Patents

The invention discloses a machine and a process for the continuous manufacturing of beta-form PVDF polymer film for piezoelectric applications. The machine consists in combination an extruder unit, a chill roll unit and a stretching machine. The extruder produces ±-form PVDF film from PVDF granules. The film is then taken out via chill roll unit to the stretching unit consisting of adjustable heating rollers and wind-up rollers to convert the ±-form to beta-form film. Machine of present invention is simple, flexible, portable and feasible considering the cost of production. The process of the present invention is continuous in operation and bulk amounts of ±-form PVDF film can be converted to -form.