Polypropylene film (PP) is formed by pouring, blow molding or biaxial stretching from polypropylene resin. Electrical BOPP film requires high technique, with the niaturization and high performance of components, in addition to thinning the thickness of the film, the high dielectric strength, high winding resistance, a good uniformity of thickness is also
required. These put special requirements on production process, higher requirements on equipment technology, process technology and production operators, it requires mature experience as well.