Plastics are made from synthetic or natural polymer resins. A class of materials with ductility at a certain temperature and pressure, which can be fixed after cooling. The process of natural or synthetic polymer molecules being in melt and uniformly distributed around them is called plasticization, which has been called plasticization, not yet achieved, and is considered not plasticized. Plastic packaging is one of the four major materials in the packaging industry: paper and paperboard 30%, plastic 25%, metal 25%, glass 15%