Research and development status of degradable plas

2022-08-09
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Research and development status of degradable plastics market in China

the research and development of Photodegradable Plastics in China began in the mid-1970s; In the 1980s, a few units carried out research on the first innovative instrument period for starch to overcome the "flow mark" filled collapsible biodegradable plastics; In the 1990s, with the increasing voice of environmental protection, the research on degradable plastics has mushroomed, and the development and production of degradable plastics has been set off many times. In recent years, after some regions in China experienced impetuous development and blind launch in the early 1990s, resulting in certain economic losses, the current development of degradable plastics has been more rational and calm, and is facing the reality. According to the national conditions, from the aspects of resources, technology, economy, market, environmental protection and so on, they are studying new technologies, developing new high-efficiency degradation promoters, and improving the time control, rapid degradation and complete degradation of degradation, Explore new uses, actively study scientific, reasonable and national test and evaluation methods and standards, and strive to further reduce costs

the varieties of degradable plastics researched and developed in China include photodegradation, photodegradation/biodegradation, photodegradation/calcium carbonate, photodegradation/oxygen/biodegradation (environmental degradation), complete biodegradation, disintegrating biodegradation and other plastics, as well as high filled calcium carbonate environmental materials. Among them, light/biodegradable plastics and environmentally degradable plastic mulching films have been listed in the national "Eighth Five Year Plan" and "Ninth Five Year Plan" key scientific and technological research plans; Modified starch and its biodegradable functional masterbatch and products were listed as industrial demonstration projects by the State Development Planning Commission in 1999; Fully degradable plastics, such as poly3 hydroxybutyrate and valerate copolymer (pH BV), polyhydroxyalkanoates (PHAs), polylactic acid (PLA) and polycaprolactone (PCL), have been listed in the national and local key scientific and technological research projects of the ninth five year plan and the "863" 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's advanced level

according to incomplete statistics, at present, there are more than 100 companies engaged in degradable plastics in China, and a development system combining production, learning and research has initially formed. Nearly 100 twin-screw degradation masterbatch production lines have been built, with a production capacity of about 100kt. Some enterprises such as Tianjin Danhai Co., Ltd., Jilin Jinying industry (degradable plastics) Co., Ltd., Nanjing sushi degradation resin Co., Ltd., Shenzhen lvwei Plastic Co., Ltd., Shenzhen deshili (China) Group Co., Ltd., Haikou Tianren degradation plastic Co., Ltd., Huizhou Huanmei degradation resin Co., Ltd Ningxia Huaxi degradable resin products Co., Ltd. has been officially put into production or batch production, with an output of about 20 ~ 30kt. Among them, the representative products are the starch based Biodegradation Technology and ecological utilization series products developed by Tianjin Danhai company, which have independent intellectual property rights. The content of biodegradable components such as film and modified starch can be as high as 51%, and the content of seedling pots and plastic injection products can be as high as 60% - 80%

this means that the products not only have good biodegradability, but also can save limited oil resources and greatly reduce the amount of plastic waste, which is in line with the principles of resource saving, starting from the source and reduction. In addition, due to the addition of a large number of starch and degradation promoting additives, its waste is conducive to composting treatment, which is a unique way of recycling, which is in line with the treatment of renewable resources. 5. LCP and other measures used in microwave oven containers have attracted great attention at home and abroad, and the products are steadily entering the domestic and international markets; Jilin Jinying Industrial (degradable plastics) Co., Ltd. and Ningxia Huaxi degradable resin products Co., Ltd. have the industrialized production technology to produce ultra-fine calcium carbonate in light/calcium degradable plastic film products, with the content of more than 51%; The degradable and incinerable plastic materials developed by the Environmental Materials Research Institute of Fuzhou normal university can not only promote biodegradation, but also reduce the amount of photosensitizer and cost by adding more than 30% of ultra-fine calcium carbonate with surface biological activation treatment, which is conducive to the comprehensive treatment of waste incineration and burial, and can achieve the purpose of reduction and resource saving. China's fully biodegradable plastics have made gratifying progress in recent years, among which Tsinghua University, Ningbo Biotechnology Co., Ltd., Hunan Zhongyu environmental protection materials industry Co., Ltd., Shantou Huayi Bioengineering Co., Ltd. are conducting pilot production and product application tests

at present, the application fields of degradable plastics in China are mainly agricultural, packaging and daily disposable consumer goods. The developed products mainly include mulching film, seedling bowl, fertilizer bag, compost bag, packaging film (bag), food bag, supermarket shopping bag, garbage bag, fast-food tableware, beverage cup, tablecloth, gloves, golf tee, etc. At present, degradable plastic mulch film is in the stage of demonstration application, 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 is in the pilot stage, and its products are actively exploring the market in medical materials, high-end packaging materials and dressings

in order to cooperate with the scientific development of degradable plastics, China is also actively studying and formulating test evaluation methods and standards. The degradable plastics research association, together with the Chinese Academy of Agricultural Sciences, Guangzhou Institute of synthetic materials, Shanghai Institute of organic Sciences, Shanghai Sanlin degradable resin products company, Fuzhou Normal University Institute of environmental materials and other units, has conducted soil and garbage landfill tests on 10 units of PE degradable plastic packaging film, degradable EPS lunch boxes and ordinary films and boxes in Beijing, Shanghai, Guangzhou, Fuzhou and other places, and has obtained many useful data. According to iso846, iso14851, iso14852, iso14855 and astm5338-92, the National Center for quality supervision and testing of plastic products and the Chinese Academy of Environmental Sciences conducted an experimental study on the biodegradability test evaluation method of degradable plastics in combination with national conditions. In 1999, the State Bureau of technology and Quality Supervision issued the national standards of general technical conditions for disposable degradable tableware (GB/t18006.1-99) and test methods for degradability of disposable degradable tableware (GB/t18006.2-99), and the China Light Industry Bureau issued the industry standard of degradable polyethylene film for packaging (QB/t2461-99), The China Environmental Labeling Certification Commission issued the technical requirements for degradable plastic packaging products (hjb012-2000) after revision, which played an important role in the promotion and application of degradable plastics

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