Title:
CARBONACEOUS ACOUSTIC DIAPHRAGM AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/104003
Kind Code:
A1
Abstract:
Provided is a carbonaceous acoustic diaphragm that has sufficient mechanical strength and has excellent properties required of acoustic diaphragms. A starting material for amorphous carbon, such as a vinyl chloride resin or a furan resin, is mixed with carbon fibers having an average length of 10 μm to 10 mm. The mixture is molded into a flat shape with an extruder having a slit die to orient the carbon fibers in the extrusion direction. The molded object is burned and carbonized in a non-oxidizing atmosphere.
Inventors:
OONO TOSHIKI (JP)
SATAKE ATSUNORI (JP)
SATAKE ATSUNORI (JP)
Application Number:
PCT/JP2013/084463
Publication Date:
July 03, 2014
Filing Date:
December 24, 2013
Export Citation:
Assignee:
MITSUBISHI PENCIL CO (JP)
International Classes:
H04R7/02
Domestic Patent References:
| WO2010095351A1 | 2010-08-26 |
Foreign References:
| JPH04313997A | 1992-11-05 | |||
| JP2004032425A | 2004-01-29 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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