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What are the application of silica gel products factory in Dongguan?
Release time:
2019-05-30 12:30
Source:
DongguanSilicone ProductsWhat are the applications of factory silica gel?
Silica gel, also known as silicic acid gel, is a highly active adsorption material, which is an amorphous substance. Dongguan silica gel products factory is the main component of silica, chemical stability, not burning. Silica gel is environmentally friendly and non-toxic chemical synthetic material, excellent safety, and household food grade silica gel, can heat up to 200 ℃, low temperature can withstand to minus 20 ℃. And silica gel in recent years is also widely favored by designers, widely used in all walks of life, medical, factory, home and so on.
The raw materials of silica gel are divided into: ordinary industrial silica gel, food grade silica gel, platinum grade silica gel. Ordinary silica gel for the production of industrial accessories, such as miscellaneous parts, food grade silica gel for daily necessities such as small jewelry, platinum silica gel for the production of high-performance silicone products, platinum is a kind of curing agent to enhance the performance of a variety of products a catalyst. However, no matter ordinary or food grade silica gel, we can use it at ease. Silica gel is colorless and tasteless. Adding various colored gums and mixing them into various bright colors make us think it is poisonous!
Generally speaking, silica gel can be divided into organic silica gel and inorganic silica gel according to its properties and components. Inorganic silica gel: Inorganic silica gel can be used as a desiccant and can be reused. Silica gel is a porous substance with different particle sizes formed by proper dehydration of silicic acid gel mSiO2 · nH2O. It has an open porous structure, a large specific surface (surface area per unit mass), and can adsorb many substances. It is a good desiccant, adsorbent and catalyst carrier.

The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Add acid to the alkali metal silicate (such as sodium silicate) solution to acidify it, and then add a certain amount of electrolyte to stir, that is, to generate silicic acid gel; or add acid or ammonium salt to the concentrated sodium silicate solution can also generate silicic acid gel. The silicic acid gel is allowed to stand for several hours for aging, then the soluble salts are washed off with hot water, dried at 60-70°C and activated at about 300°C to obtain silica gel.
The silica gel is soaked in cobalt chloride solution and then dried and activated to obtain color-changing silica gel. It can also be used as a desiccant. When it is used as a desiccant, it is blue before absorbing water and turns red after absorbing water. From the change of color, we can see the degree of water absorption and whether it needs regeneration treatment. Silica gel is also widely used in steam recovery, petroleum refining and catalyst preparation. Silicone can also be used to make a mobile phone shell, with extremely high anti-fall and decorative.
Organic silica gel: 1. Molded silica gel products Molded silica gel products are usually molded by applying pressure through a vulcanizing machine after a high-temperature mold is put into a solid silica gel raw material with vulcanizing agent, and the high-temperature sulfur is solidified. The hardness of molded silica gel is usually 30°C-70°C. The color of the raw material mixed with the color paste is adjusted according to the Pantone color card number. The shape of the mold determines the shape of the molded silicone product. The molded silicone product is the most widely used one in the silicone industry.
Mainly used to do only silicone industrial accessories, keys, silicone pad, ice, cake mold and so on. Extruded silicone products; Extruded silicone products are usually extruded through the extruder silicone molding, generally extruded silicone shape is long, tubular can be cut at will, but the shape of extruded silicone has limitations, widely used in medical equipment, food machinery.
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