OPP heat sealing film is a kind of polypropylene film, which is made by using heat sealing masterbatch on the surface and stretching it in two directions. Mainly used for heat sealing packaging of food and other electrical components. In contrast, the common OPP film is a widely used soft packaging material. It is colorless, odorless, tasteless and nontoxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The difference between OPP heat sealing film and ordinary OPP lies in the preparation process and application field. OPP heat-sealing film has good heat-sealing performance by using heat-sealing masterbatch and biaxial stretching, and is suitable for products that need heat-sealing packaging. Ordinary OPP film has not been processed by heat sealing masterbatch and biaxial stretching, and is more used in various flexible packaging fields, such as food packaging, drug packaging, daily necessities packaging and so on.