Silicone basic knowledge

- Mar 06, 2018-

  Silicone inorganic silicone and silicone. Silicone rubber is a specialty rubber in synthetic rubber, which is divided into solid and liquid according to the form. Liquid vulcanization temperature is divided into room temperature curing and high temperature curing type.

  The main ingredient of inorganic silica is silica, an amorphous machine made from sodium silicate and sulfuric acid in silica. It is washed by minerals present in nature and processed into granules or beads.

  Its structure resembles a sponge body, which consists of interconnected pores that form a capillary adsorption system with a large surface area that adsorbs and holds moisture. At a humidity of 100% it adsorbs and condenses moisture equivalent to 40% of its own weight.

  As a desiccant, silica gel has an average pore size of 24 Angstroms (units of length), which absorbs moisture even at temperatures greater than 105 ° C. However, when the temperature exceeds 38 ° C, the hygroscopic speed of silica gel begins to decrease, and its optimum moisture absorption The state at 21 - 32 , even if the relative humidity higher 60% - 90%, but also to maintain the relative humidity within the container 40%.

  Due to its chemical safety, high safety, non-toxic and non-corrosive properties, Silica gel is approved by the U.S. FDA for use in the food and pharmaceutical industries. Silicone on the choice of a wide range of packages, generally OPP / PE, PET / PE film, non-woven fabrics, such as composite paper. The company is located in:

  [Silicone Features]

  Silica gel is a highly active adsorbent material, usually sodium silicate and sulfuric acid reaction, and aging, acid bubble and a series of post-processing process and prepared. Silica is an amorphous material, its chemical formula is mSiO2. nH2o. Do not dissolve in water and any solvent, non-toxic and tasteless, chemically stable, except alkali, hydrofluoric acid does not react with any substance. Various types of silica gel because of their different manufacturing methods and the formation of different porous structure. Silica gel chemical composition and physical structure, it has many other similar materials difficult to replace its characteristics: high adsorption, thermal stability, chemical stability, high mechanical strength and so on.

  Silica gel according to the size of its aperture is divided into: macroporous silica gel, coarse hole silica gel, B-type silica gel, pore silica gel. Due to the different pore structure, so their adsorption properties have their own characteristics. Rough silica gel in the case of high relative humidity have a higher adsorption capacity, pore silica gel in the case of lower relative humidity adsorption amount of coarse silica gel, and B-type silica gel because the pore structure between the coarse and fine Between the pores, the amount of adsorption is also between coarse, fine pores. Macroporous silica gel is generally used as a catalyst carrier, matting agent, toothpaste and other abrasives. Therefore, different varieties should be selected according to different purposes

  [Silicone safety performance]

  Silica gel is the main component of silicon dioxide, chemical stability, do not burn. Silica gel is an amorphous silica, should control the workshop dust content of not more than 10mg / m3, need to strengthen the exhaust, wear masks during operation.

  Silica gel has a strong adsorption capacity, the human skin can have a drying effect, therefore, the operation should wear good overalls. If the silica gel into the eyes, need plenty of water to wash, and find a doctor as soon as possible.

  Blue silicone because of containing a small amount of cobalt chloride, toxic, should avoid contact with food and inhalation of mouth, such as the occurrence of poisoning should find a doctor immediately

  [Silicone Storage and Packaging]

  Silica gel has a strong moisture absorption capacity, so it should be stored in a dry place, there should be shelves between the package and the ground. There are steel drums, paper drums, cardboard boxes, plastic bottles, polyethylene plastic composite bags, such as flexible container bags. Specific packaging specifications see product description.

  Avoid rain, moisture and exposure during transport.