| 摘要 |
PURPOSE:To continuously obtain a piezo electric and pyroelectric film having improved piezoelectricity and pyroelectricity and also having no wrinkles and strain by a method in which a polyvinylidene fluoride film is passed between paired heating rolls to which a voltage is applied for polarization and at the same time is monoaxially stretched. CONSTITUTION:A polyvinylidene fluoride film 13, for example, is passed between paired heating rolls 11 and 11' held with a fixed spacing and connected to a DC power source 15, where the film 13 is polarized by voltage applied between the rolls 11 and 11' and at the same time is monoaxially stretched according to the peripheral speed ratios of rotation between the rolls 11 and 11' and a winding rollers 14 in usual cases to obtain an aimed film. EFFECT:Operability is raised because the need for vapor deposition of aluminium, etc., prior to treatment, is eliminated. |
