The silicone strap is very similar to the plastic strap, and sometimes it is referred to as a plastic strap. In the precise separation, with the finger of the band, if the appearance of white lines, is the silica gel strap.
Silica gel is a kind of high activity adsorption material, which is a amorphous substance. Its chemical molecular formula is mSiO2·nH2O, which is dehydrated and dehydrated by silicate gel. The main component is not SiO2. Insoluble in water and any solvent, non-toxic and tasteless, chemically stable, except strong alkali, hydrofluoric acid without any reaction with any matter. According to the size of the pore diameter, the silica gel is divided into: macroporous silicon, coarse pore silicone, type B silicone, and fine pore silicone. Various types of silica gel form different microporous structures due to different manufacturing methods. Silica gel is not silicone rubber, and silicone rubber is a synthetic rubber.
Plastic (American plastics industry association) : the definition of mainly composed of carbon, oxygen, hydrogen and nitrogen, and other organic or inorganic elements, the finished product is solid, is in the process of manufacturing the molten liquid, so it can record heat melting, add pressure to the flow, cooling solidification, and form various shapes, the vast and varied ethnic group called plastic material.