As we all know, silica gel can be divided into two categories: organic silicon and inorganic silicon.
Inorganic silica gel is a kind of highly active adsorption material, which has many characteristics that are hard to be replaced by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc., household use as desiccant, humidity regulator, deodorant, etc.; industrial use as hydrocarbon decolorizer, catalyst carrier, pressure swing adsorbent, etc.; separation and purification agent for fine chemicals, Beer stabilizer, coating thickener, toothpaste friction agent, matting agent, etc.
Organic silica gel is a kind of organosilicon compound, which contains Si-C bond and at least one organic group is directly connected with silicon atom. Traditionally, those compounds which connect organic group with silicon atom through oxygen, sulfur, nitrogen, etc. are also regarded as organosilicon compounds. Among them, polysiloxane, which is composed of siloxane (- Si-O-Si -) as the skeleton, is the most number of organosilicon compounds, the most studied and widely used one, accounting for more than 90% of the total amount.
The manufacturing process of silica gel can be divided into extrusion and molding:
It is common to extrude silica gel, for example, the sealing ring on the household electric rice cooker, which is called the silica gel sealing ring of the electric rice cooker.
Molding silica gel is a bit more complex, irregular shape, including silica gel bowl, silica gel ice lattice, silica gel cake mold and so on.Silicone rubber is a kind of synthetic elastomer made of filler reinforced crosslinked silicone polymer. It realizes the incomparable combination of chemical and mechanical properties of organic elastomer.
What are the advantages of this kind of material?
First: it has a longer service life in harsh environment and is not affected by weather for a long time - rain, snow, humidity, ozone, solar ultraviolet (UV); organic elastomers may become brittle after long-term exposure to the environment.
Second: when exposed to severe environmental stress (heat, cold, humidity, oil, ozone, UV), its inherent good electrical insulation quality will not change significantly.
Third: it can keep its natural flexibility and elasticity (anti compression deformation) in a wide temperature range, and improve the comfort and feeling of consumer goods.
Fourth: good sealing performance.
Fifth: safety and environmental protection, widely used in food processing tools, baby products and other aspects.
Sixth: more choices - wider hardness range (from shore A10 to 80), wider color selection range (from transparent to bright colors).
Seventh: wider temperature range - from - 100oC to 316oc (- 148 to 600of); organic elastomers will soften and deform irreversibly when the temperature is over 100oC (212oF), and become brittle when the temperature is below 25oC (- 13of).
Eighth: better liquidity - easier to manufacture, higher productivity. Silica gel products are now widely used in people's lives.
The potential of China's silicone rubber industry is unlimited, and the linkage effect of upstream and downstream industries of silicone rubber industry has begun to appear gradually. The development is very rapid. According to statistics, if the proportion of silicone rubber in China's rubber consumption increases from 6.5% to 33% by 2020, the overall domestic self-sufficiency rate of China's rubber can be increased from about 50% to more than 80%. It can be said that the market potential is Infinite.