Title:
ACOUSTIC-INSTRUMENT DIAPHRAGM
Document Type and Number:
WIPO Patent Application WO/2012/060184
Kind Code:
A1
Abstract:
[Objective] To provide an acoustic-instrument diaphragm wherein all the higher harmonics distortions are reduced in the high-frequency range, while maintaining output in the high-frequency range to be a high sound-pressure. [Solution] The acoustic-instrument diaphragm has an upper layer and a lower layer, made of synthetic resin film, forming an intermediate layer, has the intermediate layer made of a nonwoven-fabric layer comprising synthetic resin nanofibers, and has these layers heating press-molded to adhere them with each other, to form an acoustic diaphragm with a prescribed shape. The synthetic resin film of the upper and lower layers is made of polyetherimide (PEI), and the synthetic resin nanofibers of the intermediate layer are made of polyetherimide (PEI) or polyethersulfone (PES).
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Inventors:
TAMARU MASARU (JP)
YAJIMA MITSUHARU (JP)
YAJIMA MITSUHARU (JP)
Application Number:
PCT/JP2011/073286
Publication Date:
May 10, 2012
Filing Date:
October 11, 2011
Export Citation:
Assignee:
NANO FACTORY JAPAN CO LTD (JP)
TAMARU MASARU (JP)
YAJIMA MITSUHARU (JP)
TAMARU MASARU (JP)
YAJIMA MITSUHARU (JP)
International Classes:
H04R7/02
Foreign References:
| JPH01270491A | 1989-10-27 | |||
| JP2010016455A | 2010-01-21 | |||
| JP2006295245A | 2006-10-26 | |||
| JP2005101889A | 2005-04-14 |
Attorney, Agent or Firm:
OHARA EIICHI (JP)
Obara Eiichi (JP)
Obara Eiichi (JP)
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Claims: