Many friends have such doubts about silica or carbon black for silicone rubber rollers? In fact, silica refers to silica, because it can completely replace carbon black without changing the production process, and it is white powder Therefore it is called silicone. Whether the carbon black used for silicone rubber rollers is silicone or carbon black depends on the color requirements of the silicone rubber rollers, and other parameters are the same. Here we take silica as an example to teach you how to choose silica for silicone rubber rollers.
The relationship between the properties of silicone rubber rollers and silica
1. The larger the specific surface area of silica, the more obvious the reinforcing effect on the silicone rubber roller, but the compression permanent deformation becomes larger.
2. When the specific surface area of carbon black reaches more than 200, it will affect the dispersion of white carbon black in the silicone rubber roller, and reduce the performance.
3. Silica with a larger specific surface area can be used for organic treatment in the covering compound of the silicone rubber roller to improve the dispersion.
Silica Requirements for Silicone Rubber Rollers
Silicone rubber rollers are usually used in laminating machines, and their covering materials not only need to have high temperature resistance, but also need to have good mechanical strength and low compression set. Therefore, when choosing carbon black for silicone rubber rollers, it is necessary to look at the correlation between the specific surface area of silica and the dispersion of silica in rubber and the performance of silicone rubber rollers.