Plastic packaging manufacturers plastic according to their own performance points can be divided into: blow molding processing can be repeated for many times to melt the molding process can basically maintain its characteristics and can only be carried out once the thermosetting plastic molding two categories. According to their use can be divided into the use of a wide range of cheap, good overall performance of the general plastics, such as PE, PP, PVC, PS, and amine plastic has good physical and mechanical strength, may replace the metal used in construction machinery Of the engineering plastics such as: ABS, nylon, polyester, POM, TPX-1, and so on. As well as in a particular performance with a particularly good class of engineering plastics, such as: has a particularly good radiation resistance, high temperature and other special plastics, such as: poly-sulfone, liquid crystal polymers. According to the molecular size of thermoplastic resin molecular points, can be divided into amorphous thermoplastic polymer and crystalline polymer two categories. The main characteristics of plastic The main features are: first, the density is small, high specific strength, you can get a higher packing yield, that is, "the quality of the packaging volume or packaging size." Second, most of the chemical resistance of plastic Third, the molding is easy, the required molding energy consumption is lower than iron and steel and other metal materials.Fourth, it has good transparency, anti-aging, anti-corrosion, anti-oxidation, anti- Easy to coloring. Fifth, with good strength, the unit weight of the strength of high-performance, impact resistance, easy to modify. Sixth, low processing costs. Seventh, the insulation excellent packaging industry in the synthesis, For the packaging industry, for this important part of the plastic packaging industry, plastic packaging is one of the four major packaging materials: paper and paperboard accounted for 30%, plastic accounted for 25%, 25% metal, glass accounted for 15%. The above two 25% fully illustrates the importance of plastic packaging industry.Although the plastic packaging industry is the second packaging material, its practical surface is not as good as paper and cardboard packaging.But the plastic packaging industry by 5% per year in the development rate, While other packaging materials, including paper and cardboard, metal, glass, ceramic, cotton and other only 2% of the rate of growth, for which the plastic packaging industry will be more than paper and cardboard and become the first packaging material. After 30 years of development, China's packaging industry has become an independent and complete industry with the major industries of paper, plastic, metal, glass, packaging, printing and packaging machinery and equipment as the main industry. The development of China's packaging industry has been rapid development since the implementation of reform and opening-up policy. , A wide range of industrial systems and to the Yangtze River Delta, Pearl River Delta, Bohai Bay as the focus area of the packaging industry.