Editor's note: Recycling has become one of the key words in the plastics industry in China. Under the current conditions, most plastic varieties have low recovery technology and low degree of specialization is still an indisputable fact. With the increasingly widespread application of plastics, plastic products have become an important part of people's lives. However, due to the fact that waste plastics are difficult to degrade naturally and are not affiliated with the natural environment, the environmental pollution caused by it is also becoming increasingly serious. According to reports, the world has dumped a large amount of plastic waste into the oceans and rivers each year, which has destroyed the living environment of marine life and caused the death of fish and other marine life. In addition, a large amount of plastic waste is dispersed in the soil and affects the permeability of the soil. It is conducive to crop growth; especially disposable packaging materials, including waste boxes, garbage bags, food packaging bags and other wastes, are called "white pollution." In recent years, serious plastic pollution incidents in many cities have caused people's strong reaction, even provoked the "anti-plastic" sentiment. Therefore, it is extremely urgent to seek a practical comprehensive prevention and control strategy for waste plastics. The key to solving this problem is how to handle and recycle it, and develop new environmentally friendly materials.
In the world where the circular economy is increasingly being pursued, recycling will inevitably become the chief joint of human engineering. As the two major materials for the packaging industry, paper and plastic, the recycling and utilization of waste will also become an important task under the conditions of sustainable development. Therefore, under the premise of the recycling of waste paper in the previous period, we will Concerned about the recycling and utilization of waste plastics, and its "pay-for-tunes" issue.
The "white" crisis lurking in plastic waste>>>> The rapid development of the plastics industry has also brought about a series of social problems caused by waste plastics and waste plastics that people do not want to see. The application of plastic products has been deeply rooted in every corner of the society. From industrial production to food, clothing and housing, plastic products are everywhere. People began to discover that plastic waste has come to us quietly, seriously affecting our physical health and living environment. For example, some agricultural lands have started to reduce production due to the effects of abandoned plastic film, and “white pollution†caused by waste plastics has started to cause headaches for people. The non-decomposable and undecomposable lunch boxes cannot be effectively recycled. The use of plastic waste cannot be dealt with.... The dramatic increase in plastic waste and the resulting social and environmental problems have been placed in front of people and placed in the lives of people around the world. The place.
At present, the world is facing severe environmental problems. Water pollution, consumption of the ozone layer, air pollution, waste of non-renewable resources, and the transitional use of agricultural land due to the continuous growth of the global population pose serious challenges to the human environment. Threats and challenges. In industrialized countries, the management of the production and treatment of municipal solid waste (MSW) is also seen as an important part of the governance of environmental issues. With the continuous development of the economy and the ever-increasing level of people's living standards, MSW has also grown rapidly. According to reports, the amount of MSW generated each year in the United States is about 163,000 kt, and the per capita amount is about 636 kg. The EU member states produce about 180,000 kt each year (excluding commercial waste). The annual waste handling capacity in the United Kingdom is 120,000 kt and Japan is 50,000 kt. Per capita garbage emissions in various countries range from 400 to 600 kg, for example, 450 kg in France. In China, only 136,000 kt of solid waste is removed from the city, and per capita annual production of live garbage is about 400 kg.
According to statistics, the annual domestic production of municipal solid waste in China has reached more than 120 million tons, of which waste plastics account for 2% to 4%, which means that the total amount of waste plastics produced each year is about 2.4 million to 4.8 million tons. The increasing number of these plastic wastes that cannot be naturally absorbed will not only seriously affect and pollute the environment, but will even endanger the survival of human beings. Due to the lack of modern landfill or incineration facilities in many of China's large and medium-sized cities, most of the waste plastics can only be stored in the open air. In addition, people are arbitrarily discarded and the city is surrounded by “white wasteâ€.
Plastic waste application issues
Recycling food plastic bag application issues
Review of recycling of plastic packaging materials in various countries
Thoughts and Countermeasures for the Disposal of Urban Plastic Waste ( I ) ( Part 2 )
Waste plastic recycling>>>> Plastic packaging materials have the advantages of light weight, high strength, good impact resistance, transparency, moisture resistance, aesthetics, stable chemical properties, good toughness, and corrosion resistance, and they have widely replaced a large amount of metals, wood, paper, glass, etc. in the packaging field. Leather, etc. Therefore, plastic packaging has played an irreplaceable role in alleviating China's resources and energy pressure. However, a deadly weakness of plastic packaging materials is that they are naturally degraded for longer periods, some for more than 100 years. The non-degradability of plastics leads to the long-term existence of waste. Moreover, they are often discarded after they are consumed. Therefore, plastic packaging waste has become a more and more prominent environmental issue. The so-called “white pollution†has formed, which has caused great pressure on the living environment of human beings. Therefore, plastic packaging waste has become Recycling is imminent.
(1) Recycled plastic particles Raw material recycling refers to recycling of plastic packaging materials. Materials using this raw material recycling technology and process only change the shape and structure of the recycled plastic package without changing its physical and chemical properties. For the raw material type recycling of plastic packaging, the final technology and process treatment result in a plastic raw material (recycled plastic particles) that can be reused to manufacture the same or similar packaging products.
Normal > Research on Recycling Technology of Plastic Packaging Materials (
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