Liquid silica gel is divided into two kinds of vapor silica gel and precipitation silica gel. There are certain differences in the production process, product performance and application range of these two kinds of silica gel. The following take you to understand the differences between vapor silica gel and precipitation silica gel.

First, production technology
Gas phase production is the use of silicon tetrachloride and air combustion of silicon dioxide, the fineness of more than 1000 mesh, precipitation production is the use of sodium silicate after adding sulfuric acid to precipitate silica, the fineness of only 300-400 mesh.

The white carbon black produced by gas phase white carbon black is expensive and does not absorb moisture easily. Use in paint as a matting agent. Precipitation method of white carbon black is cheap, easy to absorb moisture. Can only be used in rubber, plastic products filling reinforcement.

Two, product performance
Precipitation method of liquid silicone elongated will be white, and can not pull very long, and the gas phase is not the same, how to pull the gas phase will not be white, and can pull the relatively long will not break. Good gas phase glue can be pulled to more than 700%, and the transparency of gas phase glue is higher than that of precipitation glue.

The tear strength of silica rubber reinforced by gas phase method is better than that of silica rubber reinforced by precipitation method. Gas phase transparency. Opacity or translucency of precipitation.

The cost of silicone rubber produced by gas phase silica gel is higher than that by precipitation method. Therefore, the tensile elongation of gas phase rubber with the same hardness is better than that of precipitation rubber, and its environmental protection index is also higher. Gas phase silica gel is generally formed 10:1 transparent silica gel, precipitation silica gel is generally formed 1:1 translucent silica gel.


Three, the scope of use
Gas phase silica gel tear resistance is better, suitable for: inside the product, pressure cooker ring, silicone wire and so on; Precipitation method silicone strike life is better, suitable for: remote control button, mobile phone button, foot pad, etc.