METHOD FOR FORMING COATING LAYERS OF THERMOPLASTIC POLYIMIDE

摘要

The present invention relates to a method for forming a coating film of thermoplastic polyimide on a thermosetting polyimide substrate film. Provided is a high heat-resistant polyimide film with high productivity and at low costs by preventing warpage phenomena or curl generation in a polyimide film while using coating equipment at low costs, by forming a thermoplastic polyimide coating film on both sides of a substrate film such as a thermosetting polyimide film and manufacturing a high heat-resistant polyimide film capable of heat fusing, instead of simultaneous multicasting a thermosetting polyimide layer and a thermoplastic polyimide layer.