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JPS5338319

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DESCRIPTION JPS5338319
Akira book 1, the name of the invention
Shooting board for speaker
5. Detailed Description of the Invention The present invention relates to a diaphragm for a high
fidelity reproduction speaker having a large V, in particular, a Young's modulus and an internal
loss n in a jl IJ plate for a speaker. In general, the physical properties required for the material of
the speaker diaphragm are:-Young's modulus (thick gradient-small density, (8) internal loss
moderately thick-physical, chemical Can be cited as stable. In history, the speaker O sex, 4 Cth
will be Jl 'J! The sound pressure frequency-, the flatness of the characteristics, and the efficiency
thereof can be raised in the field where the characteristics are considered. The reproduction limit
of this sound pressure frequency characteristic is the low frequency resonance frequency. It is
decided by the high region resonance frequency. Does this low frequency # vibration frequency,
the number reduce the stiffness of the diaphragm support? It can be lowered if the heavy
diaphragm is used conveniently, but one! Weighting the jilll board also limits the low sound
output level T, so the weight of the swing #Ii: is limited. Also, in order to increase the
reproduction level in the low range, it is necessary to increase the effective aperture of the
speaker, so that the single pitch of the 91-m moving plate is small-it is desirable that it is 1t, the
high-resonance frequency is The value is proportional to the Young's modulus and the thickness
of the diaphragm, and the vibration 1111 having a large Young's modulus has a height i value.
Within 1 sf III loss is to recommend the size of the congruence of the diaphragm, affecting the
sound pressure frequency a # peak of the nature of the nature, and its characteristics are flat, for
a large O conventional O speaker The vibration plate is made of wood pulp EX natural oil, mixed
with bast and sister dirt, or chemical fiber, appropriately beaten, dispersed in water, formed into
paper, and the following 19 formed stone. This cocoon is processed into beating, pressure
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EndPage: 1 crush, fibrillation takes place, and it is formed on paper by inter-fiber vh-hydrogen
bond stop and post-treated by compensation 'a etc. . This f LI LIlt conventional diaphragm made
of this work is made up of natural 4 types, and there are many variations in the characteristics
between a and b, making it very difficult to adjust to the desired threshold value. '0 IJ loadability
of this conventional diaphragm is as follows: Young's modulus-0, 6 to 1.5 x 10 dy /-/ C 1 ft,
storage tO 03 to' 0.7 p / em; v within 5 fj I loss-0, 02- 0, O5 sound propagation speed l-1, 22x'10'as / most meet G, it is not what can be satisfied as a speaker @ work board. In this case,
despite the fact that the property has no light, no other suitable material can be found. It is the
current situation of crabs that use these O-materials without fail.
In general, the mechanical strength of the composite formed by price of fiber according to the
effect depends on the mechanical property of each of the fiber and the resin used, but the fiber
and the resin have an Oia association state Even c and c are largely left and right. -The surface of
the synthetic fiber is hydrophobic and electrically negatively charged-asH. On the other hand,
acetic acid beer is currently used for commercial resin Emmarjo. There are homopolymers such
as vinyl chloride, acrylic ester, NBR, 8BR, MBR latex, epoxy, polyethylene polystyrene, etc. ?
copolymer emulsion, and copolymer emulsion, but most of them are anionic emulsion :) reed,
partially There are nonionic emulsions :) IjI n, positive four ono emulsions, but these emulsions
have limited selection of 237 types of Emulsified synthetic fiber side fat processing. When the
base material made of synthetic fiber is made of yellowish orange 6-colored emerald / polished
with a synthetic resin, and the resin is applied to the base material, the synthetic particles and
resin particles in the paper are repelled and united. The-n on the synthetic fiber of the emulsion
is bad <, @ 1 is shown in Fig. 1 and the following ? 1 (2) is formed by the aggregation of the #
fiber with resin only in II 1 (2) Otome or point. The mechanical strength of the composite is
reduced. That is, this composite is effective as a speaker diaphragm, and does not change color
even if it increases the blowout rate (ultimate) due to the deafness. In order to eliminate this
defect, a surfactant is added to the resin emulsion to reduce its surface tension and improve the
permeability of the fibers 4h. SUMMARY OF THE INVENTION In view of the above-mentioned
current situation, the present invention has been made to solve the problems. That is, the present
invention uses the v @ fi noted natural fiber as the main component and the shortcomings of the
material! ????? Lj method 1 synthetic 1 miscellaneous short fiber and synthetic и or t to 4 4
prilized 7 to thin and fm mixed with t base material is cationic resin which is a mixture of sebum
amarjo / which is cationic It is intended to propose processing 9 to provide a loudspeaker
diaphragm according to this. The following is a description of an implementation sequence
according to the present invention. Example 1 A 1 x diameter 5P, 8 to 19 van long polyamide
fiber 1 short fiber, polyamid and de Jl ? ? ? ? ? are fibrillated and mixed with 7tJ fiber, and
dispersed in water with a mixer to obtain a ratio of ordinary loudspeaker diaphragm Paper is
made with a paper making machine, and a 25 inch diameter vibrating temporary substrate is
examined. This n is 150.6. , Pullless heating under the condition F of 5K # / tMI ?, and drying 9t
with an ILt of 7t. Next, 10 parts by weight of water-soluble melamine (methylated
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methylolmelamine) and 1 l amine-based amine catalyst are added to carboxyl group-modified
MBR (methyl methacrylate- ptageie Z copolymer) Emul ') Yoshi 100 Jijlt J Mix parts by weight
and apply a glaze solution to the above-mentioned vibrating plate.
& Carry out under conditions of 130 ░ alO min after natural drying and chestnut. The
diaphragm thus produced has physical properties of 14t for total baking soda, Young's modulus
(average = 2 и, 8 and ILl и d1sJoL internal loss ? ? = +3.18 density (j ')-s, 9). Example 2 The
Young's modulus ? of the diaphragm when changing the MBR content ratio in the fiIJth plate in
Example 1 is shown in-in Fig. 4 and the internal loss (-?) is shown in-in Fig. 5 a-4 Example 1? In
the case of using the ?t 'L 7? resin emulsion, the weight of the resin emulsion is changed to
that of the west boxyl group f (% el BR-c marljo 1 Make it. Boiled soda This Mn 2 is the same as
that used in Example 1 except that it has a coating physical property substantially equal to the
MBR. This diaphragm has a total volume of 14 p / g (d) = 1 2 и 0 End Page: 2 x 101 и d 11%-71 m,
internal loss (tm ?) soul 0.17 ░ dense 1i (f) -1, 55 . Indicates the physical properties of. In this
embodiment, the Young's modulus (I9 in FIG. 4 (O in Fig. 4 and s1 loss (-?) in Fig. 5 is shown in
O of FIG. 5) when the MBR content ratio in the diaphragm is changed. Example 5 In the same
manner as in Example 1, a diaphragm substrate having a total weight of 7 t is obtained. Next,
100 parts by weight of a polyacrylic IJA [l ester emulsion which is cationic] is mixed with 61
parts of a water-soluble melamine (methylated methylolmelamine) and 0.6 parts by weight of a
VgA electron based catalyst. The solution is applied and impregnated onto a Sekisei shaking
board substrate and subjected to natural drying followed by quenching under conditions of * 15
o 'c + 1 o min. Thus, the vibrating plate obtained is 15.21. Jani / f rate 1-4.1 О 10 "411%-Ainternal loss (-?)-и и и 08 dense 1t (f ')-и и и 50 physical properties are shown. The following effects
can be obtained according to the present invention as described above. (3) The present invention
is characterized in that the base material consisting of 9 synthetic fibers is treated with a resin
denatured resin, Emarckyo /, so that the bonding state of J fiber and resin i is improved, The
Young's modulus can be increased without reducing the internal loss of the diaphragm. ? The
surface of synthetic fiber is negatively charged, and the resin particles in Emarayukon are
positively charged. The resin does not coagulate only at the crossover points of the fibers, and as
shown in FIG. Nourishing, the Young's modulus of the diaphragm increases. The reproduction
frequency band of the speaker can be broadened. O The amount of resin required to obtain the
same Young's modulus as the diaphragm according to the conventional method can be reduced,
so that the diaphragm can be reduced in weight and a speaker with excellent transient
characteristics can be obtained. be able to.
Since the mechanical strength of the diaphragm is greatly increased, it is possible to dive in a
speaker that can withstand a strong power. (9) 9 minutes to increase the strength of the
diaphragm-vibration is suppressed, so that a speaker with less distortion can be obtained.
Physical stability such as weather resistance of moving plate is same.
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4. Brief description of the drawings 11, Fig. @ZW, Fig. 5 are enlarged views showing the bonded
state of the sewn fibers and the resin. FIGS. 4 and 5 are diagrams showing the characteristics of
the fii IJJ plate. 1 is a synthetic fiber and 2 is a cocoon. Mr. Kazumasa Yamaguchi, a patent
attorney for the Japanese Columbia Stock Exchange, Ltd. 85-EndPage: ?
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