The hottest Olympic Games advocates environmental

  • Detail

The Olympic Games advocates environmental friendly degradable plastics to dissolve white garbage

for European and American manufacturers of degradable plastic products, Ningbo Tian'an biomaterials Co., Ltd. is a magical company. Such an ordinary enterprise can actually produce PHBV (polyhydroxybutyrate valerate), which is an indispensable raw material for degradable plastic manufacturers, and such an enterprise is actually in China, which really surprises them

domestically, not only the production technology of biodegradable plastics has reached the international level, but also the products of some domestic enterprises have successfully entered the international market. Weng Yunxuan, Secretary General of the degradable plastics professional committee of China Plastics Association, told China investment

white pollution

expedites the green revolution

the white pollution of waste plastics is becoming increasingly serious, and it is time to solve it. Countries, especially western Europe, the United States, Japan and other developed countries, restrict the use of disposable foamed plastic packaging. In recent years, the European Union has issued relevant regulations to restrict or prohibit the use of non degradable plastic packaging

the fundamental difference between biodegradable plastics and traditional petroleum based synthetic resins is that the main raw materials of biodegradable plastics are renewable resources such as starch and cellulose, which use sunlight and carbon dioxide as energy and carbon sources. They are high-tech materials that are transformed into polymers through biotechnology, and their products will be completely decomposed into carbon dioxide and water after being discarded. If recycled centrally for composting, organic manure can also be produced

with the emphasis on environmental protection, countries have begun to carry out the research and development of biodegradable materials. Similarly, as a large consumer of disposable plastic products, China has carried out the research and development of biodegradable materials since the 1980s

biodegradable plastics can be divided into natural biodegradable plastics, microbial biodegradable plastics and chemically synthesized biodegradable plastics

natural biodegradable plastics refer to a kind of materials that can be made into biodegradable plastic products through various molding processes with natural polymers as raw materials, including natural polymers such as starch, cellulose, chitin, soybean protein and their derivatives and mixtures. Among them, thermoplastic starch has been industrialized, and other natural materials are still in the basic research stage. At present, Wuhan Huali Environmental Protection Technology Co., Ltd. has achieved industrialization, and has formed a production scale of 10000 tons per year

biodegradable plastics synthesized by microorganisms include polylactic acid (PLA), polyhydroxyalkanoates (PHA), etc. PLA is synthesized from lactic acid fermented by molasses by direct condensation polymerization or ring opening polymerization of dimer lactide. At present, the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences and Zhejiang Haisheng biodegradable plastics Co., Ltd. are jointly conducting pilot research. The product performance basically reaches the product level of Cargill Dow company. At present, the construction of a demonstration production line with a production capacity of 5000 tons has been basically completed

the high price of biopolyesters synthesized by microorganisms is the main obstacle that is difficult to be widely used at present. Biodegradable plastics developed by chemical synthesis mainly include various aliphatic polyesters. The former mainly includes polycaprolactone (PCL), aliphatic polycarbonate (carbon dioxide and epoxy copolymer or carbon dioxide copolymer), etc. Inner Mongolia Mengxi high tech group uses chemical synthesis to produce degradable plastics. In addition, Henan Tianguan Group also uses carbon dioxide, a by-product of alcohol production, to produce fully degradable plastics. In addition, the chemical synthesis of polybutylene succinate by the Institute of physics and chemistry of the Chinese Academy of Sciences is also in the process of industrialization

in addition to the above three categories, there is another type of technology that blends natural resources such as starch with chemicals. Guangdong Zhaoqing Huafang Degradable Plastics Co., Ltd. has achieved the production of degradable plastics by plasticizing and modifying starch and blending it with polyvinyl alcohol

since 1999, we have been using renewable starch as raw material and fermentation engineering technology to produce new biomaterials, with a total investment of more than 70 million yuan, Liu Hui, manager of the marketing department of Ningbo Tian'an company, told China investment

the technical idea of Ningbo Tian'an is to take glucose extracted from starch as the carbon source, cultivate a certain microorganism in the fermentation tank, and then gradually synthesize PHBV in the body during its growth and metabolism. It is mainly used in the fields of food packaging and containers, shopping bags, toys and other daily necessities and packaging. It can also be used to produce disposable syringes, surgical clothes and other medical products. At present, Ningbo Tian'an is the only enterprise that realizes commercial and large-scale production of PHA materials

in 2004, we have formed a production scale with an annual output of 10million tons, and the production capacity will reach 2000 tons by the end of this year. Liu Hui is very proud of this

waste gas becomes higher and value-added plastics

the extensive application of plastic products causes white pollution, and excessive carbon dioxide emissions cause the greenhouse effect, which poses a great threat to the global climate and environment

for cement enterprises with large carbon dioxide emissions, under the heavy pressure of emission reduction, the most difficult problem for enterprises is how to reduce the carbon dioxide tail gas produced by cement kilns

considering the combination of white pollution and excessive carbon dioxide emissions, enterprises find the best way to improve the environment

In early July, a pilot production line with an annual output of 3000 tons of carbon dioxide based fully degradable plastics, which can not only solve the carbon dioxide emissions of enterprises, but also produce degradable plastics, was born in Inner Mongolia Mengxi high tech group company

as early as 2000, Inner Mongolia Mengxi high tech group company, in order to solve the carbon dioxide produced in the process of cement production, adopted the domestic leading pressure swing adsorption technology of Southwest Chemical Research and Design Institute to build a device for recovering and purifying 20000 ton food grade carbon dioxide from the waste gas at the end of cement kiln. However, at that time, most of the purified carbon dioxide was sold to food processing enterprises for fresh-keeping, corrosion prevention and other ways. The price per ton was about 800 yuan, and the economic benefit was not obvious

in the international market, the price of fully degradable plastic produced with carbon dioxide as raw material is about 20000 yuan per ton. It was this huge profit temptation that led Mengxi to invest more than 40 million yuan to cooperate with the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences to produce carbon dioxide based fully degradable plastics by using carbon dioxide from the tail gas of cement kilns as raw materials and using carbon dioxide and epoxides under the action of rare earth composite catalysts. In October, 2002, the world's first continuous and fully enclosed pilot production line with an annual output of 3000 tons of carbon dioxide based fully degradable plastics was built. The produced plastics are transparent, biodegradable, and only carbon dioxide and water are produced in the incineration process

however, due to policy, capital, technology and other reasons, for many years, only 700 tons of degradable plastic products produced by the pilot line have been sold. Xiang Hui, project manager of Mengxi high tech group, told China investment that it is light, durable and stable. Since then, in order to solve the problem of post-treatment, Mengxi invested 56 million yuan again at the end of 2005 to carry out industrial transformation

after more than five years of pilot test, the research in the laboratory finally blossomed. This pilot test result to solve the dual environmental pollution has finally realized industrialization. Mengxi can produce 3000 tons of carbon dioxide based fully degradable plastics every year by relying on the carbon dioxide produced by the cement enterprises affiliated to its group

carbon dioxide polymer has the characteristics of degradable (incinerable), transparent and high gas barrier, which is very suitable for disposable food and medical packaging materials. This technology has obtained 1 invention patent from the United States and 1 invention patent from Japan, and applied for 8 invention patents from China

can degradable plastics produced with carbon dioxide bring considerable profits to enterprises? If I had been asked this question earlier, I wouldn't dare to answer it, but now it has brought great inconvenience to people. I can say that such projects can achieve after tax cost recovery within 2 to 3 years, including the construction period, Xiang Hui said proudly

Weng Yunxuan also praised Mengxi's technology. Making fully degradable plastic from the waste gas carbon dioxide of the cement industry has extensive promotion value in domestic cement production enterprises. This technology can also be extended to key carbon dioxide emission enterprises such as oil refining, steel making, thermal power generation, chemical industry, etc., forming a unique industrial chain, which will play a certain role in mitigating the greenhouse effect

According to the data of the Degradable Plastics Association in the United States, Japan and Europe, the world demand for degradable plastics exceeded 500000 tons in 2005, and the next year will be a period of rapid development of degradable plastics. It is expected that by 2010, the world production capacity will be 800000 tons, and the demand will reach 1million tons

European and American companies started early, so they have formed a production scale of 10000 tons in terms of output. At present, the annual output of PLA series of nature works in the United States has reached 140000 tons, the industrialization scale of PBS (polybutylene succinate) of Showa polymer company in Japan has reached 1000 tons, and the production capacity of novonmont company in Italy reached 10000 tons in 2001. In addition, 2. According to the sensor classification of tensile testing machine, the current capacity of BASF in Germany has reached 14000 tons

it took us nearly 10 years for the national output to reach 50000 tons, Weng Yunxuan said

although the annual output value of domestic degradable plastic enterprises has reached 1billion yuan, some have achieved profits, and most enterprises are still in the investment stage

similarly, the investment of more than 70 million yuan in 8 years did not bring considerable profits to Ningbo Tian'an and recognition in the domestic market. For any enterprise, there is no user, which means there is no market, no profit space, and lack of production power. Due to the current production costs and imperfect environmental protection requirements, it is difficult to form large-scale sales of biodegradable plastics produced only through the efforts of enterprises or publicity by environmental protection organizations. Compared with developed countries, what the domestic market lacks is the support of corresponding laws and regulations, and Liu Hui is also very helpless. Like most other biodegradable plastic products manufacturers, products produced by Ningbo Tian'an are almost aimed at international customers

in China, compared with ordinary plastics, the production cost of biodegradable materials is 1 to 3 times that of ordinary plastics, so the price is still very high. Taking the most widely used lunch box as an example, the lunch box made of polystyrene material basically reaches 8 to 1 hair, while the current fully biodegradable starch based lunch box costs 1.8 to 2 hair, especially 2 to 3 hair. In addition, in the use of a very wide speed range and beam moving distance performance, some degradable materials are also slightly inferior. The containers made of them are soft, easy to shrink in case of high heat and high temperature, and easy to dissolve in case of water

due to high cost and lack of production experience, plastic manufacturers are unwilling to adopt this kind of polymer material. The lack of domestic market makes it impossible for enterprises to achieve mass production. Therefore, although international demand is growing at an annual rate of 30%, the capacity of domestic enterprises is far from meeting the demand

as one of the earliest enterprises engaged in the production of biodegradable plastics in China, Ningbo Tian'an once received support from government funds: 600000 yuan of scientific and technological innovation fund in 2000, 1million yuan as a 863 project unit during the Tenth Five Year Plan period, and a major 863 project unit during the Eleventh Five Year Plan period. The government's financial support has played a certain role in the development of enterprises

Copyright © 2011 JIN SHI