Plastic is the material that humans invented and fabricated to allow us to have a more comfortable life. In the past, we never know until the middle of the plastic of the 19th century, the original materials that humans seek out and use in daily life, in an earlier era are all natural materials, regardless of whether it is. Glass, paper, metal, wood, rubber or wool. These used to be the material needs of man. However, men are still trying to find the new materials are always used plastic as their hydrocarbon compounds with high molecular weight molecules composed of a repeating lengthy strings of molecules are carbon, hydrogen, and oxygen.