The thermoplastic starch masterbatch CM-300C exhibited by the company this time can be directly mixed with PBAT and PLA for film blowing, or extruded and regranulated. The addition amount can reach 40%, which can greatly reduce the cost of biodegradable bags. It is the best modified material for biodegradable polymers such as PBAT and PBS to increase the biocarbon content in the product. The products meet the requirements of domestic and foreign compostable plastic standards such as EN 13432, ASTM D6400, GB/T 20197, etc. Compared with the biodegradable products filled with inorganic minerals, the biodegradable bag produced by CM-300C have the advantages of small specific gravity, good performance and high grade. CM-300C can not only greatly reduce the cost of biodegradable polyester PBAT, PBS, PHA, etc., and help the implementation of the national plastic ban, but also increase the biocarbon content in the product and help achieve carbon peak carbon neutrality.