1 Introduction
Using silica gel as the main raw material for processing works, are known as the silica gel products. Silica gel is a porous substance by silica gel inappropriate dehydrating into particles of different sizes. Porous structure withopen, can adsorb many substances, is a good desiccant, adsorbent and catalyst carrier. Silica gel adsorption is mainly physical adsorption, can berecycled and used repeatedly. In the alkali metal silicate (such as sodium silicate) solution with acid, the acid, electrolyte adding certain amount ofmixing, which generated silicic acid gel; or in the sodium silicate solution isthick with acid or ammonium salt can also generate silicate gel. The silica gelstationary for several hours so that the aging, and then wash with hot watersoluble salts, at 60 ～ 70 ℃ drying and at about 300 ℃ activation, then thesilica gel. The silicic acid gel soaked with cobalt chloride solution and then drying and activation, available silica gel.
Food grade silicone with non-toxic tasteless, insoluble in water and any solvent, is a green product with high activity. Food grade silicone has thermal stability of innate (-40 ℃ -230 ℃) suitable for different occasions. The producthas good flexibility, to meet the different needs
2 characteristics
High temperature resistant: applicable temperature range of -40 to 230 degrees Celsius, and can be used in microwave oven and the oven
Yi Qingxi: silica gel production of silicone products used in the rinse cleanafter recovery, can also be cleaned in the dishwasher
Long service life: the chemical properties of silica gel is stable, makeproducts, have a longer life expectancy than other materials
Soft: soft due to the silica gel material, cake mold products feel comfortable,flexible, no deformation
A variety of color: can according to customer needs, the deployment of adifferent beautiful colors
Non-toxic environmental protection: from raw materials to finished product shipments were does not produce any toxic and harmful substances
Electrical insulation: silicone rubber with high resistivity, and the resistance can be stable over a wide temperature range and frequency range. At the same time, silica gel has good resistance to high voltage discharge and arc discharge, such as high voltage insulator, high voltage electrical components,such as TV cap.
Low temperature resistance: ordinary rubber minimum temperature criticalpoint is -20 to -30 degrees, however, silicon rubber in the -60 degrees to -70 degrees still has good elasticity, silicone rubber and some special formula can also withstand the extremely low temperature, such as low temperature sealing ring.
Conductivity: when adding conductive fillers (such as carbon black), silicone rubber has good conductivity, such as keyboard conductive contact point,electric heating element, antistatic components, high voltage cable shielding,conductive film medical therapy.
Weatherability: ozone action of ordinary rubber produced in the corona discharge under the rapid degradation of silicone rubber, and is not affected by ozone, and for a long time in the ultraviolet and other weather conditions,its physical properties are only a small change, such as outdoor use sealingmaterials etc..
Thermal conductivity: when adding some conductive filler, silicone rubber hasgood thermal conductivity, such as radiator, heat seal, copier, fax machinethermal roll etc..
Anti radiation: containing phenyl silicone rubber radiation resistance is greatly improved, such as cable, connectors and other electrical insulation used in nuclear power plants.
