The early rubber was latex from plant such as rubber tree, rubber grass and the like, which was made of processed materials with elasticity, insulation, imperviousness and air. 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 all aspects of industry or life.
Silica gel: Silica (Silica gel; Silica) Alias: Silicate gel is a highly active adsorbent material, is an amorphous material, the chemical formula for the mSiO2 · nH2O; In addition to alkali, hydrofluoric acid does not occur with any substance Reaction, insoluble in water and any solvent, non-toxic and tasteless, chemically stable. 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 pore silica gel, B-type silica gel, pore silica gel