Casing by the multi-layer polyimide film polyimide formed spiral wound, using a special glue. The material of the casing has a good electronic, physical and mechanical insulation. At very high and very low temperatures, the casing has a significant radiation resistance and flexibility.

　　Polyimide films can be, and other plastic film, paper or other materials mixed with spiral wound made products. When asked when the characteristics of a variety of materials, we can meet your requirements