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AssigneesSony Corporation, Dainippon Ink and Chemicals, Inc.
InventorsMasaru Uryu, Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi
Estimating the term…
A loudspeaker in which the input resistance is improved and the effect of humidity on the playback frequency response is suppressed, and a method for the preparation of the loudspeaker. A sheet-like product, containing glass particles with a particle size of 8 nm to 300 nm and polyamide resin, and prepared by application of a paper-making technique, is used as the diaphragm. The content of the glass particles in the compound material is 5 weight % to 70 weight %. In preparing the diaphragm, a phase of an aqueous solution containing diamine and water glass is contacted with a phase of an organic solution containing a dicarboxylic acid halide to generate a compound material containing glass particles and the polyamide resin. The compound material so prepared is formed into a sheet by a paper-making technique. In the process of the preparation by the paper-making technique, the compound material mixed with other fibrous material may also be used as a starting material.
A diaphragm for a loudspeaker comprising a compound material containing glass particles having a particle size of 8nm to 300 nm and a polyamide resin, said compound material being a sheet-like member formed by a paper-making technique.
A method for preparation of diaphragm for a loudspeaker comprising the steps of:
Dependencies are inferred from the claim text.