Rubber is a latex obtained from plants such as rubber tree and rubber grass, and is made of elastic, insulating, water-impermeable and air-permeable material after processing. High elasticity of the polymer compounds. Divided into two kinds of natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants made of plastic processed; synthetic rubber by a variety of monomers derived by polymerization. Rubber products are widely used in various aspects of industry or life.
Silica (Silica; Silica) Alias: Silicone rubber is a highly active adsorbent, is an amorphous material, the chemical formula for the mSiO2 · nH2O. Do not dissolve in water and any solvent, non-toxic and tasteless, chemically stable, except alkali, hydrofluoric acid does not react with any substance. Various types of silica gel because of their different manufacturing methods and the formation of different micro-porous structure. Silica gel chemical composition and physical structure, it has many other similar materials difficult to replace its characteristics: high adsorption, thermal stability, chemical stability, high mechanical strength and so on. Silica gel according to the size of its aperture is divided into: macroporous silica gel, coarse hole silica gel, B-type silica gel, pore silica gel.