Cast film is a kind of non stretching and non oriented flat extruded film produced by melt salivation quenching. There are two ways: monolayer salivation and multi-layer co extrusion salivation. Compared with blown film, it is characterized by fast production speed, high output, excellent transparency, luster, thickness uniformity, etc.

As the film casting equipment is the follow-up process of flat extrusion film, such as printing and laminating, it is extremely convenient, so it is widely used in the packaging of food, medical supplies, textiles, flowers, and daily necessities. The production of salivating film in China started late (1980s), and the foundation is relatively weak, but the development speed is fast. After nearly 20 years of continuous development, salivating film has become a sunrise industry with considerable production capacity and level in the packaging industry in China