Automobile interior and exterior decoration film with multi-layer structure and preparation method of automobile interior and exterior decoration film

The invention relates to the technical field of interior and exterior trimming films, in particular to an automobile interior and exterior trimming film of a multi-layer structure and a preparation method thereof. The pattern layer is arranged in the film layer, the pattern layer is filled with the color units, and the injection molding pressure is adjusted in the injection molding process, so that the thickness of the color units is changed after the color units are extruded, and the color depth of the color units is changed; meanwhile, the curvature of the reflecting layer is changed due to different injection molding pressures, so that different colors are overlaid, and different visual effects are obtained; and the appearance of the ornament can be switched only by adjusting the injection molding pressure without replacing the type of the film. 本发明涉及内外饰薄膜技术领域，具体涉及一种多层结构的汽车内外饰薄膜及其制备方法；本发明通过在膜层内设置图案层，并在图案层内填充色彩单元，在注塑过程中通过调整注塑压力，使得色彩单元受到挤压后厚度发生变化，改变色彩单元的颜色深浅；同时不同的注塑压力使得反射层的曲率发生变化，进而叠加出不同的颜色，获得不同的视觉效果；使得无需更换薄