The demand for biodegradable polymers is an important development trend related to the environment. Today, consumers tend to be interested in industrial development, CO2 emissions, and fossil fuel conservation. Some of the world's big brands like Walmart are shifting their use of plastic from petroleum to biodegradable plastic. The trend towards biodegradable polymers is benefiting from the narrowing of the price gap between petroleum-based polymers and biodegradable polymers over the past few years.