The most popular green packaging industry at home

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Green packaging industry at home and abroad and its development ideas (II)

1. The status quo of green packaging industry at home and abroad and its comparison:

(1) paper packaging

paper packaging is an important part of packaging products, although it has a great impact on the environment in the manufacturing stage. However, in the construction of paper mills in developed countries, taking into account the investment in sewage treatment systems, their sewage has reached the national discharge standards. However, China is a large paper country in the world, and its output has ranked third in the world. However, most of the factories are small-scale factories, which cause great environmental pollution, especially in the Huaihe River Basin. Therefore, the country has closed most of the paper mills in the country in recent years and advocated the construction of large paper mills with a scale of more than 100000 tons, while the scale of paper-making enterprises in foreign developed countries is more than 100000 tons, and there are more 300000 tons of paper-making in the world

according to statistics in 1996, the world paper output was 281968 kilotons, including 81837 kilotons in the United States, 30013 kilotons in Japan and 26000 kilotons in China. The above three countries ranked among the top three in the world. The top three countries in pulp production: the United States 58234 kilotons, Canada 24352 kilotons and China 19000 kilotons. The per capita paper consumption ranks among the top three countries in the world: Finland 320.4 kg, the United States 319.5 kg, Belgium 258.1 kg, while China ranks behind the world 30

take the corrugated box industry with a large amount of paper as an example. In 1996, the total output of corrugated boxes in the world was 112624 million square meters, including 35134 million square meters in the United States, 13340 million square meters in Japan, 6669 million square meters in China (including Hong Kong) and 6264 million square meters in Germany. China (including Hong Kong) ranked third

the paper bag packaging industry in foreign economically developed countries is very developed. A large number of shopping bags circulating in the market are paper bags, but our paper bag industry is not developed enough. The shopping bags in the market are mainly plastic shopping bags. In recent years, paper shopping bags have developed, but there is still a considerable gap with the world level

cement packaging is a major producer of packaging products at home and abroad. Due to the lack of wood resources, the strength of using straw pulp paper as paper cement bag is not enough. Therefore, for more than a decade, we have vigorously promoted the method of replacing paper with plastic, making it difficult to dispose of a large number of waste woven bags, resulting in greater environmental pollution. In China, paper bags are mainly used for packaging

paper cups, paper trays and paper tableware are very popular in foreign countries and have a long history of development. Using these products to replace plastic and glass packaging products is the development direction of green packaging. Due to the late industrial development in this area, China has a large gap in terms of output, quality and variety. These gaps are mainly reflected in the paper and paperboard used in the production of these products. In order to quickly reduce this gap, Several large-scale functional special paperboard factories for food packaging should be built to meet the urgent needs of this aspect in China

small grain packages and food paper bags have been widely used in foreign developed countries since the 1970s, but they have been widely used in China only in recent years. 2) The first half of this view is theoretically untenable, which will play a great role in the sales and use of grain and food. Paper bags for small grain packaging and paper are now largely imported from abroad. In recent years, China has also established several small factories, but the output and quality are quite different from the world level

plant fiber fast-food lunch boxes (made of straw, wheat straw, bagasse, grain shell and other raw materials) have started rapidly in China in recent years. They are green packaging with Chinese characteristics and need the support of national policies and resources. Our research and development in this area is not far behind the world level

natural green materials are China's traditional packaging materials and another green packaging product with Chinese characteristics. Natural plants and mineral resources come from a wide range of sources and are easy to be recycled. They do not pollute the environment and are truly green packaging products. Although there are many advantages, plants carry plant germs, which is easy to cause foreign resistance in foreign trade. This is a major disadvantage that is not easy to overcome. Recently, the U.S. Customs raised a challenge against the wooden box packaging of machinery and equipment exported from China, affecting export trade. However, there is still a broad market for domestic use

honeycomb sandwich paperboard packaging boxes can mostly replace wooden boxes to make packaging boxes for heavier products. They can also be made into strong pallets and inner lining warm punching pads. They can be used as box making materials and have a wide range of applications. The range of weights that can be packed with honeycomb cartons ranges from tens of kilograms to thousands of kilograms

pulp molding products have been supported by the majority of environmental protection consumers since its birth, and its output is rising significantly. At present, the world's total output has reached about 600000 tons. China's pulp molding industry started late. Now it has introduced 10 production lines from Britain, France, Canada, Denmark and Japan, and developed more than a dozen large-scale lines and dozens of small-scale lines at home. However, there is still a big gap between its output and quality and the advanced level of foreign countries

(2) plastic packaging

the global total annual output of plastic is more than 100 million tons, of which 30% is used for packaging. China's plastic packaging products were 2.43 million tons in 1996. Plastic packaging materials are the varieties with the shortest service life among plastic products, generally 1-3 months, the longest year. Since then, most of them have been municipal solid waste (MSW) into the waste treatment system, and some have been discarded at will, becoming "white pollution", It was opposed by the government and the whole people

in order to solve the "white pollution", the packaging industry at home and abroad attaches great importance to it. It is proposed that various treatment schemes should be tested on the full section of steel, one of which is the development and production of degradable plastics

since the 1960s, people began to develop degradable plastics. After decades of efforts, two types of functional composite degradable plastics have been made in advanced industrialized countries

composite degradation is to add a certain amount of additives on the basis of current plastic resins. Product features: using additives as microbial culture agents to achieve degradable plastic products. However, the biggest drawback is that it still does not completely solve the fatal hazards such as "white pollution" and "soil desertification"

functional degradable plastics are divided into photodegradable and biodegradable types: photodegradable plastics use the sensitivity of this plastic polymer resin to light, absorb solar energy, and decompose into small molecules, so as to achieve degradation. At present, its fatal weakness is that organic substances are often non-toxic and tasteless when they exist as organic polymers, but once they are degraded into small molecular monomers, their toxicity, The harm to the natural environment cannot be ignored. This is actually one kind of pollution replacing another

another type is the functional ecological degradable plastic, which is a polymer synthesized from the secretion or things of bacteria and other microorganisms. As the raw material itself is the carbon source or energy source of microorganisms, it can be absorbed by these microorganisms in nature without causing any pollution, so it is a truly pollution-free degradable plastic. Foreign countries have begun to put such products on the market, but the technology and process in this regard are completely confidential and non transferable

as mentioned above, only modifying the existing plastics into additive degradable plastics can not fundamentally solve the serious environmental pollution. After decades of research, elimination and model selection in the world, the development direction of biodegradable degradable plastics with lactic acid or hydroxybutyric acid as raw materials has been determined. However, due to the high price of these two raw materials, industrial production cannot be realized for a considerable period of time. To realize the commercial production of the degradable plastics we select, we must first reduce the price of these raw materials

in recent years, due to the development of biotechnology, people can use genetic engineering to produce these raw materials on a large scale, so as to reduce the price of raw materials and realize the industrialized production of this fully degradable plastic

according to relevant information, Western Europe, North America, Japan, South Korea and other countries have developed the technology of small batch production of fully degradable plastics. For example, South Korea uses genetic engineering to produce fully degradable plastics. This kind of plastics has been used as disposable packaging bags and medical materials in Britain, Germany, Japan and other countries. However, because its price is 16-20 dollars per kilogram, which is 20 times more expensive than ordinary plastics, it cannot be widely used. At present, they use new methods to produce plastics, and the price can be reduced to $4 per kilogram, which is close to the level acceptable to the market. It is possible that after a few more years of efforts, it can be completely accepted by the market. Some domestic universities have already begun research and development in this field. Preliminary results have been achieved in the production of fully degradable plastics by bioengineering using high paying technologies such as radiation mutation and genetic engineering. If the state gives policy and financial support, it is entirely possible to provide the state with fully degradable plastics for agricultural film, packaging and food within five years

(3) metal packaging

metal packaging is a green packaging product that is easy to recycle and reuse resources

China's annual output in 1996 was 1.61 million tons, and its bulk product was 10million steel barrels with 200 vertical barrels. There are 14million cans in Japan, 5billion two-piece cans, about 100billion in the world, 3.5 billion three piece cans, 3billion canned metal cans and 4billion miscellaneous cans. The quality of 200 liter steel barrel is slightly lower than the world level. Although the size of the special sample used is very small, the quality difference of the 200 liter steel barrel is large. It is important to point out that the iron (steel) drawing tank has just started in China, and there is a big gap with the world level in terms of output and quality, so it should be vigorously developed. The application of coil sheet instead of sheet sheet sheet in the production technology of metal cutting should be quickly used to catch up with the international level

(4) glass packaging

high strength lightweight glass bottles have been comparatively manufactured and used in foreign developed countries, but China has only recently produced 330ml, 355ml lightweight beer bottles, which should catch up with the level of developed countries in the world as soon as possible

(to be continued)

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