Views:190 Author:Site Editor Publish Time: 2020-08-24 Origin:Site
Generally speaking, silica gel can be divided into organic silica gel and inorganic silica gel according to its properties and components.
Inorganic silica gel is a kind of material with highly active adsorption Silica gel is an amorphous substance, and its chemical formula is MsiO2.NH2O. It is insoluble in water and any solvent, non-toxic and tasteless, and has stable chemical properties. In addition to strong alkali, hydrofluoric acid, it has no reaction with any other substance. Different types of silica gel have different microporous structures due to different manufacturing methods. The chemical composition and physical structure of silica gel separate it with other materials with many characteristics such as high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc. It is used at home as a desiccant, humidity control agent, deodorant, etc. It is used as oil and hydrocarbon decolorizer, catalyst carrier and pressure changing adsorbent in industry.
Organic silicone is a kind of organic silicon compound, which refers to the compound containing SI-C bond, with at least one organic group directly connected to silicon atoms. Traditionally, those compounds that connect organic groups to silicon atoms through oxygen, sulfur, nitrogen, etc., are also regarded as organic silicon compounds. Among them, polysiloxane with -Si-O-SI - as the skeleton is the most widely studied and applied organic silicon compound, accounting for more than 90% of the total amount.
Silica gel products can be divided into three categories according to the different molding process.
When the vulcanizing machine adds pressure on the high-temperature mold filled with solid silica gel raw materials mixed with vulcanizing agent, the molded silicone products is made. The hardness of molded silica gel is usually 30 -70 shores. According to the pantone color card number, you can get different color by mixing the pigment in certain proportion. The shape of the mold determines the shape of molded silicone products. Molded silicone products are currently the most widely used silicone products in the silica gel industry. It is mainly used for making silicone industrial accessories, silicone buttons, silicone gifts, silicone bracelets, silicone watches, silicone mobile phone covers, silicone kitchen utensils, silicone ice makers, silicone cake molds and so on.
Extruded silicone products are usually formed by extruding machine. Generally, extruded silica gel is long and tubular and can be cut at will. It is widely used in medical equipment and food machinery.
Liquid silicone products are soft and have the hardness of 10-40 shores. Due to its softness, it is widely used in making simulated human organs and medical silicone breast pad.
Special silicone products is highly heat-resistant, it can withstand 330 Celsius and is up to the food grade (fully in line with the FDA, LFGB standards), medical grade, and flame retardant grade.