POLYCARBONATE RESIN FILM FOR SPEAKER DIAPHRAGM AND THE SPEAKER DIAPHRAGM

摘要

PROBLEM TO BE SOLVED: To provide a polycarbonate resin film for a speaker diaphragm with excellent heat resistance and excellent sound quality in high frequency and low frequency ranges. SOLUTION: This invention provides a polycarbonate resin film for a speaker diaphragm the surface roughness (Ra) of which is 0.05-5.0μm and the thickness of which is 10-100μm and provide the speaker diaphragm made of the film.