Because the plastic melting point of this film is 160 ~ 200.
There are many kinds of materials that meet the requirements of FPC, and four of them are outstanding. However, due to the influence of performance, price, production technology, patents, ease of use and other factors, in the end, the polyimide (PI) "Kapton-H" developed by DuPont company dominated the world. According to statistics, it now accounts for 80% of the whole FPC material. PI, which scientists often say, refers to coating epoxy resin or acrylic adhesive on polyimide film to make copper clad laminate or covering film.