Silicone rubber is a kind of highly active adsorption material, is an amorphous substance, insoluble in water and any solvent, non-toxic tasteless, stable chemical properties, in addition to strong alkali, hydrofluoric acid does not react with any substance. Silica gel products have cold resistance of -40 °, high temperature resistance of 240°; Soft and easy to fold; Can be recycled; Non-toxic tasteless environmental health; Easy to clean; Good elasticity, durability and other advantages. Int