The development of China's degradable plastics began in the mid-1970s, but it really developed in the 1990s. With the emphasis on environmental protection, the degradable plastics heat has risen in China. However, due to blind actions, the development of degradable plastics has been frustrated. However, at present, the development of degradable plastics has become more sensible. The relevant departments are considering resources, technology, economy, market, environmental protection and other aspects in a unified manner in consideration of the national conditions, researching new technologies, developing new and efficient degradation agents, and improving the time-control and rapid degradability. Fully degradable, actively researching scientific and reasonable test evaluation methods and standards.
At present, China's research and development of degradable plastics are photodegradation, light/biodegradation, photo/calcium carbonate degradation, light/oxygen/biodegradability (environmental degradation), complete biodegradation, and degradable biodegradation of plastics and high filling. Calcium carbonate environmental friendly materials. Among them, light/biodegradable and environmentally degradable plastic mulches have been listed in the national key scientific and technological projects for the “Eighth Five-Year Plan†and “Ninth Five-Year Planâ€; modified starch and its biodegradable functional masterbatch and products have been listed as industrialized by the State Planning Commission in 1999. Demonstration projects; Completely degradable plastics such as PH BV, PH AS, PLA, PCL, etc. are included in the national “9th and 5th†key scientific and technological research and 863 plans. In general, with the exception of synthetic photodegradation and completely biodegradable plastics, the research and development process of China's degradable plastics is in sync with the world, and its technological level is close to the world's advanced level.
According to incomplete statistics, there are currently more than 100 manufacturers engaged in degradable plastics in China, and a development system combining production, study and research has been formed. Nearly 100 twin-screw degradable masterbatch production lines have been built, with a production capacity of about 100,000 tons. Some companies have officially put into production or put into mass production, and the output is about 20,000 tons to 30,000 tons.
Among them, the starch-based biodegradation technology and eco-friendly product series developed by Tianjin Danhai Company not only have good biodegradability, but also can save oil resources, and can greatly reduce the amount of plastic waste generated, meet the principle of resource conservation and reduction, In addition, because its waste is conducive to composting and it meets the re-resource-based treatment measures, it has attracted attention from both home and abroad and its products are steadily entering domestic and foreign markets. In addition, Jilin Golden Eagle Industrial Degradable Plastics Co., Ltd., Ningxia Huaxi Degradable Resin Products Co., Ltd., and Fuzhou Normal University Environmental Research Institute have all developed very good technologies and materials, and have great development strength. China's fully biodegradable plastics have also made gratifying progress in recent years. Tsinghua University and Ningbo Biotechnology Co., Ltd. are currently conducting trials of production and product applications.
In China, the degradable plastics developed are mainly used in fields such as farmland, packaging, and consumer goods. The main products developed include plastic film, nursery bags, fertilizer bags, compost bags, packaging films (bags), food bags, supermarket shopping bags, and garbage. Bags, fast food dishes, beverage cups, tablecloths, gloves, golf clubs, etc.
At present, the degradable plastics film is in the demonstration application stage. The disposable packaging materials and daily sundries are being marketed in an orderly manner. Some of the master batches and products have entered the international market. The fully biodegradable plastic products in the pilot stage are also actively exploring the market in the fields of medical materials, high-grade packaging materials, and coating materials.