Development status of degradable plastics in China

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The development of degradable plastics in China started in the mid-1970s, but it really developed in the 1990s. With people's attention to environmental protection, the popularity of degradable plastics rose in China. However, due to blind development, the development of degradable plastics was frustrated. However, at present, the development of degradable plastics has been more rational when the universal experimental machine has not done experiments for a long time. According to the national conditions, it is considering the resources, technology, economy, market, environmental protection and other aspects, studying new technologies, developing new high-efficiency degradants, improving time control, rapid degradation and complete degradation, and actively studying scientific and reasonable test evaluation methods and standards. I believe there will be greater development

at present, the varieties of degradable plastics researched and developed in China include light degradation, light/biodegradation, light/calcium carbonate degradation, light/oxygen/biodegradation (environmental degradation), complete biodegradation, disintegrating biodegradation and other plastics, as well as high filled calcium carbonate environmentally friendly materials. Among them, photo/biodegradable and environmentally degradable plastic films have been listed in the national "Eighth Five Year Plan" and "Ninth Five Year Plan" key scientific and technological research projects; Modified starch and its biodegradable functional masterbatch and products were listed as an industrial demonstration project by the State Development Planning Commission in 1999; Fully degradable plastics such as pH BV, pH as, PLA and PCL have been listed in the national key scientific and technological research and 863 plan of the ninth five year plan. In general, except for synthetic photodegradable and fully biodegradable plastics, the research and development process of degradable plastics in China is synchronized with the world, and the technical level is close to or equivalent to the world advanced level

according to incomplete statistics, at present, there are more than 100 manufacturers engaged in degradable plastics in China, and a development system combining production, study and research has been formed. Nearly 100 future production lines of twin-screw degradation masterbatch have been built, with a production capacity of about 100000 tons. Some enterprises have been officially put into production or put into batch production, with an output of about 20000-30000 tons. Among them, the starch based Biodegradation Technology and eco-friendly series products developed by Tianjin Danhai company not only have good biodegradation performance, but also can save oil resources, and can greatly reduce the amount of plastic waste, which is in line with the principle of resource saving and reduction. In addition, because their waste is conducive to composting treatment and in line with the treatment measures of recycling, they have attracted great attention at home and abroad, and the products are steadily entering the domestic and international markets. In addition, Jilin Jinying industrial Degradable Plastics Co., Ltd., Ningxia Huaxi degradable resin products Co., Ltd. and Fuzhou Normal University Environmental Research Institute have all developed 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 conducting production and product application tests

in China, the developed degradable plastics are mainly used in fields such as farmland, packaging, daily disposable consumer goods, etc. the main products developed include mulch film, seedling bowl, fertilizer bag, compost bag, packaging film (bag), food bag, supermarket shopping bag, garbage bag, fast food tableware, drinking cup, tablecloth, gloves, golf tee, etc. At present, degradable plastic mulch is in the demonstration application stage, disposable packaging materials and daily necessities are being orderly introduced to the market, and some masterbatches and products have entered the international market. Fully biodegradable plastic products in the pilot stage are also actively exploring the market in the fields of medical materials, high-grade packaging materials, dressings, etc. (medium package)

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