Since the beginning of the 21st century, the protection of the global environment, the construction of a resource-recycling society, and the road to sustainable development have become hot spots and urgent tasks in the world. Biodegradable plastics have been identified as environmentally low-load materials through the analysis of the product's entire life cycle. In addition, the main raw material of a considerable part of biodegradable plastics comes from agricultural resources that can be regenerated year after year. It has also become a globally recognized development trend as a complementary, non-renewable petroleum resource that is increasingly depleting and increasingly depleted. Therefore, biodegradable plastic has become a global research and development hotspot.
I. Overview of biodegradable plastic R&D production and application
In recent years, biodegradable plastics in several developed countries in the world have made great progress. There are data reports that biodegradable plastics in the world amounted to 35kt to 40kt in 2000. In 2001, the Polylactic acid (PLA) production line of 140kg from Ergill-Dow was built in the United States. Starting, the world's biodegradable plastic production will further increase. It is predicted that by 2010, a market scale of 100 kt will be formed. After 2015, the consumption of degradable plastics will account for 10% of the total plastic market. According to another report, the current annual sales volume of biodegradable plastics in North America is estimated to be 12.5 kt, and it is expected to increase to 17.5 kt by 2005, with an average annual growth rate of 7%. Among them, polylactic acid is the mainstay, and the annual demand will reach 12.5 kt.
The main market for biodegradable plastics in North America is bulk packaging materials. In 2000, the sales volume was 10 kt. By 2005, its annual average demand is expected to increase by 4.6 percent. The second largest market is compost bags. The sales volume will increase from 2.5 kt in 2000 to 4 kt in 2005, with an average annual growth rate. 9.9%; other markets are agricultural plastic film, hygiene products and coating materials, etc. The current market demand is less than 0.5kt, and it is expected to increase to more than 1kt by 2005.
Table 1 Overview of R&D and production of biodegradable plastics in several major countries in the world
Normal align=center> Production
Normal align=center> Country
Normal align=center> Production company
Normal align=center> Main ingredients
Normal align=center> product name
Normal align=center> Productivity
Normal align=center> (t / year)
Normal align=center> Category
Normal align=center> United States
Normal align=center> NOVON
Normal align=center> International
Normal align=center > Thermoplastic Starch
Normal align=center> modified starch /PE
Normal align=center> NOVON
Normal align=center> Degranovon
Normal align=center> 45 , 000
Normal align=center> Starch base
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