Resources and environment are serious problems facing the sustainable development of human beings in the 21st century, and biotechnology will become one of the key technologies to solve this problem. Among the many factors that cause environmental pollution, the pollution caused by plastic waste has aroused widespread concern in society.
At present, the main countries consuming degradation data in the world are the United States, Japan, Germany, Italy, Israel and Canada, and the types are photodegradation, photobiodegradation, disintegration biodegradation, complete biodegradation and so on.
Starch biodegradable granules refer to plastics that can be synthesized by microorganisms in the soil. With the help of bacteria or their hydrolytic enzymes, they can be synthesized into carbon dioxide, water and honeycomb-like porous materials and salts. They can be thoroughly synthesized after further microbial action and re-enter the biosphere. They are currently studied and developed by various countries. Hotspot. Therefore, biodegradable plastics generally refer to new plastics which have certain mechanical strength and can be synthesized by microorganisms such as bacteria, fungi and algae in the natural environment wholly or partially without forming environmental pollution. The mechanism of biodegradation is that bacteria or their hydrolases synthesize high molecular weight polymers into small molecular weight fragments, which are then further synthesized into carbon dioxide and water by bacteria.
With regard to biodegradable data, a variety of products have been developed and produced:
First, degradable resins and masterbatches include biodegradable resins, photobiodegradable masterbatches and composite degradable masterbatches.
Secondly, degradable plastic products include compost bags, waste bags, shopping bags, electronic packaging bags, plastic film, catering utensils, Golf tacks and foam materials.
Third, ordinary plastic products include shopping bags, waste bags and office supplies.
Biodegradable plastics are mainly used in agriculture, food packaging, degradable foam mesh and disposable fast food boxes in China.
Agricultural plastic film is one of the three pillars of agricultural consumption (fertilizer, pesticide, agricultural film), which is originally a country-controlled product and is constantly in demand in the market. Since 1979, the cultivation technology of agricultural film covering has been vigorously implemented in China. In 1980, the area of agricultural film covering was only 25,000 mu, and in 1992 it reached 50 million mu. The application of agricultural film ranges from cotton and vegetables to cash crops, such as peanut, melon and fruit, beet, sugarcane, tobacco, fruit and grain crops, rice, early rice, wheat and maize. Obvious economic benefits have been obtained from the implementation and improvement of agricultural film. According to statistics, the yield-increasing benefits of agricultural film from 1982 to 1987 are 7.1 billion yuan. From 1978 to 1989, the cumulative production of 28 billion kg of grain and economic crops increased by plastic film covering cultivation techniques. From the above statistics, we can see that the application of agricultural film has brought about a great deal. Significant economic benefits.
In a word, the most prominent advantage of degradable plastics is degradability and not polluting the environment. It is an inevitable trend to replace polyethylene and other plastics. It is imperative to upgrade plastic film products. According to the forecast, the current market scope reaches 30 billion yuan, and the annual growth rate is 30% - 50%.