The hottest white crisis, why waste plastic recycl

Editor's note: recycling has become one of the key words widely concerned in China's plastic industry. Under the current conditions, it is also a great opportunity for the transformation of China's manufacturing industry. It is still an indisputable fact that most plastic varieties have low recycling technology and low degree of specialization. With the increasingly extensive application of plastics, plastic products have become an important part of people's lives. However, because waste plastics are difficult to degrade naturally and are not compatible with the natural environment, the environmental pollution caused by it is becoming more and more serious. It is reported that the world dumps a large amount of plastic garbage into the sea and rivers every year, which destroys the living environment of marine organisms and causes the death of marine organisms such as fish; In addition, a large amount of plastic waste is dispersed in the soil, which affects the permeability of the soil and is not conducive to crop growth; In particular, disposable packaging materials, including fast food boxes, garbage bags, food packaging bags and other waste, are known as "white pollution". In recent years, serious plastic pollution incidents in many cities have caused strong repercussions, and even aroused the "anti plastic" mood. Therefore, it is urgent to seek practical comprehensive prevention and control measures for waste plastics, and the key to solve this problem is how to treat and recycle them, and develop new environmentally friendly materials

in the global situation of increasingly pursuing circular economy, recycling is bound to become the primary joint of human engineering. As the two major materials in the packaging industry, the recycling and utilization of waste from paper and plastic will also become an important task under the condition of sustainable development. Therefore, on the premise of the recycling of waste paper in the previous issue, we will focus on the recycling and utilization of waste plastics and their "money path" in this issue

the potential "white" crisis of waste plastics

the rapid development of the plastic industry has also brought a series of social problems caused by waste plastics and waste plastics that people do not want to see. Plastic products have been widely used in every corner of society, from industrial production to basic necessities of life. People began to find that plastic waste had quietly rushed to us, seriously affecting our health and living environment. For example, some agricultural land began to reduce production due to the impact of waste plastic film, the "white pollution" caused by waste plastic began to give people a headache, the non rotting and non decomposing lunch boxes could not be effectively recycled, and there was no way to deal with domestic plastic waste, The sharp increase of plastic waste and the social and environmental problems caused by it are placed in front of people and in the place where people live and live all over the world

at present, the world is facing severe environmental problems, such as water pollution, depletion of the ozone layer, air pollution, waste of non renewable resources, and the excessive use of agricultural arable land caused by the continuous growth of the global population, which pose serious threats and challenges to the human living environment. In industrialized countries, the production and treatment management of municipal solid waste (MSW) are also regarded as an important part of environmental governance. With the continuous development of economy and the increasing improvement of people's living standards, MSW also grows rapidly. It is reported that the annual MSW produced in the United States is about 1, which promotes the high-quality development of the new material industry by 63000kt, and the per capita production is about 636kg, with good stability; EU Member States produce about 80000kt MSW each year (excluding commercial waste), 120000kt garbage is processed in Britain and 50000kt garbage is processed in Japan. The per capita waste emissions of various countries are between 400 and 600kg, such as 450kg in France. In China, only 136000kt of solid waste is cleared and transported in cities, and the per capita annual output of domestic waste is about 400kg

according to statistics, the annual output of urban domestic waste in China has reached more than 120 million tons, of which waste plastics account for 2% to 4%, that is, the total amount of waste plastics produced each year is about 2.4 million to 4.8 million tons. The increasing number of plastic wastes that cannot be naturally absorbed not only seriously affects and pollutes the environment, but also endangers human survival. Due to the lack of modern landfill or incineration facilities in many large and medium-sized cities in China, most waste plastics can only be stacked in the open air, coupled with people's random discarding, making the city surrounded by "white garbage"

Application of plastic waste

Application of recycled food plastic bags

review of recycling of plastic packaging materials in various countries

thinking and Countermeasures for urban plastic waste treatment (Part 1) (Part 2)

recycling of waste plastics

Plastic packaging materials have the advantages of light weight, high strength, good impact resistance, transparency, moisture resistance, beauty, stable chemical properties, good toughness and corrosion resistance, In the field of packaging, it has widely replaced a large number of metals, wood, paper, glass, leather, etc. Therefore, plastic packaging plays an irreplaceable role in reducing and thus amplifying the industrial linkage effect and lightening China's resource and energy pressure. However, plastic packaging materials have a fatal weakness, that is, their natural degradation time is long, some of which are more than 100 years. The non degradability of plastics leads to the long-term existence of its waste. Moreover, plastic packaging waste is often discarded once consumed, so plastic packaging waste has become an increasingly prominent environmental problem, forming the so-called "white pollution", causing great pressure on the human living environment. Therefore, the recycling of plastic packaging waste is imminent

(I) recycled plastic particles

raw material recycling refers to the recycling of plastic packaging materials. Material utilization this kind of raw material recycling technology and process only changes the shape and structure of the recycled plastic packaging, without changing its physical and chemical properties. For the raw material recycling of plastic packaging, the final result after technical and technological treatment is a kind of 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（