CPE casting film has high processing precision multi-layer co-extrusion CPE casting film extrusion technology is a kind of two or more different plastics using 2 or more extruders through a multi-channel composite die head, the confluence of the production of multi-layer composite film, and through the quenching roll molding technology. Multilayer coextruded casting film extrusion technology is also a traditional extrusion production process for film production. Using this method can produce a variety of films of different materials, and has a high processing accuracy, especially in the processing of semi-crystalline thermoplastics, this processing method can give full play to the properties of the processed material, while maintaining the best dimensional accuracy. The cast film has excellent optical properties and thickness uniformity, and high production speed can be obtained by using quench roll, and the morphology and structure of the film can be improved. CPE casting film and non-woven fabric, paper, aluminum film, Oxford cloth, microfiber cloth and other textile materials online thermal composite into synthetic materials. It can be used in car cover, disposable sanitary materials, medical supplies, luggage materials, clothing and footwear materials, etc. Multilayer coextruded casting film extrusion technology is a traditional film extrusion process. The biggest advantage of this process is that it has extremely high machining accuracy and can maximize the properties of the processed material. Especially in the processing of high barrier multilayer coextruded casting film, it has unparalleled advantages. The film made by the multi-layer co-extrusion process can make a variety of materials with different characteristics compound together in the extrusion process, so that the products have the excellent characteristics of different materials, and can be complementary in characteristics, so that the products get the performance and appearance of special requirements. Such as anti-oxygen and anti-moisture barrier, permeability, transparency, fragrance, heat preservation, UV protection, pollution resistance, high temperature cooking, low temperature heat sealing and strength, stiffness, hardness and other mechanical properties. With domestic and foreign market demand