1. The full name of vapor phase silicone rubber is vapor phase silicone rubber, which is a kind of high-strength silicone rubber mixed with vapor phase silica, and the mixed silicone rubber is mixed with precipitation silica. Therefore, the mixed silicone rubber should be called precipitation silica in a strict sense. The difference between the two is that the fineness of fumed silica produced by fumed silica can reach more than 1000 mesh, while the fineness of precipitated silica produced by ordinary mixed silicone rubber can only reach about 300 mesh;

2. In terms of appearance, compared with mixed silicone rubber, vapor phase silicone rubber has better transparency and looks more shiny in appearance. The gas phase silicone rubber with good quality can be completely transparent, while the mixed silicone rubber can only be translucent, and the mixed silicone rubber with worse quality can even be white;

3. In terms of tensile strength, the biggest difference between vapor phase silicone rubber and mixed silicone rubber is good tensile strength. The mixed silicone rubber after vulcanization and molding of ordinary mixed silicone rubber will turn white after stretching, and will deform under high tensile strength for many times. The biggest feature of vapor phase silicone rubber is that it will not turn white when stretched, and it is very elastic. It will not turn white after repeated high-strength stretching. The tensile strength of vapor phase silicone rubber is between 700% - 800%, while that of ordinary mixed silicone rubber is only between 300% - 400%;

4. In terms of service life, vapor phase silicone rubber has the characteristics of high-strength products and can be used in high-strength environment for a long time. Vapor phase silicone rubber can be used for a long time or even permanently. However, the effective life of ordinary mixed silicone rubber in high-strength environment is only a few days or even directly broken;

5. In terms of price, vapor phase silicone rubber must be much higher than mixed silicone rubber, and the higher the hardness of vapor phase silicone rubber, the more expensive the price will be. The higher the hardness of the vapor phase silicone rubber, the more the proportion of vapor phase silica added, so the price of the vapor phase silicone rubber is affected by the hardness. On the contrary, the higher the hardness of ordinary mixed silicone rubber, the lower the price. Because the cost of precipitated silica is low, the more the addition proportion, the lower the price.

Common points of vapor phase silicone rubber and mixed silicone rubber

1. The sulfur adding methods of vapor phase silicone rubber and mixed silicone rubber can use double 25 vulcanizing agent and odorless vulcanizing agent, and the vulcanization molding process between them is basically the same;

2. Both vapor phase silicone rubber and mixed silicone rubber have excellent high and low temperature resistance and can be used for a long time at - 60 ° C to 250 ° C;

3. Both gaseous silicone rubber and mixed silicone rubber have excellent chemical stability and are not easy to react with acid, alkali and salt substances;

4. Gas phase silicone rubber and mixed silicone rubber have non-toxic and tasteless characteristics, which can fully meet the food grade detection standards;

5. The hardness between the two is the same. Generally, the common hardness is between 20 degrees and 80 degrees.

Disadvantages of gas phase silicone rubber

One of the biggest disadvantages of vapor phase silicone rubber is that it is difficult to deal with the edge tearing after vulcanization molding, which is a result obtained according to the quality feedback of many vapor phase silicone rubber customers after use. Because the vapor phase silicone rubber has excellent elasticity and tear strength, it is difficult to handle the tear edge. The common mixed silicone rubber will not have the phenomenon of edge tearing and difficult treatment.