The thermoplastic resin molecular crystal size to points, can be divided into amorphous thermoplastic polymer and crystalline polymer types. Key Features Key features of plastics are: first, low density, high specific strength, you can get a higher yield of the packaging, namely "packaging unit mass or volume of the packaging size of the second area, most plastics and good chemical resistance. has good acid and alkali resistance, various types of organic solvents, long-term placement, oxidation does not occur. third, easy molding, molding the required energy consumption is lower than steel and other metal materials. fourth, good transparency, easy coloring fifth, with good strength, high-performance unit weight strength, impact resistance, easy modification. sixth, low processing costs. seventh, excellent insulation properties. modern Chinese packaging industry packaging industry since the reform and opening up policy to develop rapidly in the future to implement it. after three years of development, China's packaging industry has become a paper, plastic, metal, glass, packaging, printing and packaging machinery and equipment as the main industry of independence, integrity, wide range of industrial system and to Yangtze River Delta, Pearl River Delta, Bohai Bay for the cosmetics packaging industry structure in key areas. from the total amount of packaging industry, China is a big country package, but not the power package, the performance of independent innovation capability is still weak, the more value-added products low, the value of the package in the industry chain is not yet fully reflected. low-level redundant construction, resulting in low-end products, excess capacity and high-end products to highlight the problem of insufficient supply, lack of stamina development of China's packaging industry need to rely solely on the amount of growth, expanding capacity development, to relying on scientific and technological innovation, technological progress, optimize the structural adjustment up and enhance the core competitiveness of the industry development. 

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