Since the 1930s, there have been technological explorations related to film coating. However, due to the limitations of film materials, coating processes and equipment in the early stages, they have not been able to adapt to production requirements, and the actual application has been limited. limit. In the 1950s, the American pharmaceutical company Abbott Lab first produced a new type of film tablet and patented it under the trademark "Filmtab". After nearly 40 years of research and development, continuous improvement and perfection of production equipment and processes, and the advent of polymer film materials, film coating technology has developed rapidly. Film coating has basically replaced sugar coating in foreign countries. Our country has only started to develop in recent years. The application trend of film coating based on foreign-funded drugs-new drugs-general medicines has developed rapidly and has become a "new hot spot" in the pharmaceutical industry.