.

03. Application in paint and coating industry
Silica can be used as a rheology aid, anti-settling agent, dispersant, and matting agent in coating production, and has the functions of thickening, anti-settling, thixotropy, and matting. It can also improve the weather resistance and scratch resistance of the coating, improve the adhesion strength between the coating and the substrate and the hardness of the coating, improve the aging resistance of the coating, and improve the characteristics of ultraviolet absorption and infrared light reflection.

04. Application in electronic packaging
By fully dispersing the surface-active treated fumed silica in the silicone-modified epoxy resin encapsulant matrix, the curing time of the encapsulation material can be greatly shortened (2.0-2.5h), and the curing temperature can be reduced to room temperature , so that the sealing performance of the OLED device is significantly improved, and the service life of the OLED device is increased.
The addition and application of fumed silica has reduced the process of electronic device encapsulation that used to require special environments to be reduced to room temperature conditions, greatly reducing production costs, and shortening the curing time of packaging materials, greatly improving production efficiency and reducing production costs. It will promote the popularization and application of a new generation of OLED display technology.

05. Application in plastics
White carbon black is also often used in new plastics. Adding a small amount of white carbon black during plastic mixing will have a significant reinforcing effect, improve the hardness and mechanical properties of the material, and thus improve the processing technology and product performance. In addition, silica has the characteristics of small particle size and high light transmittance, which can make plastics denser and increase the transparency of plastics.