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2 Inventor name 'Blas also IiV (1 other person) 3 Patent applicant address Osaka Prefecture
Kadoma city Oza Kadoshin Address 10 p6 Name (582) Matsushita Electric Industrial Co., Ltd.
Representative Matsushita Shoji 4 agent 〒 571 Osaka Prefecture Kadoma city Oja Kadoma
address 1006 [Face] Japan Patent Office ■ Japanese Patent Application Laid-Open No. 501583220 published date 2. Aki 50. (1975) 12.22 ■ Japanese Patent Application No. 4 '? -6639
et al. [Phase] Application date A / S, (197) /, / 審査 examination request (all three pages) Office
internal reference number 6! 6555 specification 1, title of the invention
Vibration for acoustic equipment, moving plate
3. Detailed Description of the Invention The present invention relates to a diaphragm used for a
speaker at the time of audio equipment, which provides a high-elasticity, high specific elastic
modulus, and a suitable pressure plate for sound equipment having a suitable internal loss. It is.
Heretofore, as the speaker diaphragm, a sheet made of pulp or other natural fiber material is
used in a large amount, for example, a foamed glass, an organic resin film, a gold J14 foil or the
like is used. In general, the paper-like diaphragm has a drawback that the Il # i sound resonance
frequency appears low because the specific elastic modulus (elasticity 4 / can degree) of the
paper-like diaphragm is small as its material physical property. The present invention is intended
to eliminate the above-mentioned conventional drawbacks, and to increase the roaring resonance
frequency by using an aromatic polyamide fiber having high strength and a high elastic modulus
than conventional pulp and other naturally occurring miscellaneous substances. It is. The
vibration plate of the present invention has a basic molecular structure [Bi-R1-NH--R2 ---], where
R1 and R2 are as follows: EndPage: 1 These polymers are spun to form fibers And cut to a
suitable length, for example 6 to 20 sll, to form a sheet, and as a result of defining the
characteristics of the molding, it has been found that it has a much higher specific modulus than
pulp and synthetic resin products The Hereinafter, the description will be further clarified with
the examples. [Example 1] Poly-P-7 which is an aromatic polyamide = = Polyamide used to cut
5116 IC of a fiber with a fiber diameter of 11μ which is spun lentilephthalamide and to improve
the dispersion of the fiber in water Ethylene oxide (molecular weight: 460,000) is mixed with
water containing 0.01 wt-%, and stirring is carried out for about 1 hour by means of a propeller
stirrer to perform papermaking. After drying the sheet-like mat-like material, it is impregnated
with an epoxy resin which is a binder, a mixture of 20 phr of trifluoride dibasic monoethylamine
complex salt with a curing agent in 7 tons of a resin and dissolved, Dry at 80 ° C for 1- on. It is
cured by a heat press at 160 ° C. for 2 hours to obtain a molded product. Is the molding
pressure 1 o O? / Rxi [Example 2] A plain weave cloth woven with aromatic polyamide fibers is
impregnated with a varnish obtained by diluting a phenol resin 1004 with a methanol resin, and
then dried at 100 ° C. for 6 minutes to obtain gold. The mold was cured at 120 to 130 T for 30
minutes, and cured at 180 to 170'C for 1 70 to 90 minutes to obtain a molded product. The
molding pressure is 6 to 10 KpA The results of measuring the physical properties of the molded
articles prepared according to Example 1 and Example 2 by the imaging lead method are shown
in the following table together with the conventional example.
The diaphragm for audio equipment of the present invention has the above-mentioned
configuration, and according to the present invention, the specific elastic modulus and internal
loss are larger than those of the paper / polyester film, and hence the M [number characteristic is
excellent. Therefore, a faithful reproduction of the blue tatami is obtained. ; Other than the above
mentioned originator and agent (2) Agent address Osaka Prefecture Kadoma city Ogata Kadoma
1006 Matsushita Electric Industrial Co., Ltd. Name (6152) Patent Attorney Shigetaka Kuwano
EndPage: 2 Procedure Amendment Showa Date 052211 ′ ′ Director General of the Agency
Agency 2 Name of the Invention 2 Name of the Invention S Motion Board for the Audio
Equipment Person who does 3-sleeve Correction: 1 ′ 1 To · · · j River 7, 11 出 願 applicant I;
place in Kadoma city Ogata Kadoma 1006 address name 4 '1 · (582) Matsushita Electric
Industrial Co., Ltd. Deno, Masaharu Matsushita 4 agent 〒 571 address Osaka Prefecture Kadoma
City Oji Kadoma 1006 Matsushita Electric Industrial Co., Ltd. 5, the correction target '6, the
correction 6 answers 4 tP soph 6 true surface down correction 0EndPage: 3
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