With the rapid development of plastics industry technology, the current total output of plastics in the world has exceeded 150 million tons, its use has penetrated into all sectors of the national economy and people's lives in various fields, and has become the four pillar materials with steel, wood, cement. However, with the continuous increase in the output of plastics and the continuous expansion of use, the weight ratio of plastics in waste has reached more than 10%, and the volume ratio has reached about 30%. Their environmental pollution and damage to ecological balance have caused The society pays great attention. For this reason, efficient plastic recycling technology and research and development of degradable plastics have become important development strategies for the development of the plastics industry and the packaging industry, and have become the hot spots for research and development in the world.
Degradable plastics have similar or similar application performance and hygienic properties with common plastics before or during use, and they can be quickly degraded under natural environmental conditions and become easily accepted by the environment after they have been used. Fragments or chips, and further degrade over time into CO2 and water, eventually return to nature.
In general, biodegradable plastics can degrade into carbon dioxide and water in a relatively short period of time under certain environmental conditions, but the price is high, about 6 to 10 times that of ordinary plastics, and its use is greatly constrained. At present, besides medical and high value-added packaging materials, it is difficult for the market for large-scale products such as disposable packaging films (bags), garbage bags, food and beverage catering equipment, and plastic films, etc. that have a large impact on the environment. In order to overcome the problem of high prices and at the same time promote its products to enter the market as soon as possible, in recent years, Europe, the United States, Japan and other countries have tapped their potential in the original process to increase the raw material synthesis purity and product quality, and actively explore new uses such as civil engineering. We are using water-repellent sheets, aquaculture nets, magnetic cards for industrial and consumer use, and laminating with paper products, and are committed to accelerating the practical process. On the other hand, efforts are being made to develop natural materials and biodegradable plastics, common plastics to be filled, and new products blended. Although the application properties or degradation performance of these degraded plastics are affected to a certain extent, the performance-cost ratio of these degradable plastics is relatively suitable and can be easily introduced to the market. It is also conducive to reducing environmental pollution.
As we all know, plastics are light and have good overall performance. According to foreign research data from the entire life cycle analysis and evaluation of the product, compared with the current paper-based alternative products, plastics saves energy, saves resources, emits less waste gas, less wastewater, and has a lighter degree of pollution and waste generation during the production process. It also significantly reduces the advantages. Its only drawback is that it is not easy to degrade, but the development of plastic materials is only about 100 years old. Compared with the history of traditional materials for thousands of years and tens of thousands of years, it is not surprising that there are some shortcomings. A positive method should be taken to solve the problem, that is, the use of scientific and technological progress methods to solve, but should not be negatively prohibited, eliminated. The research and development of degradable plastics is a method that is based on scientific and technological advancement, giving it the characteristics of easier degradation and retaining its original excellent performance. It is a feasible method.
Degradable plastics, as high-tech products and environmentally-friendly products, are becoming the focus of research and development in the world today. Its development not only expanded the function of plastics, but also eased the environmental contradictions to a certain extent, and demonstrated the power and prospects of biotechnology and alloying technology in the field of plastic materials from synthetic technology. Therefore, the research, development and application of degradable plastics are of great significance both from the perspective of protecting the environment of the earth, or from inexhaustible renewable resources, or from the academic point of view of the synthesis of functional polymers.
Degradable plastic is an important development strategy for green packaging
March 31 11:07:12, 2024
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