Silicone products (silica from synthesis of sodium silicate)
The processing works with silicone as the main raw materials are called silicone products. Silica gel is a porous substance with different particle sizes, which is formed by proper dehydration of silicic acid gel. It has an open porous structure, can adsorb many substances, and is a good desiccant, adsorbent and catalyst carrier. The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Adding acid to the alkali metal silicate (such as sodium silicate) solution to acidify it, and then adding a certain amount of electrolyte to stir, that is, to generate silicic acid gel; Or adding acid or ammonium salt to a concentrated sodium silicate solution can also produce silicic acid gel. Silica gel is left for a few hours to age, then washed with hot water to remove soluble salts, dried at 60 ~ 70 ° C and activated at about 300 ° C to obtain silica gel. Discolored silica gel can be obtained by soaking silica gel in cobalt chloride solution and then drying and activating it.
Food grade silicone is non-toxic and tasteless, insoluble in water and any solvent, and is a green product with high activity. Food grade silica gel has inherent thermal stability (-40℃-230℃). It is suitable for different occasions. The product has good softness to meet different needs。
Product characteristics
High temperature resistance: Suitable temperature range -40 to 230 degrees Celsius, can be used in microwave and oven.
Easy to clean: The silicone products produced by silicone can be recovered by rinsing with water after use, and can also be cleaned in the dishwasher.
Long life: the chemical properties of silicone material are very stable, and the products made have a longer life than other materials.
Soft and comfortable: Thanks to the softness of silicone material, cake mold products feel comfortable, very flexible, no deformation.
Variety of colors: According to the needs of customers, the deployment of different beautiful colors.
Environmental protection and non-toxic: from raw materials into the factory to finished products are not produced any toxic and harmful substances.
Electrical insulation properties: Silicone rubber has a high resistivity, and its resistance can remain stable over a wide temperature range and frequency range. At the same time, silica gel has good resistance to high voltage corona discharge and arc discharge, such as high voltage insulators, TV high voltage caps, electrical parts and so on.
Low temperature resistance: the minimum temperature critical point of ordinary rubber is -20 degrees to -30 degrees, but silicone rubber still has good elasticity when it is -60 degrees to -70 degrees, and some special formulas of silicone rubber can also withstand extremely low temperatures, such as low temperature seals.
Electrical conductivity: When adding conductive fillers (such as carbon black), silicone rubber has good electrical conductivity, such as keyboard conductive contact points, electric heating components, antistatic components, high voltage cable shielding, medical therapy conductive film, etc.
Weather resistance: Ordinary rubber rapidly degrades under the action of ozone generated by corona discharge, while silicone rubber is not affected by ozone, and for a long time in ultraviolet light and other climatic conditions, its physical properties have only minor changes, such as outdoor use of sealing materials.
Thermal conductivity: When adding some thermal conductive fillers, silicone rubber has good thermal conductivity, such as heat sink, thermal sealing pad, photocopier, fax machine thermal roller and so on.
Radiation resistance: The radiation resistance of silicone rubber containing phenyl is greatly improved, such as electrically insulated cables, connectors for nuclear power plants, etc.
