Silica gel desiccant the Introduction silica gel desiccant is silica gel of the different varieties of water vapor permeability pouches, the main raw materials silica gel is a highly porous structure of the moisture content of silica, non-toxic, tasteless, odorless, chemically stable, with a strong absorption properties. Is a highly active adsorption material, the main component is silicon dioxide, is a highly active adsorption material. Using sodium silicate and sulfuric acid reaction, and the process of aging, acid bulbs and a series of post-processing system. Silica gel is amorphous material, the shape of a transparent irregular side of the sphere, chemical formula mSiO2. nH2O. Which is widely used for the storage and transportation of equipment, instruments, equipment, instruments, leather, luggage, footwear, textiles, food, medicines, etc. to control relative humidity of the environment, to prevent items from moisture, mildew and rust. Safety performance of silica gel silica gel has a strong adsorption capacity of human skin to produce dry, therefore, the operation should wear good clothes. If the silicone into the eyes, required copious amounts of water and seek medical treatment. Silica gel desiccant silica gel itself is a neutral substance, with strong alkalis, strong acids react under certain conditions, not to any other substances react. The use of desiccant, silica gel is the only U.S. FDA certification, direct contact with medicines, food. Silica gel desiccant, after eating, without tension. It will not cause harm to humans, will not be absorbed by the body. After the occurrence of eating, drinking some milk, so that the silica gel desiccant will soon be excreted with human feces. The quality indicators of quality indicators in line with HG/T2765-2005 unit adsorption capacity: the adsorption capacity of ≥ 10% RH = 40% RH = 20% ≥ 20% RH = 90%, ≥ 30% Note: GB10455-89 standard: RH class product First Grade = 90% qualified products ≥ 28% ≥ 29% ≥ 30% Packing specifications commonly used specification: 1g, 2g, 3g, 5g, 10g, 20g, 30g packaging materials: composite paper, nonwovens, composite non- textile fabric, DuPont paper, OPP film packaging: lined with plastic bag closed, the external use of corrugated boxes, each package comes with a humidity indicator card (RH10% ± 5%) use drugs, mechanical, optical electronics, precision instruments, meters, seed processed foods, tea, all kinds of chemical fiber, textile, leather shoes, leather, sports shoes as well as cultural archives, cameras, arts and crafts and other items needed moisture mildew, is widely used. Specify the following one, the silica gel desiccant can be used for bottled medicines, food, moisture. Ensure the content of dry goods, to prevent the growth of mold and all sorts of odd. 2, silica gel desiccant can be used as a general packaging desiccant. Such as bags, clothing, shoes, hats, leather, to prevent the goods in storage or during transport due to damp and affect product quality. 3, silica gel can be easily placed in the electronics, instrumentation, home appliances, machinery and equipment and other products, to prevent the goods due to damp and affect product quality. 4, silica gel desiccant can be placed within the shipping container to prevent the generation of container rain. 5, silica gel desiccant for moisture environment at room temperature (20 ~ 32 ° C), high temperature (60 ~ 90 ° C), which enables the relative humidity of the environment is reduced to about 40%, so the desiccant wide range of applications. Category 1, the pores of silica gel desiccant classified according to the nature of the raw materials: the appearance of the product was white, translucent vitreous. Mainly used for drying, moisture, can be used as a catalyst support, as well as organic compounds dehydration refined. Because of its high packing density and low humidity, moisture effect characteristics. Can be used as air purifying agent, to remove moisture from the air to control the air humidity. Also have wide application in the maritime, but also as a dehumidifier between the two layers parallel to the sealing glass, to maintain the transparency of the glass. 2, wide pore silica gel desiccant: The appearance of white, massive, spherical micro-spherical three categories. The moisture absorption effect is more pronounced under higher relative humidity environment. Commonly used to do the dehydrating agent and desiccant, catalyst supports, could get rid of organic acids and water in the transformer insulating oil. In addition because of its large aperture, or silicone deep processing of raw materials. 3, blue silica gel desiccant: The product is a high degree of pore structure. Blue, translucent, moisture its color from blue to light red, mix with the general pore silica gel indicator to indicate that the desiccant absorbent saturation level, mainly used for drying moisture. , No cobalt silica gel desiccant cobalt silica gel desiccant appearance of orange or translucent glass-like particles, has a strong absorption capacity and its appearance in the absorption process, the color will be obvious with the increase of moisture content The color change. Cobalt-free silica gel desiccant can be used alone but also with the pores of silica gel used in conjunction with (the proportion of 5% or higher). Was orange when not exposed to moisture, the moisture absorption after gradually become light green, continue to absorb moisture become dark green, you need to replace the use of silicone or renewable. Cobalt silica gel desiccant without cobalt chloride environment-friendly, blue silicone alternatives. Specification :1-3mm2-4mm2-5mm3-5mm4-8mm Packing: 20 or 25kg / bag Product Use, pharmaceutical, food standards of silica gel desiccant silica gel desiccant Food and Drug use is mainly to meet the State Food and Drug pharmaceutical packaging container (material) standard established by the Authority: medicinal solid bag mounted desiccant standard ", the standard specifies the requirements on the filter paper bag packaging of solid dosage forms pore spherical silica gel desiccant", which in addition to the desiccant bag appearance, strength, moisture content of the adsorbent, moisture absorption rate of the desiccant basic performance requirements, focusing on the desiccant in the content of harmful substances (such as: arsenic content, etc.), microbial limit, the decolorization performance requirements. 2, shoes, hats and shoes using silica gel desiccant silica gel desiccant can also be considered to be used for general cargo dry, moisture desiccant. The main requirement silica gel desiccant itself does not contain prohibited substances in the relevant international standards, the permeability of packaging materials and durable, while the adsorption effect of the above can not be achieved in other desiccant. 3, electronic products, electronic products with silica gel desiccant, especially moisture-sensitive electronic components packaging and humidity control also has a very high demand, the United States Association Connecting Electronics Industries (IPC) and the Joint Electronic Device Engineering Council (JEDEC) prepared jointly by moisture sensitive surface mount components, packaging and transportation to processing using the standard J-STD-033b is a comprehensive standard to be widely used in surface treatment, drying, drying and packaging requirements for moisture-sensitive electronic components. Chapter 3 of the standard specifies the requirements of the dry packaging of electronic components. Adsorption container, container with silica gel desiccant silica gel desiccant container is mainly used for shipping containers, used in maritime transport or storage process, the container because the experienced marine and humid climate and large diurnal temperature changes within the container The water vapor will condense into water droplets and the formation of the "container rain" in order to reduce the air moisture content within the container to prevent the generation of container rain. The recommended amount of normal humidity environment, it is recommended that a cubic amount of 500 grams, according to the level of ambient humidity, appropriate changes in the amount of silica gel desiccant in order to achieve better absorption effect. Storage conditions, temperature of 5-25 degrees, the humidity is lower than 70%; light or radiation, and so on; closed to save, not to direct contact and air; storage period of 10 years (ideally).