The fluorinated polymers are widely appreciated for their remarkable chemical inertness and their excellent resistance to aging. Polyvinyldeneflouride offer the specific advantage of easy processing in accordances with all the conventional methods used in plastic industry. PVDF, polymerized according to its one special process, offers a high degree of crystallinity to that by other processes, resulting among other things in superior thermomechanical properties. The intrinsic technical superiority is one of the reasons for the success which PVDF has achieved on the world market for more then 30 years.