DIAPHRAGM FOR SPEAKER

摘要

PROBLEM TO BE SOLVED: To improve the acoustic characteristic of a diaphragm by filling and blending mica as reinforcement material into a pholyolefin group matrix resin and to enhance the decorative design by providing the diaphragm with a bright color having pearl gloss. SOLUTION: The material consisting of 50-80wt.% of a polyolefin group matrix resin and 20-50wt.% of flaky mica 1 whose average aspect ratio is >=10 while including at least >=3wt.% of pearl mica 1' is injection-molded so that the flaky mica are oriented in parallel in the polyolefin group matrix resin 5.