Title:
DIAPHRAGM FOR SPEAKER
Document Type and Number:
Japanese Patent JP3721478
Kind Code:
B2
Abstract:
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.
Inventors:
Fumiki Shingu
Kiyotaka Miyashita
Koichi Ogawa
Kyo Akira
Kimura morning
Kiyotaka Miyashita
Koichi Ogawa
Kyo Akira
Kimura morning
Application Number:
JP11554396A
Publication Date:
November 30, 2005
Filing Date:
April 12, 1996
Export Citation:
Assignee:
Forster Electric Co., Ltd.
Nippon Koken Kogyo Co., Ltd.
SHISEIDO COMPANY,LTD.
Nippon Koken Kogyo Co., Ltd.
SHISEIDO COMPANY,LTD.
International Classes:
B29C45/00; C08K3/34; C08K7/00; C08K9/00; C08K9/02; C08L21/00; C08L23/00; H04R7/00; H04R7/02; (IPC1-7): H04R7/02
Domestic Patent References:
| JP1140897A | ||||
| JP3004698A | ||||
| JP3092099A | ||||
| JP3146561A | ||||
| JP4268380A | ||||
| JP5140475A |
Attorney, Agent or Firm:
Hiroto Kai
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