I became the second country in the world to mass produce corn plastics
After seven years of research, the Changchun Yingshe Institute of the Chinese Academy of Sciences and the Zhejiang Haizheng Group have built a large-scale, green degradable, environment-friendly polylactic acid resin industrial demonstration production line with an annual output of 5,000 tons, and achieved mass production. As of March 19, all performance indicators of the products obtained have fully or partially surpassed the level of similar products in the United States, and the devices have remained stable and can reach stable production. This indicates that following the United States, China has become the second country in the world with a polylactic acid industrialization scale of 5,000 tons or more, and its product quality ranks among the top in the world.
Polylactic acid resin, also known as corn plastic, is produced by natural fermentation of natural corn lactic acid, and then obtained through chemical synthesis. As corn plastics can solve the problem of white pollution and play an increasingly important role in saving non-renewable petroleum resources, it has been recognized by the world as a new type of ecological material for environmental protection and sustainable development in the new century, and it has become a competition for research and development across the world. Major issues.
China consumes more than 20 million tons of plastic each year, and it is also a big producer of corn. The Changchun Institute of Chemical Technology of the Chinese Academy of Sciences forward-lookingly recognized that accelerating the biodegradable PLA plastics research and development has great significance for economic and social development. They focused their research in this major direction from the late 1990s. In 2000, the institute carried out joint research with Zhejiang Haizheng Group, which has considerable strength in China, thereby speeding up the research and development of polylactic acid and its industrialization. During the development process, they made a breakthrough in realizing the localization of L-lactide needed for the synthesis of polylactic acid, and solved three bottleneck problems of increasing the yield, purification and polymerization of L-lactide to prepare polylactic acid. The domestic product with a melting point of 160-180°C, a glass transition temperature of 58-60°C, a tensile strength of more than 65 MPa, and a modulus of more than 3 GPa was obtained, and the product performance reached the advanced foreign standard for polylactic acid.
In the second half of 2000, they shifted the focus of their work to the research and development of polylactic acid industrialization. After nearly 7 years of research, it broke through the industrialization of key technologies such as lactic acid dehydration time, polylactic acid molecular weight distribution, cracking catalyst reaction conditions, monomer high temperature racemization, distillation and polymerization processes. At the end of 2007, they built the first core technology in China with independent intellectual property rights, core technology such as L-lactide cracking, L-lactide purification, green solvent-free bulk polymerization, and the second in the world with an annual output of 5,000 tons of green biodegradable and environmentally friendly Polylactic acid resin industrial demonstration line and achieve mass production. At present, the demonstration line polylactic acid yield is over 90% of the theoretical yield, and the produced polylactic acid has a number average molecular weight of more than 100,000, which fully meets the corporate standards.
After seven years of research, the Changchun Yingshe Institute of the Chinese Academy of Sciences and the Zhejiang Haizheng Group have built a large-scale, green degradable, environment-friendly polylactic acid resin industrial demonstration production line with an annual output of 5,000 tons, and achieved mass production. As of March 19, all performance indicators of the products obtained have fully or partially surpassed the level of similar products in the United States, and the devices have remained stable and can reach stable production. This indicates that following the United States, China has become the second country in the world with a polylactic acid industrialization scale of 5,000 tons or more, and its product quality ranks among the top in the world.
Polylactic acid resin, also known as corn plastic, is produced by natural fermentation of natural corn lactic acid, and then obtained through chemical synthesis. As corn plastics can solve the problem of white pollution and play an increasingly important role in saving non-renewable petroleum resources, it has been recognized by the world as a new type of ecological material for environmental protection and sustainable development in the new century, and it has become a competition for research and development across the world. Major issues.
China consumes more than 20 million tons of plastic each year, and it is also a big producer of corn. The Changchun Institute of Chemical Technology of the Chinese Academy of Sciences forward-lookingly recognized that accelerating the biodegradable PLA plastics research and development has great significance for economic and social development. They focused their research in this major direction from the late 1990s. In 2000, the institute carried out joint research with Zhejiang Haizheng Group, which has considerable strength in China, thereby speeding up the research and development of polylactic acid and its industrialization. During the development process, they made a breakthrough in realizing the localization of L-lactide needed for the synthesis of polylactic acid, and solved three bottleneck problems of increasing the yield, purification and polymerization of L-lactide to prepare polylactic acid. The domestic product with a melting point of 160-180°C, a glass transition temperature of 58-60°C, a tensile strength of more than 65 MPa, and a modulus of more than 3 GPa was obtained, and the product performance reached the advanced foreign standard for polylactic acid.
In the second half of 2000, they shifted the focus of their work to the research and development of polylactic acid industrialization. After nearly 7 years of research, it broke through the industrialization of key technologies such as lactic acid dehydration time, polylactic acid molecular weight distribution, cracking catalyst reaction conditions, monomer high temperature racemization, distillation and polymerization processes. At the end of 2007, they built the first core technology in China with independent intellectual property rights, core technology such as L-lactide cracking, L-lactide purification, green solvent-free bulk polymerization, and the second in the world with an annual output of 5,000 tons of green biodegradable and environmentally friendly Polylactic acid resin industrial demonstration line and achieve mass production. At present, the demonstration line polylactic acid yield is over 90% of the theoretical yield, and the produced polylactic acid has a number average molecular weight of more than 100,000, which fully meets the corporate standards.