Recycled plastic is a kind of waste plastic, which refers to plastics made from discarded products that have been used, eliminated or replaced, and washed and crushed. The recycling of plastics has been a very important direction of renewable resource research in recent years. Waste plastics, especially post-consumer waste plastics, are the focus of recycling. From the perspective of recycling methods and approaches, various latest recycling technologies and plastic cycle models related to waste plastics are explained, and then it is explained that actively studying new methods and new processes for recycling waste plastics is of great significance.

Introduction

Recycled plastic is a kind of waste plastic, which refers to plastics made from discarded products that have been used and eventually eliminated or replaced and washed and crushed in civil and industrial purposes.

Note: In a broad sense, recycled plastics refer to any reuse of scraps or discarded products, including pyrolysis to recover useful original chemicals. Recycled plastics can be re-added or no longer re-added with fillers, plasticizers, stabilizers, colorants, etc.

Generally speaking: thermoplastics can be recycled, but many plastic products are difficult to recycle because of surface treatment. At present, the most recycled products are limited to a few products such as plastic bottles and CDs.

The current situation and problems of waste plastic recycling

While plastic products bring convenience to human beings, they also bring great negative effects. With the substantial increase in the use of plastics, waste plastics are difficult to degrade naturally, and the environmental pollution caused by them is becoming more and more serious. Recycling has opened up a path of reduction, harmlessness and resource utilization for the treatment of waste plastic garbage. At present, all countries attach great importance to the recycling of waste plastics, invest a lot of manpower and material resources, and even pass legislation to develop various key technologies for the recycling of waste plastics. This paper reviews the current situation of waste plastic recycling and utilization, as well as the research progress and development trend of waste plastic treatment and recycling technology in China in recent years.

Plastic waste generation and recycling management countermeasures

Through on-site investigation and data survey, the flow direction and environmental characteristics of plastic packaging waste are analyzed, the basic characteristics and lessons learned from the recycling of plastic packaging waste are summarized, the characteristics of the recycling model of plastic packaging waste are discussed, the problems existing in the recycling process are deeply analyzed, and management countermeasures for strengthening the recycling of plastic packaging waste are proposed. The results show that plastic packaging is an important component of plastic products. Due to its light weight, large recycling volume and difficulty in recycling, China produces a large amount of plastic packaging waste every year. Urban domestic waste landfills have become the main destination and pollution source of plastic packaging waste. At present, China's plastic packaging waste recycling relies on individual recyclers who work in cities, which is in line with the current national conditions. The problem of plastic pollution cannot be solved in the short term. Long-term comprehensive management measures must be taken, such as source reduction, formulation of economic policies to encourage recycling, and appropriate harmless disposal methods.

The significance of recycling plastics

Due to the increasing use of plastics, waste plastics have caused serious environmental pollution, but at the same time contain important renewable resources. Recycled plastics are plastics in different forms that still have recycling value after their service life ends. Almost all thermoplastics have recycling value. Resources such as oil and coal are non-renewable and scarce, but waste plastics can be recycled, concentrated, classified, and disposed of scientifically and rationally to obtain renewable value and achieve recycling. Therefore, from the perspective of saving earth resources and protecting the earth's environment, the development and research of methods, technologies, and machinery for recycling waste plastics will become a focus in the future. At present, all countries attach great importance to the recycling of waste plastics and are committed to developing key technologies for the recycling of various waste plastics. Since the beginning of the 21st century, China's plastic recycling industry market has gradually prospered, small and medium-sized enterprises have emerged like springs, and investment has been active. It is developing into an environmentally friendly industrial economy with clustered recycling and processing, intensive market transactions, and driven entirely by market demand and prices.

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