PC/PET (Polycarbonate/Polyethylene Terephthalate) blended film for automobile interior and exterior accessories and preparation method thereof

The invention discloses a PC/PET blended film for automobile interior and exterior decorations, the PC/PET blended film sequentially comprises a bottom layer, a printing layer, a middle layer and a surface layer, the bottom layer adopts a PC and PCT blended modified material I added with a transesterification catalyst, the middle layer adopts a PC and PCT blended modified material II added with a polymer solubilizer, and the surface layer adopts a PC/PET blended modified material II added with a polymer solubilizer. The surface layer is made of a PC and PCT blended modified material III added with an ester exchange catalyst and a polymer solubilizer; and the modified material III comprises the following components in percentage by weight. The invention further provides a corresponding film preparation method and an automobile ornament part ins preparation method. In order to cope with injection molding impact resistance, printing protection and outer layer weather resistance, a multi-layer film structure of t