The hottest biodegradable plastics need to be expa

2022-07-24
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Biodegradable plastics urgently need to expand production

after experiencing the pains of the initial stage of industry development, the biodegradable plastics industry has developed rapidly, and the production enterprises have begun to enter the profit stage from the production stage, preliminary sales stage, application and promotion stage. Recently, Xinfu Pharmaceutical Co., Ltd. completed the installation and commissioning of production equipment for the 3000 ton/a fully biodegradable new material (PBS) integrated process and complete production line project, and entered the trial production stage. The popularization and application of PBS will further enrich the application of biodegradable plastics, increase the selection of downstream manufacturers, and promote the development of the whole biodegradable plastics industry. The third quarter report of Zhejiang Hangzhou Xinfu Pharmaceutical Co., Ltd. (hereinafter referred to as Xinfu pharmaceutical) in 2007 shows that the company has completed the installation and commissioning of production equipment for the operating system analytical material (PBS) integrated process and complete production line project of the 3000 ton/a fully biodegradable new material torsion testing machine, and entered the trial production stage in October

jijunhui, chief engineer of National Engineering Center for engineering plastics, Institute of physical and chemical technology, Chinese Academy of Sciences, was relieved. At present, domestic PBS has an annual production capacity of 20000 tons, which proves that the road from laboratory to industrialization has been paved. Jijunhui said

pbs technology is mature.

it is understood that starch additive degradable plastics were popular throughout the country in the 1980s and 1990s. However, due to incomplete degradation and high product prices, they were not recognized by the market. Dozens of enterprises continued to stop production, resulting in a serious waste of investment. Since then, China's degradable plastics industry has begun to transform to fully biodegradable plastics

although there are many varieties in the market, the performance of biodegradable plastic products is still difficult to fully meet the needs of consumers. The mechanical and processing properties of each material only have outstanding characteristics in one aspect, and the comprehensive properties still have some shortcomings, which has become one of the bottlenecks restricting its market application and promotion

in addition to medical and high value-added materials, the current consumption of biodegradable plastics in bulk product markets such as disposable packaging film garbage bags, catering utensils and mulch films with large environmental load is not large

according to the current application research, there is no problem with disposable lunch boxes, shopping bags and packaging films made of PBS in China. In addition, PBS does not need to be recycled according to the basic principle of design. It can be completely degraded after being buried in the garbage for 3 months, which solves the problem of white pollution. Jijunhui said

it is understood that in addition to Xinfu pharmaceutical in China, only Mitsubishi Chemical and Showa polymer companies in Japan have started PBS industrial production in the world, with a scale of about 10000 tons. However, different from the domestic one-step polymerization method, the production of PBS in Japan adopts the chain extension method

just like rail production, PBS in China is a seamless rail, and PBS in Japan needs chain extender to connect sections of rail. Unlike domestic PBS, Japanese chain extenders may contain toxins, so some Japanese PBS varieties cannot be used on disposable tableware. Jijunhui explained this way

to be expanded

pbs will enrich the application of biodegradable plastics, increase the selection of downstream manufacturers, and promote the development of the whole biodegradable plastics industry. Wengyunxuan, Secretary General of the degradable plastics professional committee of China Plastics Association, said that in recent years, China's biodegradable plastics industry has developed rapidly. After experiencing the pain of the initial stage of industry development, biodegradable plastics manufacturers have begun to enter the profit-making stage from the production stage, the preliminary sales stage and the application and promotion stage. However, the insufficient supply of products has hindered the development, promotion and application of downstream industries

it is understood that in 2005, there were about 30 biodegradable plastic production enterprises, with a production capacity of 60000 tons/year, and the actual production was about 30000 tons/year. The domestic market demand is about 50000 tons/year. Recently, Beijing new materials development center revealed that at present, there are more than 200 biodegradable plastics production enterprises in China. In 2010, the capacity of biodegradable plastics in China will reach about 250000 tons

in addition, according to the data from the European bioplastic Association, the consumption of biodegradable products in the EU was 25000-30000 tons in 2003, and it is expected that the consumption of biodegradable plastics will reach 500000-1million tons in 2010

however, the total output of various biodegradable plastics in China, including PBS, PLA and PHA, is only tens of thousands of tons. Weng Yunxuan said that the shortage of raw materials will inevitably affect the development, promotion and application of downstream

in addition, Weng Yunxuan said that in recent years, Chinese consumers' awareness of healthy consumption has significantly improved, and biodegradable products are increasingly recognized by consumers

still need support

however, compared with ordinary polyethylene plastics, the price of PBS is still relatively high, which means that the cost problem will continue to affect the development of biodegradable plastics industry. Jijunhui said: according to the survey, compared with the existing plastic products, the PBS cost increases by no more than 20%, which is acceptable to consumers. If it exceeds 30%, there may be some obstacles

The main raw material of PBS is butanediol succinate. At present, the National Engineering Research Center for engineering plastics is studying the preparation of butanediol succinate from non food crops such as straw and corncob. Jijunhui said that the technology of preparing raw materials by fermentation is under pilot test, and the pilot test of preparing raw materials by hydrolysis has been successful. The industrialization of these technologies will reduce the price of PBS

in fact, the research level of biodegradable plastics in China is not worse than that in foreign countries, but there is a gap in application due to different consumption capacities. Jijunhui said that foreign consumers have a relatively strong ability to accept prices, so it is easier to promote biodegradable plastics than at home

in recent years, China has successively issued a number of policies to encourage the application and promotion of biodegradable plastics. In 2004, the National People's Congress passed the renewable energy law (Draft) and the solid waste law (Revised), encouraging the use of renewable biomass energy and the promotion and application of degradable plastics; In 2005, No. 40 document of the national development and Reform Commission clearly encouraged the use and promotion of biodegradable plastics; In 2006, the national development and Reform Commission launched a special fund project on promoting the development of biomass biodegradable materials; The definition, classification, marking and degradation performance requirements for degradable plastics implemented on January 1st, 2007 has been mutually recognized by Europe, the United States and Japan, providing convenience for Chinese enterprises to export products

however, China still lacks corresponding compulsory promotion measures. Weng Yunxuan said that at present, relevant laws and regulations abroad have forced some small plastic bags and disposable plastic products to use biodegradable materials. Weng Yunxuan suggested that China should also introduce relevant so-called subtraction laws and regulations to force the promotion and application of degradable materials. Some disposable non degradable packaging products made of traditional plastics, such as disposable garbage bags, shopping bags, external packaging of daily necessities, disposable tableware, disposable plastic cups, disposable food packaging containers, disposable food packaging films, disposable industrial packaging, etc., are appropriately restricted or even prohibited by stages and batches

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