Classification of plastics
1- Natural
2-Semi-artificial
3- Synthetic or industrial plastics
In the case of natural plastics, we can refer to materials such as resins-biomin and resins. In the case of semi-synthetic plastics, we refer to a material such as gazine, whose main root is milk, which is used in the manufacture of “brush handles”, buttons And wood glue is used. ,
But the industrial plastics that have been widely used include many parts such as gears, telephone parts, whose main source is coal, among these materials are formaldehyde, urea, formaldehyde, and carbon fluorine. . ,
