Inorganic silica and organic silica gel points. Silicone rubber is synthetic rubber in the special, which is divided into solid and liquid state under the form. Divided into liquid at room temperature according to curing temperature and high temperature curing type curing type.
The main ingredient is inorganic silicon dioxide, is a sodium silicate from the silica in sulfuric acid with a machine made of amorphous materials. It consists of minerals that exist in nature, by washing, processed into granular or beaded.
Its structure is like a sponge, each connected by a small hole to form a huge surface area of capillary adsorption system can absorb and preserve moisture. 100% humidity conditions, it can absorb and condense the equivalent of 40% of its weight of water vapor.
As a desiccant, silica gel, the average pore size 24 Angstrom (unit of length), which even when the temperature is higher than 105 ℃ able to absorb moisture, but when the temperature is higher than 38 ℃, it began to decrease the moisture absorption rate, it's the most good moisture conditions in the 21 ℃ - 32 ℃, relative humidity even higher 60% - 90%, also the relative humidity inside the container can be maintained at 40%.
As the chemical properties of silicone safety, security, high, non-toxic and non-corrosive, making it by the U.S. FDA approval for food and pharmaceutical industry. Silicone material on the package a wide range of options, generally OPP / PE, PET / PE film, non-woven, compound paper and so on.
1, silicone Features
Silica gel is a highly active adsorption material, usually with sodium silicate and sulfuric acid reaction, and by aging, acid bulbs and a series obtained after the treatment process. An amorphous silica material, its chemical formula is mSiO2. nH2o. Insoluble in water and any solvent, non-toxic tasteless, chemical stability, in addition to alkali, hydrofluoric acid did not interact with any matter outside the reaction. Various types of silica gel formed by different manufacturing methods because of their different pore structure. Silicone chemical components and physical structure, determines its many other similar materials, irreplaceable characteristics: adsorption high-performance, thermal stability, chemical stability, higher mechanical strength.
Silica gel according to the size of the aperture is divided into: large pore silica gel, coarse pore silica gel, B-type silica gel, pore silica gel. Because the different pore structure, so they have their own characteristics adsorption. Thick porous silica in the case of high relative humidity had a higher adsorption capacity, pore silica gel in the case of low relative humidity higher than the coarse pore silica gel absorptive capacity, while B-type silica gel pore structure as between coarse and fine hole between the adsorption capacity was also between the thick, between the pore. Macroporous silica gel as catalyst support generally, matting agents, such as toothpaste abrasives. Should be chosen according to different purposes in different species
2, silicone safety
Main component is silica gel, chemically stable, not burn. Silica gel is an amorphous silicon dioxide, should control the dust in the workshop content is not greater than 10mg/m3, the need to enhance ventilation, wear a mask operation.
Silicone has a strong adsorption capacity, human skin can produce drying effect, therefore, the operation should wear good clothes. If the silica gel into the eyes, rinse with lots of water and seek medical treatment.
Blue silica gel as a small amount of cobalt chloride, toxic, should avoid contact and inhalation of food and mouth, such as the occurrence of poisoning should immediately seek medical treatment
3, silica gel storage and packaging
Silica gel has strong moisture absorption ability, and should therefore be stored in dry place, between the packaging and the ground should be shelf. Packaging with steel drums, drum, carton, plastic bottle, polyethylene plastic bag, flexible container bags, etc.. Category specific packaging requirements, see product description.
During transportation to avoid rain, moisture and sunlight.
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