The polymer film industry produces thin, flexible films from polymers such as PE and PP. These products are used in packaging, agriculture, medicine, and industrial applications. Raw materials are mixed with masterbatch and required additives and fed into the extruder, melted and mixed uniformly, and then discharged from the die. The film is cooled, stretched, and oriented if necessary to achieve the desired thickness and properties, and is ready for use after quality control and rolling.