The difference between gas phase rubber and precipitated rubber is generally because of the different silica, precipitated rubber is ordinary rubber, gas phase rubber tear resistance is better, can be used as a silicone sleeve and other products; The anti-impact life of precipitation glue is relatively long, and it is generally used in key products. The two kinds of glue have their own lengths.

Precipitated rubber is precipitated silica, this kind of product process is complicated by the addition of chemistry, production process is generally: The use of fuel oil or gas in high temperature quartz sand and soda reaction industrial sodium silicate, industrial sodium silicate water prepared into a certain concentration of dilute solution, and then under certain conditions to add some acid, so that silica precipitation out, and then after cleaning, filtering, drying, grinding, production of product silica black. The precipitation method is divided into acid method, sol method, carbonization method and many different specific methods, our country is mainly using acid method. Acid method is to react soluble silicate and sulfuric acid (or other acids) together, when the reaction liquid reaches a certain pH value, stop adding acid reaction, aging, and then filter and repeatedly clean with water, remove Na2SO4, send dry, crushed to get raw materials of silicone rubber products!

Gas phase silica gel (referred to as gas phase rubber) is also called pure silica gel: high transparent appearance, tensile strength of 7.8-10.0mpa, elongation of 500-1000%, tear strength of 29.4-49kN /m, the product after vulcanization molding will not appear when stretching whitening phenomenon, how to pull will not be white, and can be pulled very long. Production is the use of silicon tetrachloride and air combustion of silica, fineness of more than 1000 mesh, used for food grade, medical grade and other special requirements of silica tube.