White pollution is a unique environmental pollution in China's cities. A large number of discarded plastic products can be seen everywhere in various public places. They come from industry and are made by human beings. When they are finally attributed to nature, they are not easily absorbed by nature, thus affecting the ecological environment of nature.
From the perspective of resource conservation, plastic products should be recycled as much as possible because the main source of plastic products is the exhausted oil resources. However, at this stage, the production cost of recycling is much higher than the direct production cost, which is difficult to achieve under the current market economy conditions.
Faced with the increasingly serious problem of white pollution, people hope to find a plastic substitute that can replace the current plastic performance without causing white pollution. Degradable plastic came into being. This new type of functional plastic is characterized by degradation due to obvious changes in its chemical structure under specific environmental conditions after reaching a certain service life, Harmless or less harmful to the natural environment.
For example, starch filled plastic, first of all, the starch contained in it is rapidly decomposed by amylase secreted by microorganisms in the soil in a short time to form cavities, resulting in the decline of the mechanical properties of the film. At the same time, the self oxidant added in the formula reacts with metal salts in the soil to form peroxides, breaking the chain of polyethylene and degrading it into small fragments that are easy to be swallowed by microorganisms, which are absorbed by the natural environment, and plays the role of improving the soil at the same time.