How is polyimide film made?
There are many places where polyimide film can be used. Therefore, more and more customers pay attention to this product. Many customers and friends want to figure out how the polyimide film is made. Below, professional manufacturers have made a detailed introduction, let’s take a detailed look together.
The film preparation method is as follows: cast a polyamic acid solution into a film, stretch and imidize it at high temperature. The film is yellow and transparent, with a relative density of 1.39 ~ 1.45. It has excellent high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation properties, and can be used for a long time in the air at 250 ~ 280 ℃. The glass transition temperatures are above 280°C (Upilex R), 385°C (Kapton) and 500°C (Upilex S). The tensile strength is 200 MPa at 20°C and over 100 MPa at 200°C. It is particularly suitable for use as substrates and insulating materials for flexible printed circuit boards of various high-temperature resistant motors and electrical appliances.