Method for producing a beta-type polyvinylidene fluoride membrane, beta-type polyvinylidene fluoride membrane, a manufacturing method of a piezoelectric sensor and piezoelectric sensors having a beta-type polyvinylidene fluoride membrane

摘要

PROBLEM TO BE SOLVED: To provide a production method of a β type polyvinylidene fluoride film that can be produced without requiring a large scale facility and by a simple method, in which a piezoelectric characteristic is excellent and purity is high; the β type polyvinylidene fluoride film; and a piezoelectric type sensor having the β type polyvinylidene fluoride film.;SOLUTION: A production method of a β type polyvinylidene fluoride film includes: a process in which polyvinylidene fluoride, a water-soluble polar solvent that dissolves the polyvinylidene fluoride and fixes to a β type, and an organic solvent in which a boiling point is lower than that of the water-soluble polar solvent are mixed to form a coating liquid; a process in which the obtained coating liquid is applied to a basal plate to form an application film; a process in which the application film is dehydrated; and a process in which the dehydrated film is water-washed.;COPYRIGHT: (C)2014,JPO&INPIT