The Difference between Gas-phase Silicone Rubber Products and Precipitation Silicone Rubber Products
There are two kinds of silica gel: precipitation silica gel and gas phase silica gel. We will show you that gas-phase silica gel has excellent heat resistance, ozone resistance and chemical erosion resistance. Gas-phase silica gel also has excellent electrical insulation properties. What is the difference between precipitation silica gel and gas phase silicone rubber?

The differences between gas phase silicone rubber products and precipitation silicone rubber products are as follows:

1. Silica gel products of precipitation method will whiten when stretching, and the stretching rate is not good, but that of gas phase method is different. Silica gel products will not whiten when stretching, and the maximum elongation at break can reach more than 700%.

2. The raw material cost of gas-phase silicone rubber products is higher than that of precipitation silicone rubber products. The tensile strength, tear strength and elongation at break of gas-phase silicone rubber products with the same hardness are better than those of precipitation silicone rubber products, and their environmental protection index is also higher.

3. The appearance of gas-phase silica gel products is transparent. The appearance of precipitation silica gel products is opaque or translucent.

4. Gas phase method is the production of silicon dioxide by using silicon tetrachloride and air combustion. Its fineness is over 1000 meshes. Precipitation method is the production of silicon dioxide precipitated by adding sulphuric acid into sodium silicate. The fineness is only 300-400 meshes.

5. Gaseous silica contained in gaseous silicone rubber is expensive and not easy to absorb moisture. It is mainly reinforcing in rubber. Silica black in precipitation silicone rubber is cheap and easy to absorb moisture. The main filling effect is in rubber.