Stretching‐Regulated Homogenization of Lamellae Thickness in Biaxially Oriented Polypropylene Capacitor Films, and Its Effect on Breakdown Strength

Stretching fields give rise to the formation of reinforcing crystals in biaxially oriented polypropylene capacitor films, endowing them with excellent electrical properties. In this paper, the correlation between stretching temperature, ratio, and annealing temperature and film structure as well as electric breakdown strength (E