Silica gel desiccant is a highly active adsorption material, usually with sodium silicate and * reaction, and by the process of a series of aging, acid bulbs and prepared. Silica gel is amorphous material, its chemical formula is mSiO2. nH2O. Insoluble in water and any solvent, non-toxic, odorless, chemically stable, it does not react with any substance except alkali, hydrofluoric acid. Chemical composition and physical structure of silica gel, determines that it has many other features of similar materials difficult to replace. High silica gel desiccant adsorption properties, thermal stability, chemical stability, high mechanical strength. Silica gel desiccant silica gel moisture are different varieties of pouch packaging, the main raw material silica is a highly porous structure of silica aqueous, non-toxic, tasteless, odorless, chemically stable, with strong moisture absorption, is a kind of highly active adsorption material. Usually with sodium silicate and * reaction, and by the process of a series of aging, acid bulbs and prepared. An amorphous silica material, the irregular shape of the transparent sphere, its chemical formula is mSiO2? NH2O. Which is widely used in instruments, meters, instruments equipment, leather, luggage, footwear, textiles, food, medicine and other storage and transportation control the relative humidity of the environment, prevent items from moisture, mildew and rust. [Character] Pore silica gel appearance transparent or translucent glass sphere. Formula: SiO2 nH2O average pore diameter 2.0-3.0nm, specific surface 650-800m2 / g, pore volume 0.35-0.45ml / g, specific heat 0.92KJ / kg?. ℃, thermal conductivity 0.63KJ / m. hr. ℃. Pore ??silica gel, also known as A-type silica gel. [Use] drugs, mechanical, optical electronics, precision instruments, meters, seeds, processed foods, tea, a variety of synthetic textiles, shoes, leather, sports shoes, as well as cultural archives, cameras, arts and crafts and other items all need moisture mildew , it is widely used. Specifically as follows 1, silica gel desiccant can be used for the bottle of medicine, food and moisture. Ensure content drying goods, miscellaneous prevent mold growth. 2, silica gel desiccant can be used as general packaging desiccant. Such as luggage, clothing, footwear, leather etc., to prevent goods in storage or transport due to damp and affect product quality. 3, silica gel desiccant can be easily placed on electronic products, instruments, household appliances, machinery and other products, to prevent the cargo from moisture and affect product quality. 4, silica gel desiccant can be placed within a transport container to prevent the generation of container rain. 5, silica gel desiccant moisture the most suitable environment for room temperature (20 ~ 32 ℃), high temperature (60 ~ 90 ℃), which enables the relative humidity is reduced to about 40%, so the desiccant wide range of applications.